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3 edition of Diachronous vs. synchronous study of obsolescence found in the catalog.

Diachronous vs. synchronous study of obsolescence

Diachronous vs. synchronous study of obsolescence

  • 370 Want to read
  • 2 Currently reading

Published by University Microfilms International in Ann Arbor, Mich .
Written in English

    Subjects:
  • Genetic literature.,
  • Citation analysis.

  • Edition Notes

    Statementby Eddie Ray Stinson.
    The Physical Object
    FormatMicroform
    Pagination1 microfilm reel
    ID Numbers
    Open LibraryOL21670448M

      The attached movie in the vertical menu bar shows how this erosional surface transgresses time, or is diachronous, wherever the landward edge of the sea rises over an underlying sedimentary surface. If the transgressive surface is equated to the ravinement surfaces in outcrop, then it should be recognized that these are diachronous too! Stinson, Eddie Ray. "Diachronous vs. Syn-chronous Study of Obsolescence." Illinois (). Major advisor, F.W. Lancaster. Wiggins, Gary D. "Factors which Influence the Choice of External Document Deliv-ery Mechanisms for Serials by Selected Scientific and Technical Special Librar-ians." Indiana (February ). Major ad-visor, Herbert S. White.

    Obsolescence has been described as having two kinds when it comes to documents: synchronous obsolescence, which looks in the past by for example examining how old the references which are used in a scientific paper are, and diachronous obsolescence, which selects a point in the past from which to look at how many. Stinson, R. and Lancaster, F.W. Synchronous versus diachronous methods in the measurement of obsolescence by citation studies. Journal of Information Scie 2 (Apr. ), Száva-Kováts, E. Unfounded attribution of the 'half-life' index-number of literature obsolescence to Burton and Kebler: A literature science study.

    (geology) Varying in age from place to place Alternative form of diachronic Results using synchronous and diachronous studies are often different and do not take into account the growth of literatures, which could affect citation counts received by a given paper. drawing inferences from synchronous studies which, like the present study, deal with use measurements taken at a single time, but which should properly be made only from diachronous studies (which "follow the use of particular items through successive observations at different dates"). The present study knowingly commits this error.


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Diachronous vs. synchronous study of obsolescence Download PDF EPUB FB2

Using the literature of human and medical genetics, the results of a synchronous citation study of obsolescence over a year period were compared with the results of a di achronous citation study Cited by: In addition to the number of times a book is loaned out, the change in the number of loans over time can be a useful measure for managing books.

In this study, we investigate the relationship between diachronous obsolescence (that is, the change in use over time) and synchronous obsolescence (that is, the distribution of use over the elapsed.

This study is basically a comparison of two ways of measuring obsolescene--synchronous and diachronous--within the subject of human and medical genetics. Synchronous studies are made on records of use or bibliographic Diachronous vs.

synchronous study of obsolescence book made at one point. 65 Synchronous versus diachronous methods in the measurement of obsolescence by citation studies * E.

Ray Stinson Office of Sponsored Programs, University of Texas Medical Branch, Galveston, TX, U.S.A. F.W. Lancaster Graduate School of Library and Information Science, University of Illinois, Urbana, IL, U.S.A.

Received 24 September Revised 13 November a diachronous obsolescence in book use in the Nara University library in Japan. Diachronous obsolescence can be approximated by a “synchronous 5 ” obsolescence, that is, the distribution of use with the “oldness” of the books over. We prove that, in the synchronous case, an increase of growth implies an increase of the obsolescence, while, in the diachronous case, exactly the opposite mechanism is found.

Exact proofs are given, based on the exponential models for growth as well as obsolescence. We leave open a Cited by: CITATION STUDIES. OBSOLESCENCE. One major theme of our earlier article was the distinction between. synchronous.

and. diachronous obsolescence. and the need to allow for growth of the citable literature in synchronous studies; there had been a very large growth of literature in most subjects, especially the sciences and social sciences.

PDF | Collection management in libraries should be conducted on the basis of analyses of circulation data. In addition to the number of times a book is | Find, read and cite all the research. Synchronic study of literature obsolescence: The case of Lotka's Law Article (PDF Available) in Investigación bibliotecológica: índice acumulativo 28(63) May with 72 ReadsAuthor: Ruben Urbizagastegui.

Stinson, Eddie Ray. Diachronous vs. synchronous study of obsolescence. Stinson, Eddie Ray, Lancaster, F. Diachronous vs. synchronous methods in the measurement of obsolescence by citation Studies. Seymour, Carol A. Weeding the collection: a review of research on identifying obsolete stock: monographs (part 1 Cited by: 6.

Assuming an increasing exponential function for production and a decreasing one for aging, we show that, in the synchronous case, the larger the increase in production, the larger the obsolescence.

In the diachronous case the opposite relation holds: the larger the increase in production the smaller the obsolescence by: Abstract: A synchronous study on four years' proceedings of the International Conference on Information Systems (ICIS) is conducted in order to determine the obsolescence rate for Information Systems (IS) literature.

This study finds that IS literature has a relatively high obsolescence rate, similar to that of literature in the fields of engineering and technology-dependent "hard" sciences.

quantify the IS obsolescence rate. This study also categorizes the types of documents referenced by ICIS papers, and examines the obsolescence rates for these different formats. Research Methodology Two types of measures are in common use: synchronous obsolescence and diachronous obsolescence.

diachronous and synchronous studies: obsolescence increases in synchronous studies (like the work carried out by Verstak et al.) and decreases in diachronous studies (like the work carried out by Davis and Cochran).

Other authors like Nakamoto () claimed however the equivalence of synchronous and diachronous approaches on the. The publication-citation matrix and its derived quantities 1 Royal School of Library and Information Science, Department of Information Studies & Center for Informetric Studies, Birketinget 6, DK Copenhagen S, Denmark difference between the synchronous and the diachronous impact factor.

Define diachronous. diachronous synonyms, diachronous pronunciation, diachronous translation, English dictionary definition of diachronous. n geology the passage of a geological formation across time planes, as occurs when a marine sediment laid down by an advancing sea is noticeably younger in.

A practical line in bibliometrics A practical line in bibliometrics Jack Meadows Purpose – The purpose of this article is to describe Maurice Line’s continuing interest in bibliometrics and in its possible application to library problems since the s.

He has especially emphasized two strands. One is the concept of obsolescence and how it applies in : Jack Meadows. Education ; Several studies have shown an inverse relation between level of education and susceptibility to obsolescence.

Therefore, it is expected those that engineers who have attained higher degree levels will report lower levels of obsolescence. Group Membership ; Many studies have shown the influence that groups have on inenber behavior. CITATION STUDIES OF OBSOLESCENCE One major theme of our earlier article was the distinction between synchronous and diachronous obsolescence and the need to allow for growth of the citable literature in synchronous studies; there had been a very large growth of literature in most subjects, especially the sciences and social sciences.

Kamila Pope is an environmental lawyer and researcher. She is a member of the World Commission on Environmental Law (WCEL/IUCN), the Experts Committee at Halte à l'Obsolescence Programmée (HOP), and Harmony with Nature Knowledge Network Experts (HwN/UN).Kamila is the author of "Understanding planned obsolescence" and has many book chapters, papers and articles published Author: Kamila Pope.

citation pattern in Library Science Dissertations. Obsolescence implies a relation between use and time and the effect of time which are effects of time past, time present and time future that can be investigated in two main ways.

These are Synchronous Studies and Diachronous Studies.A diachronous unit is a time unit that is bounded by non-synchronous lower and upper boundaries.

Such a period may be represented by the unequal lengths of time required for deposition of a lithostratigraphical or biostratigraphical unit. Deformational-diachronous units are similarly the unequal lengths of time taken up by deformational events.Synchronic linguistics is one of the two main temporal dimensions of language study introduced by Saussure in his "Course in General Linguistics" ().

The other is diachronic linguistics, which is the study of language through periods of time in history. The first looks at a snapshot of a language, and the other studies its evolution (like a Author: Richard Nordquist.