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International International Symposium on computer and Information Sciences (ISCIS)

作者： Adriana Dobriceanu Laurentiu Biscu Amelia Badica Costin Badica Software Engineering Department University of Craiova Craiova Romania Business Information Systems Dept. University of Craiova Craiova Romania

In this paper we discuss experimental results obtained with a prototype implementation of an agent-based service for generic auctions that is currently under development. We configured the service to allow parallel execution of multiple English auctions with buyer and seller agents bidding from different machines. The experimental results to assess the performance of the service include latency and throughput of the service as functions of the number of participants and the number of simultaneously active auctions.

关键词： software engineering Consumer electronics Engines software agents Information systems software prototyping Delay Throughput Business communication Internet

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Parallel implementation of skeleton-based pedestrian tracking on a Cell Broadband Engine processor

Parallel implementation of skeleton-based pedestrian trackin...

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8th IASTED International Conference on Visualization, Imaging, and Image Processing, VIIP 2008

作者： Sugano, Hiroki Nakamura, Yukihiro Shinoda, Tomonori Miyamoto, Ryusuke Dept. of Communications and Computer Engineering Kyoto University Yoshida-hon-machi Sakyo Kyoto 606-8501 Japan Research Organization of Science and Engineering Ritsumeikan University 1-1-1 Noji-Higashi Kusatsu Shiga 525-8577 Japan Dept. of Information Systems Nara Institute of Science and Technology 8916-5 Takayama-cho Ikoma Nara Japan

ISBN: (纸本)9780889867598

Currently we must realize a pedestrian recognition system based on image processing for embedded applications, such as automotive applications, surveillance, and robotics. In these applications, highly accurate recognition must be achieved with real-time processing under limited system resources. To achieve such a pedestrian recognition system, we implement a skeleton-based pedestrian tracking scheme which can track pedestrians accurately on Cell Broadband Engine (CBE), one of the latest high performance embedded processors for general purpose use, which has a novel memory management system to achieve efficient computation with parallel execution units. Experimental results using a test sequence show that processing time is reduced drastically when the number of SPE used for computation increases.

关键词： Image processing

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A method for minimizing unnecessary handovers in heterogeneous wireless networks

A method for minimizing unnecessary handovers in heterogeneo...

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IEEE International Symposium on World of Wireless Mobile and Multimedia Networks (WoWMoM)

作者： Xiaohuan Yan Y. Ahmet Sekercioglu Nallasamy Mani Dept. of Electrical and Computer Systems Engineering Monash University Australia Monash University Clayton VIC AU

In near future, various wireless access technologies will be used together to provide seamless and cost effective connectivity to mobile users. Multiple wireless access systems with overlapping coverage fields will be accessible to a mobile terminal with multiple interfaces. One problem arising from the availability of alternatives is the unnecessary occurrences of handovers (especially vertical ones) that lead to excessive resource consumption. To avoid this, a suite of algorithms need to be deployed to limit the number of handovers. In this paper, we present an algorithm which is run in the mobile terminal and minimizes the number of handovers when the device detects the presence of wireless local area network (WLAN) signals. Conventionally, a mobile terminal should switch from cellular to WLAN whenever WLAN connectivity is available, to make use of the WLAN's high speed and low cost as much as possible. However, a considerable proportion of these handovers will be detrimental to the call quality due to potential failures. Our algorithm reduces the number of handovers whenever the predicted traveling distance inside the WLAN cell is smaller than a threshold value. Through performance analysis we show that our algorithm successfully minimizes the probability of unnecessary handovers, and through simulation we discuss about the accuracy of the distance prediction based on the received signal strength measurements.

关键词： Wireless LAN Distance measurement Wireless communication Estimation Land mobile radio cellular systems computer architecture Trajectory

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A graphics-user interface in support of a cognitive inference architecture

A graphics-user interface in support of a cognitive inferenc...

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21st International Conference on computer Applications in Industry and engineering, CAINE 2008

作者： Lombera, Isaí Michel Patel, Jayeshkumar Rubin, Stuart Chen, Shu-Ching Lee, Gordon Dept. of Electrical And Computer Engineering San Diego State University 5500 Campanile Drive San Diego CA 92182 United States Dept. of Computer Science San Diego State University 5500 Campanile Drive San Diego CA 92182 United States SPAWAR Systems Center 53560 Hull Street San Diego CA 92152 United States Dept. of Computing and Information Sciences Florida International University Miami FL 33199 United States

ISBN: (纸本)9781605606170

The objective of this paper is to present a graphical-user-interface (GUI) in support of a decision support system (KASER) for machine understanding. In order to provide information between the user and the KASER during the learning process, the approach is to combine information science and cognitive science in the form of several virtual and physical multimedia screens (e.g., a whiteboard running a pen-based OS ensemble, a menu-driven touch-screen, or a multimedia output screen). The touch-screen will also facilitate navigation between virtual screens. An application to homeland security is provided as an example;however the approach has vast applicability to many problems in which a graphical form of learning is required. The integration between human and machine is to be seamless which allows the user to pose questions and retrieve answers through the multimedia system, thus accelerating the learning process.

关键词： Multimedia systems

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Proposition of a Method for the Development and Deployment of e-Government systems that Emphasize Good Governance

Proposition of a Method for the Development and Deployment o...

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2008 International MCETECH Conference on e-Technologies (MCETECH 2008)

作者： Driss Kettani Bernard Moulin Asmae El Mahdi School of Science and Engineering Al Akhawayn University Ifrane MOROCCO Computer Science and Software Engineering Dept. Laval University Québec CANADA

Although it is commonly agreed that e-Government systems enhance governance, there is a lack of empirical evidence to build upon this hypothesis which, legitimately, creates reluctance among key decision makers to adopt e-Government, especially in local governmental agencies in developing countries, In the context of the e-Fez Project and in a close collaboration with the municipality of the Moroccan city of Fez, we developed a pilot e-Government system that facilitates citizens' access to governmental information and services. In the course of the e-Fez Project and other similar projects, we set up a methodology that emphasizes good governance at each step of an e-Government project and enables us to continuously assess the outcomes of the resulting e-Gov systems on governance. The ultimate goal is to reduce the reluctance of decision makers and to contribute in the dissemination of e-technology in developing countries through a scientific and proven methodology that systematically links eGovernment outcomes to good governance attributes.

关键词： Electronic government Cities and towns Appropriate technology Usability Personnel Portals computer science software engineering Context-aware services Collaborative software

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Finite-Time Input-to-State Stability and Applications to Finite-Time Control

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IFAC Proceedings Volumes 2008年第2期41卷 2466-2471页

作者： Yiguang Hong Zhong-Ping Jiang Gang Feng Institute of Systems Science Chinese Academy of Sciences Beijing 100080 China Dept. of Electrical and Computer Engineering Polytechnic University Brooklyn New York 11201 USA Dept. of Manufacturing Engineering and Engineering Management City University of Hong Kong Hong Kong China

This paper extends the well-known concept, input-to-state stability (ISS), to finite-time control problems. In other words, a new concept, finite-time input-to-state stability (FTISS), along with related concepts such as finite-time input-output stability and finite-time small-gain theorems, is discussed, and then is applied to both the finite-time stability analysis and the finite-time stabilizing feedback design. With finite-time convergence, non-smoothness has to be considered, which poses serious technical challenges in the analysis and synthesis of closed-loop finite-time systems. It is found that FTISS plays a key role in the study of finite-time stability and stabilization of nonlinear systems.

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A Cloaking Algorithm Based on Spatial Networks for Location Privacy

A Cloaking Algorithm Based on Spatial Networks for Location ...

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IEEE International Conference on Sensor Networks, Ubiquitous, and Trustworthy Computing

作者： Po-Yi Li Wen-Chih Peng Tsung-Wei Wang Wei-Shinn Ku Jianliang Xu J. A. Hamilton Jr. Dept.of Computer Science National Chiao Tung University Taiwan Dept. of Computer Science and Software Engineering Auburn University Auburn USA Dept. of Computer Science Hong Kong Baptist University Hong Kong Hong Kong China

ISBN: (纸本)9780769531588;9780769534114

Most of research efforts have elaborated on k-anonymity for location privacy. The general architecture for implementing k-anonymity is that there is one trusted server (referred to as location anonymizer) responsible for cloaking at least k users' locations for protecting location privacy. A location anonymizer will generate cloaked regions in which there are at least k users for query processing. Prior works only explore grid shape cloaked regions. However, grid shape cloaked regions result in a considerable amount of query results, thereby increasing the overhead of filtering unwanted query results. In this paper, we propose a cloaking algorithm in which cloaked regions are generated acording to the features of spatial networks. By exploring the features of spatial networks, the cloaked regions are very efficient for reducing query results and improving cache utilization of mobile devices. Furthermore, an index structure for spatial networks is built and in light of the proposed index structure, we develop a Spatial-Temporal Connective Cloaking algorithm(abbreviated as STCC). A simulator is implemented and extensive experiments are conducted. Experimental results show that our proposed algorithm out-performs prior cloaking algorithms in terms of the candidate query results and the cache utilization.

关键词： Privacy Roads computer science Protection Shape Mobile computing computer networks Pervasive computing software algorithms software engineering

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Flip-chip integrated soi-cmos-mems fabrication technology

Flip-chip integrated soi-cmos-mems fabrication technology

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2008 Solid-State Sensors, Actuators, and Microsystems Workshop

作者： Gilgunn, P.J. Fedder, G.K. Electrical and Computer Engineering Dept. Carnegie Mellon University PittsburghPA United States The Institute for Complex Engineered Systems Carnegie Mellon University PittsburghPA United States The Robotics Institute Carnegie Mellon University PittsburghPA United States

ISBN: (纸本)0964002477

A fully-dry, flip-chip fabrication technology was developed for the integration of high fill factor, silicon-on-insulator (SOI) structures and CMOS-MEMS actuators. An SOI mirror array with a fill factor of 95% and radius of curvature >1.3 m was fabricated on CMOS-MEMS electrothermal actuators using this technology. The unloaded actuators achieved an optical scan range of >92º. Following flip-chip bonding with high temperature epoxy, the structures were released using deep reactive ion etching (DRIE). Aspect ratio dependent etching (ARDE) modulated local structural silicon thickness on the CMOS-MEMS actuators and reduced notching and microtrenching on the posts of the SOI mirrors. © 2008 TRF.

关键词： Aspect ratio

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Pseudo phase plane, delay and fractional dynamics

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Journal Europeen des Systemes Automatises 2008年第6-8期42卷 1037-1051页

作者： Lima, Miguel Francisco Martins Machado, José Antonio Tenreiro Crisóstomo, Manuel Marques Dept. of Electrical Engineering Superior School of Technology Polytechnic Institute of Viseu 3504-510 Viseu Portugal Dept. of Electrical Engineering Institute of Engineering Polytechnic Institute of Porto 4200-072 Porto Portugal Institute of Systems and Robotics Dept. of Electrical and Computer Engineering University of Coimbra Polo II 3030-290 Coimbra Portugal

This paper analyses the relationship between the signal delay and the fractional dynamics. It is shown that some experimental signals spectra are approximated by trendlines. Based on the slope of these trendlines the fractional or integer order behavior is determined. For the pseudo phase plane reconstruction of each signal, the time delays are calculated through the fractal dimension, as an alternative to the mutual information that is often used. The slopes of the trendlines spectra reveal a relationship with the fractal dimension of the pseudo phase plane and the corresponding time lag. © 2008 Lavoisier, Paris.

关键词： Fractal dimension

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Application of image processing to measure road distresses

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WSEAS Transactions on Information Science and Applications 2008年第1期5卷 1-7页

作者： Rajab, Maher I. Alawi, Mohammad H. Saif, Mohammed A. Computer Engineering Dept. College of Computer and Information Systems University of Umm Al-Qura P.O. Box 5555 Makkah Saudi Arabia Civil Engineering Dept. College of Engineering and Islamic Architecture University of Umm Al-Qura P.O. Box 5555 Makkah Saudi Arabia

Pavements usually experience different types of distress due to repeated traffic loads, aggressive environmental conditions, construction materials, soil condition of the underline subgrade, and the method of construction. Longitudinal and transverse cracking, potholes, rutting, and bleeding are common examples of such distresses associated with flexible pavements. As time progresses, the severity of these distreaaes increases and consequently, ride quality is adversely affected. Early detection and measurement of the extent of distresses coupled with prompt reactive measures are necessary to keep the pavement function at an acceptable level. Traditional methods for distress detection and measurement are laborious, time consuming, and subject the involved personnel to accidents. In contrast, image measurement methods are effortless, safe, and can be performed in a short time. This research paper performs image processing measurements to estimate areas of a pothole and alligator cracking, and sets a program for plane measurements of an area that experience rutting. The image measurements are compared with the traditional measurements. The results show that image measurements are close to those obtained by using the traditional methods.

关键词： Traffic signals

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