@article{7297, author = {{Komijani, Y. and Csontos, M. and Shorubalko, I. and Zülicke, U. and Ihn, T. and Ensslin, K. and Reuter, Dirk and Wieck, A. D.}}, issn = {{0295-5075}}, journal = {{EPL (Europhysics Letters)}}, number = {{3}}, publisher = {{IOP Publishing}}, title = {{{Anisotropic Zeeman shift in p-type GaAs quantum point contacts}}}, doi = {{10.1209/0295-5075/102/37002}}, volume = {{102}}, year = {{2013}}, } @article{7298, author = {{Moody, G. and Singh, R. and Li, H. and Akimov, I. A. and Bayer, M. and Reuter, Dirk and Wieck, A. D. and Cundiff, S. T.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{4}}, publisher = {{American Physical Society (APS)}}, title = {{{Fifth-order nonlinear optical response of excitonic states in an InAs quantum dot ensemble measured with two-dimensional spectroscopy}}}, doi = {{10.1103/physrevb.87.045313}}, volume = {{87}}, year = {{2013}}, } @inproceedings{7299, author = {{Moody, G. and Singh, R. and Li, H. and Akimov, I. A. and Bayer, M. and Reuter, Dirk and Wieck, A. D. and Bracker, A. S. and Gammon, D. and Cundiff, S. T.}}, booktitle = {{CLEO: 2013}}, isbn = {{9781557529725}}, publisher = {{OSA}}, title = {{{Confinement Effects on Biexciton Binding in Semiconductor Quantum Dots Measured with 2D Coherent Spectroscopy}}}, doi = {{10.1364/cleo_qels.2013.qm4b.2}}, year = {{2013}}, } @inproceedings{7333, author = {{Singh, R. and Moody, G. and Li, H. and Akimov, I. A. and Bayer, M. and Reuter, Dirk and Wieck, A. D. and Cundiff, S. T.}}, booktitle = {{Conference on Lasers and Electro-Optics 2012}}, isbn = {{9781557529435}}, publisher = {{OSA}}, title = {{{Coherence of Fine-Structure States of an InAs Quantum Dot Ensemble Studied with 2D Fourier-Transform Spectroscopy}}}, doi = {{10.1364/cleo_at.2012.jw2a.2}}, year = {{2013}}, } @article{7336, author = {{Komijani, Y. and Choi, T. and Nichele, F. and Ensslin, K. and Ihn, T. and Reuter, Dirk and Wieck, A. D.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{3}}, publisher = {{American Physical Society (APS)}}, title = {{{Counting statistics of hole transfer in ap-type GaAs quantum dot with dense excitation spectrum}}}, doi = {{10.1103/physrevb.88.035417}}, volume = {{88}}, year = {{2013}}, } @inproceedings{7337, author = {{Höpfner, Henning and Fritsche, Carola and Ludwig, Arne and Ludwig, Astrid and Stromberg, Frank and Wende, Heiko and Keune, Werner and Reuter, Dirk and Wieck, Andreas D. and Gerhardt, Nils C. and Hofmann, Martin R.}}, booktitle = {{Ultrafast Phenomena and Nanophotonics XVII}}, editor = {{Betz, Markus and Elezzabi, Abdulhakem Y. and Song, Jin-Joo and Tsen, Kong-Thon}}, publisher = {{SPIE}}, title = {{{Spin relaxation in spin light-emitting diodes: effects of magnetic field and temperature}}}, doi = {{10.1117/12.2001511}}, year = {{2013}}, } @inbook{7470, author = {{Kremer, H.-Hugo}}, booktitle = {{Vielfalt an Übergängen in der beruflichen Bildung - zwölf Ansichten}}, editor = {{Fischer, A. and Frommberger, D.}}, pages = {{185--202}}, title = {{{Paradigmen in der Curriculumtheorie: Das Lernfeldkonzept im Kontext der Input-Output-Diskussion}}}, year = {{2013}}, } @inbook{8789, author = {{Reuter, Dirk and Gerth, Gerhard and Kirschner, J.}}, booktitle = {{Surface Diffusion}}, isbn = {{9781489902641}}, issn = {{0258-1221}}, title = {{{Surface Diffusion of 3d-Metals on W(110)}}}, doi = {{10.1007/978-1-4899-0262-7_43}}, year = {{2013}}, } @article{9803, abstract = {{Piezoelectric inertia motors, also known as stickslip drives or (smooth) impact drives, use the inertia of a body to drive it by a friction contact in small steps, in the majority of motors composed of a stick phase and a slip phase between the friction partners. For optimizing inertia motors, it is important to understand the friction contact correctly and to measure its properties appropriately. This contribution presents experimental set-ups for measuring the contact force, friction force and relative displacement in an actual inertia motor with a dry friction contact and numerical simulations of the motor operation. The motor uses a pre-stressed multilayer actuator with a displacement in the range of 20 $\mu$ m. It is shown that a previously postulated condition for the applicability of simple kinetic friction models is well fulfilled for the investigated motor. The friction contact in the motor is simulated using different kinetic friction models. The input for the friction models is the measured motion of the rod. The models qualitatively reproduce the measured motion but show quantitative deviations varying with frequency. These can be explained by vibrations of the driving rod that are experimentally investigated.}}, author = {{Hunstig, Matthias and Hemsel, Tobias and Sextro, Walter}}, journal = {{Journal of Intelligent Material Systems and Structures}}, keywords = {{Actuator, friction, motor, piezoelectric}}, number = {{11}}, pages = {{1380--1391}}, title = {{{Modelling the friction contact in an inertia motor}}}, doi = {{10.1177/1045389X12474354}}, volume = {{24}}, year = {{2013}}, } @misc{9863, abstract = {{The 9th International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA 2012) was successfully held on 22–25 April 2012 in Hirosaki, Japan. The general chair was Prof. M.K. Kurosawa from the Tokyo Institute of Technology, Japan. In the past, Korea, Germany, Turkey, China, and USA have hosted the annual conference, but this was the first time for the annual IWPMA conference to be held in Japan. The IWPMA 2012 was organized as a joint symposium with JTTAS Smart Actuator/Sensor Study Committee and ICAT International Actuator Symposium. More than 150 people from the world (12 countries) participated and had fruitful discussions with 138 presentations including 11 invited talks. In addition to piezoelectric materials and piezoelectric actuators, the presentation topics were expanded to include solid-state actuators, energy harvesting, multifunctional materials, and other current important issues. It is our honor to pronounce that the “Sensors and Actuators A” journal has published this special issue on the IWPMA 2012 including the best 25 contributions. This issue covers the functional materials, such as piezoelectric and magnetostrictive materials, and their applications. However, for the innovative devices, various ideas concerning materials, mechanisms, designs, fabrication process, and control-systems are also required to be organically combined. From the view of this concept, we believe the published 25 papers can excite the researcher's intellectual curiosity concerning these issues and can serve as the driving force for further breakthroughs. Please enjoy the latest research results selected by our editor team. Finally, we appreciate all participants in the IWPMA 2012 and the devoted reviewers for the publication. We hope that the papers in this special issue will open up the next researches, which will be presented in the future IWPMA conferences.}}, booktitle = {{Sensors and Actuators A: Physical}}, editor = {{Morita, Takeshi and Hemsel, Tobias and Ijima, T. and Jeong, D. Y. and Kanda, T. and Twiefel, Jens and Uzgur, E. and Lallart, M.}}, location = {{Hirosaki}}, pages = {{1--172}}, publisher = {{Elsevier}}, title = {{{Selected Papers from the 9th International Workshop on Piezoelectric Materials and Applications in Actuators}}}, doi = {{10.1016/j.sna.2013.06.017}}, volume = {{200}}, year = {{2013}}, } @article{9867, abstract = {{We report the piezoelectric properties of CuO-doped hydrothermal (K,Na)NbO3 ceramics that can be applied as hard-type lead-free piezoelectric ceramics. To date, we have succeeded in synthesizing high-quality KNbO3 and NaNbO3 powders by the hydrothermal method, which is based on an ionic reaction at high temperature (around 210 $\,^{\circ}$C) and pressure. Increasing both the piezoelectric constant d and the mechanical quality factor (Qm) is important for resonance-type piezoelectric devices, such as ultrasonic motors and transformers. CuO doping into hydrothermal (K,Na)NbO3 ceramics was examined to realize hard-type lead-free piezoelectric ceramics. By doping with 1.2 mol \% CuO, Qm was increased and the dielectric loss (tan δ) was decreased to 0.5\%. The grain size was also influenced by the amount of CuO doping, which indicates that Qm is related to the density. To achieve a higher Qm value, the grain size is required to be less than 5 µm; however, excessive CuO doping leads to anomalous grain growth. Optimal piezoelectric properties were obtained for 1.2 mol \% CuO-doped (K,Na)NbO3; k31 = 0.32, d31 = -44 pC/N, Qm (radial) = 959, and tan δ= 0.5\%. These characteristics showed that CuO doping with hydrothermal powders is effective for obtaining hard-type ceramics, and the mechanical quality factor is more than ten times higher than that of nondoped hydrothermal (K,Na)NbO3 ceramics. Therefore, compared with the conventional solid-state method, we could succeed in obtaining hard-type ceramics by a simple and short process.}}, author = {{Yokouchi, Yuriko and Maeda, Takafumi and Bornmann, Peter and Hemsel, Tobias and Morita, Takeshi}}, journal = {{Japanese Journal of Applied Physics}}, number = {{7S}}, title = {{{Piezoelectric Properties of CuO-Doped (K,Na)NbO3 Lead-Free Ceramics Synthesized with Hydrothermal Powders}}}, doi = {{10.7567/JJAP.52.07HB03}}, volume = {{52}}, year = {{2013}}, } @inproceedings{4106, author = {{Lindner, Jörg and Kemper, R.M. and As, Donald and Meeertens, D. and Kovács, A. and Luysberg, M. and Tillmann, K.}}, location = {{Regensburg}}, pages = {{188--189}}, title = {{{Characterization of cubic GaN/AlN multi-quantum wells using state-of-the-art analytical STEM}}}, year = {{2013}}, } @inproceedings{509, abstract = {{In this paper we will introduce a new d-dimensional graph for constructing geometric application layer overlay net-works. Our approach will use internet coordinates, embedded using the L∞ -metric. After describing the graph structure, we will show how it limits maintenance overhead by bounding each node’s out-degree and how it supports greedy routing using one-hop neighbourhood information in each routing step. We will further show that greedy routing can always compute a path in our graph and we will also prove that in each forwarding step the next hop is closer to the destination than the current node.}}, author = {{Autenrieth, Marcus and Frey, Hannes}}, booktitle = {{Proceedings of the Conference on Networked Systems (NetSys)}}, pages = {{126--131}}, title = {{{On Greedy Routing in Degree-bounded Graphs over d-Dimensional Internet Coordinate Embeddings}}}, doi = {{10.1109/NetSys.2013.10}}, year = {{2013}}, } @article{523, abstract = {{In a distributed system with attacks and defenses, both attackers and defenders are self-interested entities. We assume a reward-sharing scheme among interdependent defenders; each defender wishes to (locally) maximize her own total fair share to the attackers extinguished due to her involvement (and possibly due to those of others). What is the maximum amount of protection achievable by a number of such defenders against a number of attackers while the system is in a Nash equilibrium? As a measure of system protection, we adopt the Defense-Ratio (Mavronicolas et al., 2008)[20], which provides the expected (inverse) proportion of attackers caught by the defenders. In a Defense-Optimal Nash equilibrium, the Defense-Ratio matches a simple lower bound.We discover that the existence of Defense-Optimal Nash equilibria depends in a subtle way on how the number of defenders compares to two natural graph-theoretic thresholds we identify. In this vein, we obtain, through a combinatorial analysis of Nash equilibria, a collection of trade-off results:• When the number of defenders is either sufficiently small or sufficiently large, Defense-Optimal Nash equilibria may exist. The corresponding decision problem is computationally tractable for a large number of defenders; the problem becomes NPNP-complete for a small number of defenders and the intractability is inherited from a previously unconsidered combinatorial problem in Fractional Graph Theory.• Perhaps paradoxically, there is a middle range of values for the number of defenders where Defense-Optimal Nash equilibria do not exist.}}, author = {{Mavronicolas, Marios and Monien, Burkhard and Papadopoulou Lesta, Vicky}}, journal = {{Discrete Applied Mathematics}}, number = {{16-17}}, pages = {{2563--2586}}, publisher = {{Elsevier}}, title = {{{How many attackers can selfish defenders catch?}}}, doi = {{10.1016/j.dam.2013.05.022}}, volume = {{161}}, year = {{2013}}, } @inbook{6456, author = {{Higham, J. J. S. and Kremer, H.-Hugo and Yeomans, D.}}, booktitle = {{The Architecture of Innovative Apprenticeship}}, editor = {{Deitmer, L. and Hauschildt, U. and Rauner, F. and Zelloth, H.}}, pages = {{39--50}}, title = {{{Exploring Intermediate Vocational Education and Training for 16-19 Year-olds in Germany and England}}}, year = {{2013}}, } @inproceedings{15763, author = {{Fober, T. and Klebe, G. and Hüllermeier, Eyke}}, booktitle = {{In Proceedings GFKL-2011, Conference of the German Classification Society, Frankfurt Germany}}, editor = {{Lausen, B. and Van den Poel, D. and Ultsch, A.}}, pages = {{279--286}}, publisher = {{Springer}}, title = {{{Local clique merging: An extension of the maximum common subgraph measure with applications in structural bioinformatics, Algorithms from and for Nature and Life}}}, year = {{2013}}, } @inproceedings{15112, author = {{Fallah Tehrani, A. and Hüllermeier, Eyke}}, booktitle = {{in Proceedings EUSFLAT-2013 8th International Conference on the European Society for Fuzzy Logic and Technology, Milano, Italy}}, editor = {{Montero, J. and Pasi, G. and Ciucci, D.}}, publisher = {{Atlantis Press}}, title = {{{Ordinal Choquistic regression }}}, year = {{2013}}, } @article{16044, author = {{Heider, D. and Senge, Robin and Cheng, W. and Hüllermeier, Eyke}}, journal = {{Bioinformatics}}, number = {{16}}, pages = {{1946--1952}}, title = {{{Multilabel classification for exploiting cross-resistance information in HIV-1 drug resistence prediction}}}, volume = {{29}}, year = {{2013}}, } @article{16107, author = {{Bartley, Tim and Crowley, Philip J. D. and Datta, Animesh and Nunn, Joshua and Zhang, Lijian and Walmsley, Ian}}, issn = {{1050-2947}}, journal = {{Physical Review A}}, title = {{{Strategies for enhancing quantum entanglement by local photon subtraction}}}, doi = {{10.1103/physreva.87.022313}}, year = {{2013}}, } @inproceedings{16393, abstract = {{Many 3D scenes (e.g. generated from CAD data) are composed of a multitude of objects that are nested in each other. A showroom, for instance, may contain multiple cars and every car has a gearbox with many gearwheels located inside. Because the objects occlude each other, only few are visible from outside. We present a new technique, Spherical Visibility Sampling (SVS), for real-time 3D rendering of such -- possibly highly complex -- scenes. SVS exploits the occlusion and annotates hierarchically structured objects with directional visibility information in a preprocessing step. For different directions, the directional visibility encodes which objects of a scene's region are visible from the outside of the regions' enclosing bounding sphere. Since there is no need to store a separate view space subdivision as in most techniques based on preprocessed visibility, a small memory footprint is achieved. Using the directional visibility information for an interactive walkthrough, the potentially visible objects can be retrieved very efficiently without the need for further visibility tests. Our evaluation shows that using SVS allows to preprocess complex 3D scenes fast and to visualize them in real time (e.g. a Power Plant model and five animated Boeing 777 models with billions of triangles). Because SVS does not require hardware support for occlusion culling during rendering, it is even applicable for rendering large scenes on mobile devices.}}, author = {{Eikel, Benjamin and Jähn, Claudius and Fischer, Matthias and Meyer auf der Heide, Friedhelm}}, booktitle = {{Computer Graphics Forum}}, issn = {{0167-7055}}, number = {{4}}, pages = {{49--58}}, title = {{{Spherical Visibility Sampling}}}, doi = {{10.1111/cgf.12150}}, volume = {{32}}, year = {{2013}}, }