Change search
Link to record
Permanent link

Direct link
BETA
Ahlgren, Per
Publications (10 of 12) Show all publications
Ahlgren, P. & Jarneving, B. (2008). Bibliographic coupling, common abstract stems and clustering: a comparison of two document-document similarity approaches in the context of science mapping. Scientometrics, 76(2), 273-290
Open this publication in new window or tab >>Bibliographic coupling, common abstract stems and clustering: a comparison of two document-document similarity approaches in the context of science mapping
2008 (English)In: Scientometrics, ISSN 0138-9130, E-ISSN 1588-2861, Vol. 76, no 2, p. 273-290Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Akademiai Kiado Rt., 2008
National Category
Information Studies
Identifiers
urn:nbn:se:hb:diva-2437 (URN)10.1007/s11192-007-1935-1 (DOI)2320/4028 (Local ID)2320/4028 (Archive number)2320/4028 (OAI)
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2018-09-11Bibliographically approved
Ahlgren, P. & Grönqvist, L. (2008). Evaluation of retrieval effectiveness with incomplete relevance data: theoretical and experimental comparison of three measures. Information Processing & Management, 44(1), 212-225
Open this publication in new window or tab >>Evaluation of retrieval effectiveness with incomplete relevance data: theoretical and experimental comparison of three measures
2008 (English)In: Information Processing & Management, ISSN 0306-4573, E-ISSN 1873-5371, Vol. 44, no 1, p. 212-225Article in journal (Refereed)
Abstract [en]

This paper investigates two relatively new measures of retrieval effectiveness in relation to the problem of incomplete relevance data. The measures, Bpref and RankEff, which do not take into account documents that have not been relevance judged, are compared theoretically and experimentally. The experimental comparisons involve a third measure, the well-known mean uninterpolated average precision. The results indicate that RankEff is the most stable of the three measures when the amount of relevance data is reduced, with respect to system ranking and absolute values. In addition, RankEff has the lowest error-rate.

Place, publisher, year, edition, pages
Elsevier Ltd, 2008
National Category
Information Studies
Identifiers
urn:nbn:se:hb:diva-2387 (URN)10.1016/j.ipm.2007.01.011 (DOI)2320/3314 (Local ID)2320/3314 (Archive number)2320/3314 (OAI)
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2017-12-01
Ahlgren, P. & Kekäläinen, J. (2007). Indexing strategies for Swedish full text retrieval under different user scenarios. Information Processing & Management, 43(1), 81-102
Open this publication in new window or tab >>Indexing strategies for Swedish full text retrieval under different user scenarios
2007 (English)In: Information Processing & Management, ISSN 0306-4573, E-ISSN 1873-5371, Vol. 43, no 1, p. 81-102Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Elsevier Ltd, 2007
National Category
Information Studies
Identifiers
urn:nbn:se:hb:diva-2146 (URN)10.1016/j.ipm.2006.03.003 (DOI)2320/2179 (Local ID)2320/2179 (Archive number)2320/2179 (OAI)
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2017-11-05Bibliographically approved
Ahlgren, P. & Grönqvist, L. (2006). Measuring retrieval effectiveness with incomplete relevance data. In: Vicente P Guerrero-Bote (Ed.), Current Research in Information Sciences and Technologies. Multidisciplinary approaches to global information systems: (pp. 74). Open Institute of Knowledge
Open this publication in new window or tab >>Measuring retrieval effectiveness with incomplete relevance data
2006 (English)In: Current Research in Information Sciences and Technologies. Multidisciplinary approaches to global information systems / [ed] Vicente P Guerrero-Bote, Open Institute of Knowledge , 2006, p. 74-Chapter in book (Other academic)
Place, publisher, year, edition, pages
Open Institute of Knowledge, 2006
National Category
Information Studies
Identifiers
urn:nbn:se:hb:diva-4672 (URN)2320/2038 (Local ID)84-611-3104-5 (ISBN)2320/2038 (Archive number)2320/2038 (OAI)
Available from: 2015-12-17 Created: 2015-12-17 Last updated: 2017-11-02Bibliographically approved
Ahlgren, P. & Grönqvist, L. (2006). Retrieval evaluation with incomplete relevance data: a comparative study of three measures. In: : . Paper presented at the 15th ACM International Conference on Information and Knowledge Management, Arlington, November 05-11, 2006.
Open this publication in new window or tab >>Retrieval evaluation with incomplete relevance data: a comparative study of three measures
2006 (English)Conference paper, Published paper (Refereed)
National Category
Information Studies
Identifiers
urn:nbn:se:hb:diva-5646 (URN)2320/2039 (Local ID)1-59593-433-2 (ISBN)2320/2039 (Archive number)2320/2039 (OAI)
Conference
the 15th ACM International Conference on Information and Knowledge Management, Arlington, November 05-11, 2006
Note

Sponsorship:

ACM SIGIR and ACM SIGMIS

Available from: 2015-12-22 Created: 2015-12-22 Last updated: 2017-01-30Bibliographically approved
Ahlgren, P. & Kekäläinen, J. (2006). Swedish full text retrieval: effectiveness of different combinations of indexing strategies with query terms. Information retrieval (Boston), 9(6), 681
Open this publication in new window or tab >>Swedish full text retrieval: effectiveness of different combinations of indexing strategies with query terms
2006 (English)In: Information retrieval (Boston), ISSN 1386-4564, E-ISSN 1573-7659, Vol. 9, no 6, p. 681-Article in journal (Refereed) Published
Keywords
library and information science, biblioteks- och informationsvetenskap
National Category
Information Studies
Identifiers
urn:nbn:se:hb:diva-2093 (URN)2320/1900 (Local ID)2320/1900 (Archive number)2320/1900 (OAI)
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2017-11-05Bibliographically approved
Ahlgren, P., Jarneving, B. & Rousseau, R. (2004). Letter to the editor. Author Cocitation Analysis and Pearson's r. Journal of The American Society For Information Science And Technology, 9(55), 843-844
Open this publication in new window or tab >>Letter to the editor. Author Cocitation Analysis and Pearson's r
2004 (English)In: Journal of The American Society For Information Science And Technology, ISSN 1532-2882, E-ISSN 1532-2890, Vol. 9, no 55, p. 843-844Article in journal (Other academic) Published
Place, publisher, year, edition, pages
New York : Wiley, 2004
National Category
Information Studies
Identifiers
urn:nbn:se:hb:diva-2201 (URN)2320/2583 (Local ID)2320/2583 (Archive number)2320/2583 (OAI)
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2017-12-01Bibliographically approved
Ahlgren, P., Jarneving, B. & Rousseau, R. (2004). Letter to the editor. Rejoinder: In Defense of Formal Methods. Journal of The American Society For Information Science And Technology, 10(55), 935-936
Open this publication in new window or tab >>Letter to the editor. Rejoinder: In Defense of Formal Methods
2004 (English)In: Journal of The American Society For Information Science And Technology, ISSN 1532-2882, E-ISSN 1532-2890, Vol. 10, no 55, p. 935-936Article in journal (Other academic) Published
Place, publisher, year, edition, pages
New York : Wiley, 2004
National Category
Information Studies
Identifiers
urn:nbn:se:hb:diva-2200 (URN)2320/2582 (Local ID)2320/2582 (Archive number)2320/2582 (OAI)
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2017-12-01Bibliographically approved
Ahlgren, P. (2004). The effects of indexing strategy-query term combination on retrieval effectiveness in a Swedish full text database. (Doctoral dissertation). Borås : Valfrid
Open this publication in new window or tab >>The effects of indexing strategy-query term combination on retrieval effectiveness in a Swedish full text database
2004 (English)Doctoral thesis, monograph (Other academic)
Place, publisher, year, edition, pages
Borås : Valfrid, 2004
Series
Skrifter från Valfrid, ISSN 1103-6990 ; 28
Keywords
informationsåtervinning, metodik, fulltextdatabaser, information retrieval, methodology, fulltext databases
National Category
Information Studies
Identifiers
urn:nbn:se:hb:diva-3428 (URN)2320/2581 (Local ID)91-89416-10-4 (ISBN)2320/2581 (Archive number)2320/2581 (OAI)
Available from: 2015-12-04 Created: 2015-12-04
Ahlgren, P., Jarneving, B. & Rousseau, R. (2003). Requirements for a cocitation similarity measure, with special reference to Pearson's correlation coefficient. Journal of The American Society For Information Science And Technology, 54(6), 550-560
Open this publication in new window or tab >>Requirements for a cocitation similarity measure, with special reference to Pearson's correlation coefficient
2003 (English)In: Journal of The American Society For Information Science And Technology, ISSN 1532-2882, E-ISSN 1532-2890, Vol. 54, no 6, p. 550-560Article in journal (Other academic) Published
Abstract [en]

Ahlgren, Jarneving, and. Rousseau review accepted procedures for author co-citation analysis first pointing out that since in the raw data matrix the row and column values are identical i,e, the co-citation count of two authors, there is no clear choice for diagonal values. They suggest the number of times an author has been co-cited with himself excluding self citation rather than the common treatment as zeros or as missing values. When the matrix is converted to a similarity matrix the normal procedure is to create a matrix of Pearson's r coefficients between data vectors. Ranking by r and by co-citation frequency and by intuition can easily yield three different orders. It would seem necessary that the adding of zeros to the matrix will not affect the value or the relative order of similarity measures but it is shown that this is not the case with Pearson's r. Using 913 bibliographic descriptions form the Web of Science of articles form JASIS and Scientometrics, authors names were extracted, edited and 12 information retrieval authors and 12 bibliometric authors each from the top 100 most cited were selected. Co-citation and r value (diagonal elements treated as missing) matrices were constructed, and then reconstructed in expanded form. Adding zeros can both change the r value and the ordering of the authors based upon that value. A chi-squared distance measure would not violate these requirements, nor would the cosine coefficient. It is also argued that co-citation data is ordinal data since there is no assurance of an absolute zero number of co-citations, and thus Pearson is not appropriate. The number of ties in co-citation data make the use of the Spearman rank order coefficient problematic.

Place, publisher, year, edition, pages
New York : Wiley, 2003
National Category
Information Studies
Identifiers
urn:nbn:se:hb:diva-2242 (URN)10.1002/asi.10242 (DOI)2320/2707 (Local ID)2320/2707 (Archive number)2320/2707 (OAI)
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2017-12-01Bibliographically approved
Organisations

Search in DiVA

Show all publications