@phdthesis{2404, abstract = {{ In this thesis, we propose to use a reconfigurable processor as main computation element in embedded systems for applications from the multi-media and communications domain. A reconfigurable processor integrates an embedded CPU core with a Reconfigurable Processing Unit (RPU). Many of our target applications require real-time signal-processing of data streams and expose a high computational demand. The key challenge in designing embedded systems for these applications is to find an implementation that satisfies the performance goals and is adaptable to new applications, while the system cost is minimized. Implementations that solely use an embedded CPU are likely to miss the performance goals. Application-Specific Integrated Circuit (ASIC)-based coprocessors can be used for some high-volume products with fixed functions, but fall short for systems with varying applications. We argue that a reconfigurable processor with a coarse-grained, dynamically reconfigurable array of modest size provides an attractive implementation platform for our application domain. The computational intensive application kernels are executed on the RPU, while the remaining parts of the application are executed on the CPU. Reconfigurable hardware allows for implementing application specific coprocessors with a high performance, while the function of the coprocessor can still be adapted due to the programmability. So far, reconfigurable technology is used in embedded systems primarily with static configurations, e.g., for implementing glue-logic, replacing ASICs, and for implementing fixed-function coprocessors. Changing the configuration at runtime enables a number of interesting application modes, e.g., on-demand loading of coprocessors and time-multiplexed execution of coprocessors, which is commonly denoted as hardware virtualization. While the use of static configurations is well understood and supported by design-tools, the role of dynamic reconfiguration is not well investigated yet. Current application specification methods and design-tools do not provide an end-to-end tool-flow that considers dynamic reconfiguration. A key idea of our approach is to reduce system cost by keeping the size of the reconfigurable array small and to use hardware virtualization techniques to compensate for the limited hardware resources. The main contribution of this thesis is the codesign of a reconfigurable processor architecture named ZIPPY, the corresponding hardware and software implementation tools, and an application specification model which explicitly considers hardware virtualization. The ZIPPY architecture is widely parametrized and allows for specifying a whole family of processor architectures. The implementation tools are also parametrized and can target any architectural variant. We evaluate the performance of the architecture with a system-level, cycle-accurate cosimulation framework. This framework enables us to perform design-space exploration for a variety of reconfigurable processor architectures. With two case studies, we demonstrate, that hardware virtualization on the Zippy architecture is feasible and enables us to trade-off performance for area in embedded systems. Finally, we present a novel method for optimal temporal partitioning of sequential circuits, which is an important form of hardware virtualization. The method based on Slowdown and Retiming allows us to decompose any sequential circuit into a number of smaller, communicating subcircuits that can be executed on a dynamically reconfigurable architecture. }}, author = {{Plessl, Christian}}, isbn = {{978-3-8322-5561-3}}, keywords = {{Zippy}}, publisher = {{Shaker Verlag}}, title = {{{Hardware virtualization on a coarse-grained reconfigurable processor}}}, doi = {{10.2370/9783832255619}}, year = {{2006}}, } @article{2405, author = {{Groppe, Sven and Böttcher, Stefan and Birkenheuer, Georg and Höing, André}}, journal = {{Data & Knowledge Engineering}}, number = {{1}}, pages = {{64--110}}, publisher = {{Elsevier}}, title = {{{Reformulating XPath queries and XSLT queries on XSLT views}}}, doi = {{10.1016/j.datak.2005.04.002}}, volume = {{57}}, year = {{2006}}, } @inproceedings{2406, author = {{Voss, Kerstin}}, booktitle = {{Proc. Int. Conf. on Networking and Services (ICNS)}}, isbn = {{0-7695-2622-5}}, pages = {{68}}, publisher = {{IEEE Computer Society}}, title = {{{Risk Aware Migrations for Prepossessing SLAs}}}, doi = {{10.1109/ICNS.2006.94}}, year = {{2006}}, } @inproceedings{2407, author = {{Lietsch, Stefan and Zabel, Henning and Berssenbruegge, Jan and Wittenberg, Veit and Eikermann, Martin}}, booktitle = {{Proc. Int. Symp. on Visual Computing (ISVC)}}, isbn = {{3-540-48628-3}}, pages = {{343--353}}, publisher = {{Springer}}, title = {{{Light Simulation in a Distributed Driving Simulator}}}, doi = {{10.1007/11919476_35}}, volume = {{4291}}, year = {{2006}}, } @inproceedings{2408, author = {{Lerch, Nicolas and Nitsche, Holger and Voss, Kerstin and Hovestadt, Matthias}}, booktitle = {{Proc. Cracow Grid Workshop (CGW)}}, pages = {{216--223}}, title = {{{First Steps of a Monitoring Framework to Empower Risk Assessment on Grids}}}, year = {{2006}}, } @inproceedings{2409, author = {{Birkenheuer, Georg and Döhre, Sven and Hovestadt, Matthias and Kao, Odej and Voss, Kerstin}}, booktitle = {{Proc. Cracow Grid Workshop (CGW)}}, title = {{{On Similarities of Grid Resources for Identifying Potential Migration Targets}}}, year = {{2006}}, } @inproceedings{2410, author = {{Birkenheuer, Georg and Djemame, Karim and Gourlay, Iain and Kao, Odej and Padgett, James and Voß, Kerstin}}, booktitle = {{Proc. WS-Agreement Workshop (Open Grid Forum 18)}}, title = {{{Using WS-Agreement for Risk Management in the Grid}}}, year = {{2006}}, } @inproceedings{24277, abstract = {{We propose a dynamic, ad-hoc communication network consisting of mobile units that can warn about traffic jams on motorways. Our goal is to provide a practical, low cost solution. Therefore we consider very simple wireless communication hardware, without collision detection, with very small bandwidth and a probabilistic model of link failure. We provide a complete system architecture. For this purpose we design and analyze solutions for size approximation, leader election and broadcasting. Our algorithms are fine-tuned for fast operation in a practical setting. We provide both a theoretical and experimental evaluation of our solutions. Our contribution is much different from the previous work, where either pure theoretical models with a pure theoretical analysis are provided or algorithms working in practical models are evaluated only through simulations.}}, author = {{Kutyłowski, Jarosław and Zagórski, Filip}}, booktitle = {{SOFSEM 2006: Theory and Practice of Computer Science}}, issn = {{0302-9743}}, title = {{{Reliable Broadcasting Without Collision Detection}}}, doi = {{10.1007/11611257_37}}, year = {{2006}}, } @article{25932, author = {{Buyken, Anette and Kellerhoff, Y and Hahn, S and Kroke, A and Remer, T}}, issn = {{0022-3166}}, journal = {{J Nutr}}, number = {{7}}, pages = {{1828--1833}}, title = {{{Urinary C-peptide excretion in free-living healthy children is related to dietary carbohydrate intake but not to the dietary glycemic index.}}}, doi = {{10.1093/jn/136.7.1828}}, volume = {{136}}, year = {{2006}}, } @article{25933, author = {{Karaolis-Danckert, N and Buyken, Anette and Bolzenius, K and Perim de Faria, C and Lentze, MJ and Kroke, A}}, issn = {{0002-9165}}, journal = {{Am J Clin Nutr}}, number = {{6}}, pages = {{1449--1455}}, title = {{{Rapid growth among term children whose birth weight was appropriate for gestational age has a longer lasting effect on body fat percentage than on body mass index.}}}, doi = {{10.1093/ajcn/84.6.1449}}, volume = {{84}}, year = {{2006}}, } @inbook{2597, author = {{Betz, Stefan}}, booktitle = {{E-Business im industriellen Management - Theoretische Fundierung und praktische Umsetzung im Mittelstand}}, editor = {{Betz, Stefan}}, pages = {{91 -- 109}}, title = {{{Auswahl einer E-Procurement-Strategie als betriebswirtschaftliches Entscheidungsproblem}}}, year = {{2006}}, } @book{2598, editor = {{Betz, Stefan}}, title = {{{E-Business im industriellen Management - Theoretische Fundierung und praktische Umsetzung im Mittelstand}}}, year = {{2006}}, } @inbook{2599, author = {{Betz, Stefan}}, booktitle = {{E-Business im industriellen Management - Theoretische Fundierung und praktische Umsetzung im Mittelstand}}, editor = {{Betz, Stefan}}, pages = {{127 -- 155}}, title = {{{Fuzzyfizierte Deckungsbeitragsrechnung für Produkte auf elektronischen Märkten}}}, year = {{2006}}, } @article{26145, abstract = {{The drag force on aggregates and partially sintered agglomerates is assessed using the lattice Boltzmann method (LBM) and accelerated Stokesian dynamics (ASD). Both methods have been compared in terms of accuracy and computational effort. It is shown that they give comparable results if all numerical parameters are controlled carefully. LBM requires a much higher computational effort, however, in contrast to ASD it is able to simulate partially sintered agglomerates as well. The results show that even a very small amount of sintering leads to a significant reduction in the drag force. The analysis of the drag force on agglomerates as well as on aggregates shows that there is no simple geometric quantity which is uniquely related to the drag force. Moreover, there is a significant variation in drag force for single aggregates at different orientations or for the orientation averaged drag force of different aggregates of the same size. This is explained by the structural effects which may lead to a variation in the drag force up to +-20%.}}, author = {{Binder, Christian and Feichtinger, Christian and Schmid, Hans-Joachim and Thürey, Nils and Peukert, Wolfgang and Rüde, Ulrich}}, issn = {{0021-9797}}, journal = {{Journal of Colloid and Interface Science}}, number = {{1}}, pages = {{155--167}}, title = {{{Simulation of the hydrodynamic drag of aggregated particles}}}, doi = {{10.1016/j.jcis.2006.04.045}}, volume = {{301}}, year = {{2006}}, } @article{26148, abstract = {{Die Modellierung der wandnahen Bereiche bei der Simulation von Zweiphasenströmungen spielt in der Praxis eine entscheidende Rolle, wenn erwünschter oder unerwünschter Transport der dispersen Phase zu einer Oberfläche bedeutend ist. Zweiphasenströmungen mit einer dispersen Phase werden heutzutage häufig mit dem Euler-Lagrange-Verfahren in modernen CFD-Codes simuliert. Im Folgenden wird darauf eingegangen werden, wie solche Berechnungen in kommerziellen CFD-Codes durchgeführt werden.}}, author = {{Horn, M. and Schmid, Hans-Joachim}}, issn = {{0009-286X}}, journal = {{Chemie Ingenieur Technik}}, number = {{6}}, pages = {{694--699}}, title = {{{Modellierung der wandnahen Bereiche in turbulenten Zweiphasenströmungen}}}, doi = {{10.1002/cite.200500110}}, volume = {{78}}, year = {{2006}}, } @article{26150, abstract = {{This work investigates the effects of reduced accessible surface area of aggregate particles and of surface energy on relevant particle formation and growth mechanisms during titania formation from the vapour phase at industrial process conditions. Growth due to surface reaction and due to condensation is related to the fraction of the surface area that is exposed to the collision with single molecules. Surface shielding is found to hamper surface reaction and condensation once fractal aggregates start to form. It leads to significantly retarded precursor consumption and produces aggregate particles, which consist of more, but smaller primary particles. Surface energy data are varied within a range as proposed by available literature data. Moderate and high surface energy values result in a thermodynamic barrier to the formation of new particles and are shown to reduce the formation of seed particles by several orders of magnitude. This leads to the formation of aggregate particles which consist of a rather small number of primary particles and mainly grow by surface reaction. The primary contribution of condensation to growth of individual primary particles is shown to be very little. However, condensation should not be neglected as it has a strong impact on particle formation rates and hence on product characteristics such as the number of primary particles and primary particle size.}}, author = {{Artelt, C. and Schmid, Hans-Joachim and Peukert, W.}}, issn = {{0009-2509}}, journal = {{Chemical Engineering Science}}, number = {{1}}, pages = {{18--32}}, title = {{{Modelling titania formation at typical industrial process conditions: effect of surface shielding and surface energy on relevant growth mechanisms}}}, doi = {{10.1016/j.ces.2004.12.053}}, volume = {{61}}, year = {{2006}}, } @book{26721, author = {{Hellmich, Frank and Kiper, Hanna}}, publisher = {{Beltz}}, title = {{{Einführung in die Grundschuldidaktik }}}, year = {{2006}}, } @inbook{26795, author = {{Wernke, Stephan and Hellmich, Frank}}, booktitle = {{Beiträge zum Mathematikunterricht 2006}}, pages = {{255--258}}, publisher = {{Franzbecker}}, title = {{{Lernstrategien, Metakognitionen und Motivationen von Kindern im Mathematikunterricht. }}}, year = {{2006}}, } @article{26798, author = {{Hellmich, Frank}}, journal = {{Grundschule}}, pages = {{46--47}}, title = {{{Gewusst wie! – Lernstrategien von Kindern. Moderation des Themenschwerpunktes `Lernstrategien von Kindern´}}}, volume = {{7/8}}, year = {{2006}}, } @inbook{26799, author = {{Hellmich, Frank}}, booktitle = {{Professionelles Handeln in der Grundschule – Entwicklungslinien und Forschungsbefunde}}, editor = {{Hinz, Renate and Pütz, Tanja}}, pages = {{228--233}}, publisher = {{Schneider Hohengehren}}, title = {{{Aspekte des Lehrens und Lernens in der Grundschule}}}, year = {{2006}}, }