@article{40810,
  abstract     = {{This paper considers large multiple-input multiple-output (MIMO) communication systems with linear precoding and linear minimum mean-squared error (LMMSE) equalization based on the iterative conjugate gradient (CG) algorithm. Convergence of the CG algorithm is fast when the eigenvalues of the received signal’s covariance matrix are clustered, suggesting that mean-squared error and receiver complexity can be managed with judicious precoder design. In order to accelerate convergence of an iterative CG receiver, we incorporate constraints on two measures of eigenvalue clustering into the precoder design. Closed-form solutions to the optimal precoders are derived using majorization theory and convex optimization techniques. We show that if there are constraints on receiver complexity, the proposed precoders can improve performance for large MIMO systems operating over slowly time-varying fading channels.}},
  author       = {{Tong, Jun and Schreier, Peter J. and Weller, Steven R.}},
  journal      = {{IEEE Trans.\ Wireless Comm.}},
  number       = {{8}},
  pages        = {{2828–2837}},
  title        = {{{Linear precoding for MIMO systems with low-complexity receivers}}},
  doi          = {{10.1109/TWC.2012.070912.110877}},
  volume       = {{11}},
  year         = {{2012}},
}

@inproceedings{40807,
  abstract     = {{The Strong Uncorrelating Transform (SUT) allows blind separation of a mixture of complex independent sources if and only if all sources have distinct circularity coefficients. In practice, the circularity coefficients need to be estimated from observed data. We propose a generalized likelihood ratio test (GLRT) for separability of a complex mixture using the SUT, based on estimated circularity coefficients. For distinct circularity coefficients (separable case), the maximum likelihood (ML) estimates, required for the GLRT, are straightforward. However, for circularity coefficients with multiplicity larger than one (non-separable case), the ML estimates are much more difficult to find. Numerical simulations show the good performance of the proposed detector.}},
  author       = {{Ramírez, D. and Schreier, P. J. and Vía, J. and Santamaría, I.}},
  booktitle    = {{Proc.\ IEEE Int.\ Work. Machine Learning for Signal Process.}},
  title        = {{{GLRT For Testing Separability Of A Complex-Valued Mixture Based On The Strong Uncorrelating Transform}}},
  doi          = {{10.1109/MLSP.2012.6349785}},
  year         = {{2012}},
}

@inproceedings{40804,
  abstract     = {{This paper advocates that the convergent systems property and incremental stability are two intimately related though different properties. Sufficient conditions for the convergent systems property usually rely upon first showing that a system is incrementally stable, as e.g. in the celebrated Demidovich condition. However, in the current paper it is shown that incremental stability itself does not imply the convergence property, or vice versa. Moreover, characterizations of both properties in terms of Lyapunov functions are given. Based on these characterizations, it is established that the convergence property implies incremental stability for systems evolving oncompact sets, and also when a suitable uniformity condition is satisfied.}},
  author       = {{Rüffer, Björn S. and van de Wouw, Nathan and Mueller, Markus}},
  booktitle    = {{Proc. 51st IEEE Conf. Decis. Control}},
  pages        = {{2958–2963}},
  title        = {{{From convergent dynamics to incremental stability}}},
  year         = {{2012}},
}

@inproceedings{40808,
  abstract     = {{The monogenic signal allows us to decompose a two-dimensional real signal into a local amplitude, a local orientation, and a local phase. In this paper, we introduce the random monogenic signal and study its second-order statistical properties. The monogenic signal may be represented as a quaternion-valued signal. We show that for homogeneous random fields, we need exactly two quaternion-valued covariance functions for a complete second-order description. We also introduce a stochastic model for unidirectional signals and a measure of unidirectionality.}},
  author       = {{Olhede, S. C. and Ramírez, D. and Schreier, P. J.}},
  booktitle    = {{Proc.\ IEEE Int.\ Conf.\ Image Process.}},
  title        = {{{The Random Monogenic Signal}}},
  doi          = {{10.1109/ICIP.2012.6467404}},
  year         = {{2012}},
}

@article{40805,
  abstract     = {{We study the instantaneous frequency (IF) of continuous-time, complex-valued, zero-mean, proper, mean-square differentiable, nonstationary Gaussian stochastic processes. We compute the probability density function for the IF for fixed time, which generalizes a result known for wide-sense stationary processes to nonstationary processes. For a fixed point in time, the IF has either zero or infinite variance. For harmonizable processes, we obtain as a consequence the result that the mean of the IF, for fixed time, is the normalized first-order frequency moment of the Wigner spectrum.}},
  author       = {{Wahlberg, Patrik and Schreier, Peter J.}},
  journal      = {{Probab.\ Math.\ Statist.}},
  pages        = {{69–92}},
  title        = {{{On the instantaneous frequency of Gaussian stochastic processes}}},
  volume       = {{32}},
  year         = {{2012}},
}

@article{40173,
  abstract     = {{<jats:title>Here, There, Everywhere</jats:title>
          <jats:p>
            Random walks are a powerful mathematical method that can be used to simulate certain processes in biology, chemistry, or even the stock market. They present a statistical method for mapping the possible routes that processes can take. Quantum walks are expected to be able to probe multiple paths simultaneously. Quantum walks have been demonstrated for one-dimensional, or straight-line, walks. Now,
            <jats:bold>
              Schreiber
              <jats:italic>et al.</jats:italic>
            </jats:bold>
            (p.
            <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="55" related-article-type="in-this-issue" vol="336" xlink:href="10.1126/science.1218448">55</jats:related-article>
            , published online 8 March) demonstrate an optical system that can simulate quantum walks over a two-dimensional system, thereby providing the capability of describing much more complex processes.
          </jats:p>}},
  author       = {{Schreiber, Andreas and Gábris, Aurél and Rohde, Peter P. and Laiho, Kaisa and Štefaňák, Martin and Potoček, Václav and Hamilton, Craig and Jex, Igor and Silberhorn, Christine}},
  issn         = {{0036-8075}},
  journal      = {{Science}},
  keywords     = {{Multidisciplinary}},
  number       = {{6077}},
  pages        = {{55--58}},
  publisher    = {{American Association for the Advancement of Science (AAAS)}},
  title        = {{{A 2D Quantum Walk Simulation of Two-Particle Dynamics}}},
  doi          = {{10.1126/science.1218448}},
  volume       = {{336}},
  year         = {{2012}},
}

@article{40175,
  author       = {{Christ, Andreas and Silberhorn, Christine}},
  issn         = {{1050-2947}},
  journal      = {{Physical Review A}},
  keywords     = {{Atomic and Molecular Physics, and Optics}},
  number       = {{2}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Limits on the deterministic creation of pure single-photon states using parametric down-conversion}}},
  doi          = {{10.1103/physreva.85.023829}},
  volume       = {{85}},
  year         = {{2012}},
}

@article{40264,
  author       = {{Haller, Melanie}},
  journal      = {{In: SDHS 2012 Proceedings, https://sdhs.org/proceedings-2012#sessiondetails (Digitale Tagungspublikation)}},
  title        = {{{Buenos Aires is everywhere – subjectivities and territories in Tango Argentino}}},
  year         = {{2012}},
}

@article{41236,
  author       = {{Jensen, Christopher and Buck, Doris and Dilger, Herbert and Bauer, Matthias and Phillipp, Fritz and Roduner, Emil}},
  issn         = {{1359-7345}},
  journal      = {{Chem. Commun.}},
  keywords     = {{Materials Chemistry, Metals and Alloys, Surfaces, Coatings and Films, General Chemistry, Ceramics and Composites, Electronic, Optical and Magnetic Materials, Catalysis}},
  number       = {{6}},
  pages        = {{588--590}},
  publisher    = {{Royal Society of Chemistry (RSC)}},
  title        = {{{Maximum hydrogen chemisorption on KL zeolite supported Pt clusters}}},
  doi          = {{10.1039/c2cc37933c}},
  volume       = {{49}},
  year         = {{2012}},
}

@article{41253,
  author       = {{Conrad, Franziska and Bauer, Matthias and Sheptyakov, Denis and Weyeneth, Stephen and Jaeger, Dominik and Hametner, Kathrin and Car, Pierre-Emmanuel and Patscheider, Jörg and Günther, Detlef and Patzke, Greta R.}},
  issn         = {{2046-2069}},
  journal      = {{RSC Advances}},
  keywords     = {{General Chemical Engineering, General Chemistry}},
  number       = {{7}},
  publisher    = {{Royal Society of Chemistry (RSC)}},
  title        = {{{New spinel oxide catalysts for visible-light-driven water oxidation}}},
  doi          = {{10.1039/c2ra20169k}},
  volume       = {{2}},
  year         = {{2012}},
}

@article{41247,
  author       = {{Rabeah, Jabor and Bauer, Matthias and Baumann, Wolfgang and McConnell, Ann E. C. and Gabrielli, William F. and Webb, Paul B. and Selent, Detlef and Brückner, Angelika}},
  issn         = {{2155-5435}},
  journal      = {{ACS Catalysis}},
  keywords     = {{Catalysis, General Chemistry}},
  number       = {{1}},
  pages        = {{95--102}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Formation, Operation and Deactivation of Cr Catalysts in Ethylene Tetramerization Directly Assessed by Operando EPR and XAS}}},
  doi          = {{10.1021/cs300686m}},
  volume       = {{3}},
  year         = {{2012}},
}

@article{41255,
  author       = {{Jennerjahn, Reiko and Jackstell, Ralf and Piras, Irene and Franke, Robert and Jiao, Haijun and Bauer, Matthias and Beller, Matthias}},
  issn         = {{1864-5631}},
  journal      = {{ChemSusChem}},
  keywords     = {{General Energy, General Materials Science, General Chemical Engineering, Environmental Chemistry}},
  number       = {{4}},
  pages        = {{734--739}},
  publisher    = {{Wiley}},
  title        = {{{Benign Catalysis with Iron: Unique Selectivity in Catalytic Isomerization Reactions of Olefins}}},
  doi          = {{10.1002/cssc.201100404}},
  volume       = {{5}},
  year         = {{2012}},
}

@article{41251,
  author       = {{Atkins, Andrew J. and Jacob, Christoph R. and Bauer, Matthias}},
  issn         = {{0947-6539}},
  journal      = {{Chemistry - A European Journal}},
  keywords     = {{General Chemistry, Catalysis, Organic Chemistry}},
  number       = {{23}},
  pages        = {{7021--7025}},
  publisher    = {{Wiley}},
  title        = {{{Probing the Electronic Structure of Substituted Ferrocenes with High-Resolution XANES Spectroscopy}}},
  doi          = {{10.1002/chem.201200649}},
  volume       = {{18}},
  year         = {{2012}},
}

@article{41254,
  author       = {{Welther, Alice and Bauer, Matthias and Mayer, Matthias and Jacobi von Wangelin, Axel}},
  issn         = {{1867-3880}},
  journal      = {{ChemCatChem}},
  keywords     = {{Inorganic Chemistry, Organic Chemistry, Physical and Theoretical Chemistry, Catalysis}},
  number       = {{8}},
  pages        = {{1088--1093}},
  publisher    = {{Wiley}},
  title        = {{{Iron(0) Particles: Catalytic Hydrogenations and Spectroscopic Studies}}},
  doi          = {{10.1002/cctc.201100400}},
  volume       = {{4}},
  year         = {{2012}},
}

@inbook{41362,
  author       = {{Seifert, Andreas and Schaper, Niclas}},
  booktitle    = {{Lehramtsstudierende erwerben pädagogisches Professionswissen. Ergebnisse der Längsschnittstudie LEK zur Wirksamkeit der erziehungswissenschaftlichen Lehrerausbildung.}},
  editor       = {{König, Johannes and Seifert, Andreas}},
  publisher    = {{Waxmann}},
  title        = {{{Die Entwicklung von bildungswissenschaftlichem Wissen: Theoretischer Rahmen, Testinstrument, Skalierung und Ergebnisse.}}},
  year         = {{2012}},
}

@inbook{41358,
  author       = {{Tachtsoglou, Sarantis and König, Johannes and Seifert, Andreas}},
  booktitle    = {{Lehramtsstudierende erwerben pädagogisches Professionswissen. Ergebnisse der Längsschnittstudie LEK zur Wirksamkeit der erziehungswissenschaftlichen Lehrerausbildung.}},
  editor       = {{König, Johannes and Seifert, Andreas}},
  publisher    = {{Waxmann}},
  title        = {{{Individuelle Voraussetzungen, Lerngelegenheiten und der Erwerb von pädagogischem Professionswissen.}}},
  year         = {{2012}},
}

@inbook{41360,
  author       = {{Seifert, Andreas and König, Johannes}},
  booktitle    = {{Lehramtsstudierende erwerben pädagogisches Professionswissen.. Ergebnisse der Längsschnittstudie LEK zur Wirksamkeit der erziehungswissenschaftlichen Lehrerausbildung.}},
  editor       = {{König, Johannes and Seifert, Andreas}},
  publisher    = {{Waxmann}},
  title        = {{{Pädagogisches Unterrichtswissen – bildungswissenschaftliches Wissen: Validierung zweier Konstrukte.}}},
  year         = {{2012}},
}

@inbook{41359,
  author       = {{Schreiber, Melanie and Darge, Kerstin and König, Johannes and Seifert, Andreas}},
  booktitle    = {{Lehramtsstudierende erwerben pädagogisches Professionswissen. Ergebnisse der Längsschnittstudie LEK zur Wirksamkeit der erziehungswissenschaftlichen Lehrerausbildung.}},
  editor       = {{König, Johannes and Seifert, Andreas}},
  publisher    = {{Waxmann}},
  title        = {{{Individuelle Voraussetzungen von zukünftigen Lehrkräften.}}},
  year         = {{2012}},
}

@inbook{41361,
  author       = {{Seifert, Andreas and König, Johannes}},
  booktitle    = {{Lehramtsstudierende erwerben pädagogisches Professionswissen. Ergebnisse der Längsschnittstudie LEK zur Wirksamkeit der erziehungswissenschaftlichen Lehrerausbildung.}},
  editor       = {{König, JOhannes and Seifert, Andreas}},
  publisher    = {{Waxmann}},
  title        = {{{Anlage und Durchführung der LEK-Studie.}}},
  year         = {{2012}},
}

@book{34534,
  abstract     = {{Computer gelten als prägende Faktoren unserer Gesellschaft, ohne dass die ihnen zugesprochene Gestaltungsmacht systematisch hinterfragt würde. Gemeinhin werden sie als Rechenmaschine, Medium oder Notationssystem adressiert. Unklar bleibt, welcher Status Computern als Ding überhaupt zukommt. Mit ihrer kritischen Neulektüre von Vilém Flusser und Mark Weiser legt Suzana Alpsancar zwei symptomatische Computerkonzepte im Diskurs des Digitalen frei. Sie zeigt, dass eine Reflexion der Gestaltungsmacht von Computern neben typischen Gebrauchsweisen gerade auch auf ihre potenzielle Widerständigkeit als Dinge abheben muss, um ihre Medialität angemessen erfassen zu können.}},
  author       = {{Alpsancar, Suzana}},
  isbn         = {{9783837619515}},
  issn         = {{2702-900X}},
  pages        = {{322}},
  publisher    = {{transcript Verlag}},
  title        = {{{Das Ding namens Computer. Eine kritische Neulektüre von Vilém Flusser und Mark Weiser}}},
  doi          = {{10.14361/transcript.9783839419519}},
  year         = {{2012}},
}