Suchergebnisse

Fliessbedingung und Fliessgesetz fuer Stahlbetonscheiben -- Fliessbedingungen -- Fliessgesetz und Kinematik -- Ergaenzungen -- Experimentelle Ergebnisse -- Balkentheorie -- Balken im Fliessregime I: Fachwerkmodell und Balkentheorie -- Balken in den Fliessregimes III, IV, V: Obere Schubspannungsgrenze -- Balken im Fliessregime I: Biegung und Torsion -- Scheibentheorie -- Plastizitaetstheorie der Stahlbetonscheibe -- Zur Schubbemessung von Stahlbetonbalken -- Fallstudie "Shear Wall Coupling Beam 391" [44] -- Schlusswort und Zusammenfassung.

This thesis focuses on the pension fund system in Switzerland. As the conditions on the financial markets have changed, the funds are facing a plethora of challenges. These involve, among others, the increasing lifetime of individuals, the conditions on the capital markets, the political system as well as governance and regulation. There is consequently a need for reforming the pension fund legislation. In this thesis, three selected topics that are connected to this, are studied more closely. The first topic addresses the stability of a fund. By raising additional contributions and distributing surpluses, it can maintain a desired safety level. It is studied how different choices for the governance affect the stability. It is found that raising additional contributions is beneficial for safety, while risk averse members dislike the instability originating from bonus payments. The second topic deals with the investment strategy of a pension fund. It is analyzed how the asset allocation changes when historical return characteristics are taken into account in a more detailed way. Different distributions assumptions are compared with respect to how they are able to replicate the characteristics of the investment classes. It is found that there is a considerable change in the portfolio and in the investment returns when the third and fourth moments and different distribution assumptions. The final topic revolves around the right calibration of the pension payment during retirement. It depends on the lifetime of the retiree and the investment strategy of the pension fund whether the savings suffice to cover the payments. It is compared how these factors influence the choice of the pension amount. The results indicate that a higher lifetime and a lower investment return require a decrease of the pension. Therein, the impact of the investment is found to be higher than the one of the lifetime. -- Cette thèse est axée sur le système des caisses de pension en Suisse. Avec le changement des conditions sur les marchés ...

Alongside the recent rise of political populism, a new type of alternative media has established in past years that allegedly contribute to the distribution of the populist narrative. Using a large-scale quota survey of German Internet users (n = 1346) we investigate political and media use predictors of exposure to alternative media with an affinity to populism (AMP). Results reveal substantial differences between occasional and frequent AMP users. While both groups heavily use Twitter and Facebook for political information, occasional AMP users exhibit hardly any specific political convictions (except that they feel less personally deprived than non-users). Contrary to that, frequent AMP exposure is related to higher personal relative deprivation, stronger populist attitudes and a higher likelihood to vote for the right-wing populist party AfD. Against this background, frequent AMP use can be interpreted as partisan selective exposure whereas occasional AMP exposure might result from incidental contact via social media platforms. These findings are discussed regarding the role of alternative and social media in the recent populism wave.

Die in der Werkstückebene vorliegende Kraftverteilung beeinflusst den Umformprozess maßgeblich. Deren Kenntnis ist die Grundlage für die wirksame Kompensation von maschinen- oder werkzeugseitigen Einflüssen, um eine ausschussfreie Teilefertigung zu erzielen. Der Fachbeitrag stellt einen modularen Ansatz für eine wirkstellennahe und gleichzeitig werkzeugunabhängige Kraftmessung vor. Die erfasste Kraftverteilung kann der Maschinensteuerung zur Verfügung gestellt oder über mobile Endgeräte angezeigt werden.
 
The force distribution in forming tools influences the deep drawing process significantly. The metrological detection is the base for the effective compensation of machine- or tool-caused impacts on the zero-defect production of deep drawing parts. This article presents a modular approach for the tool-independent force distribution measurement close to the process. The captured distribution can be provided to the machine control or can be shown on mobile devices.