TY - GEN A1 - Funke, Kira A1 - Müller, Regine ED - Elzer, Reinhard T1 - Teilhabe ermöglichen: Förderprogramm gestartet T2 - Jugendhilfe-Report: Informationen aus dem Landesjugendamt Rheinland KW - Teilhabe KW - Förderungsprogramm KW - Landschaftsverband Rheinland Y1 - 2011 UR - https://web.archive.org/web/20160909103354/https://www.lvr.de/media/wwwlvrde/jugend/service/publikationen/dokumente_97/Jugendhilfereport_4_2011.pdf VL - 4/11 SP - 32 EP - 35 ER - TY - JOUR A1 - Nehr, Sascha A1 - Bohn, Birger A1 - Fuchs, Hendrik A1 - Hofzumahaus, Andreas A1 - Wahner, Andreas T1 - HO2 formation from the OH + benzene reaction in the presence of O2 JF - Physical Chemistry Chemical Physics KW - Luftreinhaltung Y1 - 2011 U6 - https://doi.org/10.1039/c1cp20334g SN - 1463-9076 VL - 13 IS - 22 PB - Royal Society of Chemistry (RSC) ER - TY - JOUR A1 - Fuchs, H. A1 - Bohn, Birger A1 - Hofzumahaus, A. A1 - Holland, F. A1 - Lu, K. D. A1 - Nehr, Sascha A1 - Rohrer, F. A1 - Wahner, A. T1 - Detection of HO2 by laser-induced fluorescence: calibration and interferences from RO2 radicals JF - Atmospheric Measurement Techniques N2 - Abstract. HO2 concentration measurements are widely accomplished by chemical conversion of HO2 to OH including reaction with NO and subsequent detection of OH by laser-induced fluorescence. RO2 radicals can be converted to OH via a similar radical reaction sequence including reaction with NO, so that they are potential interferences for HO2 measurements. Here, the conversion efficiency of various RO2 species to HO2 is investigated. Experiments were conducted with a radical source that produces OH and HO2 by water photolysis at 185 nm, which is frequently used for calibration of LIF instruments. The ratio of HO2 and the sum of OH and HO2 concentrations provided by the radical source was investigated and was found to be 0.50 ± 0.02. RO2 radicals are produced by the reaction of various organic compounds with OH in the radical source. Interferences via chemical conversion from RO2 radicals produced by the reaction of OH with methane and ethane (H-atom abstraction) are negligible consistent with measurements in the past. However, RO2 radicals from OH plus alkene- and aromatic-precursors including isoprene (mainly OH-addition) are detected with a relative sensitivity larger than 80 % with respect to that for HO2 for the configuration of the instrument with which it was operated during field campaigns. Also RO2 from OH plus methyl vinyl ketone and methacrolein exhibit a relative detection sensitivity of 60 %. Thus, previous measurements of HO2 radical concentrations with this instrument were biased in the presence of high RO2 radical concentrations from isoprene, alkenes or aromatics, but were not affected by interferences in remote clean environment with no significant emissions of biogenic VOCs, when the OH reactivity was dominated by small alkanes. By reducing the NO concentration and/or the transport time between NO addition and OH detection, interference from these RO2 species are suppressed to values below 20 % relative to the HO2 detection sensitivity. The HO2 conversion efficiency is also smaller by a factor of four, but this is still sufficient for atmospheric HO2 concentration measurements for a wide range of conditions. KW - Luftreinhaltung Y1 - 2011 U6 - https://doi.org/10.5194/amt-4-1209-2011 SN - 1867-8548 VL - 4 IS - 6 SP - 1209 EP - 1225 PB - Copernicus ER - TY - JOUR A1 - Curcic, Michael A1 - Stoll, Hermann A1 - Weigand, Markus A1 - Sackmann, Vitalij A1 - Juellig, Patrick A1 - Kammerer, Matthias A1 - Noske, Matthias A1 - Sproll, Markus A1 - Van Waeyenberge, Bartel A1 - Vansteenkiste, Arne A1 - Woltersdorf, Georg A1 - Tyliszczak, Tolek A1 - Schütz, Gisela T1 - Magnetic vortex core reversal by rotating magnetic fields generated on micrometer length scales JF - physica status solidi (b) N2 - AbstractUnidirectional switching of the magnetic vortex core can be achieved in micron‐sized ferromagnetic platelets by excitation of the gyrotropic mode of the vortex structure with in‐plane rotating magnetic fields. Circulating fields with a switchable sense of rotation (clockwise, CW or counter clockwise, CCW) have been generated on a micrometer length scale at frequencies up to 1 GHz by two orthogonal electric RF currents with 90° phase shift flowing through crossed but not isolated striplines. Decoupling of these currents is realized by balanced symmetric RF sources. The amplitudes of the rotating magnetic fields and their spatial distributions are calculated and the stripline geometry is discussed. By taking advantage of this technique, unidirectional vortex core reversal by excitation with CW or CCW rotating magnetic fields has been observed by time resolved scanning transmission X‐ray microscopy. An area with reversed magnetization, the “dip,” was observed near the vortex core before vortex core reversal. Y1 - 2011 U6 - https://doi.org/10.1002/pssb.201147208 SN - 0370-1972 N1 - Acknowledgements Cooperation and many fruitful discussions with Manfred Fähnle are gratefully acknowledged. The use of the STXM (beamline 11.0.2) at the Advanced Light Source, Berkeley, was supported by the Director, Office of Science, Office of Basic Energy Sciences, Materials Sciences, and Engineering Division, US Department of Energy. VL - 248 IS - 10 SP - 2317 EP - 2322 PB - Wiley ER - TY - JOUR A1 - Kammerer, Matthias A1 - Weigand, Markus A1 - Curcic, Michael A1 - Noske, Matthias A1 - Sproll, Markus A1 - Vansteenkiste, Arne A1 - Van Waeyenberge, Bartel A1 - Stoll, Hermann A1 - Woltersdorf, Georg A1 - Back, Christian H. A1 - Schuetz, Gisela T1 - Magnetic vortex core reversal by excitation of spin waves JF - Nature Communications Y1 - 2011 U6 - https://doi.org/10.1038/ncomms1277 SN - 2041-1723 VL - 2 IS - 1 PB - Springer Nature ER - TY - JOUR A1 - Zimmermann, Peter A1 - Neumann, Anna A1 - Çelik, Fatma A1 - Kindler, Heinz T1 - Sexuelle Gewalt gegen Kinder in Familien - Ein Forschungsüberblick JF - Sexuologie. Zeitschrift für Sexualmedizin, Sexualtherapie und Sexualwissenschaft Y1 - 2011 U6 - https://doi.org/10.61387/S.2011.34.16 SN - 0944-7105 VL - 18 IS - 34 SP - 119 EP - 142 PB - Deutsche Gesellschaft für Sexualmedizin, Sexualtherapie und Sexualwissenschaft ER - TY - CHAP A1 - Zimmermann, Peter A1 - Çelik, Fatma A1 - Iwanski, Alexandra A1 - Mohr, C. A1 - Neumann, Anna ED - Renate, Walthes ED - Renate, Hinz T1 - Persönlichkeitsunterschiede und ihre Auswirkungen im schulischen Kontext T2 - Verschiedenheit als Diskurs Y1 - 2011 SN - 978-3-7720-8401-0 SP - 151 EP - 162 PB - Narr Francke Attempto CY - Tübingen ER - TY - CHAP A1 - Grote, Wolfgang A1 - Kastsian, Darya A1 - Mönnigmann, Martin T1 - Optimal power system unit commitment with guaranteed local stability T2 - Proceedings of the 2011 American Control Conference N2 - This article deals with the cost optimal commitment of power systems. System stability is often only considered after solving the commitment problem. We show by example that a cost optimization may result in a mode of operation that, while economically optimal, is unstable or has otherwise unacceptable dynamics. As a remedy, we propose to use the so-called normal vector method, which has been developed for the optimization of nonlinear dynamical systems with stability boundaries and uncertain parameters. We apply the method to a small sample power grid, where the optimization goal is to minimize the energy production costs for a given power consumption. KW - Optimization KW - Power system stability KW - Robustness Y1 - 2011 U6 - https://doi.org/10.1109/ACC.2011.5991058 SN - 2378-5861 SP - 4526 EP - 4531 PB - IEEE ER - TY - CHAP A1 - Nielsen, L. A1 - Leithner, R. A1 - Qi, D. A1 - Grote, Wolfgang A1 - Kastsian, Darya A1 - Mönnigmann, Martin T1 - Isobares GuD - Druckluftspeicherkraftwerk mit Wärmespeicher T2 - Energy Storage Conference and Exhibition (IRES 2011), Berlin. 2011 Y1 - 2011 N1 - Veröffentlichung als Poster CY - Berlin ER - TY - CHAP A1 - Müller, Dennis A1 - Pauli, Josef A1 - Meuter, Mirko A1 - Ghosh, Lali A1 - Müller-Schneiders, Stefan T1 - A generic video and radar data fusion system for improved target selection T2 - 2011 IEEE Intelligent Vehicles Symposium (IV) Y1 - 2011 SN - 978-1-4577-0891-6 U6 - https://doi.org/10.1109/IVS.2011.5940469 SP - 679 EP - 684 PB - IEEE ER -