-
Bronstein, J.; Gazit, T.; Perez, O.; Bar-Ilan, J.; Aharony, N.; Amichai-Hamburger, Y.: ¬An examination of the factors contributing to participation in online social platforms (2016)
0.03
0.026426375 = product of:
0.05285275 = sum of:
0.05285275 = sum of:
0.022671666 = weight(_text_:6 in 3364) [ClassicSimilarity], result of:
0.022671666 = score(doc=3364,freq=2.0), product of:
0.13521942 = queryWeight, product of:
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.044552263 = queryNorm
0.16766575 = fieldWeight in 3364, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.0390625 = fieldNorm(doc=3364)
0.030181082 = weight(_text_:22 in 3364) [ClassicSimilarity], result of:
0.030181082 = score(doc=3364,freq=2.0), product of:
0.15601443 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044552263 = queryNorm
0.19345059 = fieldWeight in 3364, 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=3364)
0.5 = coord(1/2)
- Date
- 20. 1.2015 18:30:22
- Source
- Aslib journal of information management. 68(2016) no.6, S.793-818
-
Lazinger, S.S.; Bar-Ilan, J.; Peritz, B.C.: Internet use by faculty members in various disciplines : a comparative case study (1997)
0.01
0.007935083 = product of:
0.015870165 = sum of:
0.015870165 = product of:
0.03174033 = sum of:
0.03174033 = weight(_text_:6 in 390) [ClassicSimilarity], result of:
0.03174033 = score(doc=390,freq=2.0), product of:
0.13521942 = queryWeight, product of:
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.044552263 = queryNorm
0.23473203 = fieldWeight in 390, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.0546875 = fieldNorm(doc=390)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Journal of the American Society for Information Science. 48(1997) no.6, S.508-518
-
Bar-Ilan, J.: Evaluating the stability of the search tools Hotbot and Snap : a case study (2000)
0.01
0.007935083 = product of:
0.015870165 = sum of:
0.015870165 = product of:
0.03174033 = sum of:
0.03174033 = weight(_text_:6 in 1180) [ClassicSimilarity], result of:
0.03174033 = score(doc=1180,freq=2.0), product of:
0.13521942 = queryWeight, product of:
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.044552263 = queryNorm
0.23473203 = fieldWeight in 1180, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.0546875 = fieldNorm(doc=1180)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Online information review. 24(2000) no.6, S.439-449
-
Bar-Ilan, J.: On the overlap, the precision and estimated recall of search engines : a case study of the query 'Erdös' (1998)
0.01
0.007935083 = product of:
0.015870165 = sum of:
0.015870165 = product of:
0.03174033 = sum of:
0.03174033 = weight(_text_:6 in 3753) [ClassicSimilarity], result of:
0.03174033 = score(doc=3753,freq=2.0), product of:
0.13521942 = queryWeight, product of:
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.044552263 = queryNorm
0.23473203 = fieldWeight in 3753, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.0546875 = fieldNorm(doc=3753)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Investigates the retrieval capabilities of 6 Internet search engines on a simple query. Existing work on search engine evaluation considers only the first 10 or 20 results returned by the search engine. In this work, all documents that the search engine pointed at were retrieved and thoroughly examined. Thus the precision of the whole retrieval process could be calculated, the overlap between the results of the engines studied, and an estimate on the recall of the searches given. The precision of the engines is high, recall is very low and the overlap is minimal
-
Bar-Ilan, J.: ¬The Web as an information source on informetrics? : A content analysis (2000)
0.01
0.0068014995 = product of:
0.013602999 = sum of:
0.013602999 = product of:
0.027205998 = sum of:
0.027205998 = weight(_text_:6 in 4587) [ClassicSimilarity], result of:
0.027205998 = score(doc=4587,freq=2.0), product of:
0.13521942 = queryWeight, product of:
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.044552263 = queryNorm
0.20119889 = fieldWeight in 4587, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.046875 = fieldNorm(doc=4587)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 6. 4.2000 18:08:41
-
Bar-Ilan, J.; Azoulay, R.: Map of nonprofit organization websites in Israel (2012)
0.01
0.0068014995 = product of:
0.013602999 = sum of:
0.013602999 = product of:
0.027205998 = sum of:
0.027205998 = weight(_text_:6 in 253) [ClassicSimilarity], result of:
0.027205998 = score(doc=253,freq=2.0), product of:
0.13521942 = queryWeight, product of:
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.044552263 = queryNorm
0.20119889 = fieldWeight in 253, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.046875 = fieldNorm(doc=253)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Journal of the American Society for Information Science and Technology. 63(2012) no.6, S.1142-1167
-
Zhitomirsky-Geffet, M.; Bar-Ilan, J.: Towards maximal unification of semantically diverse ontologies for controversial domains (2014)
0.01
0.0060362164 = product of:
0.012072433 = sum of:
0.012072433 = product of:
0.024144866 = sum of:
0.024144866 = weight(_text_:22 in 1634) [ClassicSimilarity], result of:
0.024144866 = score(doc=1634,freq=2.0), product of:
0.15601443 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044552263 = queryNorm
0.15476047 = fieldWeight in 1634, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03125 = fieldNorm(doc=1634)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 20. 1.2015 18:30:22
-
Zhitomirsky-Geffet, M.; Bar-Ilan, J.; Levene, M.: Testing the stability of "wisdom of crowds" judgments of search results over time and their similarity with the search engine rankings (2016)
0.01
0.0060362164 = product of:
0.012072433 = sum of:
0.012072433 = product of:
0.024144866 = sum of:
0.024144866 = weight(_text_:22 in 3071) [ClassicSimilarity], result of:
0.024144866 = score(doc=3071,freq=2.0), product of:
0.15601443 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044552263 = queryNorm
0.15476047 = fieldWeight in 3071, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03125 = fieldNorm(doc=3071)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 20. 1.2015 18:30:22
-
Bar-Ilan, J.; Belous, Y.: Children as architects of Web directories : an exploratory study (2007)
0.01
0.0056679165 = product of:
0.011335833 = sum of:
0.011335833 = product of:
0.022671666 = sum of:
0.022671666 = weight(_text_:6 in 289) [ClassicSimilarity], result of:
0.022671666 = score(doc=289,freq=2.0), product of:
0.13521942 = queryWeight, product of:
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.044552263 = queryNorm
0.16766575 = fieldWeight in 289, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.0390625 = fieldNorm(doc=289)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Journal of the American Society for Information Science and Technology. 58(2007) no.6, S.895-907
-
Bar-Ilan, J.: Comparing rankings of search results on the Web (2005)
0.01
0.0056679165 = product of:
0.011335833 = sum of:
0.011335833 = product of:
0.022671666 = sum of:
0.022671666 = weight(_text_:6 in 1068) [ClassicSimilarity], result of:
0.022671666 = score(doc=1068,freq=2.0), product of:
0.13521942 = queryWeight, product of:
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.044552263 = queryNorm
0.16766575 = fieldWeight in 1068, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.0390625 = fieldNorm(doc=1068)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Information processing and management. 41(2005) no.6, S.1511-1519
-
Shema, H.; Bar-Ilan, J.; Thelwall, M.: How is research blogged? : A content analysis approach (2015)
0.01
0.0056679165 = product of:
0.011335833 = sum of:
0.011335833 = product of:
0.022671666 = sum of:
0.022671666 = weight(_text_:6 in 1863) [ClassicSimilarity], result of:
0.022671666 = score(doc=1863,freq=2.0), product of:
0.13521942 = queryWeight, product of:
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.044552263 = queryNorm
0.16766575 = fieldWeight in 1863, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.0390625 = fieldNorm(doc=1863)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Journal of the Association for Information Science and Technology. 66(2015) no.6, S.1136-1149
-
Bar-Ilan, J.; Levene, M.; Mat-Hassan, M.: Methods for evaluating dynamic changes in search engine rankings : a case study (2006)
0.00
0.004534333 = product of:
0.009068666 = sum of:
0.009068666 = product of:
0.018137332 = sum of:
0.018137332 = weight(_text_:6 in 616) [ClassicSimilarity], result of:
0.018137332 = score(doc=616,freq=2.0), product of:
0.13521942 = queryWeight, product of:
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.044552263 = queryNorm
0.1341326 = fieldWeight in 616, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0350742 = idf(docFreq=5777, maxDocs=44218)
0.03125 = fieldNorm(doc=616)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Journal of documentation. 62(2006) no.6, S.708-729
