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In automotive a lot of electromagnetically, pyrotechnically or mechanically driven actuators are integrated to run comfort systems and to control safety systems in modern passenger cars. Using shape memory alloys (SMA) the existing systems could be simplified, performing the same function through new mechanisms with reduced size, weight, and costs. A drawback for the use of SMA in safety systems is the lack of materials knowledge concerning the durability of the switching function (long-time stability of the shape memory effect). Pedestrian safety systems play a significant role to reduce injuries and fatal casualties caused by accidents. One automotive safety system for pedestrian protection is the bonnet lifting system. Based on such an application, this article gives an introduction to existing bonnet lifting systems for pedestrian protection, describes the use of quick changing shape memory actuators and the results of the study concerning the long-time stability of the tested NiTi-wires. These wires were trained, exposed up to 4years at elevated temperatures (up to 140°C) and tested regarding their phase change temperatures, times, and strokes. For example, it was found that A P-temperature is shifted toward higher temperatures with longer exposing periods and higher temperatures. However, in the functional testing plant a delay in the switching time could not be detected. This article gives some answers concerning the long-time stability of NiTi-wires that were missing till now. With this knowledge, the number of future automotive applications using SMA can be increased. It can be concluded, that the use of quick changing shape memory actuators in safety systems could simplify the mechanism, reduce maintenance and manufacturing costs and should be insertable also for other automotive applications.
The effect on the mean-variance space of restrictions on a variable is investigated in this
paper. A restriction may be the placing of upper and lower bounds on a variable.
Another limitation is the loss of the continuity of a variable.
Average marks for Examinations are considered in an application of this limited meanvariance
space. In this case, the bounds are given by the highest and the lowest possible mark (e.g. 1.0 and 5.0). The limitation of the mean-variance space depends on the number of students who participate in the examination. The restriction of the loss of continuity is shown by the use of discrete marks (e.g. 1.0, 1.3, 1.7, 2.0, …). Furthermore,
the Target-Shortfall-Probability lines are integrated into the mean-variance space. These
lines are used to indicate the proportion of students who have good or very good marks in the examination. In financial markets, Target-Shortfall-Probability is used as a risk criterion.
Noteninflation
(2014)
Atom interferometers have a multitude of proposed applications in space including precise measurements of the Earth's gravitational field, in navigation & ranging, and in fundamental physics such as tests of the weak equivalence principle (WEP) and gravitational wave detection. While atom interferometers are realized routinely in ground-based laboratories, current efforts aim at the development of a space compatible design optimized with respect to dimensions, weight, power consumption, mechanical robustness and radiation hardness. In this paper, we present a design of a high-sensitivity differential dual species 85Rb/87Rb atom interferometer for space, including physics package, laser system, electronics and software. The physics package comprises the atom source consisting of dispensers and a 2D magneto-optical trap (MOT), the science chamber with a 3D-MOT, a magnetic trap based on an atom chip and an optical dipole trap (ODT) used for Bose-Einstein condensate (BEC) creation and interferometry, the detection unit, the vacuum system for 10-11 mbar ultra-high vacuum generation, and the high-suppression factor magnetic shielding as well as the thermal control system.
The laser system is based on a hybrid approach using fiber-based telecom components and high-power laser diode technology and includes all laser sources for 2D-MOT, 3D-MOT, ODT, interferometry and detection. Manipulation and switching of the laser beams is carried out on an optical bench using Zerodur bonding technology. The instrument consists of 9 units with an overall mass of 221 kg, an average power consumption of 608 W (819 W peak), and a volume of 470 liters which would well fit on a satellite to be launched with a Soyuz rocket, as system studies have shown.
Flamenco und Tango gehören zu den ersten Assoziationen, mit denen Sevilla und Buenos Aires in Verbindung gebracht werden. Seit der Entstehung beider Kunstformen im 19. Jahrhundert entwickelte sich kontinuierlich ein Tanztourismus, der bis heute zu ausdifferenzierten Geschäftsmodellen führte. Flamenco und Tango erlangten als immaterielles Weltkulturerbe außerdem erhebliche Bedeutung für das Destinationsimage der beiden Städte. Das Modell von Gereffi et al. (2005) zu «Governance of Global Value Chains» wird in adaptierter Form auf Flamenco- und Tangotanztourismus angewendet, um Bedeutungsdimensionen im Destinationsmanagement herauszuarbeiten.
Für den deutschen bzw. europäischen Tourismus ist
Indien seit Jahrzehnten eine Destination, die kulturtouristisch,
aber auch zunehmend gesundheitstouristische
interessant ist. Sonderformen wie spiritueller
Tourismus, nachhaltiger Tourismus oder Tanztourismus
(Bollywood-Dance) haben sich in Nischen
etabliert oder beginnen diese zu verlassen. Indien
selbst unternahm mit seiner Kampagne „Incredible
India“ 2002 eine weltweit beachtete, selbstironische
Initiative, sich als „unglaubliche“ Destination in den
Auslandsmärkten zu positionieren. Demgegenüber
steht eine Realität in Indien, die einerseits Massenarmut,
Korruption, Sicherheitsprobleme, Bürokratie
und mangelnde Infrastruktur ebenso vorhält wie eine
beeindruckende Kultur- und Naturlandschaft, gut
ausgebildete englischsprachige Menschen, ethnische
Vielfalt sowie Mystik und Spiritualität. Indien definiert
sich – auch touristisch – durch Extreme (vgl. Freyer &
Thimm 2011: 261).
Unternehmensethik auf dem Vormarsch: ISO 26000 macht Ethik zur Norm globalen Wirtschaftshandelns
(2011)
Die konsensuell erarbeitete ISO 26000 ist ein Leitfaden zur Umsetzung von gesellschaftlicher Verantwortung. Sie sorgt nicht nur für ein klareres Verständnis des Beitrags, den alle Arten von Organisationen zur nachhaltigen Entwicklung der Gesellschaft leisten können, sondern führt die verschiedenen CSR-Themen zusammen, denen sich alle Organisationen, unabhängig von ihrem Zweck, ihrer Größe oder ihrem Standort heute gegenübersehen. Dabei integriert die ISO 26000 als Produkt eines einzigartigen, weltweiten Normungsprozesses bereits bestehende Normen und CSR-Standards zu einem international akzeptierten Leitfaden.
Der Aufsatz beleuchtet die Entstehungsgeschichte des Leitfadens und seine Inhalte, mit dessen Hilfe Organisationen das Ziel gesellschaftlicher Wohlfahrt verfolgen können und sollen.