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2010 3rd International Conference on Human-Centric Computing, HumanCom 2010

作者： Manguni Jr., Reynaldo Navarro, Mel Leandro Rosario, Kathleen Festin, Cedric Angelo Department of Computer Science Networks and Distributed Systems Group University of Philippines Diliman Quezon City Philippines

ISBN: (纸本)9781424475704

Community Health Information Tracking System using Short Message Service (chitSMS) is an extension of CHITS which is a system that stores health records of patients in the barangay. Another project incorporated a mobile component in CHITS, enabling the health worker to visit the patient, do routine check-ups and medical services, and update CHITS when the health worker returns to the health center. Without a remote connection, however, the health worker has to return frequently to the usually distant health center to update the CHITS database with the data gathered from the field consult. chitSMS addresses this by using SMS as a mode of remote data transfer. It ensures the reliable transmission of the data by implementing a modified selective repeat protocol. Furthermore, it performs the Deflate algorithm for compression of the data being sent to minimize the cost. © 2010 IEEE.

关键词： Data transfer

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Flexible resource management for Self-X systems: An evaluation

Flexible resource management for Self-X systems: An evaluati...

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2010 13th IEEE International Symposium on Object/Component/Service-Oriented Real-Time distributed Computing Workshops, ISORC Workshops 2010

作者： Oberthür, Simon Zaremba, Leszek Lichte, Hermann Simon Department of Design of Distributed Embedded Systems Heinz Nixdorf Institute University of Paderborn Paderborn Germany Computer Networks Group University of Paderborn Paderborn Germany

ISBN: (纸本)9780769540382

In classical real-time systems the resources for an application are allocated at system start so that every resource request can be fulfilled in future. This would lead to much internal waste of resources in the case of modern Self-X systems, because these systems have highly dynamic resource consumptions. The Flexible Resource Manager (FRM) was developed to overcome this problem. The manager puts temporarily unused resources at other applications' disposal. In this paper the FRM approach is evaluated by concrete application examples and randomly generated applications. © 2010 IEEE.

关键词： Real time systems

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chitSMS: Community Health Information Tracking System Using Short Message Service

chitSMS: Community Health Information Tracking System Using ...

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International Conference on Human-Centric Computing (HumanCom)

作者： Reynaldo Manguni Jr. Mel Leandro Navarro Kathleen Rosario Cedric Angelo Festin Networks and Distributed Systems Group Department of Computer Science University of Philippines Quezon Philippines

关键词： Databases Protocols Servers Mobile communication Java Receivers Synchronization

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Peer-to-peer solutions for cellular networks

Peer-to-peer solutions for cellular networks

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1st International Conference on Advances in P2P systems, AP2PS 2009

作者： Berl, Andreas De Meer, Hermann Hoßfeld, Tobias Deparment of Computer Networks and Communications University of Passau Germany Department of Distributed Systems University of Würzburg Germany

ISBN: (纸本)9780769538310

The participation of stationary computers with highbandwidth links in peer-to-peer content-distribution networks is highly popular. Mobile devices (e.g. cell phones), however, could not yet be launched into the field to a satisfactory extent. This paper discusses mobile peer-to-peer approaches that cover this issue and compares two promising approaches in detail. The first approach supports mobile devices by adding new infrastructure elements to the mobile network operator's domain. In the second approach, voluntary peers provide support for mobile devices. Both approaches are able to foster the integration of mobile devices into peer-to-peer networks with a large user community. © 2009 IEEE.

关键词： Peer to peer networks

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Self-Organizing systems: 4th IFIP TC 6 InternationalWorkshop, IWSOS 2009 Zurich, Switzerland, December 9-11, 2009 Proceedings 4

Self-Organizing Systems: 4th IFIP TC 6 InternationalWorkshop...

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4th International Workshop on Self-Organizing systems, IWSOS 2009

作者： Spyropoulos, Thrasyvoulos Hummel, Karin Anna ETH Zürich Computer Engineering and Networks Laboratory ETZ G 96 Gloriastr. 35 Zürich Switzerland University of Vienna Department of Distributed and Multimedia Systems Lenaugasse 2/8 Vienna Austria

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Peer-to-Peer Solutions for Cellular networks

Peer-to-Peer Solutions for Cellular Networks

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International Conference on Advances in P2P systems (AP2PS)

作者： Andreas Berl Hermann de Meer Tobias Hoßfeld Computer Networks and Communications University of Passau Germany Department of Distributed Systems University of Wiirzburg Germany

The participation of stationary computers with high-bandwidth links in peer-to-peer content-distribution networks is highly popular. Mobile devices (e.g. cell phones), however, could not yet be launched into the field to a satisfactory extent. This paper discusses mobile peer-to-peer approaches that cover this issue and compares two promising approaches in detail. The first approach supports mobile devices by adding new infrastructure elements to the mobile network operator's domain. In the second approach, voluntary peers provide support for mobile devices. Both approaches are able to foster the integration of mobile devices into peer-to-peer networks with a large user community.

关键词： Peer to peer computing Land mobile radio cellular systems Protocols computer networks Hardware Batteries Mobile communication distributed computing Cellular phones Application software

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Spanning tree routing strategies for divisible load scheduling on arbitrary graphs — A comparative performance analysis

Spanning tree routing strategies for divisible load scheduli...

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International Conference on High Performance Computing

作者： Sivakumar Viswanathan Bharadwaj Veeravalli Jia Jingxi Communication Systems Department Institute for Infocomm Research Singapore Computer Networks and Distributed Systems (CNDS) Laboratory Department of Electrical and Computer Engineering National University of Singapore Singapore

ISBN: (纸本)9781424449224;9781424449217

In this paper, we evaluate and compare the performance of several spanning tree routing strategies for divisible load scheduling on arbitrary graphs and derive recommendations as to which routing strategy provides a better trade-off between complexity and time performance. We consider a network comprising heterogeneous processors interconnected by heterogeneous links in an arbitrary manner. We evaluate the performance over a wide range of arbitrary dense graphs with varying connectivity and processor densities and study the effect of network scalability. In addition, we introduce a novel spanning tree routing strategy, which is referred to as minimum equivalent network spanning tree (EST), and analyze its performance. We apply the resource-aware optimal load distribution with optimal sequencing (RAOLD-OS) scheduling algorithm presented in the literature for obtaining an optimal solution. This study attempts to pool all known and applicable divisible load scheduling algorithms for arbitrary networks and presents a collective and comparative view of their performance.

关键词： Tree graphs Routing Performance analysis Processor scheduling computer networks Large-scale systems Scheduling algorithm Biology computing Distribution strategy Databases

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics): Preface

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2009年 5918 LNCS卷 V-VI页

作者： Spyropoulos, Thrasyvoulos Hummel, Karin Anna ETH Zürich Computer Engineering and Networks Laboratory ETZ G 96 Gloriastr. 35 8092 Zürich Switzerland University of Vienna Department of Distributed and Multimedia Systems Lenaugasse 2/8 1080 Vienna Austria

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An energy-balanced task scheduling heuristic for heterogeneous wireless sensor networks 08

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Proceedings of the 15th international conference on High performance computing

作者： Lee Kee Goh Bharadwaj Veeravalli Computer Networks and Distributed Systems Laboratory Department of Electrical and Computer Engineering National University of Singapore Singapore

ISBN: (纸本)9783540898931

In this paper, we propose a static scheduling algorithm forassigning tasks with precedence constraints onto a cluster of heterogeneoussensor nodes connected by a single-hop wireless network so as tomaximize the lifetime of the sensor network. The processing element oneach sensor node is equipped with dynamic voltage scaling capability. Inour algorithm, we assign the tasks to the sensor nodes so as to minimizethe energy consumption of the tasks on each sensor node while keepingthe energy consumption as balanced as possible. We also propose an algorithmto generate a second schedule that can improve the lifetime ofthe network further when it is used together with the original *** observe up to 311% lifetime improvement in our simulations whenour algorithms are compared to the baseline case where dynamic voltagescaling is not used.

关键词： dynamic voltage scaling energy-aware scheduling heterogeneous multiprocessor scheduling power management wireless sensor network

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Dynamic scheduling of imprecise-computation tasks in maximizing QoS under energy constraints for embedded systems

Dynamic scheduling of imprecise-computation tasks in maximiz...

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Asia and South Pacific Design Automation Conference

作者： Heng Yu Bharadwaj Veeravalli Yajun Ha Department of Electrical and Computer Engineering National University of Singapore Singapore Computer Networks and Distributed Systems (CNDS) Laboratory National University of Singapore Singapore

ISBN: (纸本)9781424419210

In designing energy-aware CPU scheduling algorithms for real-time embedded systems, dynamic slack reclamation techniques significantly improve system quality-of-service (QoS) and energy efficiency. However, the limited schemes in this domain either demand high complexity or can only achieve limited QoS. In this paper, we present a novel low complexity runtime scheduling algorithm for the imprecise computation (IC) modeled tasks. The target is to maximize system QoS under energy constraints. Our proposed algorithm, named gradient curve shifting (GCS), is able to decide the best allocation of slack cycles arising at runtime, with very low complexity. We study both linear and concave QoS functions associated with IC modelde tasks, on non-DVS and DVS processors. Furthermore, we apply the intra-task DVS technique to tasks and achieve as large as 18% more of the system QoS compared to the conventional "optimal" solution which is inter-task DVS based.

关键词： Dynamic scheduling Embedded system Integrated circuit modeling Voltage control Scheduling algorithm Runtime Algorithm design and analysis Real time systems Quality of service Energy efficiency

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