Search (69 results, page 1 of 4)

  • × theme_ss:"Internet"
  • × theme_ss:"Suchmaschinen"
  • × type_ss:"a"
  1. Hsieh-Yee, I.: ¬The retrieval power of selected search engines : how well do they address general reference questions and subject questions? (1998) 0.04 
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    Abstract
    Evaluates the performance of 8 major Internet search engines in answering 21 real reference questions and 5 made up subject questions. Reports on the retrieval and relevancy ranking abilities of the search engines. Concludes that the search engines did not produce good results for the reference questions unlike for the subject questions. The best engines are identified by type of questions, with Infoseek best for the subject questions, and OpenText best for refrence questions
    Date
    25.12.1998 19:22:51
    Footnote
    Part of an issue devoted to electronic resources and their use in libraries, from the viewpoint of reference services, with an emphasis on the Internet and Geographic Information Systems
    Theme
    Internet
  2. Bertelmann, R.; Rusch-Feja, D.: Informationsretrieval im Internet : Surfen, Browsen, Suchen - mit einem Überblick über strukturierte Informationsangebote (1997) 0.04 
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    Abstract
    Das gezielte Suchen im Internet findet in erster Linie mit Hilfe der Suchmaschinen statt. Daneben gibt es aber bereits eine Fülle von strukturierten Informationsangeboten, aufbereiteten Listen und Sammelstellen, die als Clearinghouse, Subject Gateway, Subject Tree oder Resource Pages bezeichnet werden. Solche intellektuell erstellten Übersichten geben in der Regel bereits Hinweise zu Inhalt und fachlichem Niveau der Quelle. Da die Art und Weise der Aufbereitung bei den Sammelstellen sehr unterschiedlich funktioniert, ist die Kenntnis ihrer Erschließungskriterien für ein erfolgreiches Retrieval unverzichtbar
    Date
    9. 7.2000 11:31:22
    Source
    Internet: Grundlagen, Technik, Anwendungen. Hrsg.: M. Rothe u.a
    Theme
    Internet
  3. Sauer, D.: Alles schneller finden (2001) 0.03 
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    Date
    1. 8.1997 14:03:29
    11.11.2001 17:25:22
    Source
    Com!online. 2001, H.12, S.24-29
    Theme
    Internet
  4. Wiley, D.L.: Beyond information retrieval : ways to provide content in context (1998) 0.03 
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    Abstract
    The days of the traditional abstracting and indexing services are waning, as abstracts and bibliographic data become commodities. However, there are tremedous opportunities for those organizations willing to look beyond the status quo to the new possibilities enabled by the latest wave of advanced technologies. Those who own content need to focus on the delivery mechanisms and new markets that technology can provide. Features like automatic extraction of key concepts or names, collaborative filtering to help with trend analysis, and visualization techniques can take information past the retrieval stage and into the management area
    Source
    Database. 21(1998) no.4, S.18-22
    Theme
    Internet
  5. Ardo, A.; Lundberg, S.: ¬A regional distributed WWW search and indexing service : the DESIRE way (1998) 0.02 
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    Date
    1. 8.1996 22:08:06
    Theme
    Klassifikationssysteme im Online-Retrieval
    Internet
  6. Stock, W.G.: Verkaufte Suchwörter, verkaufte Links : Retrieval nach Homepages optimiert? (1999) 0.02 
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    Abstract
    Selten wurde ein Dienst so stark diskutiert wie 'RealNames', da sowohl seine Suchwörter als auch die darauf aufsetzenden Links auf Homepages verkauft werden. Machen wir uns doch nichts vor: Das WWW ist ein kommerzielles Unternehmen, die Dienstleistungen müssen finanziert werden. Und warum soll nicht ein Privatunternehmen mit Inhaltserschließung Gewinne erzielen? RealNames mit seinem 'Internet Keyword System' ist eine interessante Idee, das Retrieval nach Homepages zielgenau durchzuführen. Was bringt RealNames den Nutzern? Wann sollte jemand, der Sites im WWW unterhält, Suchwörter und Links bei RealNames abonnieren (und was kostet das)? Im Oktober 1999 haben wir RealNames genauer angeschaut. Analysiert wurde das gezielte Retrieval nach Homepages bei AltaVista, Fireball und bei RealNames.com
    Theme
    Internet
  7. Hannemann, M.: Online ins Schlaraffenland der Wissenschaft : Literatur-Recherche im Internet ist ein teures Unterfangen ohne Erfolgsgarantie - Doch wer systematisch sucht, gelangt zügig ans Ziel (1999) 0.02 
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    Date
    3. 5.1997 8:44:22
    Theme
    Internet
  8. Eggeling, T.; Kroschel, A.: Alles finden im Web (2000) 0.02 
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    Abstract
    Zu jedem denkbaren Thema gibt's Infos im Internet. Doch nicht selten finden Sie entweder zu viel - oder gar nichts. Wir sagen Ihnen, welche Suchmaschinen sich für bestimmte Aufgaben optimal eignen und was Sie bei Ihren Anfragen beachten sollten
    Date
    9. 7.2000 14:06:22
    Theme
    Internet
  9. Zins, C.: Models for classifying Internet resources (2002) 0.02 
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    Abstract
    Designing systematic access to Internet resources is a major item an the agenda of researchers and practitioners in the field of information science, and is the focus of this study. A critical analysis of classification schemes used in major portals and Web classified directories exposes inconsistencies in the way they classify Internet resources. The inconsistencies indicate that the developers fall to differentiate the various classificatory models, and are unaware of their different rationales. The study establishes eight classificatory models for resources available to Internet users. Internet resources can be classified by subjects, objects, applications, users, locations, reference sources, media, and languages. The first five models are contentrelated; namely they characterize the content of the resource. The other three models are formst-related; namely they characterize the format of the resource or its technological infrastructure. The study identifies and formulates the eight classificatory models, analyzes their rationales, and discusses alternative ways to combine them in a faceted integrated classification scheme.
    Source
    Knowledge organization. 29(2002) no.1, S.20-28
    Theme
    Internet
  10. Garnsey, M.R.: What distance learners should know about information retrieval on the World Wide Web (2002) 0.02 
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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
    Internet
  11. Drabenstott, K.M.: Web search strategies (2000) 0.02 
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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.
    Date
    22. 9.1997 19:16:05
    Theme
    Internet
  12. Fu, T.; Abbasi, A.; Chen, H.: ¬A focused crawler for Dark Web forums (2010) 0.01 
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    Abstract
    The unprecedented growth of the Internet has given rise to the Dark Web, the problematic facet of the Web associated with cybercrime, hate, and extremism. Despite the need for tools to collect and analyze Dark Web forums, the covert nature of this part of the Internet makes traditional Web crawling techniques insufficient for capturing such content. In this study, we propose a novel crawling system designed to collect Dark Web forum content. The system uses a human-assisted accessibility approach to gain access to Dark Web forums. Several URL ordering features and techniques enable efficient extraction of forum postings. The system also includes an incremental crawler coupled with a recall-improvement mechanism intended to facilitate enhanced retrieval and updating of collected content. Experiments conducted to evaluate the effectiveness of the human-assisted accessibility approach and the recall-improvement-based, incremental-update procedure yielded favorable results. The human-assisted approach significantly improved access to Dark Web forums while the incremental crawler with recall improvement also outperformed standard periodic- and incremental-update approaches. Using the system, we were able to collect over 100 Dark Web forums from three regions. A case study encompassing link and content analysis of collected forums was used to illustrate the value and importance of gathering and analyzing content from such online communities.
    Theme
    Internet
  13. Charisius, H.: Gängige Suchmaschinen übersehen weite Bereiche des Internet, neue Dienste helfen beim Heben der Info-Schätze : Mehr drin, als man denkt (2003) 0.01 
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    Abstract
    Unendlich weit. Über Jahrzehnte wuchs das Internet zum Wissenskosmos. Neue Suchstrategien erschließen Nutzern die verborgenen Informationen. Mit Bezugnahme auf das Invisible Web (Grafik) und Stellungnahmen von W.G. Stock (Bild), W. Sander-Beuermann (MetaGer) (Bild) u. M. Henzinger (google.de) (Bild)
    Content
    "Wenn Chris Sherman über das Internet spricht, schweift er mitunter ab zu den Sternen. "Wie das Universum ist auch das Web voll dunkler Materie", sagt der Suchmaschinenexperte aus Los Angeles. "Die Astronomen erzählen uns, dass selbst das stärkste Teleskop höchstens zehn Prozent der Himmelskörper im All aufspüren kann. " Der Rest sei dunkel und somit unsichtbar. Genauso verhalte es sich mit Informationen im Web. "Das meiste Wissen", so Sherman, "bleibt selbst den besten Suchmaschinen verborgen." Höchstens ein Zehntel des Internet können die digitalen Spürhunde durchwühlen. Der Rest bleibt unter der Oberfläche im so genannten Deep Web verborgen, verteilt auf Datenbanken, Archive und Foren, oder treibt unverlinkt im Info-Meer - unerreichbar für Suchmaschinen. Eine Studie von Brightplanet, einer US-Firma für Suchtechnologie, rechnet vor, dass im Deep Web 400- bis 550-mal mehr Daten liegen als im oberflächlichen Surface-Web, in dem Google & Co. fischen können." Wenn Informationen die wichtigste Ware im 21. Jahrhundert sind, dann ist das tiefe Web unschätzbar wertvoll", sagt Michael Bergman aus dem Brightplanet-Vorstand. Um ihren Index zu pflegen und zu erweitern, schicken Suchmaschinen ihre Spione, so genannte Spider oder Crawler, durchs Netz. Diese Software-Roboter hangeln sich von Link zu Link und speichern jede neue Seite, die sie erreichen. "Millionen unverlinkter Web-Auftritte oder dynamisch aus Datenbanken erzeugte Dokumente gehen ihnen dabei durch die Maschen", schätzt Wolfgang Sander-Beuermann, Leiter des Suchmaschinenlabors der Uni Hannover. Andere Seiten sperren die Agenten bewusst aus. Ein versteckter Hinweis oder eine Passwortabfrage blockt die Spider ab, zum Beispiel am Eingang zu Firmen-Intranets. An manche Inhalte kommen die Spider nicht heran, weil sie mit deren Datenformat nichts anfangen können: Musikdateien, Bilder und Textdokumente sind schwer verdauliche Brocken für die Agenten, die auf den Internet-Code HTML spezialisiert sind. Den größten Teil des Deep Web füllen "Datenbanken mit gesichertem und für jedermann zugänglichem Wissen", weiß Netz-Ausloter Sherman, der zusammen mit dem Bibliothekar und Informationsspezialisten Gary Price in dem Buch "The Invisible Web" die Tiefenregionen des Internet erstmals für die breite Masse der Anwender sichtbar macht. Zu den wertvollsten Informationsquellen zählen kostenlose Archive, die Kataloge öffentlicher Bibliotheken, Datenbanken von Universitäten, Behörden, Patentämtern oder des Statistischen Bundesamts, ferner Newsgroups, das sind themenspezifische Schwarze Bretter im Netz, und digitale Produktkataloge. "Die Suchmaschinen können nicht in diesen Schätzen stöbem, weil sie erst gar nicht hineingelangen", erklärt Sherman. Vor dem Zugriff zum Beispiel auf das kostenlose Archiv von FOCUS muss der Nutzer per Eingabemaske nach Schlagwörtern recherchieren. Die Crux für Google & Co. bringt Sherman auf den Punkt: "Sie können nicht tippen" -und müssen deshalb draußen bleiben. Dasselbe Spiel beim größten deutschen Buchkatalog: Die digitalen Fahnder finden ihn zwar und führen den Suchenden zur Deutschen Bibliothek unter www.ddb.de. In dem Verzeichnis, das über acht Millionen Druckerzeugnisse listet, muss der Gast dann selbst weitersuchen. Für Suchmaschinen ist der Index unsichtbar. Auch an der gezielten Recherche nach Albert Einsteins Lebenslauf scheitern automatische Findhilfen. So meldet Google zwar 680 000 Treffer für Albert Einstein. Nur die Vita, die neben 25 000 weiteren im Archiv von www.biography.com liegt, findet der beliebte Generalist nicht.
    Auch an die Daten der Flugverbindungen zwischen Berlin und New York kommt Google nicht heran. Die spuckt hingegen www.trip.com binnen Sekunden inklusive Preisen und Buchungsmöglichkeit aus. Um solche Quellen künftig anzuzapfen, verfolgen Suchdienste unterschiedliche Strategien. Die in South Dakota ansässige Firma Brightplanet katalogisiert unter der ambitionierten Adresse www.completeplanet.com nach eigenen Angaben 103 000 Datenbanken und Spezialsuchmaschinen. Dazu verkauft das Unternehmen den Rechercheautomaten Lexibot, ein kleines Programm, das mehr als 4300 Wissenssammlungen auf einen Rutsch abfragen kann. Andere Hersteller bieten ähnliche Software-Agenten, die im Deep Web schürfen (s. Kasten). Auch die klassischen Suchhilfen dringen in immer tiefere Regionen vor. Der deutsche Anbieter Acoon liefert testweise Links zu Musikdateien in der Tauschbörse eDonkey in der Trefferliste. Wolfgang Sander-Beuermann entwickelt derzeit mit Kollegen im Hannoveraner Suchmaschinenlabor das forschungsportal.net "für das deutsche Hochschulwissen, das bei den beliebten Allzwecksuchern in der Treffermasse untergeht", so Sander-Beuermann. Branchenprimus Google kann seit geraumer Zeit News von 4000 ausgewählten Nachrichtenquellen abgreifen, Textdokumente lesen, Fotos und Grafiken finden und in einem riesigen Archiv nach Newsgroups-Einträgen fahnden. "Das Archiv unter groups.google.com beherbergt Foren zu fast jedem denkbaren Thema", erklärt Suchspezialist Sander-Beuermann. "Immer wenn ich im Web nicht weiterkomme, suche ich in diesem Teil des Internet." Den jüngsten Coup landete der beliebte Dienst, der inzwischen fast 3,1 Milliarden Dokumente erfasst hat, vor einigen Tagen mit dem auf Produkte spezialisierten Zusatzangebot froogle.com. "Wir haben Froogle auf vielfachen Wunsch unserer Nutzer entwickelt", erzählt die Leiterin der Google-Forschungsabteilung Monika Henzinger. Auch Konkurrent Altavista fahndet nach Musikdateien, Fotos, Videos und Nachrichten. Eine viel versprechende Strategie verfolgt auch Northem Light. Der Dienst durchsucht gleichzeitig den von Spidem erstellten Index und ausgewählte Spezialdatenbanken. "Solche Hybride vereinigen die unterschiedlichen Welten des Web, ein sinnvoller Ansatz", meint Wolfgang Stock, Professor für Informationswissenschaft an der Uni Düsseldorf und FH Köln. Leider sei der Index teilweise veraltet und recht klein, klagt der Computerexperte, der mit seinen Studenten die Qualität von Suchmaschinen untersucht hat. Den Umfang des in Datenbanken schlummernden Wissens schätzt Stock nüchterner ein als Michael Bergman von Brightplanet: "Das Unternehmen hat nicht die einzelnen Dokumente ausgewertet, sondem den benötigten Speicherplatz ermittelt." Wenn man sich an der Zahl der Datensätze orientiere, sei "deren Größenschätzung wahrscheinlich zehnmal zu hoch", kalkuliert Stock. Solange die meisten Suchdienste nur den kleineren Teil des Internet im Blick haben, bleibt der Expertenstreit über die Größe des gesamten Netzes folgenlos. "Trotz aller Verbesserungen kann keine Suchmaschine alle Anfragen gleichermaßen gut beantworten", sagt der Berliner Suchmaschinenspezialist und Betreiber des Ratgebers at-web.de, Klaus Patzwaldt. "Dazu müssten Computer so intelligent wie Menschen sein." "
    Series
    Internet
    Theme
    Internet
  14. Nait-Baha, L.; Jackiewicz, A.; Djioua, B.; Laublet, P.: Query reformulation for information retrieval on the Web using the point of view methodology : preliminary results (2001) 0.01 
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    Theme
    Internet
  15. Balas, J.: Beyond Veronica and Yahoo! : more Internet search tools (1996) 0.01 
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    Abstract
    Discusses a number of Internet search tools for finding: a local Internet service provider; electronic mail addresses; newsgroups; and mailing lists
    Theme
    Internet
  16. Jepsen, E.T.; Seiden, P.; Ingwersen, P.; Björneborn, L.; Borlund, P.: Characteristics of scientific Web publications : preliminary data gathering and analysis (2004) 0.01 
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    Abstract
    Because of the increasing presence of scientific publications an the Web, combined with the existing difficulties in easily verifying and retrieving these publications, research an techniques and methods for retrieval of scientific Web publications is called for. In this article, we report an the initial steps taken toward the construction of a test collection of scientific Web publications within the subject domain of plant biology. The steps reported are those of data gathering and data analysis aiming at identifying characteristics of scientific Web publications. The data used in this article were generated based an specifically selected domain topics that are searched for in three publicly accessible search engines (Google, AlITheWeb, and AItaVista). A sample of the retrieved hits was analyzed with regard to how various publication attributes correlated with the scientific quality of the content and whether this information could be employed to harvest, filter, and rank Web publications. The attributes analyzed were inlinks, outlinks, bibliographic references, file format, language, search engine overlap, structural position (according to site structure), and the occurrence of various types of metadata. As could be expected, the ranked output differs between the three search engines. Apparently, this is caused by differences in ranking algorithms rather than the databases themselves. In fact, because scientific Web content in this subject domain receives few inlinks, both AItaVista and AlITheWeb retrieved a higher degree of accessible scientific content than Google. Because of the search engine cutoffs of accessible URLs, the feasibility of using search engine output for Web content analysis is also discussed.
    Theme
    Internet
  17. Rowlands, I.; Nicholas, D.; Williams, P.; Huntington, P.; Fieldhouse, M.; Gunter, B.; Withey, R.; Jamali, H.R.; Dobrowolski, T.; Tenopir, C.: ¬The Google generation : the information behaviour of the researcher of the future (2008) 0.01 
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    Footnote
    Vgl. auch: Rowlands, I.: Google generation: issues in information literacy. In: http://www.lucis.me.uk/retrieval%20issues.pdf.
    Theme
    Internet
  18. Tröger, B.: "Und wie halten sie es mit der Internet-Erschließung?" : Bibliothekarische Gretchenfragen von IBIS bis GERHARD (1998) 0.01 
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    Theme
    Internet
  19. Hewett, S.: MathGate - a gateway to Internet resources for mathematicians (2000) 0.01 
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    Theme
    Internet
  20. Kaeser, E.: ¬Das postfaktische Zeitalter (2016) 0.01 
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    Content
    "Es gibt Daten, Informationen und Fakten. Wenn man mir eine Zahlenreihe vorsetzt, dann handelt es sich um Daten: unterscheidbare Einheiten, im Fachjargon: Items. Wenn man mir sagt, dass diese Items stündliche Temperaturangaben der Aare im Berner Marzilibad bedeuten, dann verfüge ich über Information - über interpretierte Daten. Wenn man mir sagt, dies seien die gemessenen Aaretemperaturen am 22. August 2016 im Marzili, dann ist das ein Faktum: empirisch geprüfte interpretierte Daten. Dieser Dreischritt - Unterscheiden, Interpretieren, Prüfen - bildet quasi das Bindemittel des Faktischen, «the matter of fact». Wir alle führen den Dreischritt ständig aus und gelangen so zu einem relativ verlässlichen Wissen und Urteilsvermögen betreffend die Dinge des Alltags. Aber wie schon die Kurzcharakterisierung durchblicken lässt, bilden Fakten nicht den Felsengrund der Realität. Sie sind kritikanfällig, sowohl von der Interpretation wie auch von der Prüfung her gesehen. Um bei unserem Beispiel zu bleiben: Es kann durchaus sein, dass man uns zwei unterschiedliche «faktische» Temperaturverläufe der Aare am 22. August 2016 vorsetzt.
    Date
    24. 8.2016 9:29:24
    Theme
    Internet

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