@article{46394, abstract = {{Meta-heuristics are frequently used to tackle NP-hard combinatorial optimization problems. With this paper we contribute to the understanding of the success of 2-opt based local search algorithms for solving the traveling salesperson problem (TSP). Although 2-opt is widely used in practice, it is hard to understand its success from a theoretical perspective. We take a statistical approach and examine the features of TSP instances that make the problem either hard or easy to solve. As a measure of problem difficulty for 2-opt we use the approximation ratio that it achieves on a given instance. Our investigations point out important features that make TSP instances hard or easy to be approximated by 2-opt.}}, author = {{Mersmann, O and Bischl, B and Trautmann, Heike and Wagner, M and Bossek, Jakob and Neumann, F}}, journal = {{Annals of Mathematics and Artificial Intelligence}}, pages = {{151–182}}, title = {{{A Novel Feature-Based Approach to Characterize Algorithm Performance for the Traveling Salesman Problem}}}, volume = {{69}}, year = {{2013}}, } @misc{37555, author = {{Grotjahn, Rebecca}}, booktitle = {{Lexikon der Kirchenmusik Bd. 2}}, editor = {{Massenkeil, Günther and Zywietz, Michael}}, isbn = {{978-3-89007-696-6}}, publisher = {{Laaber-Verlag}}, title = {{{Bach (Familie)}}}, volume = {{6}}, year = {{2013}}, } @misc{37561, author = {{Grotjahn, Rebecca}}, booktitle = {{Lexikon der Kirchenmusik Bd. 2}}, editor = {{Massenkeil, Günther and Zywietz, Michael}}, publisher = {{Laaber-Verlag}}, title = {{{Kantate}}}, volume = {{6}}, year = {{2013}}, } @phdthesis{37569, abstract = {{Das Marktportfolio der Hinterachsen weist zwischen den Achskonzepten Schwertlenkerachse und Verbundlenkerachse sowohl im Bereich der fahrdynamischen Auslegungsmöglichkeiten als auch unter Kosten- und Gewichtsaspekten eine Lücke auf. Dieser vom Markt zur Zeit nicht gedeckte Bereich lässt sich durch eine gezielte elastokinematische Aufwertung von Verbundlenkerachsen schließen. Zur Aufwertung und Weiterentwicklung der Verbundlenkerachse ist eine elastokinematische Spurkorrektur unter Seitenkraft und unter Bremskraft sowie eine Verbesserung des Verhältnisses zwischen Seiten- und Längssteifigkeit notwendig. Die vorliegende Promotionsschrift beschreibt und analysiert zunächst die Eigenschaften bestehender Ansätze zur elastokinematischen Optimierung von Verbundlenkerachsen. Basierend auf den Erkenntnissen dieser Untersuchungen wird eine Verbundlenkerachse mit entkoppeltem Radträger entwickelt, welche sowohl unter wirtschaftlichen als auch unter performanten Gesichtspunkten zwischen einer regulären Verbundlenkerachse und einer Schwertlenkerachse platziert werden kann. Die Entwicklung erfolgt vom Konzeptentwurf bis zum auskonstruierten Bauteil auf Basis numerischer Simulation. Die entwickelte Konstruktion wird in einen Prototypen überführt, welcher in einen Ford Focus implementiert wird. In Fahr- und Komponentenversuchen wird das Verhalten des neuen Achskonzepts untersucht und mit konkurrierenden Achskonzepten verglichen.}}, author = {{Schultz, Erik}}, isbn = {{978-3-8440-2290-2}}, keywords = {{Verbundlenkerachse, Fahrwerk, Hinterachse, Elastokinematik, entkoppelter Radträger}}, pages = {{232}}, publisher = {{Shaker Verlag}}, title = {{{Analyse und Synthese elastokinematisch optimierter Verbundlenkerachsen - Entwicklung einer Verbundlenkerachse mit entkoppeltem Radträger}}}, volume = {{2013,3}}, year = {{2013}}, } @misc{37557, author = {{Grotjahn, Rebecca}}, booktitle = {{Lexikon der Kirchenmusik Bd. 2}}, editor = {{Massenkeil, Günther and Zywietz, Michael}}, isbn = {{978-3-89007-696-6}}, publisher = {{Laaber-Verlag}}, title = {{{Frauen in der Kirchenmusik}}}, volume = {{6}}, year = {{2013}}, } @article{22584, author = {{Dang, Van-Son and Parala, Harish and Kim, Jin Hyun and Xu, Ke and Srinivasan, Nagendra B. and Edengeiser, Eugen and Havenith, Martina and Wieck, Andreas D. and de los Arcos de Pedro, Maria Teresa and Fischer, Roland. A. and Devi, Anjana}}, issn = {{1862-6300}}, journal = {{physica status solidi (a)}}, pages = {{416--424}}, title = {{{Electrical and optical properties of TiO2thin films prepared by plasma-enhanced atomic layer deposition}}}, doi = {{10.1002/pssa.201330115}}, year = {{2013}}, } @article{22589, author = {{Srinivasan, Nagendra B. and Thiede, Tobias B. and de los Arcos de Pedro, Maria Teresa and Rogalla, Detlef and Becker, Hans-Werner and Devi, Anjana and Fischer, Roland A.}}, issn = {{1862-6300}}, journal = {{physica status solidi (a)}}, pages = {{260--266}}, title = {{{MOCVD of tungsten nitride thin films: Comparison of precursor performance and film characteristics}}}, doi = {{10.1002/pssa.201330127}}, year = {{2013}}, } @article{22596, author = {{Xu, Ke and Chaudhuri, Ayan Roy and Parala, Harish and Schwendt, Dominik and de los Arcos de Pedro, Maria Teresa and Osten, H. Jörg and Devi, Anjana}}, issn = {{2050-7526}}, journal = {{Journal of Materials Chemistry C}}, title = {{{Atomic layer deposition of Er2O3 thin films from Er tris-guanidinate and water: process optimization, film analysis and electrical properties}}}, doi = {{10.1039/c3tc30401a}}, year = {{2013}}, } @article{22593, author = {{Srinivasan, N.B. and Thiede, T.B. and de los Arcos de Pedro, Maria Teresa and Gwildies, V. and Krasnopolski, M. and Becker, H.-W. and Rogalla, D. and Devi, A. and Fischer, R.A.}}, issn = {{0257-8972}}, journal = {{Surface and Coatings Technology}}, pages = {{130--136}}, title = {{{Transition metal nitride thin films grown by MOCVD using amidinato based complexes [M(NtBu)2{(iPrN)2CMe}2] (M=Mo, W) as precursors}}}, doi = {{10.1016/j.surfcoat.2013.06.024}}, year = {{2013}}, } @article{22594, author = {{Will, Andreas and de los Arcos de Pedro, Maria Teresa and Corbella, Carles and Hecimovic, Ante and Machura, Patrick D and Winter, Jörg and von Keudell, Achim}}, issn = {{0022-3727}}, journal = {{Journal of Physics D: Applied Physics}}, title = {{{Target implantation and redeposition processes during high-power impulse magnetron sputtering of aluminum}}}, doi = {{10.1088/0022-3727/46/8/084009}}, year = {{2013}}, } @article{22591, author = {{Corbella, Carles and Grosse-Kreul, Simon and Kreiter, Oliver and de los Arcos de Pedro, Maria Teresa and Benedikt, Jan and von Keudell, Achim}}, issn = {{0034-6748}}, journal = {{Review of Scientific Instruments}}, title = {{{Particle beam experiments for the analysis of reactive sputtering processes in metals and polymer surfaces}}}, doi = {{10.1063/1.4826066}}, year = {{2013}}, } @article{22595, author = {{Winter, J and Hecimovic, A and de los Arcos de Pedro, Maria Teresa and Böke, M and Schulz-von der Gathen, V}}, issn = {{0022-3727}}, journal = {{Journal of Physics D: Applied Physics}}, title = {{{Instabilities in high-power impulse magnetron plasmas: from stochasticity to periodicity}}}, doi = {{10.1088/0022-3727/46/8/084007}}, year = {{2013}}, } @article{22592, author = {{Rügner, Katja and Reuter, Rüdiger and Ellerweg, Dirk and de los Arcos de Pedro, Maria Teresa and von Keudell, Achim and Benedikt, Jan}}, issn = {{1612-8850}}, journal = {{Plasma Processes and Polymers}}, pages = {{1061--1073}}, title = {{{Insight into the Reaction Scheme of SiO2 Film Deposition at Atmospheric Pressure}}}, doi = {{10.1002/ppap.201300059}}, year = {{2013}}, } @article{39717, author = {{Lorenz, Alexander and Zimmermann, Natalie and Kumar, Satyendra and Evans, Dean R. and Cook, Gary and Martínez, Manuel Fernández and Kitzerow, Heinz-Siegfried}}, issn = {{1559-128X}}, journal = {{Applied Optics}}, keywords = {{Atomic and Molecular Physics, and Optics, Engineering (miscellaneous), Electrical and Electronic Engineering}}, number = {{22}}, publisher = {{The Optical Society}}, title = {{{X-ray scattering of nematic liquid crystal nanodispersion with negative dielectric anisotropy [Invited]}}}, doi = {{10.1364/ao.52.0000e1}}, volume = {{52}}, year = {{2013}}, } @article{39715, author = {{Nordendorf, Gaby and Lorenz, Alexander and Hoischen, Andreas and Schmidtke, Jürgen and Kitzerow, Heinz-Siegfried and Wilkes, David and Wittek, Michael}}, issn = {{0021-8979}}, journal = {{Journal of Applied Physics}}, keywords = {{General Physics and Astronomy}}, number = {{17}}, publisher = {{AIP Publishing}}, title = {{{Hysteresis and memory factor of the Kerr effect in blue phases}}}, doi = {{10.1063/1.4828477}}, volume = {{114}}, year = {{2013}}, } @inproceedings{39712, author = {{Schmidtke, Juergen and Lu, Lu and Kitzerow, Heinz-Siegfried and Terentjev, Eugene M.}}, booktitle = {{SPIE Proceedings}}, editor = {{Chien, Liang-Chy and Broer, Dick J. and Chigrinov, Vladimir and Yoon, Tae-Hoon}}, issn = {{0277-786X}}, publisher = {{SPIE}}, title = {{{Liquid crystal lasers: recent advances}}}, doi = {{10.1117/12.2008373}}, year = {{2013}}, } @article{39720, abstract = {{ We examine for the first time how chemically and thermally stable gold nanoparticles (NPs), prepared by a silane conjugation approach, affect both the thermal and the electro-optical properties of a nematic liquid crystal (LC), when doped at concentrations ranging from 0.25 to 7.5 wt%. We find that the octadecylsilane-conjugated gold NPs stabilize both the enantiotropic nematic and the monotropic smectic-A phases of the LC host with a maximum stabilization of 2 ° C for the nematic and 3.5 ° C for the smectic-A phases for the mixture containing 1 wt% of the silanized particles. The same mixture shows the lowest values for the Fréedericksz transition threshold voltage and the highest value for the dielectric anisotropy. Generally, all NP-containing mixtures, except mixtures with NP concentrations exceeding 5 wt%, reduce the threshold voltage, increase the dielectric anisotropy and reduce both rise and decay time; the latter particularly at temperatures at least 10 ° C below the isotropic–nematic phase transition on cooling. }}, author = {{Mirzaei, Javad and Urbanski, Martin and Kitzerow, Heinz-Siegfried and Hegmann, Torsten}}, issn = {{1364-503X}}, journal = {{Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences}}, keywords = {{General Physics and Astronomy, General Engineering, General Mathematics}}, number = {{1988}}, publisher = {{The Royal Society}}, title = {{{Hydrophobic gold nanoparticles via silane conjugation: chemically and thermally robust nanoparticles as dopants for nematic liquid crystals}}}, doi = {{10.1098/rsta.2012.0256}}, volume = {{371}}, year = {{2013}}, } @article{39719, author = {{Vollbrecht, Joachim and Kasdorf, Olga and Quiring, Viktor and Suche, Hubertus and Bock, Harald and Kitzerow, Heinz-Siegfried}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, keywords = {{Physics and Astronomy (miscellaneous)}}, number = {{4}}, publisher = {{AIP Publishing}}, title = {{{Microresonator-enhanced electroluminescence of an organic light emitting diode based on a columnar liquid crystal}}}, doi = {{10.1063/1.4816425}}, volume = {{103}}, year = {{2013}}, } @article{37672, abstract = {{AbstractLet ${F}_{BC} (\lambda , k; t)$ be the Heckman–Opdam hypergeometric function of type BC with multiplicities $k= ({k}_{1} , {k}_{2} , {k}_{3} )$ and weighted half-sum $\rho (k)$ of positive roots. We prove that ${F}_{BC} (\lambda + \rho (k), k; t)$ converges as ${k}_{1} + {k}_{2} \rightarrow \infty $ and ${k}_{1} / {k}_{2} \rightarrow \infty $ to a function of type A for $t\in { \mathbb{R} }^{n} $ and $\lambda \in { \mathbb{C} }^{n} $. This limit is obtained from a corresponding result for Jacobi polynomials of type BC, which is proven for a slightly more general limit behavior of the multiplicities, using an explicit representation of Jacobi polynomials in terms of Jack polynomials. Our limits include limit transitions for the spherical functions of non-compact Grassmann manifolds over one of the fields $ \mathbb{F} = \mathbb{R} , \mathbb{C} , \mathbb{H} $ when the rank is fixed and the dimension tends to infinity. The limit functions turn out to be exactly the spherical functions of the corresponding infinite-dimensional Grassmann manifold in the sense of Olshanski.}}, author = {{Rösler, Margit and Koornwinder, Tom and Voit, Michael}}, issn = {{0010-437X}}, journal = {{Compositio Mathematica}}, keywords = {{Algebra and Number Theory}}, number = {{8}}, pages = {{1381--1400}}, publisher = {{Wiley}}, title = {{{Limit transition between hypergeometric functions of type BC and type A}}}, doi = {{10.1112/s0010437x13007045}}, volume = {{149}}, year = {{2013}}, } @inproceedings{24351, abstract = {{We demonstrate the first 80 Gb/s decision feedback equalizer in various electrical and optical applications. The device, designed in SiGe:C BiCMOS 0.13 μm technology, enables error-free data recovery of heavily distorted signals transmitted at a bandwidth less than 30% of their bit rate. The fastest nonlinear electrical equalizer reported yet utilizes a novel 1-tap look-ahead architecture.}}, author = {{Möller, Lothar and Awny, Ahmed and Junio, Josef and Scheytt, Christoph and Thiede, Andreas}}, booktitle = {{Optical Fiber Communication Conference}}, title = {{{80 Gb/s Decision Feedback Equalizer for Intersymbol Interference}}}, doi = {{10.1364/OFC.2013.OW4B.2 }}, year = {{2013}}, }