Duplication Issues Research Articles

Analysis of format duplication in an academic library collection

The issue of format duplication in academic library collections is increasingly complicated and perplexing in an environment of static or dwindling resources, soaring user expectations, dynamic access models, and inconsistent and changing publisher and vendor pricing structures. The problem is further complicated for libraries serving a university with multiple campus locations. This paper surveys recent investigative projects and highlights the work of a Duplicate Formats Task Force at Pennsylvania State University charged with determining the extent and nature of format duplication at that institution.

The centrosome in early drosophila embryogenesis

Publisher Summary The early Drosophila embryo is a useful system for functional studies of the centrosome. This organelle plays essential and diverse roles in guiding nuclear movement and cytoskeletal reorganization during the initial 3 hours of development. Drosophila embryogenesis begins with 13 synchronous nuclear divisions that occur without accompanying cytokinesis. The divisions immediately following fertilization proceed as an expanding ball in the interior of the embryo. The centrosome-based activities coordinate nuclear and cytoskeletal dynamics during these divisions. Because Drosophila is amenable to molecular genetic, biochemical, and a variety of cellular approaches, the mechanisms underlying many activities of the centrosome in the early embryo are addressed. This chapter discusses the mechanisms that control centrosome movement and migration, the role of the centrosome in coordinating nuclear and cytoskeletal events of the cell cycle, and how the centrosome directs the dramatic microfilament and plasma membrane rearrangements at the cortex. The mechanism of centrosome duplication and its regulation and the issues of ultrastructure, composition, duplication, separation, fertilization, mitotic, and precortial division are described and provide insights into centrosome function.

Firstsearch: collection management and academic libraries

Looks at issues of database or file duplication between CD‐ROM and online services like Firstsearch, establishing card sales policies and procedures plus increased file usage. Demonstrates how librarians conducted a Firstsearch field test, advertised the Firstsearch Catalog, and balanced what was expressed as a choice between access to more than 20 databases and accepting a novice interface.