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International Conference on Information Fusion

作者： Michael Morin Irene Abi-Zeid Pascal Lang Luc Lamontagne Patrick Maupin Department of Computer Science and Software Engineering Universite Laval Department of Operations and Decision Systems Universite Laval Defence Research and Development Canada

ISBN: (纸本)9780982443804

In this paper, the problem of path planning for a ground search unit looking for an object of unknown location is considered. As in the classical optimal searcher path problem, the probability of finding the search object is the main criterion of optimality and the search unit is constrained by the environment topology that influences its choices for a navigable path as well as its detection capabilities. This paper proposes an extension to the classical optimal searcher path problem in discrete time and space by integrating inter-region visibility as an additional criterion. This new formulation allows a refinement in the discretization of the space in which a ground search unit evolves. A general mixed-integer programming model is proposed, and experimental results with a moving object in grid environments are discussed.

关键词： Optimal searcher path problem Visibility Path planning Search theory Mixed integer programming

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Newborn screening system based on adaptive feature selection and support vector machines

Newborn screening system based on adaptive feature selection...

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2009 9th IEEE International Conference on Bioinformatics and Bioengineering, BIBE 2009

作者： Hsieh, Sung-Huai Chien, Yin-Hsiu Shen, Chia-Ping Chen, Wei-Hsin Chen, Po-Hao Hsieh, Sheau-Ling Cheng, Po-Hsun Lai, Feipei Information Systems Office National Taiwan University Hospital Taipei Taiwan Department of Computer Science and Information Engineering National Taiwan University Taiwan Department of Electrical Engineering National Taiwan University Taipei Taiwan Network and Computer Centre National Chiao Tung University Hsin Chu Taiwan Graduate Institute of Biomedical Electronics and Bioinformatics National Taiwan University Taiwan Department of Software Engineering National Kaohsiung Normal University Taiwan Department of Medical Genetics National Taiwan University Hospital Taiwan

ISBN: (纸本)9780769536569

The clinical symptoms of metabolic disorders during neonatal period are often not apparent, if not treated early irreversible damages such as mental retardation may occur, even death. Therefore, practicing newborn screening is very important to prevent neonatal from these damages. In this paper, the newborn screening system used support vector machines (SVM) classification technique is proposed in place of cut-off value decision to evaluate the metabolic substances concentration raw data obtained from tandem mass spectrometry (MS/MS) and determine whether the newborn has some kinds of metabolic disorder diseases. On the basis of the proposed features, new analytic combinations are identified with superior discriminatory performance compared with the best published combinations. Classifiers built with the feature selection to find C3/C2, C3 and C16 of three key point features achieved diagnostic sensitivities, specificities and accuracy approaching 100%. © 2009 IEEE.

关键词： Support vector machines

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Three-layer architecture model (TLAM) for energy conservation in wireless sensor networks

Three-layer architecture model (TLAM) for energy conservatio...

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International Conference on Ultra Modern Telecommunications and Workshops (ICUMT)

作者： Sugam Sharma Mamta Rani Department of Computer Science Iowa State University Ames IA USA Faculty of Computer Systems & Software Engineering Universiti Malaysia Pahang Kuantan Malaysia

We propose a three-layer architecture model (TLAM) for wireless sensor networks. The first layer (bottom layer) consists of a network of resource-constrained sensor nodes deployed in the field. The second layer contains a set of resource-rich dynamic sink nodes forming an ad hoc network. The sinks at layer second are responsible to monitor and collect data from a region, called cluster. So the sinks at second layer are also knows as cluster sinks. At the third layer, there is a resource-rich static sink, known as zonal sink also, responsible for data collection from cluster sinks. A cluster sink may be few hops away from a static sensor node and moves to the vicinity of sensor nodes to collect the data. Each cluster sink continuously updates the zonal sink by propagating the collected data from the respective cluster. The zonal sink buffers the collected data and propagates to base station. Zonal sink is the one, responsible for data transmission from network environment to the base station, where the data is processed for further use. TLAM approach is robust, increases sensor life by allowing them to operate with a limited transmission range only and provides reduced delay as cluster sink continuously updates to zonal sink without query.

关键词： Energy conservation Wireless sensor networks Peer to peer computing Intelligent sensors Monitoring Base stations computer architecture Robustness Sensor systems Batteries

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Exploration of Slot Allocation for On-Chip TDM Virtual Circuits

Exploration of Slot Allocation for On-Chip TDM Virtual Circu...

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Euromicro Symposium on Digital System Design

作者： Li Tong Zhonghai Lu Hua Zhang School of Computer and Communication Engineering Tianjin University of Technology Tianjin China Department of Electronic Computer and Software Systems Royal Institute of Technology Stockholm Sweden

Time-Division-Multiplexing (TDM) Virtual Circuit (VC) has been proposed to guarantee the Quality-of-Service requirements in communication for Network-on-Chip. In this paper, we explore the design space of slot allocation for configuring TDM VCs. Specifically, we investigate different slot assignment schemes, namely, distributed, random and consecutive schemes, which have significant impact on the configurability. We also propose to construct disjoint connected VC sets to effectively reduce the search space. We have realized and integrated them into our VC configuration flow. Our experimental results suggest that the optimal slot allocation cycle equals to the ratio of the link bandwidth to the maximal VC bandwidth, and the distributed slot assignment scheme performs better than the random and consecutive schemes.

关键词： Time division multiplexing Circuits Virtual colonoscopy Switches Network-on-a-chip Bandwidth Routing computer networks System-on-a-chip Packet switching

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A utility model for peering of multi-provider content delivery services

A utility model for peering of multi-provider content delive...

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Conference on Local computer Networks (LCN)

作者： Mukaddim Pathan Rajkumar Buyya Grid Computing and Distributed Systems GRIDS Laboratory Department of Computer Science and Software Engineering University of Melbourne Parkville VIC Australia

Peering of Content Delivery Networks (CDNs) allow providers to rapidly scale-out to meet both flash crowds and anticipated increases in demand. Recent trends foster the need for a utility model for content delivery services to provide transparency, high availability, reduced investment cost, and improved content delivery performance. Analysis of prior work reveals only a modest progress in evaluating the utility for peering CDNs. In this paper, we introduce a utility model and measure the content-serving ability of the peering CDNs system. Our model assists in providing a customer view of the system's health for different traffic types. Our model also captures the traffic activities in the system and helps to reveal the true propensities of participating CDNs to cooperate in peering. Through extensive simulations we unveil many interesting observations on how the utility of the peering CDNs system is varied for different system parameters and provide incentives for their exploitation in the system design.

关键词： Costs Traffic control Investments Web server computer networks Grid computing Laboratories computer science software engineering Availability

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Energy Efficient Data Dissemination with ATIM Window and Dynamic Sink in Wireless Sensor Networks

Energy Efficient Data Dissemination with ATIM Window and Dyn...

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International Conference on Advances in Recent Technologies in Communication and Computing, ARTCom

作者： Sugam Sharma Mamta Rani S.B. Goyal Department of Computer Science Iowa State University USA Department of Computer Science Manav Rachna International University India Faculty of Computer Systems & Software Engineering Universiti Malaysia Pahang Malaysia

We illustrate the effective use of ATIM (ad hoc traffic indication message) window in static sensors to obtain potential energy savings for sensors during data dissemination in wireless sensor networks. The network consists of resource-rich mobile sink node and resource-constrained sensor nodes forming a square grid. Sink may be multihop away from the sensor nodes and in order to collect the data, it moves to the vicinity of the sensor nodes in the grid. Each sensor node in the grid uses an ATIM window and sleeps during that time to conserve energy. The sleeping sensor node wakes up at regular interval of time to read the beacon messages. If the message comes from sink, sensor node immediately reads the header part of query packet to check whether it is the targeted sensor. The targeted sensor further reads the remaining part of query packet and responds back to the sink with requested data. The rest of the sensor nodes just ignore the remaining part of the query packet and go to sleep mode. If the message comes from the peer sensor node, the neighbor nodes just ignore it. We consider an affordable wireless network system with four sensor nodes and one mobile sink. Mobile sink transfers the collected data directly to the control station.

关键词： Energy efficiency Wireless sensor networks Peer to peer computing Sensor systems Intelligent sensors computer networks computer science Energy consumption Batteries Temperature sensors

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Constructing a new communication system by integrating the GSM to the satellites infrastructure

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WSEAS Transactions on Communications 2009年第2期8卷 217-226页

作者： Al-Ani, Muzhir Sh. Al-Kasasbeh, Basil M. Al-Qutaish, Rafa E. Muhairat, Mohammad I. Department of Computer Science Amman Arab University Amman 11953 Jordan Department of Computer Networks Systems Applied Science University Amman 11931 Jordan Department of Software Engineering Alzaytoonah University of Jordan Amman 11733 Jordan

The current researches and industries are looking forward to integrate different technologies to get a global technology that offers all of the intended services in a simple way. In this paper, a new communications system is proposed to integrate the use of GSM over the available satellites infrastructures. The proposed communications system could be used to facilitates and get benefits of both systems (the GSM and Satellites) to achieve competitive services over the world. The proposed system is concentrated on a global communications system that served all over the world and gives some specialization and privacy for each country. Furthermore, this paper shows an algorithm on how to implement the GSM over satellite systems in an efficient, flexible, and cost-effective manner.

关键词： Cost effectiveness

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Minimal exposure path algorithms for directional sensor networks

Minimal exposure path algorithms for directional sensor netw...

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2009 IEEE Global Telecommunications Conference, GLOBECOM 2009

作者： Liu, Liang Zhang, Xi Ma, Huadong Networking and Information Systems Laboratory Department of Electrical and Computer Engineering Texas A and M University College Station TX 77843 United States Beijing Key Lab. of Intelligent Telecomm. Software and Multimedia Beijing University of Posts and Telecomm. Beijing 100876 China

ISBN: (纸本)9781424441488

As a fundamental problem of wireless sensor networks, the minimal exposure path problem corresponding to the sensor network's worst-case coverage plays an important role in the applications for detecting intrusions. However, most existing works about minimal exposure path are based on omnidirectional sensors. In contrast, this paper studies the minimal exposure path problem for directional sensor networks. We first develop a directional sensing model: directional sensitivity model. Then, we formulate the minimal exposure path problem by using two sensing intensity functions: all-sensor intensity function and maximum-sensor intensity function, and generate two weighted grids to convert the minimal exposure path problem into two discrete geometric problems. Based on the above weighted grids, we also develop two approximation algorithms to find the minimal exposure path for the directional sensitive model. We conduct extensive simulations to validate and evaluate our proposed models and algorithms.

关键词： Wireless sensor networks

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Threats to Health Information Security

Threats to Health Information Security

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The Fifth International Conference on Information Assurance and Security(第五届信息保障与安全国际会议)

作者： Ganthan Narayana Samy Rabiah Ahmad Zuraini Ismail Department of Computer Systems and Communications Faculty of Computer Science and Information System Centre for Advanced Software Engineering (CASE) Faculty of Computer Science and Information Systems Department of Science College of Science and Technology Universiti Teknologi Malaysia (UTM) Malaysia

ISBN: (纸本)9781424451012

The purpose of this paper is to identify the threats that exist in Healthcare Information systems (HIS). The study has been carried out in three different departments namely, Information Technology department (ITD), Medical Record department (MRD) and X-Ray department in one of the leading government supported hospital in Malaysia. The hospital was equipped with Total Hospital Information System (THIS) environment. The data were collected using in-depth structured interviews. The study identified 22 types of threats according to major threat categories based on ISO/IEC 27002 (ISO 27799:2008). The result shows the most critical threat for the THIS is the power failure. In addition, acts of human error or failure threat also show high frequency of occurrence. The contribution of the paper will be categorization of threats in HIS and can be used to design and implement effective security systems and policies in healthcare setting.

关键词： Threats Healthcare Information systems (HIS) Information Security Risk Analysis

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Exposure-path prevention in directional sensor networks using sector model based percolation

Exposure-path prevention in directional sensor networks usin...

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2009 IEEE International Conference on Communications, ICC 2009

作者： Liang, Liu Xi, Zhang Huadong, Ma Networking and Information Systems Laboratory Department of Electrical and Computer Engineering Texas A and M University College Station TX 77843 United States Beijing Key Lab. of Intelligent Telecomm. Software and Multimedia Beijing University of Posts and Telecomm. Beijing 100876 China

ISBN: (纸本)9781424434350

In wireless sensor networks, most existing works on region coverage mainly concentrate on the omnidirectional sensor based full coverage, which ensures that all points in the sensor-deployed region are covered. In contrast, this paper studies the problem of exposure-path prevention for the region coverage in directional sensor networks. Because the exposure paths are prevented as long as no moving objects or phenomena can go through a sensor-deployed region without being detected, exposure-path prevention does not require full coverage, and instead it only needs the partial coverage. Towards this end, we apply the percolation theory to solve the exposure path problem for directional sensor networks. In particular, we map the exposure path problem into a sector based percolation model, and then derive the bounds of critical density where directional sensors are deployed according to a 2-dimensional Poisson process. Also conducted is a set of extensive simulations to validate and evaluate our developed models and schemes. ©2009 IEEE.

关键词： Wireless sensor networks

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