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Distributed content adaptation for pervasive systems

Distributed content adaptation for pervasive systems

引用

international conference on information technology: coding and computing (itcc)

作者： G. Berhe L. Brunie J.-M. Pierson Lyon Research Center for Images and Intelligent Information Systems Institut National des Sciences Appliquées de Lyon France

Pervasive systems are created by introducing wireless communication into distributed multimedia systems. These systems facilitate mobile data access to applications such as health care, tourism and emergency. However new challenges have emerged that has not been adequately addressed in traditional distributed multimedia systems. In pervasive systems, data must be adapted to the user's preferences, device capabilities and network conditions. Several content adaptation techniques have been proposed to fit the data to the usage environment. In this paper we present a distributed content adaptation framework (DCAF) for distributed multimedia systems and its prototype implementation. The architecture takes into consideration client profile, network conditions, content profile (meta-data) and available adaptation services (third party software elements) to construct an optimal dynamic adaptation graph.

关键词： Multimedia systems Streaming media Wireless communication Pervasive computing Personal digital assistants Displays Hardware Image converters Software performance Intelligent systems

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Language discrimination via PPM model

Language discrimination via PPM model

引用

international conference on information technology: coding and computing (itcc)

作者： E. Celikel International Computer Institute Ege University Izmir Turkey

In this study, the lossless compression tool employing an adaptive statistical modeling technique called prediction by partial matching (PPM) is used for written language discrimination. PPM can well serve as a cryptographic tool in that, while encoding, as long as the algorithm itself is unknown to the third parties, it rearranges the plaintext in a hard-to-recover form. Furthermore, PPM algorithm yields lossless compression to far better rates (in bits per character - bpc) than that of many other conventional compression tools. Trained version of PPM, which uses training text to gather symbol frequencies, is employed during implementation. Language identification experiment results obtained by applying the PPM model on sample texts from English, French and Turkish corpora are given. The rate of success yielded that the performance of the system is highly dependent on the diversity, as well as the size of the target and training texts. In practice, if the training text itself is kept secret, the system would provide cryptographic security to promising degrees.

关键词： Natural languages Cryptography Predictive models Encoding Statistical distributions Probability Artificial neural networks Manuals Frequency information security

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Misuse case-based design and analysis of secure software architecture

Misuse case-based design and analysis of secure software arc...

引用

international conference on information technology: coding and computing (itcc)

作者： J.J. Pauli D. Xu College of Business and Information Systems Dakota State University Madison SD USA Department of Computer Science North Dakota State University Fargo ND USA

This paper presents an approach to the architectural design and analysis of secure software systems based on the system requirements elicited in the form of use cases and misuse cases. We identify architectural components and their connections and analyze whether or not a candidate architecture can address security concerns. This provides a smooth transition from requirements specification to high-level design for engineering secure software systems, and greatly improves the traceability of security concerns, which allows a system developer to know what requirement an architectural component references back to. We demonstrate our approach through a case study on a security-intensive hospital information system.

关键词： Software architecture information security Software systems Computer architecture information systems Hospitals Communication system security Educational institutions Computer science Neodymium

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NIPPERS: network of interpolated PeERS for Web service discovery

NIPPERS: network of interpolated PeERS for Web service disco...

引用

international conference on information technology: coding and computing (itcc)

作者： C. Makris E. Sakkopoulos S. Sioutas P. Triantafillou A. Tsakalidis B. Vassiliadis Computer Engineering & Informatics Department University of Patras Patras Greece Internet and Multimedia Technologies Research Unit RA Computer Technology Institute Patras Greece Computer Science Digital Systems & Media Computing Laboratory Hellenic Open University Patras Greece

Web services are becoming an important enabler of the semantic Web. Besides the need for a rich description mechanism, Web service information should be made available in an accessible way for machine processing. In this paper, we propose a new P2P based approach for Web services discovery. Peers that store Web services information, such as data item descriptions, are efficiently located using a scalable and robust data indexing structure for peer-to-peer data networks, NIPPERS. We present a theoretical analysis which shows that the communication cost of the query and update operations scale double-logarithmically with the number of NIPPERS nodes. Furthermore, we show that the network is robust with respect to failures fulfilling quality of Web services requirements.

关键词： Web services Peer to peer computing Robustness Costs Interpolation Tree data structures Web and internet services Multimedia systems Multimedia computing Informatics

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A grid-enabled Web map server

A grid-enabled Web map server

引用

international conference on information technology: coding and computing (itcc)

作者： G. Aloisio M. Cafaro D. Conte S. Fiore I. Epicoco G.P. Marra G. Quarta Center for Advanced Computational Technologies/ISUFI University of Lecce Lecce Italy Institute of Atmospheric Sciences Climate of the Italian National Research Council Lecce Italy

Today Geographic information Systems (GIS) provide several tools for studying and analyzing varied human and natural phenomena, therefore GIS and geospatial data has grown so much in both public and private organizations. A challenge is the integration of these data to get innovative and exhaustive knowledge about topics of interest. In this paper we describe the design of a Web map service (WMS) OGC-compliant, through the use of grid computing technology and demonstrate how this approach can improve, w.r.t. security, performance, efficiency and scalability, the integration of geospatial multi-source data. End users, with a single sign-on, securely and transparently, gets maps whose data are distributed on heterogeneous data sources belonging to one or more Virtual Organizations via distributed queries in a grid computing environment.

关键词： Geographic information Systems Grid computing Application software Web services Computer architecture Service oriented architecture information analysis Data security information security Scalability

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Semantic grid - interoperability solution for construction VO?

Semantic grid - interoperability solution for construction V...

引用

international conference on information technology: coding and computing (itcc)

作者： Z. Turk M. Dolenc V. Stankovski E. Petrinja Construction Informatics University of Ljubljana Slovenia

Construction activities take place in what can be called a dynamic virtual organization (VO). VOs require a secure, reliable, scalable information infrastructure that allows collaboration and the sharing of information, computation and human resources. They need an infrastructure that would ensure the interoperability of their information systems while maintaining the privacy of their data, rapid joining and parting a VO and provide a higher quality of service, more information, faster computation, than available their own infrastructure. Grid technologies have been providing unpreceded computing and storage power. The paradigm is spinning off and is becoming the workhorse of networked business - something that the Web promised to become but failed to deliver. Construction industry is one of the most demanding users of VO infrastructures and could potentially enormously benefit from grid computing. In this position paper we present the state of the art and outline a research agenda. We propose a particular focusing of the research work on semantic grid technology and the coupling of the ontology and structured information exchange work into all layers of the grid - thereby making the grid infrastructure not only technically robust and secure but also aware of the business processes that take place in construction.

关键词： Grid computing Collaboration Humans information systems Maintenance Data privacy Quality of service Spinning Construction industry Ontologies

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A PCA-wavelet based coding scheme for distance learning image compression

A PCA-wavelet based coding scheme for distance learning imag...

引用

Fourth IASTED international conference on Communications, Internet, and information technology, CIIT 2005

作者： Li, Qin Fan, Qing Fu You, Jane Bhattacharya, Prabir Henan Provincial Key Lab on Information Network Hong Kong Logistics Group Ltd Zhengzhou University Zhengzhou China Department of Computing Hong Kong Polytechnic University Hong Kong Hong Kong Concordia Institute for Information Systems Engineering Concordia University Canada

ISBN: (纸本)0889865159

The large volume of images used in Distance Learning System are desirable to be compressed in a proper ratio to reduce the storage loading of computer servers and provide better VOD (Video on demand) services. A new PCA-Wavelet based coding Scheme for Distance Learning image compression is proposed in this paper. It consists of 1) Principle Components Analysis (PCA)to reduce the information redundancies along temporal dimension and a texture energy (TE)based technique used to classify the image sequence so that the PCA is optimized to produce better representative PCA channels for our handout images. 2) Wavelet decomposition and optimized LEG algorithm for compression in spatial domain. The experimental results demonstrate that our proposed coding scheme achieves good performance.

关键词： Image compression

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Elimination of redundant information for Web data mining

Elimination of redundant information for Web data mining

引用

international conference on information technology: coding and computing (itcc)

作者： S.M. Taib Soon-Ja Yeom Byeong-Ho Kang School of Computing University of Tasmania Australia

These days, billions of Web pages are created with HTML or other markup languages. They only have a few uniform structures and contain various authoring styles compared to traditional text-based documents. However, users usually focus on a particular section of the page that presents the most relevant information to their interest. Therefore, Web documents classification needs to group and filter the pages based on their contents and relevant information. Many researches on Web mining report on mining Web structure and extracting information from Web contents. However, they have focused on detecting tables that convey specific data, not the tables that are used as a mechanism for structuring the layout of Web pages. Case modeling of tables can be constructed based on structure abstraction. Furthermore, Ripple Down Rules (RDR) is used to implement knowledge organization and construction, because it supports a simple rule maintenance based on case and local validation.

关键词： Data mining Web pages Monitoring HTML information filtering information filters information retrieval Content based retrieval Markup languages Web mining

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The grid-DBMS: towards dynamic data management in grid environments

The grid-DBMS: towards dynamic data management in grid envir...

引用

international conference on information technology: coding and computing (itcc)

作者： G. Aloisio M. Cafaro S. Fiore M. Mirto Center for Advanced Computational Technologies University of Lecce Italy

Nowadays many data grid applications need to manage and process a huge amount of data distributed across multiple grid nodes and stored into heterogeneous databases. Grids encourage the publication of scientific data in a more open manner than is currently the case, and many e-Science projects have an urgent need to interconnect legacy, and independently operated databases through a set of data access and integration services. In the data grid area a set of dynamic and adaptive services could address specific issues related to automatic data management aiming at both providing high performance and fully exploiting a grid infrastructure. In this paper we introduce the grid-DBMS concept, a framework for dynamic data management in grid environments, highlighting its requirements, architecture, components and services.

关键词： Environmental management Grid computing Distributed databases Distributed computing Power system reliability Middleware technology management Computer architecture Project management Relational databases

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Formalisation and implementation of access control models

Formalisation and implementation of access control models

引用

international conference on information technology: coding and computing (itcc)

作者： M. Jaume C. Morisset SPI LIP6 University of Paris 6 Paris France

Access control software must be based on a security policy model. Flaws in them may come from a lack of precision or some incoherences in the policy model or from inconsistencies between the model and the code. In this paper, we first present a formalisation of access control models based on the work on an algebra of security models by J. McLean (1988). Then, we describe the implementation of this framework and show how it can be used to obtain a particular security model: the Bell and La Padula security model. Last, as an example, we show how such a program can be integrated for secure databases. All our development is done within the Focal (Rioboo et al., 2004) programming environment which provides a language with object-oriented features allowing to write formal specifications, proofs and programs at the same level.

关键词： Access control Object oriented modeling information security Data security Computer security Mathematical model Safety information technology Algebra Object oriented databases

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