Search (78 results, page 4 of 4)

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Abstract

We determine analytically the modulus of the second eigenvalue for the web hyperlink matrix used by Google for computing PageRank. Specifically, we prove the following statement: "For any matrix A=(cP + (1-c)E)**T, where P is an nxn row-stochasticmatrix, E is a nonnegative nxn rank-one row-stochastic matrix, and 0<=c<=1, the second eigenvalue of A has modulus Betrag (Lambda_sub2)<=c. Furthermore, if P has at least two irreducible closed subsets, the second eigenvalue Lambda_sub2 = c." This statement has implications for the convergence rate of the standard PageRank algorithm as the web scales, for the stability of PageRank to perturbations to the link structure of the web, for the detection of Google spammers, and for the design of algorithms to speed up PageRank.

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Isbn

0-7123-3211-1

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Abstract

Describes phase 2 of the project. Aimed to develop the prototype CIDA further, incorporating the recommendations made by the evaluators of the system during phase 1 and to undertake additional evaluation once changes had been made. Specific objectives were: to enhance the user interface of the prototype in accordance with evaluators' recommendations; to refine the system advice; to field test the system in anorganization where online company information searching is frequently undertaken; and to compare the accuracy and efficiency of the prototype to that of manual directories giving details of online company databases

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Date

1. 4.1998 20:21:38

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Date

1. 4.1998 20:21:38

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Isbn

1-85739-221-3

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Date

1. 4.1998 20:21:38

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Date

1. 6.2010 16:35:41

Series

Europeana white paper; 1

Source

http://www.scribd.com/doc/32110457/Europeana-White-Paper-1

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Abstract

Describes the work of the ABDUX project, containing a brief description of the rationale for using X.500 for access to bibliographic information. Outlines the project's design work and a demonstration system. Reviews the standards applicable to bibliographic data and library OPACs. Highlights difficulties found when handling bibliographic data in library systems. Discusses the service requirements of OPACs for accessing bibliographic, discussing how X.500 Directory services may be used. Suggests the DIT structures that coulb be used for storing both bibliographic information and descriptions on information resources in general in the directory. Describes the way in which the model of bibliographic data is presented. Outlines the syntax of ASN.1 and how records and fields may be described in terms of X.500 object classes and attribute types. Details the mapping of MARC format into an X.500 compatible form. Provides the schema information for representing research notes and archives, not covered by MARC definitions. Examines the success in implementing the designs and loos ahead to future possibilities

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Isbn

0-948848-73-1

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Date

1. 4.1998 20:21:38

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Abstract

Describes the ELINOR (Electronic Library INformation Online Retrieval) Electronic Library Project, at De Montfort University, UK, which aims to convert library primary materials and course documents to electronic form and to make the full text documents accessible to teaching staff and students in an electronic workstation environment. This pilot phase of the ELINOR Electronic Library Project demonstrated the feasibility of collecting electronic documents for 1 undergraduate course, BA/BSc Business Information Systems (BIS), and the benefits of optical character recognition (OCR) and scanning and document image processing (DIP) techniques in a client server environment. A key feature of the project was the negotiation of short term licences from 11 publishers for 53 textbooks. Publishers were prepared to participate in the project to provide useful early experience in copyright management on small scale

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Isbn

1-880124-36-X

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Content

The Library is consulting with stakeholders concerning the potential impact of these proposals. No firm decisions have yet been taken regarding either of these standards. FAST 1. The British Library proposes to adopt FAST selectively to extend the scope of subject indexing of current and legacy content. 2. The British Library proposes to implement FAST as a replacement for LCSH in all current cataloguing, subject to mitigation of the risks identified above, in particular the question of sustainability. DDC 3. The British Library proposes to implement Abridged DDC selectively to extend the scope of subject indexing of current and legacy content.

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Date

1. 4.1998 20:21:38

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Abstract

After a short outline of problems, possibilities and difficulties of systematic information retrieval on the Internet and a description of efforts for development in this area, a specification of the terminology for this report is required. Although the process of retrieval is generally seen as an iterative process of browsing and information retrieval and several important services on the net have taken this fact into consideration, the emphasis of this report lays on the general retrieval tools for the whole of Internet. In order to be able to evaluate the differences, possibilities and restrictions of the different services it is necessary to begin with organizing the existing varieties in a typological/ taxonomical survey. The possibilities and weaknesses will be briefly compared and described for the most important services in the categories robot-based WWW-catalogues of different types, list- or form-based catalogues and simultaneous or collected search services respectively. It will however for different reasons not be possible to rank them in order of "best" services. Still more important are the weaknesses and problems common for all attempts of indexing the Internet. The problems of the quality of the input, the technical performance and the general problem of indexing virtual hypertext are shown to be at least as difficult as the different aspects of harvesting, indexing and information retrieval. Some of the attempts made in the area of further development of retrieval services will be mentioned in relation to descriptions of the contents of documents and standardization efforts. Internet harvesting and indexing technology and retrieval software is thoroughly reviewed. Details about all services and software are listed in analytical forms in Annex 1-3.

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Abstract

Finding particular documents after they have been reviewed and stored has been a challenge since the advent of the printed word. "Findability" is emphatically more important as we deal with information overload in general and with the specific need to quickly find relevant background information to support business decisions in a networked environment. Because time is arguably the most valuable asset in today's economy, information users value tools that help them (1) quickly find the information they are seeking and (2) manage the quantity and quality of information they manipulate and work with on a regular basis. Although the term "indexing" may lack the cachet of some other terms we use to describe current information organization and management concepts, indexing is fundamental to precise information organization and retrieval, especially when dealing with large sets of documents. Power users find great value in using a known, granular indexing language that can surface the most relevant items and filter out items of peripheral or no interest. Web architects and interface designers can likewise take advantage of indexing labels to present only the information meeting certain requirements for users who do not wish to learn the indexing structure or taxonomy. The user finds what is needed while the indexing language is used behind the scenes and is transparent to the user.

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Date

1. 6.2012 18:49:47