TY - JOUR A1 - Junge Puring, Kai A1 - Piontek, Stefan A1 - Smialkowski, Mathias A1 - Burfeind, Jens A1 - Kaluza, Stefan A1 - Doetsch, Christian A1 - Apfel, Ulf-Peter T1 - Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications JF - Journal of visualized experiments : JoVE N2 - The rock material pentlandite with the composition Fe4.5Ni4.5S8 was synthesized via high temperature synthesis from the elements. The structure and composition of the material was characterized via powder X-ray diffraction (PXRD), Mössbauer spectroscopy (MB), scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and energy dispersive X-ray spectroscopy (EDX). Two preparation methods of pentlandite bulk electrodes are presented. In the first approach a piece of synthetic pentlandite rock is directly contacted via a wire ferrule. The second approach utilizes pentlandite pellets, pressed from finely ground powder, which is immobilized in a Teflon casing. Both electrodes, whilst being prepared by an additive-free method, reveal high durability during electrocatalytic conversions in comparison to common drop-coating methods. We herein showcase the striking performance of such electrodes to accomplish the hydrogen evolution reaction (HER) and present a standardized method to evaluate the electrocatalytic performance by electrochemical and gas chromatographic methods. Furthermore, we report stability tests via potentiostatic methods at an overpotential of 0.6 V to explore the material limitations of the electrodes during electrolysis under industrial relevant conditions. Y1 - 2017 UR - http://www.ncbi.nlm.nih.gov/pubmed/28671654 U6 - https://doi.org/10.3791/56087 SN - 1940-087X IS - 124 PB - JoVE ER - TY - JOUR A1 - Girod, Kai A1 - Breitkreuz, Klaas A1 - Gerstner, Andrea A1 - Marzi, Thomas A1 - Schulzke, Tim A1 - Kaluza, Stefan T1 - Close‐to‐Practice Investigations of Heterogeneously Catalyzed Syngas Conversions in Slurry and Fixed‐Bed Reactor Systems JF - Chemie Ingenieur Technik Y1 - 2018 U6 - https://doi.org/10.1002/cite.201700143 SN - 1522-2640 VL - 90 IS - 5 SP - 690 EP - 695 PB - Wiley ER - TY - JOUR A1 - Häusler, Alexander T1 - Populismus auf der politischen Bühne JF - iQ konkret KW - Forena Y1 - 2018 UR - https://www.netzwerk-iq.de/fileadmin/Redaktion/Downloads/IQ_Publikationen/IQ_konkret/2018_01_IQ_konkret.pdf N1 - Förderprogramm "Integration durch Qualifizierung (IQ)" IS - 1 ER - TY - JOUR A1 - Zander, Nils A1 - Kollmannsberger, Stefan A1 - Ruess, Martin A1 - Yosibash, Z. A1 - Rank, Ernst T1 - The Finite Cell Method for linear thermoelasticity JF - Computers & Mathematics with Applications Y1 - 2012 U6 - https://doi.org/10.1016/j.camwa.2012.09.002 SN - 0898-1221 N1 - Open Archiv VL - 64 IS - 11 SP - 3527 EP - 3541 PB - Elsevier ER - TY - JOUR A1 - Guo, Yujie A1 - Ruess, Martin T1 - Weak Dirichlet boundary conditions for trimmed thin isogeometric shells JF - Computers & Mathematics with Applications Y1 - 2015 U6 - https://doi.org/10.1016/j.camwa.2015.06.012 SN - 0898-1221 N1 - Open Archiv VL - 70 IS - 7 SP - 1425 EP - 1440 PB - Elsevier ER - TY - JOUR A1 - Amano, Katsumi A1 - Matsushita, Fumio A1 - Yanagawa, Hirofumi A1 - Cohen, Michael A1 - Herder, Jens A1 - Martens, William A1 - Koba, Yoshiharu A1 - Tohyama, Mikio T1 - A Virtual Reality Sound System Using Room-Related Transfer Functions Delivered Through a Multispeaker Array: the PSFC at the University of Aizu Multimedia Center JF - TVRSJ N2 - The PSFC, or Pioneer Sound Field Controller, is a DSP-driven hemispherical loudspeaker array, installed at the University of Aizu Multimedia Center. The PSFC features realtime manipulation of the primary components of sound spatialization for each of two audio sources located in a virtual environment, including the content (apparent direction and distance) and context (room characteristics: reverberation level, room size and liveness). In an alternate mode, it can also direct the destination of the two separate input signals across 14 loudspeakers, manipulating the direction of the virtual sound sources with no control over apparent distance other than that afforded by source loudness (including no simulated environmental reflections or reverberation). The PSFC speaker dome is about 10 m in diameter, accommodating about fifty simultaneous users, including about twenty users comfortably standing or sitting near its ``sweet spot,'' the area in which the illusions of sound spatialization are most vivid. Collocated with a large screen rear-projection stereographic display, the PSFC is intended for advanced multimedia and virtual reality applications. KW - audio signal processing, audio telecommunications KW - auralization KW - calm technology KW - directional mixing console KW - multichannel sound reproduction KW - room-related transfer functions KW - roomware KW - sound localization KW - virtual conferencing environment Y1 - 1998 U6 - https://doi.org/10.18974/tvrsj.3.1_1 VL - 3 IS - 1 SP - 1 EP - 12 PB - J-STAGE ER - TY - JOUR A1 - Migueles, Jairo H. A1 - Rowlands, Alex V. A1 - Huber, Florian A1 - Sabia, Séverine A1 - van Hees, Vincent T. T1 - GGIR: A Research Community–Driven Open Source R Package for Generating Physical Activity and Sleep Outcomes From Multi-Day Raw Accelerometer Data JF - Journal for the Measurement of Physical Behaviour Y1 - 2019 U6 - https://doi.org/10.1123/jmpb.2018-0063 SN - 2575-6605 VL - 2 IS - 3 SP - 188 EP - 196 PB - Human Kinetics ER - TY - JOUR A1 - Huber, Florian A1 - Käs, Josef A1 - Stuhrmann, Björn T1 - Growing actin networks form lamellipodium and lamellum by self-assembly JF - Biophysical Journal N2 - Many different cell types are able to migrate by formation of a thin actin-based cytoskeletal extension. Recently, it became evident that this extension consists of two distinct substructures, designated lamellipodium and lamellum, which differ significantly in their kinetic and kinematic properties as well as their biochemical composition. We developed a stochastic two-dimensional computer simulation that includes chemical reaction kinetics, G-actin diffusion, and filament transport to investigate the formation of growing actin networks in migrating cells. Model parameters were chosen based on experimental data or theoretical considerations. In this work, we demonstrate the system's ability to form two distinct networks by self-organization. We found a characteristic transition in mean filament length as well as a distinct maximum in depolymerization flux, both within the first 1-2 microm. The separation into two distinct substructures was found to be extremely robust with respect to initial conditions and variation of model parameters. We quantitatively investigated the complex interplay between ADF/cofilin and tropomyosin and propose a plausible mechanism that leads to spatial separation of, respectively, ADF/cofilin- or tropomyosin-dominated compartments. Tropomyosin was found to play an important role in stabilizing the lamellar actin network. Furthermore, the influence of filament severing and annealing on the network properties is explored, and simulation data are compared to existing experimental data. KW - Open Archive Y1 - 2008 UR - http://www.ncbi.nlm.nih.gov/pubmed/18708450 U6 - https://doi.org/10.1529/biophysj.108.134817 SN - 1542-0086 VL - 95 IS - 12 SP - 5508 EP - 5523 PB - Biophysical Society ER - TY - JOUR A1 - Voss, Karsten A1 - Musall, Eike A1 - Lichtmeß, Markus T1 - From Low Energy to Net Zero-Energy Buildings: Status and Perspectives JF - Journal of Green Building N2 - “Net Zero-Energy Building” has become a popular catchphrase to describe the synergy between energy-efficient building and renewable energy utilisation to achieve a balanced energy budget over an annual cycle. Taking into account the energy exchange with a grid overcomes the limitations of energy-autonomous buildings with the need for seasonal energy storage on-site. Although the expression, “Net Zero-Energy Building,” appears in many energy policy documents, a harmonised definition or a standardised balancing method is still lacking. This paper reports on the background and the various effects influencing the energy balance approach. After discussing the national energy code framework in Germany, a harmonised terminology and balancing procedure is proposed. The procedure takes not only the energy balance but also energy efficiency and load matching into account. KW - Eigene Methodik Y1 - 2011 U6 - https://doi.org/10.3992/jgb.6.1.46 VL - 6 IS - 1 SP - 46 EP - 57 PB - College Publishing ER - TY - JOUR A1 - Voss, Karsten A1 - Musall, Eike T1 - Null- und Plusenergiegebäude: Allgemeine Bilanzierungsverfahren und Schnittstellen zur normativen Praxis in Deutschland JF - EnEVaktuell N2 - Die Begriffe „Nullenergiehaus“ oder „Plusenergiehaus“ sind in den letzten Jahren national und international zum Inbegriff für die konsequente Zusammenführung von Maßnahmen zur drastischen Energieeinsparung und optimierter, dezentraler Nutzung erneuerbarer Energien geworden. Dabei geht es nicht um energieautarke Gebäude und die dabei große Herausforderung der saisonalen Energiespeicherung. Grundidee ist, dass die von einem Gebäude in ein Netz eingespeiste Energiemenge in der Jahresbilanz mindestens dem Energiebezug entspricht. Sowohl im Kontext der Fortführung der europäischen Gebäuderichtline als auch im aktuellen Energiekonzept und Energieforschungsprogramm der Bundesregierung wird das Thema besetzt. KW - Nullenergiehaus KW - Energieinsparung Y1 - 2011 UR - https://www.btga-arch.uni-wuppertal.de/fileadmin/architektur/btga-arch/btga_veroeffentlichungen/btga_zeitschrift/Null-_und_Plusenergiegeb%EF%BF%BDude_EnEVaktuell_12_2011.pdf IS - IV SP - 3 EP - 5 PB - DIN Deutsches Institut für Normung e.V. ER -