-
Ku, L.-W.; Ho, H.-W.; Chen, H.-H.: Opinion mining and relationship discovery using CopeOpi opinion analysis system (2009)
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- Abstract
- We present CopeOpi, an opinion-analysis system, which extracts from the Web opinions about specific targets, summarizes the polarity and strength of these opinions, and tracks opinion variations over time. Objects that yield similar opinion tendencies over a certain time period may be correlated due to the latent causal events. CopeOpi discovers relationships among objects based on their opinion-tracking plots and collocations. Event bursts are detected from the tracking plots, and the strength of opinion relationships is determined by the coverage of these plots. To evaluate opinion mining, we use the NTCIR corpus annotated with opinion information at sentence and document levels. CopeOpi achieves sentence- and document-level f-measures of 62% and 74%. For relationship discovery, we collected 1.3M economics-related documents from 93 Web sources over 22 months, and analyzed collocation-based, opinion-based, and hybrid models. We consider as correlated company pairs that demonstrate similar stock-price variations, and selected these as the gold standard for evaluation. Results show that opinion-based and collocation-based models complement each other, and that integrated models perform the best. The top 25, 50, and 100 pairs discovered achieve precision rates of 1, 0.92, and 0.79, respectively.
-
Lutz, H.: Back to business : was CompuServe Unternehmen bietet (1997)
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- Date
- 22. 2.1997 19:50:29
- Source
- Cogito. 1997, H.1, S.22-23
-
Feeney, A.: Internet applications : Stumper-L (1993)
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- Abstract
- Describes STUMPERS-L, a electronic mailing list on Internet which provides a forum for reference librarians and other information professionals to find assistance with difficult reference questions. Describes how it was developed and its use
- Object
- STUMPERS-L
-
Ulrich, P.S.: ¬Die Antwort ist irgendwo da draußen... : Kooperative Auskunft mit der Mailing-Liste 'Stumper-L' - Arbeitsweise und Erfahrungen (1997)
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- Stumpers-L
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Kalok, L.: Hochschulinformationssysteme auf der Basis der Gopher-Software (1993)
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-
Siegele, L.: Im Jahr 2000 sollen alle Schulen am Netz sein (1997)
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-
Zorn, P.; Emanoil, M.; Marshall, L.; Panek, M.: Advanced searching : tricks of the trade (1996)
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-
Andresen, L.: Z39.50 update (2000)
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-
Veittes, M.: Electronic Book (1995)
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- Source
- RRZK-Kompass. 1995, Nr.65, S.21-22
-
Nanfito, N.: ¬The indexed Web : engineering tools for cataloging, storing and delivering Web based documents (1999)
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- Date
- 5. 8.2001 12:22:47
- Source
- Information outlook. 3(1999) no.2, S.18-22
-
Verkommt das Internet zur reinen Glotze? : Fertige Informationspakete gegen individuelle Suche: das neue 'Push-Prinzip' im Internet ist heftig umstritten (1997)
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- Date
- 18. 1.1997 12:15:22
- Source
- Kölner Stadtanzeiger. Nr.69 vom 22/23.3.1997, S.MZ7
-
Filk, C.: Online, Internet und Digitalkultur : eine Bibliographie zur jüngsten Diskussion um die Informationsgesellschaft (1996)
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- Date
- 5. 9.1997 19:22:27
- Source
- Rundfunk und Geschichte. 22(1996) H.2/3, S.184-193
-
Balas, J.: ¬The Internet and reference services (1995)
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- Abstract
- Looks at resources available on the Internet to help librarians use it effectively in reference services. Covers: resource guides, subject guides to resources, and directory services and indexes. Difficult reference questions can be answered through use of mailing lists e.g. Stumpers-L
- Object
- Stumpers-L
-
McGillis, L.: Gopher searching using Veronica (1994)
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Siegele, L.: ¬Die "¬Internationale" des Internets : Guerilla- und Protestbewegungen im Netz machen den Regierungen weltweit zu schaffen (1997)
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Craney, L.: Web page authoring tools : comparison and trends (1996)
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Siegele, L.: http://wwwo sind die Gewinne? : Im Cyberspace werden ökonomische Prinzipien auf den Kopf gestellt: Angebot und Interesse wachsen, aber niemend will zahlen (1997)
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Brochard, C.; Ruck, V.: Internet : das sechste Medium? (2000)
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Condron, L.; Tittemore, C.P.: Library catalogs on the Web (2002)
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Fetters, L.: ¬A book-style index for the Web : the University of Texas policies and procedures website (1998)
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