@inproceedings{40797, author = {{Stein, Manuel and Mezghani, Amine and Nossek, Josef A.}}, booktitle = {{Proc.\ ITG Int.\ Work. Smart Ant.}}, title = {{{Quantization-loss analysis for array signal-source localization}}}, year = {{2013}}, } @inproceedings{40801, author = {{Wendler, Friederike and Stein, Manuel and Mezghani, Amine and Nossek, Josef A.}}, booktitle = {{ION Int.\ Tech. Meet.}}, title = {{{Quantization-loss reduction for 1-bit BOC positioning}}}, year = {{2013}}, } @article{40785, abstract = {{Two concerns often arise simultaneously when applying linear estimation in communication systems: the computational complexity can be prohibitively high when the system size is large, and the performance may degrade dramatically when the presumed model is mismatched with the actual system. In this paper, we introduce a subspace expansion framework to jointly address these concerns, in which the observation is first projected onto a lower-dimensional subspace and then the solution of the projected problem is regularized. We discuss two projection methods based on eigensubspace and Krylov subspace expansions. We show that the Krylov subspace projection provides an economical solution to regularized linear estimation. We also compare different regularization methods, such as principal components and diagonal loading. We show that diagonal loading generally outperforms other alternatives and that Krylov subspace rank reduction can yield a regularization effect close to diagonal loading. Finally, we investigate the impact of preconditioning on the performance and complexity for mismatched modeling and propose a loaded preconditioner, which can reduce complexity as well as preserve the regularization effect. Under the proposed framework, various regularization schemes are studied and some guidelines for choosing the right scheme are provided.}}, author = {{Tong, Jun and Schreier, Peter J.}}, journal = {{Signal Process.}}, number = {{9}}, pages = {{2671–2686}}, title = {{{A unified framework for regularized linear estimation in communication systems}}}, doi = {{10.1016/j.sigpro.2013.03.002}}, volume = {{93}}, year = {{2013}}, } @inproceedings{40781, abstract = {{This article is concerned with global asymptotic stability (GAS) of dynamical networks. The case when subsystems are integral input-to-state stable (iISS) has been recognized as notoriously difficult to deal with in the literature. In fact, the lack of energy dissipation for large input denies direct application of the small-gain argument for input-to-state stable (ISS) subsystems. Here for networks consisting of iISS subsystems it is demonstrated that a two-phase approach allows us to make use of the ISS small-gain argument by separating a trajectory into a transient and a subsequent convergence. In contrast to the previous iISS results, the two-phase approach immediately leads to a sufficient criterion for GAS of general nonlinear networks in a matrix-like form (order condition).}}, author = {{Ito, Hiroshi and Rüffer, Björn S.}}, booktitle = {{Proc. IEEE American Contr. Conf.}}, pages = {{4838–4843}}, title = {{{A Two-Phase Approach to Stability of Networks Given in iISS Framework: Utilization of a Matrix-Like Criterion}}}, year = {{2013}}, } @article{40782, abstract = {{Two similar stability notions are considered; one is the long established notion of convergent systems, the other is the younger notion of incremental stability. Both notions require that any two solutions of a system converge to each other. Yet these stability concepts are different, in the sense that none implies the other, as is shown in this paper using two examples. It is shown under what additional assumptions one property indeed implies the other. Furthermore, this paper contains necessary and sufficient characterizations of both properties in terms of Lyapunov functions.}}, author = {{Rüffer, Björn S. and van de Wouw, Nathan and Mueller, Markus}}, journal = {{Systems Control Lett.}}, pages = {{277–285}}, title = {{{Convergent Systems vs. Incremental Stability}}}, doi = {{10.1016/j.sysconle.2012.11.015}}, volume = {{62}}, year = {{2013}}, } @inproceedings{40779, abstract = {{This paper provides sufficient conditions for the incremental stability of time-delayed nonlinear systems. It relies on the Razumikhin-Lyapunov approach, which consists in invoking small-gain arguments by treating the delayed state as a feedback perturbation. The results are valid for multiple delays, as well as bounded time-varying delays. We provide conditions under which the limit solution of a time-delayed nonlinear system to a periodic (resp. constant) input is itself periodic and of the same period (resp. constant). As an illustration, a specific focus is given on a class of delayed Lur’e systems.}}, author = {{Chaillet, Antoine and Yu. Pogromsky, Alexander and Rüffer, Björn S.}}, booktitle = {{Proc. 52nd IEEE Conf. Decis. Control}}, pages = {{1596–1601}}, title = {{{A Razumikhin approach for the incremental stability of delayed nonlinear systems}}}, year = {{2013}}, } @article{40780, author = {{Real, Eusebio and Eguizabal, Alma and Pontón, Alejandro and Díez, Marta Calvo and Val-Bernal, José Fernando and Mayorga, Marta and Revuelta, José M. and López-Higuera, José M. and Conde, Olga M.}}, journal = {{J. Biomed. Opt.}}, number = {{12}}, pages = {{126003–126003}}, title = {{{Optical coherence tomography assessment of vessel wall degradation in thoracic aortic aneurysms}}}, doi = {{10.1117/1.JBO.18.12.126003}}, volume = {{18}}, year = {{2013}}, } @inproceedings{40778, abstract = {{Separable Lyapunov functions play vital roles, for example, in stability analysis of large-scale systems. A Lyapunov function is called max-separable if it can be decomposed into a maximum of functions with one-dimensional arguments. Similarly, it is called sum-separable if it is a sum of such functions. In this paper it is shown that for a monotone system on a compact state space, asymptotic stability implies existence of a max-separable Lyapunov function. We also construct two systems on a non-compact state space, for which a max-separable Lyapunov function does not exist. One of them has a sum-separable Lyapunov function. The other does not.}}, author = {{Rantzer, Anders and Rüffer, Björn S. and Dirr, Gunther}}, booktitle = {{Proc. 52nd IEEE Conf. Decis. Control}}, pages = {{4590–4594}}, title = {{{Separable Lyapunov functions for monotone systems}}}, year = {{2013}}, } @article{40786, author = {{Tong, Jun and Schreier, Peter J.}}, journal = {{IEEE Wireless Comm. Lett.}}, number = {{4}}, pages = {{367–370}}, title = {{{Regularized Preconditioning for Krylov Subspace Equalization of OFDM Systems over Doubly Selective Channels}}}, doi = {{10.1109/WCL.2013.042313.130096}}, volume = {{2}}, year = {{2013}}, } @inproceedings{40784, author = {{Castañeda, Mario and Stein, Manuel and Antreich, Felix and Tasdemir, Emrah and Kurz, Lothar and Noll, Tobias G. and Nossek, Josef A.}}, booktitle = {{ION GNSS+}}, title = {{{Joint space-time interference mitigation for embedded multi-antenna GNSS receivers}}}, year = {{2013}}, } @article{40787, abstract = {{Breast tumors are blindly identified using Principal (PCA) and Independent Component Analysis (ICA) of localized reflectance measurements. No assumption of a particular theoretical model for the reflectance needs to be made, while the resulting features are proven to have discriminative power of breast pathologies. Normal, benign and malignant breast tissue types in lumpectomy specimens were imaged ex vivo and a surgeon-guided calibration of the system is proposed to overcome the limitations of the blind analysis. A simple, fast and linear classifier has been proposed where no training information is required for the diagnosis. A set of 29 breast tissue specimens have been diagnosed with a sensitivity of 96% and specificity of 95% when discriminating benign from malignant pathologies. The proposed hybrid combination PCA-ICA enhanced diagnostic discrimination, providing tumor probability maps, and intermediate PCA parameters reflected tissue optical properties.}}, author = {{Eguizabal, Alma and Laughney, Ashley M. and Garcia-Allende, P. Beatriz and Krishnaswamy, Venkataramanan and Wells, Wendy A. and Paulsen, Keith D. and Pogue, Brian W. and Lopez-Higuera, Jose M. and Conde, Olga M.}}, journal = {{Biomed. Opt. Express}}, number = {{7}}, pages = {{1104–1118}}, title = {{{Direct identification of breast cancer pathologies using blind separation of label-free localized reflectance measurements}}}, doi = {{10.1364/BOE.4.001104}}, volume = {{4}}, year = {{2013}}, } @article{39542, author = {{Shayovitz, Dror and Herrmann, Harald and Sohler, Wolfgang and Ricken, Raimund and Silberhorn, Christine and Marom, Dan M.}}, issn = {{0146-9592}}, journal = {{Optics Letters}}, keywords = {{Atomic and Molecular Physics, and Optics}}, number = {{22}}, publisher = {{The Optical Society}}, title = {{{Time-to-space conversion of ultrafast waveforms at 155  μm in a planar periodically poled lithium niobate waveguide}}}, doi = {{10.1364/ol.38.004708}}, volume = {{38}}, year = {{2013}}, } @article{39551, author = {{Herrmann, Harald and Yang, Xu and Thomas, Abu and Poppe, Andreas and Sohler, Wolfgang and Silberhorn, Christine}}, issn = {{1094-4087}}, journal = {{Optics Express}}, keywords = {{Atomic and Molecular Physics, and Optics}}, number = {{23}}, publisher = {{The Optical Society}}, title = {{{Post-selection free, integrated optical source of non-degenerate, polarization entangled photon pairs}}}, doi = {{10.1364/oe.21.027981}}, volume = {{21}}, year = {{2013}}, } @article{40163, author = {{Förtsch, Michael and Fürst, Josef U. and Wittmann, Christoffer and Strekalov, Dmitry and Aiello, Andrea and Chekhova, Maria V. and Silberhorn, Christine and Leuchs, Gerd and Marquardt, Christoph}}, issn = {{2041-1723}}, journal = {{Nature Communications}}, keywords = {{General Physics and Astronomy, General Biochemistry, Genetics and Molecular Biology, General Chemistry, Multidisciplinary}}, number = {{1}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{A versatile source of single photons for quantum information processing}}}, doi = {{10.1038/ncomms2838}}, volume = {{4}}, year = {{2013}}, } @article{39033, author = {{Rohde, Peter P. and Schreiber, Andreas and Štefaňák, Martin and Jex, Igor and Gilchrist, Alexei and Silberhorn, Christine}}, issn = {{1546-1955}}, journal = {{Journal of Computational and Theoretical Nanoscience}}, keywords = {{Electrical and Electronic Engineering, Computational Mathematics, Condensed Matter Physics, General Materials Science, General Chemistry}}, number = {{7}}, pages = {{1644--1652}}, publisher = {{American Scientific Publishers}}, title = {{{Increasing the Dimensionality of Quantum Walks Using Multiple Walkers}}}, doi = {{10.1166/jctn.2013.3104}}, volume = {{10}}, year = {{2013}}, } @article{40160, author = {{Kruse, R and Katzschmann, F and Christ, A and Schreiber, A and Wilhelm, S and Laiho, K and Gábris, A and Hamilton, C S and Jex, I and Silberhorn, Christine}}, issn = {{1367-2630}}, journal = {{New Journal of Physics}}, keywords = {{General Physics and Astronomy}}, number = {{8}}, publisher = {{IOP Publishing}}, title = {{{Spatio-spectral characteristics of parametric down-conversion in waveguide arrays}}}, doi = {{10.1088/1367-2630/15/8/083046}}, volume = {{15}}, year = {{2013}}, } @inbook{34682, author = {{Alpsancar, Suzana}}, booktitle = {{Die Entwicklung der Psyche in der Geschichte der Menschheit. Auf dem Weg zu einem integrativen Ansatz}}, editor = {{Jüttemann, Gerd}}, pages = {{308--318}}, publisher = {{Pabst}}, title = {{{Technik}}}, year = {{2013}}, } @article{5045, author = {{Niemann, Rainer and Sureth-Sloane, Caren}}, issn = {{0963-8180}}, journal = {{European Accounting Review}}, number = {{2}}, pages = {{367--390}}, publisher = {{Informa UK Limited}}, title = {{{Sooner or Later? – Paradoxical Investment Effects of Capital Gains Taxation under Simultaneous Investment and Abandonment Flexibility}}}, doi = {{10.1080/09638180.2012.682781}}, volume = {{22}}, year = {{2013}}, } @article{5048, author = {{Vollert, Pia and Eikel, Carolin and Sureth-Sloane, Caren}}, journal = {{Steuer und Wirtschaft}}, number = {{4}}, pages = {{367--379}}, title = {{{Advance Pricing Agreements (APAs) als Instrument zur Vermeidung von Verrechnungspreiskonflikten – eine kritische Betrachtung}}}, volume = {{90}}, year = {{2013}}, } @inproceedings{41353, author = {{Gunkel, Marjaana and Schütz, Julia and Seifert, Andreas and Scharlau, Ingrid and Beck, Karin and Heuer, Claudia}}, booktitle = {{INTED2013 Conference Proceedings: 7th International Technology, Education and Development Conference March 4th-6th, 2013 – Valencia, Spain}}, location = {{Valencia}}, pages = {{2510--2517}}, title = {{{A New Model of Higher Education in the European Context - The Leuphana Experience.}}}, year = {{2013}}, }