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OSAMI-D: An open service platform for healthcare monitoring applications

OSAMI-D: An open service platform for healthcare monitoring ...

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Conference on Human System Interactions, HSI

作者： Myriam Lipprandt Marco Eichelberg Wolfgang Thronicke Jan Kruger Isabell Druke Detlev Willemsen Clemens Busch Christoph Fiehe Elmar Zeeb Andreas Hein Institute for Information Technology Oldenburg Germany Siemens IT Solutions and Services Paderborn Germany Department of Computer Science Technische Universitat Dortmund Germany C-LAB University of Paderborn Paderborn Germany Schüchtermann-Schillersche Kliniken Bad Rothenfelde GmbH &CompanyKG Rothenfelde Germany MATERNA GmbH Information and Communications Dortmund Germany Institute of Applied Microelectronics and Computer Engineering University of Rostock Germany

In this paper conceptions and architectural considerations of the OSAMI project and their specializations towards the requirements of the e-health domain by the German subproject (OSAMI-D) are described. Along with the expected shift of healthcare service between stationary towards ambulatory care, a standardized way of integrating medical data acquired at home into the IT infrastructure of hospitals and the synchronization with medical workflows have to be implemented. Therefore, the OSAMI-D project will provide open source components that implement the required interfaces. Preliminary results of the requirements analysis and the implementation of first domain-specific services are presented. These services are used to realize two home care scenarios, which support ambulant cardiologic rehabilitation (indoor and outdoor). Special emphasis is placed on standards and formats for the communication and storage of patient data.

关键词： Medical services Biomedical monitoring Patient monitoring Wireless sensor networks Condition monitoring Remote monitoring Protocols Service oriented architecture Intelligent sensors Hospitals

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Low cost system for detecting leakages along artificial dikes with wireless sensor networks

Low cost system for detecting leakages along artificial dike...

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3rd Workshop on Real-World Wireless Sensor Networks, REALWSN 2008

作者： Schulz, Jens Reichenbach, Frank Blumenthal, Jan Timmermann, Dirk Institute of Applied Microelectronics and Computer Engineering University of Rostock Warnemuende Germany

ISBN: (纸本)9781605581231

Recently, the number of floods has been increased world-wide enormously. Especially, the damage along flooded rivers cannot be significantly avoided with current techniques. That leads to a high demand for new approaches to detect leakages in the dike body early. Therefore, we present our work in progress on developing a "Leakage Detection System" (LDS). After this system has been installed alongside a dike, it operates autonomously and alarms the headquarter if the water level exceeds a critical threshold. This allows rescue workers to strengthen drenched regions preemptively. Real world experiments in a reconstructed dike environment demonstrate the feasibility of our system approach. Copyright 2008 ACM.

关键词： Wireless sensor networks

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Comparing the efficiency of localization algorithms with the Power-Error-Product (PEP)

Comparing the efficiency of localization algorithms with the...

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28th International Conference on Distributed Computing Systems Workshops, ICDCS Workshops 2008

作者： Reichenbach, Frank Blumenthal, Jan Timmermann, Dirk IEEE Institute of Applied Microelectronics and Computer Engineering University of Rostock Warnemuende Germany

ISBN: (纸本)9780769531731

The localization process in wireless sensor networks must produce precise positions at minimal requirements. It is hard to comply with these conditions, due to the strong resource limitation of each sensor node. Although numerous algorithms have already been presented, so far there exist neither an extensive simulative comparison of them nor a *** parameter to indicate their ***. Thus, this paper introduces a selected number of the most important algorithms for sensor networks. These algorithms are compared with each other considering achieved localization error and consumed energy. Then, we propose an adequate parameter to quantify their *** - the "Power Error Product" (PEP). © 2008 IEEE.

关键词： Sensor nodes

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Device and Service Templates for the Devices Profile for Web Services

Device and Service Templates for the Devices Profile for Web...

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6th IEEE International Conference on Industrial Informatics (IEEE INDIN 2008), vol.2

作者： Andreas Bobek Elmar Zeeb Hendrik Bohn Frank Golatowski Dirk Timmermann Institute of Applied Microelectronics and Computer Engineering University of Rostock Germany

The continual improvements in embedded devices and internet technologies increases the leverage of distributed systems in domains like home automation, industry automation, automotive and other application domains. The Devices Profile for Web Services (DPWS) is a relative new specification based on Web services that can be used as a cross domain distributed system technology. Although the specification is almost finished and software tools are on the way there are some issues left to be done for pushing DPWS in a competitive direction. DPWS still misses a description mechanism that defines interfaces to the services/devices at development time. On the other hand DPWS provides the concept of device and service types which are used for dynamic discovery without proposing a formal type description. Such mechanism improves interoperability between related devices. This paper addresses this issue and proposes a template approach similar to Universal Plug and Play (UPnP).

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AWCL: Adaptive Weighted Centroid Localization as an efficient improvement of coarse grained localization

AWCL: Adaptive Weighted Centroid Localization as an efficien...

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Workshop on Positioning, Navigation and Communication, WPNC

作者： R. Behnke D. Timmermann Institute of Applied Microelectronics and Computer Engineering University of Rostock Germany

Localization of sensor nodes is one of the key issues in wireless sensor networks. It is a precondition for a variety of scenarios as well as geographic clustering and routing. A simple approach for coarse grained localization is weighted centroid localization (WCL), which, unfortunately, comes with some drawbacks. Therefore, we present the "Adaptive WCL" (AWCL) algorithm that outperforms the linearly weighted WCL in terms of accuracy. Moreover, AWCL achieves similar accuracy as WCL using quadratic weights, but does not rely on complex calculations like quadratic WCL. The adaptive character of AWCL leads to a small localization failure for beacon communication ranges, exceeding the beacon distance.

关键词： Wireless sensor networks Navigation computer networks Routing microelectronics Clustering algorithms LAN interconnection Assembly Energy consumption Global Positioning System

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BOUNCE, a concept to measure picosecond time intervals with standard hardware

BOUNCE, a concept to measure picosecond time intervals with ...

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International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Ralf Joost Ralf Salomon Institute of Applied Microelectronics and Computer Engineering University of Rostock Rostock Germany

Tapped delay lines are chain-like structures, which are able to measure short time intervals. Due to their homogeneous structure, they are particularly suited for being implemented on field-programmable gate arrays. But unfortunately, the attainable resolution in time is inherently limited to the average processing speed of the chainpsilas elements. As an alternative, this paper proposes a new architecture, called BOUNCE, in which all processing elements run in parallel. With its inherent parallelism, BOUNCE yields a resolution that depends on the variation, i.e., the differences, among the elementspsila processing speeds. The first prototype was implemented on an ALTERA StratixII 2S60 board Even though this board is clocked at only 85 MHz, the prototype yields a resolution of about 100ps.

关键词： Delay lines Wire Delay Field programmable gate arrays Clocks Pins Time measurement

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Comparison of FPGA-based implementation alternatives for complex algorithms in networked embedded systems - the encryption example

Comparison of FPGA-based implementation alternatives for com...

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International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Enrico Heinrich Sebastian Staamann Ralf Joost Ralf Salomon Institute of Applied Microelectronics and Computer Engineering University of Rostock Rostock Germany

Field-programmable gate arrays provide a flexible and easy-to-configure implementation platform that supports the development of tamper-proof networked embedded systems. Many of these systems employ the Advanced Encryption Standard algorithm in order to achieve a secure mode of operation. Since this algorithm is of a high computational complexity, this paper utilizes various hardware-software co-design techniques for its implementation. These techniques vary in the degree of required design expertise, the degree of how (software) functionalities are implemented in hardware logic, and the achievable speedup, which is about 12 to approximately four thousand.

关键词： Hardware Field programmable gate arrays Cryptography Software Security Fires Logic gates

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Distributed selection of references for localization in wireless sensor networks

Distributed selection of references for localization in wire...

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Workshop on Positioning, Navigation and Communication, WPNC

作者： Dominik Lieckfeldt Jiaxi You Dirk Timmermann Institute of Applied Microelectronics and Computer Engineering University of Rostock Rostock Germany

The main purpose of wireless sensor networks is to provide information about an area of interest. In order to fulfill this task, physical parameters have to be measured by as many sensors as possible to improve the knowledge on the sensed area. In contrast, due to the resource-limited nature of sensor networks, the number of actively participating nodes should be kept to a minimum. This paper investigates the trade-off between the two conflicting requirements with special focus on localization of sensor nodes. A distributed algorithm to select subsets of sensor nodes for localization is analyzed regarding the accuracy of localization.

关键词： Wireless sensor networks Distributed algorithms Energy consumption Broadcasting Navigation Area measurement Algorithm design and analysis Weight measurement Testing Computational modeling

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Evaluation of dynamic bandwidth allocation algorithms for G-PON systems using a reconfigurable hardware testbed

Evaluation of dynamic bandwidth allocation algorithms for G-...

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IEEE Workshop on Local and Metropolitan Area Networks (LANMAN)

作者： Harald Widiger Andy Strzeletz Dirk Timmermann Institute of Applied Microelectronics and Computer Engineering University of Rostock Rostock Germany

The capabilities of passive optical networks (PONs) are strongly influenced by the quality of the used dynamic bandwidth allocation (DBA) algorithm. DBA algorithms control the assignment of available upstream bandwidth to the users connected to the PON. In an oversubscribed environment, that poses a challenge regarding the selection of an appropriate DBA algorithm. Therefore, DBA algorithms are subject of continuous research. To support efficient development and realistic evaluation of DBA algorithms, an FPGA-based hardware evaluation platform is presented. It supports fast implementation and evaluation of both hardware- and software-based algorithms. The evaluation process is featured by software tools, which are used to control stimulus creation. Furthermore, the results of changes in simulated user traffic can be analyzed on a connected workstation.

关键词： Channel allocation Heuristic algorithms Hardware System testing Passive optical networks Bandwidth Software tools Analytical models Traffic control Workstations

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Comparing the Efficiency of Localization Algorithms with the Power-Error-Product (PEP)

Comparing the Efficiency of Localization Algorithms with the...

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International Conference on Distributed Computing Systems Workshop

作者： Frank Reichenbach Jan Blumenthal Dirk Timmermann Institute of Applied Microelectronics and Computer Engineering University of Rostock Warnemunde Germany

ISBN: (纸本)9781424431755

The localization process in wireless sensor networks must produce precise positions at minimal requirements. It is hard to comply with these conditions, due to the strong resource limitation of each sensor node. Although numerous algorithms have already been presented, so far there exist neither an extensive simulative comparison of them nor a qualified parameter to indicate their efficiency. Thus, this paper introduces a selected number of the most important algorithms for sensor networks. These algorithms are compared with each other considering achieved localization error and consumed energy. Then, we propose an adequate parameter to quantify their efficiency - the "Power Error Product" (PEP).

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