-
Robertson, S.E.; Thompson, C.L.: ¬An operational evaluation of weighting, ranking and relevance feedback via a front-end system (1987)
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Horch, A.; Kett, H.; Weisbecker, A.: Semantische Suchsysteme für das Internet : Architekturen und Komponenten semantischer Suchmaschinen (2013)
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- RSWK
- Suchmaschine / Semantic Web / Information Retrieval
Suchmaschine / Information Retrieval / Ranking / Datenstruktur / Kontextbezogenes System
- Subject
- Suchmaschine / Semantic Web / Information Retrieval
Suchmaschine / Information Retrieval / Ranking / Datenstruktur / Kontextbezogenes System
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Tober, M.; Hennig, L.; Furch, D.: SEO Ranking-Faktoren und Rang-Korrelationen 2014 : Google Deutschland (2014)
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- Abstract
- Dieses Whitepaper beschäftigt sich mit der Definition und Bewertung von Faktoren, die eine hohe Rangkorrelation-Koeffizienz mit organischen Suchergebnissen aufweisen und dient dem Zweck der tieferen Analyse von Suchmaschinen-Algorithmen. Die Datenerhebung samt Auswertung bezieht sich auf Ranking-Faktoren für Google-Deutschland im Jahr 2014. Zusätzlich wurden die Korrelationen und Faktoren unter anderem anhand von Durchschnitts- und Medianwerten sowie Entwicklungstendenzen zu den Vorjahren hinsichtlich ihrer Relevanz für vordere Suchergebnis-Positionen interpretiert.
- Date
- 13. 9.2014 14:45:22
- Source
- http://www.searchmetrics.com/media/documents/knowledge-base/searchmetrics-ranking-faktoren-studie-2014.pdf
-
Siemer, J.A.: ¬An information retrieval expert system prototype for agricultural literature reference database-description and evaluation (1994)
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-
Roßmann, N.: Website-usability : Landtag NRW (2002)
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- Abstract
- Die Studie untersucht die Usability der Homepage des Landtags NordrheinWestfalen. Es wird analysiert, wie benutzerfreundlich die Website ist, ob sie effektiv genutzt werden kann und ob die Inhalte der Site den Erwartungen der Benutzer entsprechen. Drei Evaluationsmethoden finden Einsatz: Ein Thinking-Aloud-Test, eine heuristische Evaluation und eine Availability-Untersuchung. Der hier eingesetzte Thinking-Aloud-Test ist ein Benutzertest, bei dem zwanzig Laien und zwanzig Information Professionals zuerst ihre Erwartungen an die Site äußern und dann anhand der Homepage, unter Beobachtung, Aufgaben bearbeiten. Anschließend geben sie anhand eines Fragebogens eine Beurteilung ab. Die heuristische Evaluation ist eine expertenzentrierte Methode. Usability-Experten stellen Checklisten auf, anhand derer eine Homepage untersucht wird. In dieser Studie finden drei Heuristiken Anwendung. Die Availability-Untersuchung der homepageeigenen Suchmaschine ist eine bibliothekarische Evaluationsmethode, die anhand einer Suche nach Webseiten, von denen bekannt ist, dass ihr Angebot aktiv ist, die Qualität der Suchmaschine hinsichtlich der Erreichbarkeit der Dokumente bestimmt. Die drei Methoden ergänzen einander und decken in ihrer Variation einen großen Pool an Usability-Fehlern auf. Die Ergebnisse: Die Benutzer vermissen auf der Homepage besonders Informationen über den Landeshaushalt, eine Liste der Mitarbeiter mit ihren Zuständigkeiten, Hintergrundinformationen zu aktuellen landespolitischen Themen und Diskussionsforen als Kommunikationsmöglichkeit. Im Durchschnitt liegen die Klickhäufigkeiten für das Lösen einer Aufgabe über denen, die für den kürzesten Weg benötigt werden. Die Abbruch-Quote aufgrund einer nicht lösbar erscheinenden Aufgabe beträgt bei 40 Probanden à sechs Aufgaben 13,33% (32 Abbrüche). In der Abschlussbefragung äußern sich die Testpersonen größtenteils zufrieden. Die Ausnahme stellt der Bereich "Navigation" dar. 40% halten die benötigten Links für schwer auffindbar, 45% aller Probanden wissen nicht jederzeit, an welcher Stelle sie sich befinden.
Auch die heuristische Evaluation deckt Navigationsfehler auf. So ist beispielsweise die ZurückFunktion des Browsers fehlprogrammiert. Der Zurück-Button muss stets zwei- statt einmal betätigt werden, wenn man möchte, dass sich nicht nur ein Frame "zurückbewegt". Außerdem werden die Hierarchieebenen nicht deutlich genug hervorgehoben. Bereits besuchte Links unterscheiden sich farblich nicht von solchen, die noch nicht angeklickt wurden. Viele Fotos dienen weniger der Verständlichkeit der Texte als ästhetischen Zwecken. Interne Abkürzungen werden nicht immer aufgelöst und sind somit für den Benutzer unverständlich. Die Suchmaschine erreicht eine Availability von nur 60%, was auf den großen Anteil der Texte der Landtagszeitschrift in der Datenbasis und die Berücksichtigung von Worthäufigkeiten beim Relevance Ranking zurückzuführen ist. Die Kritikpunkte und Änderungsvorschläge beziehen sich nicht so sehr auf die Gesamtstruktur der Homepage, sondern auf viele Details. Auch wenn es scheint, als handele es sich bei einigen Punkten nur um Geringfügigkeiten, so wird die Umsetzung dieser Details, festgehalten im Usability-Report, für die Benutzerfreundlichkeit ein großer Gewinn werden.
-
Pejtersen, A.M.: Interfaces based on associative semantics for browsing in information retrieval (1990)
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- Abstract
- Explores the extent to which techniques of word association can be applied to the development of interfaces for data browsing and searching for which the present methods are either not adequate or completely ineffective. Focuses on the development, application and evaluation of aids for browsing associative semantics displayed textually in interfaces as a network of related terms, or displayed visually as a network of terms and pictures
-
Mutschke, P.: Autorennetzwerke : Verfahren zur Netzwerkanalyse als Mehrwertdienste für Informationssysteme (2004)
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- Abstract
- Virtuelle Bibliotheken enthalten eine Fülle an Informationen, die in ihrer Vielfalt und Tiefe von Standardsuchmaschinen nicht erschöpfend erfasst wird. Der Arbeitsbericht informiert über Entwicklungen am IZ, die darauf abzielen, Wissen über das Interaktionsgeschehen in wissenschaftlichen Communities und den sozialen Status ihrer Akteure für das Retrieval auszunutzen. Grundlage hierfür sind soziale Netzwerke, die sich durch Kooperation der wissenschaftlichen Akteure konstituieren und in den Dokumenten der Datenbasis z.B. als Koautorbeziehungen repräsentiert sind (Autorennetzwerke). Die in dem Bericht beschriebenen Studien zur Small-World-Topologie von Autorennetzwerken zeigen, dass diese Netzwerke ein erhebliches Potential für Informationssysteme haben. Der Bericht diskutiert Szenarios, die beschreiben, wie Autorennetzwerke und hier insbesondere das Konzept der Akteurszentralität für die Informationssuche in Datenbanken sinnvoll genutzt werden können. Kernansatz dieser Retrievalmodelle ist die Suche nach Experten und das Ranking von Dokumenten auf der Basis der Zentralität von Autoren in Autorennetzwerken.
-
Treglown, M.: HIBROWSE for bibliographic databases : a study of the application of usability techniques in view-based searching (1997)
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- Abstract
- View based searching and multi view searching using HIBROWSE proposes a new paradigm for information retrieval from bibliographic databases and database management systems. The paradigm replaces command line and form based interaction with query specification and interaction which requires the user to identify views relating to query facets of the subject of their query. Attempted to apply techniques from human-computer interaction design in the development, construction and usability evaluation of a view based searching system for a very large bibliographic database. As the development of the HIBROWSE system had been in progress before usability became a major concern, as well as the class of system being developed, greater progress towards improved usability was made by adopting a less structured development life-cycle. Examined the usefulness of a number of usability evaluation methods in the context of trying to determine the usability of designs in interactive information retrieval systems. Measurement of the subjective usability of prototypes reinforced the finding of users' difficulties in forming a useful account of the system behaviour and functionality from the training material provided, highlighted some aspects of the system that could be improved, and the greater usability of the HIBROWSE prototypes over an extant commercial bibliographic database system
-
Walker, S.; DeVere, R.: Improving subject retrieval in online catalogues : T.2: Relevance feedback and query expansion (1990)
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- Content
- 1. Introduction // 2. Query modification through relevance feedback // 3. System design & description 4. Evaluation // 5. Analysis & results // 6. Conclusions and recommendations
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Freeman, R.R.: Research project for the evaluation of the UDC as the indexing language for a mechanized reference retrieval system : progress report for the period July 1, 1965 - Jan. 31, 1966 (1966)
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-
Hancock-Beaulieu, M.; Fieldhouse, M.; Do, T.: ¬A graphical interface for OKAPI : the design and evaluation of an online catalogue system with direct manipulation interaction for subject access (1994)
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- Abstract
- A project to design a graphical user interface for the OKAPI online catalogue search system which uses the basic term weighting probabilistic search engine. Presents a research context of the project with a discussion of interface and functionality issues relating to the design of OPACs. Describes the design methodology and evaluation methodology. Presents the preliminary results of the field trial evaluation. Considers problems encountered in the field trial and discusses contributory factors to the effectiveness of interactive query expansion. Highlights the tension between usability and functionality in highly interactive retrieval and suggests further areas of research
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Fuhr, N.: Hypertext und Information-Retrieval (1990)
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-
Booth, A.: Qualitative evaluation of information technology in communication systems (1988)
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- Abstract
- Reports the results of a preliminary investigation of techniques of evaluation applied to information technology based communication systems such as: electronic mail; facsimile transmission (fax); voice mail; and teleconferencing. The aim of the study was to develop a methodology for the consistent and systematic evaluation of such systems using qualitative factors as the basis for the evaluation framework. Concludes that: there is no reported framework within the literature surveyed that deals adequately with the evaluation of information technolgy based communications systems; it is possible the generate evaluation methodologies that can be used consistently and systematically in decision making about information technology based communication systems; and substantial further work is rrequired to validate and develop the recommended methodologies
-
Belkin, N.J.; Vickery, A.: Interaction in information systems : a review of research from document retrieval to knowledge-based systems (1985)
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- Series
- Library and information science report; 35
-
Markey, K.; Demeyer, A.N.: Dewey Decimal Classification online project: evaluation of a library schedule and index integrated into the subject searching capabilities of an online catalog : final report to the Council of Library Resources (1986)
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- Theme
- Klassifikationssysteme im Online-Retrieval
-
Studer, R.; Studer, H.-P.; Studer, A.: Semantisches Knowledge Retrieval (2001)
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- Abstract
- Dieses Whitepaper befasst sich mit der Integration semantischer Technologien in bestehende Ansätze des Information Retrieval und die damit verbundenen weitreichenden Auswirkungen auf Effizienz und Effektivität von Suche und Navigation in Dokumenten. Nach einer Einbettung in die Problematik des Wissensmanagement aus Sicht der Informationstechnik folgt ein Überblick zu den Methoden des Information Retrieval. Anschließend werden die semantischen Technologien "Wissen modellieren - Ontologie" und "Neues Wissen ableiten - Inferenz" vorgestellt. Ein Integrationsansatz wird im Folgenden diskutiert und die entstehenden Mehrwerte präsentiert. Insbesondere ergeben sich Erweiterungen hinsichtlich einer verfeinerten Suchunterstützung und einer kontextbezogenen Navigation sowie die Möglichkeiten der Auswertung von regelbasierten Zusammenhängen und einfache Integration von strukturierten Informationsquellen. Das Whitepaper schließt mit einem Ausblick auf die zukünftige Entwicklung des WWW hin zu einem Semantic Web und die damit verbundenen Implikationen für semantische Technologien.
- Content
- Inhalt: 1. Einführung - 2. Wissensmanagement - 3. Information Retrieval - 3.1. Methoden und Techniken - 3.2. Information Retrieval in der Anwendung - 4. Semantische Ansätze - 4.1. Wissen modellieren - Ontologie - 4.2. Neues Wissen inferieren - 5. Knowledge Retrieval in der Anwendung - 6. Zukunftsaussichten - 7. Fazit
-
Rudolph, S.; Hemmje, M.: Visualisierung von Thesauri zur interaktiven Unterstüzung von visuellen Anfragen an Textdatenbanken (1994)
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- Abstract
- In der folgenden Studie wird eine Komponente für eine visuelle Benutzerschnittstelle zu Textdatenbanken entworfen. Mit Hilfe einer Terminologievisualisierung wird dem Benutzer eine Hilfestellung bei der Relevanzbewertung von Dokumenten und bei der Erweiterung seiner visuellen Anfrage an das Retrieval-System gegeben. Dazu werden zuerst die grundlegenden Information-Retrieval-Modelle eingehender vorgestellt, d.h., generelle Retrieval-Modelle, Retrievaloperationen und spezielle Retrieval-Modelle wie Text-Retrieval werden erläutert. Die Funktionalität eines Text-Retrieval-Systems wird vorgestellt. Darüber hinaus werden bereits existierende Implementierungen visueller Information-Retrieval-Benutzerschnittstellen vorgestellt. Im weiteren Verlauf der Arbeit werden mögliche Visualisierungen der mit Hilfe eines Text-Retrieval-Systems gefundenen Dokumente aufgezeigt. Es werden mehrere Vorschläge zur Visualisierung von Thesauri diskutiert. Es wird gezeigt, wie neuronale Netze zur Kartierung eines Eingabebereiches benutzt werden können. Klassifikationsebenen einer objekt-orientierten Annäherung eines Information-Retrieval-Systems werden vorgestellt. In diesem Zusammenhang werden auch die Eigenschaften von Thesauri sowie die Architektur und Funktion eines Parsersystems erläutert. Mit diesen Voraussetzung wird die Implementierung einer visuellen Terminologierunterstützung realisiert. Abschließend wird ein Fazit zur vorgestellten Realisierung basierend auf einem Drei-Schichten-Modell von [Agosti et al. 1990] gezogen.
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Schardt-Sahelijo, L.P.; Pastowsky, M.: ¬Der iARD-Marktreport : optoelektronische Systeme für Imageverarbeitung, Archivierung, Information Retrieval, Dokumenten-Management (1994)
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-
ELINOR : Electronic Library Project (1998)
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- Abstract
- Describes the final phase of the work on the ELINOR (Electronic Library INformation Online Retrieval) project at De Montfort University, Leicester, which concluded in 1996. ELINOR was 2 phase project with 3 overall goals: to create a practical pilot system based on a commercial product (Excalibur EFS); to investigate the expansion of a small scale electronic library to a larger, distributed library system; and to develop a more efficient and effective means of accessing and sharing resources within a networked multi campus institution. ELINOR was successful in demonstrating that libraries may conveniently digitize and supply smal collections of high demand materials over a campus network in text anf TIFF format. Operational conditions have so far indicated that the barriers are not technological but involve copyright, use issues and sustainability
- Series
- British Library Research and Innovation Centre (BLRIC) report; 22
-
McCormick, A.; Sutton, A.: Open learning and the Internet in public libraries (1998)
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- Abstract
- Presents the findings of the South Ayrshire Libraries OPen Learning and the Internet project, Sep 1997 to Oct 1998. The objective was to demonstrate how open learning materials available on the Internet could be integrated with the provision of local open learning resources to provide an enhanced learning environment in public libraries. The main areas of concentration within the project were information skills support to public library users and the provision of WWW based independent materials to learners. The organisation and retrieval of Web based resources for local use was a major issue throughout the project. Recommends the adoption of Dublin Core metadata standards, the connection of databases of resources with searchable wen pages, and the development of thesauri of terms used to index the Web based resources locally. Sstaff training, and the new skills which will need to be developed, were identified as issues. Cost was also identified as a related issue, extending to issues such as access to open learning material and the Internet
- Date
- 22. 5.1999 18:55:19
