Jul 17, 2015
Devi Ahilya Vishva VidhyalyaTaksha Shila Campus, Khandwa Road, Indore
Bibliographic Coupling & ObsolescenceA presentation submitted against the unit test-3 (707) for the completion of M. Phil. In Library & Information Science, Second Semester (Session 2010-11)
Submitted by: Guided By:Ritesh Tiwari Ms. Aarti SharmaRoll No. 16 Lecturer (SLIS, UTD, DAVV)
ContentsWhat is Bibliographic CouplingProgress of Bibliographic CouplingCriticism of Bibliographic CouplingSimilar term: Co-Citation Coupling Bibliographic Coupling V/s Co-citationUse of Bibliographic CouplingWhat is ObsolescenceReasons for Declination in usageCriteria used for measuring the DeclinationConclusionReferences
What is Bibliographic Coupling ? When two works refer the common work(s) then the relation between two referring documents is called Bibliographic coupling. We can say The coupling strength is higher when more citations, the two referring works have in common. This coupling shows the similarity of subject matter of the two works. Bibliographic coupling is respectively valuable in all fields of research since it helps the researcher to find related research done in the past. The term "bibliographic coupling" was first introduced by MM Kessler in a paper published in 1963, and has been embraced in the work of the information scientist Eugene Garfield.
Progress of Bibliographic Coupling: There was a progression of citation study methods from bibliographic coupling to co-citation analysis (1973) to author co- citation analysis(1981).In 1973, Henry Small introduced what he concluded was a better indicator of subject similarity, document co-citation analysis.In 1981 Howard White and Belver Griffith moved to author cocitation analysis (ACA).
Criticism faced by Bibliographic Coupling:By Martyn (1964, p. 236)- he analyzed that, a bibliographic coupling is merely an indication of the existence of relationship between two documents rather than a constant unit of similarity. Virgo (1971, p. 289)- He concluded that critical threshold value for the coupling strengths possibly varies from field to field and even within fields.Weinberg (1974) predicts that bibliographic coupling should work best for repetitive literature (e.g., review articles) because such literature often cite a lot of older works. Vladutz & Cooks (1984) results- In their validation study, taking a random selection of 10.000 articles from the SCI. They concluded that other parameters may give better results than bibliographic coupling.
Similar term- Co-citation coupling:Co-citation Coupling Is the mirror image of Bibliographic coupling Co-citation coupling is a method used to establish a subject similarity between two documents. If papers A and B are both cited by paper C, they may be said to be related to one another, even though they don't directly cite each other. If papers A and B are both cited by many other papers, they have a stronger relationship. The more papers they are cited by, the stronger their relationship is.
Bibliographic Coupling V/s Co-Citation Coupling
Use of Bibliographic Coupling:In finding relationship between two subjects.In finding relationship between two different articles.To get help in finding topics for research by researchers.To evolve new merged subjects.To understand the development of new subject.To understand the pattern of research in any field.To understand the future demand by publisher.To map the utility of the document.To get help in collection development of libraries.
What is Obsolescence? Obsolescence is the phenomenon of the reduced use or decline in the use of information (on a certain topic) by the time. Obsolescence study might be useful for solving following questions:
when to discard older Volumes, how long to keep new ones, what sort of retrospective storage and access in information retrieval system should provide
Reasons for Declination in usageIf the concern is with knowledge, obsolescence may be defined as a decline over time in the validity or utility of Information. Such decline may be occurred by following reasons:The information is valid, but incorporated in later work. The information is valid, but superseded by later work.The information is valid, but is in a field of declining interest; The information is no longer valid.
Criteria used for measuring the Declination:Age of the document.Citation to the document in the subsequent literature.Utilization of document.
Following terms are also important if, we discuss about the obsolescence and required to be put here:
Age: Period From origin to the actual use of the document is called age of that particular document.
Useful Age: Period of time during which the citation getting by a particular literature or periodical.
Half Life: Time from the origin of the document to its useful life on its maximum use up to that time is called Half life of that document.
Conclusion: Bibliographic coupling, Co-citation Coupling and obsolescence all are the important part of Bibliographic study as well as Research. These tools are helpful, to Researchers, Libraries, Publishers, and Authors up to great extant. Bibliographic Coupling and Co-citation coupling help to understand the pattern of new subjects and development of new subjects as well and Obsolescence provide help to analyze the utility and useful life of the document or Information. Obsolescence is also very useful for the libraries and publisher as well as it could help in understanding the demand and utility of the particular document.
Reference:Class notes of Ms. Aarti Sharmahttp://en.wikipedi.org/ http://www.iva.dk/http://www.ischool.utexas.edu/
ANY QUESTION PLEASE?