Search (382 results, page 1 of 20)

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Footnote

Rez. in: Philosophisch-ethische Rezensionen vom 09.11.2019 (Jürgen Czogalla), Unter: https://philosophisch-ethische-rezensionen.de/rezension/Goedert1.html. In: B.I.T. online 23(2020) H.3, S.345-347 (W. Sühl-Strohmenger) [Unter: https%3A%2F%2Fwww.b-i-t-online.de%2Fheft%2F2020-03-rezensionen.pdf&usg=AOvVaw0iY3f_zNcvEjeZ6inHVnOK]. In: Open Password Nr. 805 vom 14.08.2020 (H.-C. Hobohm) [Unter: https://www.password-online.de/?mailpoet_router&endpoint=view_in_browser&action=view&data=WzE0MywiOGI3NjZkZmNkZjQ1IiwwLDAsMTMxLDFd].

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Footnote

Rez. in: Link-up 12(1995) no.2, S.8-9 (L.J. Brown)

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Date

22.10.2006 10:22:33

Footnote

Rez. in: nfd 54(2003) H.8, S.497 (T. Mandl): "Gesetze der digitalen Anarchie - Hyperlinks im Internet entstehen als Ergebnis sozialer Prozesse und können auch als formaler Graph im Sinne der Mathematik interpretiert werden. Die Thematik Hyperlinks ist im Information Retrieval höchst aktuell, da Suchmaschinen die Link-Struktur bei der Berechnung ihrer Ergebnisse berücksichtigen. Algorithmen zur Bestimmung des "guten Rufs" einer Seite wie etwa PageRank von Google gewichten eine Seite höher, wenn viele links auf sie verweisen. Zu den neuesten Erkenntnissen über die Netzwerkstruktur des Internets liegen zwei sehr gut lesbare Bücher vor. Der Autor des ersten Buchs, der Wirtschaftswissenschaftler Huberman, ist Leiter einer Forschungsabteilung bei Hewlett Packard. Huberman beschreibt in seinem Buch zunächst die Geschichte des Internet als technologische Revolution und gelangt dann schnell zu dessen Evolution und den darin vorherrschenden Wahrscheinlichkeitsverteilungen. Oberraschenderweise treten im Internet häufig power-law Wahrscheinlichkeitsverteilungen auf, die der Zipf'schen Verteilung ähneln. Auf diese sehr ungleichen Aufteilungen etwa von eingehenden HypertextLinks oder Surfern pro Seite im Internet bezieht sich der Titel des Buchs. Diese immer wieder auftretenden Wahrscheinlichkeitsverteilungen scheinen geradezu ein Gesetz des Internet zu bilden. So gibt es z.B. viele Sites mit sehr wenigen Seiten und einige wenige mit Millionen von Seiten, manche Seiten werden selten besucht und andere ziehen einen Großteil des Internet-Verkehrs auf sich, auf die meisten Seiten verweisen sehr wenige Links während auf einige wenige populäre Seiten Millionen von Links zielen. Das vorletzte Kapitel widmen übrigens beide Autoren den Märkten im Internet. Spätestens hier werden die wirtschaftlichen Aspekte von Netzwerken deutlich. Beide Titel führen den Leser in die neue Forschung zur Struktur des Internet als Netzwerk und sind leicht lesbar. Beides sind wissenschaftliche Bücher, wenden sich aber auch an den interessierten Laien. Das Buch von Barabási ist etwas aktueller, plauderhafter, länger, umfassender und etwas populärwissenschaftlicher."

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Abstract

With the proliferation of huge amounts of (heterogeneous) data on the Web, the importance of information retrieval (IR) has grown considerably over the last few years. Big players in the computer industry, such as Google, Microsoft and Yahoo!, are the primary contributors of technology for fast access to Web-based information; and searching capabilities are now integrated into most information systems, ranging from business management software and customer relationship systems to social networks and mobile phone applications. Ceri and his co-authors aim at taking their readers from the foundations of modern information retrieval to the most advanced challenges of Web IR. To this end, their book is divided into three parts. The first part addresses the principles of IR and provides a systematic and compact description of basic information retrieval techniques (including binary, vector space and probabilistic models as well as natural language search processing) before focusing on its application to the Web. Part two addresses the foundational aspects of Web IR by discussing the general architecture of search engines (with a focus on the crawling and indexing processes), describing link analysis methods (specifically Page Rank and HITS), addressing recommendation and diversification, and finally presenting advertising in search (the main source of revenues for search engines). The third and final part describes advanced aspects of Web search, each chapter providing a self-contained, up-to-date survey on current Web research directions. Topics in this part include meta-search and multi-domain search, semantic search, search in the context of multimedia data, and crowd search. The book is ideally suited to courses on information retrieval, as it covers all Web-independent foundational aspects. Its presentation is self-contained and does not require prior background knowledge. It can also be used in the context of classic courses on data management, allowing the instructor to cover both structured and unstructured data in various formats. Its classroom use is facilitated by a set of slides, which can be downloaded from www.search-computing.org.

Date

16.10.2013 19:22:44

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Abstract

Metadata is a key aspect of our evolving infrastructure for information management, social computing, and scientific collaboration. DC-2008 will focus on metadata challenges, solutions, and innovation in initiatives and activities underlying semantic and social applications. Metadata is part of the fabric of social computing, which includes the use of wikis, blogs, and tagging for collaboration and participation. Metadata also underlies the development of semantic applications, and the Semantic Web - the representation and integration of multimedia knowledge structures on the basis of semantic models. These two trends flow together in applications such as Wikipedia, where authors collectively create structured information that can be extracted and used to enhance access to and use of information sources. Recent discussion has focused on how existing bibliographic standards can be expressed as Semantic Web vocabularies to facilitate the ingration of library and cultural heritage data with other types of data. Harnessing the efforts of content providers and end-users to link, tag, edit, and describe their information in interoperable ways ("participatory metadata") is a key step towards providing knowledge environments that are scalable, self-correcting, and evolvable. DC-2008 will explore conceptual and practical issues in the development and deployment of semantic and social applications to meet the needs of specific communities of practice.

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Content

(1) The Boolean world; (2) The Non-Boolean picture; (3) The commercial search engines: Personal Librarian, CLARIT, ConQuest, DR-LINK, InQuizit, InTEXT, TOPIC, WIN, TARGET, FREESTYLE, InfoSeek; (4) Wiedergabe von 8 Aufsätzen aus 'Monitor'

Object

DR-LINK

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Date

22. 7.2007 12:05:26
22. 7.2007 12:08:24

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Issue

Vol.22.

Signature

78 BAHH 1089-22

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Abstract

From small research groups to large organizations, there has been tremendous effort in the last few years in publishing data online so that it is widely accessible to a large community. These efforts have been successful across a number of domains and have resulted in a proliferation of online sources. In the field of biology, there were 1.330 major online molecular databases at the beginning of 2011, which is 96 more than a year earlier. In the Linking Open Data (LOD) community project at the W3C, the number of published RDF triples has grown from 500 million in May 2007 to over 28 billion triples in March 2011. Fueling this data publishing explosion are tools for translating relational and semistructured data into RDF. In this chapter, we present LinQuer, a generic and extensible framework for integrating link discovery methods over relational data.

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Date

20. 1.2018 20:22:16

Footnote

Die letzten beiden Teile des Kongressbandes behandeln die Möglichkeiten der Bibliometrie zum Handling des sich explosionsartig vermehrenden Wissens sowie der Einsatz solcher Technologien als Trenderkennungssystem. Zuletzt behandelt ein Artikel die Evaluation der Helmholtz-Einrichtungen. Am Schluss befindet sich noch ein sechsseitiges Register, das sehr hilfreich und für einen Kongressband keineswegs selbstverständlich ist. Vielleicht sollte noch auf den als Einleitung abgedruckten, überaus lesenswerten Festvortrag von Ernst Pöppel, Professor für medizinische Psychologie aus München, hingewiesen werden, der die verschiedenen Formen des Wissens allgemeinverständlich aus Sicht der Hirnforschung darstellt. Hervorzuheben ist noch, dass die Publikation kostenlos über den Publikationsserver des FZ Jülich bezogen werden kann, eine Tatsache, die sich offensichtlich nicht herumgesprochen hat, da bei einer Suche über den Karlsruher Virtuellen Katalog (Stand: 22. April 2008) dieses »Exemplar« nicht gefunden wurde. Als höchstes der Gefühle bietet der Südwestverbund bei »elektronische Referenz« einen Link auf das Inhaltsverzeichnis. Vielleicht erbarmt sich pro Verbund jemand und nimmt die elektronische Version auf."

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Abstract

Der als Leihverkehrsinstrument auf Mikrofiche und online über DBI-LINK angebotene Verbundkatalog maschinenlesbarer Katalogdaten ist seit Okt. 1993 um eine ständige Dienstleistung erweitert - der RETRO-VK. Er ermöglicht den Bibliotheken die Datenübernahme zum Zwecke der Konversion. Diese Bedienungsanleitung informiert über den Aufbau der Datenbank, den Inhalt und die Zugriffsmöglichkeiten. Beschrieben sind hier in erster Linie die Unterschiede in dieser Anwendung im Gegensatz zu anderen IBAS-Anwendungen. Die Anleitung wurde aufgrund der 4. Ausgabe des VK sowie der von den Benutzern gewünschten Verbesserungswünschen aktualisiert

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Abstract

Electronic texts offer new ways to store, retrieve, update, and cross-link information. Hypermedia documents require new levels of organization and strict discipline from authors, editors, and managers. This book provides a step-by step guide to all aspects of hypermedia development, from strategic decision-making to editing formats and production methods

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Date

22. 7.2000 19:22:32

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Footnote

Chapter 2 (Technology and People) focuses an several theories of technological acceptance and diffusion. Unfortunately, Bruce's presentation is somewhat confusing as he moves from one theory to next, never quite connecting them into a logical sequence or coherent whole. Two theories are of particular interest to Bruce: the Theory of Diffusion of Innovations and the Theory of Planned Behavior. The Theory of Diffusion of Innovations is an "information-centric view of technology acceptance" in which technology adopters are placed in the information flows of society from which they learn about innovations and "drive innovation adoption decisions" (p. 20). The Theory of Planned Behavior maintains that the "performance of a behavior is a joint function of intentions and perceived behavioral control" (i.e., how muck control a person thinks they have) (pp. 22-23). Bruce combines these two theories to form the basis for the Technology Acceptance Model. This model posits that "an individual's acceptance of information technology is based an beliefs, attitudes, intentions, and behaviors" (p. 24). In all these theories and models echoes a recurring theme: "individual perceptions of the innovation or technology are critical" in terms of both its characteristics and its use (pp. 24-25). From these, in turn, Bruce derives a predictive theory of the role personal perceptions play in technology adoption: Personal Innovativeness of Information Technology Adoption (PIITA). Personal inventiveness is defined as "the willingness of an individual to try out any new information technology" (p. 26). In general, the PIITA theory predicts that information technology will be adopted by individuals that have a greater exposure to mass media, rely less an the evaluation of information technology by others, exhibit a greater ability to cope with uncertainty and take risks, and requires a less positive perception of an information technology prior to its adoption. Chapter 3 (A Focus an Usings) introduces the User-Centered Paradigm (UCP). The UCP is characteristic of the shift of emphasis from technology to users as the driving force behind technology and research agendas for Internet development [for a dissenting view, see Andrew Dillion's (2003) challenge to the utility of user-centerness for design guidance]. It entails the "broad acceptance of the user-oriented perspective across a range of disciplines and professional fields," such as business, education, cognitive engineering, and information science (p. 34).
Bruce begins Chapter 5 (The Users' View of the Internet) by pointing out that the Internet not only exists as a physical entity of hardware, software, and networked connectivity, but also as a mental representation or knowledge structure constructed by users based an their usings. These knowledge structures or constructs "allow people to interpret and make sense of things" by functioning as a link between the new unknown thing with known thing(s) (p. 158). The knowledge structures or using constructs are continually evolving as people use the Internet over time, and represent the user's view of the Internet. To capture the users' view of the Internet from the research literature, Bruce uses his Metatheory of Circulating Usings. He recapitulates the theory, casting it more closely to the study of Internet use than previously. Here the reduction component provides a more detailed "understanding of the individual users involved in the micromoment of Internet using" while simultaneously the amplification component increases our understanding of the "generalized construct of the Internet" (p. 158). From this point an Bruce presents a relatively detail users' view of the Internet. He starts with examining Internet usings, which is composed of three parts: using space, using literacies, and Internet space. According to Bruce, using space is a using horizon likened to a "sphere of influence," comfortable and intimate, in which an individual interacts with the Internet successfully (p. 164). It is a "composite of individual (professional nonwork) constructs of Internet utility" (p. 165). Using literacies are the groups of skills or tools that an individual must acquire for successful interaction with the Internet. These literacies serve to link the using space with the Internet space. They are usually self-taught and form individual standards of successful or satisfactory usings that can be (and often are) at odds with the standards of the information profession. Internet space is, according to Bruce, a user construct that perceives the Internet as a physical, tangible place separate from using space. Bruce concludes that the user's view of the Internet explains six "principles" (p. 173). "Internet using is proof of concept" and occurs in contexts; using space is created through using frequency, individuals use literacies to explore and utilize Internet space, Internet space "does not require proof of concept, and is often influence by the perceptions and usings of others," and "the user's view of the Internet is upbeat and optimistic" (pp. 173-175). He ends with a section describing who are the Internet stakeholders. Bruce defines them as Internet hardware/software developers, Professional users practicing their profession in both familiar and transformational ways, and individuals using the Internet "for the tasks and pleasures of everyday life" (p. 176).
This book suffers from two major shortcomings: the failure to explain how the metatheory is actually used to analyze extant research data, and the failure to explicitly link the data presented to the conclusions drawn. The analytical function of Bruce's metatheory is clearly stated, but no explicit explanation or example is given to show how he actually accomplished this analysis. Granted, it is impractical given the volume of research data involved, to show how every bit of the data in Chapter 4 was derived. However, several examples of how the metatheory was applied would have been useful in understanding its actual function in the study at hand as well as its potential utility any future studies. More serious is the lack of explicit linkage between the data summary presented in Chapter 4 and the conclusions given in Chapter 5. Each chapter is presented as stand-alone entities containing no citations or internal referencing to connect the data with the conclusions. This leaves the readers with no ready means to evaluate the concluding construct of the user's view of the Internet in light of the data from which it was ostensibly derived. The readers must either go back and laboriously construct the connections themselves, or just take the author's word for it. Because the goal of the book is to create a convincing construct of the user's view of the Internet for others to understand, follow, apply, and improve upon in the "next generation of Internet development," the burden of proof is an the author, not the readers (pp. ix, 183). This oversight may not be so crucial if the author were presenting an exploratory essay designed primarily to stimulate thought and expand our perceptions. However, given that the book is intended as a scholarly work (otherwise why the tremendous effort in analyzing and summarizing vast quantities of research data in Chapter 4?), the lack of explicit linkage between the data and the conclusion is not only puzzling, but simply unacceptable. In summary then, the book is strong in its theoretical and metatheoretical development, presentation of the research data and scope of the literature review, and clarity of the concluding construct of the user's view of the Internet. If these items are of particular interest to the you, then this book may be worth your while. Otherwise, the failure of the book to provide an explanation of how the Metatheory of Circulating Usings is applied in analyzing extant research data, coupled with book's failure to link explicitly the data presented with the conclusions severely undermines this reviewer's confidence in the author's conclusions."

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Abstract

WordNet, an electronic lexical database, is considerd to be the most important resource available to researchers in computational linguistics, text analysis, and many related areas. English nouns, verbs, adjectives, and adverbs are organized into synonym sets, each representing one underlying lexicalized concept. Different relations link the synonym sets. The purpose of this volume is twofold. First, it discusses the design of WordNet and the theoretical motivation behind it. Second, it provides a survey of representative applications, including word sense identification, information retrieval, selectional preferences of verbs, and lexical chains

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Abstract

The second edition of Understanding Search Engines: Mathematical Modeling and Text Retrieval follows the basic premise of the first edition by discussing many of the key design issues for building search engines and emphasizing the important role that applied mathematics can play in improving information retrieval. The authors discuss important data structures, algorithms, and software as well as user-centered issues such as interfaces, manual indexing, and document preparation. Significant changes bring the text up to date on current information retrieval methods: for example the addition of a new chapter on link-structure algorithms used in search engines such as Google. The chapter on user interface has been rewritten to specifically focus on search engine usability. In addition the authors have added new recommendations for further reading and expanded the bibliography, and have updated and streamlined the index to make it more reader friendly.

Content

Inhalt: Introduction Document File Preparation - Manual Indexing - Information Extraction - Vector Space Modeling - Matrix Decompositions - Query Representations - Ranking and Relevance Feedback - Searching by Link Structure - User Interface - Book Format Document File Preparation Document Purification and Analysis - Text Formatting - Validation - Manual Indexing - Automatic Indexing - Item Normalization - Inverted File Structures - Document File - Dictionary List - Inversion List - Other File Structures Vector Space Models Construction - Term-by-Document Matrices - Simple Query Matching - Design Issues - Term Weighting - Sparse Matrix Storage - Low-Rank Approximations Matrix Decompositions QR Factorization - Singular Value Decomposition - Low-Rank Approximations - Query Matching - Software - Semidiscrete Decomposition - Updating Techniques Query Management Query Binding - Types of Queries - Boolean Queries - Natural Language Queries - Thesaurus Queries - Fuzzy Queries - Term Searches - Probabilistic Queries Ranking and Relevance Feedback Performance Evaluation - Precision - Recall - Average Precision - Genetic Algorithms - Relevance Feedback Searching by Link Structure HITS Method - HITS Implementation - HITS Summary - PageRank Method - PageRank Adjustments - PageRank Implementation - PageRank Summary User Interface Considerations General Guidelines - Search Engine Interfaces - Form Fill-in - Display Considerations - Progress Indication - No Penalties for Error - Results - Test and Retest - Final Considerations Further Reading

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Date

22. 7.2000 18:21:08