Search (22 results, page 1 of 2)

0.042841177 = product of:
  0.10710294 = sum of:
    0.02060168 = product of:
      0.04120336 = sum of:
        0.04120336 = weight(_text_:problems in 2605) [ClassicSimilarity], result of:
          0.04120336 = score(doc=2605,freq=2.0), product of:
            0.15058853 = queryWeight, product of:
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.036484417 = queryNorm
            0.27361554 = fieldWeight in 2605, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.046875 = fieldNorm(doc=2605)
      0.5 = coord(1/2)
    0.086501256 = product of:
      0.17300251 = sum of:
        0.17300251 = weight(_text_:exercises in 2605) [ClassicSimilarity], result of:
          0.17300251 = score(doc=2605,freq=4.0), product of:
            0.25947425 = queryWeight, product of:
              7.11192 = idf(docFreq=97, maxDocs=44218)
              0.036484417 = queryNorm
            0.6667425 = fieldWeight in 2605, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              7.11192 = idf(docFreq=97, maxDocs=44218)
              0.046875 = fieldNorm(doc=2605)
      0.5 = coord(1/2)
  0.4 = coord(2/5)

Abstract

For introductory information retrieval courses at the undergraduate and graduate level in computer science, information science and computer engineering departments. Written by a leader in the field of information retrieval, Search Engines: Information Retrieval in Practice, is designed to give undergraduate students the understanding and tools they need to evaluate, compare and modify search engines. Coverage of the underlying IR and mathematical models reinforce key concepts. The book's numerous programming exercises make extensive use of Galago, a Java-based open source search engine. SUPPLEMENTS / Extensive lecture slides (in PDF and PPT format) / Solutions to selected end of chapter problems (Instructors only) / Test collections for exercises / Galago search engine

0.030142525 = product of:
  0.07535631 = sum of:
    0.012139657 = product of:
      0.024279313 = sum of:
        0.024279313 = weight(_text_:problems in 150) [ClassicSimilarity], result of:
          0.024279313 = score(doc=150,freq=4.0), product of:
            0.15058853 = queryWeight, product of:
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.036484417 = queryNorm
            0.1612295 = fieldWeight in 150, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.01953125 = fieldNorm(doc=150)
      0.5 = coord(1/2)
    0.06321666 = sum of:
      0.041812256 = weight(_text_:etc in 150) [ClassicSimilarity], result of:
        0.041812256 = score(doc=150,freq=4.0), product of:
          0.19761753 = queryWeight, product of:
            5.4164915 = idf(docFreq=533, maxDocs=44218)
            0.036484417 = queryNorm
          0.2115817 = fieldWeight in 150, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            5.4164915 = idf(docFreq=533, maxDocs=44218)
            0.01953125 = fieldNorm(doc=150)
      0.021404404 = weight(_text_:22 in 150) [ClassicSimilarity], result of:
        0.021404404 = score(doc=150,freq=6.0), product of:
          0.12776221 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.036484417 = 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)
  0.4 = coord(2/5)

Classification

006.7 22

Date

7. 3.2007 19:30:22

DDC

006.7 22

Footnote

Semantic web technologies are explained, and ontology representation is emphasized. There is an excellent summary of the fundamental theory behind applying a knowledge-engineering approach to vision problems. This summary represents the concept of the semantic web and multimedia content analysis. A definition of the fuzzy knowledge representation that can be used for realization in multimedia content applications has been provided, with a comprehensive analysis. The second part of the book introduces the multimedia content analysis approaches and applications. In addition, some examples of methods applicable to multimedia content analysis are presented. Multimedia content analysis is a very diverse field and concerns many other research fields at the same time; this creates strong diversity issues, as everything from low-level features (e.g., colors, DCT coefficients, motion vectors, etc.) up to the very high and semantic level (e.g., Object, Events, Tracks, etc.) are involved. The second part includes topics on structure identification (e.g., shot detection for video sequences), and object-based video indexing. These conventional analysis methods are supplemented by results on semantic multimedia analysis, including three detailed chapters on the development and use of knowledge models for automatic multimedia analysis. Starting from object-based indexing and continuing with machine learning, these three chapters are very logically organized. Because of the diversity of this research field, including several chapters of recent research results is not sufficient to cover the state of the art of multimedia. The editors of the book should write an introductory chapter about multimedia content analysis approaches, basic problems, and technical issues and challenges, and try to survey the state of the art of the field and thus introduce the field to the reader.

0.027255768 = product of:
  0.06813942 = sum of:
    0.017168067 = product of:
      0.034336135 = sum of:
        0.034336135 = weight(_text_:problems in 262) [ClassicSimilarity], result of:
          0.034336135 = score(doc=262,freq=2.0), product of:
            0.15058853 = queryWeight, product of:
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.036484417 = queryNorm
            0.22801295 = fieldWeight in 262, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.0390625 = fieldNorm(doc=262)
      0.5 = coord(1/2)
    0.05097135 = product of:
      0.1019427 = sum of:
        0.1019427 = weight(_text_:exercises in 262) [ClassicSimilarity], result of:
          0.1019427 = score(doc=262,freq=2.0), product of:
            0.25947425 = queryWeight, product of:
              7.11192 = idf(docFreq=97, maxDocs=44218)
              0.036484417 = queryNorm
            0.39288178 = fieldWeight in 262, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              7.11192 = idf(docFreq=97, maxDocs=44218)
              0.0390625 = fieldNorm(doc=262)
      0.5 = coord(1/2)
  0.4 = coord(2/5)

Abstract

The Architecture of Cyberspace is aimed at students taking information management as a minor in their course as well as those who manage document collections but who are not professional librarians. The first part of this book looks at how users find documents and the problems they have; the second part discusses how to manage the information space using various tools such as classification and controlled vocabularies. It also explores the general issues of publishing, including legal considerations, as well the main issues of creating and managing archives. Supported by exercises and discussion questions at the end of each chapter, the book includes some sample assignments suitable for use with students of this subject. A glossary is also provided to help readers understand the specialised vocabulary and the key concepts in the design and assessment of information spaces.

0.014484189 = product of:
  0.07242095 = sum of:
    0.07242095 = product of:
      0.1448419 = sum of:
        0.1448419 = weight(_text_:etc in 6) [ClassicSimilarity], result of:
          0.1448419 = score(doc=6,freq=12.0), product of:
            0.19761753 = queryWeight, product of:
              5.4164915 = idf(docFreq=533, maxDocs=44218)
              0.036484417 = queryNorm
            0.7329405 = fieldWeight in 6, product of:
              3.4641016 = tf(freq=12.0), with freq of:
                12.0 = termFreq=12.0
              5.4164915 = idf(docFreq=533, maxDocs=44218)
              0.0390625 = fieldNorm(doc=6)
      0.5 = coord(1/2)
  0.2 = coord(1/5)

LCSH

Google / Handbooks, manuals, etc.
Web search engines / Handbooks, manuals, etc.
Internet searching / Handbooks, manuals, etc.

Subject

Google / Handbooks, manuals, etc.
Web search engines / Handbooks, manuals, etc.
Internet searching / Handbooks, manuals, etc.

0.013627884 = product of:
  0.03406971 = sum of:
    0.008584034 = product of:
      0.017168067 = sum of:
        0.017168067 = weight(_text_:problems in 636) [ClassicSimilarity], result of:
          0.017168067 = score(doc=636,freq=2.0), product of:
            0.15058853 = queryWeight, product of:
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.036484417 = queryNorm
            0.114006475 = fieldWeight in 636, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.01953125 = fieldNorm(doc=636)
      0.5 = coord(1/2)
    0.025485676 = product of:
      0.05097135 = sum of:
        0.05097135 = weight(_text_:exercises in 636) [ClassicSimilarity], result of:
          0.05097135 = score(doc=636,freq=2.0), product of:
            0.25947425 = queryWeight, product of:
              7.11192 = idf(docFreq=97, maxDocs=44218)
              0.036484417 = queryNorm
            0.19644089 = fieldWeight in 636, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              7.11192 = idf(docFreq=97, maxDocs=44218)
              0.01953125 = fieldNorm(doc=636)
      0.5 = coord(1/2)
  0.4 = coord(2/5)

Footnote

Rez. in: JASIST 58(2007) no.6, S.910-911 (J.L. Vicedo u. J. Gomez): "The Text REtrieval Conference (TREC) is a yearly workshop hosted by the U.S. government's National Institute of Standards and Technology (NIST) that fosters and supports research in information retrieval as well as speeding the transfer of technology between research labs and industry. Since 1992, TREC has provided the infrastructure necessary for large-scale evaluations of different text retrieval methodologies. TREC impact has been very important and its success has been mainly supported by its continuous adaptation to the emerging information retrieval needs. Not in vain, TREC has built evaluation benchmarks for more than 20 different retrieval problems such as Web retrieval, speech retrieval, or question-answering. The large and intense trajectory of annual TREC conferences has resulted in an immense bulk of documents reflecting the different eval uation and research efforts developed. This situation makes it difficult sometimes to observe clearly how research in information retrieval (IR) has evolved over the course of TREC. TREC: Experiment and Evaluation in Information Retrieval succeeds in organizing and condensing all this research into a manageable volume that describes TREC history and summarizes the main lessons learned. The book is organized into three parts. The first part is devoted to the description of TREC's origin and history, the test collections, and the evaluation methodology developed. The second part describes a selection of the major evaluation exercises (tracks), and the third part contains contributions from research groups that had a large and remarkable participation in TREC. Finally, Karen Spark Jones, one of the main promoters of research in IR, closes the book with an epilogue that analyzes the impact of TREC on this research field.

0.01003494 = product of:
  0.050174702 = sum of:
    0.050174702 = product of:
      0.100349404 = sum of:
        0.100349404 = weight(_text_:etc in 3185) [ClassicSimilarity], result of:
          0.100349404 = score(doc=3185,freq=4.0), product of:
            0.19761753 = queryWeight, product of:
              5.4164915 = idf(docFreq=533, maxDocs=44218)
              0.036484417 = queryNorm
            0.50779605 = fieldWeight in 3185, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              5.4164915 = idf(docFreq=533, maxDocs=44218)
              0.046875 = fieldNorm(doc=3185)
      0.5 = coord(1/2)
  0.2 = coord(1/5)

LCSH

Internet searching / Handbooks, manuals, etc

Subject

Internet searching / Handbooks, manuals, etc

0.008155417 = product of:
  0.040777083 = sum of:
    0.040777083 = product of:
      0.08155417 = sum of:
        0.08155417 = weight(_text_:exercises in 3346) [ClassicSimilarity], result of:
          0.08155417 = score(doc=3346,freq=2.0), product of:
            0.25947425 = queryWeight, product of:
              7.11192 = idf(docFreq=97, maxDocs=44218)
              0.036484417 = queryNorm
            0.31430542 = fieldWeight in 3346, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              7.11192 = idf(docFreq=97, maxDocs=44218)
              0.03125 = fieldNorm(doc=3346)
      0.5 = coord(1/2)
  0.2 = coord(1/5)

Abstract

The World Wide Web is rapidly filling with more text than anyone could have imagined even a short time ago, but the task of isolating relevant parts of this vast information has become just that much more daunting. Richard Belew brings a cognitive perspective to the study of information retrieval as a discipline within computer science. He introduces the idea of Finding Out About (FDA) as the process of actively seeking out information relevant to a topic of interest and describes its many facets - ranging from creating a good characterization of what the user seeks, to what documents actually mean, to methods of inferring semantic clues about each document, to the problem of evaluating whether our search engines are performing as we have intended. Finding Out About explains how to build the tools that are useful for searching collections of text and other media. In the process it takes a close look at the properties of textual documents that do not become clear until very large collections of them are brought together and shows that the construction of effective search engines requires knowledge of the statistical and mathematical properties of linguistic phenomena, as well as an appreciation for the cognitive foundation we bring to the task as language users. The unique approach of this book is its even handling of the phenomena of both numbers and words, making it accessible to a wide audience. The textbook is usable in both undergraduate and graduate classes on information retrieval, library science, and computational linguistics. The text is accompanied by a CD-ROM that contains a hypertext version of the book, including additional topics and notes not present in the printed edition. In addition, the CD contains the full text of C.J. "Keith" van Rijsbergen's famous textbook, Information Retrieval (now out of print). Many active links from Belew's to van Rijsbergen's hypertexts help to unite the material. Several test corpora and indexing tools are provided, to support the design of your own search engine. Additional exercises using these corpora and code are available to instructors. Also supporting this book is a Web site that will include recent additions to the book, as well as links to sites of new topics and methods.

0.0047241445 = product of:
  0.011810361 = sum of:
    0.0068672267 = product of:
      0.013734453 = sum of:
        0.013734453 = weight(_text_:problems in 1789) [ClassicSimilarity], result of:
          0.013734453 = score(doc=1789,freq=2.0), product of:
            0.15058853 = queryWeight, product of:
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.036484417 = queryNorm
            0.09120518 = fieldWeight in 1789, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.015625 = fieldNorm(doc=1789)
      0.5 = coord(1/2)
    0.0049431347 = product of:
      0.009886269 = sum of:
        0.009886269 = weight(_text_:22 in 1789) [ClassicSimilarity], result of:
          0.009886269 = score(doc=1789,freq=2.0), product of:
            0.12776221 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.036484417 = queryNorm
            0.07738023 = fieldWeight in 1789, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.015625 = fieldNorm(doc=1789)
      0.5 = coord(1/2)
  0.4 = coord(2/5)

Date

23. 3.2008 19:10:22

Footnote

Rez. in: JASIST 54(2003) no.9, S.905-906 (C.A. Badurek): "Visual approaches for knowledge discovery in very large databases are a prime research need for information scientists focused an extracting meaningful information from the ever growing stores of data from a variety of domains, including business, the geosciences, and satellite and medical imagery. This work presents a summary of research efforts in the fields of data mining, knowledge discovery, and data visualization with the goal of aiding the integration of research approaches and techniques from these major fields. The editors, leading computer scientists from academia and industry, present a collection of 32 papers from contributors who are incorporating visualization and data mining techniques through academic research as well application development in industry and government agencies. Information Visualization focuses upon techniques to enhance the natural abilities of humans to visually understand data, in particular, large-scale data sets. It is primarily concerned with developing interactive graphical representations to enable users to more intuitively make sense of multidimensional data as part of the data exploration process. It includes research from computer science, psychology, human-computer interaction, statistics, and information science. Knowledge Discovery in Databases (KDD) most often refers to the process of mining databases for previously unknown patterns and trends in data. Data mining refers to the particular computational methods or algorithms used in this process. The data mining research field is most related to computational advances in database theory, artificial intelligence and machine learning. This work compiles research summaries from these main research areas in order to provide "a reference work containing the collection of thoughts and ideas of noted researchers from the fields of data mining and data visualization" (p. 8). It addresses these areas in three main sections: the first an data visualization, the second an KDD and model visualization, and the last an using visualization in the knowledge discovery process. The seven chapters of Part One focus upon methodologies and successful techniques from the field of Data Visualization. Hoffman and Grinstein (Chapter 2) give a particularly good overview of the field of data visualization and its potential application to data mining. An introduction to the terminology of data visualization, relation to perceptual and cognitive science, and discussion of the major visualization display techniques are presented. Discussion and illustration explain the usefulness and proper context of such data visualization techniques as scatter plots, 2D and 3D isosurfaces, glyphs, parallel coordinates, and radial coordinate visualizations. Remaining chapters present the need for standardization of visualization methods, discussion of user requirements in the development of tools, and examples of using information visualization in addressing research problems.

0.0041392017 = product of:
  0.020696009 = sum of:
    0.020696009 = product of:
      0.041392017 = sum of:
        0.041392017 = weight(_text_:etc in 4515) [ClassicSimilarity], result of:
          0.041392017 = score(doc=4515,freq=2.0), product of:
            0.19761753 = queryWeight, product of:
              5.4164915 = idf(docFreq=533, maxDocs=44218)
              0.036484417 = queryNorm
            0.20945519 = fieldWeight in 4515, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.4164915 = idf(docFreq=533, maxDocs=44218)
              0.02734375 = fieldNorm(doc=4515)
      0.5 = coord(1/2)
  0.2 = coord(1/5)

Abstract

The main purpose of this book is to sum up the vital and highly topical research issue of knowledge representation on the Web and to discuss novel solutions by combining benefits of folksonomies and Web 2.0 approaches with ontologies and semantic technologies. This book contains an overview of knowledge representation approaches in past, present and future, introduction to ontologies, Web indexing and in first case the novel approaches of developing ontologies. This title combines aspects of knowledge representation for both the Semantic Web (ontologies) and the Web 2.0 (folksonomies). Currently there is no monographic book which provides a combined overview over these topics. focus on the topic of using knowledge representation methods for document indexing purposes. For this purpose, considerations from classical librarian interests in knowledge representation (thesauri, classification schemes etc.) are included, which are not part of most other books which have a stronger background in computer science.

0.0041203364 = product of:
  0.02060168 = sum of:
    0.02060168 = product of:
      0.04120336 = sum of:
        0.04120336 = weight(_text_:problems in 5777) [ClassicSimilarity], result of:
          0.04120336 = score(doc=5777,freq=2.0), product of:
            0.15058853 = queryWeight, product of:
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.036484417 = queryNorm
            0.27361554 = fieldWeight in 5777, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.046875 = fieldNorm(doc=5777)
      0.5 = coord(1/2)
  0.2 = coord(1/5)

Abstract

This book discusses many of the key design issues for building search engines and emphazises the important role that applied mathematics can play in improving information retrieval. The authors discuss not only important data structures, algorithms, and software but also user-centered issues such as interfaces, manual indexing, and document preparation. They also present some of the current problems in information retrieval that many not be familiar to applied mathematicians and computer scientists and some of the driving computational methods (SVD, SDD) for automated conceptual indexing

0.0034336136 = product of:
  0.017168067 = sum of:
    0.017168067 = product of:
      0.034336135 = sum of:
        0.034336135 = weight(_text_:problems in 0) [ClassicSimilarity], result of:
          0.034336135 = score(doc=0,freq=2.0), product of:
            0.15058853 = queryWeight, product of:
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.036484417 = queryNorm
            0.22801295 = fieldWeight in 0, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.0390625 = fieldNorm(doc=0)
      0.5 = coord(1/2)
  0.2 = coord(1/5)

Abstract

As information becomes more ubiquitous and the demands that searchers have on search systems grow, there is a need to support search behaviors beyond simple lookup. Information seeking is the process or activity of attempting to obtain information in both human and technological contexts. Exploratory search describes an information-seeking problem context that is open-ended, persistent, and multifaceted, and information-seeking processes that are opportunistic, iterative, and multitactical. Exploratory searchers aim to solve complex problems and develop enhanced mental capacities. Exploratory search systems support this through symbiotic human-machine relationships that provide guidance in exploring unfamiliar information landscapes. Exploratory search has gained prominence in recent years. There is an increased interest from the information retrieval, information science, and human-computer interaction communities in moving beyond the traditional turn-taking interaction model supported by major Web search engines, and toward support for human intelligence amplification and information use. In this lecture, we introduce exploratory search, relate it to relevant extant research, outline the features of exploratory search systems, discuss the evaluation of these systems, and suggest some future directions for supporting exploratory search. Exploratory search is a new frontier in the search domain and is becoming increasingly important in shaping our future world.

0.002965881 = product of:
  0.014829405 = sum of:
    0.014829405 = product of:
      0.02965881 = sum of:
        0.02965881 = weight(_text_:22 in 1781) [ClassicSimilarity], result of:
          0.02965881 = score(doc=1781,freq=2.0), product of:
            0.12776221 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.036484417 = queryNorm
            0.23214069 = fieldWeight in 1781, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046875 = fieldNorm(doc=1781)
      0.5 = coord(1/2)
  0.2 = coord(1/5)

Date

22. 3.2008 14:35:21

0.0029135176 = product of:
  0.0145675875 = sum of:
    0.0145675875 = product of:
      0.029135175 = sum of:
        0.029135175 = weight(_text_:problems in 6) [ClassicSimilarity], result of:
          0.029135175 = score(doc=6,freq=4.0), product of:
            0.15058853 = queryWeight, product of:
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.036484417 = queryNorm
            0.1934754 = fieldWeight in 6, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.0234375 = fieldNorm(doc=6)
      0.5 = coord(1/2)
  0.2 = coord(1/5)

Content

Inhalt: Chapter 1. Introduction to Web Search Engines: 1.1 A Short History of Information Retrieval - 1.2 An Overview of Traditional Information Retrieval - 1.3 Web Information Retrieval Chapter 2. Crawling, Indexing, and Query Processing: 2.1 Crawling - 2.2 The Content Index - 2.3 Query Processing Chapter 3. Ranking Webpages by Popularity: 3.1 The Scene in 1998 - 3.2 Two Theses - 3.3 Query-Independence Chapter 4. The Mathematics of Google's PageRank: 4.1 The Original Summation Formula for PageRank - 4.2 Matrix Representation of the Summation Equations - 4.3 Problems with the Iterative Process - 4.4 A Little Markov Chain Theory - 4.5 Early Adjustments to the Basic Model - 4.6 Computation of the PageRank Vector - 4.7 Theorem and Proof for Spectrum of the Google Matrix Chapter 5. Parameters in the PageRank Model: 5.1 The a Factor - 5.2 The Hyperlink Matrix H - 5.3 The Teleportation Matrix E Chapter 6. The Sensitivity of PageRank; 6.1 Sensitivity with respect to alpha - 6.2 Sensitivity with respect to H - 6.3 Sensitivity with respect to vT - 6.4 Other Analyses of Sensitivity - 6.5 Sensitivity Theorems and Proofs Chapter 7. The PageRank Problem as a Linear System: 7.1 Properties of (I - alphaS) - 7.2 Properties of (I - alphaH) - 7.3 Proof of the PageRank Sparse Linear System Chapter 8. Issues in Large-Scale Implementation of PageRank: 8.1 Storage Issues - 8.2 Convergence Criterion - 8.3 Accuracy - 8.4 Dangling Nodes - 8.5 Back Button Modeling
Chapter 9. Accelerating the Computation of PageRank: 9.1 An Adaptive Power Method - 9.2 Extrapolation - 9.3 Aggregation - 9.4 Other Numerical Methods Chapter 10. Updating the PageRank Vector: 10.1 The Two Updating Problems and their History - 10.2 Restarting the Power Method - 10.3 Approximate Updating Using Approximate Aggregation - 10.4 Exact Aggregation - 10.5 Exact vs. Approximate Aggregation - 10.6 Updating with Iterative Aggregation - 10.7 Determining the Partition - 10.8 Conclusions Chapter 11. The HITS Method for Ranking Webpages: 11.1 The HITS Algorithm - 11.2 HITS Implementation - 11.3 HITS Convergence - 11.4 HITS Example - 11.5 Strengths and Weaknesses of HITS - 11.6 HITS's Relationship to Bibliometrics - 11.7 Query-Independent HITS - 11.8 Accelerating HITS - 11.9 HITS Sensitivity Chapter 12. Other Link Methods for Ranking Webpages: 12.1 SALSA - 12.2 Hybrid Ranking Methods - 12.3 Rankings based on Traffic Flow Chapter 13. The Future of Web Information Retrieval: 13.1 Spam - 13.2 Personalization - 13.3 Clustering - 13.4 Intelligent Agents - 13.5 Trends and Time-Sensitive Search - 13.6 Privacy and Censorship - 13.7 Library Classification Schemes - 13.8 Data Fusion Chapter 14. Resources for Web Information Retrieval: 14.1 Resources for Getting Started - 14.2 Resources for Serious Study Chapter 15. The Mathematics Guide: 15.1 Linear Algebra - 15.2 Perron-Frobenius Theory - 15.3 Markov Chains - 15.4 Perron Complementation - 15.5 Stochastic Complementation - 15.6 Censoring - 15.7 Aggregation - 15.8 Disaggregation

0.0024715676 = product of:
  0.0123578375 = sum of:
    0.0123578375 = product of:
      0.024715675 = sum of:
        0.024715675 = weight(_text_:22 in 1397) [ClassicSimilarity], result of:
          0.024715675 = score(doc=1397,freq=2.0), product of:
            0.12776221 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.036484417 = queryNorm
            0.19345059 = fieldWeight in 1397, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0390625 = fieldNorm(doc=1397)
      0.5 = coord(1/2)
  0.2 = coord(1/5)

Date

22. 3.2008 14:29:25

0.0024715676 = product of:
  0.0123578375 = sum of:
    0.0123578375 = product of:
      0.024715675 = sum of:
        0.024715675 = weight(_text_:22 in 1708) [ClassicSimilarity], result of:
          0.024715675 = score(doc=1708,freq=2.0), product of:
            0.12776221 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.036484417 = queryNorm
            0.19345059 = fieldWeight in 1708, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0390625 = fieldNorm(doc=1708)
      0.5 = coord(1/2)
  0.2 = coord(1/5)

Date

22. 3.2008 16:15:37

0.0023652583 = product of:
  0.011826291 = sum of:
    0.011826291 = product of:
      0.023652581 = sum of:
        0.023652581 = weight(_text_:etc in 92) [ClassicSimilarity], result of:
          0.023652581 = score(doc=92,freq=2.0), product of:
            0.19761753 = queryWeight, product of:
              5.4164915 = idf(docFreq=533, maxDocs=44218)
              0.036484417 = queryNorm
            0.11968868 = fieldWeight in 92, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.4164915 = idf(docFreq=533, maxDocs=44218)
              0.015625 = fieldNorm(doc=92)
      0.5 = coord(1/2)
  0.2 = coord(1/5)

Footnote

Chu's intent with this book is clear throughout the entire text. With this presentation, she writes with the novice in mind or as she puls it in the Preface, "to anyone who is interested in learning about the field, particularly those who are new to it." After reading the text, I found that this book is also an appropriate reference book for those who are somewhat advanced in the field. I found the chapters an information retrieval models and techniques, metadata, and AI very informative in that they contain information that is often rather densely presented in other texts. Although, I must say, the metadata section in Chapter 3 is pretty basic and contains more questions about the area than information. . . . It is an excellent book to have in the classroom, an your bookshelf, etc. It reads very well and is written with the reader in mind. If you are in need of a more advanced or technical text an the subject, this is not the book for you. But, if you are looking for a comprehensive, manual that can be used as a "flip-through," then you are in luck."

0.001977254 = product of:
  0.009886269 = sum of:
    0.009886269 = product of:
      0.019772539 = sum of:
        0.019772539 = weight(_text_:22 in 2249) [ClassicSimilarity], result of:
          0.019772539 = score(doc=2249,freq=2.0), product of:
            0.12776221 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.036484417 = queryNorm
            0.15476047 = fieldWeight in 2249, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03125 = fieldNorm(doc=2249)
      0.5 = coord(1/2)
  0.2 = coord(1/5)

Date

22. 3.2008 18:05:16

0.001977254 = product of:
  0.009886269 = sum of:
    0.009886269 = product of:
      0.019772539 = sum of:
        0.019772539 = weight(_text_:22 in 2426) [ClassicSimilarity], result of:
          0.019772539 = score(doc=2426,freq=2.0), product of:
            0.12776221 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.036484417 = queryNorm
            0.15476047 = fieldWeight in 2426, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03125 = fieldNorm(doc=2426)
      0.5 = coord(1/2)
  0.2 = coord(1/5)

0.001977254 = product of:
  0.009886269 = sum of:
    0.009886269 = product of:
      0.019772539 = sum of:
        0.019772539 = weight(_text_:22 in 2428) [ClassicSimilarity], result of:
          0.019772539 = score(doc=2428,freq=2.0), product of:
            0.12776221 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.036484417 = queryNorm
            0.15476047 = fieldWeight in 2428, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03125 = fieldNorm(doc=2428)
      0.5 = coord(1/2)
  0.2 = coord(1/5)

0.0019423452 = product of:
  0.009711726 = sum of:
    0.009711726 = product of:
      0.019423451 = sum of:
        0.019423451 = weight(_text_:problems in 1796) [ClassicSimilarity], result of:
          0.019423451 = score(doc=1796,freq=4.0), product of:
            0.15058853 = queryWeight, product of:
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.036484417 = queryNorm
            0.1289836 = fieldWeight in 1796, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              4.1274753 = idf(docFreq=1937, maxDocs=44218)
              0.015625 = fieldNorm(doc=1796)
      0.5 = coord(1/2)
  0.2 = coord(1/5)

Footnote

Rez. in: JASIST 55(2004) no.11, S.1025-1026 (D.E. Agosto): ""Did you ever feel as though the Internet has caused you to lose control of your library?" So begins the introduction to this volume of over 50 articles, essays, library policies, and other documents from a variety of sources, most of which are library journals aimed at practitioners. Volume editor Block has a long history of library service as well as an active career as an online journalist. From 1977 to 1999 she was the Associate Director of Public Services at the St. Ambrose University library in Davenport, Iowa. She was also a Fox News Online weekly columnist from 1998 to 2000. She currently writes for and publishes the weekly ezine Exlibris, which focuses an the use of computers, the Internet, and digital databases to improve library services. Despite the promising premise of this book, the final product is largely a disappointment because of the superficial coverage of its issues. A listing of the most frequently represented sources serves to express the general level and style of the entries: nine articles are reprinted from Computers in Libraries, five from Library Journal, four from Library Journal NetConnect, four from ExLibris, four from American Libraries, three from College & Research Libraries News, two from Online, and two from The Chronicle of Higher Education. Most of the authors included contributed only one item, although Roy Tennant (manager of the California Digital Library) authored three of the pieces, and Janet L. Balas (library information systems specialist at the Monroeville Public Library in Pennsylvania) and Karen G. Schneider (coordinator of lii.org, the Librarians' Index to the Internet) each wrote two. Volume editor Block herself wrote six of the entries, most of which have been reprinted from ExLibris. Reading the volume is muck like reading an issue of one of these journals-a pleasant experience that discusses issues in the field without presenting much research. Net Effects doesn't offer much in the way of theory or research, but then again it doesn't claim to. Instead, it claims to be an "idea book" (p. 5) with practical solutions to Internet-generated library problems. While the idea is a good one, little of the material is revolutionary or surprising (or even very creative), and most of the solutions offered will already be familiar to most of the book's intended audience.
Unlike muck of the professional library literature, Net Effects is not an open-aimed embrace of technology. Block even suggests that it is helpful to have a Luddite or two an each library staff to identify the setbacks associated with technological advances in the library. Each of the book's 10 chapters deals with one Internet-related problem, such as "Chapter 4-The Shifted Librarian: Adapting to the Changing Expectations of Our Wired (and Wireless) Users," or "Chapter 8-Up to Our Ears in Lawyers: Legal Issues Posed by the Net." For each of these 10 problems, multiple solutions are offered. For example, for "Chapter 9-Disappearing Data," four solutions are offered. These include "Link-checking," "Have a technological disaster plan," "Advise legislators an the impact proposed laws will have," and "Standards for preservation of digital information." One article is given to explicate each of these four solutions. A short bibliography of recommended further reading is also included for each chapter. Block provides a short introduction to each chapter, and she comments an many of the entries. Some of these comments seem to be intended to provide a research basis for the proposed solutions, but they tend to be vague generalizations without citations, such as, "We know from research that students would rather ask each other for help than go to adults. We can use that (p. 91 )." The original publication dates of the entries range from 1997 to 2002, with the bulk falling into the 2000-2002 range. At up to 6 years old, some of the articles seem outdated, such as a 2000 news brief announcing the creation of the first "customizable" public library Web site (www.brarydog.net). These critiques are not intended to dismiss the volume entirely. Some of the entries are likely to find receptive audiences, such as a nuts-and-bolts instructive article for making Web sites accessible to people with disabilities. "Providing Equitable Access," by Cheryl H. Kirkpatrick and Catherine Buck Morgan, offers very specific instructions, such as how to renovate OPAL workstations to suit users with "a wide range of functional impairments." It also includes a useful list of 15 things to do to make a Web site readable to most people with disabilities, such as, "You can use empty (alt) tags (alt="') for images that serve a purely decorative function. Screen readers will skip empty (alt) tags" (p. 157). Information at this level of specificity can be helpful to those who are faced with creating a technological solution for which they lack sufficient technical knowledge or training.