@inproceedings{22863, author = {{Lipsmeier, Andre and Anacker, Harald and Dumitrescu, Roman and Kühn, Arno}}, booktitle = {{Stuttgarter Symposium für Produktentwicklung SSP 2017, Stuttgart, 28. - 29. Jun. 2017}}, title = {{{Kundenorientierte Entwicklung von Intelligenten Technischen Systemen im Maschinenbau}}}, year = {{2017}}, } @inproceedings{8225, author = {{Mendes, Jorge and Cunha, Jácome and Duarte, Francisco and Engels, Gregor and Saraiva, Joao and Sauer, Stefan}}, booktitle = {{Proceedings of the 39th International Conference on Software Engineering, {ICSE} 2017, Buenos Aires, Argentina, May 20-28, 2017 - Companion Volume}}, pages = {{123--127}}, publisher = {{IEEE}}, title = {{{Systematic spreadsheet construction processes}}}, doi = {{http://dx.doi.org/10.1109/VLHCC.2017.8103459}}, year = {{2017}}, } @inproceedings{5739, author = {{Yigitbas, Enes and Stahl, Hagen and Sauer, Stefan and Engels, Gregor}}, booktitle = {{Modelling Foundations and Applications - 13th European Conference, {ECMFA} 2017, Held as Part of {STAF} 2017, Marburg, Germany, July 19-20, 2017, Proceedings}}, pages = {{126--141}}, title = {{{Self-adaptive UIs: Integrated Model-Driven Development of UIs and Their Adaptations}}}, doi = {{10.1007/978-3-319-61482-3\_8}}, year = {{2017}}, } @inproceedings{5740, author = {{Yigitbas, Enes and Sauer, Stefan and Engels, Gregor}}, booktitle = {{Proceedings of the {ACM} {SIGCHI} Symposium on Engineering Interactive Computing Systems, {EICS} 2017, Lisbon, Portugal, June 26-29, 2017}}, pages = {{99--104}}, title = {{{Adapt-UI: an IDE supporting model-driven development of self-adaptive UIs}}}, doi = {{10.1145/3102113.3102144}}, year = {{2017}}, } @inproceedings{59, abstract = {{We consider a scheduling problem on $m$ identical processors sharing an arbitrarily divisible resource. In addition to assigning jobs to processors, the scheduler must distribute the resource among the processors (e.g., for three processors in shares of 20\%, 15\%, and 65\%) and adjust this distribution over time. Each job $j$ comes with a size $p_j \in \mathbb{R}$ and a resource requirement $r_j > 0$. Jobs do not benefit when receiving a share larger than $r_j$ of the resource. But providing them with a fraction of the resource requirement causes a linear decrease in the processing efficiency. We seek a (non-preemptive) job and resource assignment minimizing the makespan.Our main result is an efficient approximation algorithm which achieves an approximation ratio of $2 + 1/(m-2)$. It can be improved to an (asymptotic) ratio of $1 + 1/(m-1)$ if all jobs have unit size. Our algorithms also imply new results for a well-known bin packing problem with splittable items and a restricted number of allowed item parts per bin.Based upon the above solution, we also derive an approximation algorithm with similar guarantees for a setting in which we introduce so-called tasks each containing several jobs and where we are interested in the average completion time of tasks (a task is completed when all its jobs are completed).}}, author = {{Kling, Peter and Mäcker, Alexander and Riechers, Sören and Skopalik, Alexander}}, booktitle = {{Proceedings of the 29th ACM Symposium on Parallelism in Algorithms and Architectures (SPAA)}}, pages = {{123----132}}, title = {{{Sharing is Caring: Multiprocessor Scheduling with a Sharable Resource}}}, doi = {{10.1145/3087556.3087578}}, year = {{2017}}, } @article{4812, author = {{Czerniuk, T. and Ehrlich, T. and Wecker, T. and As, Donat Josef and Yakovlev, D. R. and Akimov, A. V. and Bayer, M.}}, issn = {{2331-7019}}, journal = {{Physical Review Applied}}, number = {{1}}, publisher = {{American Physical Society (APS)}}, title = {{{Picosecond Acoustics in Single Quantum Wells of Cubic GaN/(Al,Ga)N}}}, doi = {{10.1103/physrevapplied.7.014006}}, volume = {{7}}, year = {{2017}}, } @article{7020, author = {{Ritzmann, Julian and Schott, Rüdiger and Gross, Katherine and Reuter, Dirk and Ludwig, Arne and Wieck, Andreas D.}}, issn = {{0022-0248}}, journal = {{Journal of Crystal Growth}}, pages = {{7--10}}, publisher = {{Elsevier BV}}, title = {{{Overcoming Ehrlich-Schwöbel barrier in (1 1 1)A GaAs molecular beam epitaxy}}}, doi = {{10.1016/j.jcrysgro.2017.10.029}}, volume = {{481}}, year = {{2017}}, } @article{7027, author = {{Scholz, Sven and Schott, Rüdiger and Labud, Patrick A. and Somsen, Christoph and Reuter, Dirk and Ludwig, Arne and Wieck, Andreas D.}}, issn = {{0022-0248}}, journal = {{Journal of Crystal Growth}}, pages = {{46--50}}, publisher = {{Elsevier BV}}, title = {{{Focused ion beam supported growth of monocrystalline wurtzite InAs nanowires grown by molecular beam epitaxy}}}, doi = {{10.1016/j.jcrysgro.2017.04.013}}, volume = {{470}}, year = {{2017}}, } @article{7028, author = {{Kuznetsova, M. S. and Cherbunin, R. V. and Gerlovin, I. Ya. and Ignatiev, I. V. and Verbin, S. Yu. and Yakovlev, D. R. and Reuter, Dirk and Wieck, A. D. and Bayer, M.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{15}}, publisher = {{American Physical Society (APS)}}, title = {{{Spin dynamics of quadrupole nuclei in InGaAs quantum dots}}}, doi = {{10.1103/physrevb.95.155312}}, volume = {{95}}, year = {{2017}}, } @article{7029, author = {{Srinivasan, A. and Miserev, D. S. and Hudson, K. L. and Klochan, O. and Muraki, K. and Hirayama, Y. and Reuter, Dirk and Wieck, A. D. and Sushkov, O. P. and Hamilton, A. R.}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, number = {{14}}, publisher = {{American Physical Society (APS)}}, title = {{{Detection and Control of Spin-Orbit Interactions in a GaAs Hole Quantum Point Contact}}}, doi = {{10.1103/physrevlett.118.146801}}, volume = {{118}}, year = {{2017}}, } @inproceedings{84, abstract = {{The increasing popularity of paradigms like service-oriented computing and cloud com-puting is leading to a growing amount of service providers offering software componentsin the form of deployed, ready-to-use services (Software as a Service, SaaS) [14, 20].In order to discover and select software services, intermediaries apply service matchingapproaches for determining whether the specification of a provided service satisfies therequester’s requirements. There are already lots of different service matching approachesconsidering different service properties (structural, behavioral, and non-functional proper-ties). However, each of these approaches alone is not enough to provide a high matchingresult quality (e.g., accurate matching results) [BOR04].Thus, such approaches should be combined into a more holistic approach leading to moreaccurate matching results. However, this combination is a manual, error-prone procedurewhere many design decisions are made. Furthermore, this procedure has to be repeatedfrequently depending on the context, e.g., to consider different requesters or markets.}}, author = {{Platenius, Marie Christin and Arifulina, Svetlana and Schäfer, Wilhelm}}, booktitle = {{Tagungsband Software Engineering}}, pages = {{81----82}}, title = {{{MatchBox: A Framework for Dynamic Configuration of Service Matching Processes (Extended Abstract)}}}, year = {{2017}}, } @inproceedings{55, abstract = {{We introduce the mobile server problem, inspired by current trends to move computational tasks from cloud structures to multiple devices close to the end user. An example for this are embedded systems in autonomous cars that communicate in order to coordinate their actions. Our model is a variant of the classical Page Migration Problem. Moreformally, we consider a mobile server holding a data page.The server can move in the Euclidean space (of arbitrary dimension). In every round, requests for data items from the page pop up at arbitrary points in the space. The requests are served, each at a cost of the distance from the requesting point and the server, and the mobile server may move, at a cost D times the distance traveled for some constant D . We assume a maximum distance m the server is allowed to move per round. We show that no online algorithm can achieve a competitive ratio independent of the length of the input sequence in this setting. Hence we augment the maximum movement distance of the online algorithms to ( 1 + δ) times the maximum distance of the offline solution. We provide a deterministic algorithm which is simple to describe and works for multiple variants of our problem. The algorithm achieves almost tight competitive ratios independent of the length of the input sequence.}}, author = {{Feldkord, Björn and Meyer auf der Heide, Friedhelm}}, booktitle = {{Proceedings of the 29th ACM Symposium on Parallelism in Algorithms and Architectures (SPAA)}}, pages = {{313--319}}, title = {{{The Mobile Server Problem}}}, doi = {{10.1145/3087556.3087575}}, year = {{2017}}, } @article{6541, abstract = {{We report on the coherent optical response from an ensemble of (In,Ga)As quantum dots (QDs) embedded in a planar Tamm-plasmon microcavity with a quality factor of approximately 100. Significant enhancement of the light-matter interaction is demonstrated under selective laser excitation of those quantum dots which are in resonance with the cavity mode. The enhancement is manifested through Rabi oscillations of the photon echo, demonstrating coherent control of excitons with picosecond pulses at intensity levels more than an order of magnitude smaller as compared with bare quantum dots. The decay of the photon echo transients is weakly changed by the resonator, indicating a small decrease of the coherence time T2 which we attribute to the interaction with the electron plasma in the metal layer located close (40 nm) to the QD layer. Simultaneously we see a reduction of the population lifetime T1, inferred from the stimulated photon echo, due to an enhancement of the spontaneous emission by a factor of 2, which is attributed to the Purcell effect, while nonradiative processes are negligible, as confirmed from time-resolved photoluminescence.}}, author = {{Salewski, M. and Poltavtsev, S. V. and Kapitonov, Yu. V. and Vondran, J. and Yakovlev, D. R. and Schneider, C. and Kamp, M. and Höfling, S. and Oulton, R. and Akimov, I. A. and Kavokin, A. V. and Bayer, M.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{3}}, publisher = {{American Physical Society (APS)}}, title = {{{Photon echoes from (In,Ga)As quantum dots embedded in a Tamm-plasmon microcavity}}}, doi = {{10.1103/physrevb.95.035312}}, volume = {{95}}, year = {{2017}}, } @article{6544, abstract = {{A picosecond acoustic pulse can be used to control the lasing emission from semiconductor nanostructures by shifting their electronic transitions. When the active medium, here an ensemble of (In,Ga)As quantum dots, is shifted into or out of resonance with the cavity mode, a large enhancement or suppression of the lasing emission can dynamically be achieved. Most interesting, even in the case when gain medium and cavity mode are in resonance, we observe an enhancement of the lasing due to shaking by coherent phonons. In order to understand the interactions of the nonlinearly coupled photon-exciton-phonon subsystems, we develop a semiclassical model and find an excellent agreement between theory and experiment.}}, author = {{Czerniuk, T. and Wigger, D. and Akimov, A. V. and Schneider, C. and Kamp, M. and Höfling, S. and Yakovlev, D. R. and Kuhn, T. and Reiter, D. E. and Bayer, M.}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, number = {{13}}, publisher = {{American Physical Society (APS)}}, title = {{{Picosecond Control of Quantum Dot Laser Emission by Coherent Phonons}}}, doi = {{10.1103/physrevlett.118.133901}}, volume = {{118}}, year = {{2017}}, } @article{6545, abstract = {{We develop a nanoscopy method with in-depth resolution for layered photonic devices. Photonics often requires tailored light field distributions for the optical modes used, and an exact knowledge of the geometry of a device is crucial to assess its performance. The presented acousto-optical nanoscopy method is based on the uniqueness of the light field distributions in photonic devices: for a given wavelength, we record the reflectivity modulation during the transit of a picosecond acoustic pulse. The temporal profile obtained can be linked to the internal light field distribution. From this information, a reverse-engineering procedure allows us to reconstruct the light field and the underlying photonic structure very precisely. We apply this method to the slow light mode of an AlAs/GaAs micropillar resonator and show its validity for the tailored experimental conditions.}}, author = {{Czerniuk, T. and Schneider, C. and Kamp, M. and Höfling, S. and Glavin, B. A. and Yakovlev, D. R. and Akimov, A. V. and Bayer, M.}}, issn = {{2334-2536}}, journal = {{Optica}}, number = {{6}}, publisher = {{The Optical Society}}, title = {{{Acousto-optical nanoscopy of buried photonic nanostructures}}}, doi = {{10.1364/optica.4.000588}}, volume = {{4}}, year = {{2017}}, } @inproceedings{6565, author = {{Jäger, Axel and Johannesmann, Sarah and Claes, Leander and Webersen, Manuel and Henning, Bernd and Kupnik, Mario}}, booktitle = {{2017 IEEE IUS~Proceedings}}, title = {{{Evaluating the Influence of 3D-Printing Parameters on Acoustic Material Properties}}}, year = {{2017}}, } @inproceedings{6635, author = {{Bendfeld, Jörg and Krauter, Stefan}}, booktitle = {{Proceedings of the 33rd European Photovoltaic Solar Energy Conference, Amsterdam, (Niederlande), 25.-29. Sept. 2017, S. 1477–1481}}, location = {{Amsterdam}}, title = {{{Update on rankings of conversion efficiencies and energy yield of micro-inverters, including inverters for two PV modules}}}, year = {{2017}}, } @inproceedings{6636, author = {{Bendfeld, Jörg and Krauter, Stefan}}, booktitle = {{Proceedings of the 33rd European Photovoltaic Solar Energy Conference, Amsterdam, (Niederlande), 25.-29. Sept. 2017, S. 1836–1840}}, location = {{Amsterdam}}, title = {{{Long-term performance of PV micro-inverters}}}, year = {{2017}}, } @inproceedings{6637, author = {{Krauter, Stefan and Wendlandt, S. and Süthoff, L. and Berendes, S. and Teubner, J. and Podlowski, L. and Berghold, J. and Grunow, Paul}}, booktitle = {{Proceedings of the 33rd European Photovoltaic Solar Energy Conference, Amsterdam, (Niederlande), 25.-29. Sept. 2017}}, location = {{Aḿsterdam}}, title = {{{Advanced PV Module Hot Spot Characterisation}}}, year = {{2017}}, } @inproceedings{6641, author = {{Khatibi, Arash and Bendfeld, Jörg and Bermpohl, Wolfgang and Krauter, Stefan}}, booktitle = {{Proceedings of the 33rd European Photovoltaic Solar Energy Conference, Amsterdam, (Niederlande), 25.-29. Sept. 2017}}, location = {{Amsterdam}}, title = {{{Introduction of an Advanced Method for Testing of Battery Charge Controllers for Off-Grid PV Systems}}}, year = {{2017}}, }