Abstracts

The degree of complexity in analyzing massively parallel, heterogeneous data from electrophysiological experiments and network simulations has reached levels where novel tools forming workflows for managing data, metadata acquisition, pre-processing, and analysis in a reproducible fashion are in high demand. Moreover, this complexity calls for new conceptual approaches in organizing scientific work. [...]

The ongoing growth of consumer electronics market, as well as the demand for even more complex data and telecommunication systems require energy-efficient integrated circuits and data links [1]. One possibility to tackle this challenge is to replace electrons with photons for low-power on-chip and/or chip-to-chip data transfer [2]. [...]

Since the first report on lasing from GeSn/Ge/Si [1], optically-pumped lasing has been demonstrated from GeSn heterostructures with maximum Sn contents of 17.5 at. % and operating temperatures up to 180 K, thus paving the way for the use of GeSn in monolithically grown group IV optoelectronic devices [2,3,4].In line with the development of III-V lasers since the sixties, the next logical step is to use hetero- and nanostructures to enhance radiative processes occurring in the active regions [5]. [...]

In this work, we discuss carrier confinement in double heterostructures and multiple quantum well GeSn/(Si)Ge(Sn) heterostructures, aiming for efficient light emitting devices. Several heterostructures are ep-itaxially grown and characterized in detail concerning their structural and optical properties. [...]

In this work, we address the thermal stability of GeSn alloys regarding strain relaxation and Sn diffusion. The two competing processes, i.e. [...]

The observation of lasing action in GeSn opens a new path for monolithic integration of electronics and photonics based on Si. In this context, the incorporation of Si into GeSn and epitaxial growth of GeSn/(Si)Ge(Sn) heterostructures are essential for electrically pumped optoelectronic devices. [...]

Optimization of Urban Energy Supply Systems Considering Various Sector-Coupling Options for Different Penetration Rates of Battery Electric Vehicles Timo Kannengiesser*1, Peter Stenzel1, Peter Markewitz1, Stefan Nykamp3, Klaus Peters3, Fabian Schütz3, Martin Robinius1, Detlef Stolten1,² 1Institute of Electrochemical Process Engineering (IEK-3), Forschungszentrum Juelich GmbH, Wilhelm-Johnen-Str., 52428 Juelich, Germany, +49 2461 61-8732, t.kannengiesser@fz-juelich.de2 Chair of Fuel Cells, RWTH Aachen University, c/o Institute of Electrochemical Process Engineering (IEK-3), Forschungszentrum Juelich GmbH, Wilhelm-Johnen-Str., 52428 Juelich, Germany3 Westnetz GmbH, Florianstraße 15-21, 44139 Essen, GermanyKeywords: MILP, Design Optimization, Operation Optimization, Urban District Optimization, District Heating, District Cooling, Transport Demand ModelUrban districts have a high potential to reduce greenhouse gas (GHG) emissions by increasing the energy efficiency by implementation of microgrids, which include various sector-coupling options. To find a cost optimal urban energy supply system this paper analyses different scenarios and the resulting effects on energy demand, structure of power generation and transmission system as well as energy system costs. [...]

siehe Anhang

Balanced networks of inhibitory and excitatory neurons with homogeneously random recurrent connectivity are often employed to model local cortical circuits. The balanced random network model exhibits irregular and asynchronous spiking activity similar to that observed in vivo. [...]

Abstract: Optimization of Urban Energy Supply Systems Considering an Increasing Integration of Battery Electric VehiclesIn Europe, the buildings sector accounts for 40% and cities for 69% of final energy consumption. The share of CO2 emissions in cities and urban districts are correspondingly high. [...]