Search (264 results, page 1 of 14)

  • × theme_ss:"Suchtaktik"
  1. Mohan, K.C.: Boolean and nearest neighbour text searching in a multi-strategy retrieval system (1996) 0.04 
    0.03818366 = product of:
  0.089095205 = sum of:
    0.014497695 = weight(_text_:information in 7255) [ClassicSimilarity], result of:
      0.014497695 = score(doc=7255,freq=4.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.21943474 = fieldWeight in 7255, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0625 = fieldNorm(doc=7255)
    0.06087649 = weight(_text_:retrieval in 7255) [ClassicSimilarity], result of:
      0.06087649 = score(doc=7255,freq=8.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.5347345 = fieldWeight in 7255, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0625 = fieldNorm(doc=7255)
    0.013721022 = product of:
      0.041163065 = sum of:
        0.041163065 = weight(_text_:29 in 7255) [ClassicSimilarity], result of:
          0.041163065 = score(doc=7255,freq=2.0), product of:
            0.13239008 = queryWeight, product of:
              3.5176873 = idf(docFreq=3565, maxDocs=44218)
              0.037635546 = queryNorm
            0.31092256 = fieldWeight in 7255, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5176873 = idf(docFreq=3565, maxDocs=44218)
              0.0625 = fieldNorm(doc=7255)
      0.33333334 = coord(1/3)
  0.42857143 = coord(3/7)
    Abstract
    Information retrieval systems based on the Boolean model have been popular for some time. A major challenge to this model has come from the development of approaches based on the vector processing model. Both search strategies are explained and evaluated. Describes an experimental study in an opertational environment to compare the retrieval effectiveness of Boolean and nearest neighbour searching in a multi-strategy retrieval system based on query characteristic variables. Considers the significance of the results of the study
    Source
    Library science with a slant to documentation and information studies. 33(1996) no.1, S.29-38
  2. Xu, Y.: ¬The dynamics of interactive information retrieval behavior : part I: an activity theory perspective (2007) 0.03 
    0.030034572 = product of:
  0.07008067 = sum of:
    0.020342028 = weight(_text_:information in 331) [ClassicSimilarity], result of:
      0.020342028 = score(doc=331,freq=14.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.3078936 = fieldWeight in 331, product of:
          3.7416575 = tf(freq=14.0), with freq of:
            14.0 = termFreq=14.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.046875 = fieldNorm(doc=331)
    0.03954044 = weight(_text_:retrieval in 331) [ClassicSimilarity], result of:
      0.03954044 = score(doc=331,freq=6.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.34732026 = fieldWeight in 331, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.046875 = fieldNorm(doc=331)
    0.0101981945 = product of:
      0.030594582 = sum of:
        0.030594582 = weight(_text_:22 in 331) [ClassicSimilarity], result of:
          0.030594582 = score(doc=331,freq=2.0), product of:
            0.13179328 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.037635546 = queryNorm
            0.23214069 = fieldWeight in 331, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046875 = fieldNorm(doc=331)
      0.33333334 = coord(1/3)
  0.42857143 = coord(3/7)
    Abstract
    Human information-seeking behavior is a topic of increasing interest in many disciplines. However, the dynamics of this behavior remain elusive. The extant research has taken cognitive and behavioral perspectives to study information-seeking behavior, and observed its dynamics in multiple sessions. However, the underlying mechanisms that govern the dynamics of information-seeking behavior are not well understood. With a focus on interactive information retrieval behavior, this study proposes an integrated framework based on activity theory. This framework is not only comprehensive and integrated, but also offers an explanation of the mechanisms governing the interaction between users' cognitive states and their manifested behavior when using an information retrieval system. A set of four propositions are advanced to describe the mechanisms. The implications are discussed.
    Date
    27. 5.2007 13:55:22
    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.7, S.958-970
  3. Crestani, F.; Du, H.: Written versus spoken queries : a qualitative and quantitative comparative analysis (2006) 0.03 
    0.029645378 = product of:
  0.069172546 = sum of:
    0.013316983 = weight(_text_:information in 5047) [ClassicSimilarity], result of:
      0.013316983 = score(doc=5047,freq=6.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.20156369 = fieldWeight in 5047, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.046875 = fieldNorm(doc=5047)
    0.045657367 = weight(_text_:retrieval in 5047) [ClassicSimilarity], result of:
      0.045657367 = score(doc=5047,freq=8.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.40105087 = fieldWeight in 5047, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.046875 = fieldNorm(doc=5047)
    0.0101981945 = product of:
      0.030594582 = sum of:
        0.030594582 = weight(_text_:22 in 5047) [ClassicSimilarity], result of:
          0.030594582 = score(doc=5047,freq=2.0), product of:
            0.13179328 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.037635546 = queryNorm
            0.23214069 = fieldWeight in 5047, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046875 = fieldNorm(doc=5047)
      0.33333334 = coord(1/3)
  0.42857143 = coord(3/7)
    Abstract
    The authors report on an experimental study on the differences between spoken and written queries. A set of written and spontaneous spoken queries are generated by users from written topics. These two sets of queries are compared in qualitative terms and in terms of their retrieval effectiveness. Written and spoken queries are compared in terms of length, duration, and part of speech. In addition, assuming perfect transcription of the spoken queries, written and spoken queries are compared in terms of their aptitude to describe relevant documents. The retrieval effectiveness of spoken and written queries is compared using three different information retrieval models. The results show that using speech to formulate one's information need provides a way to express it more naturally and encourages the formulation of longer queries. Despite that, longer spoken queries do not seem to significantly improve retrieval effectiveness compared with written queries.
    Date
    5. 6.2006 11:22:23
    Source
    Journal of the American Society for Information Science and Technology. 57(2006) no.7, S.881-890
  4. Shah, G.A.; Desai, A.T.; Nagarkar, S.A.: Search strategies : their importance in IR process (1992) 0.03 
    0.02914858 = product of:
  0.068013355 = sum of:
    0.012814272 = weight(_text_:information in 3806) [ClassicSimilarity], result of:
      0.012814272 = score(doc=3806,freq=2.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.19395474 = fieldWeight in 3806, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.078125 = fieldNorm(doc=3806)
    0.038047805 = weight(_text_:retrieval in 3806) [ClassicSimilarity], result of:
      0.038047805 = score(doc=3806,freq=2.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.33420905 = fieldWeight in 3806, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.078125 = fieldNorm(doc=3806)
    0.017151278 = product of:
      0.051453833 = sum of:
        0.051453833 = weight(_text_:29 in 3806) [ClassicSimilarity], result of:
          0.051453833 = score(doc=3806,freq=2.0), product of:
            0.13239008 = queryWeight, product of:
              3.5176873 = idf(docFreq=3565, maxDocs=44218)
              0.037635546 = queryNorm
            0.38865322 = fieldWeight in 3806, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5176873 = idf(docFreq=3565, maxDocs=44218)
              0.078125 = fieldNorm(doc=3806)
      0.33333334 = coord(1/3)
  0.42857143 = coord(3/7)
    Abstract
    Discusses how users' questions should be analysed and appropriate search strategies should be formulated with a view to enhancing the capabilities of a system in retrieval of the most relevant information with a high degree of precision
    Source
    Proceedings of the 15th National IASLIC Conference, Annamalainagar, Tamil Nadu, India, 26-29 December 1992. Ed. by. A. Chatterjee et al
  5. Chamis, A.Y.: Vocabulary control and search strategies in online searching (1991) 0.02 
    0.023942674 = product of:
  0.083799355 = sum of:
    0.022922868 = weight(_text_:information in 820) [ClassicSimilarity], result of:
      0.022922868 = score(doc=820,freq=10.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.3469568 = fieldWeight in 820, product of:
          3.1622777 = tf(freq=10.0), with freq of:
            10.0 = termFreq=10.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0625 = fieldNorm(doc=820)
    0.06087649 = weight(_text_:retrieval in 820) [ClassicSimilarity], result of:
      0.06087649 = score(doc=820,freq=8.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.5347345 = fieldWeight in 820, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0625 = fieldNorm(doc=820)
  0.2857143 = coord(2/7)
    COMPASS
    Information retrieval
    Information retrieval / Use of / On-line computers
    Series
    New directions in information management series; 27
    Subject
    Information retrieval
    Information retrieval / Use of / On-line computers
  6. Spink, A.; Goodrum, A.; Robins, D.: Elicitation behavior during mediated information retrieval (1998) 0.02 
    0.022907685 = product of:
  0.0801769 = sum of:
    0.026909972 = weight(_text_:information in 3265) [ClassicSimilarity], result of:
      0.026909972 = score(doc=3265,freq=18.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.40730494 = fieldWeight in 3265, product of:
          4.2426405 = tf(freq=18.0), with freq of:
            18.0 = termFreq=18.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0546875 = fieldNorm(doc=3265)
    0.053266928 = weight(_text_:retrieval in 3265) [ClassicSimilarity], result of:
      0.053266928 = score(doc=3265,freq=8.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.46789268 = fieldWeight in 3265, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0546875 = fieldNorm(doc=3265)
  0.2857143 = coord(2/7)
    Abstract
    Considers what elicitation or requests for information search intermediaries make of users with information requests during an information retrieval interaction - including prior to and during an information retrieval interaction - and for what purpose. Reports a study of elicitations during 40 mediated information retrieval interactions. Identifies a total of 1.557 search intermediary elicitations within 15 purpose categories. The elicitation purposes of search intermediaries included requests for information on search terms and strategies, database selection, search procedures, system's outputs and relevance of retrieved items, and users' knowledge and previous information seeking. Investigates the transition sequences from 1 type of search intermediary elicitation to another. Compares these findings with results from a study of end user questions
    Source
    Information processing and management. 34(1998) nos.2/3, S.257-273
  7. Saastamoinen, M.; Järvelin, K.: Search task features in work tasks of varying types and complexity (2017) 0.02 
    0.022872388 = product of:
  0.053368907 = sum of:
    0.020342028 = weight(_text_:information in 3589) [ClassicSimilarity], result of:
      0.020342028 = score(doc=3589,freq=14.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.3078936 = fieldWeight in 3589, product of:
          3.7416575 = tf(freq=14.0), with freq of:
            14.0 = termFreq=14.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.046875 = fieldNorm(doc=3589)
    0.022828683 = weight(_text_:retrieval in 3589) [ClassicSimilarity], result of:
      0.022828683 = score(doc=3589,freq=2.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.20052543 = fieldWeight in 3589, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.046875 = fieldNorm(doc=3589)
    0.0101981945 = product of:
      0.030594582 = sum of:
        0.030594582 = weight(_text_:22 in 3589) [ClassicSimilarity], result of:
          0.030594582 = score(doc=3589,freq=2.0), product of:
            0.13179328 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.037635546 = queryNorm
            0.23214069 = fieldWeight in 3589, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046875 = fieldNorm(doc=3589)
      0.33333334 = coord(1/3)
  0.42857143 = coord(3/7)
    Abstract
    Information searching in practice seldom is an end in itself. In work, work task (WT) performance forms the context, which information searching should serve. Therefore, information retrieval (IR) systems development/evaluation should take the WT context into account. The present paper analyzes how WT features: task complexity and task types, affect information searching in authentic work: the types of information needs, search processes, and search media. We collected data on 22 information professionals in authentic work situations in three organization types: city administration, universities, and companies. The data comprise 286 WTs and 420 search tasks (STs). The data include transaction logs, video recordings, daily questionnaires, interviews. and observation. The data were analyzed quantitatively. Even if the participants used a range of search media, most STs were simple throughout the data, and up to 42% of WTs did not include searching. WT's effects on STs are not straightforward: different WT types react differently to WT complexity. Due to the simplicity of authentic searching, the WT/ST types in interactive IR experiments should be reconsidered.
    Source
    Journal of the Association for Information Science and Technology. 68(2017) no.5, S.1111-1123
  8. Mansourian, Y.: Contextual elements and conceptual components of information visibility on the web (2008) 0.02 
    0.020902487 = product of:
  0.04877247 = sum of:
    0.021250067 = weight(_text_:information in 2603) [ClassicSimilarity], result of:
      0.021250067 = score(doc=2603,freq=22.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.32163754 = fieldWeight in 2603, product of:
          4.690416 = tf(freq=22.0), with freq of:
            22.0 = termFreq=22.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0390625 = fieldNorm(doc=2603)
    0.019023903 = weight(_text_:retrieval in 2603) [ClassicSimilarity], result of:
      0.019023903 = score(doc=2603,freq=2.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.16710453 = fieldWeight in 2603, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0390625 = fieldNorm(doc=2603)
    0.008498495 = product of:
      0.025495486 = sum of:
        0.025495486 = weight(_text_:22 in 2603) [ClassicSimilarity], result of:
          0.025495486 = score(doc=2603,freq=2.0), product of:
            0.13179328 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.037635546 = queryNorm
            0.19345059 = fieldWeight in 2603, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0390625 = fieldNorm(doc=2603)
      0.33333334 = coord(1/3)
  0.42857143 = coord(3/7)
    Abstract
    Purpose - This paper aims to report the result of follow-up research on end-users' conceptions of information visibility on the web and their conceptualizations of success and failure in web searching. Design/methodology/approach - The data were collected by a questionnaire followed by a brief interview with the participants. The questionnaire was developed based on the information visibility model suggested by the author in the original study. Fifty-two library and information sciences students from Tarbiat Mollem University (TMU) and Iran University of Medical Sciences (IUMS) in Tehran took part in the study. Findings - The model of information visibility can enable web users to gain a better understanding of their information seeking (IS) outcomes and it can assist them to improve their information literacy skills. The model can provide a theoretical framework to investigate web users' IS behavior and can be used as a diagnostic tool to explore the contextual and conceptual elements affecting the visibility of information for end-users. Research limitations/implications - The paper suggests a visibility learning diary (VLD), which might be useful to measure the efficiency of information literacy training courses. Originality/value - The contextual and conceptual approach of the paper provides a deeper insight into the issue of information visibility, which has received little attention by IS and information retrieval researchers until now.
    Date
    1. 1.2009 10:22:40
  9. Xu, Y.; Liu, C.: ¬The dynamics of interactive information retrieval : part II: an empirical study from the activity theory perspective (2007) 0.02 
    0.02039672 = product of:
  0.07138852 = sum of:
    0.020342028 = weight(_text_:information in 333) [ClassicSimilarity], result of:
      0.020342028 = score(doc=333,freq=14.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.3078936 = fieldWeight in 333, product of:
          3.7416575 = tf(freq=14.0), with freq of:
            14.0 = termFreq=14.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.046875 = fieldNorm(doc=333)
    0.05104649 = weight(_text_:retrieval in 333) [ClassicSimilarity], result of:
      0.05104649 = score(doc=333,freq=10.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.44838852 = fieldWeight in 333, product of:
          3.1622777 = tf(freq=10.0), with freq of:
            10.0 = termFreq=10.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.046875 = fieldNorm(doc=333)
  0.2857143 = coord(2/7)
    Abstract
    Human information-seeking behavior is complicated. Activity theory is a powerful theoretical instrument to untangle the "complications." Based on activity theory, a comprehensive framework is proposed in Part I (Y. Xu, 2007) of this report to describe interactive information retrieval (IIR) behavior. A set of propositions is also proposed to describe the mechanisms governing users' cognitive activity and the interaction between users' cognitive states and manifested retrieval behavior. An empirical study is carried out to verify the propositions. The authors' experimental simulation of 81 participants in one search session indicates the propositions are largely supported. Their findings indicate IIR behavior is planned. Users adopt a divide-and-conquer strategy in information retrieval. The planning of information retrieval activity is also partially manifested in query revision tactics. Users learn from previously read documents. A user's interaction with a system ultimately changes the user's information need and the resulting relevance judgment, but the dynamics of topicality perception and novelty perception occur at different paces.
    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.7, S.987-998
  10. Pejtersen, A.M.: Cognitive engineering in information retrieval domains : merging paradigms? (1995) 0.02 
    0.020344833 = product of:
  0.07120691 = sum of:
    0.017939983 = weight(_text_:information in 3249) [ClassicSimilarity], result of:
      0.017939983 = score(doc=3249,freq=2.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.27153665 = fieldWeight in 3249, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.109375 = fieldNorm(doc=3249)
    0.053266928 = weight(_text_:retrieval in 3249) [ClassicSimilarity], result of:
      0.053266928 = score(doc=3249,freq=2.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.46789268 = fieldWeight in 3249, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.109375 = fieldNorm(doc=3249)
  0.2857143 = coord(2/7)
  11. Yuan, X.; Belkin, N.J.: Evaluating an integrated system supporting multiple information-seeking strategies (2010) 0.02 
    0.019635161 = product of:
  0.06872306 = sum of:
    0.023065692 = weight(_text_:information in 3992) [ClassicSimilarity], result of:
      0.023065692 = score(doc=3992,freq=18.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.34911853 = fieldWeight in 3992, product of:
          4.2426405 = tf(freq=18.0), with freq of:
            18.0 = termFreq=18.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.046875 = fieldNorm(doc=3992)
    0.045657367 = weight(_text_:retrieval in 3992) [ClassicSimilarity], result of:
      0.045657367 = score(doc=3992,freq=8.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.40105087 = fieldWeight in 3992, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.046875 = fieldNorm(doc=3992)
  0.2857143 = coord(2/7)
    Abstract
    Many studies have demonstrated that people engage in a variety of different information behaviors when engaging in information seeking. However, standard information retrieval systems such as Web search engines continue to be designed to support mainly one such behavior, specified searching. This situation has led to suggestions that people would be better served by information retrieval systems which support different kinds of information-seeking strategies. This article reports on an experiment comparing the retrieval effectiveness of an integrated interactive information retrieval (IIR) system which adapts to support different information-seeking strategies with that of a standard baseline IIR system. The experiment, with 32 participants each searching on eight different topics, indicates that using the integrated IIR system resulted in significantly better user satisfaction with search results, significantly more effective interaction, and significantly better usability than that using the baseline system.
    Source
    Journal of the American Society for Information Science and Technology. 61(2010) no.10, S.1987-2010
  12. Ury, C.J.; Johnson, C.V.; Meldrem, J.A.: Teaching a heuristic approach to information retrieval (1997) 0.02 
    0.018156862 = product of:
  0.06354901 = sum of:
    0.020502837 = weight(_text_:information in 831) [ClassicSimilarity], result of:
      0.020502837 = score(doc=831,freq=8.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.3103276 = fieldWeight in 831, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0625 = fieldNorm(doc=831)
    0.043046176 = weight(_text_:retrieval in 831) [ClassicSimilarity], result of:
      0.043046176 = score(doc=831,freq=4.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.37811437 = fieldWeight in 831, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0625 = fieldNorm(doc=831)
  0.2857143 = coord(2/7)
    Abstract
    To become lifelong learners, students must acquire information retrieval skills for future as well as current information needs. Describes how the library use instruction programme at Northwest Missouri State University incorporates a heuristic model in which students continually evaluate and refine their information seeking practices while progressing through all levels of courses in diverse disciplines. Collegial partnerships with departmental faculty and ongoing instructional assessment are essential to the success of the programme
  13. Mayr, P.; Mutschke, P.; Petras, V.; Schaer, P.; Sure, Y.: Applying science models for search (2010) 0.02 
    0.017992003 = product of:
  0.06297201 = sum of:
    0.010251419 = weight(_text_:information in 4663) [ClassicSimilarity], result of:
      0.010251419 = score(doc=4663,freq=2.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.1551638 = fieldWeight in 4663, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0625 = fieldNorm(doc=4663)
    0.052720588 = weight(_text_:retrieval in 4663) [ClassicSimilarity], result of:
      0.052720588 = score(doc=4663,freq=6.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.46309367 = fieldWeight in 4663, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0625 = fieldNorm(doc=4663)
  0.2857143 = coord(2/7)
    Abstract
    The paper proposes three different kinds of science models as value-added services that are integrated in the retrieval process to enhance retrieval quailty. The paper discusses the approaches Search Term Recommendation, Bradfordizing and Author Centrality on a general level and addresses implementation issues of the models within a real-life retrieval environment.
    Source
    Information und Wissen: global, sozial und frei? Proceedings des 12. Internationalen Symposiums für Informationswissenschaft (ISI 2011) ; Hildesheim, 9. - 11. März 2011. Hrsg.: J. Griesbaum, T. Mandl u. C. Womser-Hacker
  14. Koopmans, N.I.: What's your question? : The need for research information from the perspective of different user groups (2002) 0.02 
    0.017921276 = product of:
  0.06272446 = sum of:
    0.021746542 = weight(_text_:information in 3612) [ClassicSimilarity], result of:
      0.021746542 = score(doc=3612,freq=16.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.3291521 = fieldWeight in 3612, product of:
          4.0 = tf(freq=16.0), with freq of:
            16.0 = termFreq=16.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.046875 = fieldNorm(doc=3612)
    0.04097792 = product of:
      0.06146688 = sum of:
        0.030872298 = weight(_text_:29 in 3612) [ClassicSimilarity], result of:
          0.030872298 = score(doc=3612,freq=2.0), product of:
            0.13239008 = queryWeight, product of:
              3.5176873 = idf(docFreq=3565, maxDocs=44218)
              0.037635546 = queryNorm
            0.23319192 = fieldWeight in 3612, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5176873 = idf(docFreq=3565, maxDocs=44218)
              0.046875 = fieldNorm(doc=3612)
        0.030594582 = weight(_text_:22 in 3612) [ClassicSimilarity], result of:
          0.030594582 = score(doc=3612,freq=2.0), product of:
            0.13179328 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.037635546 = queryNorm
            0.23214069 = fieldWeight in 3612, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046875 = fieldNorm(doc=3612)
      0.6666667 = coord(2/3)
  0.2857143 = coord(2/7)
    Abstract
    In this paper results of a field study into the need for research information of different user groups are presented: scientists, policy makers and policy researchers, industry and media. Main questions of semi-structured interviews were: what kind of research information users need, what kind of research information resources are used and which information resources are missing at the moment. User groups are missing for a diversity of reasons the overview of research, experts and institutes in the different scientific fields. Especially for the accessibility and transparency of the scientific world these overviews are reported to be needed. Neither Google nor any of the research institutes or policy research organisations are able to present surveys for different science fields at the moment. Giving users the possibility to search, browse and navigate through accessible and more specialised layers of research information might give answers to different user groups simultaneously.
    Date
    2. 7.2005 12:22:50
    Source
    Gaining insight from research information (CRIS2002): Proceedings of the 6th International Conference an Current Research Information Systems, University of Kassel, August 29 - 31, 2002. Eds: W. Adamczak u. A. Nase
  15. Mandala, R.; Tokunaga, T.; Tanaka, H.: Query expansion using heterogeneous thesauri (2000) 0.02 
    0.017438427 = product of:
  0.061034493 = sum of:
    0.015377128 = weight(_text_:information in 1277) [ClassicSimilarity], result of:
      0.015377128 = score(doc=1277,freq=2.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.23274569 = fieldWeight in 1277, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.09375 = fieldNorm(doc=1277)
    0.045657367 = weight(_text_:retrieval in 1277) [ClassicSimilarity], result of:
      0.045657367 = score(doc=1277,freq=2.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.40105087 = fieldWeight in 1277, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.09375 = fieldNorm(doc=1277)
  0.2857143 = coord(2/7)
    Source
    Information processing and management. 36(2000) no.3, S.361-378
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  16. Kim, S.Y.: Search strategy, search tactics, moves (1995) 0.02 
    0.017212223 = product of:
  0.06024278 = sum of:
    0.022194974 = weight(_text_:information in 622) [ClassicSimilarity], result of:
      0.022194974 = score(doc=622,freq=6.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.3359395 = fieldWeight in 622, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.078125 = fieldNorm(doc=622)
    0.038047805 = weight(_text_:retrieval in 622) [ClassicSimilarity], result of:
      0.038047805 = score(doc=622,freq=2.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.33420905 = fieldWeight in 622, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.078125 = fieldNorm(doc=622)
  0.2857143 = coord(2/7)
    Abstract
    The terms search strategy, search tactics, and moves are used to refer to interaction between an information retrieval system and the user. Examines papers using search strategy, search tactics, moves and analyzes the meaning of these terms. Suggests the need to use strategy and moves in information seeking studies
    Source
    Library and information science. 1995, no.34, S.39-44
  17. Cole, C.: ¬A theory of information need for information retrieval that connects information to knowledge (2011) 0.02 
    0.016075728 = product of:
  0.05626505 = sum of:
    0.029361187 = weight(_text_:information in 4474) [ClassicSimilarity], result of:
      0.029361187 = score(doc=4474,freq=42.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.44440612 = fieldWeight in 4474, product of:
          6.4807405 = tf(freq=42.0), with freq of:
            42.0 = termFreq=42.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0390625 = fieldNorm(doc=4474)
    0.02690386 = weight(_text_:retrieval in 4474) [ClassicSimilarity], result of:
      0.02690386 = score(doc=4474,freq=4.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.23632148 = fieldWeight in 4474, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0390625 = fieldNorm(doc=4474)
  0.2857143 = coord(2/7)
    Abstract
    This article proposes a theory of information need for information retrieval (IR). Information need traditionally denotes the start state for someone seeking information, which includes information search using an IR system. There are two perspectives on information need. The dominant, computer science perspective is that the user needs to find an answer to a well-defined question which is easy for the user to formulate into a query to the system. Ironically, information science's best known model of information need (Taylor, 1968) deems it to be a "black box"-unknowable and nonspecifiable by the user in a query to the information system. Information science has instead devoted itself to studying eight adjacent or surrogate concepts (information seeking, search and use; problem, problematic situation and task; sense making and evolutionary adaptation/information foraging). Based on an analysis of these eight adjacent/surrogate concepts, we create six testable propositions for a theory of information need. The central assumption of the theory is that while computer science sees IR as an information- or answer-finding system, focused on the user finding an answer, an information science or user-oriented theory of information need envisages a knowledge formulation/acquisition system.
    Source
    Journal of the American Society for Information Science and Technology. 62(2011) no.7, S.1216-1231
    Theme
    Information
  18. Looking for information : a survey on research on information seeking, needs, and behavior (2012) 0.02 
    0.01604855 = product of:
  0.056169923 = sum of:
    0.018122118 = weight(_text_:information in 3802) [ClassicSimilarity], result of:
      0.018122118 = score(doc=3802,freq=4.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.27429342 = fieldWeight in 3802, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.078125 = fieldNorm(doc=3802)
    0.038047805 = weight(_text_:retrieval in 3802) [ClassicSimilarity], result of:
      0.038047805 = score(doc=3802,freq=2.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.33420905 = fieldWeight in 3802, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.078125 = fieldNorm(doc=3802)
  0.2857143 = coord(2/7)
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  19. Looking for information : a survey on research on information seeking, needs, and behavior (2016) 0.02 
    0.015755814 = product of:
  0.055145342 = sum of:
    0.022194974 = weight(_text_:information in 3803) [ClassicSimilarity], result of:
      0.022194974 = score(doc=3803,freq=24.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.3359395 = fieldWeight in 3803, product of:
          4.8989797 = tf(freq=24.0), with freq of:
            24.0 = termFreq=24.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0390625 = fieldNorm(doc=3803)
    0.032950368 = weight(_text_:retrieval in 3803) [ClassicSimilarity], result of:
      0.032950368 = score(doc=3803,freq=6.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.28943354 = fieldWeight in 3803, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0390625 = fieldNorm(doc=3803)
  0.2857143 = coord(2/7)
    Abstract
    The 4th edition of this popular and well-cited text is now co-authored, and includes significant changes from earlier texts. Presenting a comprehensive review of over a century of research on information behavior (IB), this book is intended for students in information studies and disciplines interested in research on information activities. The initial two chapters introduce IB as a multi-disciplinary topic, the 3rd provides a brief history of research on information seeking. Chapter four discusses what is meant by the terms "information" and "knowledge. "Chapter five discusses "information needs," and how they are addressed. The 6th chapter identifies many related concepts. Twelve models of information behavior (expanded from earlier editions) are illustrated in chapter seven. Chapter eight reviews various paradigms and theories informing IB research. Chapter nine examines research methods invoked in IB studies and a discussion of qualitative and mixed approaches. The 10th chapter gives examples of IB studies by context. The final chapter looks at strengths and weaknesses, recent trends, and future development.
    RSWK
    Information Retrieval
    Series
    Studies in information
    Subject
    Information Retrieval
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  20. Wilson, T.D.: Models in information behaviour research (1999) 0.02 
    0.01571402 = product of:
  0.05499907 = sum of:
    0.028365603 = weight(_text_:information in 4611) [ClassicSimilarity], result of:
      0.028365603 = score(doc=4611,freq=20.0), product of:
        0.066068366 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.037635546 = queryNorm
        0.42933714 = fieldWeight in 4611, product of:
          4.472136 = tf(freq=20.0), with freq of:
            20.0 = termFreq=20.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0546875 = fieldNorm(doc=4611)
    0.026633464 = weight(_text_:retrieval in 4611) [ClassicSimilarity], result of:
      0.026633464 = score(doc=4611,freq=2.0), product of:
        0.11384433 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.037635546 = queryNorm
        0.23394634 = fieldWeight in 4611, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0546875 = fieldNorm(doc=4611)
  0.2857143 = coord(2/7)
    Abstract
    This paper presents an outline of models of information seeking and other aspects of information behaviour, showing the relationship between communication and information behaviour in general with information seeking and information searching in information retrieval systems. It is suggested that these models address issues at various levels of information behaviour and that they can be related by envisaging a 'nesting' of models. It is also suggested that, within both information seeking research and information searching research, alternative models address similar issues in related ways and that the models are complementary rather than conflicting. Finally, an alternative, problem-solving model is presented, which, it is suggested, provides a basis for relating the models in appropriate research strategies.

Authors

Years

Languages

  • e 257
  • d 4
  • ja 1
  • slv 1
  • More… Less…

Types

  • a 252
  • m 10
  • el 2
  • s 1
  • More… Less…

Themes

Subjects

Classifications