Search (110 results, page 1 of 6)

  • × theme_ss:"Visualisierung"
  1. Pejtersen, A.M.: Implications of users' value perception for the design of a bibliographic retrieval system (1986) 0.03 
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    Date
    5. 8.2006 10:16:29
  2. Hajdu Barát, A.: Usability and the user interfaces of classical information retrieval languages (2006) 0.03 
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    Abstract
    This paper examines some traditional information searching methods and their role in Hungarian OPACs. What challenges are there in the digital and online environment? How do users work with them and do they give users satisfactory results? What kinds of techniques are users employing? In this paper I examine the user interfaces of UDC, thesauri, subject headings etc. in the Hungarian library. The key question of the paper is whether a universal system or local solutions is the best approach for searching in the digital environment.
    Theme
    Klassifikationssysteme im Online-Retrieval
  3. Vizine-Goetz, D.: DeweyBrowser (2006) 0.02 
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    Abstract
    The DeweyBrowser allows users to search and browse collections of library resources organized by the Dewey Decimal Classification (DDC) system. The visual interface provides access to several million records from the OCLC WorldCat database and to a collection of records derived from the abridged edition of DDC. The prototype was developed out of a desire to make the most of Dewey numbers assigned to library materials and to explore new ways of providing access to the DDC.
    Date
    28. 9.2008 19:16:29
    Footnote
    Beitrag in einem Themenheft "Moving beyond the presentation layer: content and context in the Dewey Decimal Classification (DDC) System"
    Theme
    Klassifikationssysteme im Online-Retrieval
  4. Zhu, Y.; Yan, E.; Song, I.-Y..: ¬The use of a graph-based system to improve bibliographic information retrieval : system design, implementation, and evaluation (2017) 0.02 
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    Abstract
    In this article, we propose a graph-based interactive bibliographic information retrieval system-GIBIR. GIBIR provides an effective way to retrieve bibliographic information. The system represents bibliographic information as networks and provides a form-based query interface. Users can develop their queries interactively by referencing the system-generated graph queries. Complex queries such as "papers on information retrieval, which were cited by John's papers that had been presented in SIGIR" can be effectively answered by the system. We evaluate the proposed system by developing another relational database-based bibliographic information retrieval system with the same interface and functions. Experiment results show that the proposed system executes the same queries much faster than the relational database-based system, and on average, our system reduced the execution time by 72% (for 3-node query), 89% (for 4-node query), and 99% (for 5-node query).
  5. Chowdhury, S.; Chowdhury, G.G.: Using DDC to create a visual knowledge map as an aid to online information retrieval (2004) 0.02 
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    Content
    1. Introduction Web search engines and digital libraries usually expect the users to use search terms that most accurately represent their information needs. Finding the most appropriate search terms to represent an information need is an age old problem in information retrieval. Keyword or phrase search may produce good search results as long as the search terms or phrase(s) match those used by the authors and have been chosen for indexing by the concerned information retrieval system. Since this does not always happen, a large number of false drops are produced by information retrieval systems. The retrieval results become worse in very large systems that deal with millions of records, such as the Web search engines and digital libraries. Vocabulary control tools are used to improve the performance of text retrieval systems. Thesauri, the most common type of vocabulary control tool used in information retrieval, appeared in the late fifties, designed for use with the emerging post-coordinate indexing systems of that time. They are used to exert terminology control in indexing, and to aid in searching by allowing the searcher to select appropriate search terms. A large volume of literature exists describing the design features, and experiments with the use, of thesauri in various types of information retrieval systems (see for example, Furnas et.al., 1987; Bates, 1986, 1998; Milstead, 1997, and Shiri et al., 2002).
    Date
    29. 8.2004 13:37:50
    Theme
    Klassifikationssysteme im Online-Retrieval
  6. Linden, E.J. van der; Vliegen, R.; Wijk, J.J. van: Visual Universal Decimal Classification (2007) 0.02 
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    Abstract
    UDC aims to be a consistent and complete classification system, that enables practitioners to classify documents swiftly and smoothly. The eventual goal of UDC is to enable the public at large to retrieve documents from large collections of documents that are classified with UDC. The large size of the UDC Master Reference File, MRF with over 66.000 records, makes it difficult to obtain an overview and to understand its structure. Moreover, finding the right classification in MRF turns out to be difficult in practice. Last but not least, retrieval of documents requires insight and understanding of the coding system. Visualization is an effective means to support the development of UDC as well as its use by practitioners. Moreover, visualization offers possibilities to use the classification without use of the coding system as such. MagnaView has developed an application which demonstrates the use of interactive visualization to face these challenges. In our presentation, we discuss these challenges, and we give a demonstration of the way the application helps face these. Examples of visualizations can be found below.
    Source
    Extensions and corrections to the UDC. 29(2007), S.297-300
  7. Fowler, R.H.; Wilson, B.A.; Fowler, W.A.L.: Information navigator : an information system using associative networks for display and retrieval (1992) 0.02 
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    Abstract
    Document retrieval is a highly interactive process dealing with large amounts of information. Visual representations can provide both a means for managing the complexity of large information structures and an interface style well suited to interactive manipulation. The system we have designed utilizes visually displayed graphic structures and a direct manipulation interface style to supply an integrated environment for retrieval. A common visually displayed network structure is used for query, document content, and term relations. A query can be modified through direct manipulation of its visual form by incorporating terms from any other information structure the system displays. An associative thesaurus of terms and an inter-document network provide information about a document collection that can complement other retrieval aids. Visualization of these large data structures makes use of fisheye views and overview diagrams to help overcome some of the inherent difficulties of orientation and navigation in large information structures.
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  8. Rudolph, S.; Hemmje, M.: Visualisierung von Thesauri zur interaktiven Unterstüzung von visuellen Anfragen an Textdatenbanken (1994) 0.02 
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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
  9. Pejtersen, A.M.: ¬The BookHouse : an icon based database system for fiction retrieval in public libraries (1992) 0.01 
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  10. Julien, C.-A.; Leide, J.E.; Bouthillier, F.: Controlled user evaluations of information visualization interfaces for text retrieval : literature review and meta-analysis (2008) 0.01 
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    Abstract
    This review describes experimental designs (users, search tasks, measures, etc.) used by 31 controlled user studies of information visualization (IV) tools for textual information retrieval (IR) and a meta-analysis of the reported statistical effects. Comparable experimental designs allow research designers to compare their results with other reports, and support the development of experimentally verified design guidelines concerning which IV techniques are better suited to which types of IR tasks. The studies generally use a within-subject design with 15 or more undergraduate students performing browsing to known-item tasks on sets of at least 1,000 full-text articles or Web pages on topics of general interest/news. Results of the meta-analysis (N = 8) showed no significant effects of the IV tool as compared with a text-only equivalent, but the set shows great variability suggesting an inadequate basis of comparison. Experimental design recommendations are provided which would support comparison of existing IV tools for IR usability testing.
  11. Hemmje, M.: LyberWorld - a 3D graphical user interface for fulltext retrieval (1995) 0.01 
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    Abstract
    LyberWorld is a prototype IR user interface. It implements visualizations of an abstract information space: fulltext. The video demonstrates a visual user interface for the probabilistic fulltext retrieval system INQUERY. Visualizations are used to communicate information search and browsing activities in a natural way by applying metaphors of spatial navigation in abstract information spaces. Visualization tools for exploring information spaces and judging relevance of information items are introduced and an example session demonstrates the prototype. The presence of a spatial model in the user's mind is regarded as an essential contribution towards natural interaction and reduction of cognitive costs during retrieval dialogues.
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  12. Koshman, S.: Comparing usability between a visualization and text-based system for information retrieval (2004) 0.01 
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    Abstract
    This investigation tested the designer assumption that VIBE is a tool for an expert user and asked: what are the effects of user expertise on usability when VIBE's non-traditional interface is compared with a more traditional text-based interface? Three user groups - novices, online searching experts, and VIBE system experts - totaling 31 participants, were asked to use and compare VIBE to a more traditional text-based system, askSam. No significant differences were found; however, significant performance differences were found for some tasks on the two systems. Participants understood the basic principles underlying VIBE although they generally favored the askSam system. The findings suggest that VIBE is a learnable system and its components have pragmatic application to the development of visualized information retrieval systems. Further research is recommended to maximize the retrieval potential of IR visualization systems.
  13. Hemmje, M.; Kunkel, C.; Willett, A.: LyberWorld - a visualization user interface supporting fulltext retrieval (1994) 0.01 
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    Abstract
    LyberWorld is a prototype IR user interface. It implements visualizations of an abstract information space-fulltext. The paper derives a model for such visualizations and an exemplar user interface design is implemented for the probabilistic fulltext retrieval system INQUERY. Visualizations are used to communicate information search and browsing activities in a natural way by applying metaphors of spatial navigation in abstract information spaces. Visualization tools for exploring information spaces and judging relevance of information items are introduced and an example session demonstrates the prototype. The presence of a spatial model in the user's mind and interaction with a system's corresponding display methods is regarded as an essential contribution towards natural interaction and reduction of cognitive costs during e.g. query construction, orientation within the database content, relevance judgement and orientation within the retrieval context.
    Source
    Proceeding SIGIR '94: Proceedings of the 17th annual international ACM SIGIR conference on Research and development in information retrieval
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  14. Eito Brun, R.: Retrieval effectiveness in software repositories : from faceted classifications to software visualization techniques (2006) 0.01 
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    Abstract
    The internal organization of large software projects requires an extraordinary effort in the development and maintenance of repositories made up of software artifacts (business components, data models, functional and technical documentation, etc.). During the software development process, different artifacts are created to help users in the transfer of knowledge and enable communication between workers and teams. The storage, maintenance and publication of these artifacts in knowledge bases - usually referred to as "software repositories" are a useful tool for future software development projects, as they contain the collective, learned experience of the teams and provide the basis to estimate and reuse the work completed in the past. Different techniques similar to those used by the library community have been used in the past to organize these software repositories and help users in the difficult task or identifying and retrieving artifacts (software and documentation). These techniques include software classification - with a special emphasis on faceted classifications, keyword-based retrieval and formal method techniques. The paper discusses the different knowledge organization techniques applied in these repositories to identify and retrieve software artifacts and ensure the reusability of software components and documentation at the different phases of the development process across different projects. An enumeration of the main approaches documented in specialized bibliography is provided.
  15. Koshman, S.: Testing user interaction with a prototype visualization-based information retrieval system (2005) 0.01 
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    Abstract
    The VIBE (Visual Information Browsing Environment) prototype system, which was developed at Molde College in Norway in conjunction with researchers at the University of Pittsburgh, allows users to evaluate documents from a retrieved set that is graphically represented as geometric icons within one screen display. While the formal modeling behind VIBE and other information visualization retrieval systems is weIl known, user interaction with the system is not. This investigation tested the designer assumption that VIBE is a tool for a smart (expert) user and asked: What are the effects of the different levels of user expertise upon VIBE usability? Three user groups including novices, online searching experts, and VIBE system experts totaling 31 participants were tested over two sessions with VIBE. Participants selected appropriate features to complete tasks, but did not always solve the tasks correctly. Task timings improved over repeated use with VIBE and the nontypical visually oriented tasks were resolved more successfully than others. Statistically significant differences were not found among all parameters examined between novices and online experts. The VIBE system experts provided the predicted baseline for this study and the VIBE designer assumption was shown to be correct. The study's results point toward further exploration of cognitive preattentive processing, which may help to understand better the novice/expert paradigm when testing a visualized interface design for information retrieval.
  16. Ahn, J.-w.; Brusilovsky, P.: Adaptive visualization for exploratory information retrieval (2013) 0.01 
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    Abstract
    As the volume and breadth of online information is rapidly increasing, ad hoc search systems become less and less efficient to answer information needs of modern users. To support the growing complexity of search tasks, researchers in the field of information developed and explored a range of approaches that extend the traditional ad hoc retrieval paradigm. Among these approaches, personalized search systems and exploratory search systems attracted many followers. Personalized search explored the power of artificial intelligence techniques to provide tailored search results according to different user interests, contexts, and tasks. In contrast, exploratory search capitalized on the power of human intelligence by providing users with more powerful interfaces to support the search process. As these approaches are not contradictory, we believe that they can re-enforce each other. We argue that the effectiveness of personalized search systems may be increased by allowing users to interact with the system and learn/investigate the problem in order to reach the final goal. We also suggest that an interactive visualization approach could offer a good ground to combine the strong sides of personalized and exploratory search approaches. This paper proposes a specific way to integrate interactive visualization and personalized search and introduces an adaptive visualization based search system Adaptive VIBE that implements it. We tested the effectiveness of Adaptive VIBE and investigated its strengths and weaknesses by conducting a full-scale user study. The results show that Adaptive VIBE can improve the precision and the productivity of the personalized search system while helping users to discover more diverse sets of information.
    Footnote
    Beitrag im Rahmen einer Special section on Human-computer Information Retrieval.
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  17. Wild, F.: Visuelle Verfahren im Information Retrieval (2005) 0.01 
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    Abstract
    Bislang wird dem Studium bestehender Verfahren in der Visualisierung des Document Retrieval von Suchmaschinen zu wenig Aufmerksamkeit geschenkt. Der vorliegende Beitrag widmet sich dem Studium von acht Systemen und Prototypen, um die best-practice-Auslese und die Identifikation erfolgsrelevanter Features und Element zu erleichtern. Er legt dazu ein Modell für das visuelle Information Retrieval in Suchmaschinen vor, beschreibt und analysiert die ausgewählten Verfahren und deduziert Herausforderungen für künftige Forschungen. Die wichtigsten Erkenntnisse dabei sind, dass zwar zu wenig integrale Systeme existieren, die den gesamten Retrievalprozess integriert visuell unterstützen, die vorhandenen aber bereits (trotz ihrer Unvollständigkeit) einen Ausweg aus der linearen Krise der Ergebnispräsentation textbasierter Suchmaschinen aufzeigen. Wenngleich noch nicht alle Informationsbedürfnisse von den untersuchten Verfahren erfüllt werden, so zeichnet sich doch ab, dass insbesondere durch die Innovation von Interaktions- und Manipulationsformen neue Wege beschritten werden, die sich auf Effektivität und Effizienz derRetrievalverfahren auswirken.
    Source
    Information - Wissenschaft und Praxis. 56(2005) H.1, S.29-34
  18. Jäger-Dengler-Harles, I.: Informationsvisualisierung und Retrieval im Fokus der Infromationspraxis (2013) 0.01 
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    Abstract
    Methoden und Techniken der Informationsvisualisierung werden seit ungefähr zwanzig Jahren im Bereich der Informationssuche eingesetzt. In dieser Literaturstudie werden ausgewählte Visualisierungsanwendungen der letzten Jahre vorgestellt. Sie betreffen zum einen den Retrievalprozess, das Boolesche Retrieval, die facettierte Suche, Dokumentbeziehungen, die Zufallssuche und Ergebnisanzeige, zum anderen spezielle Anwendungen wie die kartenbasierte und adaptive Visualisierung, Zitationsnetzwerke und Wissensordnungen. Die Einsatzszenarien für Applikationen der Informationsvisualisierung sind vielfältig. Sie reichen von mobilen kleinformatigen Anwendungen bis zu großformatigen Darstellungen auf hochauflösenden Bildschirmen, von integrativen Arbeitsplätzen für den einzelnen Nutzer bis zur Nutzung interaktiver Oberflächen für das kollaborative Retrieval. Das Konzept der Blended Library wird vorgestellt. Die Übertragbarkeit von Visualisierungsanwendungen auf Bibliothekskataloge wird im Hinblick auf die Nutzung des Kataloginputs und des Angebots an Sucheinstiegen geprüft. Perspektivische Überlegungen zu zukünftigen Entwicklungsschritten von Bibliothekskatalogen sowie zum Einfluss von Visualisierungsanwendungen auf die Informationspraxis werden angestellt.
    Date
    4. 2.2015 9:22:39
  19. Hemmje, M.: Unterstützung von Information-Retrieval-Dialogen mit Informationssystemen durch interaktive Informationsvisualisierung (1999) 0.01 
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    Content
    Gegenstand dieser Arbeit ist die Anforderungsanalyse, die Modellierung, der Entwurf und die exemplarische Realisierung, Integration und Bewertung eines Interaktiven Informationsvisualisierungsmodells zur Unterstützung von Informationsdialogen mit Information-Retrieval-Systemen, von darauf aufbauenden interaktiven Informationsvisualisierungsbeispielen, den dazu korrespondierenden Softwarekomponenten sowie deren integriertem Einsatz und Bewertung in einer exemplarischen Anwendungslösung für die Unterstützung interaktiver visuelldirekt manipulative Informationsdialoge mit einem Informations-Retrieval-System. Die Arbeit enthält den Entwurf und die Implementierung der prototypischen Anwendung LyberWorld zur computergraphischen Visualisierung von inhaltsorientierten Informationsdialogen zwischen naiven Benutzern und Datenbanksystemen mit Information-Retrieval-Funktionen. Im Vordergrund steht dabei das Ziel, naiven Benutzern innerhalb eines visuell direkt manipulativen Informationsdialoges eine Unterstützung bei der Benutzung von Information-Retrieval- und Data-Mining-Funktionen auf der Basis von interaktiven Informationsvisualisierungskomponenten zur Verfügung zu stellen. Bezüglich der kognitiven Effizienz der Benutzung solcher Informationsvisualisierungskomponenten durch einen naiven Benutzer, ist es die Grundannahme der Arbeit, daß bei unveränderter Informations-Retrieval-Basisfunktionalität mit Hilfe einer geeigneten graphischen Benutzungsschnittstelle durch Ausnutzung der menschlichen Fähigkeit zur visuellen Wahrnehmung und direktmanipulativen Interaktion ein natürlicherer und kognitiv effizienterer Informationsdialog erzielt wird, als dies mit herkömmlichen z.B. Formblatt oder formalsprachlich orientierten Interaktionsparadigmen der Fall ist. Aus diesem Grund werden in der Arbeit visuell direkt manipulative Informationsvisualisierungs- und Darstellungsmethoden sowie visuell direkt manipulative Metaphern für elementare Funktionen des Informationsdialoges hergeleitet, implementiert und miteinander integriert.
    Im Gegensatz zu anderen Ansätzen, die Kommando-, Menü- oder Formblatt-orientierte Interaktionsparadigmen verwenden, schlagen wir für die Mensch-Maschine-Schnittstelle von Informationssystemen eine interaktive Informationsvisualisierung vor, bei der den geometrischen, räumlichen und graphischen Attributen der dargestellten Informationsobjekte besondere Bedeutung zukommt. Mehrdimensionale, computergraphische Informationsvisualisierungen des informationellen Kontextes des Informationsdialoges bilden das gemeinsame Kommunikations- und Interaktionsmedium zwischen den konzeptuellen Informationsmodellen und den Information-Retrieval-Funktionen des Systems sowie dem mentalen Modell, das der Benutzer von der Informationsmenge und den Informationsfunktionen des Informationssystems hat. Dabei besteht zwischen den visuell direkt manipulativen computergraphischen Informationsvisualisierungsobjekten der Benutzungsschnittstelle und den Informationsobjekten der Datenbasis eine funktionale Verknüpfung, die dem Benutzer durch die visuelle Ausprägung der graphischen Visualisierungsobjekte und die Verwendung von visuellen Metaphern vermittelt wird. Die automatischen Such- und Bewertungsfunktionen des Datenbank- oder Information-Retrieval-Systems werden ebenfalls in Form visuell direkt manipulativer Interaktionsmechanismen zur Verfügung gestellt.
  20. Frederichs, A.: Natürlichsprachige Abfrage und 3-D-Visualisierung von Wissenszusammenhängen (2007) 0.01 
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    Abstract
    Eine der größten Herausforderungen für alle technischen Anwendungen ist die sogenannte Mensch-Maschine-Schnittstelle, also der Problemkreis, wie der bedienende Mensch mit der zu bedienenden Technik kommunizieren kann. Waren die Benutzungsschnittstellen bis Ende der Achtziger Jahre vor allem durch die Notwendigkeit des Benutzers geprägt, sich an die Erfordernisse der Maschine anzupassen, so wurde mit Durchsetzung grafischer Benutzungsoberflächen zunehmend versucht, die Bedienbarkeit so zu gestalten, dass ein Mensch auch ohne größere Einarbeitung in die Lage versetzt werden sollte, seine Befehle der Technik - letztlich also dem Computer - zu übermitteln. Trotz aller Fortschritte auf diesem Gebiet blieb immer die Anforderung, der Mensch solle auf die ihm natürlichste Art und Weise kommunizieren können, mit menschlicher Sprache. Diese Anforderung gilt gerade auch für das Retrieval von Informationen: Warum ist es nötig, die Nutzung von Booleschen Operatoren zu erlernen, nur um eine Suchanfrage stellen zu können? Ein anderes Thema ist die Frage nach der Visualisierung von Wissenszusammenhängen, die sich der Herausforderung stellt, in einem geradezu uferlos sich ausweitenden Informationsangebot weiterhin den Überblick behalten und relevante Informationen schnellstmöglich finden zu können.
    Date
    25.10.2007 9:51:29
    Source
    Wa(h)re Information: 29. Österreichischer Bibliothekartag Bregenz, 19.-23.9.2006. Hrsg.: Harald Weigel
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval

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