重访阮冈纳赞

印度学者S.R.阮冈纳赞提出的"图书馆学五定律",虽然在20世纪90年代的计算机图书馆和信息服务中依然被使用着,但仍需增补两条原则"每位读者都拥有他的图书馆"和"每位作者都可向图书馆供稿".     

Multiple Versions Revisited

Summary

The entityrelationship model in the IFLA draft Functional Requirements of Bibliographic Records (FRBR) provides a useful mechanism for reexamining the multipleversions problem in serials cataloging. The model provides a hierarchy of levels of abstraction that accommodates versions at both the concrete level of an exact reproduction of text, etc. (the manifestation level), and a more abstract level of an approximate reproduction of essential content (the expression level). Such a flexible model is especially useful given the expansion of novel version classes, especially that of dynamic remotely-accessible electronic documents. But along with the increase in usefulness afforded by the FRBR model comes an inevitable increase in ambiguity regarding what constitutes a version within the model, and at what level of that model, and ultimately what constitutes a work.     

Full Text Revisited

No abstract available for this article.     

The Fair Gaden Revisited

No abstract available for this article.     

The Reserve Department Revisited

The Future Voices in Public Services column is a forum for students in graduate library and information science programs to discuss key issues they see in academic library public services, to envision what they feel librarians in public service have to offer to academia, to tell us of their visions for the profession, or to tell us of research that is going on in library schools. We hope to provide fresh perspectives from those entering our field, in both the United States and other countries. Interested faculty of graduate library and information science programs who would like their students' ideas represented in these pages are invited to contact Nancy H. Dewald at nxd7@psu.edu.

Heather Dodge is a recent graduate of Long Island University's Palmer School of Library and Information Science and has completed an additional Master's degree in Humanities and Social Thought from NYU's Draper Program for Humanities and Social Thought. In this column, she discusses the effective development of chat reference competencies.

The ALA-Accredited Palmer School of Library and Information Science was established in 1959 at Long Island University's (LIU) Post campus. Palmer's mission is to empower information professionals through education, research and achievement. The Palmer School offers a Doctorate in Information Studies; the Master of Science in Library and Information Science with optional concentrations in Archives and Records Management, Rare Books and Special Collections; Advanced Certificates in both Archives and Records Management and in Public Library Administration. The School also offers a Masters in Science in School Library Media. The Archives and Records Management certificate can be taken post-Master's or concurrently as part of the MSLIS program and is now offered both face-to-face and online.     

期刊订购原则的重新评估

在网络环境下,需要重新评估和调整馆藏期刊的建设原则。在对期刊的如下情况：①读者使用情况;②核算期刊使用成本;③期刊被各大检索工具收录的情况;④国内其它图书馆收藏情况等等,进行充分调研的基础上,确定哪些期刊由图书馆订购,哪些期刊通过文献传递服务获得。这样既能节约图书馆的经费,同时也能给读者提供多样化的服务,扩大了期刊文献资源的获取量。     

The Probability Ranking Principle Revisited

A theoretic framework for multimedia information retrieval is introduced which guarantees optimal retrieval effectiveness. In particular, a Ranking Principle for Distributed Multimedia-Documents (RPDM) is described together with an algorithm that satisfies this principle. Finally, the RPDM is shown to be a generalization of the Probability Ranking principle (PRP) which guarantees optimal retrieval effectiveness in the case of text document retrieval. The PRP justifies theoretically the relevance ranking adopted by modern search engines. In contrast to the classical PRP, the new RPDM takes into account transmission and inspection time, and most importantly, aspectual recall rather than simple recall.