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Graham Wright 《Health information and libraries journal》1986,3(4):269-269
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Requests for monographs generated within an interlibrary loan network are analyzed for half-life statistics. It is suggested that demand represents use of the literature more completely than satisfied requests or circulation statistics. Demand in this study is characterized as either regional demand or statewide demand and is related to the level of the network where final processing of the request occurs. A negative exponential distribution is found to adequately characterize both levels of demand as a function of publication date for four subject categories. Corrected demand data is obtained by removing the growth rate of most of the available literature represented by American book publisher output. Based on over 10,000 interlibrary loan requests, negative exponential distributions describe the raw data as well as the corrected data. A shorter half-life was found for regional library demand (10.47 yr) than that found for statewide library demand (15.75 yr). Applying the correction factor to reflect the growth rate of the available literature tends to increase the half-life when compared to the raw data, and changes the ordering of subject classes with respect to ascending half-lives. 相似文献
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David Graham Burnett 《Innovative Higher Education》1985,10(1):43-54
Portfolio assessment has become a standard mechanism for the evaluation of prior learning for experienced students. The assessment of such learning in terms of the traditional liberal arts disciplines raises basic questions about the relationship of liberal learning to lived experience and about liberal learning outcomes. An informal survey of portfolio narratives receiving faculty approval for credit at various post-secondary institutions indicates a wide range of declarative, analytical, and interpretive assertions recognized as learning in these disciplines.I wish to thank the following institutions: Sinclair Community College, Clark University, the University of Alabama, and Indiana University who were kind enough to share materials on record while preserving the confidentiality through the removal of names, dates, etc. 相似文献
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