TY - CONF
AU - Eggert, A
AU - Thiesbrummel, C
AU - Deutscher, C
ID - 7738
T2 - 2013 AMA Winter Marketing Educators' Proceedings
TI - Exploring differential effects of product and service innovations on industrial firms’ financial performance
ER -
TY - CONF
AU - Cicconetti, Claudio
AU - Morelli, Arianna
AU - Dräxler, Martin
AU - Karl, Holger
AU - Mancuso, Vincenzo
AU - Sciancalepore, Vincenzo
AU - Gupta, Rohit
AU - de la Oliva, Antonio
AU - Isabel Sanchez, M.
AU - Serrano, Pablo
AU - Roullet, Laurent
ID - 774
T2 - 2013 Future Network & Mobile Summit, Lisboa, Portugal, July 3-5, 2013
TI - The playground of Wireless Dense networks of the future
ER -
TY - CONF
AU - Schumacher, Claudia
AU - Engels, Gregor
AU - Güldali, Baris
AU - Niehammer, Markus
AU - Hamburg, Matthias
ED - Kowalewski, Stefan
ED - Rumpe, Bernhard
ID - 8058
T2 - Proceedings of the conference on Software Enginneering, Fachtagung des GI Fachbereichs Softwaretechnik (SE 2013), Aachen (Germany)
TI - Modellbasierte Bewertung von Testprozessen nach TPI NEXT® mit Geschäftsprozess-Mustern
VL - P-213
ER -
TY - CONF
AU - Huma, Zille
AU - Gerth, Christian
AU - Engels, Gregor
AU - Juwig, Oliver
ID - 8060
T2 - Proceedings of the 11th International Conference on Service Oriented Computing (ICSOC'13)
TI - Automated Service Composition for On-the-Fly SOAs
VL - 8274
ER -
TY - JOUR
AB - We study three variants of multi-prover quantum Merlin-Arthur proof systems. We first show that the class of problems that can be efficiently verified using polynomially many quantum proofs, each of logarithmic-size, is exactly MQA (also known as QCMA), the class of problems which can be efficiently verified via a classical proof and a quantum verifier. We then study the class BellQMA(poly), characterized by a verifier who first applies unentangled, nonadaptive measurements to each of the polynomially many proofs, followed by an arbitrary but efficient quantum verification circuit on the resulting measurement outcomes. We show that if the number of outcomes per nonadaptive measurement is a polynomially-bounded function, then the expressive power of the proof system is exactly QMA. Finally, we study a class equivalent to QMA(m), denoted SepQMA(m), where the verifier's measurement operator corresponding to outcome "accept" is a fully separable operator across the m quantum proofs. Using cone programming duality, we give an alternate proof of a result of Harrow and Montanaro [FOCS, pp. 633--642 (2010)] that shows a perfect parallel repetition theorem for SepQMA(m) for any m.
AU - Gharibian, Sevag
AU - Sikora, Jamie
AU - Upadhyay, Sarvagya
ID - 8173
IS - 1-2
JF - Quantum Information & Computation
TI - QMA variants with polynomially many provers
VL - 13
ER -
TY - CONF
AU - Grieger , Marvin
AU - Sauer, Stefan
ID - 8488
T2 - Software Engineering 2013 Workshopband
TI - Wiederverwendbarkeit von Migrationswissen durch Techniken der modellgetriebenen Softwareentwicklung
ER -
TY - CONF
AU - Fazal-Baqaie , Masud
AU - Luckey , Markus
AU - Engels, Gregor
ID - 8490
T2 - Software Engineering 2013 Workshopband
TI - Assembly-based Method Engineering with Method Patterns
ER -
TY - CONF
AU - Liebendörfer, Michael
AU - Hochmuth, Reinhard
ED - Ubuz, Behiye
ED - Haser, Çiğdem}
ED - Mariotti, Maria Alessandra
ID - 8553
SN - 978-975-429-315-9
T2 - Proceedings of the 8th {Conference} of European Research in Mathematics Education
TI - Interest in Mathematics and the First Steps at the University
ER -
TY - CONF
AB - A basic autonomous system powered by a piezoelectric harvester contains three components apart from the harvester: a fullwave rectifier, a reservoir capacitor and an electronic device performing the primary task of the system. In this contribution, a model describing the operation of such a system is derived. It is found that in steady-state operation, the piezoelectric harvester experiences two alternating load conditions due to the rectification process. These alternating load conditions can have a significant effect on the operation of the harvester and must be considered in the design of autonomous systems. The results also show that such an autonomous system works efficiently if it is connected to a high impedance load and excited by a frequency matching the anti-resonance frequency of the piezoelectric harvester.
AU - Al-Ashtari, Waleed
AU - Hunstig, Matthias
AU - Hemsel, Tobias
AU - Sextro, Walter
ID - 9796
IS - 05/2013
KW - Energy harvesting
KW - harvester modeling
KW - load dependence
KW - generated voltage
T2 - Proceedings of 10th International Workshop on Piezoelectric Materials and Applications and 8th Energy Harvesting Workshop, Hannover, Germany, 14.-17.7.2013
TI - Characteristics of Piezoelectric Energy Harvesters in Autonomous Systems
ER -
TY - JOUR
AB - This contribution provides a systematic investigation and performance comparison of different modes of operation for piezoelectric inertia drives. The movement of these motors is classically assumed to consist of steps involving stiction and sliding, resulting in the term ``stick-slip drives''. In the first part of this contribution it has been found that using ideal driving signals, ``slip-slip'' operation without phases of stiction allows very high velocities, while the maximum velocity is limited principally in stick-slip operation. In this part it is shown that slip-slip operation is also suitable for use with real actuators, driven with frequency-limited versions of the ideal signals presented in part I. The motional performance of the motor as well as its wear and the required electric power are investigated for operation with different signals. It is found that for high velocity inertia motors it is recommendable to use actuators with large stroke and to drive them with a signal consisting of two harmonics at a high fundamental frequency, a result that is supported by similar setups implemented experimentally by other authors. Using Lanczos' \sigma factors to calculate the frequency-limited excitation signals instead of standard Fourier series additionally increases the motor performance significantly. The results help motor designers to choose the appropriate mode of operation and to optimise the motor parameters for their individual applications.
AU - Hunstig, Matthias
AU - Hemsel, Tobias
AU - Sextro, Walter
ID - 9804
JF - Sensors and Actuators A: Physical
KW - Inertia motor
TI - Stick-slip and slip-slip operation of piezoelectric inertia drives - Part II: Frequency-limited excitation
VL - 200
ER -