-
Li, L.; Shang, Y.; Zhang, W.: Improvement of HITS-based algorithms on Web documents
0.16
0.16279891 = product of:
0.32559782 = sum of:
0.062105697 = product of:
0.18631709 = sum of:
0.18631709 = weight(_text_:3a in 2514) [ClassicSimilarity], result of:
0.18631709 = score(doc=2514,freq=2.0), product of:
0.33151442 = queryWeight, product of:
8.478011 = idf(docFreq=24, maxDocs=44218)
0.039102852 = 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)
0.33333334 = coord(1/3)
0.26349214 = weight(_text_:2f in 2514) [ClassicSimilarity], result of:
0.26349214 = score(doc=2514,freq=4.0), product of:
0.33151442 = queryWeight, product of:
8.478011 = idf(docFreq=24, maxDocs=44218)
0.039102852 = 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)
0.5 = coord(2/4)
- 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/.
-
Tyner, R.: Sink or swim : Internet search tools & techniques (1996)
0.05
0.047134142 = product of:
0.18853657 = sum of:
0.18853657 = weight(_text_:logic in 5676) [ClassicSimilarity], result of:
0.18853657 = score(doc=5676,freq=2.0), product of:
0.2358082 = queryWeight, product of:
6.0304604 = idf(docFreq=288, maxDocs=44218)
0.039102852 = queryNorm
0.7995336 = fieldWeight in 5676, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.0304604 = idf(docFreq=288, maxDocs=44218)
0.09375 = fieldNorm(doc=5676)
0.25 = coord(1/4)
- Abstract
- Very good site that includes search basics, Boolean logic. Reviews all the popular search engines and includes Size, Currency, Search options, and Results
-
Lucas, W.T.; Topi, H.: Training for Web search : will it get you in shape? (2004)
0.04
0.040819366 = product of:
0.16327746 = sum of:
0.16327746 = weight(_text_:logic in 5245) [ClassicSimilarity], result of:
0.16327746 = score(doc=5245,freq=6.0), product of:
0.2358082 = queryWeight, product of:
6.0304604 = idf(docFreq=288, maxDocs=44218)
0.039102852 = queryNorm
0.6924164 = fieldWeight in 5245, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
6.0304604 = idf(docFreq=288, maxDocs=44218)
0.046875 = fieldNorm(doc=5245)
0.25 = coord(1/4)
- Abstract
- Given that time is money, Web searching can be a very expensive proposition. Even with the best search technology, the usefulness of search results depends on the searcher's ability to use that technology effectively. In an effort to improve this ability, our research investigates the effects of logic training, interface training, and the type of search interface on the search process. In a study with 145 participants, we found that even limited training in basic Boolean logic improved performance with a simple search interface. Surprisingly, for users of an interface that assisted them in forming syntactically correct Boolean queries, performance was negatively affected by logic training and unaffected by interface training. Use of the assisted interface itself, however, resulted in strong improvements in performance over use of the simple interface. In addition to being useful for search engine providers, these findings are important for all companies that rely heavily on search for critical aspects of their operations, in that they demonstrate simple means by which the search experience can be improved for their employees and customers.
-
Topi, H.; Lucas, W.: Searching the Web : operator assistance required (2005)
0.03
0.033328876 = product of:
0.1333155 = sum of:
0.1333155 = weight(_text_:logic in 1012) [ClassicSimilarity], result of:
0.1333155 = score(doc=1012,freq=4.0), product of:
0.2358082 = queryWeight, product of:
6.0304604 = idf(docFreq=288, maxDocs=44218)
0.039102852 = queryNorm
0.56535566 = fieldWeight in 1012, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
6.0304604 = idf(docFreq=288, maxDocs=44218)
0.046875 = fieldNorm(doc=1012)
0.25 = coord(1/4)
- Abstract
- This study examines the effects of the search interface and Boolean logic training on user search performance and satisfaction. We compared the use of an assisted search tool to that of a simple search interface like those typically found at commercial search engine sites. We found that the assisted search tool had a significant positive effect on performance, satisfaction, and confidence. Promoting the use of advanced search features is therefore in the best interest of both Web search providers and users. In the absence of an assisted interface, a simple interface coupled with Boolean logic training was also an effective means for improving user performance. Given that most searchers choose to use the simple search box, it is important to provide them with applicable training to promote the effective use of the search tool. Interestingly, coupling the assisted interface with Boolean training was no more effective than either treatment alone.
-
Mooney, G.; John, R.: Intelligent information retrieval from the World Wide Web using fuzzy user modelling (1997)
0.03
0.027494917 = product of:
0.10997967 = sum of:
0.10997967 = weight(_text_:logic in 1175) [ClassicSimilarity], result of:
0.10997967 = score(doc=1175,freq=2.0), product of:
0.2358082 = queryWeight, product of:
6.0304604 = idf(docFreq=288, maxDocs=44218)
0.039102852 = queryNorm
0.4663946 = fieldWeight in 1175, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.0304604 = idf(docFreq=288, maxDocs=44218)
0.0546875 = fieldNorm(doc=1175)
0.25 = coord(1/4)
- Abstract
- Investigates the application of fuzzy logic and user modelling to information retrieval (IR) from the WWW. To overcome existing problems IR systems must become 'intelligent'. User modelling is employed in the form of user stereotypes represented as adaptive fuzzy sets. This novel approach is applied to query formulation. The results of using this approach in a prototype system are reported. In the system a query is refined before it is submitted to an existing WWW search engine. Results from a user study show that the prototype system improves upon the performance of the search engine alone
-
Webber, S.: Search engines and news services : developments on the Internet (1998)
0.02
0.023567071 = product of:
0.094268285 = sum of:
0.094268285 = weight(_text_:logic in 5103) [ClassicSimilarity], result of:
0.094268285 = score(doc=5103,freq=2.0), product of:
0.2358082 = queryWeight, product of:
6.0304604 = idf(docFreq=288, maxDocs=44218)
0.039102852 = queryNorm
0.3997668 = fieldWeight in 5103, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.0304604 = idf(docFreq=288, maxDocs=44218)
0.046875 = fieldNorm(doc=5103)
0.25 = coord(1/4)
- Abstract
- Focuses on some issues relating to Internet search engines, (such as Alta Vista, HotBot and Yahoo!) and their use in news information Web sites on the Internet, some of the ways in which search engine providers are trying to improve searching performance and some of the choices facing information providers. Reviews ways in which search engine providers are responding to the challenge of improving searching, including: adding a selective, browsable database as an alternative; including only home pages (producing fewer hits) and browsability; adding company information; adjusting the weightings on their relevance rankings; building up searches; and allowing Boolean logic and field searching. Also examines the options facing providers of news information on the Internet, particularly primary sources such as newspapers, news agencies and television companies. Discusses issues such as: whether or not to charge; the types of hyperlinks to provide; whether or not to partner and become a portal; the desirability of electronic mail alert; and the acceptability of news aggregation
-
Poynder, R.: Web research engines? (1996)
0.02
0.023567071 = product of:
0.094268285 = sum of:
0.094268285 = weight(_text_:logic in 5698) [ClassicSimilarity], result of:
0.094268285 = score(doc=5698,freq=2.0), product of:
0.2358082 = queryWeight, product of:
6.0304604 = idf(docFreq=288, maxDocs=44218)
0.039102852 = queryNorm
0.3997668 = fieldWeight in 5698, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.0304604 = idf(docFreq=288, maxDocs=44218)
0.046875 = fieldNorm(doc=5698)
0.25 = coord(1/4)
- Abstract
- Describes the shortcomings of search engines for the WWW comparing their current capabilities to those of the first generation CD-ROM products. Some allow phrase searching and most are improving their Boolean searching. Few allow truncation, wild cards or nested logic. They are stateless, losing previous search criteria. Unlike the indexing and classification systems for today's CD-ROMs, those for Web pages are random, unstructured and of variable quality. Considers that at best Web search engines can only offer free text searching. Discusses whether automatic data classification systems such as Infoseek Ultra can overcome the haphazard nature of the Web with neural network technology, and whether Boolean search techniques may be redundant when replaced by technology such as the Euroferret search engine. However, artificial intelligence is rarely successful on huge, varied databases. Relevance ranking and automatic query expansion still use the same simple inverted indexes. Most Web search engines do nothing more than word counting. Further complications arise with foreign languages
-
Thelwall, M.: Assessing web search engines : a webometric approach (2011)
0.02
0.023567071 = product of:
0.094268285 = sum of:
0.094268285 = weight(_text_:logic in 10) [ClassicSimilarity], result of:
0.094268285 = score(doc=10,freq=2.0), product of:
0.2358082 = queryWeight, product of:
6.0304604 = idf(docFreq=288, maxDocs=44218)
0.039102852 = queryNorm
0.3997668 = fieldWeight in 10, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.0304604 = idf(docFreq=288, maxDocs=44218)
0.046875 = fieldNorm(doc=10)
0.25 = coord(1/4)
- Abstract
- Information Retrieval (IR) research typically evaluates search systems in terms of the standard precision, recall and F-measures to weight the relative importance of precision and recall (e.g. van Rijsbergen, 1979). All of these assess the extent to which the system returns good matches for a query. In contrast, webometric measures are designed specifically for web search engines and are designed to monitor changes in results over time and various aspects of the internal logic of the way in which search engine select the results to be returned. This chapter introduces a range of webometric measurements and illustrates them with case studies of Google, Bing and Yahoo! This is a very fertile area for simple and complex new investigations into search engine results.
-
Frau-Meigs, D.: Minding the gatekeepers : search engines for young people, and the regulatory riddle of harmful content - an environmental cognition perspective (2007)
0.02
0.015711382 = product of:
0.06284553 = sum of:
0.06284553 = weight(_text_:logic in 387) [ClassicSimilarity], result of:
0.06284553 = score(doc=387,freq=2.0), product of:
0.2358082 = queryWeight, product of:
6.0304604 = idf(docFreq=288, maxDocs=44218)
0.039102852 = queryNorm
0.2665112 = fieldWeight in 387, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.0304604 = idf(docFreq=288, maxDocs=44218)
0.03125 = fieldNorm(doc=387)
0.25 = coord(1/4)
- Abstract
- Search engines have evolved with the internet as an organic tool to make sense of the chaos of sites accessible on the web. They started in the early 19906 as the Internet was becoming a commercial entity. They have gradually been converging and a few of them have a quasi monopoly on access to information, with three major actors left: Google, Yahoo! and MSN. This increased control in access to sources of internet content has triggered concerns among consumers, activists, family associations and governments. Issues of consumer manipulation, harmful content and freedom of speech have appeared that stress the key role of search engines but also call into question their functionality and their independence. Their use and appropriation by young people and parents also question their functionality and independence. According to a recent research on media appropriation, go per cent of young people between iz and 14 years in six European countries connect to internet mostly via search engines, with Google by far the favourite. But it is not to look for information. It is rather as a lazy way to get to the site they want and already know. It is more a portal than an information provider. Most young people don't seem to be aware that there are dedicated search engines for their own use. As for parents, they tend to use filters mostly to control the time and the expenses of their children. In both cases, search relevance is a kind of shortcut rather than a thorough quest for information. It follows an economic logic of saving time and money rather than curiosity or control of harmful content. And yet search engines for children are the outcome of calls for regulation by families and educators. So how to explain the gap between user behaviour and media competence? Between regulation and appropriation? Where does this leave protection of minors about unsuitable or harmful content? What does it tell us about the future of search? This chapter has three objectives, developed in three parts: to take stock of the existing search tools for parents and young people; to provide an analytical framework for assessing self-, co- and regulatory strategies for search engines in the context of harmful content; to place search engines for children in the wider perspective of the search for information, in an environmental cognition paradigm. This leads to consider alternative solutions to direct regulation in internet governance and to examine new criteria for the empowerment of children in the information society.
-
Großjohann, K.: Gathering-, Harvesting-, Suchmaschinen (1996)
0.01
0.007492358 = product of:
0.029969431 = sum of:
0.029969431 = product of:
0.089908294 = sum of:
0.089908294 = weight(_text_:22 in 3227) [ClassicSimilarity], result of:
0.089908294 = score(doc=3227,freq=4.0), product of:
0.13693152 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.039102852 = queryNorm
0.6565931 = fieldWeight in 3227, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.09375 = fieldNorm(doc=3227)
0.33333334 = coord(1/3)
0.25 = coord(1/4)
- Date
- 7. 2.1996 22:38:41
- Pages
- 22 S
-
Höfer, W.: Detektive im Web (1999)
0.01
0.007492358 = product of:
0.029969431 = sum of:
0.029969431 = product of:
0.089908294 = sum of:
0.089908294 = weight(_text_:22 in 4007) [ClassicSimilarity], result of:
0.089908294 = score(doc=4007,freq=4.0), product of:
0.13693152 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.039102852 = queryNorm
0.6565931 = fieldWeight in 4007, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.09375 = fieldNorm(doc=4007)
0.33333334 = coord(1/3)
0.25 = coord(1/4)
- Date
- 22. 8.1999 20:22:06
-
Rensman, J.: Blick ins Getriebe (1999)
0.01
0.007492358 = product of:
0.029969431 = sum of:
0.029969431 = product of:
0.089908294 = sum of:
0.089908294 = weight(_text_:22 in 4009) [ClassicSimilarity], result of:
0.089908294 = score(doc=4009,freq=4.0), product of:
0.13693152 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.039102852 = queryNorm
0.6565931 = fieldWeight in 4009, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.09375 = fieldNorm(doc=4009)
0.33333334 = coord(1/3)
0.25 = coord(1/4)
- Date
- 22. 8.1999 21:22:59
-
Stock, M.; Stock, W.G.: Recherchieren im Internet (2004)
0.01
0.007063862 = product of:
0.028255448 = sum of:
0.028255448 = product of:
0.08476634 = sum of:
0.08476634 = weight(_text_:22 in 4686) [ClassicSimilarity], result of:
0.08476634 = score(doc=4686,freq=2.0), product of:
0.13693152 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.039102852 = queryNorm
0.61904186 = fieldWeight in 4686, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.125 = fieldNorm(doc=4686)
0.33333334 = coord(1/3)
0.25 = coord(1/4)
- Date
- 27.11.2005 18:04:22
-
MacLeod, R.: Promoting a subject gateway : a case study from EEVL (Edinburgh Engineering Virtual Library) (2000)
0.01
0.006243631 = product of:
0.024974523 = sum of:
0.024974523 = product of:
0.07492357 = sum of:
0.07492357 = weight(_text_:22 in 4872) [ClassicSimilarity], result of:
0.07492357 = score(doc=4872,freq=4.0), product of:
0.13693152 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.039102852 = queryNorm
0.54716086 = fieldWeight in 4872, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=4872)
0.33333334 = coord(1/3)
0.25 = coord(1/4)
- Date
- 22. 6.2002 19:40:22
-
Vidmar, D.J.: Darwin on the Web : the evolution of search tools (1999)
0.01
0.0061808797 = product of:
0.024723519 = sum of:
0.024723519 = product of:
0.07417055 = sum of:
0.07417055 = weight(_text_:22 in 3175) [ClassicSimilarity], result of:
0.07417055 = score(doc=3175,freq=2.0), product of:
0.13693152 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.039102852 = queryNorm
0.5416616 = fieldWeight in 3175, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=3175)
0.33333334 = coord(1/3)
0.25 = coord(1/4)
- Source
- Computers in libraries. 19(1999) no.5, S.22-28
-
Back, J.: ¬An evaluation of relevancy ranking techniques used by Internet search engines (2000)
0.01
0.0061808797 = product of:
0.024723519 = sum of:
0.024723519 = product of:
0.07417055 = sum of:
0.07417055 = weight(_text_:22 in 3445) [ClassicSimilarity], result of:
0.07417055 = score(doc=3445,freq=2.0), product of:
0.13693152 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.039102852 = queryNorm
0.5416616 = fieldWeight in 3445, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=3445)
0.33333334 = coord(1/3)
0.25 = coord(1/4)
- Date
- 25. 8.2005 17:42:22
-
ap: Suchmaschinen in neuem Gewand : Metaspinner kennt 600 Millionen Seiten (1999)
0.01
0.0061808797 = product of:
0.024723519 = sum of:
0.024723519 = product of:
0.07417055 = sum of:
0.07417055 = weight(_text_:22 in 4224) [ClassicSimilarity], result of:
0.07417055 = score(doc=4224,freq=2.0), product of:
0.13693152 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.039102852 = queryNorm
0.5416616 = fieldWeight in 4224, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=4224)
0.33333334 = coord(1/3)
0.25 = coord(1/4)
- Date
- 3. 5.1997 8:44:22
-
Dunning, A.: Do we still need search engines? (1999)
0.01
0.0061808797 = product of:
0.024723519 = sum of:
0.024723519 = product of:
0.07417055 = sum of:
0.07417055 = weight(_text_:22 in 6021) [ClassicSimilarity], result of:
0.07417055 = score(doc=6021,freq=2.0), product of:
0.13693152 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.039102852 = queryNorm
0.5416616 = fieldWeight in 6021, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=6021)
0.33333334 = coord(1/3)
0.25 = coord(1/4)
- Source
- Ariadne. 1999, no.22
-
Bawden, D.: Google and the universe of knowledge (2008)
0.01
0.0061808797 = product of:
0.024723519 = sum of:
0.024723519 = product of:
0.07417055 = sum of:
0.07417055 = weight(_text_:22 in 844) [ClassicSimilarity], result of:
0.07417055 = score(doc=844,freq=2.0), product of:
0.13693152 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.039102852 = queryNorm
0.5416616 = fieldWeight in 844, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=844)
0.33333334 = coord(1/3)
0.25 = coord(1/4)
- Date
- 7. 6.2008 16:22:20
-
Auf der Suche nach Suchmaschinen (1996)
0.01
0.0052978965 = product of:
0.021191586 = sum of:
0.021191586 = product of:
0.06357475 = sum of:
0.06357475 = weight(_text_:22 in 5583) [ClassicSimilarity], result of:
0.06357475 = score(doc=5583,freq=2.0), product of:
0.13693152 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.039102852 = queryNorm
0.46428138 = fieldWeight in 5583, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.09375 = fieldNorm(doc=5583)
0.33333334 = coord(1/3)
0.25 = coord(1/4)
- Source
- Cogito. 12(1996) H.5, S.19-22
