-
Head, M.; Archer, N.; Yuan, Y.: World Wide Web navigation aid (2000)
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- Source
- International journal of human-computer studies. 52(2000) no.2, S.301-330
-
Munson, K.I.: Internet search engines : understanding their design to improve information retrieval (2000)
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- Abstract
- The relationship between the methods currently used for indexing the World Wide Web and the programs, languages, and protocols on which the World Wide Web is based is examined. Two methods for indexing the Web are described, directories being briefly discussed while search engines are considered in detail. The automated approach used to create these tools is examined with special emphasis on the parts of a document used in indexing. Shortcomings of the approach are described. Suggestions for effective use of Web search engines are given
-
Garnsey, M.R.: What distance learners should know about information retrieval on the World Wide Web (2002)
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- Abstract
- The Internet can be a valuable tool allowing distance learners to access information not available locally. Search engines are the most common means of locating relevant information an the Internet, but to use them efficiently students should be taught the basics of searching and how to evaluate the results. This article briefly reviews how Search engines work, studies comparing Search engines, and criteria useful in evaluating the quality of returned Web pages. Research indicates there are statistical differences in the precision of Search engines, with AltaVista ranking high in several studies. When evaluating the quality of Web pages, standard criteria used in evaluating print resources is appropriate, as well as additional criteria which relate to the Web site itself. Giving distance learners training in how to use Search engines and how to evaluate the results will allow them to access relevant information efficiently while ensuring that it is of adequate quality.
- Theme
- Computer Based Training
-
Lu, G.; Williams, B.; You, C.: ¬An effective World Wide Web image search engine (2001)
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-
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
-
Heery, R.: Information gateways : collaboration and content (2000)
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- Abstract
- Information subject gateways provide targeted discovery services for their users, giving access to Web resources selected according to quality and subject coverage criteria. Information gateways recognise that they must collaborate on a wide range of issues relating to content to ensure continued success. This report is informed by discussion of content activities at the 1999 Imesh Workshop. The author considers the implications for subject based gateways of co-operation regarding coverage policy, creation of metadata, and provision of searching and browsing across services. Other possibilities for co-operation include working more closely with information providers, and diclosure of information in joint metadata registries
- Date
- 22. 6.2002 19:38:54
-
cöln: Helfer für jede Britney-Lage (2001)
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- Abstract
- Das World Wide Web ist eine Wundertüte. wie aber findet man genau das, was man sucht? Durch Suchmaschinen!
-
Bharat, K.: SearchPad : explicit capture of search context to support Web search (2000)
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- Source
- Computer networks. 33(2000) nos.1/6, S.493-501
-
Zhang, D.; Dong, Y.: ¬An effective algorithm to rank Web resources (2000)
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- Source
- Computer networks. 33(2000) nos.1/6, S.449-455
-
Sugiura, A.; Etzioni, O.: Query routing for Web search engines : architecture and experiments (2000)
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- Source
- Computer networks. 33(2000) nos.1/6, S.417-429
-
Herrera-Viedma, E.; Pasi, G.: Soft approaches to information retrieval and information access on the Web : an introduction to the special topic section (2006)
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- Abstract
- The World Wide Web is a popular and interactive medium used to collect, disseminate, and access an increasingly huge amount of information, which constitutes the mainstay of the so-called information and knowledge society. Because of its spectacular growth, related to both Web resources (pages, sites, and services) and number of users, the Web is nowadays the main information repository and provides some automatic systems for locating, accessing, and retrieving information. However, an open and crucial question remains: how to provide fast and effective retrieval of the information relevant to specific users' needs. This is a very hard and complex task, since it is pervaded with subjectivity, vagueness, and uncertainty. The expression soft computing refers to techniques and methodologies that work synergistically with the aim of providing flexible information processing tolerant of imprecision, vagueness, partial truth, and approximation. So, soft computing represents a good candidate to design effective systems for information access and retrieval on the Web. One of the most representative tools of soft computing is fuzzy set theory. This special topic section collects research articles witnessing some recent advances in improving the processes of information access and retrieval on the Web by using soft computing tools, and in particular, by using fuzzy sets and/or integrating them with other soft computing tools. In this introductory article, we first review the problem of Web retrieval and the concept of soft computing technology. We then briefly introduce the articles in this section and conclude by highlighting some future research directions that could benefit from the use of soft computing technologies.
- Date
- 22. 7.2006 16:59:33
- Footnote
- Beitrag in einer Special Topic Section on Soft Approaches to Information Retrieval and Information Access on the Web
-
Jansen, B.J.; Spink, A.: How are we searching the World Wide Web? : A comparison of nine search engine transaction logs (2006)
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- Abstract
- The Web and especially major Web search engines are essential tools in the quest to locate online information for many people. This paper reports results from research that examines characteristics and changes in Web searching from nine studies of five Web search engines based in the US and Europe. We compare interactions occurring between users and Web search engines from the perspectives of session length, query length, query complexity, and content viewed among the Web search engines. The results of our research shows (1) users are viewing fewer result pages, (2) searchers on US-based Web search engines use more query operators than searchers on European-based search engines, (3) there are statistically significant differences in the use of Boolean operators and result pages viewed, and (4) one cannot necessary apply results from studies of one particular Web search engine to another Web search engine. The wide spread use of Web search engines, employment of simple queries, and decreased viewing of result pages may have resulted from algorithmic enhancements by Web search engine companies. We discuss the implications of the findings for the development of Web search engines and design of online content.
-
Bar-Ilan, J.: ¬The use of Web search engines in information science research (2003)
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- Abstract
- The World Wide Web was created in 1989, but it has already become a major information channel and source, influencing our everyday lives, commercial transactions, and scientific communication, to mention just a few areas. The seventeenth-century philosopher Descartes proclaimed, "I think, therefore I am" (cogito, ergo sum). Today the Web is such an integral part of our lives that we could rephrase Descartes' statement as "I have a Web presence, therefore I am." Because many people, companies, and organizations take this notion seriously, in addition to more substantial reasons for publishing information an the Web, the number of Web pages is in the billions and growing constantly. However, it is not sufficient to have a Web presence; tools that enable users to locate Web pages are needed as well. The major tools for discovering and locating information an the Web are search engines. This review discusses the use of Web search engines in information science research. Before going into detail, we should define the terms "information science," "Web search engine," and "use" in the context of this review.
-
Fordahl, M.: Mit Google den PC durchforsten : Kleines Programm erstellt in rechenfreien Zeiten einen Index (2004)
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- Content
- "Die Google-Suche nach Dateien im Internet kann nun auch auf en eigenen PC ausgedehnt werden. Ein kleines kostenloses Programm, das sich am unteren Bildschirmrand einnistet, startet die Volltextsuche auf der Festplatte. Google erfasst den Inhalt aller Web-Seiten und Dokumente im Microsoft-Office-Format sowie die Namen sonstiger Dateien und zeigt die Trefferliste im Browser in der vertrauten Liste an - allerdings nur auf Computern mit Windows 2000 oder Windows XE Bei der Entwicklung dieses Werkzeugs hat Google sowohl die eigene Suchtechnologie als auch eine Schwäche von Windows ausgenutzt. Bei der "Desktop-Suche" kommt der gleiche Algorithmus zum Einsatz wie bei der Internet-Suche. Für die dazu benötigte Datenbank wird der Index-Dienst von Windows verwendet, der nur wenigen Anwendern bekannt ist, weil er etwas kompliziert und obendrein ziemlich langsam ist. Das neue Google Tool erstellt selbst diesen Suchindex für die Dateien in der Zeit, wenn der Computer gerade untätig ist. Sobald das 400 KB große Programm heruntergeladen und installiert ist, fängt es damit an, den PC zu durchforsten. Bei gut gefüllten Festplatten dauert es ein paar Stunden oder auch ein paar Tage, bis dieser Vorgang abgeschlossen ist. Sobald der Prozessor 30 Sekunden nichts zu tun hat, wird die Arbeit am Index aufgenommen beziehungsweise fortgesetzt. Ist er fertig, bietet diese Datenbank das Material, auf den sich der Google- Algorithmus stürzt, sobald eine Suchanfrage gestartet wird. Die meisten Google-Tricks für die Suche nach Web-Seiten, Bildern oder Beiträgen in Newsgroups funktionieren auch bei der Desktop-Suche."
- Date
- 3. 5.1997 8:44:22
- Series
- Computer
- Source
- Bergische Landeszeitung. Nr.247 vom 21.10.2004, S.22
-
ap: Konkurrenz für Google : Neue Suchmaschine "Teoma" gestartet (2002)
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- Content
- "Die Suchmaschine Google gilt oft als der beste Weg, um schnell etwas im Internet zu finden. Das war einmal, behauptet Apostolos Gerasoulis, jetzt gebe es www.teoma. com. "Wir sind die nächste Generation der Suchmaschinen", verspricht der Mathematikprofessor. Die Web-Sites von Google und Teoma sind ähnlich aufgemacht. Beide bieten eine weitgehend weiße Startseite mit wenigen, klaren Farben. Beide Suchmaschinen benutzen bei ihrer Arbeit zur Analyse der Anfragen einen komplizierten Algorithmus. Teoma hält den eigenen Ansatz aber für besser, weil dabei das Internet in Gruppen von Online-Gemeinschaften unterteilt wird. Dies liefere bessere Ergebnisse und erlaube eine nützlichere Auswahl. Zu einem Suchbegriff erscheinen bei Teoma zuerst links oben die bezahlten Verweise, darunter dann' alle anderen gefundenen Web-Seiten. Rechts erscheinen Vorschläge zur Verfeinerung der Suchanfrage, darunter manchmal Links von "Experten und Enthusiasten". Diese qualifizierten Antworten sind eine der Stärken, mit denen Teoma wuchern möchte. Sie sind besonders für Anfänger nützlich, die nach allgemeinen Themen wie Afrika" oder "Fußball" suchen. Allerdings könnte dieser Ergebnisdienst Nutzer auch überfordern, gerade wenn sie an das einfache Google gewöhnt seien, kritsiert Rob Lancaster von der Yankee Group."
- Date
- 3. 5.1997 8:44:22
- Series
- Computer
-
Boldi, P.; Santini, M.; Vigna, S.: PageRank as a function of the damping factor (2005)
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- Abstract
- PageRank is defined as the stationary state of a Markov chain. The chain is obtained by perturbing the transition matrix induced by a web graph with a damping factor alpha that spreads uniformly part of the rank. The choice of alpha is eminently empirical, and in most cases the original suggestion alpha=0.85 by Brin and Page is still used. Recently, however, the behaviour of PageRank with respect to changes in alpha was discovered to be useful in link-spam detection. Moreover, an analytical justification of the value chosen for alpha is still missing. In this paper, we give the first mathematical analysis of PageRank when alpha changes. In particular, we show that, contrarily to popular belief, for real-world graphs values of alpha close to 1 do not give a more meaningful ranking. Then, we give closed-form formulae for PageRank derivatives of any order, and an extension of the Power Method that approximates them with convergence O(t**k*alpha**t) for the k-th derivative. Finally, we show a tight connection between iterated computation and analytical behaviour by proving that the k-th iteration of the Power Method gives exactly the PageRank value obtained using a Maclaurin polynomial of degree k. The latter result paves the way towards the application of analytical methods to the study of PageRank.
- Date
- 16. 1.2016 10:22:28
- Source
- http://vigna.di.unimi.it/ftp/papers/PageRankAsFunction.pdf [Proceedings of the ACM World Wide Web Conference (WWW), 2005]
-
Stock, M.; Stock, W.G.: Internet-Suchwerkzeuge im Vergleich : Teil 1: Retrievaltests mit Known Item searches (2000)
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- Abstract
- Web Search Engines und Web Directories sind die technologische Speerspitze im High-Tech-Bereich Internet. Als Suchassistenten gestatten sie Laien und Profi-Searchern gleichsam einen optimalen Einstieg in die Vielfalt der Informationsquellen des World Wide Web, Sie ermöglichen durch eine Kombination aus hierarchisch geordnetem kontrollierten Vokabular, automatischer Indexierung sowie diverser Synonym-, Homonym- und Fachwörterbücher einen zielgenauen Zugriff auf WebSites. - Stop! Glauben Sie das? Wir waren skeptisch und haben Suchmaschinen und Suchverzeichnisse genau angeschaut. Durchgeführt wurde ein Retrievaltest, der unterschiedliche Suchsysteme mit jeweils dergleichen Anfrage konfrontierte, auf die wir bereits die Antwort wussten ("Known Item Search"). Skizziert werden zudem bisher ausgearbeitete empirische Erhebungen zur Evaluation von Web-Retrievalsystemen, angefangen von seriösen informationswissenschaftlichen Forschungen bis hinzu den Tests in Publikumszeitschriften
- Object
- Web-Crawler
-
Olvera Lobo, M.D.: Rendimiento de los sistemas de recuperacion de informacion en al World Wide Web : revision metodologica (2000)
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-
Wolff, C.: Effektivität von Recherchen im WWW : Vergleichende Evaluierung von such- und Metasuchmaschinen (2000)
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- Abstract
- Der vorliegende Beitrag befasst sich mit der Informationssuche im World Wide Web und ihrer Evaluierung. Ausgehend von einer Zusammenschau der wesentlichen Merkmale des World Wide Web als heterogener Dokumentkollektion (Kap. 1) werden Aufbau und Merkmale von Suchmaschinen und Metasuchmaschinen eingeführt sowie die Problematik der Evaluierung von Suchmaschinen und eine Übersicht bisheriger Ergebnisse diskutiert (Kap. 2). In Kap. 3 werden Aufbau, Durchführung und Ergebnisse einer Vergleichstudie vorgestellt, bei der mit Hilfe eines paper-and-pencil-Experiments ausgewählte Such- und Metasuchmaschinen evaluiert wurden. Schließlich zieht Kap. 4 Schlussfolgerungen aus dieser Studie und gibt einen Ausblick auf Optimierungsmöglichkeiten für Suchmaschinen
-
Fang, X.; Salvendy, G.: Keyword comparison : a user-centered feature for improving Web search tools (2000)
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- Source
- International journal of human-computer studies. 52(2000) no.5, S.915-931
