@inproceedings{26701, abstract = {{Machines are omnipresent. They produce, they transport. Machines facilitate work and assist. The increasing penetration of mechanical engineering by information technology enables considerable benefits. We refer to such systems as advanced mechatronic systems, which relay on the close interaction of mechanics, electric/electronics, control engineering and software engineering. Hence, the design and production of such systems is an interdisciplinary and complex task. Our ambition is a new school for the design of advanced mechatronic systems. Consequently, we need an avant-garde basic system which can be used to develop and to test future applications. The miniature robot BeBot is such a basic system. This robot constitutes the test bench for the applications, being based on modern approaches, such as self-optimization, self-organization and self-coordination as well as on the use of new manufacturing technologies. }}, author = {{Gausemeier, Jürgen and Schierbaum, Thomas and Dumitrescu, Roman and Herbrechtsmeier, Stefan and Jungmann, Alexander}}, booktitle = {{Proceedings of the 9th IEEE International Conference on Industrial Informatics (INDIN)}}, publisher = {{IEEE}}, title = {{{Miniature Robot BeBot: Mechatronic Test Platform for Self-X Properties}}}, year = {{2011}}, } @inproceedings{26702, author = {{Thuy, Andreas}}, booktitle = {{Reconfigurable Communication-centric Systems-on-Chip (ReCoSoC), 2011 6th International Workshop on }}, publisher = {{IEEE Xplore}}, title = {{{ Comparison of periodic and aperiodic task models for cyber-physical-systems}}}, year = {{2011}}, } @article{26906, abstract = {{AbstractObjectiveNutrition-related health problems such as obesity are frequent among children and adolescents of Turkish descent living in Germany, yet data on their dietary habits are scarce. One reason might be the lack of validated assessment tools for this target group. We therefore aimed to validate protein and K intakes from one 24 h recall against levels estimated from one 24 h urine sample in children and adolescents of Turkish descent living in Germany.DesignCross-sectional analyses comprised estimation of mean differences, Pearson correlation coefficients, cross-classifications and Bland–Altman plots to assess the agreement between the nutritional intake estimated from a single 24 h recall and a single 24 h urine sample collected on the previous day.SettingDortmund, Germany.SubjectsData from forty-three study participants (aged 5–18 years; 26 % overweight) with a traditional Turkish background were included.ResultsThe 24 h recall significantly overestimated mean protein and K intake by 10·7 g/d (95 % CI of mean difference: 0·6, 20·7 g/d) and 344 mg/d (95 % CI 8, 680 mg/d), respectively. Correlations between intake estimates were r = 0·25 (P = 0·1) and 0·31 (P = 0·05). Both methods classified 70 % and 69 % of the participants into the same/adjacent quartile of protein and K intake and misclassified 7 % and 7 %, respectively, into the opposite quartile. Bland–Altman plots indicated a wide scattering of differences in both protein and K intake.ConclusionsAmong children and adolescents of traditional Turkish descent living in Germany, one 24 h recall may only be valid for categorizing subjects into high, medium or low consumers.}}, author = {{Bokhof, Beate and Buyken, Anette and Doğan, Canan and Karaboğa, Arzu and Kaiser, Josa and Sonntag, Antje and Kroke, Anja}}, issn = {{1368-9800}}, journal = {{Public Health Nutrition}}, pages = {{640--647}}, title = {{{Validation of protein and potassium intakes assessed from 24 h recalls against levels estimated from 24 h urine samples in children and adolescents of Turkish descent living in Germany: results from the EVET! Study}}}, doi = {{10.1017/s1368980011002734}}, year = {{2011}}, } @inproceedings{3186, author = {{Derrick, John and Schellhorn, Gerhard and Wehrheim, Heike}}, booktitle = {{{FM} 2011: Formal Methods - 17th International Symposium on Formal Methods, Limerick, Ireland, June 20-24, 2011. Proceedings}}, editor = {{J. Butler, Michael and Schulte, Wolfram}}, pages = {{323----337}}, title = {{{Verifying Linearisability with Potential Linearisation Points}}}, doi = {{10.1007/978-3-642-21437-0_25}}, year = {{2011}}, } @inproceedings{27627, author = {{Klompmaker, Florian and Nebe, Karsten and Busch, Clemens and Willemsen, Detlev}}, booktitle = {{Proceedings of the International Conference on Health Informatics}}, title = {{{User Centered Design Process of OSAMI-D: Developing User Interfaces for a Remote Ergometer Training Application}}}, year = {{2011}}, } @inproceedings{27628, author = {{Laroque, Christoph and Schulte, Jonas}}, booktitle = {{Proceedings of the 2011 Spring Simulation Multiconference}}, editor = {{Chinni, M.I and Weed, D}}, title = {{{KoProV: A Learning Approach for Coordinated Learning of Modeling and Simulation Based on Knowledge Modules}}}, year = {{2011}}, } @inproceedings{27631, author = {{Schulte, Jonas and Keil, Reinhard and Klaholt, D and Sauer, J}}, booktitle = {{Proceedings of the 13th International Conference on Enterprise Information Systems, SciTePress - Science and Technology Publications, Beijing, China}}, editor = {{Zhang, R and Cordeiro, José and Li, X and Zhang, Z and Zhang, J}}, pages = {{43--52}}, title = {{{Koi School - Towards the Next Level of Communication, Organization and Integration in Education}}}, year = {{2011}}, } @article{27744, abstract = {{The aim of the present study was to examine the association of pre-pubertal dietary energy density (ED) with both age and body fatness at the start of the pubertal growth spurt (age at take-off, ATO). Analyses included 219 DOrtmund Nutritional and Anthropometric Longitudinally Designed Study participants with sufficient height measurements to estimate ATO who provided 3 d weighed dietary records at baseline, i.e. 2 and 3 years before ATO (mean age 6·9 (sd 1·2) years). Mean energy intakes and amounts of foods/drinks consumed at baseline were derived from the records. ED (kJ/g) was calculated based on (1) all foods and drinks (ED_all), (2) foods and energy-containing drinks (ED_energy), (3) foods and milk as a drink, but no other beverages (ED_milk) and (4) foods only, solid or liquid (ED_food). Using multiple regression analyses, the association between the ED variables and ATO was investigated. Furthermore, Z-scores of BMI and fat mass index (FMI) at ATO were considered as outcomes to reflect body fatness at puberty onset. The results showed that ED at baseline was not associated with ATO, regardless of the ED method used. For example, mean ATO in the lowest v. highest tertile of ED_food was 9·3 (95 % CI 9·0, 9·5) v. 9·4 (95 % CI 9·1, 9·7) years, Ptrend = 0·8 (adjusted for sex, maternal age, birth weight, dietary protein, dietary fibre, baseline BMI Z-score). Similarly, ED was not independently associated with BMI or FMI Z-score at ATO (Ptrend = 0·3–0·9). In conclusion, dietary ED in childhood did not influence timing or body fatness at ATO in this cohort of healthy, free-living children.}}, author = {{Günther, Anke L. B. and Stahl, Lisa J. and Buyken, Anette and Kroke, Anja}}, issn = {{0007-1145}}, journal = {{British Journal of Nutrition}}, pages = {{345--349}}, title = {{{Association of dietary energy density in childhood with age and body fatness at the onset of the pubertal growth spurt}}}, doi = {{10.1017/s0007114511001772}}, year = {{2011}}, } @article{20947, abstract = {{Alkylphosphonic acids of different alkyl chain lengths were adsorbed on electrochemically polished NiTi surfaces from ethanolic solutions. The electropolishing process led to passive films mainly composed of Ti-oxyhydroxide. The surface showed nanoscopic etching pits with a depths of about 2 nm and a diameter of about 20 nm. The interfacial binding mechanism of the phosphonic acid group to the oxyhydroxide surface and the ordering of the monolayer were spectroscopically analysed by means of infrared reflection absorption FTIR-spectroscopy with (PM-IRRAS) and without (IRRAS) photoelastic modulation. The comparison of IRRAS and PM-IRRAS data of the long chain octadecylphosphonic acid monolayer proved that the binding mechanism of the phosphonic acid group to the oxyhydroxide surface is based on a mono-or bidentate bond, which is not stable in the presence of high water activities. An alkyl chain length of 17 CH2 groups is required for the formation of self-assembled monolayers, which are stable in aqueous environments. These long chain aliphatic organophosphonic acid monolayers were shown to inhibit anodic and cathodic surface reactions. (C) 2010 Elsevier B.V. All rights reserved.}}, author = {{Maxisch, M. and Ebbert, Christoph and Torun, B. and Fink, N. and de los Arcos, T. and Lackmann, J. and Maier, H. J. and Grundmeier, Guido}}, issn = {{1873-5584}}, journal = {{APPLIED SURFACE SCIENCE}}, number = {{6}}, pages = {{2011--2018}}, title = {{{PM-IRRAS studies of the adsorption and stability of organophosphonate monolayers on passivated NiTi surfaces}}}, doi = {{10.1016/j.apsusc.2010.09.044}}, volume = {{257}}, year = {{2011}}, } @inproceedings{17318, author = {{Brennecke, Andreas and Oevel, Gudrun and Strothmann, A.}}, booktitle = {{4. DFN-Forum Kommunikationstechnologien – Beiträge der Fachtagung 20./21.6.2011 Bonn}}, editor = {{Müller, P. and Neumair, B. and Dreo Rodosek, G.}}, location = {{Bonn}}, pages = {{69–78}}, publisher = {{Gesellschaft für Informatik}}, title = {{{Vom Studiolo zur virtuellen Forschungsumgebung}}}, volume = {{187}}, year = {{2011}}, } @inproceedings{17420, abstract = {{Occlusion culling is a common approach to accelerate real-time rendering of polygonal 3D-scenes by reducing the rendering load. Especially for large scenes, it is necessary to remove occluded objects to achieve a frame rate that provides an interactive environment. In order to benefit from the culling properly, often hierarchical data structures are used. These data structures typically create a spatial subdivision of a given scene into axis-aligned bounding boxes. These boxes can be tested quickly, but they are not very precise. By using these boxes, the included objects are detected as visible, even if other objects occlude them (false-positives). To get perfect results, the models’ original geometry included in the box has to be tested, but this would require too much computational power. To overcome this problem, original objects’ approximations could be used, but typical methods for mesh simplification cannot be applied, because they do not create an outer hull for a given object. We present a model simplification algorithm, which generates simple outer hulls, consisting of only few more triangles than a box, while preserving an object’s shape better than a corresponding bounding box. This approach is then extended to a hierarchical data structure, the so-called hull tree, that can be generated for a given scene to improve the visibility tests. Next, we present an approximative rendering algorithm, which combines the features of the hull tree with the use of inner hulls for efficient occlusion detection and global state-sorting of the visible objects. }}, author = {{Suess, Tim and Koch, Clemens and Jähn, Claudius and Fischer, Matthias}}, booktitle = {{Proceedings of the Graphics Interface 2011 Conference, May 25-27, St. John's, Newfoundland, Canada}}, editor = {{Brooks, Stephen and Irani, Pourang}}, pages = {{79----86}}, publisher = {{Canadian Human-Computer Communications Society}}, title = {{{Approximative occlusion culling using the hull tree}}}, year = {{2011}}, } @inproceedings{1891, author = {{W. Richa, Andrea and Scheideler, Christian and Schmid, Stefan and Zhang, Jin}}, booktitle = {{2011 International Conference on Distributed Computing Systems, ICDCS 2011, Minneapolis, Minnesota, USA, June 20-24, 2011}}, isbn = {{978-0-7695-4364-2}}, pages = {{507----516}}, publisher = {{IEEE Computer Society}}, title = {{{Competitive and Fair Medium Access Despite Reactive Jamming}}}, doi = {{10.1109/ICDCS.2011.8}}, year = {{2011}}, } @inproceedings{1893, author = {{W. Richa, Andrea and Scheideler, Christian and Schmid, Stefan and Zhang, Jin}}, booktitle = {{Proceedings of the 12th ACM Interational Symposium on Mobile Ad Hoc Networking and Computing, MobiHoc 2011, Paris, France, May 16-20, 2011}}, isbn = {{978-1-4503-0722-2}}, pages = {{15}}, publisher = {{ACM}}, title = {{{Self-stabilizing leader election for single-hop wireless networks despite jamming}}}, doi = {{10.1145/2107502.2107522}}, year = {{2011}}, } @inproceedings{1899, author = {{Kniesburges, Sebastian and Scheideler, Christian}}, booktitle = {{WALCOM: Algorithms and Computation - 5th International Workshop, WALCOM 2011, New Delhi, India, February 18-20, 2011. Proceedings}}, isbn = {{978-3-642-19093-3}}, pages = {{170----181}}, publisher = {{Springer}}, title = {{{Hashed Patricia Trie: Efficient Longest Prefix Matching in Peer-to-Peer Systems}}}, doi = {{10.1007/978-3-642-19094-0_18}}, volume = {{6552}}, year = {{2011}}, } @inproceedings{20621, author = {{Von Detten, S and Boguslawaski, D and Hanschke, U and Weiß, M and Baumeister, Jochen}}, booktitle = {{Fatigue: An Interdisciplinary approach}}, title = {{{The influence of fatigue on landing strategies after a stop jump}}}, year = {{2011}}, } @inbook{18098, author = {{Meise, B. and Meister, Dorothee M.}}, booktitle = {{stream your life!? }}, editor = {{Hoffmann, D. and Neuß, N. and Thiele, G.}}, pages = {{21 -- 32}}, publisher = {{kopaed}}, title = {{{Sozialität und Strukturen innerhalb von Social Network Sites. Theoretische und empirische Bezüge}}}, year = {{2011}}, } @unpublished{18194, abstract = {{We present a parallel rendering system for PC-Clusters to visualize large 3D scenes. One single visualization node, equipped with a high-end graphics adapter, is supported by a group of backend nodes with weak graphics performance. The objects of the scene are distributed among these backend nodes, they serve two purposes: First, they provide an out-of-core memory system for the visualization node. Second, they assist the visualization node's rendering by performing visibility calculations and only sending visible objects to the visualization node. In order to obtain fast rendering with our system, we have to distribute the objects among the backend nodes in a way that does not only guarantee an even distribution of the objects, but also an even distribution of the visibility calculations and the amount of data send to the visualization node. We identify necessary properties of the distribution and argue that a random distribution is a good candidate. Further, in order to reduce the number of objects sent to the visualization node per frame, we employ an approximate hierarchical occlusion culling in each backend node. For this, they are equipped, in addition to the objects assigned to them, with simplified versions of the other objects of the 3D scene. The visualization node is equipped with 512 MiB video memory and supported by 15 backend nodes. This system is able to render a approx. 350 million polygons (approx. 8.5 GiB) large aircraft model between 20 - 30 fps and thus allows a walkthrough in real-time.}}, author = {{Suess, Tim and Koch, Clemens and Jähn, Claudius and Fischer, Matthias and Meyer auf der Heide, Friedhelm}}, title = {{{Parallel Out-of-Core Occlusion Culling}}}, year = {{2011}}, } @article{21769, author = {{Angel, E. and Shreiner, D.}}, journal = {{IEEE Computer Graphics and Applications}}, number = {{2}}, pages = {{9--13}}, publisher = {{IEEE}}, title = {{{Teaching a Shader-Based Introduction to Computer Graphics}}}, doi = {{10.1109/MCG.2011.27}}, volume = {{31}}, year = {{2011}}, } @proceedings{929, editor = {{Frey, Hannes and Li, Xu and R{ührup, Stefan}}, isbn = {{978-3-642-22449-2}}, title = {{{Ad-hoc, Mobile, and Wireless Networks - 10th International Conference, ADHOC-NOW 2011, Paderborn, Germany, July 18-20, 2011. Proceedings}}}, doi = {{10.1007/978-3-642-22450-8}}, year = {{2011}}, } @article{7697, author = {{Marquardt, B. and Beckel, A. and Lorke, A. and Wieck, A. D. and Reuter, Dirk and Geller, M.}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, number = {{22}}, publisher = {{AIP Publishing}}, title = {{{The influence of charged InAs quantum dots on the conductance of a two-dimensional electron gas: Mobility vs. carrier concentration}}}, doi = {{10.1063/1.3665070}}, volume = {{99}}, year = {{2011}}, }