@inproceedings{3961, abstract = {{Previous experimental measurements and numerical simulations give evidence of strong electric and magnetic field interaction between split-ring resonators in dense arrays. One can expect that such interactions have an influence on the second harmonic generation. We apply the Discontinuous Galerkin Time Domain method and the hydrodynamic Maxwell-Vlasov model to simulate the linear and nonlinear optical response from SRR arrays. The simulations show that dense placement of the constituent building blocks appears not always optimal and collective effects can lead to a significant suppression of the near fields at the fundamental frequency and, consequently, to the decrease of the SHG intensity. We demonstrate also the great role of the symmetry degree of the array layout which results in the variation of the SHG efficiency in range of two orders of magnitude.}}, author = {{Grynko, Yevgen and Meier, Torsten and Linden, Stefan and Niesler, Fabian B. P. and Wegener, Martin and Förstner, Jens}}, booktitle = {{Ultrafast Phenomena and Nanophotonics XVII}}, editor = {{Betz, Markus and Elezzabi, Abdulhakem Y. and Song, Jin-Joo and Tsen, Kong-Thon}}, keywords = {{tet_topic_shg, tet_topic_meta}}, pages = {{86230L--86230L--9}}, publisher = {{SPIE}}, title = {{{Optimal second-harmonic generation in split-ring resonator arrays}}}, doi = {{10.1117/12.2003279}}, volume = {{8623}}, year = {{2013}}, } @article{41354, author = {{Kehne, Miriam and Seifert, Andreas and Schaper, Niclas}}, journal = {{Sportunterricht}}, number = {{2}}, pages = {{53--57}}, title = {{{Struktur eines Instruments zur Kompetenzerfassung in der Sportlehrerausbildung.}}}, volume = {{62}}, year = {{2013}}, } @inproceedings{528, abstract = {{Cold-boot attacks exploit the fact that DRAM contents are not immediately lost when a PC is powered off. Instead the contents decay rather slowly, in particular if the DRAM chips are cooled to low temperatures. This effect opens an attack vector on cryptographic applications that keep decrypted keys in DRAM. An attacker with access to the target computer can reboot it or remove the RAM modules and quickly copy the RAM contents to non-volatile memory. By exploiting the known cryptographic structure of the cipher and layout of the key data in memory, in our application an AES key schedule with redundancy, the resulting memory image can be searched for sections that could correspond to decayed cryptographic keys; then, the attacker can attempt to reconstruct the original key. However, the runtime of these algorithms grows rapidly with increasing memory image size, error rate and complexity of the bit error model, which limits the practicability of the approach.In this work, we study how the algorithm for key search can be accelerated with custom computing machines. We present an FPGA-based architecture on a Maxeler dataflow computing system that outperforms a software implementation up to 205x, which significantly improves the practicability of cold-attacks against AES.}}, author = {{Riebler, Heinrich and Kenter, Tobias and Sorge, Christoph and Plessl, Christian}}, booktitle = {{Proceedings of the International Conference on Field-Programmable Technology (FPT)}}, keywords = {{coldboot}}, pages = {{386--389}}, publisher = {{IEEE}}, title = {{{FPGA-accelerated Key Search for Cold-Boot Attacks against AES}}}, doi = {{10.1109/FPT.2013.6718394}}, year = {{2013}}, } @inproceedings{505, abstract = {{In this paper we introduce “On-The-Fly Computing”, our vision of future IT services that will be provided by assembling modular software components available on world-wide markets. After suitable components have been found, they are automatically integrated, configured and brought to execution in an On-The-Fly Compute Center. We envision that these future compute centers will continue to leverage three current trends in large scale computing which are an increasing amount of parallel processing, a trend to use heterogeneous computing resources, and—in the light of rising energy cost—energy-efficiency as a primary goal in the design and operation of computing systems. In this paper, we point out three research challenges and our current work in these areas.}}, author = {{Happe, Markus and Kling, Peter and Plessl, Christian and Platzner, Marco and Meyer auf der Heide, Friedhelm}}, booktitle = {{Proceedings of the 9th IEEE Workshop on Software Technology for Future embedded and Ubiquitous Systems (SEUS)}}, publisher = {{IEEE}}, title = {{{On-The-Fly Computing: A Novel Paradigm for Individualized IT Services}}}, doi = {{10.1109/ISORC.2013.6913232}}, year = {{2013}}, } @inproceedings{1787, author = {{Suess, Tim and Schoenrock, Andrew and Meisner, Sebastian and Plessl, Christian}}, booktitle = {{Proc. Int. Symp. on Parallel and Distributed Processing Workshops (IPDPSW)}}, isbn = {{978-0-7695-4979-8}}, pages = {{64--73}}, publisher = {{IEEE Computer Society}}, title = {{{Parallel Macro Pipelining on the Intel SCC Many-Core Computer}}}, doi = {{10.1109/IPDPSW.2013.136}}, year = {{2013}}, } @inproceedings{16017, author = {{Marten, Thorsten and Block, Holger and Tröster, Thomas and Gerber, Thomas and Sikora, Sascha and Lenze, Franz-Josef}}, booktitle = {{Proceedings of the 4th International Conference Hot Sheet Metal Forming of High-Performance Steel}}, editor = {{Oldenburg, Mats and Steinhoff, Kurt}}, location = {{Lulea}}, publisher = {{Verlag Wissenschaftliche Scripten}}, title = {{{Graded Lightweight Structures Through Hot Forming}}}, year = {{2013}}, } @inbook{52417, author = {{Lang, Bastian and Esser, Marco and Nennmann, Thorsten and Schlüter, Alexander}}, booktitle = {{Regionale Klimaanpassung: Herausforderungen – Lösungen – Hemmnisse – Umsetzungen am Beispiel Nordhessens }}, editor = {{Rossnagel, Alexander}}, isbn = {{978-3-86219-660-9}}, publisher = {{Kassel University Press }}, title = {{{Vorausschauende Energiebereitstellung für produzierende Unternehmen }}}, year = {{2013}}, } @phdthesis{52415, author = {{Schlüter, Alexander}}, isbn = {{9783862195169}}, publisher = {{Kassel University Press }}, title = {{{Beitrag zur thermischen Energieversorgung in der Kunststoffverarbeitung - systemische Lösungen und Potenziale}}}, year = {{2013}}, } @misc{52444, author = {{Schlüter, Alexander}}, title = {{{Energieeffizienz in den Produktionsprozessen: Gas und KWK statt Strom für Prozesswärme - Kühlung aus Abwärme. Talk}}}, year = {{2013}}, } @misc{52443, author = {{Schlüter, Alexander}}, title = {{{KWK-gerechte Produktion am Beispiel der Kunststoff- und der Milchverarbeitung}}}, year = {{2013}}, } @article{52469, author = {{Schlüter, Alexander and Phillipp, Matthias and Hesselbach, Jens}}, journal = {{Maschinenmarkt}}, publisher = {{Vogel Communications Group}}, title = {{{Dezentrale Eniergieversorung Kunststoff verarbeitender Betreibe}}}, year = {{2013}}, } @article{13517, author = {{Jesser, Anton and Rohrmüller, Martin and Schmidt, Wolf Gero and Herres-Pawlis, Sonja}}, issn = {{0192-8651}}, journal = {{Journal of Computational Chemistry}}, number = {{1-2}}, pages = {{1--17}}, title = {{{Geometrical and optical benchmarking of copper guanidine-quinoline complexes: Insights from TD-DFT and many-body perturbation theory†}}}, doi = {{10.1002/jcc.23449}}, volume = {{35}}, year = {{2013}}, } @article{13521, author = {{Sanna, S. and Rode, S. and Hölscher, R. and Klassen, S. and Marutschke, C. and Kobayashi, K. and Yamada, H. and Schmidt, Wolf Gero and Kühnle, A.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, title = {{{Charge compensation by long-period reconstruction in strongly polar lithium niobate surfaces}}}, doi = {{10.1103/physrevb.88.115422}}, volume = {{88}}, year = {{2013}}, } @article{13523, author = {{Longo, Roberto C. and Cho, Kyeongjae and Schmidt, Wolf Gero and Chabal, Yves J. and Thissen, Peter}}, issn = {{1616-301X}}, journal = {{Advanced Functional Materials}}, pages = {{3471--3477}}, title = {{{Monolayer Doping via Phosphonic Acid Grafting on Silicon: Microscopic Insight from Infrared Spectroscopy and Density Functional Theory Calculations}}}, doi = {{10.1002/adfm.201202808}}, volume = {{23}}, year = {{2013}}, } @article{13522, author = {{Aldahhak, Hazem and Schmidt, Wolf Gero and Rauls, E.}}, issn = {{0039-6028}}, journal = {{Surface Science}}, pages = {{242--248}}, title = {{{Adsorption of PTCDA on NaCl(100) and KCl(100)}}}, doi = {{10.1016/j.susc.2013.08.003}}, volume = {{617}}, year = {{2013}}, } @article{13518, author = {{Frigge, T. and Wall, S. and Krenzer, B. and Wippermann, St. and Sanna, S. and Klasing, F. and Hanisch-Blicharski, A. and Kammler, M. and Schmidt, Wolf Gero and Horn-von Hoegen, M.}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, pages = {{149602}}, title = {{{Friggeet al.Reply:}}}, doi = {{10.1103/physrevlett.111.149602}}, volume = {{111}}, year = {{2013}}, } @article{13519, author = {{Riefer, A. and Sanna, S. and Schmidt, Wolf Gero}}, issn = {{0015-0193}}, journal = {{Ferroelectrics}}, pages = {{78--85}}, title = {{{LiNb1-xTaxO3Electronic Structure and Optical Response fromFirst-PrinciplesCalculations}}}, doi = {{10.1080/00150193.2013.821904}}, volume = {{447}}, year = {{2013}}, } @article{13528, author = {{George, B. M. and Behrends, J. and Schnegg, A. and Schulze, T. F. and Fehr, M. and Korte, L. and Rech, B. and Lips, K. and Rohrmüller, M. and Rauls, E. and Schmidt, Wolf Gero and Gerstmann, Uwe}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, number = {{13}}, title = {{{Atomic Structure of Interface States in Silicon Heterojunction Solar Cells}}}, doi = {{10.1103/physrevlett.110.136803}}, volume = {{110}}, year = {{2013}}, } @article{13527, author = {{Rohrmüller, M. and Herres-Pawlis, S. and Witte, M. and Schmidt, Wolf Gero}}, issn = {{0192-8651}}, journal = {{Journal of Computational Chemistry}}, pages = {{1035--1045}}, title = {{{Bis-μ-oxo and μ-η2:η2-peroxo dicopper complexes studied within (time-dependent) density-functional and many-body perturbation theory}}}, doi = {{10.1002/jcc.23230}}, volume = {{34}}, year = {{2013}}, } @article{13525, abstract = {{The frequency-dependent dielectric function and the second-order polarizability tensor of ferroelectric LiNbO3 are calculated from first principles. The calculations are based on the electronic structure obtained from density-functional theory. The subsequent application of the GW approximation to account for quasiparticle effects and the solution of the Bethe-Salpeter equation for the stoichiometric material yield a dielectric function that slightly overestimates the absorption onset and the oscillator strength in comparison with experimental measurements. Calculations at the level of the independent-particle approximation indicate that these deficiencies are, at least, partially related to the neglect of intrinsic defects typical for the congruent material. The second-order polarizability calculated within the independent-particle approximation predicts strong nonlinear coefficients for photon energies above 1.5 eV. The comparison with measured data suggests that the inclusion of self-energy effects in the nonlinear optical response leads to a better agreement with experiments. The intrinsic defects of congruent samples reduce the optical nonlinearities, in particular, for the 21 and 31 tensor components, further improving the agreement between experiments and theory.}}, author = {{Riefer, Arthur and Sanna, Simone and Schindlmayr, Arno and Schmidt, Wolf Gero}}, issn = {{1550-235X}}, journal = {{Physical Review B}}, number = {{19}}, publisher = {{American Physical Society}}, title = {{{Optical response of stoichiometric and congruent lithium niobate from first-principles calculations}}}, doi = {{10.1103/PhysRevB.87.195208}}, volume = {{87}}, year = {{2013}}, }