-
Poynder, R.: Web research engines? (1996)
0.12
0.12309804 = product of:
0.18464705 = sum of:
0.0986154 = weight(_text_:search in 5698) [ClassicSimilarity], result of:
0.0986154 = score(doc=5698,freq=12.0), product of:
0.1747324 = queryWeight, product of:
3.475677 = idf(docFreq=3718, maxDocs=44218)
0.05027291 = queryNorm
0.5643796 = fieldWeight in 5698, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
3.475677 = idf(docFreq=3718, maxDocs=44218)
0.046875 = fieldNorm(doc=5698)
0.08603165 = product of:
0.1720633 = sum of:
0.1720633 = weight(_text_:engines in 5698) [ClassicSimilarity], result of:
0.1720633 = score(doc=5698,freq=8.0), product of:
0.25542772 = queryWeight, product of:
5.080822 = idf(docFreq=746, maxDocs=44218)
0.05027291 = queryNorm
0.67362815 = fieldWeight in 5698, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
5.080822 = idf(docFreq=746, maxDocs=44218)
0.046875 = fieldNorm(doc=5698)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- 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
-
Van der Walt, M.: ¬The structure of classification schemes used in Internet search engines (1998)
0.11
0.108549975 = product of:
0.16282496 = sum of:
0.07501928 = weight(_text_:search in 84) [ClassicSimilarity], result of:
0.07501928 = score(doc=84,freq=10.0), product of:
0.1747324 = queryWeight, product of:
3.475677 = idf(docFreq=3718, maxDocs=44218)
0.05027291 = queryNorm
0.4293381 = fieldWeight in 84, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
3.475677 = idf(docFreq=3718, maxDocs=44218)
0.0390625 = fieldNorm(doc=84)
0.08780568 = product of:
0.17561136 = sum of:
0.17561136 = weight(_text_:engines in 84) [ClassicSimilarity], result of:
0.17561136 = score(doc=84,freq=12.0), product of:
0.25542772 = queryWeight, product of:
5.080822 = idf(docFreq=746, maxDocs=44218)
0.05027291 = queryNorm
0.68751884 = fieldWeight in 84, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
5.080822 = idf(docFreq=746, maxDocs=44218)
0.0390625 = fieldNorm(doc=84)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- The purpose of this paper is to determine some of the structural features of the classification schemes used in the directories (guides, channels) of search engines to organise information sources on the Internet. Ten search engines were examined at the main class level and the full hierarchies of a sample of three specific subjects were analysed in four of these engines, namely Excite, Infoseek, Lycos and Yahoo! It was found that there are major differences between the main classes of the search engines and those found in standard library schemes like Dewey, UDC and LCC. There are large gaps in subject coverage at main class level in the search engines and the general tendency is to use a topic-based approach in the formation of classes, rather than a discipline-based approach. The subdivision of the main classes is according to hierarchical tree structures, but a number of anomalies in this regard were identified. Another deviation from library classification theory is that various principles of division are employed to form classes at the same hierarchical level. In an analysis of citation orders many examples were found that conform to the principles followed in library classifications, but a number of inconsistencies in this regard were also noted
-
Dodd, D.G.: Grass-roots cataloging and classification : food for thought from World Wide Web subject-oriented hierarchical lists (1996)
0.08
0.07774002 = product of:
0.11661003 = sum of:
0.0664249 = weight(_text_:search in 7270) [ClassicSimilarity], result of:
0.0664249 = score(doc=7270,freq=4.0), product of:
0.1747324 = queryWeight, product of:
3.475677 = idf(docFreq=3718, maxDocs=44218)
0.05027291 = queryNorm
0.38015217 = fieldWeight in 7270, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.475677 = idf(docFreq=3718, maxDocs=44218)
0.0546875 = fieldNorm(doc=7270)
0.05018513 = product of:
0.10037026 = sum of:
0.10037026 = weight(_text_:engines in 7270) [ClassicSimilarity], result of:
0.10037026 = score(doc=7270,freq=2.0), product of:
0.25542772 = queryWeight, product of:
5.080822 = idf(docFreq=746, maxDocs=44218)
0.05027291 = queryNorm
0.39294976 = fieldWeight in 7270, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.080822 = idf(docFreq=746, maxDocs=44218)
0.0546875 = fieldNorm(doc=7270)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- The explosion of the use of the Internet by the genral public, particularly via the WWW, has given rise to the proliferation of semiprofessional attempts to give some subject based access to Internet resources via hierarchical guides (hotlists) on Web search engines such as Yahoo and Magellan. Examines the structure and principles of various hierachical lists, and compares them, when possible, to broad LCC and DDC schemes, and to LCSH. Explores the approaches taken by non librarians in their efforts to organize and provide access to materials on the Internet. Focuses on the dichotomy between the hierarchical 'browse' and the analytical 'search' approaches to finding materials, as exemplified by these various attempts to organize the Internet
-
Jenkins, C.: Automatic classification of Web resources using Java and Dewey Decimal Classification (1998)
0.05
0.047206 = product of:
0.070809 = sum of:
0.0469695 = weight(_text_:search in 1673) [ClassicSimilarity], result of:
0.0469695 = score(doc=1673,freq=2.0), product of:
0.1747324 = queryWeight, product of:
3.475677 = idf(docFreq=3718, maxDocs=44218)
0.05027291 = queryNorm
0.2688082 = fieldWeight in 1673, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.475677 = idf(docFreq=3718, maxDocs=44218)
0.0546875 = fieldNorm(doc=1673)
0.0238395 = product of:
0.047679 = sum of:
0.047679 = weight(_text_:22 in 1673) [ClassicSimilarity], result of:
0.047679 = score(doc=1673,freq=2.0), product of:
0.17604718 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05027291 = 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)
0.6666667 = coord(2/3)
- Abstract
- The Wolverhampton Web Library (WWLib) is a WWW search engine that provides access to UK based information. The experimental version developed in 1995, was a success but highlighted the need for a much higher degree of automation. An interesting feature of the experimental WWLib was that it organised information according to DDC. Discusses the advantages of classification and describes the automatic classifier that is being developed in Java as part of the new, fully automated WWLib
- Date
- 1. 8.1996 22:08:06
-
Ardo, A.; Lundberg, S.: ¬A regional distributed WWW search and indexing service : the DESIRE way (1998)
0.04
0.040462285 = product of:
0.060693428 = sum of:
0.04025957 = weight(_text_:search in 4190) [ClassicSimilarity], result of:
0.04025957 = score(doc=4190,freq=2.0), product of:
0.1747324 = queryWeight, product of:
3.475677 = idf(docFreq=3718, maxDocs=44218)
0.05027291 = queryNorm
0.230407 = fieldWeight in 4190, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.475677 = idf(docFreq=3718, maxDocs=44218)
0.046875 = fieldNorm(doc=4190)
0.020433856 = product of:
0.040867712 = sum of:
0.040867712 = weight(_text_:22 in 4190) [ClassicSimilarity], result of:
0.040867712 = score(doc=4190,freq=2.0), product of:
0.17604718 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05027291 = 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)
0.6666667 = coord(2/3)
- Date
- 1. 8.1996 22:08:06
-
Lee, H.-L.; Olson, H.A.: Hierarchical navigation : an exploration of Yahoo! directories (2005)
0.03
0.026839714 = product of:
0.08051914 = sum of:
0.08051914 = weight(_text_:search in 3991) [ClassicSimilarity], result of:
0.08051914 = score(doc=3991,freq=8.0), product of:
0.1747324 = queryWeight, product of:
3.475677 = idf(docFreq=3718, maxDocs=44218)
0.05027291 = queryNorm
0.460814 = fieldWeight in 3991, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.475677 = idf(docFreq=3718, maxDocs=44218)
0.046875 = fieldNorm(doc=3991)
0.33333334 = coord(1/3)
- Abstract
- Although researchers have theorized the critical importance of classification in the organization of information, the classification approach seems to have given way to the alphabetical subject approach in retrieval tools widely used in libraries, and research an how users utilize classification or classification-like arrangements in information seeking has been scant. To better understand whether searchers consider classificatory structures a viable alternative to information retrieval, this article reports an a study of how 24 library and information science students used Yahoo! directories, a popular search service resembling classification, in completing an assigned simple task. Several issues emerged from the students' reporting of their search process and a comparison between hierarchical navigation and keyword searching: citation order of facets, precision vs. recall, and other factors influencing searchers' successes and preferences. The latter included search expertise, knowledge of the discipline, and time required to complete the search. Without a definitive conclusion, we suggest a number of directoons for further research.
-
Peereboom, M.: DutchESS : Dutch Electronic Subject Service - a Dutch national collaborative effort (2000)
0.01
0.009081715 = product of:
0.027245143 = sum of:
0.027245143 = product of:
0.054490287 = sum of:
0.054490287 = weight(_text_:22 in 4869) [ClassicSimilarity], result of:
0.054490287 = score(doc=4869,freq=2.0), product of:
0.17604718 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05027291 = 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)
0.33333334 = coord(1/3)
- Date
- 22. 6.2002 19:39:23
-
Place, E.: Internationale Zusammenarbeit bei Internet Subject Gateways (1999)
0.01
0.0068112854 = product of:
0.020433856 = sum of:
0.020433856 = product of:
0.040867712 = sum of:
0.040867712 = weight(_text_:22 in 4189) [ClassicSimilarity], result of:
0.040867712 = score(doc=4189,freq=2.0), product of:
0.17604718 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05027291 = queryNorm
0.23214069 = fieldWeight in 4189, 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=4189)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 22. 6.2002 19:35:09
-
Place, E.: International collaboration on Internet subject gateways (2000)
0.01
0.0056760716 = product of:
0.017028214 = sum of:
0.017028214 = product of:
0.03405643 = sum of:
0.03405643 = weight(_text_:22 in 4584) [ClassicSimilarity], result of:
0.03405643 = score(doc=4584,freq=2.0), product of:
0.17604718 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05027291 = queryNorm
0.19345059 = fieldWeight in 4584, 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=4584)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 22. 6.2002 19:35:35
