-
Li, L.; Shang, Y.; Zhang, W.: Improvement of HITS-based algorithms on Web documents
0.44
0.43814868 = product of:
0.7667602 = sum of:
0.034518216 = product of:
0.17259108 = sum of:
0.17259108 = weight(_text_:3a in 2514) [ClassicSimilarity], result of:
0.17259108 = score(doc=2514,freq=2.0), product of:
0.3070917 = queryWeight, product of:
8.478011 = idf(docFreq=24, maxDocs=44218)
0.03622214 = queryNorm
0.56201804 = fieldWeight in 2514, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
8.478011 = idf(docFreq=24, maxDocs=44218)
0.046875 = fieldNorm(doc=2514)
0.2 = coord(1/5)
0.24408065 = weight(_text_:2f in 2514) [ClassicSimilarity], result of:
0.24408065 = score(doc=2514,freq=4.0), product of:
0.3070917 = queryWeight, product of:
8.478011 = idf(docFreq=24, maxDocs=44218)
0.03622214 = queryNorm
0.7948135 = fieldWeight in 2514, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
8.478011 = idf(docFreq=24, maxDocs=44218)
0.046875 = fieldNorm(doc=2514)
0.24408065 = weight(_text_:2f in 2514) [ClassicSimilarity], result of:
0.24408065 = score(doc=2514,freq=4.0), product of:
0.3070917 = queryWeight, product of:
8.478011 = idf(docFreq=24, maxDocs=44218)
0.03622214 = queryNorm
0.7948135 = fieldWeight in 2514, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
8.478011 = idf(docFreq=24, maxDocs=44218)
0.046875 = fieldNorm(doc=2514)
0.24408065 = weight(_text_:2f in 2514) [ClassicSimilarity], result of:
0.24408065 = score(doc=2514,freq=4.0), product of:
0.3070917 = queryWeight, product of:
8.478011 = idf(docFreq=24, maxDocs=44218)
0.03622214 = queryNorm
0.7948135 = fieldWeight in 2514, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
8.478011 = idf(docFreq=24, maxDocs=44218)
0.046875 = fieldNorm(doc=2514)
0.5714286 = coord(4/7)
- Content
- Vgl.: http%3A%2F%2Fdelab.csd.auth.gr%2F~dimitris%2Fcourses%2Fir_spring06%2Fpage_rank_computing%2Fp527-li.pdf. Vgl. auch: http://www2002.org/CDROM/refereed/643/.
-
Ardo, A.; Lundberg, S.: ¬A regional distributed WWW search and indexing service : the DESIRE way (1998)
0.01
0.012161928 = product of:
0.042566746 = sum of:
0.027843947 = product of:
0.069609866 = sum of:
0.02197135 = weight(_text_:retrieval in 4190) [ClassicSimilarity], result of:
0.02197135 = score(doc=4190,freq=2.0), product of:
0.109568894 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03622214 = queryNorm
0.20052543 = fieldWeight in 4190, 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=4190)
0.047638513 = weight(_text_:system in 4190) [ClassicSimilarity], result of:
0.047638513 = score(doc=4190,freq=8.0), product of:
0.11408355 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.03622214 = queryNorm
0.41757566 = fieldWeight in 4190, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.046875 = fieldNorm(doc=4190)
0.4 = coord(2/5)
0.0147228 = product of:
0.0294456 = sum of:
0.0294456 = weight(_text_:22 in 4190) [ClassicSimilarity], result of:
0.0294456 = score(doc=4190,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.23214069 = fieldWeight in 4190, 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=4190)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Abstract
- Creates an open, metadata aware system for distributed, collaborative WWW indexing. The system has 3 main components: a harvester (for collecting information), a database (for making the collection searchable), and a user interface (for making the information available). all components can be distributed across networked computers, thus supporting scalability. The system is metadata aware and thus allows searches on several fields including title, document author and URL. Nordic Web Index (NWI) is an application using this system to create a regional Nordic Web-indexing service. NWI is built using 5 collaborating service points within the Nordic countries. The NWI databases can be used to build additional services
- Date
- 1. 8.1996 22:08:06
- Theme
- Klassifikationssysteme im Online-Retrieval
-
Garcés, P.J.; Olivas, J.A.; Romero, F.P.: Concept-matching IR systems versus word-matching information retrieval systems : considering fuzzy interrelations for indexing Web pages (2006)
0.01
0.011666763 = product of:
0.040833667 = sum of:
0.028564667 = product of:
0.07141167 = sum of:
0.031712912 = weight(_text_:retrieval in 5288) [ClassicSimilarity], result of:
0.031712912 = score(doc=5288,freq=6.0), product of:
0.109568894 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03622214 = queryNorm
0.28943354 = fieldWeight in 5288, 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=5288)
0.03969876 = weight(_text_:system in 5288) [ClassicSimilarity], result of:
0.03969876 = score(doc=5288,freq=8.0), product of:
0.11408355 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.03622214 = queryNorm
0.3479797 = fieldWeight in 5288, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.0390625 = fieldNorm(doc=5288)
0.4 = coord(2/5)
0.0122690005 = product of:
0.024538001 = sum of:
0.024538001 = weight(_text_:22 in 5288) [ClassicSimilarity], result of:
0.024538001 = score(doc=5288,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.19345059 = fieldWeight in 5288, 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=5288)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Abstract
- This article presents a semantic-based Web retrieval system that is capable of retrieving the Web pages that are conceptually related to the implicit concepts of the query. The concept of concept is managed from a fuzzy point of view by means of semantic areas. In this context, the proposed system improves most search engines that are based on matching words. The key of the system is to use a new version of the Fuzzy Interrelations and Synonymy-Based Concept Representation Model (FIS-CRM) to extract and represent the concepts contained in both the Web pages and the user query. This model, which was integrated into other tools such as the Fuzzy Interrelations and Synonymy based Searcher (FISS) metasearcher and the fz-mail system, considers the fuzzy synonymy and the fuzzy generality interrelations as a means of representing word interrelations (stored in a fuzzy synonymy dictionary and ontologies). The new version of the model, which is based on the study of the cooccurrences of synonyms, integrates a soft method for disambiguating word senses. This method also considers the context of the word to be disambiguated and the thematic ontologies and sets of synonyms stored in the dictionary.
- Date
- 22. 7.2006 17:14:12
- Footnote
- Beitrag in einer Special Topic Section on Soft Approaches to Information Retrieval and Information Access on the Web
-
Chen, L.-C.: Next generation search engine for the result clustering technology (2012)
0.01
0.010567299 = product of:
0.036985546 = sum of:
0.022262746 = product of:
0.055656865 = sum of:
0.02197135 = weight(_text_:retrieval in 105) [ClassicSimilarity], result of:
0.02197135 = score(doc=105,freq=2.0), product of:
0.109568894 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03622214 = queryNorm
0.20052543 = fieldWeight in 105, 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=105)
0.033685513 = weight(_text_:system in 105) [ClassicSimilarity], result of:
0.033685513 = score(doc=105,freq=4.0), product of:
0.11408355 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.03622214 = queryNorm
0.29527056 = fieldWeight in 105, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.046875 = fieldNorm(doc=105)
0.4 = coord(2/5)
0.0147228 = product of:
0.0294456 = sum of:
0.0294456 = weight(_text_:22 in 105) [ClassicSimilarity], result of:
0.0294456 = score(doc=105,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.23214069 = fieldWeight in 105, 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=105)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Abstract
- Result clustering has recently attracted a lot of attention to provide the users with a succinct overview of relevant search results than traditional search engines. This chapter proposes a mixed clustering method to organize all returned search results into a hierarchical tree structure. The clustering method accomplishes two main tasks, one is label construction and the other is tree building. This chapter uses precision to measure the quality of clustering results. According to the results of experiments, the author preliminarily concluded that the performance of the system is better than many other well-known commercial and academic systems. This chapter makes several contributions. First, it presents a high performance system based on the clustering method. Second, it develops a divisive hierarchical clustering algorithm to organize all returned snippets into hierarchical tree structure. Third, it performs a wide range of experimental analyses to show that almost all commercial systems are significantly better than most current academic systems.
- Date
- 17. 4.2012 15:22:11
- Source
- Next generation search engines: advanced models for information retrieval. Eds.: C. Jouis, u.a
-
Peereboom, M.: DutchESS : Dutch Electronic Subject Service - a Dutch national collaborative effort (2000)
0.01
0.007976091 = product of:
0.027916316 = sum of:
0.008285915 = product of:
0.04142957 = sum of:
0.04142957 = weight(_text_:retrieval in 4869) [ClassicSimilarity], result of:
0.04142957 = score(doc=4869,freq=4.0), product of:
0.109568894 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03622214 = queryNorm
0.37811437 = fieldWeight in 4869, 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=4869)
0.2 = coord(1/5)
0.0196304 = product of:
0.0392608 = sum of:
0.0392608 = weight(_text_:22 in 4869) [ClassicSimilarity], result of:
0.0392608 = score(doc=4869,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.30952093 = fieldWeight in 4869, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=4869)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Abstract
- This article gives an overview of the design and organisation of DutchESS, a Dutch information subject gateway created as a national collaborative effort of the National Library and a number of academic libraries. The combined centralised and distributed model of DutchESS is discussed, as well as its selection policy, its metadata format, classification scheme and retrieval options. Also some options for future collaboration on an international level are explored
- Date
- 22. 6.2002 19:39:23
- Theme
- Klassifikationssysteme im Online-Retrieval
-
Chaudiron, S.; Ihadjadene, M.: Studying Web search engines from a user perspective : key concepts and main approaches (2012)
0.01
0.007866439 = product of:
0.027532537 = sum of:
0.015263537 = product of:
0.03815884 = sum of:
0.01830946 = weight(_text_:retrieval in 109) [ClassicSimilarity], result of:
0.01830946 = score(doc=109,freq=2.0), product of:
0.109568894 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03622214 = queryNorm
0.16710453 = fieldWeight in 109, 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=109)
0.01984938 = weight(_text_:system in 109) [ClassicSimilarity], result of:
0.01984938 = score(doc=109,freq=2.0), product of:
0.11408355 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.03622214 = queryNorm
0.17398985 = fieldWeight in 109, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.0390625 = fieldNorm(doc=109)
0.4 = coord(2/5)
0.0122690005 = product of:
0.024538001 = sum of:
0.024538001 = weight(_text_:22 in 109) [ClassicSimilarity], result of:
0.024538001 = score(doc=109,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.19345059 = fieldWeight in 109, 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=109)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Abstract
- This chapter shows that the wider use of Web search engines, reconsidering the theoretical and methodological frameworks to grasp new information practices. Beginning with an overview of the recent challenges implied by the dynamic nature of the Web, this chapter then traces the information behavior related concepts in order to present the different approaches from the user perspective. The authors pay special attention to the concept of "information practice" and other related concepts such as "use", "activity", and "behavior" largely used in the literature but not always strictly defined. The authors provide an overview of user-oriented studies that are meaningful to understand the different contexts of use of electronic information access systems, focusing on five approaches: the system-oriented approaches, the theories of information seeking, the cognitive and psychological approaches, the management science approaches, and the marketing approaches. Future directions of work are then shaped, including social searching and the ethical, cultural, and political dimensions of Web search engines. The authors conclude considering the importance of Critical theory to better understand the role of Web Search engines in our modern society.
- Date
- 20. 4.2012 13:22:37
- Source
- Next generation search engines: advanced models for information retrieval. Eds.: C. Jouis, u.a
-
Amato, G.; Rabitti, F.; Savino, P.: Multimedia document search on the Web (1998)
0.01
0.007282694 = product of:
0.025489427 = sum of:
0.0058590267 = product of:
0.029295133 = sum of:
0.029295133 = weight(_text_:retrieval in 3605) [ClassicSimilarity], result of:
0.029295133 = score(doc=3605,freq=2.0), product of:
0.109568894 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03622214 = queryNorm
0.26736724 = fieldWeight in 3605, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=3605)
0.2 = coord(1/5)
0.0196304 = product of:
0.0392608 = sum of:
0.0392608 = weight(_text_:22 in 3605) [ClassicSimilarity], result of:
0.0392608 = score(doc=3605,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.30952093 = fieldWeight in 3605, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=3605)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Abstract
- Presents a multimedia model which describes the various multimedia components, their structure and their relationships with a pre-defined taxonomy of concepts, in order to support search engine information retrieval process
- Date
- 1. 8.1996 22:08:06
-
Gardner, T.; Iannella, R.: Architecture and software solutions (2000)
0.01
0.007282694 = product of:
0.025489427 = sum of:
0.0058590267 = product of:
0.029295133 = sum of:
0.029295133 = weight(_text_:retrieval in 4867) [ClassicSimilarity], result of:
0.029295133 = score(doc=4867,freq=2.0), product of:
0.109568894 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03622214 = queryNorm
0.26736724 = fieldWeight in 4867, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=4867)
0.2 = coord(1/5)
0.0196304 = product of:
0.0392608 = sum of:
0.0392608 = weight(_text_:22 in 4867) [ClassicSimilarity], result of:
0.0392608 = score(doc=4867,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.30952093 = fieldWeight in 4867, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=4867)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Abstract
- The current subject gateways have evolved over time when the discipline of Internet resource discovery was in its infancy. This is reflected by the lack of well-established, light-weight, deployable, easy-to-use, standards for metadata and information retrieval. We provide an introduction to the architecture, standards and software solutions in use by subject gateways, and to the issues that must be addressed to support future subject gateways
- Date
- 22. 6.2002 19:38:24
-
Hancock, B.: Subject-specific search engines : using the Harvest system to gather and maintain information on the Internet (1998)
0.01
0.0071533015 = product of:
0.025036555 = sum of:
0.007859954 = product of:
0.039299767 = sum of:
0.039299767 = weight(_text_:system in 3238) [ClassicSimilarity], result of:
0.039299767 = score(doc=3238,freq=4.0), product of:
0.11408355 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.03622214 = queryNorm
0.34448233 = fieldWeight in 3238, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.0546875 = fieldNorm(doc=3238)
0.2 = coord(1/5)
0.0171766 = product of:
0.0343532 = sum of:
0.0343532 = weight(_text_:22 in 3238) [ClassicSimilarity], result of:
0.0343532 = score(doc=3238,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.2708308 = fieldWeight in 3238, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=3238)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Abstract
- The increasing expansion of the Internet has made resources available to users in sometimes unmanageable abundance. To help users manage this proliferation of information, librarians have begun to add URLs to their home pages. As well, specialized search engines are being used to retrieve information from selected sources in aneffort to return pertinent results. Describes the Harvest system which has been used to develop Index Antiquus, a specialized engine, for the classics and mediaeval studies. Presents a working example of how to search Index Antiquus
- Date
- 6. 3.1997 16:22:15
-
Hsieh-Yee, I.: ¬The retrieval power of selected search engines : how well do they address general reference questions and subject questions? (1998)
0.01
0.006979079 = product of:
0.024426775 = sum of:
0.007250175 = product of:
0.036250874 = sum of:
0.036250874 = weight(_text_:retrieval in 2186) [ClassicSimilarity], result of:
0.036250874 = score(doc=2186,freq=4.0), product of:
0.109568894 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03622214 = queryNorm
0.33085006 = fieldWeight in 2186, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=2186)
0.2 = coord(1/5)
0.0171766 = product of:
0.0343532 = sum of:
0.0343532 = weight(_text_:22 in 2186) [ClassicSimilarity], result of:
0.0343532 = score(doc=2186,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.2708308 = fieldWeight in 2186, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=2186)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- 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
-
Wiley, D.L.: Beyond information retrieval : ways to provide content in context (1998)
0.01
0.006979079 = product of:
0.024426775 = sum of:
0.007250175 = product of:
0.036250874 = sum of:
0.036250874 = weight(_text_:retrieval in 3647) [ClassicSimilarity], result of:
0.036250874 = score(doc=3647,freq=4.0), product of:
0.109568894 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03622214 = queryNorm
0.33085006 = fieldWeight in 3647, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=3647)
0.2 = coord(1/5)
0.0171766 = product of:
0.0343532 = sum of:
0.0343532 = weight(_text_:22 in 3647) [ClassicSimilarity], result of:
0.0343532 = score(doc=3647,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.2708308 = fieldWeight in 3647, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=3647)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- 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
-
Bouidghaghen, O.; Tamine, L.: Spatio-temporal based personalization for mobile search (2012)
0.01
0.006717526 = product of:
0.023511339 = sum of:
0.00878854 = product of:
0.0439427 = sum of:
0.0439427 = weight(_text_:retrieval in 108) [ClassicSimilarity], result of:
0.0439427 = score(doc=108,freq=8.0), product of:
0.109568894 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03622214 = queryNorm
0.40105087 = fieldWeight in 108, 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=108)
0.2 = coord(1/5)
0.0147228 = product of:
0.0294456 = sum of:
0.0294456 = weight(_text_:22 in 108) [ClassicSimilarity], result of:
0.0294456 = score(doc=108,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.23214069 = fieldWeight in 108, 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=108)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Abstract
- The explosion of the information available on the Internet has made traditional information retrieval systems, characterized by one size fits all approaches, less effective. Indeed, users are overwhelmed by the information delivered by such systems in response to their queries, particularly when the latter are ambiguous. In order to tackle this problem, the state-of-the-art reveals that there is a growing interest towards contextual information retrieval (CIR) which relies on various sources of evidence issued from the user's search background and environment, in order to improve the retrieval accuracy. This chapter focuses on mobile context, highlights challenges they present for IR, and gives an overview of CIR approaches applied in this environment. Then, the authors present an approach to personalize search results for mobile users by exploiting both cognitive and spatio-temporal contexts. The experimental evaluation undertaken in front of Yahoo search shows that the approach improves the quality of top search result lists and enhances search result precision.
- Date
- 20. 4.2012 13:19:22
- Source
- Next generation search engines: advanced models for information retrieval. Eds.: C. Jouis, u.a
-
Chang, C.-H.; Hsu, C.-C.: Customizable multi-engine search tool with clustering (1997)
0.01
0.0064955507 = product of:
0.022734426 = sum of:
0.0055578267 = product of:
0.027789133 = sum of:
0.027789133 = weight(_text_:system in 2670) [ClassicSimilarity], result of:
0.027789133 = score(doc=2670,freq=2.0), product of:
0.11408355 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.03622214 = queryNorm
0.2435858 = fieldWeight in 2670, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.0546875 = fieldNorm(doc=2670)
0.2 = coord(1/5)
0.0171766 = product of:
0.0343532 = sum of:
0.0343532 = weight(_text_:22 in 2670) [ClassicSimilarity], result of:
0.0343532 = score(doc=2670,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.2708308 = fieldWeight in 2670, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=2670)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Abstract
- Proposes a new idea of searching under the multi-engine search architecture to overcome the problems associated with relevance ranking. These include clustering of the search results and extraction of co-occurence keywords, which, with the user's feedback, better refines the query in the searching process. The system also provides the construction of the concept space to gradually customize the search tool to fit the usage for the user at the same time
- Date
- 1. 8.1996 22:08:06
-
Kurzke, C.; Galle, M.; Bathelt, M.: WebAssistant : a user profile specific information retrieval assistant (1998)
0.01
0.0063723573 = product of:
0.02230325 = sum of:
0.0051266486 = product of:
0.025633242 = sum of:
0.025633242 = weight(_text_:retrieval in 3559) [ClassicSimilarity], result of:
0.025633242 = score(doc=3559,freq=2.0), product of:
0.109568894 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03622214 = queryNorm
0.23394634 = fieldWeight in 3559, 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=3559)
0.2 = coord(1/5)
0.0171766 = product of:
0.0343532 = sum of:
0.0343532 = weight(_text_:22 in 3559) [ClassicSimilarity], result of:
0.0343532 = score(doc=3559,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.2708308 = fieldWeight in 3559, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=3559)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Date
- 1. 8.1996 22:08:06
-
Jenkins, C.: Automatic classification of Web resources using Java and Dewey Decimal Classification (1998)
0.01
0.0063723573 = product of:
0.02230325 = sum of:
0.0051266486 = product of:
0.025633242 = sum of:
0.025633242 = weight(_text_:retrieval in 1673) [ClassicSimilarity], result of:
0.025633242 = score(doc=1673,freq=2.0), product of:
0.109568894 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03622214 = queryNorm
0.23394634 = fieldWeight in 1673, 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=1673)
0.2 = coord(1/5)
0.0171766 = product of:
0.0343532 = sum of:
0.0343532 = weight(_text_:22 in 1673) [ClassicSimilarity], result of:
0.0343532 = score(doc=1673,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.2708308 = fieldWeight in 1673, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=1673)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Date
- 1. 8.1996 22:08:06
- Theme
- Klassifikationssysteme im Online-Retrieval
-
Furner, J.: ¬A unifying model of document relatedness for hybrid search engines (2003)
0.01
0.0061314013 = product of:
0.021459904 = sum of:
0.0067371028 = product of:
0.033685513 = sum of:
0.033685513 = weight(_text_:system in 2717) [ClassicSimilarity], result of:
0.033685513 = score(doc=2717,freq=4.0), product of:
0.11408355 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.03622214 = queryNorm
0.29527056 = fieldWeight in 2717, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.046875 = fieldNorm(doc=2717)
0.2 = coord(1/5)
0.0147228 = product of:
0.0294456 = sum of:
0.0294456 = weight(_text_:22 in 2717) [ClassicSimilarity], result of:
0.0294456 = score(doc=2717,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.23214069 = fieldWeight in 2717, 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=2717)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Abstract
- Previous work an search-engine design has indicated that information-seekers may benefit from being given the opportunity to exploit multiple sources of evidence of document relatedness. Few existing systems, however, give users more than minimal control over the selections that may be made among methods of exploitation. By applying the methods of "document network analysis" (DNA), a unifying, graph-theoretic model of content-, collaboration-, and context-based systems (CCC) may be developed in which the nature of the similarities between types of document relatedness and document ranking are clarified. The usefulness of the approach to system design suggested by this model may be tested by constructing and evaluating a prototype system (UCXtra) that allows searchers to maintain control over the multiple ways in which document collections may be ranked and re-ranked.
- Date
- 11. 9.2004 17:32:22
-
Mukherjea, S.; Hirata, K.; Hara, Y.: Towards a multimedia World-Wide Web information retrieval engine (1997)
0.01
0.005982068 = product of:
0.020937236 = sum of:
0.006214436 = product of:
0.03107218 = sum of:
0.03107218 = weight(_text_:retrieval in 2678) [ClassicSimilarity], result of:
0.03107218 = score(doc=2678,freq=4.0), product of:
0.109568894 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03622214 = queryNorm
0.2835858 = fieldWeight in 2678, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=2678)
0.2 = coord(1/5)
0.0147228 = product of:
0.0294456 = sum of:
0.0294456 = weight(_text_:22 in 2678) [ClassicSimilarity], result of:
0.0294456 = score(doc=2678,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.23214069 = fieldWeight in 2678, 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=2678)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Abstract
- Describes a search engine that integrate text and image search. 1 or more Web site can be indexed for both textual and image information, allowing the user to search based on keywords or images or both. Another problem with the current search engines is that they show the results as pages of scrolled lists; this is not very user-friendly. The search engine allows the user to visualise to results in various ways. Explains the indexing and searching techniques of the search engine and highlights several features of the querying interface to make the retrieval process more efficient. Use examples to show the usefulness of the technology
- Date
- 1. 8.1996 22:08:06
-
Carrière, S.J.; Kazman, R.: Webquery : searching and visualising the Web through connectivity (1997)
0.01
0.005567615 = product of:
0.01948665 = sum of:
0.0047638514 = product of:
0.023819257 = sum of:
0.023819257 = weight(_text_:system in 2674) [ClassicSimilarity], result of:
0.023819257 = score(doc=2674,freq=2.0), product of:
0.11408355 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.03622214 = queryNorm
0.20878783 = fieldWeight in 2674, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.046875 = fieldNorm(doc=2674)
0.2 = coord(1/5)
0.0147228 = product of:
0.0294456 = sum of:
0.0294456 = weight(_text_:22 in 2674) [ClassicSimilarity], result of:
0.0294456 = score(doc=2674,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.23214069 = fieldWeight in 2674, 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=2674)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Abstract
- The WebQuery system offers a powerful new method for searching the Web based on connectivity and content. Examines links among the nodes returned in a keyword-based query. Rankes the nodes, giving the highest rank to the most highly connected nodes. By doing so, finds hot spots on the Web that contain information germane to a user's query. WebQuery not only ranks and filters the results of a Web query; it also extends the result set beyond what the search engine retrieves, by finding interesting sites that are highly connected to those sites returned by the original query. Even with WebQuery filering and ranking query results, the result set can be enormous. Explores techniques for visualizing the returned information and discusses the criteria for using each of the technique
- Date
- 1. 8.1996 22:08:06
-
Su, L.T.: ¬A comprehensive and systematic model of user evaluation of Web search engines : Il. An evaluation by undergraduates (2003)
0.01
0.005470008 = product of:
0.019145027 = sum of:
0.0068760267 = product of:
0.034380134 = sum of:
0.034380134 = weight(_text_:system in 2117) [ClassicSimilarity], result of:
0.034380134 = score(doc=2117,freq=6.0), product of:
0.11408355 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.03622214 = queryNorm
0.30135927 = fieldWeight in 2117, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.0390625 = fieldNorm(doc=2117)
0.2 = coord(1/5)
0.0122690005 = product of:
0.024538001 = sum of:
0.024538001 = weight(_text_:22 in 2117) [ClassicSimilarity], result of:
0.024538001 = score(doc=2117,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.19345059 = fieldWeight in 2117, 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=2117)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Abstract
- This paper presents an application of the model described in Part I to the evaluation of Web search engines by undergraduates. The study observed how 36 undergraduate used four major search engines to find information for their own individual problems and how they evaluated these engines based an actual interaction with the search engines. User evaluation was based an 16 performance measures representing five evaluation criteria: relevance, efficiency, utility, user satisfaction, and connectivity. Non-performance (user-related) measures were also applied. Each participant searched his/ her own topic an all four engines and provided satisfaction ratings for system features and interaction and reasons for satisfaction. Each also made relevance judgements of retrieved items in relation to his/her own information need and participated in post-search Interviews to provide reactions to the search results and overall performance. The study found significant differences in precision PR1 relative recall, user satisfaction with output display, time saving, value of search results, and overall performance among the four engines and also significant engine by discipline interactions an all these measures. In addition, the study found significant differences in user satisfaction with response time among four engines, and significant engine by discipline interaction in user satisfaction with search interface. None of the four search engines dominated in every aspect of the multidimensional evaluation. Content analysis of verbal data identified a number of user criteria and users evaluative comments based an these criteria. Results from both quantitative analysis and content analysis provide insight for system design and development, and useful feedback an strengths and weaknesses of search engines for system improvement
- Date
- 24. 1.2004 18:27:22
-
Fluhr, C.: Crosslingual access to photo databases (2012)
0.01
0.00546202 = product of:
0.01911707 = sum of:
0.00439427 = product of:
0.02197135 = sum of:
0.02197135 = weight(_text_:retrieval in 93) [ClassicSimilarity], result of:
0.02197135 = score(doc=93,freq=2.0), product of:
0.109568894 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03622214 = queryNorm
0.20052543 = fieldWeight in 93, 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=93)
0.2 = coord(1/5)
0.0147228 = product of:
0.0294456 = sum of:
0.0294456 = weight(_text_:22 in 93) [ClassicSimilarity], result of:
0.0294456 = score(doc=93,freq=2.0), product of:
0.12684377 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03622214 = queryNorm
0.23214069 = fieldWeight in 93, 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=93)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Date
- 17. 4.2012 14:25:22
- Source
- Next generation search engines: advanced models for information retrieval. Eds.: C. Jouis, u.a
