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Due to the lack of a uniform schema for Web documents and the sheer amount and dynamics of Web data, both the effectiveness and the efficiency of information management and retrieval of Web data is often unsatisfactory when using conventional data management techniques. Web community, defined as a set of Web-based documents with its own logical structure, is a flexible and efficient approach to support information retrieval and to implement various applications. Zhang and his co-authors explain how to construct and analyse Web communities based on information like Web document contents, hyperlinks, or user access logs. Their approaches combine results from Web search algorithms, Web clustering methods, and Web usage mining. They also detail the necessary preliminaries needed to understand the algorithms presented, and they discuss several successful existing applications. Researchers and students in information retrieval and Web search find in this all the necessary basics and methods to create and understand Web communities. Professionals developing Web applications will additionally benefit from the samples presented for their own designs and implementations.

Web search engines. --- Vector spaces. --- Text processing (Computer science) --- World Wide Web. --- W3 (World Wide Web) --- Web (World Wide Web) --- World Wide Web (Information retrieval system) --- WWW (World Wide Web) --- Hypertext systems --- Multimedia systems --- Internet --- Processing, Text (Computer science) --- Database management --- Electronic data processing --- Information storage and retrieval systems --- Word processing --- Linear spaces --- Linear vector spaces --- Algebras, Linear --- Functional analysis --- Vector analysis --- Web searching --- World Wide Web searching --- Internet searching --- Search engines --- Web portals --- World Wide Web --- Subject access

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Asia Information Retrieval Symposium (AIRS) 2006 was the third AIRS conf- ence in the series established in 2004.The ?rst AIRS washeld in Beijing, China, and the 2nd AIRS was held in Cheju, Korea. The AIRS conference series traces its roots to the successful Information Retrieval with Asian Languages (IRAL) workshop series which started in 1996. The AIRS series aims to bring together international researchers and dev- opers to exchange new ideas and the latest results in information retrieval. The scope of the conference encompassed the theory and practice of all aspects of information retrieval in text, audio, image, video, and multimedia data. Wearehappyto reportthatAIRS2006received148submissions,thehighest number since the conference series started in 2004. Submissions came from Asia and Australasia, Europe, and North America. We accepted 34 submissions as regular papers (23%) and 24 as poster papers (16%). We would like to thank all the authors who submitted papers to the conf- ence, the seven area chairs, who worked tirelessly to recruit the program c- mittee members and oversaw the review process, and the program committee members and their secondary reviewers who reviewed all the submissions.

Information storage and retrieval systems --- Information retrieval --- Database searching --- Internet searching --- Information technology --- Systèmes d'information --- Recherche de l'information --- Bases de données --- Recherche sur Internet --- Technologie de l'information --- Congresses. --- Congrès --- Interrogation --- Computer Science --- Library & Information Science --- Engineering & Applied Sciences --- Social Sciences --- Searching the Internet --- Web searching --- World Wide Web searching --- Computer science. --- Data structures (Computer science). --- Algorithms. --- Computer science --- Information storage and retrieval. --- Computer Science. --- Information Storage and Retrieval. --- Information Systems Applications (incl. Internet). --- Algorithm Analysis and Problem Complexity. --- Data Structures. --- Data Storage Representation. --- Discrete Mathematics in Computer Science. --- Mathematics. --- Computer mathematics --- Discrete mathematics --- Electronic data processing --- Algorism --- Algebra --- Arithmetic --- Information structures (Computer science) --- Structures, Data (Computer science) --- Structures, Information (Computer science) --- File organization (Computer science) --- Abstract data types (Computer science) --- Informatics --- Science --- Mathematics --- Foundations --- Electronic information resource searching --- Information storage and retrieva. --- Computer software. --- Data structures (Computer scienc. --- Computational complexity. --- Complexity, Computational --- Machine theory --- Software, Computer --- Computer systems --- Information storage and retrieval systems. --- Automatic data storage --- Automatic information retrieval --- Automation in documentation --- Computer-based information systems --- Data processing systems --- Data storage and retrieval systems --- Discovery systems, Information --- Information discovery systems --- Information processing systems --- Information retrieval systems --- Machine data storage and retrieval --- Mechanized information storage and retrieval systems --- Electronic information resources --- Data libraries --- Digital libraries --- Information organization --- Application software. --- Computer science—Mathematics. --- Application computer programs --- Application computer software --- Applications software --- Apps (Computer software) --- Computer software

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Web search engines --- Electronic information resources --- Digital libraries. --- Library materials --- Libraries and the Internet. --- Information organization. --- Internet --- Internet industry --- Digitization. --- Social aspects. --- Documentation de bibliothèque --- Numérisation --- Google (Firm) --- Digital libraries --- Information organization --- Libraries and the Internet --- 02 --- Web searching --- World Wide Web searching --- Internet searching --- Search engines --- Web portals --- World Wide Web --- Digitalization of library materials --- Digitization of library materials --- Internet and libraries --- Computer industry --- Information storage and retrieval --- Organization of information --- Information science --- Information storage and retrieval systems --- Digital information resources --- Digital resources (Information resources) --- Electronic information sources --- Electronic resources (Information resources) --- Information resources --- Digital curation --- Digital media collections --- Digital media libraries --- Digital repositories --- Electronic libraries --- Electronic publication collections --- Electronic publication libraries --- Electronic text collections --- Repositories, Digital --- Virtual libraries --- Libraries --- Web archives --- 02 Bibliotheekwezen --- Bibliotheekwezen --- Social aspects --- Digitization --- Subject access --- Google Inc. --- جوجل (Firm) --- Jūjil (Firm) --- Jūjal (Firm) --- شركة جوجل المحدودة --- Sharikat Jūjil al-Maḥdūdah --- Sharikat Jūjal al-Maḥdūdah --- Gugolu (Firm) --- Гугъл (Firm) --- Gugŭl (Firm) --- Кукăль (Firm) --- Kukălʹ (Firm) --- گوگل (Firm) --- شرکت گوگل --- Shirkat-i Gūgul --- 구글 (Firm) --- Kugŭl (Firm) --- גוגל (Firm) --- Gugel (Firm) --- グーグル (Firm) --- Gūguru (Firm) --- Гугл (Firm) --- Gugl (Firm) --- Google. --- BackRub --- Moteurs de recherche sur Internet --- Bibliothèques virtuelles --- Documentation de bibliothèque --- Forecasting --- Numérisation --- Prévision --- Web search engines - Europe. --- Electronic information resources - Europe. --- Library materials - Digitization. --- Internet - Social aspects. --- Internet industry - Europe. --- Acqui 2006 --- Google --- Bibliothèques virtuelles