@inbook{43841, author = {{Schroeter-Wittke, Harald and Marti, Andreas }}, booktitle = {{Reformierte Liturgik - kontrovers}}, editor = {{Kunz, Ralph and Marti, Andreas and Plüss, David }}, pages = {{261--276}}, title = {{{Hochkultur oder Popkultur?}}}, year = {{2011}}, } @inbook{43838, author = {{Schroeter-Wittke, Harald}}, booktitle = {{Religionssensible Schulkultur}}, editor = {{Guttenberger, Gudrun and Schroeter-Wittke, Harald}}, pages = {{117--131}}, title = {{{Religionssensible Musik - Eine Klangreise}}}, year = {{2011}}, } @inbook{43836, author = {{Schroeter-Wittke, Harald}}, booktitle = {{Religionssensible Schulkultur}}, editor = {{Guttenberger, Gudrun and Schroeter-Wittke, Harald}}, pages = {{21--29}}, title = {{{Was ist Religionssensibilität?}}}, year = {{2011}}, } @inproceedings{4312, abstract = {{The intensity dependence of optically-induced injection currents in semiconductor quantum wells is investigated numerically. Oscillatory behavior of the electron charge current transients as function of intensity and time is predicted and explained.}}, author = {{Pochwala, Michal and Duc, Huynh Thanh and Förstner, Jens and Meier, Torsten}}, booktitle = {{CLEO:2011 - Laser Applications to Photonic Applications}}, isbn = {{9781557529107}}, issn = {{2160-8989 }}, keywords = {{tet_topic_qw}}, location = {{Baltimore, Maryland (USA)}}, publisher = {{Optical Society of America}}, title = {{{Intensity dependence of optically-induced injection currents in semiconductor quantum wells}}}, doi = {{10.1364/qels.2011.qmk4}}, year = {{2011}}, } @inproceedings{4043, abstract = {{We present numerical results of the mutual coupling between photonic crystal cavities and semiconductor quantum dots. Normal mode splitting between a single cavity mode and a single quantum dot is shown under weak excitation, while under strong excitation Q‐factor dependent side bands appear, according to the AC‐Stark effect. Coupled photonic crystals, aligned parallel but displaced under a 30°‐angle for efficient coupling, show line splittings of all eigenmodes, if a single eigenmode is resonantly coupled to a single quantum dot. The mutual coupling of N resonant quantum dots to a single cavity mode results in a N−−√ scaling of the splitting, known from quantum optics, but corrected by the field amplitude fraction for not collocated quantum dots.}}, author = {{Declair, S. and Song, X. and Meier, Torsten and Förstner, Jens}}, booktitle = {{THE FOURTH INTERNATIONAL WORKSHOP 2011}}, keywords = {{tet_topic_phc, tet_topic_qd}}, location = {{Bad Honnef}}, number = {{123}}, pages = {{123--125}}, publisher = {{AIP}}, title = {{{Simulation of Mutual Coupling of Photonic Crystal Cavity Modes and Semiconductor Quantum Dots}}}, doi = {{10.1063/1.3644232}}, volume = {{1398}}, year = {{2011}}, } @article{44059, abstract = {{A novel adaptive wavelet based method is presented that allows us to compute eigenvalues and eigenvectors of the electronic Schrödinger equation. Our method outperforms direct discretization methods with equidistant grid spacings, in particular, for problems that involve several length scales. As an application we present numerical evaluations of the energetically lowest exciton states for ordered and disordered semiconductor quantum wires.}}, author = {{Meier, Torsten and Mollet, Christian and Kunoth, Angela}}, journal = {{AIP Conference Proceedings}}, number = {{1}}, pages = {{156--158}}, publisher = {{American Institute of Physics}}, title = {{{Wavelet‐Based Adaptive Computations of the Excitonic Eigenstates of Disordered Semiconductor Quantum Wires}}}, doi = {{10.1063/1.3644243}}, volume = {{1398}}, year = {{2011}}, } @inproceedings{4048, abstract = {{We present an ab-initio method for calculating nonlinear and nonlocal optical effects in metallic slabs with sub-wavelength thickness. We find a strong localization of the second-harmonic current at the metal-vacuum interface.}}, author = {{Wand, Mathias and Schindlmayr, Arno and Meier, Torsten and Förstner, Jens}}, booktitle = {{CLEO:2011 - Laser Applications to Photonic Applications }}, isbn = {{978-1-4577-1223-4}}, issn = {{2160-8989}}, keywords = {{tet_topic_shg}}, location = {{Baltimore, Maryland, United States}}, publisher = {{Optical Society of America}}, title = {{{Theoretical approach to the ultrafast nonlinear optical response of metal slabs}}}, doi = {{10.1364/CLEO_AT.2011.JTuI59}}, year = {{2011}}, } @article{21456, abstract = {{This article will highlight various aspects of the production process of high performance active elements made of ultra high-strength steels. Focus is put on the processing of thick sheet metal regarding hot forming by means of punching, embossing, and forging processes as well as on thermo-mechanical treatment. Due to the material thickness of the semi-finished parts/blanks used and owing to the high strength of the materials (Rm > 2600 MPa) current production techniques and parameters from the field of thin sheet metal can only be limitedly be transferred and have therefore been specially investigated for this application.}}, author = {{Homberg, Werner and Rostek, Tim}}, issn = {{1662-9795}}, journal = {{Key Engineering Materials}}, pages = {{229--234}}, title = {{{High Performance Active Elements for Agricultural Machines Made of Ultra High-Strength Steels}}}, doi = {{10.4028/www.scientific.net/kem.473.229}}, year = {{2011}}, } @inproceedings{21472, author = {{Mennecart, Thomas and Rostek, Tim and Witulski, Jörg and Brosius, Alexander and Takkaya, A. Erman and Homberg, Werner}}, publisher = {{Meisenbach}}, title = {{{Presshärten von Rohren und Profilen mittels formlos fester Stoffe}}}, year = {{2011}}, } @inproceedings{21474, author = {{Homberg, Werner and Rostek, Tim}}, booktitle = {{Proceedings. of the 10th International Conference on Technology of Plasticity (ICTP)}}, publisher = {{Springer}}, title = {{{High Performance Active Elements for Agricultural Machines Made of Ultra High-Strength Steels}}}, year = {{2011}}, } @article{41658, author = {{Fuchs, Christian}}, journal = {{Sociology Compass}}, number = {{6}}, pages = {{480--487}}, title = {{{Teaching & Learning Guide for: New Media, Web 2.0 and Surveillance}}}, volume = {{5}}, year = {{2011}}, } @article{41657, author = {{Fuchs, Christian}}, journal = {{Sociology Compass}}, number = {{2}}, pages = {{134--147}}, title = {{{New Media, Web 2.0 and Surveillance}}}, volume = {{5}}, year = {{2011}}, } @inbook{42407, author = {{Fuchs, Christian}}, booktitle = {{İletişimi anlamak (Understanding communication), 4th revised}}, editor = {{Erdogan, İrfan}}, pages = {{15--20}}, publisher = {{Pozitif}}, title = {{{Preface}}}, year = {{2011}}, } @techreport{42723, author = {{Fuchs, Christian}}, issn = {{2219-603X}}, publisher = {{Unified Theory of Information Research Group. The Internet & Surveillance Research Paper No.9}}, title = {{{The Political Economy of Privacy on Facebook}}}, year = {{2011}}, } @techreport{42724, author = {{Fuchs, Christian}}, issn = {{2219-603X}}, publisher = {{Unified Theory of Information Research Group. The Internet & Surveillance Research Paper No.8}}, title = {{{The Political Economy of Privacy}}}, year = {{2011}}, } @techreport{42722, author = {{Sevignani, Sebastian and Kreilinger, Verena and Allmer, Thomas and Fuchs, Christian}}, issn = {{2219-603X}}, publisher = {{Unified Theory of Information Research Group. SNS3 Research Paper No.10}}, title = {{{Analysis of Existing Empirical Research Methods for Studying (Online) Privacy and Surveillance}}}, year = {{2011}}, } @article{25962, abstract = {{We report the correlation of the aging of Pd-doped SnO2 methane sensors with the change of the oxidation state of Pd. Mesoporous SnO2 doped with palladium species was prepared and exposed to different gas mixtures at high temperature (600 °C) to simulate long term usage. After each exposure step a fraction of the sample was cooled down to “freeze” the current oxidation state of Pd which was then analyzed by X-ray Absorption Near-Edge Spectroscopy (XANES) using the 'white line' (i.e. the absorption peak corresponding to the transition from the 2p3/2 core level to unoccupied 4 d states) intensity of the L(III) edge as a probe for the oxidation state. The Pd oxidation state correlates with the response of the resistive SnO2 sensor to methane gas, as determined by measuring the gas response to different concentrations of methane. Samples treated with 5000 ppm methane in air show a significant reduction of Pd(II) to Pd(0), depending clearly on the carrier gas (synthetic air, pure nitrogen) and on the temperature (600 °C vs. 300 °C).}}, author = {{Wagner, T. and Bauer, M. and Sauerwald, T. and Kohl, C.-D. and Tiemann, Michael}}, issn = {{0040-6090}}, journal = {{Thin Solid Films}}, pages = {{909--912}}, title = {{{X-ray absorption near-edge spectroscopy investigation of the oxidation state of Pd species in nanoporous SnO2 gas sensors for methane detection}}}, doi = {{10.1016/j.tsf.2011.04.187}}, year = {{2011}}, } @article{25964, abstract = {{Capacitive sensors are the most commonly used devices for the detection of humidity because they are inexpensive and the detection mechanism is very specific for humidity. However, especially for industrial processes, there is a lack of dielectrics that are stable at high temperature (>200 °C) and under harsh conditions. We present a capacitive sensor based on mesoporous silica as the dielectric in a simple sensor design based on pressed silica pellets. Investigation of the structural stability of the porous silica under simulated operating conditions as well as the influence of the pellet production will be shown. Impedance measurements demonstrate the utility of the sensor at both low (90 °C) and high (up to 210 °C) operating temperatures.}}, author = {{Wagner, Thorsten and Krotzky, Sören and Weiß, Alexander and Sauerwald, Tilman and Kohl, Claus-Dieter and Roggenbuck, Jan and Tiemann, Michael}}, issn = {{1424-8220}}, journal = {{Sensors}}, pages = {{3135--3144}}, title = {{{A High Temperature Capacitive Humidity Sensor Based on Mesoporous Silica}}}, doi = {{10.3390/s110303135}}, year = {{2011}}, } @article{25963, abstract = {{We report the synthesis of mesoporous tin dioxide (SnO2) materials with well-defined particle morphology. The products consist of uniform spheres with a diameter of 5 μm. The spheres are hierarchically porous with two distinct pore modes of 5.0 nm and 52 nm, respectively. This special porosity is the result of a synthesis procedure which involves a ‘hard templating’ (nanocasting) process. The product forms an approximately homogeneous monolayer of spheres on a sensor substrate and shows promising response to methane gas with low cross-sensitivity to water. The structural properties and gas-sensing performance are compared with a mesoporous SnO2 material without defined morphology, prepared by a ‘soft templating’ procedure.}}, author = {{Smått, J.-H. and Lindén, M. and Wagner, T. and Kohl, C.-D. and Tiemann, Michael}}, issn = {{0925-4005}}, journal = {{Sensors and Actuators B: Chemical}}, pages = {{483--488}}, title = {{{Micrometer-sized nanoporous tin dioxide spheres for gas sensing}}}, doi = {{10.1016/j.snb.2010.12.051}}, year = {{2011}}, } @article{25961, abstract = {{Mesoporous In2O3, synthesized by a nanocasting procedure, is used as a resistive gas sensor for ozone in very low concentrations (from 20 ppb to 2.4 ppm) at room temperature. Its sensing performance is substantially increased by illumination with blue light (460 nm, 2.7 eV). For low ozone concentrations the sensor response increases with increasing humidity. However, higher humidity also results in the occurrence of a saturation of the response at lower ozone concentrations; this is rationalized by assuming a poisoning of surface active sites by hydroxyl groups.}}, author = {{Wagner, T. and Hennemann, J. and Kohl, C.-D. and Tiemann, Michael}}, issn = {{0040-6090}}, journal = {{Thin Solid Films}}, pages = {{918--921}}, title = {{{Photocatalytic ozone sensor based on mesoporous indium oxide: Influence of the relative humidity on the sensing performance}}}, doi = {{10.1016/j.tsf.2011.04.181}}, year = {{2011}}, }