Search (3 results, page 1 of 1)

0.0074754483 = product of:
  0.014950897 = sum of:
    0.014950897 = product of:
      0.029901793 = sum of:
        0.029901793 = weight(_text_:1998 in 1486) [ClassicSimilarity], result of:
          0.029901793 = score(doc=1486,freq=2.0), product of:
            0.17527951 = queryWeight, product of:
              3.8601224 = idf(docFreq=2531, maxDocs=44218)
              0.04540776 = queryNorm
            0.17059492 = fieldWeight in 1486, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.8601224 = idf(docFreq=2531, maxDocs=44218)
              0.03125 = fieldNorm(doc=1486)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

Interested in how an efficient search engine works? Want to know what algorithms are used to rank resulting documents in response to user requests? The authors answer these and other key information on retrieval design and implementation questions is provided. This book is not yet another high level text. Instead, algorithms are thoroughly described, making this book ideally suited for both computer science students and practitioners who work on search-related applications. As stated in the foreword, this book provides a current, broad, and detailed overview of the field and is the only one that does so. Examples are used throughout to illustrate the algorithms. The authors explain how a query is ranked against a document collection using either a single or a combination of retrieval strategies, and how an assortment of utilities are integrated into the query processing scheme to improve these rankings. Methods for building and compressing text indexes, querying and retrieving documents in multiple languages, and using parallel or distributed processing to expedite the search are likewise described. This edition is a major expansion of the one published in 1998. Neuaufl. 2005: Besides updating the entire book with current techniques, it includes new sections on language models, cross-language information retrieval, peer-to-peer processing, XML search, mediators, and duplicate document detection.

0.006659871 = product of:
  0.013319742 = sum of:
    0.013319742 = product of:
      0.026639484 = sum of:
        0.026639484 = weight(_text_:22 in 150) [ClassicSimilarity], result of:
          0.026639484 = score(doc=150,freq=6.0), product of:
            0.15901025 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04540776 = queryNorm
            0.16753313 = fieldWeight in 150, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.01953125 = fieldNorm(doc=150)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Classification

006.7 22

Date

7. 3.2007 19:30:22

DDC

006.7 22

0.0046721552 = product of:
  0.0093443105 = sum of:
    0.0093443105 = product of:
      0.018688621 = sum of:
        0.018688621 = weight(_text_:1998 in 1792) [ClassicSimilarity], result of:
          0.018688621 = score(doc=1792,freq=2.0), product of:
            0.17527951 = queryWeight, product of:
              3.8601224 = idf(docFreq=2531, maxDocs=44218)
              0.04540776 = queryNorm
            0.106621824 = fieldWeight in 1792, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.8601224 = idf(docFreq=2531, maxDocs=44218)
              0.01953125 = fieldNorm(doc=1792)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Footnote

Rez. in: JASIST 54(2003) no.12, S.1166-1167 (Brenda Chawner): "Kochtanek and Matthews have written a welcome addition to the small set of introductory texts an applications of information technology to library and information Services. The book has fourteen chapters grouped into four sections: "The Broader Context," "The Technologies," "Management Issues," and "Future Considerations." Two chapters provide the broad content, with the first giving a historical overview of the development and adoption of "library information systems." Kochtanek and Matthews define this as "a wide array of solutions that previously might have been considered separate industries with distinctly different marketplaces" (p. 3), referring specifically to integrated library systems (ILS, and offen called library management systems in this part of the world), and online databases, plus the more recent developments of Web-based resources, digital libraries, ebooks, and ejournals. They characterize technology adoption patterns in libraries as ranging from "bleeding edge" to "leading edge" to "in the wedge" to "trailing edge"-this is a catchy restatement of adopter categories from Rogers' diffusion of innovation theory, where they are more conventionally known as "early adopters," "early majority," "late majority," and "laggards." This chapter concludes with a look at more general technology trends that have affected library applications, including developments in hardware (moving from mainframes to minicomputers to personal Computers), changes in software development (from in-house to packages), and developments in communications technology (from dedicated host Computers to more open networks to the current distributed environment found with the Internet). This is followed by a chapter describing the ILS and online database industries in some detail. "The Technologies" begins with a chapter an the structure and functionality of integrated library systems, which also includes a brief discussion of precision versus recall, managing access to internal documents, indexing and searching, and catalogue maintenance. This is followed by a chapter an open systems, which concludes with a useful list of questions to consider to determine an organization's readiness to adopt open source solutions. As one world expect, this section also includes a detailed chapter an telecommunications and networking, which includes types of networks, transmission media, network topologies, switching techniques (ranging from dial up and leased lines to ISDN/DSL, frame relay, and ATM). It concludes with a chapter an the role and importance of standards, which covers the need for standards and standards organizations, and gives examples of different types of standards, such as MARC, Dublin Core, Z39.50, and markup standards such as SGML, HTML, and XML. Unicode is also covered but only briefly. This section world be strengthened by a chapter an hardware concepts-the authors assume that their reader is already familiar with these, which may not be true in all cases (for example, the phrase "client-Server" is first used an page 11, but only given a brief definition in the glossary). Burke's Library Technology Companion: A Basic Guide for Library Staff (New York: Neal-Schuman, 2001) might be useful to fill this gap at an introductory level, and Saffady's Introduction to Automation for Librarians, 4th ed. (Chicago: American Library Association, 1999) world be better for those interested in more detail. The final two sections, however, are the book's real strength, with a strong focus an management issues, and this content distinguishes it from other books an this topic such as Ferguson and Hebels Computers for Librarians: an Introduction to Systems and Applications (Waggawagga, NSW: Centre for Information Studies, Charles Sturt University, 1998). ...