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100 Jahre Türkische Republik
(2023)
Aktuelle Fachvorträge aus dem internationalen Spektrum des Bauingenieurwesens an der HTWG Konstanz, anlässlich des 100-jährigen Bestehens der Fakultät BI. Themenbereiche: Bauerhaltung und Bausanierung, Geotechnik, Konstruktiver Ingenieurbau, Höhepunkte des Hochbaus im 21. Jahrhundert, Verkehrswesen, Wasserwirtschaft, Wirtschaftsingenieurwesen. Gefördert wurde die Veranstaltung von: ADK Modulraum GmbH ; Architektenkammer BW ; Bauen mit Stahl ; Beton Marketing Süd ; Bund Deutscher Architekten BDA ; Institut Feuerverzinken ; Form TL - Ingenieure für Tragwerk und Leichtbau GmbH ; OTT Ziegel Pfullendorf ; Stahlbauzentrum Schweiz ; Euro Poles Pfleiderer ; Ingenieurk@mmer Baden-Württemberg
3-Stufen-Pulswechselrichter
(2016)
33 Baukultur Rezepte
(2017)
Das vorliegende Buch ist entstanden im Rahmen des Forschungsprojekts „Baukultur konkret“ im Forschungsprogramm Experimenteller Wohnungs- und Städtebau (ExWoSt) des Bundesinstituts für Bau-, Stadt- und Raumforschung BBSR im Auftrag des Bundesministeriums für Umwelt, Naturschutz, Bau und Reaktorsicherheit BMUB.
The magneto-mechanical behavior of magnetic shape memory (MSM) materials has been investigated by means of different simulation and modeling approaches by several research groups. The target of this paper is to simulate actuators driven by MSM alloys and to understand the MSM element behavior during actuation, which shall lead to an increased performance of the actuator. It is shown that internal and external stresses should be taken into consideration using numerical computation tools for magnetic fields in an efficient way.
40 Jahre Neuland des Denkens
(2020)
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.
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.
One major realm of Condition Based Maintenance is finding features that reflect the current health state of the asset or component under observation. Most of the existing approaches are accompanied with high computational costs during the different feature processing phases making them infeasible in a real-world scenario. In this paper a feature generation method is evaluated compensating for two problems: (1) storing and handling large amounts of data and (2) computational complexity. Both aforementioned problems are existent e.g. when electromagnetic solenoids are artificially aged and health indicators have to be extracted or when multiple identical solenoids have to be monitored. To overcome those problems, Compressed Sensing (CS), a new research field that keeps constantly emerging into new applications, is employed. CS is a data compression technique allowing original signal reconstruction with far fewer samples than Shannon-Nyquist dictates, when some criteria are met. By applying this method to measured solenoid coil current, raw data vectors can be reduced to a way smaller set of samples that yet contain enough information for proper reconstruction. The obtained CS vector is also assumed to contain enough relevant information about solenoid degradation and faults, allowing CS samples to be used as input to fault detection or remaining useful life estimation routines. The paper gives some results demonstrating compression and reconstruction of coil current measurements and outlines the application of CS samples as condition monitoring data by determining deterioration and fault related features. Nevertheless, some unresolved issues regarding information loss during the compression stage, the design of the compression method itself and its influence on diagnostic/prognostic methods exist.