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BPELDT - Data-aware extension of BPEL to support data-intensive service applications

BPELDT - Data-aware extension of BPEL to support data-intens...

2nd Workshop on Emerging Web Service technology, WEWST 2007, in Conjunction with the 5th European Conference on Web Services, ECOWS 2007

作者： Habich, Dirk Richly, Sebastian Grasselt, Mike Preissler, Steffen Lehner, Wolfgang Maier, Albert Dresden University of Technology Database Technology Group Germany Dresden University of Technology Software Engineering Group Germany IBM Boeblingen Lab. Germany Information Server SWG SOA Integration Germany

Aside from business processes, the service-oriented approach-currently realized with Web services and BPEL-should be utilizable for data-intensive applications as well. Fundamentally, data-intensive applications are characterized by (i) a sequence of functional operations processing large amounts of data and (ii) the delivery and transformation of huge data sets between those functional activities. However, for the efficient handling of massive data sets, a significant amount of data infrastructure is required and the predefined 'by value' data semantic within the invocation of Web services and BPEL is not well suited for this context. To tackle this problem on the BPEL level, we developed a seamless extension to BPEL-the 'BPEL data transitions'.

关键词： Web services

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Physically based simulation of fluid mixtures

Physically based simulation of fluid mixtures

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2007 10th IEEE International Conference on Computer Aided Design and Computer Graphics, CAD/Graphics 2007

作者： Wu, Enhua State Key Lab of Computer Science Institute of Software Chinese Academy of Sciences Beijing China Department of Computer and Information Science Faculty of Science and Technology University of Macau Macao China

ISBN: (纸本)9781424415793

In our daily life, we may often see various natural phenomena of fluid mixtures, like pouring honey/ink into water, Coca Cola into strong wine etc. In fluid simulation, since fluids can not hold the shear stress, their shapes usually vary drastically in their dynamics. Interaction among multiple fluids in different features becomes even more difficult. Since the late 90s of the last century, graphics researchers have simulated lots of natural effects on fluid simulation for animating such as smoke, fire or water. However, little attention has been paid to demonstrating the effect of fluid mixtures. In the fluid mixture simulation, interactions among fluid mixtures in different kinds would generate comprehensive behavior. To investigate the interaction behavior in physically-based simulation of the fluids, it is of importance to build physically correct models to represent the varying interactions among the fluid mixtures. In this talk, stress will be put on the physically based simulation of fluid mixtures, in particular the mixture in two fluids, or binary mixtures. We will introduce the fundamental principle of the physics in the fluid mixture phenomena, and then the primary solutions to the simulation. The approaches we have proposed for the solution to the fluid mixture simulation will be introduced in detail, with various simulation results to be demonstrated. In some of the methods, advantage is taken with the Graphics Processing Unit (GPU) to achieve real-time computation for the simulation. Roughly in terms of the miscibility of binary mixtures, the fluid mixture can be categorized into immiscible mixtures such as bubbles in liquid or oil in water, and miscible mixtures such as honey dissolving in water. The visual appearance of the mixture physically roots in two opposite processes: the diffusing and the demixing. The diffusing process leads to the dissolving effect such as honey dissolving in water, while the demixing process leads to the separation (or de

关键词： Graphics processing unit

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An access control model in lager-scale P2P file sharing systems

An access control model in lager-scale P2P file sharing syst...

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7th International Conference on Computational Science (ICCS 2007)

作者： Yue Guang-xue Yu Fei Chen Li-ping Chen Yi-jun College of Information Engineering Jiaxing University 314000 China Department of Computer Science and Technology Huaihua University 418000 China State Key Lab. for Novel Software Technology Nanjing University 210093 China Jiangsu Provincial Key Laboratory of Computer Information Processing Technology Suzhou University 2150063 China

ISBN: (纸本)9783540725893

In lager-scale P2P file sharing systems, peers often must interact with unknown or unfamiliar peers without the benefit of trusted third parties or authorities to mediate the interactions. The decentralized and anonymous characteristics of P2P environments make the task of controlling access to sharing information more difficult. In this paper, we identify access control requirements and propose a trust based access control framework for P2P file-sharing systems. The model integrates aspects of trust and recommendation, fairness based participation schemes and access control schemes.

关键词： Distributed computer systems

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Enhanced random testing for programs with high dimensional input domains

Enhanced random testing for programs with high dimensional i...

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19th International Conference on software engineering and Knowledge engineering, SEKE 2007

作者： Kuo, F.-C. Sim, K.-Y. Sun, Chang-Ai Tang, S.-F. Zhou, Zhi Quan Faculty of Information and Communication Technologies Swinburne University of Technology Australia School of Engineering Sarawak Campus Swinburne University of Technology Malaysia Department of Mathematics and Computing Science University of Groningen Netherlands School of Computer Science and Software Engineering University of Wollongong Australia

ISBN: (纸本)9781627486613

Random Testing (RT) is a fundamental technique of software testing. Adaptive Random Testing (ART) has recently been developed as an enhancement of RT that has better fault detection effectiveness. Several methods (algorithms) have been developed to implement ART. In most ART algorithms, however, the above enhancement diminishes when the dimensionality of the input domain increases. In this paper, we investigate the nature of failure regions in high dimensional input domains and propose enhanced random testing algorithms that improve the fault detection effectiveness of RT in high dimensional input domains. Copyright © (2007) by Knowledge Systems Institute (KSI).

关键词： software testing

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A study on effects of waiting period in software operation on the operator's psychophysiological state

IEEJ Transactions on Electronics, Information and Systems

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IEEJ Transactions on Electronics, information and Systems 2007年第10期127卷 1770-1779+40页

作者： Hayasaka, Yoshiaki Kimura, Tatsuhiro Segawa, Norihisa Miyazaki, Masatoshi Yamazaki, Kiyoyuki Murayama, Yuko Graduate School of Software and Information Science Iwate Prefectural University 152-52 Sugo Takizawa Takizawa Iwate 020-0193 Japan Information and Communication Technology School of High-Technology for Human Welfare Tokai University 317 Nishino Numazu Shizuoka 410-0395 Japan Faculty of Software and Information Science Iwate Prefectural University 152-52 Sugo Takizawa Takizawa Iwate 020-0193 Japan Tohoku University 11-3 Akebonomachi Aobaku Sendai 981-0963 Japan Bio-Medical Engineering School of High-Technology for Human Welfare Tokai University 317 Nishino Numazu Shizuoka 410-0395 Japan

The authors have been studying psychophysiological workload of human interface (HI) with physiological measurements and analysis. In this study, we investigated a kind of mental workload produced by user's unexpected waiting period from the request input to the termination of data processing during personal computer (PC) operation. As the experimental setting of HI, we used interactive software containing easy questions with unexpected time interval between each question. The effects of progress indicator (PI) indicating during waiting period on psychophysiological status of users were analyzed by using respiration, finger plethysmogram (PTG), heart rate (HR) and electroencephalogram (EEG) measurements. Results showed that the theta wave component of the EEG increased in the non-PI condition, even though autonomic nervous system parameters showed no significant change. Negative correlation between preference score for HI and integrated theta component percentage was observed only in non-PI condition. It is supposed that the PI was controlling theta activity coused by waiting stress in experimental condition. Utilizing physiological indices for HI assessment, this experimental method could be available to waiting stress estimation.

关键词： Electroencephalography

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A New Grid Economy Architecture with Resources Pricing Fluctuation Module

A New Grid Economy Architecture with Resources Pricing Fluct...

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第六届网格与协同计算国际会议(The Sixth International Conference on Grid and Cooperative Computing GCC 2007)

作者： Guanfeng Liu Yuebin Xu Computer Software Lab Faculty of Information and EngineeringQingdao University P.R.China

The research to the grid economy is gradually becomes a new hot spot with the grid technology *** recent years there are also some remarkable results in this area of research, for example the middleware,Grid Architecture for Computational Economy (GRACE), however, in the research process, the GRA CE has been discovered that the module of pricing fluctuation is not explicit. In grid economy architecture the fixed prices of resources will cause a problem whereby the profit to the providers will be significantly reduced, additionally, this will cause the reduction of the success ratio of tasks accomplishment. This paper presents a new kind of pricing fluctuation module called Resources Pricing Fluctuation Manager (RPFM), as part of GRACE architecture. It also presents the detailed inner architecture and makes a discussion of each part of RPFM. At the end, the paper shows the significance of the RPFM module through simulating experiment.

关键词： Pricing Fluctuations Computer architecture Grid computing Resource management Middleware Computational modeling Processor scheduling Bandwidth Gamma ray bursts

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Evolution of web applications with aspect-oriented design patterns

Evolution of web applications with aspect-oriented design pa...

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2nd International Workshop on Adaptation and Evolution in Web Systems engineering, AEWSE 2007

作者： Bebjak, Michal Vranić, Valentino Dolog, Peter Institute of Informatics and Software Engineering Faculty of Informatics and Information Technology Slovak University of Technology Ilkovičova 3 84216 Bratislava 4 Slovakia Department of Computer Science Aalborg University Fredrik Bajers Vej 7 DK-9220 Aalborg EAST Denmark

It is more convenient to talk about changes in a domainspecific way than to formulate them at the programming construct level or-even worse-purely lexical level. Using aspect-oriented programming, changes can be modularized and made reapplicable. In this paper, selected change types in web applications are analyzed. They are expressed in terms of general change types which, in turn, are implemented using aspect-oriented programming. Some of general change types match aspect-oriented design patterns or their combinations.

关键词： Aspect oriented programming

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Adaptive Educational Gameplay within Smart Multipurpose Interactive Learning Environment

Adaptive Educational Gameplay within Smart Multipurpose Inte...

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International Workshop on Semantic Media Adaptation and Personalization (SMAP)

作者： Marko Diveky Peter Jurnecka Rudolf Kajan Ludolf Omelina Maria Bielikova Institution of Informatics and Software Engineering Faculty of Informatics and Information Technologies Slovak University of Technology Bratislava Slovakia

Modern technologies have brought many innovations into the system of education. Learners now have an opportunity to educate with the help of electronic materials often provided by web-based infrastructures. Although the majority of learners - especially children or teenagers - find studying from such materials less exciting than playing today's popular computer games that, however, lack signs of education. In this paper, we describe an innovative concept of three-dimensional interactive educational games that combine the excitement and looks of popular computer games with the educational potential of electronic study materials. One of the key issues is adaptability (games are also playable by handicapped users) and adaptivity according to learners' level of knowledge. Together with automatic generation of educational games based on metadata provided by authors of educational materials, we enable the creation of educational games that have many shapes reflecting learners' needs.

关键词： Games Computer science education Informatics Educational technology software engineering information technology Technological innovation Systems engineering education Shape Educational programs

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Personalized Faceted Navigation for Multimedia Collections

Personalized Faceted Navigation for Multimedia Collections

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International Workshop on Semantic Media Adaptation and Personalization (SMAP)

作者： Michal Tvarozek Maria Bielikova Institute of Informatics and Software Engineering Faculty of Informatics and Information Technologies Slovak University of Technology Bratislava Slovakia

Existing multimedia information retrieval systems provide users with insufficient support for efficient searching for and browsing in multimedia content. Several possible solutions were proposed, such as using faceted metadata search or semantic clusters of search results. We describe the possibilities of using enhanced faceted navigation with support for personalization, collaboration and Semantic Web technologies for multimedia information retrieval. Furthermore, we propose a method of faceted browser adaptation with support for dynamic facet generation based on an automatically acquired user model.

关键词： Navigation Multimedia systems information retrieval Usability Content based retrieval Informatics Collaboration Semantic Web Image retrieval Video sharing

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A new data protecting scheme based on TPM

A new data protecting scheme based on TPM

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SNPD 2007: 8th ACIS International Conference on software engineering, Artificial Intelligence, Networking, and Parallel/Distributed Computing

作者： Mingdi, Xu Jian, He Bo, Zhang Huanguo, Zhang School of Computer State Key Lab. of Software Engineering Wuhan University Informationization Construction Teaching and Research Section Commanding Communications Academy Computer Faculty Working Office Electronic Information Department Hubei Water Resources Technical College

ISBN: (纸本)0769529097

Trusted platform model (TPM) is special-purpose integrated circuits built into a variety of platforms to enable strong user authentication and machine attestation-essential to prevent inappropriate access to confidential and sensitive information and to protect against compromised networks. As a necessary component for multifarious platforms, storage device keeps on a mass of data including confidential and secretive information. How to ensure data not to be accessed by unauthorized users effectively, and to guarantee information to be in safe and secure state? Aiming at these problems, we put forward a novel scheme for protecting data on personal computer platform. By combing trusted computing platform, we propose a secure and reliable model for user authentication and data encryption. The model uses storage protocol to establish a password system to encrypt data, and uses TPM to authenticate different users. We also implement this model by adding it into trusted computing platform. The enhanced platform can not only encrypt data per sector drastically, but also exclude those who can't be authenticated. Some external software attacks and physical theft also cut no ice. © 2007 IEEE.

关键词： Security of data

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