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Luzern, Switzerland

The Lucerne University of Applied science and Arts is one of seven regional, public-funded universities of applied science founded in 1997. The University was called University of Applied science of Central Switzerland until October the 15th 2007. Lucerne University of Applied science and Arts is a Swiss public vocational university with campuses in Lucerne, Horw and Zug. Wikipedia.

Bedon C.,University of Trieste | Belis J.,Ghent University | Luible A.,Lucerne University of Applied Sciences
Engineering Structures

Due to the large increase of structural glass applications, the lateral torsional buckling behavior of glass beams actually represents a topic of great interest for researchers. Although several analytical models and design approaches exist in literature, various aspects complicate the realistic prediction of their typical out-of-plane response, especially if composed of two (or more) laminated glass sheets. Based on viscoelastic numerical results and predictions of a large experimental campaign of lateral torsional buckling tests performed on PVB and SG beams, the paper investigates the accuracy of existing analytical models in the prediction of the elastic critical load and load-lateral displacement path of these elements. © 2013 Elsevier Ltd. Source

Martinez-Garcia J.C.,University of Bern | Rzoska S.J.,University of Silesia | Rzoska S.J.,Polish Academy of Sciences | Drozd-Rzoska A.,Foundation C2B | Martinez-Garcia J.,Lucerne University of Applied Sciences
Nature Communications

The dynamics of glass is of importance in materials science but its nature has not yet been fully understood. Here we report that a verification of the temperature dependencies of the primary relaxation time or viscosity in the ultraslowing/ultraviscous domain of glass-forming systems can be carried out via the analysis of the inverse of the Dyre-Olsen temperature index. The subsequent analysis of experimental data indicates the possibility of the self-consistent description of glass-forming low-molecular-weight liquids, polymers, liquid crystals, orientationally disordered crystals and Ising spin-glass-like systems, as well as the prevalence of equations associated with the 'finite temperature divergence'. All these lead to a new formula for the configurational entropy in glass-forming systems. Furthermore, a link to the dominated local symmetry for a given glass former is identified here. Results obtained show a new relationship between the glass transition and critical phenomena. © 2013 Macmillan Publishers Limited. All rights reserved. Source

Smulders S.,University of Tilburg | Bretschger L.,ETH Zurich | Egli H.,Lucerne University of Applied Sciences
Environmental and Resource Economics

The paper provides a theoretical explanation for the inverted U-shaped relation between pollution and income often found in empirical research (Environmental Kuznets Curve). We model the transition in the pollution pattern as a change in general purpose technologies and investigate how it interferes with economic growth driven by quality improvements. We provide an analytical foundation for the claim that the rise and decline of pollution can be explained by endogenous innovations, policy-induced technology shifts, and intrasectoral changes. Once environmental degradation becomes too severe, regulation is introduced by which society forces the economy to make a transition to cleaner production. © 2010 Springer Science+Business Media B.V. Source

Wood energy contributes 4% to the total energy demand in Switzerland and is expected to reach 6% by 2020. As a directly storable fuel, energy wood is highly valuable to complement temporarily available solar and wind energy. Since the potential of wood is limited, highly effective applications to substitute fossil fuels need to be prioritised. For this, the energy yield factor is introduced, which reveals that heat and power from wood achieve a high substitution efficiency enabling a reduction of fossil CO2 of up to 90%. Consequently, the unused potential of energy wood should be mobilised for heating, disctrict heat, and combined heat and power (CHP). For these applications, the following developments need to be carried on: small-scale devices with low pollutant emissions by two-stage combustion, stringent execution of air pollution control to avoid inappropriate operation, improvements of grate boilers by aerodynamic optimisation, sectoral fuel conversion, and reduction of fuel NOX emissions by advanced staged combustion. With respect to power from wood, technologies with reduced cost for applications smaller than 1 MWe must be developed, while for low-quality wood fuels, a limited number of highly efficient plants based on Integrated Gasification Combined Cycle (IGCC) is most promising. The findings reveal that the assumptions for the Swiss energy strategy 2050 with a decline of energy wood for heat by 60% and a shift to bio fuels are not justified, since wood for heat, power, and CHP achieves higher energy yields with technologies which are available or ready to implementation (IGCC) and economically viable. Source

Achermann M.,University of Massachusetts Amherst | Achermann M.,Lucerne University of Applied Sciences
Journal of Physical Chemistry Letters

The complementary optical properties of metal and semiconductor nanostructures make them attractive components for many applications that require controlled flow of electromagnetic energy on the nanometer length scale. When combined into heterostructures, the nanometer-scale vicinity of the two material systems leads to interactions between quantum-confined electronic states in semiconductor nanostructures and dielectric-confined electromagnetic modes in the metal counterparts. Such exciton-plasmon interactions allow design of absorption and emission properties, control of nanoscale energy-transfer processes, creation of new excitations in the strong coupling regime, and increase of optical nonlinearities. With the advancement of novel fabrication techniques, the functionalities of metal-semiconductor nanostructures will be further increased for better control of optical properties and energy flows on nanometer length and femtosecond time scales. © 2010 American Chemical Society. Source

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