TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Safieh, Malek A1 - Freudenberger, Jürgen T1 - Montgomery Reduction for Gaussian Integers JF - Cryptography N2 - Modular arithmetic over integers is required for many cryptography systems. Montgomeryreduction is an efficient algorithm for the modulo reduction after a multiplication. Typically, Mont-gomery reduction is used for rings of ordinary integers. In contrast, we investigate the modularreduction over rings of Gaussian integers. Gaussian integers are complex numbers where the real andimaginary parts are integers. Rings over Gaussian integers are isomorphic to ordinary integer rings.In this work, we show that Montgomery reduction can be applied to Gaussian integer rings. Twoalgorithms for the precision reduction are presented. We demonstrate that the proposed Montgomeryreduction enables an efficient Gaussian integer arithmetic that is suitable for elliptic curve cryptogra-phy. In particular, we consider the elliptic curve point multiplication according to the randomizedinitial point method which is protected against side-channel attacks. The implementation of thisprotected point multiplication is significantly faster than comparable algorithms over ordinary primefields. KW - Public-key cryptography KW - Elliptic curve point multiplication KW - Gaussian integers KW - Mont-gomery modular reduction Y1 - 2021 SN - 2410-387X SS - 2410-387X U6 - https://dx.doi.org/10.3390/cryptography5010006 DO - https://dx.doi.org/10.3390/cryptography5010006 IS - 5(1) SP - 18 S1 - 18 PB - MDPI CY - Basel ER - TY - THES U1 - Bachelor Thesis A1 - Leppert, Marie-Louise T1 - Urban car-free mobility BT - Analysis of the applicability of a mobility concept without private cars for the Maun Science Park Botswana N2 - Across the globe, urban areas experience the phenomena of rising road-congestion, air pollution and car accidents. These are just a few popular quantified effects that arise due to rapid, uncoordinated urbanization on a car-centric city layout. There is an urgent need to consider new concepts of urban mobility development to combat these negative effects. Car-free mobility is one notion adopted in diverse formats by numerous cities to create a more inclusive, just, healthy and sustainable urban life. The focus of this thesis is to ex- amine whether a car-free mobility concept is applicable to the Maun Science Park, Bot- swana. Therefore, the idea of car-free mobility, its positive aspects as well as its con- straints, are described first. This illustrates the complexity of urban transport planning as it is intertwined with urban land-use, political vision and people’s perceptions and behav- iors. Secondly, examples and strategies on how to change existing structures are pre- sented. Following this, the smart developments in the field of sustainable urban mobility are considered to provide an insight into their assets and drawbacks. Then the local mo- bility conditions are examined before the car-free concept is exemplarily applied to the Maun Science Park via scenario construction. These scenarios give a first vision of how a car-free concept can be applied to the MSP and additionally provide a starting point for future strategic planning as well as inspiration for other cities to follow along. KW - Mobility KW - Urbanization KW - Car-free mobility KW - Sustainability KW - Maun Science Park Y2 - 2021 SP - XXVIII, 44 S1 - XXVIII, 44 ER - TY - GEN U1 - Studien- und Projektarbeit A1 - Marovic, Dea A1 - Daumer, Lukas T1 - Inflation & Deflation - How do Central Banks React to the Covid-19 Pandemic? BT - Comparison between Europe, USA and Japan N2 - In order to elaborate inflation and deflation tendencies due to the COVID-19 pandemic and how they are tried to be actively influenced, this paper compares news regarding the measurements of central banks in Europe, USA and Japan. Factors affecting inflation are defined in conjunction with the typical measurements of central banks and conclusions are drawn in respect to differences of the most recent correcting behavior. The paper is concluded by discussing how price levels might develop during and after the crisis. KW - COVID-19 financial crisis KW - Central bank KW - Price level changes KW - Inflation KW - Deflation Y1 - 2020 SP - 26 S1 - 26 ER - TY - THES U1 - Master Thesis A1 - Lay, Felix T1 - Development of a synthesis concept for the Smart City Maun Science Park BT - Integration of (digitally) re-programmable space by using the Internet of Things N2 - Cities around the world are facing an increasing number of global and local challenges, such as climate change and scarcity of raw materials. At the same time trends like digitalization, globalization and networking gain in importance. For this reason, cities have started imple-menting smart solutions within the urban structure in order to evolve towards a Smart City. In Botswana, the Maun Science Park is intended to provide a best practice approach for a Bot-swanan Smart City. Since Smart City concepts have to be specifically tailored to local condi-tions, the first main goal of this thesis is to develop a synthesis concept for the Maun Science Park. A key problem in cities is the utilization of space, which is further intensified by increasing urbanization and population growth. Therefore, the second main goal is to develop approaches of (digitally) re-programmable space to use available areas intelligently and optimized. Within the thesis, human-centered design has been applied as structure-giving methodology. By clarifying relevant Smart City contents, considering reference examples as well as identify-ing local challenges and requirements, an appropriate concept has been developed with hu-man-focus. Furthermore, the methodologies of literature research and expert interviews have been used as input in the individual human-centered design phases. In combination with an innovation funnel, the methodology human-centered design forms the structure of the thesis. In total, ten main solution areas and 37 sub-segments have been identified for the synthesis concept of Maun Science Park. Additionally, a concept for Smart Buildings has been devel-oped as a part of the synthesis concept and as an essential infrastructure component of the Maun Science Park (three main segments, 16 sub-segments). Based on expert input, a priori-tization has been determined by evaluating the impact and economic affordability of the indi-vidual sub-areas. Moreover, individual key areas have been highlighted by identifying direct interactions between sub-segments and on the basis of expert input – these are particularly related to the segments Smart Data and Smart People. Besides the synthesis concept, ap-proaches of (digitally) re-programmable space have been created. Thereby, ten approaches refer to the conversion, reuse or expansion abilities of space within daily, weekly or life cycle. In addition, the conventional (digitally) re-programmable space idea has been extended by two new considerations – “multi-purpose use of built-up space” and “concept programming in the planning phase”. Finally, within an overall consideration – synthesis concept combined with approaches of (digitally) re-programmable space – the added value of the developed contents has been outlined, positive and negative aspects have been identified within a SWOT analysis and the business model of the Maun Science Park approach has been verified in a Business Model Canvas. Through explicit elaboration, classification and prioritization of solution areas, the developed concept can serve as a basis for further project steps. Based on the defined requirements of the sub-segments, solutions can be developed with regard to the entire Smart City context. KW - Smart City KW - Internet of Things KW - Digitally re-programmable space KW - Smart Building Y2 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bsz:kon4-opus4-27528 UN - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bsz:kon4-opus4-27528 SP - VI, 110 S1 - VI, 110 ET - Gekürzte Ausgabe ER - TY - RPRT U1 - Forschungsbericht A1 - Thimm, Tatjana T1 - Bericht Forschungssemester WS 2020/2021 Y2 - 2021 SP - 1 S1 - 1 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Sandkamp, Alexander A1 - Yalcin, Erdal T1 - Different antidumping legislations within the WTO: What can we learn from China's varying market economy status? JF - Review of International Economics N2 - This paper examines how varying antidumping methodologies applied within the World Trade Organization differ in the extent to which they reduce targeted exports. We show that antidumping duties, on average, hit Chinese exporters harder than those of other targeted countries. This difference can be traced back in part to China's non-market economy status, which affects the way antidumping duties are calculated. Furthermore, we show that the type of imposed duty matters, as ad-valorem duties affect exports differently compared to specific duties or duties conditional on the export price. Overall, however, antidumping duties remain effective in reducing imports independent of market economy status. KW - Antidumping KW - WTO KW - China Y1 - 2021 SN - 0965-7576 SS - 0965-7576 SN - 1467-9396 SS - 1467-9396 U6 - https://dx.doi.org/10.1111/roie.12538 DO - https://dx.doi.org/10.1111/roie.12538 VL - forthcoming SP - 27 S1 - 27 PB - John Wiley & Sons Ltd. CY - Hoboken, New Jersey ET - Early view ER - TY - THES U1 - Master Thesis A1 - Steinlein, Tim T1 - Implementation of workflows for further development of knowledge management as an essential success factor for sustainable corporate development N2 - Throughout this thesis, the implementation of tools for knowledge management as a key factor for sustainable corporate development, is presented. In industries with a high fluc-tuation rate, such as construction, efficient knowledge management is of particular im-portance. Companies feel the effects of negligent handling of this resource especially dur-ing the Corona pandemic. Restructuring leads to experienced employees leaving the com-pany – and with them the know-how and experience gained. With a systematic knowledge transfer, the most important insights in such situations remain within the or-ganization. Thus, the company becomes crisis-proof and receives all the tools it needs to grow healthily again after the recession. Practical data from competitors indicates that knowledge management promises savings potential of several million euros per year for BAM. Further potentials in the areas of sustainability, customer- and employee satisfac-tion as well as occupational safety, which do not lead to savings, are also worth mention-ing. This thesis determines the current maturity level of knowledge management at BAM, before introducing processes and systems that successively drive the improvement. The developed methods simultaneously help to prevent and solve problems and systematical-ly promote the continuous improvement of all work processes in the company. Detailed steps are presented to carry out change management towards the successful introduction and further development of knowledge management at BAM. A major focus is on interpersonal factors. The related topic of knowledge culture was recently ranked by german think-tank Zukunftsinstitut as one of the top 5 megatrends for companies in the 2020s. The methods developed, contribute to the creation of such a culture and to the transformation of BAM towards a learning organization. Knowledge management identi-fies with the BAM values. In the course of this thesis it will be shown how the system by its very nature, helps to implement these values in the work of every employee. The results of this elaboration were recently awarded the Digital Construction Award 2020 for Business Excellence at BAM Deutschland AG. KW - Wissensmanagement KW - Knowledge Management KW - Platform KW - Corporate Development Y2 - 2020 N1 - Die vorliegende Arbeit enthält vertrauliche Daten. Daher wurde sie teilweise gekürzt. SP - XXIII, 104 S1 - XXIII, 104 ER - TY - THES U1 - Master Thesis A1 - Broderick, David T1 - Financing and Investment Structure of Foreign Real Estate Project Developments in Africa – Maun Science Park in Botswana N2 - Botswana, a new construction project – the Maun Science Park - is to be built with a focus on sustainability and to create a new living space for the rapidly growing population in Africa. The project will be a blueprint for future projects in Africain terms of progress, technology and sustainability. This thesis will deal with its financial framework and will serve as a basis for the development of ways and means of financing such projects. Y2 - 2020 SP - VI, 96 S1 - VI, 96 ER - TY - RPRT U1 - Arbeitspapier A1 - Wehle, Daniel A1 - Manz, Carsten T1 - inno4regio BT - Das Innovationsportal zur Vernetzung von Wirtschaft und Wissenschaft in der Vierländerregion N2 - Unternehmen stehen häufig unter einem Innovationsdruck, um ihre langfristige Wettbewerbsfähigkeit zu sichern. Vor allem kleine und mittelständische Unternehmen sind hier besonders gefordert, da ihnen vielfach die erforderlichen Ressourcen oder Kompetenzträger fehlen und das tägliche operative Geschäft häufig eine intensive Auseinandersetzung mit dem Thema nicht zulässt. Diese Unternehmen sind auf externe Ressourcen angewiesen. Hinzu kommt die Unsicherheit vieler Unternehmer hinsichtlich Kooperationsmöglichkeiten mit öffentlichen Forschungseinrichtungen sowie organisatorische Bedenken mit dem damit verbundenen Koordinationsaufwand. Das Innovationsportal inno4regio kann genau hier Abhilfe schaffen. Mittels standardisierter Prozesse soll den Unternehmern eine Möglichkeit geboten werden, externe Innovationsvorhaben durch eine Problemanalyse anzustoßen und die notwendigen Partner aus der Hochschulwelt einzubinden. Der Zugriff über einen Knotenpunkt auf das fachliche sowie kreative Personal von rund dreißig Hochschulen im Verbund der Internationalen Bodensee-Hochschule ist dabei ein Alleinstellungsmerkmal, welches in dieser Form bisher noch nicht am Markt existiert. T3 - Konstanzer Managementschriften - Band 10 KW - Open Innovation KW - Innovationsportal KW - Innovationsprozess KW - Internationale Bodensee-Hochschule Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bsz:kon4-opus4-27358 UN - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bsz:kon4-opus4-27358 SN - 978-3-939638-18-6 SB - 978-3-939638-18-6 SP - XVIII, 173 S1 - XVIII, 173 PB - Hochschule Konstanz Technik, Wirtschaft und Gestaltung CY - Konstanz ER - TY - RPRT U1 - Forschungsbericht A1 - Manz, Carsten T1 - Erfahrungsbericht Freistellungssemester Prof. Dr. Carsten Manz, WS 2020/2021 N2 - Erfahrungsbericht im Rahmen des Freistellungssemesters gemäß LHG §47 Abs. 2, Prof. Dr. Carsten Manz, Wintersemester 2020/21 Y2 - 2021 SP - IV, 19 S1 - IV, 19 ER - TY - JFULL U1 - Zeitschrift (Einzelnes Zeitschriftenheft) T1 - Jahresbericht Forschung und Transfer 2020 BT - Vorhabenregister nach §41a Landeshochschulgesetz T2 - HTWG Jahresbericht Forschung und Transfer N2 - Forschungsjahresbericht 2020 der Hochschule Konstanz Technik, Wirtschaft und Gestaltung Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bsz:kon4-opus4-27595 UN - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bsz:kon4-opus4-27595 VL - 2020 SP - 98 S1 - 98 PB - Hochschule Konstanz CY - Konstanz ER - TY - RPRT U1 - Forschungsbericht A1 - Staehle, Dirk T1 - Erfahrungsbericht zum Forschungssemester SS 2020 von Prof. Dirk Staehle BT - Time Senstive Networking KW - TSN Y2 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bsz:kon4-opus4-27439 UN - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bsz:kon4-opus4-27439 SP - 8 S1 - 8 ER - TY - RPRT U1 - Forschungsbericht A1 - Staehle, Barbara T1 - Quantum Computing - Some Frequently Asked Questions and Their Answers BT - Bericht zum Fortbildungssemester im Sommersemester 2020 Y2 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bsz:kon4-opus4-27399 UN - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bsz:kon4-opus4-27399 SP - 35 S1 - 35 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Ziegler, Verena T1 - Inbetween – A Post-Digital Turn – Craft-making 4.0 JF - archiDOCT N2 - Traditional Western philosophy, cognitive science and traditional HCI frameworks approach the term digital and its implications with an implicit dualism (nature/cul-ture, theory /practice, body/mind, human/machine). What lies between is a feature of our postmodern times, in which different states, conditions or positions merge and co-exist in a new, hybrid reality, a “continuous beta” (Mühlenbeck & Skibicki, 2007) version of becoming .Post-digitality involves the physical dimensions of spatio-temporal engagements. This new ontological paradigm reconceptualizes digital technology through the ex-perience of the human body and its senses, thus emphasizing form-taking, situation-al engagement and practice rather than symbolic, disembodied rationality. This rais-es two questions in particular: how to encourage curiosity, playfulness, serendipity, emergence, discourse and collectivity? How to construct working methods without foregrounding and dividing the subject into an individual that already takes posi-tion? This paper briefly outlines the rhizomatic framework that I developed within my PhD research. This attempts to overcome two prevailing tendencies: first, the one-sided view of scientific approaches to knowledge acquisition and the pure-ly application-oriented handling of materials, technologies and machines; second, the distanced perception of the world. In contrast, my work involves project-driven alchemic curiosity and doing research through artistic design practice. This means thinking through materials, technologies and machinic interactions. Now, at the end of this PhD journey, 10 interdisciplinary projects have emerged from this ontological queer-paradigm that is post-digital–crafting 4.0. Below I illustrate this approach and its outcomes. Y1 - 2020 UR - http://www.archidoct.net/Issues/ArchiDoct_vol7_iss2/Archidoct%2014%2005%20inbetween.pdf SN - 2309-0103 SS - 2309-0103 VL - Vol. 7 IS - 2 SP - 80 EP - 95 ER - TY - CHAP U1 - Buchbeitrag A1 - Ziegler, Verena T1 - Pop-up Workshopreihe T2 - Matters of Communication - Formen und Materialitäten gestalteter Kommunikation Y1 - 2020 SN - 978-3-8394-5118-2 SB - 978-3-8394-5118-2 SN - 978-3-8376-5118-8 SB - 978-3-8376-5118-8 U6 - https://dx.doi.org/10.14361/9783839451182-021 DO - https://dx.doi.org/10.14361/9783839451182-021 N1 - Volltextzugriff für Angehörige der Hochschule Konstanz möglich. SP - 199 EP - 205 PB - transcript-Verlag CY - Bielefeld ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Tola, Yetenayet B. A1 - Muleta, Obsuman D. A1 - Hofacker, Werner T1 - Low‐cost modified‐atmosphere hermetic storage structures to reduce storage losses of maize (Zea mays L.) cobs and sorghum (Sorghum bicolor L.) heads JF - Journal of the Science of Food and Agriculture N2 - Production and marketing of cereal grains are some of the main activities in developing countries to ensure food security. However, the food gap is complicated further by high postharvest loss of grains during storage. This study aimed to compare low‐cost modified‐atmosphere hermetic storage structures with traditional practice to minimize quantitative and qualitative losses of grains during storage. The study was conducted in two phases: in the first phase, seven hermetic storage structures with or without smoke infusion were compared, and one selected structure was further validated at scaled‐up capacity in the second phase. Y1 - 2020 SN - 1097-0010 SS - 1097-0010 U6 - https://dx.doi.org/10.1002/jsfa.10122 DO - https://dx.doi.org/10.1002/jsfa.10122 VL - Vol. 100 IS - Issue 3 SP - 1132 EP - 1141 PB - Wiley Interscience CY - New York ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Stürmer, Sylvia A1 - Fritz, Walter T1 - Von wegen Bauschutt BT - Sanierung von Ziegelsplitt-Beton der Nachkriegsjahre JF - Bauen im Bestand : B + B N2 - RC-Betone sind keine Neu-Entwicklungen, aber sie erleben seit circa 15 Jahren in Deutschland eine Renaissance mit Materialzusammensetzungen, die den heutigen Anforderungen an Normalbetone gerecht werden. Es gab immer wieder Abschnitte in der (Bau-)Geschichte, in denen Gebäude aus Ziegelsplitt-Betonen errichtet wurden, wie das Max-Kade-Studentenwohnheim in Stuttgart und das Technische Rathaus in Tübingen. Beide stammen aus der Nachkriegszeit und weisen einen guten Erhaltungszustand auf. Sie sind Beispiele für die Bewährung "historischer" Ziegelsplitt-Betone in der Baupraxis und ihre lange technische Lebensdauer. Y1 - 2020 SN - 2190-9504 SS - 2190-9504 N1 - Volltextzugriff für Angehörige der Hochschule Konstanz möglich. VL - 23 IS - 6 SP - 24 EP - 30 PB - Rudolf Müller CY - Köln ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Stürmer, Sylvia A1 - Fritz, Walter T1 - Von historischen Ziegelsplitt- und modernen R-Betonen BT - Ein Plädoyer für mehr Akzeptanz von Recyclingbaustoffen JF - Bausubstanz : Zeitschrift für nachhaltiges Bauen, Bauwerkserhaltung und Denkmalpflege N2 - Weder für moderne Recycling-Betone gemäß Regelwerk noch für Ziegelsplittbetone der Nachkriegsjahre bestehen prinzipielle Bedenken gegen deren Einsatz oder die Weiternutzung im Hochbau. Die Autoren wünschen sich mehr Akzeptanz und Vertrauen in Recyclingbaustoffe und dass sich für "Vintage" im Baubereich irgendwann ein ähnliches Interesse herausbildet wie für Vintage-Möbel oder Used-Look-Kleidung - und dies nicht nur hinsichtlich der Wiederverwendung gebrauchter Türen und Treppen, sondern auch für mineralische Massenbaustoffe wie Beton. Der Beitrag veranschaulicht anhand erfolgreich realisierter Objektbeispiele, wie Hochhäuser (z.B. das Studentenwohnheim Max-Kade-Haus in Stuttgart, 1953, aus Bauschuttbeton) oder Sakralgebäude (Fatima-Kirche in Kassel aus Sichtbeton mit Ziegelbruch, 60 Jahre alt) sowie auch Verwaltungsbauten (Technisches Rathaus in Tübingen aus den 1950er Jahren) erfolgreich und nachhaltig mit Recyclingmaterialien errichtet wurden. Y1 - 2020 SN - 2190-4278 SS - 2190-4278 VL - 11 IS - 6 SP - 37 EP - 43 PB - Fraunhofer IRB-Verlag CY - Stuttgart ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Jödicke, Katrin A1 - Zirkler, Robin A1 - Eckhard, Timo A1 - Hofacker, Werner A1 - Jödicke, Bernd T1 - High End Quality Measuring in Mango Dryingthrough Multi-Spectral Imaging Systems JF - ChemEngineering; Special Issue "Selected papers from the Third Nordic Baltic Drying Conference (NBDC 2019)" N2 - In modern fruit processing technology, non-destructive quality measuring techniques aresought for determining and controlling changes in the optical, structural, and chemical properties of theproducts. In this context, changes inside the product can be measured during processing. Especiallyfor industrial use, fast, precise, but robust methods are particularly important to obtain high-qualityproducts. In this work, a newly developed multi-spectral imaging system was implemented andadapted for drying processes. Further it was investigated if the system could be used to link changesin the surface spectral reflectance during mango drying with changes in moisture content andcontents of chemical components. This was achieved by recovering the spectral reflectance frommulti-spectral image data and comparing the spectral changes with changes of the total soluble solids(TSS), pH-value and the relative moisture contentxwbof the products. In a first step, the camera wasmodified to be used in drying, then the changes in the spectra and quality criteria during mangodrying were measured. For this, mango slices were dried at air temperatures of 40–80◦C and relativeair humidities of 5%–30%. Samples were analyzed and pictures were taken with the multi-spectralimaging system. The quality criteria were then predicted from spectral data. It could be shown thatthe newly developed multi-spectral imaging system can be used for quality control in fruit drying.There are strong indications as well, that it can be employed for the prediction of chemical qualitycriteria of mangoes during drying. This way, quality changes can be monitored inline during theprocess using only one single measuring device. KW - Multi-spectral imaging systems KW - Fruit drying KW - Spectral changes KW - Chemical quality criteria KW - Quality prediction Y1 - 2020 SN - 2305-7084 SS - 2305-7084 U6 - https://dx.doi.org/10.3390/chemengineering4010008 DO - https://dx.doi.org/10.3390/chemengineering4010008 VL - Vol. 4 IS - Issue 1 SP - 13 S1 - 13 PB - MDPI AG CY - Basel, CH ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Braun, Sarah A1 - Stürmer, Sylvia A1 - Hoffmann, Cristina T1 - Feuchteadsorption unterschiedlicher Estriche bei verschiedenen Klimabedingungen JF - Der Bausachverständige : Zeitschrift für Bauschäden, Baurecht und gutachterliche Tätigkeit N2 - Die wenigen Literaturangaben zu Sorptionsisothermen von mineralischen Estrichen beziehen sich im Wesentlichen auf Calciumsulfatestriche und genormte Zementestriche, sowie i.d.R. nur auf eine festgesetzte Lufttemperatur (= 20 Grad C). Daher war es das Anliegen der im Beitrag beschriebenen Untersuchung, die Feuchtigkeitseigenschaften von Estrichen bei unterschiedlichen Klimaten mithilfe von Sorptionsisothermen zu charakterisieren. Ergänzend sollten die seit ca. 20 Jahren marktüblichen ternären Schnellzemente mit untersucht und die baupraktisch interessanten Temperaturen von 15 Grad C und 25 Grad C einbezogen werden. Ebenso wurden die Auswirkungen der Klimabedingungen auf der Baustelle (Jahreszeit, Luftfeuchtigkeit, Temperatur) auf den Hydratationsvorgang der Estriche untersucht. In Kombination mit den Ergebnissen der Gefügeuntersuchungen (u.a. Hg-Porosimetrie) wird belegt, weshalb sich die zement- und schnellzementgebundenen Estriche vollkommen anders verhalten als die calciumsulfatgebundenen Estriche. Dieses unterschiedliche Verhalten ist auch einer der Gründe, warum Estriche mit der KRL-Methode in Bezug auf ihren Feuchtegehalt nicht bewertet werden können. Deshalb folgt ein Vergleich der Materialfeuchtemessungen "KRL-Methode" mit der handwerksüblichen und seit Jahrzehnten in der Praxis bewährten "CM-Methode". Y1 - 2020 SN - 1614-6123 SS - 1614-6123 VL - 16 IS - 4 SP - 21 EP - 26 PB - Fraunhofer IRB-Verlag CY - Stuttgart ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Keller, Simon A1 - Mueller, Rainer T1 - Decentralized stream processing for spatial range queries in high-density systems T2 - MobiArch'20: Proceedings of the ACM MobiArch 2020 - The 15th Workshop on Mobility in the Evolving Internet Architecture, 21. September 2020, London, UK N2 - Location-aware mobile devices are becoming increasingly popular and GPS sensors are built into nearly every portable unit with computational capabilities. At the same time, the emergence of location-aware virtual services and ideas calls for new efficient spatial real-time queries. Communication latency in mobile environments interacting with high decentralization and the need of scalability in high-density systems with immense client counts leads to major challenges. In this paper we describe a decentralized architecture for continuous range queries in settings in which both, the requested and the requesting clients, are mobile. While prior works commonly use a request-response approach we provide a stream-based adaptive grid solution dealing with arbitrary high client counts and improving communication latency that meets given hard real-time constraints. Y1 - 2020 SN - 978-1-4503-8081-2 SB - 978-1-4503-8081-2 U6 - https://dx.doi.org/10.1145/3411043.3412503 DO - https://dx.doi.org/10.1145/3411043.3412503 SP - 36 EP - 41 PB - Association for Computing Machinery CY - New York ER - TY - THES U1 - Bachelor Thesis A1 - Bendel, Julian T1 - Nutzung regionaler Ressourcen, insbesondere Lehm und Holz als nachhaltige und wirtschaftliche Baumaterialien im Zusammenhang mit der Realisierung des Maun Science Park in Botswana für zukünftige Bauprojekte weltweit Y2 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bsz:kon4-opus4-27070 UN - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bsz:kon4-opus4-27070 SP - VI, 60 S1 - VI, 60 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Weber, Lucas A1 - Gaiduk, Maksym A1 - Scherz, Wilhelm Daniel A1 - Seepold, Ralf T1 - Cardiac Abnormality Detection in 12-lead ECGs With Deep Convolutional Neural Networks Using Data Augmentation T2 - Computing in Cardiology (CinC 2020, September 13th-16th, Rimini, Italy, virtual) N2 - A residual neural network was adapted and applied to the Physionet/Computing data in Cardiology Challenge 2020 to detect 24 different classes of cardiac abnormalities from 12-lead. Additive Gaussian noise, signal shifting, and the classification of signal sections of different lengths were applied to prevent the network from overfitting and facilitating generalization. Due to the use of a global pooling layer after the feature extractor, the network is independent of the signal’s length. On the hidden test set of the challenge, the model achieved a validation score of 0.656 and a full test score of 0.27, placing us 15th out of 41 officially ranked teams (Team name: UC_Lab_Kn). These results show the potential of deep neural networks for ap- plication to raw data and a complex multi-class multi-label classification problem, even if the training data is from di- verse datasets and of differing lengths. KW - Deep Convolutional Neural Network KW - Residual Neural Network KW - ECG Y1 - 2020 SN - 2325-887X SS - 2325-887X SN - 0276-6574 SS - 0276-6574 SN - 978-1-7281-7382-5 SB - 978-1-7281-7382-5 U6 - https://dx.doi.org/10.22489/CinC.2020.229 DO - https://dx.doi.org/10.22489/CinC.2020.229 VL - 47 SP - 4 S1 - 4 PB - IEEE ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Shkilniuk, Yurii A1 - Gaiduk, Maksym A1 - Seepold, Ralf T1 - Unobtrusive Accelerometer-Based Heart Rate Detection T2 - Applications in Electronics Pervading Industry, Environment and Society : APPLEPIES 2020, 19. - 20. November 2020, virtual, (Lecture Notes in Electrical Engineering ; Vol. 738), (Lecture Notes in Electrical Engineering; Vol. 738) N2 - Ballistocardiography (BCG) can be used to monitor heart rate activity. Besides, the accelerometer should have high sensitivity and minimal internal noise; a low-cost approach was taken into consideration. Several measurements have been executed to determine the optimal positioning of a sensor under the mattress to obtain a signal strong enough for further analysis. A prototype for an unobtrusive accelerometer-based measurement system has been developed and tested in a conventional bed without any specific extras. The influence of the human sleep position for the output accelerometer data was tested. The obtained results indicate the potential to capture BCG signals using accelerometers. The measurement system can detect heart rate in an unobtrusive form in the home environment. KW - Ballistocardiography KW - Sleep medicine KW - BCG Y1 - 2021 SN - 978-3-030-66729-0 SB - 978-3-030-66729-0 SN - 978-3-030-66728-3 SB - 978-3-030-66728-3 U6 - https://dx.doi.org/10.1007/978-3-030-66729-0_6 DO - https://dx.doi.org/10.1007/978-3-030-66729-0_6 SP - 49 EP - 54 PB - Springer CY - Cham ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Gaiduk, Maksym A1 - Seepold, Ralf A1 - Martínez Madrid, Natividad A1 - Ortega, Juan Antonio A1 - Conti, Massimo A1 - Orcioni, Simone A1 - Penzel, Thomas A1 - Scherz, Wilhelm Daniel A1 - Perea, Juan José A1 - Alarcón, Ángel Serrano A1 - Weiss, Gerald T1 - A Comparison of Objective and Subjective Sleep Quality Measurement in a Group of Elderly Persons in a Home Environment T2 - Applications in Electronics Pervading Industry, Environment and Society : APPLEPIES 2020, 19. - 20. November 2020, virtual, (Lecture Notes in Electrical Engineering ; Vol. 738) N2 - The main aim of presented in this manuscript research is to compare the results of objective and subjective measurement of sleep quality for older adults (65+) in the home environment. A total amount of 73 nights was evaluated in this study. Placing under the mattress device was used to obtain objective measurement data, and a common question on perceived sleep quality was asked to collect the subjective sleep quality level. The achieved results confirm the correlation between objective and subjective measurement of sleep quality with the average standard deviation equal to 2 of 10 possible quality points. KW - Sleep medicine KW - Sleep quality Y1 - 2021 SN - 978-3-030-66729-0 SB - 978-3-030-66729-0 SN - 978-3-030-66728-3 SB - 978-3-030-66728-3 U6 - https://dx.doi.org/10.1007/978-3-030-66729-0_35 DO - https://dx.doi.org/10.1007/978-3-030-66729-0_35 SP - 286 EP - 291 PB - Springer CY - Cham ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Selig, Christoph J. A1 - Lang, Christina A1 - Off, Rebecca A1 - Baltes, Guido H. T1 - Die Fantastischen Vier – Kernrollen des Corporate Entrepreneurship JF - PERSONALquarterly N2 - Forschungsfrage: Welche Rollen lassen sich in Corporate Entrepreneurship identifizieren? Wie unterscheiden sich diese anhand verschiedener Merkmale und welche Fähigkeiten scheinen besonders relevant für ihre erfolgreiche Ausführung? Methodik: Explorative Studie mit 56 semi-strukturierten Interviews mit Corporate-Entrepreneurship-Aktivitäten im DACH-Raum Praktische Implikationen: Ein genaues Verständnis über die jeweiligen Rollen, ihre Unterschiedlichkeiten und Anforderungen ist notwendig, um die verschiedenen Corporate-Entrepreneurship-Aktivitäten mit passendem Personal zu besetzen. Y1 - 2020 N1 - Volltextzugriff für Angehörige der Hochschule Konstanz via Wirtschaftsdatenbank WISO möglich. IS - 04/2020 SP - 27 EP - 33 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Heinzelmann, Nicolai A1 - Baltes, Guido H. T1 - The Use of Corporate Entrepreneurship in Innovation Portfolios of the German Mittelstand T2 - G-Forum Conference 2020; 24. Interdisziplinäre Jahreskonferenz zu Entrepreneurship, Innovation und Mittelstand (28. September bis 02. Oktober 2020), virtual, Förderkreis Gründungs-Forschung e.V. (FGF), Krefeld Y1 - 2020 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Hörtnagl, Arnulf A1 - Siegfried, Michael T1 - Der digitale Seilüberwacher JF - Arbeitswelt Aargau N2 - Die BRUGG Lifting AG konnte dank dem Forschungsfonds Aargau gemeinsam mit dem Institut für Werkstoffsystemtechnik einen Sensor entwickeln, der Wartungsarbeiten an Seilen und Schutznetzen besser planbar macht. Y1 - 2020 VL - 32 IS - 4 SP - 12 EP - 13 PB - Amt für Wirtschaft und Arbeit (AWA) des Kantons Aargau CY - Aarau ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Beckmann, Rüdiger A1 - Bogatzky, Torsten T1 - Werkstoffsystemtechnik mit Blickpunkt auf Nichtrostende Stähle JF - Focus Rostfrei Y1 - 2020 SN - 1430-0036 SS - 1430-0036 IS - 20 SP - 20 EP - 25 PB - Verlag Focus Rostfrei GmbH CY - Xanten ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Sorg, Matthias T1 - Edelstahl Rostfrei - Nachhaltige Substitution bei Fischzuchtnetzen JF - Focus Rostfrei N2 - In beispielhafter Zusammenarbeit zwischen Industrie (Geobrugg AG, Romanshorn/Schweiz) und Wissenschaft (WITg Institut für Werkstoffsystemtechnik Thurgau an der Hochschule Konstanz, Tägerwilen/Schweiz) wurde mit Unterstützung der Schweizer staatlichen Innovationsförderung (KTI, hee Innosuisse) ein neues Werkstoff- und Fertigungskonzept für den Bau von Fischzuchtnetzen aus hochfesten nichtrostenden Stahldrähten entwickelt. Diese Entwicklung wurde 2019 von Swiss Inox, der Schweizer Innovationspreis Prix Inox ausgezeichnet. Y1 - 2020 SN - 1430-0036 SS - 1430-0036 IS - 04 SP - 40 EP - 41 PB - Verlag Focus Rostfrei GmbH CY - Xanten ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Sinzig, Martin A1 - Bogatzky, Torsten A1 - Hörtnagl, Arnulf T1 - "Hidden Champions" unterstützen JF - Swissmechanic Journal N2 - Forschungsprojekte und ein Werkstoffcoaching für Start-ups sollen innovative KMU fördern. Torsten Bogatzky, operativer Leiter des Instituts für Werkstoffsystemtechnik Thurgau (WITg) in Tägerwilen, und Arnulf Hörtnagl, Leiter Forschungsprojekte, erklären, wohin die Reise geht. Y1 - 2020 VL - 91 IS - 5 SP - 14 EP - 15 PB - Swissmechanic CY - Weinfelden ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Sorg, Matthias A1 - Eicher, Manuel T1 - Überwachung der Korrosion von Schutzverbauungen JF - Swissmechanic Journal N2 - Die Geobrugg AG hat zusammen mit dem Institut für Werkstoffsystemtechnik Thurgau (WITg) ein digitales Monitoringsystem entwickelt, das zum einen die Korrosion der Bauwerke überwacht, zum anderen auch die mechanische Einwirkung auf die Verbauung registriert. Y1 - 2020 VL - 91 IS - 8 SP - 44 EP - 45 PB - Swissmechanic CY - Weinfelden ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Giones, Ferran A1 - Ungerer, Christina A1 - Baltes, Guido H. T1 - Balancing financial, social, and environmental values - can new ventures make an impact without sacrificing profits? JF - International Journal of Entrepreneurial Venturing (IJEV) N2 - What drives entrepreneurial action to create a lasting impact? The creation of new ventures that aim at having an impact beyond their financial performance face additional challenges: achieving economic sustainability and at the same time addressing social or environmental issues. Little is known on how these new hybrid organizations, aiming for multiple impact dimensions, manage to be congruent with their blended values. A dataset of 4,125 early-stage ventures is used to gain insights into how blended values are converted into financial, social and environmental impacts, giving shape to different types of hybrid organizations. Our findings suggest new hybrid organizations might opt to sacrifice financial impact to achieve social impact, yet this is not the case when they aim to generate environmental or sustainable impact. Therefore, the tensions and sacrifices related to holding blended values are not homogeneous across all types of new hybrid organizations. KW - Venture creation KW - Hybrid organizations KW - Blended values KW - Social impact KW - Entrepreneurship Y1 - 2020 UR - https://www.inderscienceonline.com/doi/abs/10.1504/IJEV.2020.105138 SN - 1742-5360 SS - 1742-5360 SN - 1742-5379 SS - 1742-5379 U6 - https://dx.doi.org/10.1504/IJEV.2020.105138 DO - https://dx.doi.org/10.1504/IJEV.2020.105138 VL - 12 IS - 1 SP - 39 EP - 57 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Heinzelmann, Nicolai A1 - Selig, Christoph J. A1 - Baltes, Guido H. T1 - Critical Actions of and Synergies between Corporate Entrepreneurship Programs T2 - 26th IEEE International Conference on Engineering, Technology and Innovation (ICE/ITMC), 15-17 June 2020, Cardiff, UK, virtual N2 - Uncertainty about the future requires companies to create discontinuous innovations. Established companies, however, struggle to do so; whereas independent startups seem to better cope with this. Consequently, established companies set up entrepreneurial initiatives to make use of startups' benefits. Consequently, this led-amongst others-to great interest in socalled corporate entrepreneurship (CE) programs and to the development and characterization of several different forms. Their processes to achieve certain objectives, yet, are still rather ineffective. Thus, considerations of the actions performed in preparation for and during CE programs could be one approach to improve this but are still absent today. Furthermore, the increasing use of several CE programs in parallel seems to bear the potential for synergies and, thus, more efficient use of resources. Aiming to provide insights to both issues, this study analyzes actions of CE programs, by looking at interviews with managers of seven corporate incubators and accelerator programs of five established German tech-companies. KW - Corporate entrepreneurship KW - Corporate accelerator KW - Corporate incubator KW - Actions KW - Synergies Y1 - 2020 SN - 978-1-7281-7037-4 SB - 978-1-7281-7037-4 U6 - https://dx.doi.org/10.1109/ICE/ITMC49519.2020.9198565 DO - https://dx.doi.org/10.1109/ICE/ITMC49519.2020.9198565 N1 - Volltextzugriff für Angehörige der Hochschule Konstanz via Datenbank IEEE Xplore möglich SP - 9 S1 - 9 PB - IEEE ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Selig, Christoph J. A1 - Baltes, Guido H. T1 - Strengthening Organizational Ambidexterity through Corporate Entrepreneurship Activities T2 - 26th IEEE International Conference on Engineering, Technology and Innovation (ICE/ITMC), 15-17 June 2020, Cardiff, UK, virtual N2 - In today's volatile world, established companies must be capable of optimizing their core business with incremental innovations while simultaneously developing discontinuous innovations to maintain their long-term competitiveness. Balancing both is a major challenge for companies, since different types of innovation require different organizational structures, operational modes and management styles. Established companies tend to excel in improving their current business through incremental innovations which are closely related to their current knowledge base and competencies. However, this often goes hand in hand with challenges in the exploration of knowledge that is new to the company and that is essential for the development of discontinuous innovations. In this respect, the concept of corporate entrepreneurship is recognized as a way to strengthen the exploration of new knowledge and to support the development of discontinuous innovation. For managing corporate entrepreneurship more effectively, it is crucial to understand which types of knowledge can be created through corporate entrepreneurship and which organizational designs are more suited to gain certain types of knowledge. To answer these questions, this study analyzed 23 semi-structured interviews conducted with established companies that are running such entrepreneurial activities. The results show (1) that three general types of knowledge can be explored through corporate entrepreneurship and (2) that some organizational designs are more suited to explore certain knowledge types than others are. KW - Organizational ambidexterity KW - Corporate entrepreneurship KW - Corporate venturing KW - Knowledge exploration KW - Discontinuous innovation Y1 - 2020 SN - 978-1-7281-7037-4 SB - 978-1-7281-7037-4 U6 - https://dx.doi.org/10.1109/ICE/ITMC49519.2020.9198426 DO - https://dx.doi.org/10.1109/ICE/ITMC49519.2020.9198426 N1 - Volltextzugriff für Angehörige der Hochschule Konstanz via Datenbank IEEE Xplore möglich SP - 9 S1 - 9 PB - IEEE ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Off, Rebecca A1 - Reuther, Kevin A1 - Ungerer, Christina A1 - Baltes, Guido H. T1 - Major Developments in a Decade of Entrepreneurship Research: A Machine Learning Based Review of the Literature T2 - G-Forum Conference 2020; 24. Interdisziplinäre Jahreskonferenz zu Entrepreneurship, Innovation und Mittelstand (28. September bis 02. Oktober 2020), virtual, Förderkreis Gründungs-Forschung e.V. (FGF), Krefeld N2 - We have analyzed a pool of 37,839 articles published in 4,404 business-related journals in the entrepreneurship research field using a novel literature review approach that is based on machine learning and text data mining. Most papers have been published in the journals ‘Small Business Economics’, ‘International Journal of Entrepreneurship and Small Business’, and ‘Sustainability’ (Switzerland), while the sum of citations is highest in the ‘Journal of Business Venturing’, ‘Entrepreneurship Theory and Practice’, and ‘Small Business Economics’. We derived 29 overarching themes based on 52 identified clusters. The social entrepreneurship, development, innovation, capital, and economy clusters represent the largest ones among those with high thematic clarity. The most discussed clusters measured by the average number of citations per assigned paper are research, orientation, capital, gender, and growth. Clusters with the highest average growth in publications per year are social entrepreneurship, innovation, development, entrepreneurship education, and (business-) models. Measured by the average yearly citation rate per paper, the thematic cluster ‘research’, mostly containing literature studies, received most attention. The MLR allows for an inclusion of a significantly higher number of publications compared to traditional reviews thus providing a comprehensive, descriptive overview of the whole research field. KW - Entrepreneurship KW - Literature Review KW - Machine Learning KW - Text Mining Y1 - 2020 SP - 6 S1 - 6 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Friedrich, Volker T1 - Die Rhetorik der Technik als Motor der Utopie BT - Über den bedeutenden deutschen Science-fiction-Roman »Auf zwei Planeten« von Kurd Laßwitz JF - Rhetorik - Ein internationales Jahrbuch Y1 - 2020 SN - 0720-5775 SS - 0720-5775 SN - 1865-9160 SS - 1865-9160 U6 - https://dx.doi.org/10.1515/rhet-2020-0005 DO - https://dx.doi.org/10.1515/rhet-2020-0005 N1 - Volltextzugriff für Angehörige der Hochschule Konstanz im Campusnetz möglich VL - Band 39 IS - 1 SP - 15 EP - 33 PB - de Gruyter CY - Berlin ER - TY - CHAP U1 - Buchbeitrag A1 - Kleinfeld, Annette T1 - Effektives Compliance-Management durch interaktive Schulung und Kommunikation T2 - Handbuch Compliance-Management : Konzeptionelle Grundlagen, praktische Erfolgsfaktoren, globale Herausforderungen N2 - 1863 dichtet der Volksautor Wilhelm Busch die Geschichte von Max und Moritz, zweier Lausbuben, die gegen Regeln und Sitten der Dorfgemeinschaft verstoßen und das Zusammenleben empfindlich stören. Busch zeigt in seiner Dichtung schon in der Einleitung den Kern des Problems auf. „Ach, was muß man oft von bösen Kindern hören oder lesen! Wie zum Beispiel hier von diesen, Welche Max und Moritz hießen; Die, anstatt durch weise Lehren Sich zum Guten zu bekehren, Oftmals noch darüber lachten Und sich heimlich lustig machten. Ja, zur Übeltätigkeit, Ja, dazu ist man bereit!“ Max und Moritz weigern sich, die Schule zu besuchen und sich regelkonform und anständig zu verhalten. Ihre Uneinsichtigkeit und ihre Rücksichtslosigkeit enden für die beiden tödlich, und erst mit diesem Ende kehrt wieder Ruhe im Dorf ein. Der Zusammenhang zwischen der bekannten Kindergeschichte „Max und Moritz“ von Wilhelm Busch und aktuellen Wirtschafts- und Unternehmensskandalen scheint vielleicht auf den ersten Blick etwas weit hergeholt. Als „modernes Märchen“ sprechen diese Geschichte und ihre Moral aber letztlich genau von dem, was Unternehmen heute weltweit zu schaffen macht. Ohne die bekannten Lausbubenstreiche mit Spielarten moderner Wirtschaftskriminalität gleichsetzen zu wollen, lässt sich aus den sieben Streichen für unser Thema folgendes ableiten: – Regelwidriges Verhalten kann überall auftauchen – Unter dem Fehlverhalten einzelner haben alle zu leiden – Das Funktionieren des übergeordneten Systems wird nachhaltig gestört – Und: klassische „Erziehungsversuche“ erweisen sich häufig als wirkungslos Y1 - 2020 UR - https://www.compliancedigital.de/978-3-503-18785-0_10586 SN - 978-3-503-18785-0 SB - 978-3-503-18785-0 N1 - Volltextzugriff für Angehörige der Hochschule Konstanz im Campusnetz möglich SP - 755 EP - 780 PB - Erich Schmidt Verlag CY - Berlin ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Haberzettl, Katrin A1 - Göllinger, Thomas T1 - Pfadabhängigkeiten bei der Einführung von Homeoffice und Teleworking JF - IöB-Schriften N2 - Aufgrund der Corona-Pandemie kam es 2020 zu einer verstärkten Nutzung von Homeoffice und Teleworking. Sowohl bzgl. der Wahl des Arbeitsortes als auch der genutzen Kommunikationstechnologien existieren Pfadabhängigkeiten. Der Beitrag thematisiert diese Pfadabhängigkeiten systematisch, insbesondere ihre Ursachen und Folgen sowie die Möglichkeiten zur Pfadbrechung. KW - Homeoffice KW - Teleworking KW - Pfadabhängigkeiten Y1 - 2020 U6 - https://dx.doi.org/10.13140/RG.2.2.27440.58880 DO - https://dx.doi.org/10.13140/RG.2.2.27440.58880 IS - 2 PB - Institut für ökologische Betriebswirtschaft (IöB) e.V. CY - Siegen ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Göllinger, Thomas A1 - Harrer-Puchner, Gabriele T1 - 40 Jahre Neuland des Denkens BT - Frederic Vesters programmatische Schrift für eine nachhaltige Zukunft JF - IöB-Schriften N2 - Vor 40 Jahren erschien Frederic Vesters Hauptwerk „Neuland des Denkens“. Der Beitrag beleuchtet die wesentlichen Themen dieses programmatischen Buches im Hinblick auf Vesters Biokybernetik und deren Anwendung auf zahlreiche aktuelle Fragen in der Nachhaltigkeits-Debatte, z.B. Klimawandel-Problematik und Energiewende. KW - Biokybernetik KW - Nachhaltigkeit Y1 - 2020 U6 - https://dx.doi.org/10.13140/RG.2.2.27099.80164 DO - https://dx.doi.org/10.13140/RG.2.2.27099.80164 IS - 1 SP - 29 S1 - 29 PB - Institut für ökologische Betriebswirtschaft (IöB) e.V. CY - Siegen ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Gaschnig, Hannes A1 - Göllinger, Thomas T1 - Discussion of energy policy goals with the target circle concept JF - Forum Ware N2 - We provide an overview of the ongoing discussions on the objectives of the energy transition in the form of a conceptual framework, intending to facilitate the search for the most viable options for a successful transformation of the energy system. For this purpose, we examine the development of energy policy goals in Germany in the past and present, whereby we give an overview of objectives and assessment approaches from politics, economics, and science. Moreover, we then merge the different views into a common framework and analyze the central conflict between the wholeness of a hypothetical target circle and the simplification in favor of a hypothetical target point in more detail. KW - Energy transition KW - Conceptual framework Y1 - 2020 UR - http://www.dgwt.de/category/forum-ware SN - 2365-404X SS - 2365-404X VL - 2018/2019 IS - 46 SP - 15 S1 - 15 PB - Deutsche Gesellschaft für Warenkunde und Technologie e.V. (DGWT) CY - Berlin; Wien ET - Online-Ausgabe ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Rohweder, Daniel A1 - Oleschak, Patrick A1 - Shavgulidze, Sergo A1 - Freudenberger, Jürgen T1 - Generalized Multistream Spatial Modulation Based on One Mannheim Error Correcting Codes and their Low-Complexity Detection T2 - ICCE Berlin 2020, 10th IEEE International Conference on Consumer Electronics, 9.-12.11.2020, virtual N2 - This paper proposes a novel transmission scheme for generalized multistream spatial modulation. This new approach uses one Mannheim error correcting codes over Gaussian or Eisenstein integers as multidimensional signal constellations. These codes enable a suboptimal decoding strategy with near maximum likelihood performance for transmission over the additive white Gaussian noise channel. In this contribution, this decoding algorithm is generalized to the detection for generalized multistream spatial modulation. The proposed method can outperform conventional generalized multistream spatial modulation with respect to decoding performance, detection complexity, and spectral efficiency. Y1 - 2020 UR - https://edas.info/p27511 SP - 6 S1 - 6 PB - IEEE ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Nicolas Bailon, Daniel A1 - Thiers, Johann-Philipp A1 - Freudenberger, Jürgen T1 - Soft-input decoding of concatenated codes based on the Plotkin construction and BCH component codes T2 - ICCE Berlin 2020, 10th IEEE International Conference on Consumer Electronics, 9.-12.11.2020, virtual N2 - Low latency communication requires soft-input decoding of binary block codes with small to medium block lengths. In this work, we consider generalized multiple concatenated (GMC) codes based on the Plotkin construction. These codes are similar to Reed-Muller (RM) codes. In contrast to RM codes, BCH codes are employed as component codes. This leads to improved code parameters. Moreover, a decoding algorithm is proposed that exploits the recursive structure of the concatenation. This algorithm enables efficient soft-input decoding of binary block codes with small to medium lengths. The proposed codes and their decoding achieve significant performance gains compared with RM codes and recursive GMC decoding. Y1 - 2020 UR - https://edas.info/p27511 SP - 5 S1 - 5 PB - IEEE ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Thiers, Johann-Philipp A1 - Nicolas Bailon, Daniel A1 - Freudenberger, Jürgen T1 - Bit-Labeling and Page Capacities of TLC Non-Volatile Flash Memories T2 - ICCE Berlin 2020, 10th IEEE International Conference on Consumer Electronics, 9.-12.11.2020, virtual N2 - The reliability of flash memories suffers from various error causes. Program/erase cycles, read disturb, and cell to cell interference impact the threshold voltages and cause bit errors during the read process. Hence, error correction is required to ensure reliable data storage. In this work, we investigate the bit-labeling of triple level cell (TLC) memories. This labeling determines the page capacities and the latency of the read process. The page capacity defines the redundancy that is required for error correction coding. Typically, Gray codes are used to encode the cell state such that the codes of adjacent states differ in a single digit. These Gray codes minimize the latency for random access reads but cannot balance the page capacities. Based on measured voltage distributions, we investigate the page capacities and propose a labeling that provides a better rate balancing than Gray labeling. Y1 - 2020 UR - https://edas.info/p27511 SP - 6 S1 - 6 PB - IEEE ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Thiers, Johann-Philipp A1 - Safieh, Malek A1 - Freudenberger, Jürgen T1 - Side Channel Attack Resistance of the Elliptic Curve Point Multiplication using Eisenstein Integers T2 - ICCE Berlin 2020, 10th IEEE International Conference on Consumer Electronics, 9.-12.11.2020, virtual N2 - Asymmetric cryptography empowers secure key exchange and digital signatures for message authentication. Nevertheless, consumer electronics and embedded systems often rely on symmetric cryptosystems because asymmetric cryptosystems are computationally intensive. Besides, implementations of cryptosystems are prone to side-channel attacks (SCA). Consequently, the secure and efficient implementation of asymmetric cryptography on resource-constrained systems is demanding. In this work, elliptic curve cryptography is considered. A new concept for an SCA resistant calculation of the elliptic curve point multiplication over Eisenstein integers is presented and an efficient arithmetic over Eisenstein integers is proposed. Representing the key by Eisenstein integer expansions is beneficial to reduce the computational complexity and the memory requirements of an SCA protected implementation. Y1 - 2020 UR - https://edas.info/p27511 SP - 6 S1 - 6 PB - IEEE ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Ugrelidze, Nodar A1 - Shavgulidze, Sergo A1 - Freudenberger, Jürgen T1 - Four-Dimensional Signal Constellations Based on Binary Frequency-Shift Keying and M-ary Amplitude-Phase-Shift Keying JF - Journal of Computer and Communications N2 - In this article, we give the construction of new four-dimensional signal constellations in the Euclidean space, which represent a certain combination of binary frequency-shift keying (BFSK) and M-ary amplitude-phase-shift keying (MAPSK). Description of such signals and the formulas for calculating the minimum squared Euclidean distance are presented. We have developed an analytic building method for even and odd values of M. Hence, no computer search and no heuristic methods are required. The new optimized BFSK-MAPSK (M = 5,6,···,16) signal constructions are built for the values of modulation indexes h =0.1,0.15,···,0.5 and their parameters are given. The results of computer simulations are also provided. Based on the obtained results we can conclude, that BFSK-MAPSK systems outperform similar four-dimensional systems both in terms of minimum squared Euclidean distance and simulated symbol error rate. Y1 - 2020 SN - 2327-5227 SS - 2327-5227 SN - 2327-5219 SS - 2327-5219 U6 - https://dx.doi.org/10.4236/jcc.2020.812016 DO - https://dx.doi.org/10.4236/jcc.2020.812016 VL - 8 IS - 12 SP - 170 EP - 180 PB - Scientific Research Publishing Inc. CY - Wuhan, China ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Safieh, Malek A1 - Thiers, Johann-Philipp A1 - Freudenberger, Jürgen T1 - A Compact Coprocessor for the Elliptic Curve Point Multiplication over Gaussian Integers JF - Electronics N2 - This work presents a new concept to implement the elliptic curve point multiplication (PM). This computation is based on a new modular arithmetic over Gaussian integer fields. Gaussian integers are a subset of the complex numbers such that the real and imaginary parts are integers. Since Gaussian integer fields are isomorphic to prime fields, this arithmetic is suitable for many elliptic curves. Representing the key by a Gaussian integer expansion is beneficial to reduce the computational complexity and the memory requirements of secure hardware implementations, which are robust against attacks. Furthermore, an area-efficient coprocessor design is proposed with an arithmetic unit that enables Montgomery modular arithmetic over Gaussian integers. The proposed architecture and the new arithmetic provide high flexibility, i.e., binary and non-binary key expansions as well as protected and unprotected PM calculations are supported. The proposed coprocessor is a competitive solution for a compact ECC processor suitable for applications in small embedded systems. KW - Elliptic curve cryptography KW - Elliptic curve point multiplication KW - Gaussian integers KW - Montgomery modular reduction KW - Processor KW - Resource-constrained systems Y1 - 2020 SN - 2079-9292 SS - 2079-9292 U6 - https://dx.doi.org/10.3390/electronics9122050 DO - https://dx.doi.org/10.3390/electronics9122050 VL - 9 IS - 12 SP - 21 S1 - 21 PB - MDPI ET - 2050-v2 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Brach, Kai A1 - Sick, Beate A1 - Dürr, Oliver T1 - Single Shot MC Dropout Approximation T2 - ICML 2020 Workshop on Uncertainty and Ro-bustness in Deep Learnin, July 17, 2020, virtual N2 - Deep neural networks (DNNs) are known for their high prediction performance, especially in perceptual tasks such as object recognition or autonomous driving. Still, DNNs are prone to yield unreliable predictions when encountering completely new situations without indicating their uncertainty. Bayesian variants of DNNs (BDNNs), such as MC dropout BDNNs, do provide uncertainty measures. However, BDNNs are slow during test time because they rely on a sampling approach. Here we present a single shot MC dropout approximation that preserves the advantages of BDNNs without being slower than a DNN. Our approach is to analytically approximate for each layer in a fully connected network the expected value and the variance of the MC dropout signal. We evaluate our approach on different benchmark datasets and a simulated toy example. We demonstrate that our single shot MC dropout approximation resembles the point estimate and the uncertainty estimate of the predictive distribution that is achieved with an MC approach, while being fast enough for real-time deployments of BDNNs. Y1 - 2020 UR - https://arxiv.org/abs/2007.03293 UR - http://www.gatsby.ucl.ac.uk/~balaji/udl2020/accepted-papers/UDL2020-paper-106.pdf SP - 6 S1 - 6 ER - TY - BOOK U1 - Buch A1 - Dürr, Oliver A1 - Sick, Beate T1 - Probabilistic Deep Learning BT - With Python, Keras and TensorFlow Probability N2 - Probabilistic Deep Learning is a hands-on guide to the principles that support neural networks. Learn to improve network performance with the right distribution for different data types, and discover Bayesian variants that can state their own uncertainty to increase accuracy. This book provides easy-to-apply code and uses popular frameworks to keep you focused on practical applications. Y1 - 2020 SN - 978-1-61729-607-9 SB - 978-1-61729-607-9 SP - xviii, 274 S1 - xviii, 274 PB - Manning Publications Company CY - Shelter Island, NY ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Herzog, Lisa A1 - Murina, Elvis A1 - Dürr, Oliver A1 - Wegener, Susanne A1 - Sick, Beate T1 - Integrating uncertainty in deep neural networks for MRI based stroke analysis JF - Medical Image Analysis N2 - At present, the majority of the proposed Deep Learning (DL) methods provide point predictions without quantifying the model's uncertainty. However, a quantification of the reliability of automated image analysis is essential, in particular in medicine when physicians rely on the results for making critical treatment decisions. In this work, we provide an entire framework to diagnose ischemic stroke patients incorporating Bayesian uncertainty into the analysis procedure. We present a Bayesian Convolutional Neural Network (CNN) yielding a probability for a stroke lesion on 2D Magnetic Resonance (MR) images with corresponding uncertainty information about the reliability of the prediction. For patient-level diagnoses, different aggregation methods are proposed and evaluated, which combine the individual image-level predictions. Those methods take advantage of the uncertainty in the image predictions and report model uncertainty at the patient-level. In a cohort of 511 patients, our Bayesian CNN achieved an accuracy of 95.33% at the image-level representing a significant improvement of 2% over a non-Bayesian counterpart. The best patient aggregation method yielded 95.89% of accuracy. Integrating uncertainty information about image predictions in aggregation models resulted in higher uncertainty measures to false patient classifications, which enabled to filter critical patient diagnoses that are supposed to be closer examined by a medical doctor. We therefore recommend using Bayesian approaches not only for improved image-level prediction and uncertainty estimation but also for the detection of uncertain aggregations at the patient-level. KW - Bayesian convolutional neural networks KW - Uncertainty KW - Magnetic resonance imaging KW - Ischemic stroke Y1 - 2020 SN - 1361-8423 SS - 1361-8423 SN - 1361-8415 SS - 1361-8415 U6 - https://dx.doi.org/10.1016/j.media.2020.101790 DO - https://dx.doi.org/10.1016/j.media.2020.101790 IS - Vol. 65, Art. 101790 SP - 21 S1 - 21 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Pearse, Grant D. A1 - Tan, Alan Y.S. A1 - Watt, Michael S. A1 - Franz, Matthias O. A1 - Dash, Jonathan P. T1 - Detecting and mapping tree seedlings in UAV imagery using convolutional neural networks and field-verified data JF - ISPRS Journal of Photogrammetry and Remote Sensing N2 - Mapping of tree seedlings is useful for tasks ranging from monitoring natural succession and regeneration to effective silvicultural management. Development of methods that are both accurate and cost-effective is especially important considering the dramatic increase in tree planting that is required globally to mitigate the impacts of climate change. The combination of high-resolution imagery from unmanned aerial vehicles and object detection by convolutional neural networks (CNNs) is one promising approach. However, unbiased assessments of these models and methods to integrate them into geospatial workflows are lacking. In this study, we present a method for rapid, large-scale mapping of young conifer seedlings using CNNs applied to RGB orthomosaic imagery. Importantly, we provide an unbiased assessment of model performance by using two well-characterised trial sites together containing over 30,000 seedlings to assemble datasets with a high level of completeness. Our results showed CNN-based models trained on two sites detected seedlings with sensitivities of 99.5% and 98.8%. False positives due to tall weeds at one site and naturally regenerating seedlings of the same species led to slightly lower precision of 98.5% and 96.7%. A model trained on examples from both sites had 99.4% sensitivity and precision of 97%, showing applicability across sites. Additional testing showed that the CNN model was able to detect 68.7% of obscured seedlings missed during the initial annotation of the imagery but present in the field data. Finally, we demonstrate the potential to use a form of weakly supervised training and a tile-based processing chain to enhance the accuracy and efficiency of CNNs applied to large, high-resolution orthomosaics. KW - Deep learning KW - Convolutional networks KW - Tree seedlings KW - Unmanned aerial vehicles KW - Forest establishment KW - Object detection Y1 - 2020 SN - 0924-2716 SS - 0924-2716 SN - 1872-8235 SS - 1872-8235 U6 - https://dx.doi.org/10.1016/j.isprsjprs.2020.08.005 DO - https://dx.doi.org/10.1016/j.isprsjprs.2020.08.005 IS - Vol. 168 SP - 156 EP - 169 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Griesser, Dennis A1 - Dold, Daniel A1 - Umlauf, Georg A1 - Franz, Matthias O. T1 - CNN-Based Monocular 3D Ship Detection Using Inverse Perspective T2 - Global Oceans 2020, Oceans Conference and Exposition, October 5th - 30th 2020, virtual KW - Inverse perspective KW - Mask R-CNN KW - 3D ship detection KW - Ship dataset Y1 - 2020 UR - https://globaloceans2020.org/proceedings/session.cfm?sid=11&SG=11 SP - 8 S1 - 8 ER - TY - CHAP U1 - Buchbeitrag A1 - Krekeler, Christian T1 - Formen und Verfahren der Selbstevaluation der Lernenden T2 - Handbuch Methoden im Fremdsprachenunterricht KW - Methodik des Fremdsprachenunterrichts KW - Selbstevaluation Y1 - 2020 SN - 978-3-7727-1228-9 SB - 978-3-7727-1228-9 SP - 486 EP - 489 PB - Klett Kallmeyer CY - Hannover ER - TY - GEN U1 - Studien- und Projektarbeit A1 - Uhl, Fabian A1 - Hügle, Thomas T1 - Arbeitsplatz für Hardware-in-the-loop-Laborversuche N2 - Die Projektaufgabe bestand darin, den aktuellen Laborversuch zu modernisieren, indem die Kommunikation zwischen dem Versuchsaufbau und Laborrechner nicht wie bisher über Wandlerkarten stattfindet, sondern über EtherCAT und TwinCAT 3. Die Installation von TwinCAT 3 mit den zugehörigen Erweiterungen und erforderlichen Programmen stellt sich als sehr umfangreich und schwierig dar, was die Installationsanleitungen zeigen. Außerdem gab es sehr viele Fehlerquellen, die nicht auf Anhieb ersichtlich waren, wie das Aktualisieren der aktuellen MATLAB Version. Ist die Installation abgeschlossen kann die Kommunikation zwischen MATLAB und TwinCAT relativ einfach umgesetzt werden. In der Projektarbeit wurde anfangs dann die Kommunikation mit mehreren Tests überprüft und Optimierungen vorgenommen. So wurde zum Beispiel die Wegbegrenzung angepasst. Schwierigkeiten zeigten sich bei der Bedienung über MATLAB oder beim Abstürzen von MATLAB, da beim Stoppen oder Abstürzen von MATLAB, der zuletzt gesendete Wert immer noch an TwinCAT 3 anliegt und somit der Aktor weiter verfahren würde. Diese sehr gefährliche Situation wäre ein gravierender Nachteil, gegenüber der alten Kommunikation mit einer Wandlerkarte. Um einen sicheren Stopp zu garantieren, wird über ein neues TcCOM Objekt der Matlab-Status mit einem Togglebit überprüft, ändert sich der Wert des Bits nicht mehr, stoppt die Anlage sicher. Um einen Vergleich mit dem bisherigen Masterversuch erhalten zu können, wurde die Strecke mit der neuen Kommunikation untersucht und ein passender Regler dafür auszulegt. Die Auswertung der Impulsantwort sowie der „Spectrum-Analyse“ zeigten beim Vergleich mit den Schnittstellen gleiche Ergebnisse, somit sind die Versuche bei dem Laborversuch ohne Einschränkungen durchführbar. Die Auslegung des Reglers zeigte entgegen den Prognosen der Beckhoff-Experten sehr gute Ergebnisse und die Kommunikation über die Schnittstelle zeigte keine Probleme. Einschränkungen zeigten sich jedoch bei der einzustellenden Abtastzeit, da eine Abtastzeit unter 2ms nicht möglich ist. Zwar kann man eine geringere Abtastzeit einstellen, jedoch zeigt sich bei der Auswertung, dass die Schnittstelle mit Abtastzeiten unter 2ms Probleme aufweist. Die Rechendauer wird deutlich größer und die größere Anzahl an Messpunkte kann nicht richtig verarbeitet werden. Ein Regler kann damit nicht implementiert werden. Die Projektarbeit konnte somit erfolgreich angeschlossen werden und bis auf die aufwendige Installation sind die Erweiterungen von Beckhoff sehr zuverlässig und gut zu bedienen. Die ersten Voruntersuchen waren positiv, somit kann auch an weiteren Laborrechnern eine Umstellung der Schnittstelle in Betracht gezogen werden. N2 - The project work shows how TwinCAT 3 and MATLAB/Simulink are connected in order to achieve an easy-to-use Simulink workflow for laboratory experiments with real mechatronic hardware which ist connected to the PC via Beckhoff I/O modules and EtherCAT. A sampling period of 2 ms results in a reliable real-time data transfer between TwinCAT3 and Simulink. KW - Hardware-in-the-loop KW - TwinCAT KW - Simulink KW - Laboratory experiments with Simulink and real hardware KW - Laborexperimente mit Simulink und echter Hardware Y1 - 2020 SP - 58 S1 - 58 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Thimm, Tatjana T1 - E-destination: the future of e-mobility in the Lake Constance region, Germany JF - Journal of Tourism Futures N2 - This paper aims to focus on the development of a vision for the Lake Constance region, Germany, as an e-destination, i.e. a destination where tourism mobility would be predominantly electric in the future. KW - Scenario analysis KW - Sustainable tourism KW - E-mobility KW - Lake Constance region KW - Mobility turn KW - Tourism mobility Y1 - 2020 UR - https://www.emerald.com/insight/content/doi/10.1108/JTF-10-2019-0116/full/html SN - 2055-5911 SS - 2055-5911 U6 - https://dx.doi.org/10.1108/JTF-10-2019-0116 DO - https://dx.doi.org/10.1108/JTF-10-2019-0116 IS - Vol. ahead-of-print SP - 13 S1 - 13 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Leuschen, Lara A1 - Eitzenberger, Florian A1 - Thimm, Tatjana T1 - Creative industry and cultural tourism destination Lake Constance - a media discourse analysis JF - Via Tourism Review N2 - The following media discourse analysis examines the news media coverage of four regional online newspapers, about the topics “creative industries” and “cultural tourism” at Lake Constance region in the period from 2006 until 2016. The results show that, besides event-relater reporting, there is currently no vibrant media discourse on the topics “creative industries” and “cultural tourism”. Even though the image of the Lake Constance region is heavily influenced by tourism, “cultural tourism” also plays a secondary role when it comes to regional news reporting. Moreover, discourses do not overlap and thus no synergies within the local media discourse are formed. This result is relevant for the regional tourism development, because the cooperation between “creative industries” and “cultural tourism” creates opportunities such as the expansion of the tourism offer and an extension of the tourist season. To activate unused opportunities at the different destinations of the region, a supra-regional visibility of the sector “creative industries” should be developed and the cooperation of the sector with local stakeholders of cultural tourism should be promoted. KW - Media discourse analysis KW - Creative industries KW - Cultural tourism KW - Creative tourism KW - Lake Constance Y1 - 2020 SN - 2259-924X SS - 2259-924X U6 - https://dx.doi.org/https://doi.org/10.4000/viatourism.5321 DO - https://dx.doi.org/https://doi.org/10.4000/viatourism.5321 VL - 17 SP - 19 S1 - 19 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Hutter, Hans-Peter A1 - Darvishy, Alireza A1 - Roth, Stephan A1 - Gäumann, Susanne A1 - Kaspar, Heidi A1 - Thimm, Tatjana A1 - Gaiduk, Maksym A1 - Evans, Sandra A1 - Rosenberg, Martin T1 - Service Design for Accessible Tourism T2 - Universal Access in Human-Computer Interaction : Applications and Practice, HCII 2020, 22nd International Conference on Human-Computer Interaction, 19-24 July 2020, Copenhagen, Denmark, virtual, (Lecture Notes in Computer Science, vol. 12189) N2 - This paper presents the goals, service design approach, and the results of the project “Accessible Tourism around Lake Constance”, which is currently run by different universities, industrial partners and selected hotels in Switzerland, Germany and Austria. In the 1st phase, interviews with different persons with disabilities and elderly persons have been conducted to identify the barriers and pains faced by tourists who want to spend their holidays in the region of Lake Constance as well as possible assistive technologies that help to overcome these barriers. The analysis of the interviews shows that one third of the pains and barriers are due to missing, insufficient, wrong or inaccessible information about the accessibility of the accommodation, surroundings, and points of interests during the planning phase of the holidays. Digital assistive technologies hence play a major role in bridging this information gap. In the 2nd phase so-called Hotel-Living-Labs (HLL) have been established where the identified assistive technologies can be evaluated. Based on these HLLs an overall service for accessible holidays has been designed and developed. In the last phase, this service has been implemented based on the HLLs as well as the identified assistive technologies and is currently field tested with tourists with disabilities from the three participated countries. KW - Accessible Tourism KW - Service Design Y1 - 2020 SN - 978-3-030-49108-6 SB - 978-3-030-49108-6 SN - 978-3-030-49107-9 SB - 978-3-030-49107-9 U6 - https://dx.doi.org/10.1007/978-3-030-49108-6_29 DO - https://dx.doi.org/10.1007/978-3-030-49108-6_29 N1 - Volltextzugriff für Angehörige der Hochschule Konstanz im Campusnetz möglich. SP - 409 EP - 419 PB - Springer CY - Cham ER - TY - GEN U1 - Sonstiges ED - Friedrich, Volker T1 - Philosophie & Rhetorik BT - Ein Quarantäne-Blog in Krisenzeiten Y1 - 2020 UR - https://philosophie-und-rhetorik.de ER - TY - BOOK U1 - Buch ED - Fritz, Oliver ED - Hovestadt, Ludger ED - Hirschberg, Urs T1 - Atlas of digital architecture BT - terminology, concepts, methods, tools, examples, phenomena N2 - Digital technology and architecture have become inseparable, with new approaches and methodologies not just affecting the workflows and practice of architects but shaping the very character of architecture. This compendious work offers a wide-ranging orientation to the new landscape with its opportunities, its challenges, and its vast potential. Y1 - 2020 SN - 978-3-0356-1990-4 SB - 978-3-0356-1990-4 SN - 978-3-0356-2011-5 SB - 978-3-0356-2011-5 U6 - https://dx.doi.org/10.1515/9783035620115 DO - https://dx.doi.org/10.1515/9783035620115 N1 - Volltextzugriff für Angehörige der Hochschule Konstanz im Campusnetz möglich. SP - 760 S1 - 760 PB - Birkhäuser CY - Basel ER - TY - CHAP U1 - Buchbeitrag A1 - Girke, Felix T1 - Shared Field, Divided Field BT - Expectations of an Anthropological Couple in Southeast Asia T2 - Being a parent in the field : implications and challenges of accompanied fieldwork N2 - This chapter discusses the disciplinary history of couples who go on fieldwork together, and substantiates the developments in anthropology by the example of the author's family's research in urban Myanmar. KW - Feldforschung KW - Familie KW - Myanmar KW - Ethnologie KW - Kulturanthropologie Y1 - 2020 UN - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bsz:kon4-opus4-26770 SN - 978-3-8376-4831-7 SB - 978-3-8376-4831-7 U6 - https://dx.doi.org/10.14361/9783839448311-014 DO - https://dx.doi.org/10.14361/9783839448311-014 SP - 259 EP - 278 PB - transcript CY - Bielefeld ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Thimm, Tatjana A1 - Karlaganis, Corinne T1 - A conceptual framework for indigenous ecotourism projects – a case study in Wayanad, Kerala, India JF - Journal of Heritage Tourism N2 - This paper analyses indigenous ecotourism in the Indian district of Wayanad, Kerala, using a conceptual framework based on a PATA 2015 study on indigenous tourism that includes the criteria: human rights, participation, business and ecology. Detailed indicator sets for each criterion are applied to a case study of the Priyadarshini Tea Environs with a qualitative research approach addressing stakeholders from the public sector, non-governmental organisations, academia, tour operators and communities including Adivasi and non-Adivasi. In-depth interviews were supported by participant and non-participant observations. The authors adapted this framework to the needs of the case study and consider that this modified version is a useful tool for academics and practitioners wishing to evaluate and develop indigenous ecotourism projects. The results show that the Adivasi involved in the Priyadarshini Tea Environs project benefit from indigenous ecotourism. But they could profit more if they had more involvement in and control of the whole tourism value chain. KW - Ecotourism KW - Indigenous tourism KW - Adivasi KW - Kerala KW - South India KW - Framework for indigenous tourism Y1 - 2020 SN - 1743-873X SS - 1743-873X U6 - https://dx.doi.org/10.1080/1743873X.2020.1746793 DO - https://dx.doi.org/10.1080/1743873X.2020.1746793 VL - 15 IS - 3 SP - 294 EP - 311 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Leuschen, Lara A1 - Thimm, Tatjana T1 - Landscape stereotypes and potential of creative economic narratives in the tourism marketing of Lake Constance as a destination JF - Via Tourism Review N2 - The Lake Constance region is due to its scenic attractiveness one of the most visited destinations in German-speaking countries. Scenic attractiveness as well as so-called landscape stereotypes also play a decisive role in tourism marketing. Tour operators reproduce supra-individual landscape concepts and establish mental geographies that ultimately influence the choice of destinations. A growing trend in tourism is the emergence of creative narratives in tourism marketing and tourism offers induced by creative companies. By means of a discourse-analytical investigation, whose theoretical and conceptual frame of reference is the hegemony and discourse theory of Laclau and Mouffe (1985), recurring landscape stereotypes are identified in tourist promotional material for the destination Bodensee. Based on these results as well as expert interviews with regional tourism stakeholders, a discussion of the creative economic potential for regional tourism marketing will take place. The investigation shows that these potentials are currently not being exhausted. At the same time, creative tourism can help a rural region, such as Lake Constance, to position itself as an alternative to city tourism, while at the same time addressing the lucrative target group 60plus. KW - Landscape stereotypes KW - Imaginary geographies KW - Cultural and creative industries, KW - Creative tourism KW - Cultural tourism KW - Tourism marketing KW - Regional marketing KW - Lake Constance Y1 - 2019 SN - 2259-924X SS - 2259-924X U6 - https://dx.doi.org/10.4000/viatourism.4731 DO - https://dx.doi.org/10.4000/viatourism.4731 VL - 16 SP - 24 S1 - 24 ER - TY - GEN U1 - Sonstiges A1 - Schmidt, Karsten T1 - Integres Wirtschaftsrecht? - Pro und Kontra T2 - Return - Magazin für Transformation und Turnaround N2 - Diskurs und Debatte um das neue Verbandssanktionengesetz (VerSanG). Pro und Kontra. Professor Stephan Grüninger betitelt Pro mit „Der Anreiz muss im Vordergrund stehen“. KW - Verbandssanktionengesetz KW - VerSanG KW - Compliance-Management Y1 - 2020 UR - https://www.springerprofessional.de/en/integres-wirtschaftsrecht/18485944 SN - 2520-8187 SS - 2520-8187 IS - 5 SP - 50 EP - 51 PB - Springer Gabler, Springer Fachmedien Wiesbaden GmbH CY - Wiesbaden ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Hermann, Matthias A1 - Hake, Frederic A1 - Alkhatib, Hamza A1 - Hesse, Christian A1 - Holste, Karsten A1 - Umlauf, Georg A1 - Kermarrec, Gaël A1 - Neumann, Ingo T1 - Damage Detection for Port Infrastructure by Means of Machine-Learning-Algorithms T2 - Smart surveyors for land and water management, FIG Working Week 2020, Amsterdam, the Netherlands, 10–14 May 2020 N2 - The ageing infrastructure in ports requires regular inspection. This inspection is currently carried out manually by divers who sense by hand the entire underwater infrastructure. This process is cost-intensive as it involves a lot of time and human resources. To overcome these difficulties, we propose to scan the above and underwater port structure with a Multi-SensorSystem, and -by a fully automated processto classify the obtained point cloud into damaged and undamaged zones. We make use of simulated training data to test our approach since not enough training data with corresponding class labels are available yet. To that aim, we build a rasterised heightfield of a point cloud of a sheet pile wall by cutting it into verticall slices. The distance from each slice to the corresponding line generates the heightfield. This latter is propagated through a convolutional neural network which detects anomalies. We use the VGG19 Deep Neural Network model pretrained on natural images. This neural network has 19 layers and it is often used for image recognition tasks. We showed that our approach can achieve a fully automated, reproducible, quality-controlled damage detection which is able to analyse the whole structure instead of the sample wise manual method with divers. The mean true positive rate is 0.98 which means that we detected 98 % of the damages in the simulated environment. KW - Damage Detection KW - Multibeam echosounder KW - Laser scanning KW - Machine-Learning KW - Infrastructure Y1 - 2020 UR - https://fig.net/resources/proceedings/fig_proceedings/fig2020/papers/ts08b/TS08B_hake_alkhatib_et_al_10441.pdf SN - 978-87-92853-93-6 SB - 978-87-92853-93-6 SP - 14 S1 - 14 PB - International Federation of Surveyors, FIG CY - Copenhagen ER - TY - GEN U1 - Sonstiges A1 - Wischer, Anja A1 - Grüninger, Stephan T1 - Integrität und Compliance: Hemmschuh oder Erfolgsgarant? T2 - HTWG Online-Magazin N2 - Ethik in der Wirtschaft ist das Forschungsthema von Prof. Dr. Stephan Grüninger. Im Interview spricht er über Unternehmensverantwortung und macht auf eine Veranstaltungsreihe neugierig. KW - Compliance KW - Integritätsmanagement KW - Unternehmensverantwortung KW - Wirtschaftsethik KW - Unternehmensethik KW - Interview Y1 - 2020 UR - https://www.htwg-konstanz.de/hochschule/magazin/integritaet-und-compliance-hemmschuh-oder-erfolgsgarant/ IS - Oct 2020 PB - Konstanz CY - HTWG Hochschule Konstanz ER - TY - GEN U1 - Sonstiges A1 - Putzer, Klaus A1 - Grüninger, Stephan T1 - „Wir müssen herausfinden, worauf es ankommt“ BT - Interview mit Prof. Dr. rer. pol. Stephan Grüninger T2 - Compliance Praxis N2 - Entwickelt Compliance in Organisationen ein gefährliches Eigenleben? Ist Wirksamkeitsmessung eine Schimäre? Worauf schauen Strafverfolger bei Delinquenten tatsächlich und wie müssen ­Compliance Officer gestrickt sein? ­Wertemanagement-Pionier Prof. Stephan Grüninger im Jubiläums-Gespräch. KW - Compliance KW - Compliance-Management KW - Wertemanagement KW - Wirksamkeit KW - Glaubwürdigkeit KW - Interview Y1 - 2020 UR - https://www.compliance-praxis.at/Themen/10JahreCompliancePraxis/Wir_muessen_herausfinden-_worauf_es_ankommt-.html IS - 4 SP - 8 EP - 8 PB - LexisNexis-Verlag ARD Orac GmbH & Co KG CY - Wien ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Hoher, Patrick A1 - Baur, Tim A1 - Wirtensohn, Stefan A1 - Reuter, Johannes T1 - A Detection Driven Adaptive Birth Density for the Labeled Multi-Bernoulli Filter T2 - 23rd International Conference on Information Fusion (FUSION), 6-9 July 2020, Rustenburg, South Africa, virtual N2 - Modeling a suitable birth density is a challenge when using Bernoulli filters such as the Labeled Multi-Bernoulli (LMB) filter. The birth density of newborn targets is unknown in most applications, but must be given as a prior to the filter. Usually the birth density stays unchanged or is designed based on the measurements from previous time steps. In this paper, we assume that the true initial state of new objects is normally distributed. The expected value and covariance of the underlying density are unknown parameters. Using the estimated multi-object state of the LMB and the Rauch-Tung-Striebel (RTS) recursion, these parameters are recursively estimated and adapted after a target is detected. The main contribution of this paper is an algorithm to estimate the parameters of the birth density and its integration into the LMB framework. Monte Carlo simulations are used to evaluate the detection driven adaptive birth density in two scenarios. The approach can also be applied to filters that are able to estimate trajectories. KW - Data Fusion KW - Multi Bernoulli Filter KW - Birth Density KW - Adaptive KW - Rauch-Tung-Striebel Recursion Y1 - 2020 SN - 978-0-578-64709-8 SS - 978-0-578-64709-8 U6 - https://dx.doi.org/10.23919/FUSION45008.2020.9190532 DO - https://dx.doi.org/10.23919/FUSION45008.2020.9190532 N1 - Volltextzugriff für Angehörige der Hochschule Konstanz via Datenbank IEEE Xplore möglich SP - 8 S1 - 8 PB - IEEE ER - TY - RPRT U1 - Forschungsbericht A1 - Haase, Oliver T1 - Ergebnisbericht zu meinem Forschungssemester im Sommersemester 2014 an der Universität Lund, Schweden Y2 - 2021 SP - 7 S1 - 7 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Huber, Melanie A1 - Rentrop, Christopher A1 - Zimmermann, Stephan T1 - IT-Integration in Zeiten von Digitalisierung – (k)ein alter Hut? JF - HMD Praxis der Wirtschaftsinformatik N2 - Durch die zunehmende Vernetzung und den Anstieg von eingesetzter Hard- und Software hat sich die Komplexität der Unternehmensarchitektur von Unternehmen über die Jahre stetig erhöht. Das Aufkommen nutzerfreundlicher Informationstechnologie (IT)-Lösungen befähigt außerdem Fachbereiche, IT innovativ einzusetzen. Dies erhöht die Heterogenität und damit nochmals die Komplexität der Unternehmensarchitektur. Darüber hinaus treibt dieser IT-Einsatz die Digitalisierung in den Unternehmen maßgeblich voran. Dies wirft die Frage auf, ob Unternehmen überhaupt noch eine Relevanz in der Reduktion der Komplexität durch IT-Integration sehen oder ob dies vor dem Hintergrund der Digitalisierung schon ein alter Hut ist. Experteninterviews und eine qualitative Datenanalyse zeigen, dass IT-Integration und Digitalisierung keine disjunkten Phänomene sind, sondern sich gegenseitig beeinflussen. Die Ergebnisse betonen, wie unterschiedlich der Begriff aufgefasst werden kann und dass die einheitliche Nutzung damit essenziell ist. Darüber hinaus zeigen sie, dass Digitalisierung einerseits Treiber der IT-Integration ist, andererseits aber auch die Möglichkeiten zur Umsetzung verändert. Dabei ist die Integrationsentscheidung durch die Vielzahl an Vor- und Nachteile komplex. Fachbereichs-IT ist selten explizites Ziel von IT-Integrationsprojekten. Der Beitrag zeigt den wissenschaftlichen Forschungsbedarf in neuen technologischen Möglichkeiten zur IT-Integration und in der Balance von Flexibilität und IT-Integration in der Unternehmensarchitektur. Er beleuchtet, dass eine gemeinsame Sprache die Basis für IT-Integrationsprojekte ist und dass eine Kultur, in der Fachbereiche aktiv an IT-Integrationsentscheidungen teilhaben, das Ziel eines jeden Unternehmens sein sollte. Insgesamt zeigen die Analysen, dass IT-Integration noch lange kein alter Hut, sondern, im Gegenteil, brandaktuell ist. KW - IT-Integration KW - Digitalisierung KW - Experteninterview Y1 - 2020 SN - 1436-3011 SS - 1436-3011 SN - 2198-2775 SS - 2198-2775 U6 - https://dx.doi.org/10.1365/s40702-020-00622-x DO - https://dx.doi.org/10.1365/s40702-020-00622-x SP - 19 S1 - 19 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Deistler, Nico A1 - Rentrop, Christopher T1 - IT-Compliance in KMU – State of the art JF - HMD Praxis der Wirtschaftinformatik N2 - Kleine und mittelständische Unternehmen (KMU) sind bekannt für ihre Innovationskraft und bilden das Rückgrat der deutschen Wirtschaft. Wie Studien zeigen sind sie in Bezug auf Compliance-Maßnahmen im Vergleich zu kapitalmarktorientierten Unternehmen jedoch im Rückstand. Eine gesonderte Betrachtung der IT-Compliance erfolgt dabei in den Studien in der Regel nicht. Auch wenn zu den Gründen und Motiven fehlender IT-Compliance-Strukturen in KMU kaum Forschungsergebnisse vorliegen, zeigen doch die vielen Publikationen, die sich mit Teilaspekten von Compliance und KMU beschäftigen, dass Handlungsbedarf besteht. Insbesondere die aktuellen Veränderungen unter dem Stichwort Digitalisierung deuten auf eine gesteigerte Bedeutung von IT-Compliance-Maßnahmen vor allem in mittelständischen Unternehmen. In dieser Arbeit sollen daher mithilfe einer Literaturrecherche die aktuell behandelten Themen in Bezug auf IT-Compliance und KMU analysiert sowie aktuelle Themenschwerpunkte herausgearbeitet werden. KW - IT-Compliance KW - Compliance KW - Mittelständische Unternehmen KW - KMU KW - Literaturrecherche Y1 - 2020 SN - 1436-3011 SS - 1436-3011 SN - 2198-2775 SS - 2198-2775 U6 - https://dx.doi.org/10.1365/s40702-020-00612-z DO - https://dx.doi.org/10.1365/s40702-020-00612-z VL - Vol. 57 IS - 5 SP - 1047 EP - 1057 ER - TY - THES U1 - Dissertation / Habilitation A1 - Alseidi, Rola T1 - Matrices which are Sign-Regular of a Given Order N2 - In this thesis, the recognition problem and the properties of eigenvalues and eigenvectors of matrices which are strictly sign-regular of a given order, i.e., matrices whose minors of a given order have the same strict sign, are considered. The results are extended to matrices which are sign-regular of a given order, i.e., matrices whose minors of a given order have the same sign or are allowed to vanish. As a generalization, a new type of matrices called oscillatory of a specific order, are introduced. Furthermore, the properties for this type are investigated. Also, same applications to dynamic systems are given. N2 - In dieser Dissertation wird die Identifikation und die Eigenwerte und -vektoren von Matrizen untersucht, die strikt zeichenregulär von gegebener Ordnung sind. Dies sind Matrizen, deren Minoren gegebener Ordnung sämtlich das gleiche strikte Vorzeichen besitzen. Die Ergebnisse werden auf Matrizen erweitert, die zeichenregulär von gegebener Ordnung sind; dies sind Matrizen, deren Minoren gegebener Ordnung entweder sämtlich nichtnegativ oder sämtlich nichtpositiv sind. Ferner wird eine neue Klasse von Matrzen, genannt Oszillationsmatrizen von einer gegebenen Ordnung, eingeführt und deren Eigenschaften untersucht. Schließlich werden die Ergebnisse auf dynamische Systeme angewendet. KW - Sign-regular matrix KW - Strictly sign-regular matrix Y2 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bsz:352-2-1sk4wj0qjhcfe3 UN - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bsz:352-2-1sk4wj0qjhcfe3 SP - 99 S1 - 99 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Titi, Jihad A1 - Garloff, Jürgen T1 - Symbolic-numeric computation of the Bernstein coefficients of a polynomial from those of one of its partial derivatives and of the product of two polynomials T2 - Computer Algebra in Scientific Computing, 22nd International Workshop, CASC 2020, September 14–18, 2020, Linz, Austria, Proceedings N2 - The expansion of a given multivariate polynomial into Bernstein polynomials is considered. Matrix methods for the calculation of the Bernstein expansion of the product of two polynomials and of the Bernstein expansion of a polynomial from the expansion of one of its partial derivatives are provided which allow also a symbolic computation. KW - Multivariate polynomial KW - Bernstein polynomial KW - Bernstein coefficient Y1 - 2020 SN - 978-3-030-60026-6 SB - 978-3-030-60026-6 U6 - https://dx.doi.org/10.1007/978-3-030-60026-6_34 DO - https://dx.doi.org/10.1007/978-3-030-60026-6_34 N1 - Volltextzugriff für Angehörige im Campusnetz der Hochschule Konstanz möglich. SP - 583 EP - 599 PB - Springer CY - Cham ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Adm, Mohammad A1 - Al Muhtaseb, Khawla A1 - Ghani, Ayed Abedel A1 - Garloff, Jürgen T1 - Relaxing the nonsingularity assumption for intervals of totally nonnegative matrices JF - Electronic Journal of Linear Algebra (ELA) N2 - Totally nonnegative matrices, i.e., matrices having all their minors nonnegative, and matrix intervals with respect to the checkerboard partial order are considered. It is proven that if the two bound matrices of such a matrix interval are totally nonnegative and satisfy certain conditions, then all matrices from this interval are also totally nonnegative and satisfy the same conditions. KW - Matrix interval KW - Checkerboard partial order KW - Totally nonnegative matrix KW - Descending rank conditions KW - Cauchon algorithm Y1 - 2020 SN - 1081-3810 SS - 1081-3810 U6 - https://dx.doi.org/10.13001/ela.2020.5015 DO - https://dx.doi.org/10.13001/ela.2020.5015 VL - Vol. 36 SP - 106 EP - 123 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Al-Saafin, Doaa A1 - Garloff, Jürgen T1 - Sufficient conditions for symmetric matrices to have exactly one positive eigenvalue JF - Special Matrices N2 - Let A = [a_ij] be a real symmetric matrix. If f:(0,oo)-->[0,oo) is a Bernstein function, a sufficient condition for the matrix [f(a_ij)] to have only one positive eigenvalue is presented. By using this result, new results for a symmetric matrix with exactly one positive eigenvalue, e.g., properties of its Hadamard powers, are derived. KW - Bernstein function KW - Hadamard power KW - Hadamard inverse KW - Infinitely divisible matrix KW - Conditionally negative semidefinite matrix Y1 - 2020 SN - 2300-7451 SS - 2300-7451 U6 - https://dx.doi.org/10.1515/spma-2020-0009 DO - https://dx.doi.org/10.1515/spma-2020-0009 VL - 8 IS - 1 SP - 98 EP - 103 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Zinsmaier, Sandra A1 - Langweg, Hanno A1 - Waldvogel, Marcel T1 - A Practical Approach to Stakeholder-driven Determination of Security Requirements based on the GDPR and Common Criteria T2 - ICISSP 2020, Proceedings of the 6th International Conference on Information Systems Security and Privacy, February 25-27, 2020, Valletta, Malta N2 - We propose and apply a requirements engineering approach that focuses on security and privacy properties and takes into account various stakeholder interests. The proposed methodology facilitates the integration of security and privacy by design into the requirements engineering process. Thus, specific, detailed security and privacy requirements can be implemented from the very beginning of a software project. The method is applied to an exemplary application scenario in the logistics industry. The approach includes the application of threat and risk rating methodologies, a technique to derive technical requirements from legal texts, as well as a matching process to avoid duplication and accumulate all essential requirements. KW - Common Criteria KW - GDPR KW - Privacy by Design KW - Requirements Engineering KW - Security by Design Y1 - 2020 SN - 978-989-758-399-5 SB - 978-989-758-399-5 U6 - https://dx.doi.org/10.5220/0008960604730480 DO - https://dx.doi.org/10.5220/0008960604730480 IS - Vol. 1 SP - 473 EP - 480 PB - SciTePress ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Schuckert, Felix A1 - Katt, Basel A1 - Langweg, Hanno T1 - Difficult XSS Code Patterns for Static Code Analysis Tools T2 - Computer Security - ESORICS 2019 International Workshops, IOSec, MSTEC, and FINSEC Luxembourg City, Luxembourg, September 26-27, 2019 N2 - We present source code patterns that are difficult for modern static code analysis tools. Our study comprises 50 different open source projects in both a vulnerable and a fixed version for XSS vulnerabilities reported with CVE IDs over a period of seven years. We used three commercial and two open source static code analysis tools. Based on the reported vulnerabilities we discovered code patterns that appear to be difficult to classify by static analysis. The results show that code analysis tools are helpful, but still have problems with specific source code patterns. These patterns should be a focus in training for developers. Y1 - 2020 SN - 978-3-030-42050-5 SB - 978-3-030-42050-5 SN - 978-3-030-42051-2 SB - 978-3-030-42051-2 U6 - https://dx.doi.org/10.1007/978-3-030-42051-2_9 DO - https://dx.doi.org/10.1007/978-3-030-42051-2_9 N1 - Zugriff auf den Volltext im Campusnetz der Hochschule Konstanz möglich. SP - 123 EP - 139 PB - Springer CY - Cham ER - TY - CHAP U1 - Buchbeitrag A1 - Sobotta, Richard T1 - Lean Digitalization BT - Durchlaufzeitenoptimierung in administrativen Bereichen durch Implementierung eines Digital Process Twins in der Auftragsplanung und -steuerung T2 - Smart Factory KW - Digitalisierung KW - Industrie 4.0 KW - Lean Management Y1 - 2020 SN - 978-3-17-036468-4 SB - 978-3-17-036468-4 SP - 36 EP - 60 PB - Kohlhammer CY - Stuttgart ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Krekeler, Christian T1 - Schreiben im Studium BT - Eine korpuslinguistische Untersuchung zum Sprachgebrauch in den Studiengängen Maschinenbau und Betriebswirtschaft JF - Zeitschrift für Interkulturellen Fremdsprachenunterricht N2 - Sollte das wissenschaftliche Schreiben als allgemeine Wissenschaftssprache vermittelt werden oder sollten die sprachlichen Anforderungen in den jeweiligen Disziplinen berücksichtigt werden? Die Antwort auf diese Frage hängt auch davon ab, wie stark sich die Wissenschaftssprachen unterscheiden. In der vorliegenden Studie wurden wissenschaftssprachliche Besonderheiten anhand zweier Korpora untersucht, die deutschsprachige Dissertationen der Fächer Betriebswirtschaftslehre (BWL) bzw. Maschinenbau (MB) umfassten und in denen der Gebrauch von Mehrworteinheiten (z.B. im vergleich zu den) verglichen wurde. Die Untersuchung verdeutlicht den unterschiedlichen Gebrauch der Mehrworteinheiten zwischen den Disziplinen: Nur vierzehn der 50 häufigsten Mehrworteinheiten wurden in beiden Korpora genutzt. Die Ergebnisse werden mit Blick auf die Vermittlung des wissenschaftlichen Schreibens erörtert. Es werden Überlegungen zur Weiter­entwicklung der Methode angestellt und es wird diskutiert, wie die Korpuslinguistik die Schreibvermittlung im Studium unterstützen könnte. N2 - Should academic writing courses for international students be taught across the curriculum or in the disciplines? The response will vary depending on the extent to which language is used in the academic disciplines. In this study, the use of lexical bundles in dissertations from business studies and mechanical engineering written in German was investigated using a similar methodology to other corpus-based research. The findings suggest that lexical bundles vary across disciplines. Only fourteen of the fifty most frequent lexical bundles were used in both disciplines. The results are discussed with regard to a discipline-specific teaching of academic writing. It concludes with suggestions on how the methodology can be further developed and on how corpus linguistics can inform the teaching of academic writing. KW - Wissenschaftssprache KW - Vermittlung des wissenschaftlichen Schreibens KW - Mehrworteinheiten Y1 - 2020 UR - https://tujournals.ulb.tu-darmstadt.de/index.php/zif/article/view/1093 SN - 1205-6545 SS - 1205-6545 VL - 25 IS - 2 SP - 207 EP - 235 ER - TY - GEN U1 - Sonstiges A1 - Krekeler, Christian T1 - Rezension von: Fandrych, Christian; Thurmair, Maria: Grammatik im Fach Deutsch als Fremd- und Zweitsprache - Grundlagen und Vermittlung; Berlin: Erich Schmidt Verlag, 2018 T2 - Informationen Deutsch als Fremdsprache(Info DaF) KW - Grammatik KW - Rezension Y1 - 2019 SN - 2511-0853 SS - 2511-0853 SN - 0724-9616 SS - 0724-9616 U6 - https://dx.doi.org/10.1515/infodaf-2019-0035 DO - https://dx.doi.org/10.1515/infodaf-2019-0035 N1 - Volltextzugriff für Angehörige der Hochschule Konstanz im Campusnetz möglich. VL - 46 IS - 3-4 SP - 482 EP - 485 ER - TY - CHAP U1 - Buchbeitrag A1 - Krekeler, Christian T1 - Informelle Testverfahren für bildungssprachliche Kompetenzen T2 - Testen bildungssprachlicher Kompetenzen und akademischer Sprachkompetenzen : Zugänge für Schule und Hochschule (Language testing and evaluation ; volume 43) N2 - Which testing formats are most appropriate for assessing academic language skills? Christian Krekeler addresses this question for informal language assessment in the classroom. In the first part of this chapter discrete items, isolated tests of writing, and integrated tests, three formats which are frequently used in standardised assessment, are investigated and their usefulness for classroom assessment, where diagnosis, achievement and learning are important test functions, is discussed. Because academic language use is cognitively demanding, it is argued that assessment of academic language skills should include authentic and complex tasks as well as subject specific content. The resulting tensions between complex, authentic and context sensitive tasks and the requirements of language assessment methodology are discussed in the second part of the chapter. KW - Bildungssprache KW - Testverfahren KW - Projektaufgaben Y1 - 2020 SN - 978-3-631-81837-4 SB - 978-3-631-81837-4 SP - 241 EP - 262 PB - Peter Lang CY - Berlin ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Beutel, Jörg T1 - Analysing Fuel Subsidy and Taxation Reform with Input–Output Data JF - World Trade Review / Special Issue S1: The Trade Impacts of Fossil Fuel Subsidies N2 - For a long time, the use of intermediate products in production has been growing more rapidly in most countries than domestic production. This is a strong indication of more interdependency in production. The main purpose of input-output analysis is to study the interdependency of industries in an economy. Often the term interindustry analysis is also used. Therefore, the exchange of intermediate products is a key issue of input-output analysis. We will use input–output data for this study that the author prepared for the new ‘Handbook on Supply, Use and Input–Output Tables with Extensions and Applications’ of the United Nations. The supply use and input–output tables contain separate valuation matrices for trade margins, transport margins, value added tax, other taxes on products and subsidies on products. For the study, two input–output models were developed to evaluate the impact of fuel subsidy and taxation reform on output, gross domestic product, inflation and trade. Six scenarios are discussed covering different aspects of the reform. KW - Fuel subsidy Y1 - 2020 SN - 1474-7456 SS - 1474-7456 SN - 1475-3138 SS - 1475-3138 U6 - https://dx.doi.org/10.1017/S1474745620000282 DO - https://dx.doi.org/10.1017/S1474745620000282 VL - Vol. 19 IS - Special Issue S1 SP - s62 EP - s87 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Biagetti, Giorgio A1 - Crippa, Paolo A1 - Falaschetti, Laura A1 - Focante, Edoardo A1 - Martínez Madrid, Natividad A1 - Seepold, Ralf A1 - Turchetti, Claudio T1 - Machine Learning and Data Fusion Techniques Applied to Physical Activity Classification Using Photoplethysmographic and Accelerometric Signals T2 - 24rd International Conference on Knowledge-Based and Intelligent Information & Engineering Systems (KES2020), 16 - 18 September 2020, Verona, Italy, virtual; (Procedia Computer Science) N2 - The evaluation of the effectiveness of different machine learning algorithms on a publicly available database of signals derived from wearable devices is presented with the goal of optimizing human activity recognition and classification. Among the wide number of body signals we choose a couple of signals, namely photoplethysmographic (optically detected subcutaneous blood volume) and tri-axis acceleration signals that are easy to be simultaneously acquired using commercial widespread devices (e.g. smartwatches) as well as custom wearable wireless devices designed for sport, healthcare, or clinical purposes. To this end, two widely used algorithms (decision tree and k-nearest neighbor) were tested, and their performance were compared to two new recent algorithms (particle Bernstein and a Monte Carlo-based regression) both in terms of accuracy and processing time. A data preprocessing phase was also considered to improve the performance of the machine learning procedures, in order to reduce the problem size and a detailed analysis of the compression strategy and results is also presented. KW - Machine learning KW - Photoplethysmography KW - Data fusion KW - PPG Y1 - 2020 SN - 1877-0509 SS - 1877-0509 U6 - https://dx.doi.org/10.1016/j.procs.2020.09.178 DO - https://dx.doi.org/10.1016/j.procs.2020.09.178 VL - 176 SP - 3103 EP - 3111 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Gaiduk, Maksym A1 - Seepold, Ralf A1 - Ortega, Juan Antonio A1 - Martínez Madrid, Natividad T1 - Comparison of sleep characteristics measurements BT - a case study with a population aged 65 and above T2 - 24rd International Conference on Knowledge-Based and Intelligent Information & Engineering Systems (KES2020), 16 - 18 September 2020, Verona, Italy, virtual; (Procedia Computer Science) N2 - Good sleep is crucial for a healthy life of every person. Unfortunately, its quality often decreases with aging. A common approach to measuring the sleep characteristics is based on interviews with the subjects or letting them fill in a daily questionnaire and afterward evaluating the obtained data. However, this method has time and personal costs for the interviewer and evaluator of responses. Therefore, it would be important to execute the collection and evaluation of sleep characteristics automatically. To do that, it is necessary to investigate the level of agreement between measurements performed in a traditional way using questionnaires and measurements obtained using electronic monitoring devices. The study presented in this manuscript performs this investigation, comparing such sleep characteristics as "time going to bed", "total time in bed", "total sleep time" and "sleep efficiency". A total number of 106 night records of elderly persons (aged 65+) were analyzed. The results achieved so far reveal the fact that the degree of agreement between the two measurement methods varies substantially for different characteristics, from 31 minutes of mean difference for "time going to bed" to 77 minutes for "total sleep time". For this reason, a direct exchange of objective and subjective measuring methods is currently not possible. KW - Sleep study KW - Sleep quality KW - PSQI KW - Sleep efficiency Y1 - 2020 SN - 1877-0509 SS - 1877-0509 U6 - https://dx.doi.org/10.1016/j.procs.2020.09.297 DO - https://dx.doi.org/10.1016/j.procs.2020.09.297 VL - 176 SP - 2341 EP - 2349 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Gaiduk, Maksym A1 - Wehrle, Dennis A1 - Seepold, Ralf A1 - Ortega, Juan Antonio T1 - Non-obtrusive system for overnight respiration and heartbeat tracking T2 - 24rd International Conference on Knowledge-Based and Intelligent Information & Engineering Systems (KES2020), 16 - 18 September 2020, Verona, Italy, virtual; (Procedia Computer Science) N2 - Polysomnography is a gold standard for a sleep study, and it provides very accurate results, but its cost (both personnel and material) are quite high. Therefore, the development of a low-cost system for overnight breathing and heartbeat monitoring, which provides more comfort while recording the data, is a well-motivated challenge. The system proposed in this manuscript is based on the usage of resistive pressure sensors installed under the mattress. These sensors can measure slight pressure changes provoked during breathing and heartbeat. The captured signal requires advanced processing, like applying filters and amplifiers before the analog signal is ready for the next step. Then, the output signal is digitalized and further processed by an algorithm that performs a custom filtering before it can recognize breathing and heart rate in real-time. The result can be directly visualized. Furthermore, a CSV file is created containing the raw data, timestamps, and unique IDs to facilitate further processing. The achieved results are promising, and the average deviation from a reference device is about 4bpm. KW - Biosignal analysis KW - Sleep medicine KW - Heart rate KW - Breathing Y1 - 2020 SN - 1877-0509 SS - 1877-0509 U6 - https://dx.doi.org/10.1016/j.procs.2020.09.282 DO - https://dx.doi.org/10.1016/j.procs.2020.09.282 VL - 176 SP - 2746 EP - 2755 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Scherz, Wilhelm Daniel A1 - Baun, Jannik A1 - Seepold, Ralf A1 - Martínez Madrid, Natividad A1 - Ortega, Juan Antonio T1 - A portable ECG for recording and flexible development of algorithms and stress detection T2 - 24rd International Conference on Knowledge-Based and Intelligent Information & Engineering Systems (KES2020), 16 - 18 September 2020, Verona, Italy, virtual; (Procedia Computer Science) N2 - Cardiovascular diseases are directly or indirectly responsible for up to 38.5% of all deaths in Germany and thus represent the most frequent cause of death. At present, heart diseases are mainly discovered by chance during routine visits to the doctor or when acute symptoms occur. However, there is no practical method to proactively detect diseases or abnormalities of the heart in the daily environment and to take preventive measures for the person concerned. Long-term ECG devices, as currently used by physicians, are simply too expensive, impractical, and not widely available for everyday use. This work aims to develop an ECG device suitable for everyday use that can be worn directly on the body. For this purpose, an already existing hardware platform will be analyzed, and the corresponding potential for improvement will be identified. A precise picture of the existing data quality is obtained by metrological examination, and corresponding requirements are defined. Based on these identified optimization potentials, a new ECG device is developed. The revised ECG device is characterized by a high integration density and combines all components directly on one board except the battery and the ECG electrodes. The compact design allows the device to be attached directly to the chest. An integrated microcontroller allows digital signal processing without the need for an additional computer. Central features of the evaluation are a peak detection for detecting R-peaks and a calculation of the current heart rate based on the RR interval. To ensure the validity of the detected R-peaks, a model of the anatomical conditions is used. Thus, unrealistic RR-intervals can be excluded. The wireless interface allows continuous transmission of the calculated heart rate. Following the development of hardware and software, the results are verified, and appropriate conclusions about the data quality are drawn. As a result, a very compact and wearable ECG device with different wireless technologies, data storage, and evaluation of RR intervals was developed. Some tests yelled runtimes up to 24 hours with wireless Lan activated and streaming. KW - ECG KW - Biovital signal KW - Signal processing KW - Stress detection Y1 - 2020 SN - 1877-0509 SS - 1877-0509 U6 - https://dx.doi.org/10.1016/j.procs.2020.09.265 DO - https://dx.doi.org/10.1016/j.procs.2020.09.265 VL - 176 SP - 2886 EP - 2893 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Scherz, Wilhelm Daniel A1 - Corcoba Magaña, Victor A1 - Seepold, Ralf A1 - Martínez Madrid, Natividad A1 - Ortega, Juan Antonio T1 - Can Virtual Reality be used as a significant stressor for studies using ECG? T2 - 24rd International Conference on Knowledge-Based and Intelligent Information & Engineering Systems (KES2020), 16 - 18 September 2020, Verona, Italy, virtual; (Procedia Computer Science) N2 - In previous studies, we used a method for detecting stress that was based exclusively on heart rate and ECG for differentiation between such situations as mental stress, physical activity, relaxation, and rest. As a response of the heart to these situations, we observed different behavior in the Root Mean Square of the Successive differences heartbeats (RMSSD). This study aims to analyze Virtual Reality via a virtual reality headset as an effective stressor for future works. The value of the Root Mean Square of the Successive Differences is an important marker for the parasympathetic effector on the heart and can provide information about stress. For these measurements, the RR interval was collected using a breast belt. In these studies, we can observe the Root Mean Square of the successive differences heartbeats. Additional sensors for the analysis were not used. We conducted experiments with ten subjects that had to drive a simulator for 25 minutes using monitors and 25 minutes using virtual reality headset. Before starting and after finishing each simulation, the subjects had to complete a survey in which they had to describe their mental state. The experiment results show that driving using virtual reality headset has some influence on the heart rate and RMSSD, but it does not significantly increase the stress of driving. KW - Stress detection KW - ECG KW - Driving KW - Heart rate KW - Biovital signal Y1 - 2020 SN - 1877-0509 SS - 1877-0509 U6 - https://dx.doi.org/10.1016/j.procs.2020.09.123 DO - https://dx.doi.org/10.1016/j.procs.2020.09.123 VL - 176 SP - 3255 EP - 3262 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Shkilniuk, Yurii A1 - Alarcón, Ángel Serrano A1 - Gaiduk, Maksym A1 - Seepold, Ralf A1 - Martínez Madrid, Natividad T1 - Analysis of Survey Tools for Recommender Systems in the Selection of Ambient Assisted Living Technologies T2 - 24rd International Conference on Knowledge-Based and Intelligent Information & Engineering Systems (KES2020), 16 - 18 September 2020, Verona, Italy, virtual; (Procedia Computer Science) N2 - This work is a study about a comparison of survey tools and it should help developers in selecting a suited tool for application in an AAL environment. The first step was to identify the basic required functionality of the survey tools used for AAL technologies and to compare these tools by their functionality and assignments. The comparative study was derived from the data obtained, previous literature studies and further technical data. A list of requirements was stated and ordered in terms of relevance to the target application domain. With the help of an integrated assessment method, the calculation of a generalized estimate value was performed and the result is explained. Finally, the planned application of this tool in a running project is explained. KW - Smart home KW - Assisted living Y1 - 2020 SN - 1877-0509 SS - 1877-0509 U6 - https://dx.doi.org/10.1016/j.procs.2020.09.294 DO - https://dx.doi.org/10.1016/j.procs.2020.09.294 VL - 176 SP - 2332 EP - 2340 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Stuburić, Klara A1 - Gaiduk, Maksym A1 - Seepold, Ralf T1 - A deep learning approach to detect sleep stages T2 - 24rd International Conference on Knowledge-Based and Intelligent Information & Engineering Systems (KES2020), 16 - 18 September 2020, Verona, Italy, virtual; (Procedia Computer Science) N2 - This paper presents the implementation of deep learning methods for sleep stage detection by using three signals that can be measured in a non-invasive way: heartbeat signal, respiratory signal, and movement signal. Since signals are measurements taken during the time, the problem is seen as time-series data classification. Deep learning methods are chosen to solve the problem are convolutional neural network and long-short term memory network. Input data is structured as a time-series sequence of mentioned signals that represent 30 seconds epoch, which is a standard interval for sleep analysis. The records used belong to the overall 23 subjects, which are divided into two subsets. Records from 18 subjects were used for training the data and from 5 subjects for testing the data. For detecting four sleep stages: REM (Rapid Eye Movement), Wake, Light sleep (Stage 1 and Stage 2), and Deep sleep (Stage 3 and Stage 4), the accuracy of the model is 55%, and F1 score is 44%. For five stages: REM, Stage 1, Stage 2, Deep sleep (Stage 3 and 4), and Wake, the model gives an accuracy of 40% and F1 score of 37%. KW - Sleep stages KW - Deep learning KW - Biosignal processing KW - Convolutional neural network Y1 - 2020 SN - 1877-0509 SS - 1877-0509 U6 - https://dx.doi.org/10.1016/j.procs.2020.09.280 DO - https://dx.doi.org/10.1016/j.procs.2020.09.280 VL - 176 SP - 2764 EP - 2772 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Seepold, Ralf A1 - Conti, Massimo A1 - Martínez Madrid, Natividad A1 - Aironi, Carlo A1 - Orcioni, Simone A1 - Gaiduk, Maksym T1 - Die Ballistokardiographie misst die Herzfrequenz anhand der mechanischen Körperschwingungen aus der Herzbewegung T2 - Abstracts der 28. Jahrestagung der Deutschen Gesellschaft für Schlafforschung und Schlafmedizin e. V., „Schlaf und Arbeit“, 29.–31. Oktober 2020, virtuell (Somnologie, 2020, Vol. 24, Suppl. 1) N2 - Für die Überwachung des Schlafs zu Hause sind nichtinvasive Methoden besonders gut anwendbar. Die Signale, die häufig überwacht werden, sind Herzfrequenz und Atemfrequenz. Die Ballistokardiographie (BCG)ist eine Technik, bei der die Herzfrequenz aus den mechanischen Schwingungen des Körpers bei jedem Herzzyklus gemessen wird. Kürzlich wurden Übersichtsarbeiten veröffentlicht. Die Untersuchung soll in einem ersten Ansatz bewerten, ob die Herzfrequenz anhand von BCG erkannt werden kann. Die wesentlichen Randbedingungen sind, ob dies gelingt, wenn der Sensor unter der Matratze positioniert wird und kostengünstige Sensoren zum Einsatz kommen. KW - Ballistokardiographie KW - Herzfrequenz KW - BCG Y1 - 2020 SN - 1439-054X SS - 1439-054X SN - 1432-9123 SS - 1432-9123 U6 - https://dx.doi.org/10.1007/s11818-020-00267-4 DO - https://dx.doi.org/10.1007/s11818-020-00267-4 N1 - Volltextzugriff für Angehörige der Hochschule Konstanz möglich SP - S41 EP - S42 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Gaiduk, Maksym A1 - Seepold, Ralf A1 - Penzel, Thomas T1 - Kontaktloses System zur Erkennung von Apnoe T2 - Abstracts der 28. Jahrestagung der Deutschen Gesellschaft für Schlafforschung und Schlafmedizin e. V., „Schlaf und Arbeit“, 29.–31. Oktober 2020, virtuell (Somnologie, 2020, Vol. 24, Suppl. 1) N2 - Die Schlafapnoe ist eine häufig auftretende Schlafstörung, die unterschiedliche Auswirkungen auf unseren Alltag hat; so wurde z. B. über eine Tagesschläfrigkeit von etwa 25 % der Patienten mit obstruktiver Schlafapnoe (OSA) berichtet. Ziel dieser Arbeit ist die Entwicklung eines Systems, das eine nichtinvasive Erkennung der Schlafapnoe in häuslicher Umgebung ermöglichen soll. KW - Apnoe KW - Schlafstudie KW - Kontaktloses Hardware-System Y1 - 2020 SN - 1432-9123 SS - 1432-9123 SN - 1439-054X SS - 1439-054X U6 - https://dx.doi.org/10.1007/s11818-020-00267-4 DO - https://dx.doi.org/10.1007/s11818-020-00267-4 N1 - Volltextzugriff für Angehörige der Hochschule Konstanz möglich SP - S29 EP - S30 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Seepold, Ralf A1 - Stuburić, Klara A1 - Gaiduk, Maksym A1 - Martínez Madrid, Natividad A1 - Penzel, Thomas T1 - Aufwandsbegrenztes maschinelles Lernen zur Bestimmung von Schlafstadien T2 - Abstracts der 28. Jahrestagung der Deutschen Gesellschaft für Schlafforschung und Schlafmedizin e. V., „Schlaf und Arbeit“, 29.–31. Oktober 2020, virtuell (Somnologie, 2020, Vol. 24, Suppl. 1) N2 - In diesem Beitrag wird eine Methode des maschinellen Lernens entwickelt, die die Schlafstadienerkennung untersucht. Übliche Methoden der Schlafanalyse basieren auf der Polysomnographie (PSG). Der präsentierte Ansatz basiert auf Signalen, die ausschließlich nicht-invasiv in einer häuslichen Umgebung gemessen werden können. Bewegungs-, Herzschlags- und Atmungssignale können vergleichsweise leicht erfasst werden aber die Erkennung der Schlafstadien ist dadurch erschwert. Die Signale werden als Zeitreihenfolge strukturiert und in Epochen überführt. Die Leistungsfähigkeit von maschinellem Lernen wird der Polysomnographie gegenübergestellt und bewertet. KW - Schlafstadien KW - Maschinelles Lernen KW - Zeitreihenklassifikation KW - PSG Y1 - 2020 SN - 1439-054X SS - 1439-054X SN - 1432-9123 SS - 1432-9123 U6 - https://dx.doi.org/10.1007/s11818-020-00267-4 DO - https://dx.doi.org/10.1007/s11818-020-00267-4 N1 - Volltextzugriff für Angehörige der Hochschule Konstanz möglich SP - S22 EP - S23 ER - TY - CHAP U1 - Buchbeitrag A1 - Yalcin, Erdal A1 - Felbermayr, Gabriel A1 - Steininger, Marina T1 - United States: What to Expect from a Protective US Trade Policy T2 - The Handbook of Global Trade Policy, Edited by Andreas Klasen N2 - Due to its economic size, economic policy measures, in particular trade policies, have a far‐reaching impact on global economic developments. This chapter quantifies the economic consequences of US protectionist trade aspirations. It focuses on trade policy scenarios, which have been communicated by the current US administration as potential new trade policies. The chapter draws on the results of a study of the ifo Institute conducted on behalf of the Bertelsmann Foundation. In the first simulation, a retraction from the North American Free Trade Agreement is considered. The chapter then illustrates the potential consequences of a “border tax adjustment” policy. It also simulates further measures to protect the US market by presuming an increase in American duties. The chapter presents robust quantitative results that can be expected if an increasingly protectionist US trade policy were to be implemented. KW - Trade policy KW - Tariffs KW - Non-tariff barriers Y1 - 2020 SN - 978-1-119-16738-9 SB - 978-1-119-16738-9 SN - 978-1-119-16743-3 SB - 978-1-119-16743-3 SN - 978-1-119-16740-2 SB - 978-1-119-16740-2 U6 - https://dx.doi.org/10.1002/9781119167402.ch12 DO - https://dx.doi.org/10.1002/9781119167402.ch12 SP - 308 EP - 327 PB - Wiley Blackwell CY - Hoboken, NJ ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Yalcin, Erdal A1 - Felbermayr, Gabriel A1 - Yotov, Yoto V. A1 - Kirilakha, Aleksandra A1 - Syropoulos, Constantinos T1 - The global sanctions data base JF - European Economic Review N2 - This article introduces the Global Sanctions Data Base (GSDB), a new dataset of economic sanctions that covers all bilateral, multilateral, and plurilateral sanctions in the world during the 1950–2016 period across three dimensions: type, political objective, and extent of success. The GSDB features by far the most cases amongst data bases that focus on effective sanctions (i.e., excluding threats) and is particularly useful for analysis of bilateral international transactional data (such as trade flows). We highlight five important stylized facts: (i) sanctions are increasingly used over time; (ii) European countries are the most frequent users and African countries the most frequent targets; (iii) sanctions are becoming more diverse, with the share of trade sanctions falling and that of financial or travel sanctions rising; (iv) the main objectives of sanctions are increasingly related to democracy or human rights; (v) the success rate of sanctions has gone up until 1995 and fallen since then. Using state-of-the-art gravity modeling, we highlight the usefulness of the GSDB in the realm of international trade. Trade sanctions have a negative but heterogeneous effect on trade, which is most pronounced for complete bilateral sanctions, followed by complete export sanctions. KW - Sanctions KW - Sanction databases KW - Effects of sanctions on trade Y1 - 2020 SN - 0014-2921 SS - 0014-2921 U6 - https://dx.doi.org/10.1016/j.euroecorev.2020.103561 DO - https://dx.doi.org/10.1016/j.euroecorev.2020.103561 VL - 129 IS - October, Article 103561 SP - 23 S1 - 23 ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Huff, Simon A1 - Keh, Tobias A1 - Lang, Michael A1 - Mohr, Georg A1 - Trippel, Marco A1 - Mueller, Rainer A1 - Schimkat, Ralf T1 - Seamless-Learning-Plattform BT - Digitale Unterstützung der Lehrenden bei der Konzipierung, Entwicklung, Erstellung von und der Suche nach Lehr-/Lernkonzepten T2 - Seamless Learning – lebenslanges, durchgängiges Lernen ermöglichen (Gesellschaft für Medien in der Wissenschaft ; 77) GMW Tagung 2020, 27. Jahrestagung der Gesellschaft für Medien in der Wissenschaft e.V., 24-26. August 2020, ZHAW School of Management and Law, Winterthur, Schweiz KW - Lebenslanges Lernen KW - Design-based research Y1 - 2020 SN - 978-3-8309-4244-3 SB - 978-3-8309-4244-3 SN - 978-3-8309-9244-8 SB - 978-3-8309-9244-8 U6 - https://dx.doi.org/10.31244/9783830992448 DO - https://dx.doi.org/10.31244/9783830992448 SP - 231 EP - 234 PB - Waxmann Verlag CY - Münster ; New York ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Schimkat, Ralf A1 - Mueller, Rainer A1 - Keh, Tobias A1 - Lang, Michael A1 - Huff, Simon A1 - Mohr, Georg A1 - Trippel, Marco T1 - Praxisrelevantes, agiles Lehren an Hochschulen mit integrativer Einbindung von Unternehmen BT - Nahtloser Übergang in Lehrveranstaltungen zwischen Hochschulen und Unternehmen T2 - Seamless Learning – lebenslanges, durchgängiges Lernen ermöglichen (Gesellschaft für Medien in der Wissenschaft ; 77) GMW Tagung 2020, 27. Jahrestagung der Gesellschaft für Medien in der Wissenschaft e.V., 24-26. August 2020, ZHAW School of Management and Law, Winterthur, Schweiz N2 - Die Überwindung des Bruchs (Seam) beim Lernen im Studium zwischen dem Hochschulkontext und der beruflichen Praxis ist durch die zeitlich, räumlich und organisatorisch bedingte Trennung der relevanten Akteure (u. a. Lehrende, Lernende, Unternehmensvertreter) eine sehr große Herausforderung (Milrad et al., 2013). Eine seamless-learning-basierte Konzeption einer Lehrveranstaltung auf Basis agiler Werte und Methoden (u. a. inkrementelles Vorgehen, Fokus auf lernendenzentrierte Veranstaltungen, individualisiertes Lernenden-Feedback) kann bei der Überwindung dieses bedeutenden Bruchs helfen. In dem Poster wird das grundsätzliche Design eines derartigen agilen SL-Konzepts auf Basis eines iterativ, inkrementellen Vorgehens innerhalb eines Semesterzyklus von 15 Wochen in drei Lernsprints erörtert. Darüber hinaus wird über erste Lehrerfahrungen der Dozierenden sowohl aus der Hochschule als auch aus dem industriellen Umfeld und Lernerfahrungen der Studierenden aus den vergangenen zwei Jahren berichtet. KW - Agiles Lehren KW - Lernen Y1 - 2020 SN - 978-3-8309-4244-3 SB - 978-3-8309-4244-3 SN - 978-3-8309-9244-8 SB - 978-3-8309-9244-8 U6 - https://dx.doi.org/10.31244/9783830992448 DO - https://dx.doi.org/10.31244/9783830992448 SP - 213 EP - 215 S1 - 3 PB - Waxmann Verlag CY - Münster ; New York ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Safieh, Malek A1 - Freudenberger, Jürgen T1 - Montgomery Modular Arithmetic over Gaussian Integers T2 - 24th International Conference on Information Technology (IT), 18-22 February 2020, Zabljak, Montenegro N2 - The Montgomery multiplication is an efficient method for modular arithmetic. Typically, it is used for modular arithmetic over integer rings to prevent the expensive inversion for the modulo reduction. In this work, we consider modular arithmetic over rings of Gaussian integers. Gaussian integers are subset of the complex numbers such that the real and imaginary parts are integers. In many cases Gaussian integer rings are isomorphic to ordinary integer rings. We demonstrate that the concept of the Montgomery multiplication can be extended to Gaussian integers. Due to independent calculation of the real and imaginary parts, the computation complexity of the multiplication is reduced compared with ordinary integer modular arithmetic. This concept is suitable for coding applications as well as for asymmetric key cryptographic systems, such as elliptic curve cryptography or the Rivest-Shamir-Adleman system. KW - Computational complexity KW - Digital arithmetic KW - Encoding KW - Public key cryptography Y1 - 2020 UR - https://ieeexplore.ieee.org/document/9070297 SN - 978-1-7281-5136-6 SB - 978-1-7281-5136-6 U6 - https://dx.doi.org/10.1109/IT48810.2020.9070297 DO - https://dx.doi.org/10.1109/IT48810.2020.9070297 N1 - Volltextzugriff für Angehörige der Hochschule Konstanz via Datenbank IEEE Xplore möglich SP - 4 S1 - 4 PB - IEEE ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Safieh, Malek A1 - Bailon, Daniel Nicolas A1 - Freudenberger, Jürgen T1 - An Acceptance Criterion for Hybrid Algebraic and Soft-input Decoding T2 - 24th International Conference on Information Technology (IT), 18-22 February 2020, Zabljak, Montenegro N2 - In this work, we investigate a hybrid decoding approach that combines algebraic hard-input decoding of binary block codes with soft-input decoding. In particular, an acceptance criterion is proposed which determines the reliability of a candidate codeword. For many received codewords the stopping criterion indicates that the hard-decoding result is sufficiently reliable, and the costly soft-input decoding can be omitted. The proposed acceptance criterion significantly reduces the decoding complexity. For simulations we combine the algebraic hard-input decoding with ordered statistics decoding, which enables near maximum likelihood soft-input decoding for codes of small to medium block lengths. KW - Binary codes KW - Block codes KW - Maximum likelihood decoding Y1 - 2020 UR - https://ieeexplore.ieee.org/document/9070575 SN - 978-1-7281-5136-6 SB - 978-1-7281-5136-6 U6 - https://dx.doi.org/10.1109/IT48810.2020.9070575 DO - https://dx.doi.org/10.1109/IT48810.2020.9070575 N1 - Volltextzugriff für Angehörige der Hochschule Konstanz via Datenbank IEEE Xplore möglich SP - 5 S1 - 5 PB - IEEE ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Rohweder, Daniel A1 - Stern, Sebastian A1 - Fischer, Robert F. H. A1 - Shavgulidze, Sergo A1 - Freudenberger, Jürgen T1 - Low-Complexity Detection for Multi-Dimensional Spatial Modulation Schemes T2 - WSA 2020; 24th International ITG Workshop on Smart Antennas, 18 - 20 February 2020, Hamburg, Germany N2 - Multi-dimensional spatial modulation is a multipleinput/ multiple-output wireless transmission technique, that uses only a few active antennas simultaneously. The computational complexity of the optimal maximum-likelihood (ML) detector at the receiver increases rapidly as more transmit antennas or larger modulation orders are employed. ML detection may be infeasible for higher bit rates. Many suboptimal detection algorithms for spatial modulation use two-stage detection schemes where the set of active antennas is detected in the first stage and the transmitted symbols in the second stage. Typically, these detection schemes use the ML strategy for the symbol detection. In this work, we consider a suboptimal detection algorithm for the second detection stage. This approach combines equalization and list decoding. We propose an algorithm for multi-dimensional signal constellations with a reduced search space in the second detection stage through set partitioning. In particular, we derive a set partitioning from the properties of Hurwitz integers. Simulation results demonstrate that the new algorithm achieves near-ML performance. It significantly reduces the complexity when compared with conventional two-stage detection schemes. Multi-dimensional constellations in combination with suboptimal detection can even outperform conventional signal constellations in combination with ML detection. KW - Low-complexity detection KW - Generalized multi-stream spatial modulation KW - Multistage detection Y1 - 2020 UR - https://ieeexplore.ieee.org/document/9096964 SN - 978-3-8007-5200-3 SB - 978-3-8007-5200-3 N1 - Volltextzugriff für Hochschulangehörige via Datenbank IEEE Xplore möglich SP - 6 S1 - 6 PB - VDE Verlag CY - Berlin ; Offenbach ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Rohweder, Daniel A1 - Shavgulidze, Sergo A1 - Freudenberger, Jürgen T1 - Codes over Gaussian Integers for Spatial Modulation T2 - WSA 2020; 24th International ITG Workshop on Smart Antennas, 18 - 20 February 2020, Hamburg, Germany N2 - Spatial modulation is a low-complexity multipleinput/ multipleoutput transmission technique. The recently proposed spatial permutation modulation (SPM) extends the concept of spatial modulation. It is a coding approach, where the symbols are dispersed in space and time. In the original proposal of SPM, short repetition codes and permutation codes were used to construct a space-time code. In this paper, we propose a similar coding scheme that combines permutation codes with codes over Gaussian integers. Short codes over Gaussian integers have good distance properties. Furthermore, the code alphabet can directly be applied as signal constellation, hence no mapping is required. Simulation results demonstrate that the proposed coding approach outperforms SPM with repetition codes. KW - Spatial modulation (SM) KW - Spatial permutation modulation (SPM) KW - One Mannheim error correcting codes (OMEC) KW - Index modulation (IM) KW - Codes over Gaussian integers KW - Multiple-input/multiple-output (MIMO) Y1 - 2020 UR - https://ieeexplore.ieee.org/document/9096965 SN - 978-3-8007-5200-3 SB - 978-3-8007-5200-3 N1 - Volltextzugriff für Hochschulangehörige via Datenbank IEEE Xplore möglich SP - 6 S1 - 6 PB - VDE Verlag CY - Berlin ; Offenbach ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Thiers, Johann-Philipp A1 - Safieh, Malek A1 - Freudenberger, Jürgen T1 - An Elliptic Curve Cryptographic Coprocessor for Resource-Constrained Systems with Arithmetic over Solinas Primes and Arbitrary Prime Fields T2 - ZINC 2020, Zooming Innovation in Consumer Technologies Conference, 26-27 May, 2020, Novi Sad, Serbia N2 - Many resource-constrained systems still rely on symmetric cryptography for verification and authentication. Asymmetric cryptographic systems provide higher security levels, but are very computational intensive. Hence, embedded systems can benefit from hardware assistance, i.e., coprocessors optimized for the required public key operations. In this work, we propose an elliptic curve cryptographic coprocessors design for resource-constrained systems. Many such coprocessor designs consider only special (Solinas) prime fields, which enable a low-complexity modulo arithmetic. Other implementations support arbitrary prime curves using the Montgomery reduction. These implementations typically require more time for the point multiplication. We present a coprocessor design that has low area requirements and enables a trade-off between performance and flexibility. The point multiplication can be performed either using a fast arithmetic based on Solinas primes or using a slower, but flexible Montgomery modular arithmetic. KW - Elliptic curve cryptography KW - Point multiplication KW - Solinas primes KW - Montgomery modular multiplication Y1 - 2020 UR - https://ieeexplore.ieee.org/document/9161807 SN - 978-1-7281-8259-9 SB - 978-1-7281-8259-9 U6 - https://dx.doi.org/10.1109/ZINC50678.2020.9161807 DO - https://dx.doi.org/10.1109/ZINC50678.2020.9161807 N1 - Volltextzugriff für Angehörige der Hochschule Konstanz via Datenbank IEEE Xplore möglich SP - 313 EP - 318 PB - IEEE ER -