An empirical analysis of scenario generation methods for stochastic optimization

in European Journal of Operational Research (2016), 255(1), 121--132

Die Organisation von Bildung aus soziologischer Perspektive

in Leemann, Regula Julia; Imdorf, Christian; Powell, Justin J W (Eds.) et al Die Organisation von Bildung: Soziologische Analysen zu Schule, Berufsbildung, Hochschule und Weiterbildung (2016)

Die Bedeutung von Bildung für Individuen und Gesellschaften ist enorm gestiegen. Dieser Band widmet sich der Organisation von Bildung in Schule, Berufsbildung und Hochschule. Die Beiträge befassen sich ... [more ▼]

Die Bedeutung von Bildung für Individuen und Gesellschaften ist enorm gestiegen. Dieser Band widmet sich der Organisation von Bildung in Schule, Berufsbildung und Hochschule. Die Beiträge befassen sich mit noch wenig untersuchten Phänomenen der Entstehung, dem Funktionieren und der Entwicklung von Bildungsorganisationen sowie deren Prozessen der Herstellung und (ungleichen) Verteilung von Bildung. Die Organisation von Bildung in Form von Schulen ist allgegenwärtig und gleichzeitig unhinterfragt. Dieser Band diskutiert vor dem Hintergrund der enorm gestiegenen Bedeutung von Bildung für Individuen und Gesellschaften, wie unterschiedliche Typen von Bildungsorganisationen im Bereich von Schule, Berufsbildung oder Hochschule entstehen, funktionieren und sich weiterentwickeln. Er fragt nach den Prozessen, durch die die Subjekte gebildet und Ungleichheiten reproduziert werden. Die theoretisch-konzeptionellen und empirischen Beiträge beleuchten vielfältige Perspektiven und führen bildungs- und organisationssoziologische Forschungsergebnisse innovativ zusammen. [less ▲]

Experimental studies on the development of a solar hybrid module with an aluminum microchannel evaporator

in Proceedings of 2016 International Energy and Sustainability Conference (IESC 2016) (2016)

In recent years, the possibility to combine photovoltaics (PV) and solar thermal collectors into one hybrid module (PVT-module) has been increasingly investigated. PVT-modules produce thermal and ... [more ▼]

In recent years, the possibility to combine photovoltaics (PV) and solar thermal collectors into one hybrid module (PVT-module) has been increasingly investigated. PVT-modules produce thermal and electrical energy at the same time. As the efficiency of a photovoltaic module decreases with temperature, the temperature of the heat transfer media is often limited to about 30 °C and the PVT-module is combined with a heat pump, which increases the temperature on the “warm side”. This paper deals with a PVT-module, which combines a microchannel based evaporator of a CO2 (R744) heat pump with a PV panel (PVT-direct). The PVT-direct overall system is reduced to the refrigerant circuit due to the direct refrigerant expansion in the PVT-module. A conventional PVT heat pump system has an additional glycol-water circuit. Since a pump and an additional heat exchanger for the secondary cycle were omitted, the system has increased efficiency. Due to lower module temperatures, the increase of the photovoltaic efficiency is a further advantage of the PVT-direct-module. To prove the feasibility of the PVT-direct heat pump system, the Cologne Institute for Renewable Energy (CIRE) is developing and modeling a test facility for this purpose within the research project “PVT-direkt”. Furthermore, a functional PVT-direct-module with a microchannel based evaporator was designed and built. Much importance has been given to experimental studies under laboratory conditions in order to investigate (1) the adjustment of the functionality and layout of the PVT-direct-module for characterizing the joining of brazed joints in aluminum microchannel evaporators and (2) the influence of the backside aluminum plate of the PVT-direct-module regarding leakage currents and parasitic capacitances. The overall results obtained in these experimental studies are analyzed in this paper. [less ▲]

Hybrid plasmonic lattices with tunable magneto-optical activity

in Optics Express (2016), 24(4), 3652-3662

We report on the optical and magneto-optical response of hybrid plasmonic lattices that consist of pure nickel and gold nanoparticles in a checkerboard arrangement. Diffractive far-field coupling between ... [more ▼]

We report on the optical and magneto-optical response of hybrid plasmonic lattices that consist of pure nickel and gold nanoparticles in a checkerboard arrangement. Diffractive far-field coupling between the individual emitters of the lattices results in the excitation of two orthogonal surface lattice resonance modes. Local analyses of the radiation fields indicate that both the nickel and gold nanoparticles contribute to these collective resonances and, thereby, to the magneto-optical activity of the hybrid arrays. The strong effect of noble metal nanoparticles on the magneto-optical response of hybrid lattices opens up new avenues for the realization of sensitive and tunable magneto-plasmonic nanostructures. [less ▲]

Aggregation, Validation, and Generalization of Qualitative Data - Methodological and Practical Research Strategies Illustrated by the Research Process of an empirically Based Typology

in Integrative Psychological and Behavioral Science (2016)

The article deals with the question of how aggregated data which allow for generalizable insights can be generated from single-case based qualitative investigations. Thereby, two central challenges of ... [more ▼]

The article deals with the question of how aggregated data which allow for generalizable insights can be generated from single-case based qualitative investigations. Thereby, two central challenges of qualitative social research are outlined: First, researchers must ensure that the single-case data can be aggregated and condensed so that new collective structures can be detected. Second, they must apply methods and practices to allow for the generalization of the results beyond the specific study. In the following, we demonstrate how and under what conditions these challenges can be addressed in research practice. To this end, the research process of the construction of an empirically based typology is described. A qualitative study, conducted within the framework of the Luxembourg Youth Report, is used to illustrate this process. Specifically, strategies are presented which increase the likelihood of generalizability or transferability of the results, while also highlighting their limitations. [less ▲]

Parallel refinement of slanted 3D reconstruction using dense stereo induced from symmetry

in Journal of Real-Time Image Processing (2016)

Zur ästhetischen Dimension des Realismus

in Parr, Rolf; Fauth, Søren (Eds.) Neue Realismen der Gegenwartsliteratur (2016)

Mehrsprachigkeitsphilologie leben. Friedrich Wilhelm Genthe und Yoko Tawada

in Dembeck, Till; Uhrmacher, Anne (Eds.) Das literarische Leben der Sprachdifferenz. Methodische Erkundungen (2016)

Association

in Encyclopedie Dalloz (2016)

Ripples of risk

Article for general public (2016)