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2009 Joint Conferences on Pervasive Computing (JCPC)最新文献

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An extensible XACML authorization decision engine for context aware applications 用于上下文感知应用程序的可扩展XACML授权决策引擎
2009 Joint Conferences on Pervasive Computing (JCPC) Pub Date : 2009-12-01 DOI: 10.1109/JCPC.2009.5420155
Marwan Cheaito, R. Laborde, F. Barrère, A. Benzekri
{"title":"An extensible XACML authorization decision engine for context aware applications","authors":"Marwan Cheaito, R. Laborde, F. Barrère, A. Benzekri","doi":"10.1109/JCPC.2009.5420155","DOIUrl":"https://doi.org/10.1109/JCPC.2009.5420155","url":null,"abstract":"Context-awareness is a central aspect of pervasive computing applications. However, the information representing a context evolves with the capability of the technology embedded in pervasive devices. As a consequence, access control systems should be able to support and understand any new context information in order to address access control requirements. In this article, we present an extensible XACML (eXtensible Access Control Markup Language) authorization decision engine to provide such flexibility. In attribute based access control like XACML, extending the policy authorization engine means extending its ability to understand new attributes data types including the functions that are used in the policy to evaluate the users' requests. We show there are two kinds of data types to consider in the context of access control system: data types of which both the values and the order relations are initially known, and data types of which neither the value nor the relation order are initially known. Based on this analysis, we present an extensible architecture for implementing XACML decision authorization engine composed of a core component that can be enhanced by additional data type modules. This architecture has been implemented in Java and includes an API for writing new data type modules.","PeriodicalId":284323,"journal":{"name":"2009 Joint Conferences on Pervasive Computing (JCPC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127508050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Transitional results on symbian based call quality measurement for telecommunication network 基于symbian的电信网通话质量测量的过渡结果
2009 Joint Conferences on Pervasive Computing (JCPC) Pub Date : 2009-12-01 DOI: 10.1109/JCPC.2009.5420137
Akram Aburas, J. Gardiner, Zeyad Al Hokail
{"title":"Transitional results on symbian based call quality measurement for telecommunication network","authors":"Akram Aburas, J. Gardiner, Zeyad Al Hokail","doi":"10.1109/JCPC.2009.5420137","DOIUrl":"https://doi.org/10.1109/JCPC.2009.5420137","url":null,"abstract":"The proposed methodology addresses the issue of call quality from the end users and operators perspective. The purpose here is to present the emerging result of the research work, which is more on the development of the software for the speech quality analysis. The idea is aimed at developing an algorithm that will be driven by the operating system to measure certain call parameter during calls and provide average scores at the end of the call. Such call parameters includes, the successful call rate, drop call rate, handover success rate, handover failure rate and Location Area Code (LAC).","PeriodicalId":284323,"journal":{"name":"2009 Joint Conferences on Pervasive Computing (JCPC)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127511112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Rich media indexing and retrieval in an Object XML database system 对象XML数据库系统中的富媒体索引与检索
2009 Joint Conferences on Pervasive Computing (JCPC) Pub Date : 2009-12-01 DOI: 10.1109/JCPC.2009.5420063
Qing Li, H. C. Mak, Jianmin Zhao, Xinzhong Zhu
{"title":"Rich media indexing and retrieval in an Object XML database system","authors":"Qing Li, H. C. Mak, Jianmin Zhao, Xinzhong Zhu","doi":"10.1109/JCPC.2009.5420063","DOIUrl":"https://doi.org/10.1109/JCPC.2009.5420063","url":null,"abstract":"Rich media (including Flash, PowerPoint) presentations are gaining widespread usage nowadays, particularly in the domains of e-learning and digital entertainment. There are countless animation movies available now throughout the Internet. In order to allow animation movies to be queried, we present in this paper an Object XML model by converting animation movies into XML format, followed by storing XML data in a native object-oriented database. We then apply Structural Join Index Hierarchy (SJIH) indexing technique to enhance retrieval of such XML objects. A detailed cost model for query execution through SJIH is developed. Our experimental studies on accessing Flash movies using SJIH has demonstrated performance advantageous when compared with other indexing techniques.","PeriodicalId":284323,"journal":{"name":"2009 Joint Conferences on Pervasive Computing (JCPC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127744011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Eye-tracking viewers' processing of web-based multimedia information 基于网络的多媒体信息的眼球追踪处理
2009 Joint Conferences on Pervasive Computing (JCPC) Pub Date : 2009-12-01 DOI: 10.1109/JCPC.2009.5420094
Han-Chin Liu
{"title":"Eye-tracking viewers' processing of web-based multimedia information","authors":"Han-Chin Liu","doi":"10.1109/JCPC.2009.5420094","DOIUrl":"https://doi.org/10.1109/JCPC.2009.5420094","url":null,"abstract":"This study utilized eye-tracking technology to realize how viewers processed web-based multimedia information. Eight non-science major college students participated in this study. The students' eyes were more fixated on the text than on the illustration area when viewing the web pages. The text explanations seemed to provide greater detail than the pictorial information in presenting the content knowledge. Using successive web pages with less information seemed to promote more eye fixations on the illustration area. It was possibly because this reduced students' cognitive workload in information processing. Eye-tracking technology was helpful in exploring students' cognitive processes in multimedia learning. Discussions and suggestions for instructional designers and for future studies are provided in this paper.","PeriodicalId":284323,"journal":{"name":"2009 Joint Conferences on Pervasive Computing (JCPC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127760049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
An early fraud detection mechanism for online auctions based on phased modeling 一种基于阶段建模的在线拍卖早期欺诈检测机制
2009 Joint Conferences on Pervasive Computing (JCPC) Pub Date : 2009-12-01 DOI: 10.1109/JCPC.2009.5420085
Jau-Shien Chang, Wen-Hsi Chang
{"title":"An early fraud detection mechanism for online auctions based on phased modeling","authors":"Jau-Shien Chang, Wen-Hsi Chang","doi":"10.1109/JCPC.2009.5420085","DOIUrl":"https://doi.org/10.1109/JCPC.2009.5420085","url":null,"abstract":"Reputation systems provided by online auction sites are the only countermeasure available for buyers to evaluate a seller's credit. Unfortunately, feedback score mechanisms are too easily manipulated creating falsely overrated reputations. Therefore, developing an effective fraud detection method can assist the user in identifying cases of fraud. However, none of existing research addresses the most important issue of early fraud detection, which is, discovering a fraudster before he defrauds. For effective early fraud detection for online auctions, this paper proposes a novel phased detection framework to identify a potential fraudster as early as possible. To heighten precision in detection, different quantifiable behavioral features were extracted and integrated with regression model trees to build phased fraud behavior models. To demonstrate the effectiveness of the proposed method, real transaction data were collected from Taiwan's Yahoo!Kimo for training and testing. The experimental results with these models show that the recall rate of fraud detection is over 82%.","PeriodicalId":284323,"journal":{"name":"2009 Joint Conferences on Pervasive Computing (JCPC)","volume":"195 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116497452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Optimal grouping by using Genetic Algorithm and Support Vector Machines 基于遗传算法和支持向量机的最优分组
2009 Joint Conferences on Pervasive Computing (JCPC) Pub Date : 2009-12-01 DOI: 10.1109/JCPC.2009.5420079
Kuan-Cheng Lin, Mei-Lian Shiau, Shu-Ying Lin, Jui Tai
{"title":"Optimal grouping by using Genetic Algorithm and Support Vector Machines","authors":"Kuan-Cheng Lin, Mei-Lian Shiau, Shu-Ying Lin, Jui Tai","doi":"10.1109/JCPC.2009.5420079","DOIUrl":"https://doi.org/10.1109/JCPC.2009.5420079","url":null,"abstract":"Nowadays with bloom of Internet technology, students can do their learning by digital learning platform even they are not in class. To diversify teaching and to improve effects in learning, many researchers strongly advocate cooperative learning and come out many essays in the field.","PeriodicalId":284323,"journal":{"name":"2009 Joint Conferences on Pervasive Computing (JCPC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122981929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Constructing a curriculum map to support learning navigation 构建课程地图，支持学习导航
2009 Joint Conferences on Pervasive Computing (JCPC) Pub Date : 2009-12-01 DOI: 10.1109/JCPC.2009.5420216
Peng-Wen Chen, Yi-Hsien Wu
{"title":"Constructing a curriculum map to support learning navigation","authors":"Peng-Wen Chen, Yi-Hsien Wu","doi":"10.1109/JCPC.2009.5420216","DOIUrl":"https://doi.org/10.1109/JCPC.2009.5420216","url":null,"abstract":"A curriculum map, as well as a roadmap, could be used as a tool for a learning tour, i.e., guiding learners who are “going from one course to another toward a particular learning target”. In this research, the curriculum map is composed of curriculums and links, in which each curriculum is treated as a node (like cities on a roadmap), and the links among the nodes are generated by “competence keywords mapping.” The competence keywords are segmented by the efforts of “competence description in Chinese.” These efforts are achieved from the competence requirements of curricula, jobs, certifications, and education purposes. In addition, via the proposed curriculum information system (CIS), the competence mapping results can be visualized as a map to guide a learner who is undergoing learning navigation among the recommended curricula.","PeriodicalId":284323,"journal":{"name":"2009 Joint Conferences on Pervasive Computing (JCPC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126471632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Troublesome detectable context-aware services based on game-theory 基于博弈论的麻烦的可检测上下文感知服务
2009 Joint Conferences on Pervasive Computing (JCPC) Pub Date : 2009-12-01 DOI: 10.1109/JCPC.2009.5420213
Zixue Cheng, Mizuo Kansen, Tongjun Huang
{"title":"Troublesome detectable context-aware services based on game-theory","authors":"Zixue Cheng, Mizuo Kansen, Tongjun Huang","doi":"10.1109/JCPC.2009.5420213","DOIUrl":"https://doi.org/10.1109/JCPC.2009.5420213","url":null,"abstract":"With rapid progress on ubiquitous technologies, various services become available at anytime and anywhere. One of hot topics in ubiquitous computing is context-aware services, which provide the services at proper time and proper place, in a proper way personalized to a user. However, there may be conflicts of services among users whose contexts are overlapped. Moreover, a context-aware service convenient for a user may cause another user's unpleasantness even troublesome. In this paper, we consider the relations between contexts of different users. A mechanism consisting of multi-agents, to find and reduce the unpleasantness of users due to context-aware services is constructed based on game-theory.","PeriodicalId":284323,"journal":{"name":"2009 Joint Conferences on Pervasive Computing (JCPC)","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128047083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hybrid semantic retrieval = User-community Profiling + Domain Knowledge + Content-based retrieval 混合语义检索=用户社区分析+领域知识+基于内容的检索
2009 Joint Conferences on Pervasive Computing (JCPC) Pub Date : 2009-12-01 DOI: 10.1109/JCPC.2009.5420188
Qing Li, Haoran Xie, Wei Chen, Lijuan Yu
{"title":"Hybrid semantic retrieval = User-community Profiling + Domain Knowledge + Content-based retrieval","authors":"Qing Li, Haoran Xie, Wei Chen, Lijuan Yu","doi":"10.1109/JCPC.2009.5420188","DOIUrl":"https://doi.org/10.1109/JCPC.2009.5420188","url":null,"abstract":"The paradigm of Content-based retrieval (CBR) with query-by-example (QBE) has been prevailing in multimedia applications and systems. While the CRB/QBE approach is easy to use from the end-user's perspective, it is not always possible for a user to prepare/have a suitable “example” in hand; besides, the lack of semantics inherent to this approach may cause strange things to happen (e.g., funny results). In this paper, we argue that multimedia retrieval should be knowledge-based and semantics-driven, preferably with personalization support. Through a case study on a distributed multimedia recipe database (DMRD) system, we show that User-community Profiling + Domain Knowledge + CBR (including keywords/QBE) is an effective way to go forward. Experiments on a prototype of DMRD system demonstrate the feasibility and effectiveness of such a hybrid approach we are advocating.","PeriodicalId":284323,"journal":{"name":"2009 Joint Conferences on Pervasive Computing (JCPC)","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132746373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
An SLA based Web Service quality monitor system 基于SLA的Web服务质量监控系统
2009 Joint Conferences on Pervasive Computing (JCPC) Pub Date : 2009-12-01 DOI: 10.1109/JCPC.2009.5420099
Liang Li, Meina Song, Xiaoqi Zhang
{"title":"An SLA based Web Service quality monitor system","authors":"Liang Li, Meina Song, Xiaoqi Zhang","doi":"10.1109/JCPC.2009.5420099","DOIUrl":"https://doi.org/10.1109/JCPC.2009.5420099","url":null,"abstract":"Web Service is a kind of interface to achieve communication between the isolated information. It can be described, released, finded and invoked through Web. SLA(Service Level Agreement) provides a formal contract between service provider and consumer after negotiation, which states the quality, priority and obligation of the service. This paper proposed an SLA based Web Service quality monitor system to administer and evaluate the quality of Web Service. This design brings forward the parameters to be measured and some correlative protocols.","PeriodicalId":284323,"journal":{"name":"2009 Joint Conferences on Pervasive Computing (JCPC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130923015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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