@article{19129, author = {{Caylak, Ismail and Mahnken, Rolf and Widany, Kai-Uwe}}, issn = {{1617-7061}}, journal = {{PAMM}}, pages = {{201--202}}, title = {{{Stabilized mixed triangular finite elements at large deformations using area bubble functions}}}, doi = {{10.1002/pamm.201110092}}, year = {{2011}}, } @inbook{19133, author = {{Mahnken, Rolf and Caylak, Ismail}}, booktitle = {{Advances in Extended and Multifield Theories for Continua}}, isbn = {{9783642227370}}, issn = {{1613-7736}}, title = {{{Optical Measurements for a Cold-Box Sand and Aspects of Direct and Inverse Problems for Micropolar Elasto-Plasticity}}}, doi = {{10.1007/978-3-642-22738-7_9}}, year = {{2011}}, } @article{19113, author = {{Caylak, Ismail and Mahnken, Rolf}}, issn = {{0029-5981}}, journal = {{International Journal for Numerical Methods in Engineering}}, pages = {{218--242}}, title = {{{Stabilization of mixed tetrahedral elements at large deformations}}}, doi = {{10.1002/nme.3320}}, year = {{2011}}, } @book{19328, author = {{Mahnken, Rolf}}, isbn = {{9783642198373}}, issn = {{0937-7433}}, title = {{{Lehrbuch der Technischen Mechanik - Dynamik}}}, doi = {{10.1007/978-3-642-19838-0}}, year = {{2011}}, } @article{39735, author = {{Lorenz, Alexander and Kitzerow, Heinz-Siegfried}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, keywords = {{Physics and Astronomy (miscellaneous)}}, number = {{24}}, publisher = {{AIP Publishing}}, title = {{{Efficient electro-optic switching in a photonic liquid crystal fiber}}}, doi = {{10.1063/1.3599848}}, volume = {{98}}, year = {{2011}}, } @inproceedings{38221, author = {{Al-Bermani, Ali and Woerdehoff, Christian and Hoffmann, Sebastian and Rueckert, Ulrich and Noé, Reinhold}}, booktitle = {{Photonic Networks, 12 . ITG Symposium}}, pages = {{1--3}}, title = {{{Synchronous 16-QAM Transmission in a FPGA-Based Coherent Receiver with Different Phase Estimation Filter Lengths}}}, year = {{2011}}, } @article{40236, author = {{Meier-Gräwe, Uta and Wagenknecht, Inga}}, journal = {{Frühe Kindheit}}, number = {{3}}, pages = {{46--47}}, publisher = {{Deutsche Liga für das Kind in Familie und Gesellschaft e. V.}}, title = {{{Frühe Hilfen sind eine Zukunftsinvestition. Eine Kosten-Nutzen-Analyse im Projekt „Guter Start ins Kinderleben“ im Auftrag des Nationalen Zentrums Frühe Hilfen}}}, volume = {{14}}, year = {{2011}}, } @inproceedings{40086, author = {{Fichlter, Philip and Förster, Sabrina and Niebuhr-Siebert, Sandra and Nowak, Miriam and Hellmich, Frank}}, title = {{{Evaluation eines Förderprogramms zur Entwicklung wortschatzbasierter Lesestrategien bei Kindern in der Grundschule. Posterpräsentation auf der 20. Jahrestagung der Kommission "Grundschulforschung und Pädagogik der Primarstufe" der Deutschen Gesellschaft für Erziehungswissenschaft (DGfE, Sektion Schulpädagogik)}}}, year = {{2011}}, } @inproceedings{40087, author = {{Berger, Jennifer and Hellmich, Frank}}, title = {{{Selbstwirksamkeitsüberzeugungen und Hilflosigkeitserleben bei Lehramtsstudentinnen und -studenten im Zusammenhang mit ihren Diagnosekompetenzen. Vortrag auf der 20. Jahrestagung der Kommission "Grundschulforschung und Pädagogik der Primarstufe" der Deutschen Gesellschaft für Erziehungswissenschaft (DGfE, Sektion Schulpädagogik)}}}, year = {{2011}}, } @inproceedings{38246, author = {{Hellmich, Frank}}, publisher = {{Universität Paderborn}}, title = {{{Adaptives Lernverhalten von Grundschulkindern im Zusammenhang mit ihren impliziten Fähigkeitstheorien und Fähigkeitsselbstkonzepten. Vortrag im Rahmen des Kolloquiums "Grundschulpädagogik und Grundschuldidaktik"}}}, year = {{2011}}, } @inproceedings{40088, author = {{Koch, Katja and Hellmich, Frank}}, title = {{{Moderation des Symposiums „Förderung von Kindern mit Migrationshintergrund im Vor- und Grundschulbereich“. 20. Jahrestagung der Kommission "Grundschulforschung und Pädagogik der Primarstufe" der Deutschen Gesellschaft für Erziehungswissenschaft (DGfE, Sektion Schulpädagogik)}}}, year = {{2011}}, } @inproceedings{38245, author = {{Hellmich, Frank}}, publisher = {{Universität Wuppertal}}, title = {{{(Mal-)Adaptives Lernverhalten von Grundschulkindern in Abhängigkeit ihrer impliziten Fähigkeitstheorien und Fähigkeitsselbstkonzepte}}}, year = {{2011}}, } @inproceedings{38247, author = {{Hellmich, Frank}}, title = {{{Implizite Fähigkeitstheorien, Fähigkeitsselbstkonzepte und (mal-)adaptives Lernverhalten bei Kindern im Grundschulalter. Vortrag auf der 75. Tagung der Arbeitsgruppe für Empirische Pädagogische Forschung (AEPF)}}}, year = {{2011}}, } @misc{40339, author = {{Wallmeier, Nadine}}, booktitle = {{Niederdeutsches Jahrbuch}}, pages = {{180--183}}, title = {{{[Sammelrezension:] Das Hamburger Ordeelbook von 1270 samt Schiffrecht. Nach der Handschrift von Fredericus Varendorp von 1493 (Kopenhagener Codex). Textausgabe und Übersetzung ins Hochdeutsche mit rechtsgeschichtlichem Kommentar. Hrsg. von Frank Eichler. Hamburg: Mauke; Das Hamburger Ordeelbook in der Erstfassung 1270. Rechtshistorische und sprachliche Rekonstruktion aus den vorhandenen Quellen. Hrsg. von Frank Eichler. Hamburg: Mauke 2007; Die Langenbeck’sche Glosse zum Hamburger Stadtrecht von 1497. Die vollständige Glossenhandschrift von Bartholdus Eggheman von 1532 sowie Lappenbergs Auszüge aus späteren Handschriften. Hrsg. und übersetzt von Frank Eichler. Mit Einführungen von Frank Eichler und Tilman Repgen. Hamburg: Mauke 2008.}}}, volume = {{134}}, year = {{2011}}, } @misc{40343, author = {{Wallmeier, Nadine}}, booktitle = {{Daphnis}}, pages = {{723--725}}, title = {{{Mihm, Magret / Mihm, Arend: Mittelalterliche Stadtrechnungen im historischen Prozess. Die älteste Duisburger Überlieferung (1348-1449). Band 1: Untersuchungen und Texte. Köln, Weimar, Wien: Böhlau 2007. Band 2: Register, Materialien, Glossar. Köln, Weimar, Wien: Böhlau 2007}}}, volume = {{40}}, year = {{2011}}, } @article{40073, author = {{Luks, Tomasz}}, issn = {{0039-3223}}, journal = {{Studia Mathematica}}, number = {{1}}, pages = {{39--62}}, publisher = {{Institute of Mathematics, Polish Academy of Sciences}}, title = {{{Hardy spaces for the Laplacian with lower order perturbations}}}, doi = {{10.4064/sm204-1-3}}, volume = {{204}}, year = {{2011}}, } @inproceedings{40835, abstract = {{This work addresses the problem of deciding whether a set of realizations of a vector-valued time series with unknown temporal correlation are spatially correlated or not. Specifically, the spatial correlation is induced by a colored source over a frequency-flat single-input multiple-output (SIMO) channel distorted by independent and identically distributed noises with temporal correlation. The generalized likelihood ratio test (GLRT) for this detection problem does not have a closed-form expression and we have to resort to numerical optimization techniques. In particular, we apply the successive convex approximations approach which relies on solving a series of convex problems that approximate the original (non-convex) one. The proposed solution resembles a power method for obtaining the dominant eigenvector of a matrix, which changes over iterations. Finally, the performance of the proposed detector is illustrated by means of computer simulations showing a great improvement over previously proposed detectors that do not fully exploit the temporal structure of the source.}}, author = {{Ramírez, D. and Vía, J. and Santamaría, I. and Scharf, L. L.}}, booktitle = {{Proc.\ IEEE Int.\ Conf.\ Acoustics, Speech and Signal Process.}}, title = {{{Multiple-Channel Detection of a Gaussian Time Series over Frequency-Flat Channels}}}, doi = {{10.1109/ICASSP.2011.5947194}}, year = {{2011}}, } @inproceedings{40834, abstract = {{Spectrum sensing is a challenging key component of the Cognitive Radio paradigm, since primary signals must be detected in the face of noise uncertainty and at signal-to-noise ratios (SNRs) well below decodability levels. Multiantenna detectors exploit spatial independence of receiver thermal noise to boost detection performance and robustness. Here, we study the problem of detecting Gaussian signals with unknown rank-$P$ spatial covariance matrix when the noise at the receiver is independent across the antennas and with unknown power. A generic diagonal noise covariance matrix is allowed to model calibration uncertainties in the different antenna frontends. We derive the generalized likelihood ratio test (GLRT) for this detection problem. Although, in general, the corresponding statistic must be obtained by numerical means, in the low SNR regime the GLRT does admit a closed form. Numerical simulations show that the proposed asymptotic detector offers good performance even for moderate SNR values.}}, author = {{Ramírez, D. and Vazquez-Vilar, G. and López-Valcarce, R. and Vía, J. and Santamaría, I.}}, booktitle = {{Proc.\ IEEE Int.\ Conf.\ Acoustics, Speech and Signal Process.}}, title = {{{Multiantenna detection under noise uncertainty and primary user’s spatial structure}}}, doi = {{10.1109/ICASSP.2011.5946275}}, year = {{2011}}, } @inproceedings{40833, abstract = {{In this work, we derive a maximum likelihood formula for beamsteering in a multi-sensor array. The novelty of the work is that the impinging signal and noises are wide sense stationary (WSS) time series with unknown power spectral densities, unlike in previous work that typically considers white signals. Our approach naturally provides a way of fusing frequency-dependent information to obtain a broadband beamformer. In order to obtain the compressed likelihood, it is necessary to find the maximum likelihood estimates of the unknown parameters. However, this problem turns out to be an ML estimation of a block-Toeplitz matrix, which does not have a closed-form solution. To overcome this problem, we derive the asymptotic likelihood, which is given in the frequency domain. Finally, some simulation results are presented to illustrate the performance of the proposed technique. In these simulations, it is shown that our approach presents the best results.}}, author = {{Ramírez, D. and Vía, J. and Santamaría, I. and Scharf, L. L.}}, booktitle = {{Proc.\ IEEE Work.\ Stat.\ Signal Process.}}, title = {{{Multi-Sensor Beamsteering Based on the Asymptotic Likelihood for Colored Signals}}}, doi = {{10.1109/SSP.2011.5967644}}, year = {{2011}}, } @inproceedings{40836, abstract = {{In this paper we study the multiple-input multiple-output two-way relay channel (MIMO-TWRC) when the nodes use analog beamforming. Following the amplify-and-forward (AF) strategy, the problem consists of finding the transmit and receive beamformers of the nodes and the relay, and the power allocated to each one, that achieve the boundary of the capacity region. We express the optimal node beamformers in terms of the relay beamformers, and show that the capacity region can be efficiently characterized using convex optimization techniques. Numerical examples are provided to illustrate the results of this paper, and to compare the capacity region achieved by analog beamforming against the conventional MIMO schemes that operate at the baseband.}}, author = {{Lameiro, Christian and Nazábal, Alfredo and Gholam, Fouad and Vía, Javier and Santamaría, Ignacio}}, booktitle = {{Proc. Int. ICST Conf. Mobile Lightweight Wireless Syst.}}, title = {{{Capacity Region of the Two-Way Multi-Antenna Relay Channel with Analog Tx-Rx Beamforming}}}, doi = {{10.1007/978-3-642-29479-2_1}}, year = {{2011}}, }