@article{29827, abstract = {{Die Entwicklung neuer Konfigurationen zur Rußabscheidung in Elektrofiltern im Hinblick auf Kfz-Applikationen bedingt die Notwendigkeit, diese auch mithilfe von Simulationen bewerten zu können. Der Beitrag stellt einen neuen Ansatz zur Simulation des Abscheideprozesses für einen Temperaturbereich bis 400 Grad C vor. Entscheidend ist die Möglichkeit, das raumladungsbehaftete elektrische Feld für alle Betriebszustände zu simulieren. Für den Transport der Raumladungen wird ein Ansatz aus der Mehrphasenströmungssimulation verwendet. Die Abscheidung der Partikeln wird mithilfe eines Lagrangeschen Ansatzes modelliert, der die zeitabhängige Aufladung unter lokalen elektrischen Bedingungen berücksichtigt. Die Simulation des Gesamtprozesses wird mit experimentellen Untersuchungen anhand eines Laborabscheiders verifiziert. Simulation und Experiment stimmen gut überein. Insbesondere der dominierende Einfluss durch die Bereiche in der Nähe der Platten konnte gut abgebildet werden. Das Gleiche gilt für die parabolische Form der Strom-Spannungs-Kennlinie. Weitere Untersuchungen sind erforderlich, um die gezeigten Methoden auf die Rußabscheidung zu übertragen. Die Problematik liegt in der Charakterisierung der Rußeigenschaften in Abhängigkeit von der Rußentstehung. Auch die Randbedingungen der Methoden zur elektrischen Charakterisierung können zurzeit noch nicht auf allgemeine Fälle übertragen werden. }}, author = {{Schmid, Hans-Joachim}}, issn = {{0949-8036}}, journal = {{Gefahrstoffe, Reinhaltung der Luft. Air Quality Control}}, number = {{4}}, title = {{{Neuer Ansatz zur Modellierung der Abscheidung in einem modifizierten Rohrelektrofilter}}}, volume = {{67}}, year = {{2007}}, } @inproceedings{34681, author = {{Behrent, Sigrid}}, booktitle = {{Band zur Tagung: Multilateralität und europäischer Bildungsauftrag, Bremen (20.-22. Juni 2006)}}, editor = {{Elsner, D. and Küster, L. and Viebrock, B.}}, location = {{Bremen}}, pages = {{165--178}}, publisher = {{Peter Lang}}, title = {{{En route vers un but commun: Besonderheiten der Kommunikation zwischen Sprachlernern und Implikationen für die Fremdsprachendidaktik.}}}, volume = {{31}}, year = {{2007}}, } @inproceedings{24068, author = {{Koch, Rainer and Harnasch, Rüdiger and Lee, Bo-Sik and Pottebaum, Jens}}, booktitle = {{Human Interface and the Management of Information. Interacting in Information Environments, Symposium on Human Interface 2007, Held as Part of HCI International 2007, Beijing, China, July 22-27, 2007, Proceedings, Part II}}, editor = {{Smith, Michael J. and Salvendy, Gavriel}}, isbn = {{978-3-540-73353-9}}, keywords = {{Ver{\}}, pages = {{1050--1059}}, publisher = {{Springer}}, title = {{{Rapid and Precise Mobile Data Processing for Fire Brigades and Rescue Services (SAFeR/GÜTER/SHARE)}}}, doi = {{10.1007/978-3-540-73354-6_114}}, year = {{2007}}, } @phdthesis{52643, author = {{Laroque, C. }}, isbn = {{978-3-939350-27-9}}, title = {{{Ein mehrbenutzerfähiges Werkzeug zur Modellierung und richtungsoffenen Simulation von wahlweise objekt- und funktionsorientiert gegliederten Fertigungssystemen}}}, volume = {{Band 208}}, year = {{2007}}, } @article{54935, abstract = {{Expression of connective tissue growth factor (CTGF) in endothelial cells is modulated by shear stress affecting the organization of the cytoskeleton. The molecular connection between alterations of actin and CTGF expression was investigated in human umbilical vein endothelial cells (HUVEC) and a microvascular endothelial cell line. Overexpression of nonpolymerizable monomeric actin R62D interfered with stress fiber formation in HUVEC and concomitantly reduced immunoreactive CTGF. In microvascular endothelial cells, flow-dependent upregulation of CTGF was prevented by this actin mutant. In contrast, overexpression of actin S14C strengthened filamentous actin and increased CTGF expression. These data indicated an inverse relationship between CTGF expression and monomeric actin. Coexpression of the mutant actins and different CTGF promoter constructs revealed an actin-sensitive site between 3 and 4.5 kb of the CTGF promoter. A CArG-like box at -3791 bp was responsible for actin-dependent CTGF induction as shown by mutagenesis. Overexpression of actin S14C activated the nonmutated promoter significantly more strongly than the mutated promoter. Actin polymerization is regulated by the small GTPase RhoA and activation of serum response factor (SRF). Overexpression of constitutively active RhoA or SRF significantly increased CTGF protein synthesis. The 4.5-kb promoter construct, but not the construct with a mutation in the CArG box, was activated by SRF or RhoA, providing evidence for a functional role of this site in CTGF induction. These findings provide novel evidence that monomeric actin is the connecting link between alterations in the cytoskeleton and CTGF gene expression and demonstrate the importance of SRF in regulating CTGF transcription.}}, author = {{Muehlich, Susanne and Cicha, Iwona and Garlichs, Christoph D. and Krueger, Bettina and Posern, Guido and Goppelt-Struebe, Margarete}}, journal = {{American Journal of Physiology-Cell Physiology}}, number = {{5}}, pages = {{C1732–C1738}}, publisher = {{American Physiological Society}}, title = {{{Actin-dependent regulation of connective tissue growth factor}}}, doi = {{10.1152/ajpcell.00552.2006}}, volume = {{292}}, year = {{2007}}, } @inproceedings{54946, abstract = {{The investigation and the development of self-organizing systems are especially needed for operation and control in massively distributed systems such as Sensor and Actor Networks (SANETs). The main issues addressed by self-organization techniques are scalability, network lifetime, and real-time support. In the literature, biological principles are often cited as inspirations for technical solutions, especially in the domain of self-organization. This concept already resulted in a good number of solutions with significant impact such as ant-based routing and immune system inspired network security solutions. In this paper, another specific biological field is investigated: cellular signaling cascades for event-specific reaction initiated by individual cells in collaboration with their direct neighbors. Information between cells are transmitted via proteins and result in the cascade of protein–protein or protein–DNA interactions to produce a specific cellular answer, e.g. the activation of cells or the transmission of mediators. These processes are programmed in every individual cell and lead to a coordinated reaction on a higher organization platform. We transferred these mechanisms to operation and control in SANETs. In particular, a rule-based processing scheme relying on the main concepts of cellular signaling cascades has been developed. It is relying on simple local rules and providing problem specific reaction such as local actuation control and data manipulation. We describe this Rule-based Sensor Network (RSN) technology and demonstrate comparative simulation results that show the feasibility of our approach.}}, author = {{Dressler, Falko and Dietrich, Isabel and German, Reinhard and Krueger, Bettina}}, booktitle = {{1st ACM/ICST International Conference on Autonomic Computing and Communication Systems (Autonomics 2007)}}, publisher = {{Association for Computing Machinery (ACM)}}, title = {{{Efficient Operation in Sensor and Actor Networks Inspired by Cellular Signaling Cascades}}}, doi = {{10.1145/1365562.1365572}}, year = {{2007}}, } @inproceedings{54947, abstract = {{In Wireless Sensor Networks (WSNs), address-based routing approaches often lead to severe problems due to node mobility, energy-saving sleep-cycles, and often missing or unreliable address information. Data-centric routing schemes such as flooding or gossiping solve these problems but may lead to congestion or starvation. Based on biologically inspired mechanisms known from cellular signaling pathways, we discovered potentials in enhancing the communication required for self-organization in network environments suffering from data paths with low reliability and time variations of the reliability. Using an importance factor for particular transmissions in combination with feedback loops, the overall quality of the global system can be increased. The resulting algorithm, Weighted Probabilistic Data Dissemination (WPDD), includes an inherent adaptation to changing network conditions. Congestion control is supported as well as prioritized data communication. This paper outlines the working behavior of WPDD and demonstrates its applicability based on selected simulation results.}}, author = {{Dressler, Falko and German, Reinhard and Krueger, Bettina}}, booktitle = {{IEEE Frontiers in the Convergence of Bioscience and Information Technologies (FBIT 2007)}}, pages = {{827–832}}, publisher = {{Institute of Electrical and Electronics Engineers (IEEE)}}, title = {{{Adaptive Data Dissemination in Sensor Networks using WPDD}}}, doi = {{10.1109/FBIT.2007.23}}, year = {{2007}}, } @article{36991, author = {{Weber, Jutta}}, journal = {{Journal Netzwerk Frauenforschung NRW Nr. 22/2007}}, number = {{Nr. 22/2007}}, pages = {{56--57}}, title = {{{Interdisziplinäre Kommunikation zwischen den ‚zwei Kulturen'}}}, year = {{2007}}, } @inproceedings{37076, abstract = {{An komplexe Steuersoftware werden harte Anforderungen bez ̈ug- lich der Einhaltung von Zeitschranken gestellt. Die richtige Wahl eines Echtzeit-Schedulingverfahrens ist hier entscheidend. Die Verwendung von Interrupts in einem Echtzeitsystem erlaubt die zeitnahe Reaktion auf externe Ereignisse. Sie erschwert allerdings die Vorhersagbarkeit von Zeitschranken. In diesem Bericht wird eine Methode zur abstrakten Simulation eines Echtzeitbetriebssystems (Real-Time Operating System/RTOS) in der Systembeschreibungssprache SystemC vorgestellt. Die Verwen- dung eines RTOS-Modelles in SystemC erlaubt die Evaluierung ver- schiedener Schedulingverfahren zu einem fr ̈uhen Zeitpunkt im Ent- wurf des Systems. Interrupts unterliegen allerdings nicht einem RTOS- Schedulingverfahren und m ̈ussen daher gesondert behandelt werden. Dieser Bericht beschreibt die Implementierung eines kanonischen RTOS-Modells zur fr ̈uhen Analyse von Schedulingverfahren, das ei- ne getrennte Modellierung von Task- und Interrupt-Scheduling er- laubt. Dieser Ansatz erlaubt die Trennung des hardwareabh ̈angigen Interrupt-Scheduling in ein separates Modell und eine Evaluierung des Schedules, das sich rein auf Tasks bezieht.}}, author = {{Zabel, Henning and Müller, Wolfgang}}, issn = {{1619-7879}}, number = {{4}}, title = {{{Simulation mit abstrakten RTOS Modellen in SystemC}}}, volume = {{6}}, year = {{2007}}, } @inproceedings{37083, author = {{Krupp, Alexander and Müller, Wolfgang}}, booktitle = {{Proceedings of the 21st European Conference on Modelling and Simulation (ECMS 2007)}}, title = {{{Systematic Testbench Specification for Constrained Randomized Test and Functional Coverage}}}, year = {{2007}}, } @article{26273, author = {{Mahnken, Rolf and Wilmanns, Stefan}}, issn = {{0921-5093}}, journal = {{Materials Science and Engineering: A}}, pages = {{376--378}}, title = {{{Simulation of asymmetric effects for shape memory alloys using the concept of stress mode dependent weighting functions}}}, doi = {{10.1016/j.msea.2007.04.128}}, year = {{2007}}, } @article{28209, author = {{Shaban, A. and Mahnken, Rolf and Wilke, L. and Potente, H. and Ridder, H.}}, issn = {{0020-7683}}, journal = {{International Journal of Solids and Structures}}, pages = {{6148--6162}}, title = {{{Simulation of rate dependent plasticity for polymers with asymmetric effects}}}, doi = {{10.1016/j.ijsolstr.2007.02.017}}, year = {{2007}}, } @article{26272, author = {{Mahnken, Rolf and Wilmanns, Stefan}}, issn = {{0927-0256}}, journal = {{Computational Materials Science}}, pages = {{295--305}}, title = {{{Simulation of asymmetric effects for shape memory alloys by decomposition of transformation strains}}}, doi = {{10.1016/j.commatsci.2007.07.042}}, year = {{2007}}, } @article{28773, author = {{Gockel, Franz-Barthold and Mahnken, Rolf}}, issn = {{1617-7061}}, journal = {{PAMM}}, pages = {{165--166}}, title = {{{Material Simulation and Damage Analysis at Thermal Shock Conditions}}}, doi = {{10.1002/pamm.200610063}}, year = {{2007}}, } @article{28771, author = {{Shaban, Ahmed and Mahnken, Rolf}}, issn = {{1617-7061}}, journal = {{PAMM}}, pages = {{409--410}}, title = {{{Simulation of Rate Dependent Plasticity of Polymers}}}, doi = {{10.1002/pamm.200610185}}, year = {{2007}}, } @article{28772, author = {{Mahnken, Rolf}}, issn = {{1617-7061}}, journal = {{PAMM}}, pages = {{395--396}}, title = {{{Simulation of Asymmetric Effects in Plasticity}}}, doi = {{10.1002/pamm.200610178}}, year = {{2007}}, } @phdthesis{25538, author = {{Wortmann, Raphael}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}}, title = {{{Methodische Entwicklung von Echtzeit 3D-Anwendungen für Schulung und Präsentation}}}, volume = {{187}}, year = {{2006}}, } @phdthesis{19613, author = {{Rührup, Stefan}}, isbn = {{978-3-939350-22-4}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}}, title = {{{Position-based Routing Strategies}}}, volume = {{203}}, year = {{2006}}, } @inproceedings{19854, abstract = {{In previous publications there have been several proposals
regarding replica generation and placement of movie content in
content-distribution-networks or P2P overlays. Within this paper
we extend approaches for heterogeneous placement scenarios
described in prior publications. Therefor we presume heterogeneous
server peers' bandwidth, HD capacity, and movie popularities.
Movie documents are replicated and placed onto server peers with
respect to the predicted popularity values. Thus each document
aims to gain fair networks resources according to its popularity.
We present simulation results of heuristics of different placement
strategies and compare them with a near optimal technique.}}, author = {{Schomaker, Gunnar and Loeser, Christoph and Schubert, Matthias}}, booktitle = {{5th International Conference on Networking (ICN).}}, title = {{{Predictive Replication and Placement Strategies for Movie Documents in heterogeneous Content Delivery Networks}}}, 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}}, }