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International Wireless Communications and Mobile Computing Conference

作者： Sebastian Unger Stefan Pfeiffer Dirk Timmermann Institute of Applied Microelectronics and Computer Engineering University of Rostock Germany

ISBN: (纸本)9781457713781;9781457713798

What visions of technologies such as the Internet of Things (IoT), Pervasive Computing (PC) or Ambient Intelligence(AI) have in common is that they employ a very high amount of critically resource-constrained devices. This of course raises a whole set of new security challenges. Instead of proposing another middleware for IoT, PC or AI, and presenting a security approach for it we focus on existing, widely-adopted security mechanisms and concepts and give a comprehensive overview. Furthermore, we examine the Web Service security suite as an example for a comprehensive security framework on application level. We use an intentionally kept simple scenario including light bulbs and switches to demonstrate necessary security mechanisms and properties and to judge applicability of the presented existing security techniques and frameworks.

关键词： Devices Profile for Web Services DPWS Internet of Things Pervasive Computing Security SOA for devices

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Regulation of T-type Calcium Channels in Osteoblasts on Micro-Structured Surface Topography

Regulation of T-type Calcium Channels in Osteoblasts on Micr...

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2012 International Conference on Biomaterial and Bioengineering(ICBB 2012)

作者： Susanne Staehlke Friederike Kunz Ronny Loeffler Claudia Matschegewski Monika Fleischer Dieter P.Kern J.Barbara Nebe Rostock University Medical Center Department of Cell Biology University of Rostock Faculty of Computer Science and Electrical Engineering Institute of General Electrical Engineering University of Tuebingen Institute for Applied Physics

Micro-and nanotopography as well as the surface chemistry of biomaterials affect cell adhesion, proliferation and cell differentiation. Furthermore, the organization and localization of intracellular adhesion components such as the actin cytoskeleton are also altered dependent on the material surface topography. However, the detailed influence of the material micro-structure on cellular mechanisms on the molecular level is still unknown. This study is intended to elucidate such effects using regular pillar structures to characterize the modulation of cell responses like the regulation of voltage-sensitive calcium channels as well as signaling molecules in human osteoblasts. To analyze cell behavior on defined biomaterial surfaces, human osteoblastic MG-63 cells were cultured on geometrically micro-textured titanium coated silicon wafers, as opposed to planar titanium references. Samples were fabricated by a photolithographic process using the negative tone resist SU-8 and sputter-coated with 100 nm titanium. Immunofluorescence staining and flow cytometry are used to detect the expression levels and the function of T-type calcium channels. Knowledge about the biocomplexity of cell behavior dependent on topographical characteristics is of clinical relevance for the development of implant designs in tissue engineering.

关键词： Regular micro-topography SU-8 MG-63 Osteoblasts Signaling protein MEK1 T-type calcium channel

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Decoding of Raptor codes on embedded systems

Decoding of Raptor codes on embedded systems

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作者： Mladenov, Todor Nooshabadi, Saeid Montiel-Nelson, Juan A. Kim, Kiseon Gwangju 500-712 Korea Republic of Gwangju 500-712 Korea Republic of Dept. of Electrical and Computer Engineering Michigan Technological University Houghton MI 49931 United States Institute for Applied Microelectronics University of Las Palmas de Gran Canaria 35017 Las Palmas de Gran Canaria Spain

Raptor codes have been proven very suitable for mobile multimedia content delivery. A systematic Raptor code is employed for the application layer Forward Error Correction (FEC), schemes of the 3rd Generation Partnership Project (3GPP), Multimedia Broadcast/Multicast Service (MBMS) and standard and the IP Datacast over Digital Video Broadcasting (DVB) services. Those services run on mobile devices powered by embedded systems. This paper analyzes the performance, energy profile and resource implication of Raptor decoder on a system on a chip (SoC) platform with a soft-core embedded processor. At the heart of the Raptor decoder for binary erasure channel (BEC) is the decoding of the pre-code. The following three methods are used for that task: Belief Propagation (BP), Gaussian Elimination (GE) and the 3GPP inactivation decoding Gaussian elimination (IDGE). The paper analyzes the error correction capability and the complexity of each algorithm on embedded system. Additionally, the paper investigates how the cache size, matrix memory type and organization affect the algorithms under consideration. Finally, a power and energy dissipation analysis for the operation of the three algorithms under consideration is presented. © 2012 Elsevier B.V. All rights reserved.

关键词： Belief propagation

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A lightweight SOAP over CoAP transport binding for resource constraint networks

A lightweight SOAP over CoAP transport binding for resource ...

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8th IEEE International Conference on Mobile Ad-hoc and Sensor Systems, MASS 2011

作者： Moritz, Guido Golatowski, Frank Timmermann, Dirk University of Rostock Institute of Applied Microelectronics and Computer Engineering 18055 Rostock Germany

ISBN: (纸本)9780769544694

A huge momentum towards IP enabled Wireless Sensor Networks (WSN) appeared through the emerging 6LoWPAN protocols (i.e. IPv6 over Low power Wireless Personal Area Networks). By using existing cross domain open standards in contrast of proprietary solutions, technologies and deployments are not tailored too tight for specific applications. Nevertheless, 6LoWPAN is only the first step. Still efforts on higher layers on top of 6LoWPAN are an urgent need to provide the seamless connectivity and interaction of highly resource constrained devices with higher valued applications and services. This paper describes a new approach to bind SOAP to the emerging Constrained Application Protocol (CoAP) protocol. Thereby, CoAP provides a lightweight but reliable transport binding for SOAP. Compared to the widespread TCP based HTTP binding, round trip times can be reduced by 43% in an exemplary scenario because of the omitted expensive bidirectional TCP handshake mechanisms. Combined with dedicated XML compressors like EXI, SOAP based protocols become also applicable in WSNs. © 2011 IEEE.

关键词： Wireless sensor networks

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Implementing powerful Web Services for highly resource-constrained devices

Implementing powerful Web Services for highly resource-const...

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2011 9th IEEE International Conference on Pervasive Computing and Communications Workshops, PERCOM Workshops 2011

作者： Lerche, Christian Laum, Nico Moritz, Guido Zeeb, Elmar Golatowski, Frank Timmermann, Dirk Institute of Applied Microelectronics and Computer Engineering University of Rostock 18119 Rostock Germany

ISBN: (纸本)9781612849379

Web Service technologies are state of the art in current enterprise distributed applications. To integrate highly resource-constrained devices, such as sensor nodes, into enterprise applications via Web Services, gateways are commonly used. Our aim was to investigate the intermediate, homogeneous communication between enterprise applications and highly resource-constrained devices. We therefore present the prototype implementation of an embedded enterprise compatible W3C Web Service solution. Furthermore, we give an evaluation of memory requirements and a timing analysis for a representative platform with 48 KiB of ROM, 10 KiB of RAM and IEEE 802.15.4 radio. As the prototype implementation requires only 8:5 KiB of ROM and 3 KiB of RAM, our results claim that enterprise Web Services, despite of prevailing assumptions, are feasible in this context. © 2011 IEEE.

关键词： Web services

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Monitoring and Control of Temperature in Networks-on-Chip 6

Monitoring and Control of Temperature in Networks-on-Chip

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6th Doctoral Workshop on Mathematical and engineering Methods in computer Science, MEMICS 2010

作者： Wegner, Tim Cornelius, Claas Tockhorn, Andreas Timmermann, Dirk Institute of Applied Microelectronics and Computer Engineering University of Rostock Richard-Wagner-Str. 31 Rostock-Warnemuende 18119 Germany

ISBN: (纸本)9783939897224

Increasing integration densities and the emergence of nanotechnology cause issues related to reliability and power consumption to become dominant factors for the design of modern multi-core systems. Since the arising problems are enforced by high circuit temperatures, monitoring and control of on-chip temperature profiles need to be considered during design phase as well as during system operation. Hence, in this paper different approaches for the realization and integration of a monitoring system for temperature in multi-core systems based on Networks-on-Chip (NoCs) in combination with Dynamic Frequency Scaling (DFS) are investigated. Results show that both combinations using event-driven and time-driven forwarding more than double overall execution time and considerably reduce throughput of application data. Regarding performance of notification and reaction to temperature development event-driven forwarding clearly outperforms time-driven forwarding. © Tim Wegner, Claas Cornelius, Andreas Tockhorn, Dirk Timmermann;licensed under Creative Commons License NC-ND

关键词： Network-on-chip

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Impact of proactive temperature management on performance of Networks-on-Chip

Impact of proactive temperature management on performance of...

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13th International Symposium on System-on-Chip, SoC 2011

作者： Wegner, Tim Gag, Martin Timmermann, Dirk Institute of Applied Microelectronics and Computer Engineering University of Rostock Richard-Wagner-Str. 31 18119 Rostock-Warnemuende Germany

ISBN: (纸本)9781457706721

With the progress of deep submicron technology power consumption and temperature related issues have become dominant factors for chip design. Therefore, very large-scale integrated systems like Systems-on-Chip (SoCs) are exposed to an increasing thermal stress. On the one hand, this necessitates effective mechanisms for thermal management. On the other hand, appliance of thermal management is accompanied by disturbance of system integrity and degradation of system performance. In this paper we propose to precompute and proactively manage on-chip temperature of systems based on Networks-on-Chip (NoCs). Thereby, traditional reactive approaches, utilizing the NoC infrastructure to perform thermal management, can be replaced. This results not only in shorter response times for appliance of management measures and therefore in a reduction of temperature and thermal imbalances, but also in less impairment of system integrity and performance. Simulations show that proactive management achieves improvements of nearly 150% regarding reduction of average temperature inside a 33 NoC compared to identical reactive approaches, while mitigating additional delay for packet transmission by more than 50 %. © 2011 IEEE.

关键词： Network-on-chip

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Combining scalability and resource awareness in Wireless Sensor Network localization

Combining scalability and resource awareness in Wireless Sen...

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2011 IEEE Conference on computer Communications Workshops, INFOCOM WKSHPS 2011

作者： Behnke, Ralf Born, Alexander Salzmann, Jakob Timmermann, Dirk Bill, Ralf Institute of Applied Microelectronics and Computer Engineering University of Rostock Rostock 18057 Germany Faculty for Agricultural and Environmental Sciences Department of Geodesy and Geoinformatics University of Rostock Rostock 18057 Germany

ISBN: (纸本)9781457702488

Wireless Sensor Networks (WSNs) have been shown to be most suitable for monitoring large and possibly inaccessible areas. To assign measured values to certain positions as well as for complex network algorithms, localization represents a required basic capability. By splitting a costly localization calculation into precalculation and postcalculation, Distributed Least Squares (DLS) has been introduced as an efficient approach of fine grained localization. © 2011 IEEE.

关键词： Scalability

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Observation of the Decay Bc+→Bs0π+

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Physical Review Letters 2013年第18期111卷 181801-181801页

作者： R. Aaij B. Adeva M. Adinolfi C. Adrover A. Affolder Z. Ajaltouni J. Albrecht F. Alessio M. Alexander S. Ali G. Alkhazov P. Alvarez Cartelle A. A. Alves, Jr. S. Amato S. Amerio Y. Amhis L. Anderlini J. Anderson R. Andreassen J. E. Andrews R. B. Appleby O. Aquines Gutierrez F. Archilli A. Artamonov M. Artuso E. Aslanides G. Auriemma M. Baalouch S. Bachmann J. J. Back C. Baesso V. Balagura W. Baldini R. J. Barlow C. Barschel S. Barsuk W. Barter Th. Bauer A. Bay J. Beddow F. Bedeschi I. Bediaga S. Belogurov K. Belous I. Belyaev E. Ben-Haim G. Bencivenni S. Benson J. Benton A. Berezhnoy R. Bernet M.-O. Bettler M. van Beuzekom A. Bien S. Bifani T. Bird A. Bizzeti P. M. Bjørnstad T. Blake F. Blanc J. Blouw S. Blusk V. Bocci A. Bondar N. Bondar W. Bonivento S. Borghi A. Borgia T. J. V. Bowcock E. Bowen C. Bozzi T. Brambach J. van den Brand J. Bressieux D. Brett M. Britsch T. Britton N. H. Brook H. Brown A. Bursche G. Busetto J. Buytaert S. Cadeddu O. Callot M. Calvi M. Calvo Gomez A. Camboni P. Campana D. Campora Perez A. Carbone G. Carboni R. Cardinale A. Cardini H. Carranza-Mejia L. Carson K. Carvalho Akiba G. Casse L. Cassina L. Castillo Garcia M. Cattaneo Ch. Cauet R. Cenci M. Charles Ph. Charpentier P. Chen S.-F. Cheung N. Chiapolini M. Chrzaszcz K. Ciba X. Cid Vidal G. Ciezarek P. E. L. Clarke M. Clemencic H. V. Cliff J. Closier C. Coca V. Coco J. Cogan E. Cogneras P. Collins A. Comerma-Montells A. Contu A. Cook M. Coombes S. Coquereau G. Corti B. Couturier G. A. Cowan D. C. Craik S. Cunliffe R. Currie C. D’Ambrosio P. David P. N. Y. David A. Davis I. De Bonis K. De Bruyn S. De Capua M. De Cian J. M. De Miranda L. De Paula W. De Silva P. De Simone D. Decamp M. Deckenhoff L. Del Buono N. Déléage D. Derkach O. Deschamps F. Dettori A. Di Canto H. Dijkstra M. Dogaru S. Donleavy F. Dordei A. Dosil Suárez D. Dossett A. Dovbnya F. Dupertuis P. Durante R. Dzhelyadin A. Dziurda A. Dzyuba S. Easo U. Egede V. Egorychev S. Eidelman D. van Eijk S. Eisenhardt U. Eitschberger R. Ekelhof L. Eklund I. El Rifai Ch. Elsasser A. Falab Nikhef National Institute for Subatomic Physics Amsterdam The Netherlands Universidad de Santiago de Compostela Santiago de Compostela Spain H. H. Wills Physics Laboratory University of Bristol Bristol United Kingdom CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Oliver Lodge Laboratory University of Liverpool Liverpool United Kingdom Clermont Université Université Blaise Pascal CNRS/IN2P3 LPC Clermont-Ferrand France Fakultät Physik Technische Universität Dortmund Dortmund Germany European Organization for Nuclear Research (CERN) Geneva Switzerland School of Physics and Astronomy University of Glasgow Glasgow United Kingdom Petersburg Nuclear Physics Institute (PNPI) Gatchina Russia Sezione INFN di Roma La Sapienza Roma Italy Universidade Federal do Rio de Janeiro (UFRJ) Rio de Janeiro Brazil Sezione INFN di Padova Padova Italy LAL Université Paris-Sud CNRS/IN2P3 Orsay France Sezione INFN di Firenze Firenze Italy Physik-Institut Universität Zürich Zürich Switzerland University of Cincinnati Cincinnati Ohio USA University of Maryland College Park Maryland USA School of Physics and Astronomy University of Manchester Manchester United Kingdom Max-Planck-Institut für Kernphysik (MPIK) Heidelberg Germany Laboratori Nazionali dell’INFN di Frascati Frascati Italy Institute for High Energy Physics (IHEP) Protvino Russia Syracuse University Syracuse New York USA Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany Department of Physics University of Warwick Coventry United Kingdom Institute of Theoretical and Experimental Physics (ITEP) Moscow Russia Sezione INFN di Ferrara Ferrara Italy Cavendish Laboratory University of Cambridge Cambridge United Kingdom Ecole Polytechnique Fédérale de Lausanne (EPFL) Lausanne Switzerland Sezione INFN di Pisa Pisa Italy Centro Brasileiro de Pesquisas Físicas (CBPF) Rio de Janeiro Brazil LPNHE Université Pierre et Marie Curie Université Paris Diderot CNRS/IN2P3 Pari

The result of a search for the decay Bc+→Bs0π+ is presented, using the Bs0→Ds−π+ and Bs0→J/ψϕ channels. The analysis is based on a data sample of pp collisions collected with the LHCb detector, corresponding to an integrated luminosity of 1 fb−1 taken at a center-of-mass energy of 7 TeV, and 2 fb−1 taken at 8 TeV. The decay Bc+→Bs0π+ is observed with significance in excess of 5 standard deviations independently in both decay channels. The measured product of the ratio of cross sections and branching fraction is [σ(Bc+)/σ(Bs0)]×B(Bc+→Bs0π+)=[2.37±0.31 (stat)±0.11 (syst)−0.13+0.17(τBc+)]×10−3, in the pseudorapidity range 2<η(B)<5, where the first uncertainty is statistical, the second is systematic, and the third is due to the uncertainty on the Bc+ lifetime. This is the first observation of a B meson decaying to another B meson via the weak interaction.

关键词： STANDARD deviations CROSS sections (Nuclear physics) BRANCHING ratios (Nuclear physics) B mesons LUMINOSITY DECAY

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Measurement of the CP Asymmetry in B+→K+μ+μ− Decays

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Physical Review Letters 2013年第15期111卷 151801-151801页

作者： R. Aaij B. Adeva M. Adinolfi C. Adrover A. Affolder Z. Ajaltouni J. Albrecht F. Alessio M. Alexander S. Ali G. Alkhazov P. Alvarez Cartelle A. A. Alves, Jr S. Amato S. Amerio Y. Amhis L. Anderlini J. Anderson R. Andreassen J. E. Andrews R. B. Appleby O. Aquines Gutierrez F. Archilli A. Artamonov M. Artuso E. Aslanides G. Auriemma M. Baalouch S. Bachmann J. J. Back C. Baesso V. Balagura W. Baldini R. J. Barlow C. Barschel S. Barsuk W. Barter Th. Bauer A. Bay J. Beddow F. Bedeschi I. Bediaga S. Belogurov K. Belous I. Belyaev E. Ben-Haim G. Bencivenni S. Benson J. Benton A. Berezhnoy R. Bernet M.-O. Bettler M. van Beuzekom A. Bien S. Bifani T. Bird A. Bizzeti P. M. Bjørnstad T. Blake F. Blanc J. Blouw S. Blusk V. Bocci A. Bondar N. Bondar W. Bonivento S. Borghi A. Borgia T. J. V. Bowcock E. Bowen C. Bozzi T. Brambach J. van den Brand J. Bressieux D. Brett M. Britsch T. Britton N. H. Brook H. Brown I. Burducea A. Bursche G. Busetto J. Buytaert S. Cadeddu O. Callot M. Calvi M. Calvo Gomez A. Camboni P. Campana D. Campora Perez A. Carbone G. Carboni R. Cardinale A. Cardini H. Carranza-Mejia L. Carson K. Carvalho Akiba G. Casse L. Castillo Garcia M. Cattaneo Ch. Cauet R. Cenci M. Charles Ph. Charpentier P. Chen N. Chiapolini M. Chrzaszcz K. Ciba X. Cid Vidal G. Ciezarek P. E. L. Clarke M. Clemencic H. V. Cliff J. Closier C. Coca V. Coco J. Cogan E. Cogneras P. Collins A. Comerma-Montells A. Contu A. Cook M. Coombes S. Coquereau G. Corti B. Couturier G. A. Cowan E. Cowie D. C. Craik S. Cunliffe R. Currie C. D’Ambrosio P. David P. N. Y. David A. Davis I. De Bonis K. De Bruyn S. De Capua M. De Cian J. M. De Miranda L. De Paula W. De Silva P. De Simone D. Decamp M. Deckenhoff L. Del Buono N. Déléage D. Derkach O. Deschamps F. Dettori A. Di Canto H. Dijkstra M. Dogaru S. Donleavy F. Dordei A. Dosil Suárez D. Dossett A. Dovbnya F. Dupertuis P. Durante R. Dzhelyadin A. Dziurda A. Dzyuba S. Easo U. Egede V. Egorychev S. Eidelman D. van Eijk S. Eisenhardt U. Eitschberger R. Ekelhof L. Eklund I. El Rifai Ch. Elsasser A. Falabella Nikhef National Institute for Subatomic Physics Amsterdam Netherlands Universidad de Santiago de Compostela Santiago de Compostela Spain H.H. Wills Physics Laboratory University of Bristol Bristol United Kingdom CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Oliver Lodge Laboratory University of Liverpool Liverpool United Kingdom Clermont Université Université Blaise Pascal CNRS/IN2P3 LPC Clermont-Ferrand France Fakultät Physik Technische Universität Dortmund Dortmund Germany European Organization for Nuclear Research (CERN) Geneva Switzerland School of Physics and Astronomy University of Glasgow Glasgow United Kingdom Petersburg Nuclear Physics Institute (PNPI) Gatchina Russia Sezione INFN di Roma La Sapienza Roma Italy Universidade Federal do Rio de Janeiro (UFRJ) Rio de Janeiro Brazil Sezione INFN di Padova Padova Italy LAL Université Paris-Sud CNRS/IN2P3 Orsay France Sezione INFN di Firenze Firenze Italy Physik-Institut Universität Zürich Zürich Switzerland University of Cincinnati Cincinnati Ohio USA University of Maryland College Park Maryland USA School of Physics and Astronomy University of Manchester Manchester United Kingdom Max-Planck-Institut für Kernphysik (MPIK) Heidelberg Germany Laboratori Nazionali dell’INFN di Frascati Frascati Italy Institute for High Energy Physics (IHEP) Protvino Russia Syracuse University Syracuse New York USA Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany Department of Physics University of Warwick Coventry United Kingdom Institute of Theoretical and Experimental Physics (ITEP) Moscow Russia Sezione INFN di Ferrara Ferrara Italy Cavendish Laboratory University of Cambridge Cambridge United Kingdom Ecole Polytechnique Fédérale de Lausanne (EPFL) Lausanne Switzerland Sezione INFN di Pisa Pisa Italy Centro Brasileiro de Pesquisas Físicas (CBPF) Rio de Janeiro Brazil LPNHE Université Pierre et Marie Curie Université Paris Diderot CNRS/IN2P3 Paris Fr

A measurement of the CP asymmetry in B+→K+μ+μ− decays is presented using pp collision data, corresponding to an integrated luminosity of 1.0 fb−1, recorded by the LHCb experiment during 2011 at a center-of-mass en... 详细信息

关键词： CP violation (Nuclear physics) ASYMMETRY (Chemistry) RADIOACTIVE decay PROTON-proton interactions CENTER of mass PHYSICS experiments

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