-
Olvera Lobo, M.D.: Rendimiento de los sistemas de recuperacion de informacion en al World Wide Web : revision metodologica (2000)
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- Footnote
- Übers. d. Titels: Methodology for evaluating information retrieval in WWW search engines
-
Probst, M.; Mittelbach, J.: Maschinelle Indexierung in der Sacherschließung wissenschaftlicher Bibliotheken (2006)
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- Abstract
- Obwohl fast alle größeren Bibliotheken intellektuelle Sacherschließung betreiben, sind elektronische Kataloge für die zielgerichtete sachliche Suche nur eingeschränkt nutzbar. Durch maschinelle Indexierung können ohne nennenswerten personellen Mehraufwand ausreichend große Datenmengen für Informationsretrievalsysteme erzeugt und somit die Auffindbarkeit von Dokumenten erhöht werden. Geeignete Sprachanalysetechniken zur Indextermerzeugung sind bekannt und bieten im Gegensatz zur gebräuchlichen Freitextinvertierung entscheidende Vorteile beim Retrieval. Im Fokus steht die Betrachtung der Vor- und Nachteile der gängigen Indexierungssysteme MILOS und intelligentCAPTURE.
- Date
- 22. 3.2008 12:35:19
- Source
- Bibliothek: Forschung und Praxis. 30(2006) H.2, S.168-176
-
Martin, P.; Eklund, P.W.: Knowledge retrieval and the World Wide Web (2000)
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-
Khan, M.S.; Khor, S.: Enhanced Web document retrieval using automatic query expansion (2004)
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- Abstract
- The ever growing popularity of the Internet as a source of information, coupled with the accompanying growth in the number of documents made available through the World Wide Web, is leading to an increasing demand for more efficient and accurate information retrieval tools. Numerous techniques have been proposed and tried for improving the effectiveness of searching the World Wide Web for documents relevant to a given topic of interest. The specification of appropriate keywords and phrases by the user is crucial for the successful execution of a query as measured by the relevance of documents retrieved. Lack of users' knowledge an the search topic and their changing information needs often make it difficult for them to find suitable keywords or phrases for a query. This results in searches that fail to cover all likely aspects of the topic of interest. We describe a scheme that attempts to remedy this situation by automatically expanding the user query through the analysis of initially retrieved documents. Experimental results to demonstrate the effectiveness of the query expansion scheure are presented.
- Source
- Journal of the American Society for Information Science and technology. 55(2004) no.1, S.29-40
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Rasmussen, E.M.: Indexing and retrieval for the Web (2002)
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- Abstract
- The introduction and growth of the World Wide Web (WWW, or Web) have resulted in a profound change in the way individuals and organizations access information. In terms of volume, nature, and accessibility, the characteristics of electronic information are significantly different from those of even five or six years ago. Control of, and access to, this flood of information rely heavily an automated techniques for indexing and retrieval. According to Gudivada, Raghavan, Grosky, and Kasanagottu (1997, p. 58), "The ability to search and retrieve information from the Web efficiently and effectively is an enabling technology for realizing its full potential." Almost 93 percent of those surveyed consider the Web an "indispensable" Internet technology, second only to e-mail (Graphie, Visualization & Usability Center, 1998). Although there are other ways of locating information an the Web (browsing or following directory structures), 85 percent of users identify Web pages by means of a search engine (Graphie, Visualization & Usability Center, 1998). A more recent study conducted by the Stanford Institute for the Quantitative Study of Society confirms the finding that searching for information is second only to e-mail as an Internet activity (Nie & Ebring, 2000, online). In fact, Nie and Ebring conclude, "... the Internet today is a giant public library with a decidedly commercial tilt. The most widespread use of the Internet today is as an information search utility for products, travel, hobbies, and general information. Virtually all users interviewed responded that they engaged in one or more of these information gathering activities."
Techniques for automated indexing and information retrieval (IR) have been developed, tested, and refined over the past 40 years, and are well documented (see, for example, Agosti & Smeaton, 1996; BaezaYates & Ribeiro-Neto, 1999a; Frakes & Baeza-Yates, 1992; Korfhage, 1997; Salton, 1989; Witten, Moffat, & Bell, 1999). With the introduction of the Web, and the capability to index and retrieve via search engines, these techniques have been extended to a new environment. They have been adopted, altered, and in some Gases extended to include new methods. "In short, search engines are indispensable for searching the Web, they employ a variety of relatively advanced IR techniques, and there are some peculiar aspects of search engines that make searching the Web different than more conventional information retrieval" (Gordon & Pathak, 1999, p. 145). The environment for information retrieval an the World Wide Web differs from that of "conventional" information retrieval in a number of fundamental ways. The collection is very large and changes continuously, with pages being added, deleted, and altered. Wide variability between the size, structure, focus, quality, and usefulness of documents makes Web documents much more heterogeneous than a typical electronic document collection. The wide variety of document types includes images, video, audio, and scripts, as well as many different document languages. Duplication of documents and sites is common. Documents are interconnected through networks of hyperlinks. Because of the size and dynamic nature of the Web, preprocessing all documents requires considerable resources and is often not feasible, certainly not an the frequent basis required to ensure currency. Query length is usually much shorter than in other environments-only a few words-and user behavior differs from that in other environments. These differences make the Web a novel environment for information retrieval (Baeza-Yates & Ribeiro-Neto, 1999b; Bharat & Henzinger, 1998; Huang, 2000).
- Source
- Annual review of information science and technology. 37(2003), S.91-126
-
Drabenstott, K.M.: Web search strategies (2000)
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- Abstract
- Surfing the World Wide Web used to be cool, dude, real cool. But things have gotten hot - so hot that finding something useful an the Web is no longer cool. It is suffocating Web searchers in the smoke and debris of mountain-sized lists of hits, decisions about which search engines they should use, whether they will get lost in the dizzying maze of a subject directory, use the right syntax for the search engine at hand, enter keywords that are likely to retrieve hits an the topics they have in mind, or enlist a browser that has sufficient functionality to display the most promising hits. When it comes to Web searching, in a few short years we have gone from the cool image of surfing the Web into the frying pan of searching the Web. We can turn down the heat by rethinking what Web searchers are doing and introduce some order into the chaos. Web search strategies that are tool-based-oriented to specific Web searching tools such as search en gines, subject directories, and meta search engines-have been widely promoted, and these strategies are just not working. It is time to dissect what Web searching tools expect from searchers and adjust our search strategies to these new tools. This discussion offers Web searchers help in the form of search strategies that are based an strategies that librarians have been using for a long time to search commercial information retrieval systems like Dialog, NEXIS, Wilsonline, FirstSearch, and Data-Star.
- Content
- "Web searching is different from searching commercial IR systems. We can learn from search strategies recommended for searching IR systems, but most won't be effective for Web searching. Web searchers need strate gies that let search engines do the job they were designed to do. This article presents six new Web searching strategies that do just that."
- Date
- 22. 9.1997 19:16:05
- Imprint
- Urbana-Champaign, IL : Illinois University at Urbana-Champaign, Graduate School of Library and Information Science
-
Chen, H.: Introduction to the JASIST special topic section on Web retrieval and mining : A machine learning perspective (2003)
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- Abstract
- Research in information retrieval (IR) has advanced significantly in the past few decades. Many tasks, such as indexing and text categorization, can be performed automatically with minimal human effort. Machine learning has played an important role in such automation by learning various patterns such as document topics, text structures, and user interests from examples. In recent years, it has become increasingly difficult to search for useful information an the World Wide Web because of its large size and unstructured nature. Useful information and resources are often hidden in the Web. While machine learning has been successfully applied to traditional IR systems, it poses some new challenges to apply these algorithms to the Web due to its large size, link structure, diversity in content and languages, and dynamic nature. On the other hand, such characteristics of the Web also provide interesting patterns and knowledge that do not present in traditional information retrieval systems.
- Source
- Journal of the American Society for Information Science and technology. 54(2003) no.7, S.621-624
-
Yang, K.: Information retrieval on the Web (2004)
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- Abstract
- How do we find information an the Web? Although information on the Web is distributed and decentralized, the Web can be viewed as a single, virtual document collection. In that regard, the fundamental questions and approaches of traditional information retrieval (IR) research (e.g., term weighting, query expansion) are likely to be relevant in Web document retrieval. Findings from traditional IR research, however, may not always be applicable in a Web setting. The Web document collection - massive in size and diverse in content, format, purpose, and quality - challenges the validity of previous research findings that are based an relatively small and homogeneous test collections. Moreover, some traditional IR approaches, although applicable in theory, may be impossible or impractical to implement in a Web setting. For instance, the size, distribution, and dynamic nature of Web information make it extremely difficult to construct a complete and up-to-date data representation of the kind required for a model IR system. To further complicate matters, information seeking on the Web is diverse in character and unpredictable in nature. Web searchers come from all walks of life and are motivated by many kinds of information needs. The wide range of experience, knowledge, motivation, and purpose means that searchers can express diverse types of information needs in a wide variety of ways with differing criteria for satisfying those needs. Conventional evaluation measures, such as precision and recall, may no longer be appropriate for Web IR, where a representative test collection is all but impossible to construct. Finding information on the Web creates many new challenges for, and exacerbates some old problems in, IR research. At the same time, the Web is rich in new types of information not present in most IR test collections. Hyperlinks, usage statistics, document markup tags, and collections of topic hierarchies such as Yahoo! (http://www.yahoo.com) present an opportunity to leverage Web-specific document characteristics in novel ways that go beyond the term-based retrieval framework of traditional IR. Consequently, researchers in Web IR have reexamined the findings from traditional IR research.
- Source
- Annual review of information science and technology. 39(2005), S.33-80
-
Molloy, C.G.; Wollschläger, T.: Imagebildung in der Bibliothek : Konzeption eines Leit- und Orientierungssystems (2000)
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- Abstract
- Obwohl das Thema Imagebildung an Bibliotheken in den letzten Jahren immer mehr an Bedeutung gewonnen hat, wird die Gestaltung von Leit- und Orientierungssystemen dabei kaum in die Überlegungen einbezogen. Man spricht oft von einer "virtuellen Bibliothek", konzentriert sich darauf, den Benutzern die Mediensuche und -bestellung über das Internet - nicht zuletzt durch gute graphische Gestaltung der Benutzerführung auf der Homepage - so komfortabel wie möglich zu gestalten. Dabei vergisst man jedoch zumeist, dass die Benutzer zum Abholen und Zurückgeben der Medien, zur Nutzung von Freihand-, Lesesaal- und Sonderbeständen sowie zum Besuch von Ausstellungen und Veranstaltungen, die im Rahmen der Öffentlichkeitsarbeit stattfinden, immer noch die Bibliothek als Gebäude aufsuchen und sich dort zurechtfinden müssen. Eine gute inhaltliche und graphische Konzeption und Gestaltung des Leit- und Orientierungssystems ist hierbei ein prägnanter Teil der benutzerorientierten Öffentlichkeitsarbeit einer wissenschaftlichen Bibliothek. Das Leit- und Orientierungssystern kann das Image der Bibliothek nachhaltig verbessern und die Bindung der Benutzer an die Bibliothek verstärken. Zu Beginn soll zur Verdeutlichung eine Definition der Begriffe "Leit- und Orientierungssystem" stehen
- Series
- Gemeinsamer Kongress der Bundesvereinigung Deutscher Bibliotheksverbände e.V. (BDB) und der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V. (DGI); Bd.1)(Tagungen der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V.; Bd.3
- Source
- Information und Öffentlichkeit: 1. Gemeinsamer Kongress der Bundesvereinigung Deutscher Bibliotheksverbände e.V. (BDB) und der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V. (DGI), Leipzig, 20.-23.3.2000. Zugleich 90. Deutscher Bibliothekartag, 52. Jahrestagung der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V. (DGI). Hrsg.: G. Ruppelt u. H. Neißer
-
Daniel, F.: Neue Serviceangebote in einer modernen Öffentlichen Bibliothek am Beispiel der StadtBibliothek Köln (2000)
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- Abstract
- Was haben Videos, CD-ROM, Bücher, Musik-CDs, Zeitungen, DVDs, Zeitschriften, Noten, Karten und Spiele gemeinsam? Richtig: alle diese Medien gehören zum Standardangebot einer Öffentlichen Bibliothek. Aber noch eine weitere Gemeinsamkeit gibt es: die auf diese Weise angebotenen Inhalte findet man mittlerweile - losgelöst von ihrer physikalischen Form - auch im Internet! Das Internet als Distributionsmedium für Texte, Bilder, Töne, Filme macht den herkömmlichen Medien starke Konkurrenz und entwickelt sich zum alles umfassenden Vertriebskanal. Zwei Firmenübernahmen der letzten Monate zeugen beispielhaft von der zu erwartenden breiten Medienkonvergenz: Das Internetportal Yahoo! übernimmt das traditionsreiche Medienunternehmen Time Warner und die spanische Telefonica den Soap- und Gameshow-Produzenten Endemol, der verstärkt für das Web produzieren soll. Aber auch ohne Internetfernsehen sind Online-Banking, Reisebuchungen, Inforniationssuche, Chatten, E-Mailen, Surfen, Versteigerungen und elektronischer Einkauf für viele bereits Alltag. Fast ein Viertel der Deutschen sind schon online, weltweit sollen es bereits 300 Millionen Menschen sein 1 - Tendenz exponenziell steigend, Zwar ist momentan der Vertrieb von kostenpflichtigen Inhalten über das Weh für die breite Bevölkerung noch die Ausnahme, doch dies wird sich bald ändern. Schon macht das Schlagwort vom I-Commerce die Runde. Die digitale Signatur verspricht Rechtssicherheit beim elektronischen Einkaufsbummel und auch Kleinbeträge können auf komfortable Weise automatisch abgebucht werden. Für das Pay-per-ViewGeschäft mit Dokumenten bietet beispielsweise die Deutsche Telekom mittlerweile einen "Click & Pay"-Service an, der eine problemlose Abrechnung von Nutzungsentgelten über die Telefonrechnung ermöglicht. Wie ist angesichts der oft beschworenen "digitalen Revolution" die Rolle der Bibliotheken einzuschätzen? Sie bieten immerhin einen sorgfältig ausgewählten Medienbestand, sind gut sortiert, der Kunde wird persönlich betreut und konkurrenzlos preisgünstig ist es auch
- Series
- Gemeinsamer Kongress der Bundesvereinigung Deutscher Bibliotheksverbände e.V. (BDB) und der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V. (DGI); Bd.1)(Tagungen der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V.; Bd.3
- Source
- Information und Öffentlichkeit: 1. Gemeinsamer Kongress der Bundesvereinigung Deutscher Bibliotheksverbände e.V. (BDB) und der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V. (DGI), Leipzig, 20.-23.3.2000. Zugleich 90. Deutscher Bibliothekartag, 52. Jahrestagung der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V. (DGI). Hrsg.: G. Ruppelt u. H. Neißer
-
Moen, W.: Information retrieval protocols : Z39.50 and Search & Retrieve via URL (2009)
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- Abstract
- Information retrieval (IR) protocols support effective and interoperable intersystem search and retrieval. Although intersystem search methods have been envisioned and under development since the 1970s, it was the Z39.50 IR protocol, first released in 1988, that demonstrated real-world possibilities for such search and retrieval. As the networked information environment changed with the emergence of the World Wide Web, the need for standard IR protocols did not disappear, and one can argue the need is even more compelling given both the visible and invisible Web. A new protocol, based on the experience from Z39.50 but simpler and more comprehensible than Z39.50, is now being used for Web search and retrieval. Search and retrieve via URL (SRU) uses Web technologies and standards resulting in a Web friendly protocol that provides standard search access to existing Z39.50 resources and a wide-range of new non-catalog digital resources. This entry provides both an overview of the two protocols and technical details to understand both. A brief discussion of IR and communications protocols provides background to the specifics of these two IR protocols. Although communication protocols are by their nature technical specifications, this entry focuses on an overview of the functions and capabilities of the protocols. It uses technical concepts and terminology from the protocols to help explain how the protocols work but limits discussion of technical details.
- Source
- Encyclopedia of library and information sciences. 3rd ed. Ed.: M.J. Bates
-
Scammell, A.: Visions of the information future (2000)
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- Abstract
- A synthesis of some of the themes and ideas developed in a recently published book about the future of information: i in the sky: visions of the information future. Common themes included: problems in defining information and defining future time-scales, the ubiquity of information, accessibility, privacy censorship and control, customisation ofinformation products, the development of the World Wide Web, artificial intelligence and cybernetics, changes in working roles and structures of organisations, information literacy, information overload and the organisation and retrieval of information.
-
Schmidt, M.: WWW - eine Erfindung des "alten Europa" : Vom Elektronengehirn zum world Wide Web - Inzwichen 620 Millionen Internetnutzer weltweit (2003)
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- Content
- "Das World Wide, Web hat, wen wundert es, eine Vorgeschichte. Und zwar, und da staunt der Laie denn doch, im Internet. World Wide Web, Internet - ist denn das nicht dasselbe? Nein. Ist es nicht. Das WWW ist eine Funktion des Internet. Eine von vielen. So wie Email und Chat. Die Geschichte ist die. In den 40er Jahren des 20. Jahrhunderts wurden die ersten EDV-Anlagen gebaut. In den 60er und 70er Jahren gehörten riesige Computer mit Lochkarten, Magnetbändern und Endlos-Ausdrucken zu den Prestige-Objekten von Unis, , Banken und Firmen, ehrfürchtig "Elektronengehir ne" oder ironisch "Blechtrottel" genannt. 1957 hatte das US-Verteidigungsministerium unter dem Eindruck des Sputnik-Schocks die Forschungsinstitution ARPA gegründet. Zwölf jahre später entstand das ARPAnet - ein Projekt zur Entwicklung eines Forschungsnetzes, das Universitäten und zivile wie militärische US-Einrichtungen verband. Dass die treibende Kraft das Bedürfnis gewesen sein soll, das Netz vor Bomben zu schützen, ist wohl ein Gerücht. Nach Larry Roberts, einem der "Väter" des Internet, kam dieses Argument erst später auf. Es erwies sich als nützlich für das Aquirieren von Forschungsgeldern... Die globale elektronische Kommunikation blieb nicht auf die Welt der Akademiker beschränkt. Das Big Business begann die Lunte zu riechen. Fast überall, wanderten die Handelsmärkte vom Parkett und den Wandtafeln auf die Computerbildschirme: Das Internet war mittlerweile zu einem brauchbaren Datenübermittlungsmedium geworden, hatte aber noch einen Nachteil: Man konnte Informationen nur finden, wenn man wusste, wo man suchen muss. In den Folgejahren kam es zu einer Explosion in der Entwicklung neuer Navigationsprotokolle, es entstand als bedeutendste Entwicklung das WWW -übrigens im "alten Europa", am europäischen Forschungszentrum für Teilchenphysik (CERN) in Genf. Erfunden hat es Tim Berners-Lee. Seine Erfindung war eine doppelte. Zunächst die Anwendung des schon lange bekannten Hypertextprinzipes (Ted Nelson, 1972) auf elektronische Dokumente - in der Hypertext Markup Language (HTML). Und dann eine einfache von Herrn und Frau Jedermann bedienbare grafische Oberfläche, die diese Dokumente, austauscht und zur Anzeige bringt (über das Hypertext Transport Protokoll - HTTP). Die allererste Software hieß "Mosaic" und wird heute Browser genannt. Im April 1993 gab das CERN die World-Wide-Web-Software für. die Öffentlichkeit frei, zur unbeschränkten und kostenlosen Nutzung. Heute umfasst das WWW über 32 Millionen registrierte Domain-Namen, davon 5 Millionen .deDomains, und der weltweite Zugang zum Internet erreichte Ende 2002 über 620 Millionen Nutzer."
- Date
- 3. 5.1997 8:44:22
-
Mönch, C.; Aalberg, T.: Automatic conversion from MARC to FRBR (2003)
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- Abstract
- Catalogs have for centuries been the main tool that enabled users to search for items in a library by author, title, or subject. A catalog can be interpreted as a set of bibliographic records, where each record acts as a surrogate for a publication. Every record describes a specific publication and contains the data that is used to create the indexes of search systems and the information that is presented to the user. Bibliographic records are often captured and exchanged by the use of the MARC format. Although there are numerous rdquodialectsrdquo of the MARC format in use, they are usually crafted on the same basis and are interoperable with each other -to a certain extent. The data model of a MARC-based catalog, however, is rdquo[...] extremely non-normalized with excessive replication of datardquo [1]. For instance, a literary work that exists in numerous editions and translations is likely to yield a large result set because each edition or translation is represented by an individual record, that is unrelated to other records that describe the same work.
- Source
- Research and advanced technology for digital libraries : 7th European Conference, proceedings / ECDL 2003, Trondheim, Norway, August 17-22, 2003
-
Weilenmann, A.-K.: Informationsdienstleistungen für virtuelle Universitäten (2000)
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- Abstract
- Die sich rasant verändernde Informationslandschaft erfordert ein Umdenken in den verschiedenen Informations- und Dokumentationsstellen; es gibt kaum noch einen Arbeitsbereich, der nicht stetigen Umwälzungen unterworfen ist. Besonders in der Auskunftstätigkeit sehen wir uns mit neuen Herausforderungen konfrontiert, um der zunehmenden Disintermediation zu begegnen. Unseren Kunden stehen übers Internet vielfältige Wege zur Verfügung, um sich die Informationen selbst zu beschaffen, was jedoch meist dazu führt, dass sie sich in den Weiten des World Wide Web verlieren. Die Kompetenz und sachkundige Navigationshilfe der Informations- und Dokumentationsspezialisten wird demnach je länger, umso mehr gefordert sein; es verändert sich lediglich die Art und Weise des Auskunftgebens: ,Librarians need to more formally incorporate this awesome information power into a new model of service provision so that they may position themselves to meet the needs of reference services in the next century". Vor diesem Hintergrund drängt sich nicht nur ein anderes Vorgehen beim Kundeninterview auf, sondern es stellt sich ebenfalls die Frage, wie man die Informations- und Kommunikationstechnologien (l+K-Technologien) sinnvoll einsetzen kann, sowohl für den konventionellen als auch für den virtuellen Auskunftsdienst. Das zunehmende Aufkommen virtueller Universitäten verlangt nach neuen innovativen Ideen, um den potenziellen Studenten angemessene Dienstleistungen zu bieten, die es ihnen erlauben, das ganze Spektrum der l+K-Technologien voll auszuschöpfen. Virtuelle Auskunftsdienste bzw. "virtual reference desks" sind immer häufiger beliebte Themen in der Fachpresse und werden in Zukunft als entscheidender Wettbewerbsfaktor gelten. Wie kann man die vorhandenen Informationen so bündeln und kanalisieren, dass unsere Kunden so rasch und so effizient als möglich zu den von ihnen nachgefragten Inhalten kommen? Ein kurzer Überblick über den heutigen Entwicklungsstand der "virtual reference desks" zeigt auf, dass vor allem die "Internet Public Library" (IPL) auf diesem Gebiet Pionierarbeit geleistet hat, dass ihre Angebote jedoch nicht über E-Mail-Auskunft hinausgehen. Anhand eines dreistufigen Auskunftsmodells werden fortschrittliche Möglichkeiten aufgezeigt, wie man Fernauskunft unter Einbezug aller Internetdienste (E-Mail, Newsgroups, Chat, WWW) abwickeln und gestalten könnte, wobei vor allem technische Ansätze berücksichtigt werden, das ganze Umfeld einer virtuellen Universität jedoch nicht außer Acht gelassen wird.
- Series
- Gemeinsamer Kongress der Bundesvereinigung Deutscher Bibliotheksverbände e.V. (BDB) und der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V. (DGI); Bd.1)(Tagungen der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V.; Bd.3
- Source
- Information und Öffentlichkeit: 1. Gemeinsamer Kongress der Bundesvereinigung Deutscher Bibliotheksverbände e.V. (BDB) und der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V. (DGI), Leipzig, 20.-23.3.2000. Zugleich 90. Deutscher Bibliothekartag, 52. Jahrestagung der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V. (DGI). Hrsg.: G. Ruppelt u. H. Neißer
-
Krause, J.: Shell Model, Semantic Web and Web Information Retrieval (2006)
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- Abstract
- The middle of the 1990s are coined by the increased enthusiasm for the possibilities of the WWW, which has only recently deviated - at least in relation to scientific information - for the differentiated measuring of its advantages and disadvantages. Web Information Retrieval originated as a specialized discipline with great commercial significance (for an overview see Lewandowski 2005). Besides the new technological structure that enables the indexing and searching (in seconds) of unimaginable amounts of data worldwide, new assessment processes for the ranking of search results are being developed, which use the link structures of the Web. They are the main innovation with respect to the traditional "mother discipline" of Information Retrieval. From the beginning, link structures of Web pages are applied to commercial search engines in a wide array of variations. From the perspective of scientific information, link topology based approaches were in essence trying to solve a self-created problem: on the one hand, it quickly became clear that the openness of the Web led to an up-tonow unknown increase in available information, but this also caused the quality of the Web pages searched to become a problem - and with it the relevance of the results. The gatekeeper function of traditional information providers, which narrows down every user query to focus on high-quality sources was lacking. Therefore, the recognition of the "authoritativeness" of the Web pages by general search engines such as Google was one of the most important factors for their success.
- Source
- Information und Sprache: Beiträge zu Informationswissenschaft, Computerlinguistik, Bibliothekswesen und verwandten Fächern. Festschrift für Harald H. Zimmermann. Herausgegeben von Ilse Harms, Heinz-Dirk Luckhardt und Hans W. Giessen
- Theme
- Semantic Web
-
Can, F.; Nuray, R.; Sevdik, A.B.: Automatic performance evaluation of Web search engines (2004)
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- Abstract
- Measuring the information retrieval effectiveness of World Wide Web search engines is costly because of human relevance judgments involved. However, both for business enterprises and people it is important to know the most effective Web search engines, since such search engines help their users find higher number of relevant Web pages with less effort. Furthermore, this information can be used for several practical purposes. In this study we introduce automatic Web search engine evaluation method as an efficient and effective assessment tool of such systems. The experiments based on eight Web search engines, 25 queries, and binary user relevance judgments show that our method provides results consistent with human-based evaluations. It is shown that the observed consistencies are statistically significant. This indicates that the new method can be successfully used in the evaluation of Web search engines.
- Source
- Information processing and management. 40(2004) no.3, S.495-514
-
Düro, M.; Zhang, Z.; Heuer, A.; Engel, T.; Meinel, C.: Aufbau einer Digitalen Bibliothek mit einem Online-Redaktionssystem (2000)
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- Series
- Gemeinsamer Kongress der Bundesvereinigung Deutscher Bibliotheksverbände e.V. (BDB) und der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V. (DGI); Bd.1)(Tagungen der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V.; Bd.3
- Source
- Information und Öffentlichkeit: 1. Gemeinsamer Kongress der Bundesvereinigung Deutscher Bibliotheksverbände e.V. (BDB) und der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V. (DGI), Leipzig, 20.-23.3.2000. Zugleich 90. Deutscher Bibliothekartag, 52. Jahrestagung der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V. (DGI). Hrsg.: G. Ruppelt u. H. Neißer
-
Miyamoto, S.: Information clustering based an fuzzy multisets (2003)
0.03
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- Abstract
- A fuzzy multiset model for information clustering is proposed with application to information retrieval on the World Wide Web. Noting that a search engine retrieves multiple occurrences of the same subjects with possibly different degrees of relevance, we observe that fuzzy multisets provide an appropriate model of information retrieval on the WWW. Information clustering which means both term clustering and document clustering is considered. Three methods of the hard c-means, fuzzy c-means, and an agglomerative method using cluster centers are proposed. Two distances between fuzzy multisets and algorithms for calculating cluster centers are defined. Theoretical properties concerning the clustering algorithms are studied. Illustrative examples are given to show how the algorithms work.
- Source
- Information processing and management. 39(2003) no.2, S.195-213
-
González-Alcaide, G.; Castelló-Cogollos, L.; Navarro-Molina, C.; Aleixandre-Benavent, R.; Valderrama-Zurián, J.C.: Library and information science research areas : analysis of journal articles in LISA (2008)
0.03
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- Abstract
- The main fields of research in Library Science and Documentation are identified by quantifying the frequency of appearance and the analysis of co-occurrence of the descriptors assigned to 11,273 indexed works in the Library and Information Science Abstracts (LISA) database for the 2004-2005 period. The analysis made has enabled three major core research areas to be identified: World Wide Web, Libraries and Education. There are a further 12 areas of research with specific development, one connected with the library sphere and another 11 connected with the World Wide Web and Internet: Networks, Computer Security, Information technologies, Electronic Resources, Electronic Publications, Bibliometrics, Electronic Commerce, Computer applications, Medicine, Searches and Online Information retrieval.
- Source
- Journal of the American Society for Information Science and Technology. 59(2008) no.1, S.150-154
