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The purpose of this paper is to compare two different tools for tolerance analysis. Tolerance analysis is an important task to design and manufacture high-precision mechanical assemblies; it has received considerable attention in the literature. Many are the tools required to carry out a tolerance analysis, and may be divided into two categories: the analytical models and the statistical software packages. No comparison exists in the literature among these two categories.

This work presents a comparison between two different approaches to tolerance analysis: an analytical method, the variational model, and a statistical software, eM-Tolmate. The comparison has been developed on the same aeronautical case study that constitutes an actual product.

The proposed approach has been applied to an aeronautical case study. The results of the case study show how, when 2D tolerance analysis problems need to be solved, the two adopted tools give the same results. When the complexity of the tolerance analysis problems increases, the statistical software becomes the only choice to use. The new findings of the present paper are related to the fact that computer-aided tolerance analysis software packages remain the only choice to approach actual complex industrial products despite the extensive development of theoretical research.

This paper deals with a unique case study. However, the two adopted approaches and the obtained results are general, that is, they may be applied to any assembly.

Tolerance analysis is a valid tool to foresee geometric interferences among the components of an assembly, before getting the physical assembly. It involves a decrease of the manufacturing costs.

Many are the tools for tolerance analysis, such as different analytical models and different commercial software packages. Some are the comparisons among the different tools in the literature, but they are not exhaustive. Therefore, when a user has to solve an assembly problem to foresee the geometric interferences during the design stage, he/she does not know what to choose. The original contribution of the paper is to address the user’s choice through a comparison between an analytical model and a statistical software to solve the tolerance analysis problems of an actual aeronautical assembly.

There are now a number of microcomputer packages intended for almost every library routine and application, although in some cases the choice is limited. The principal features of many of these packages are discussed and related to the requirements of the routines for which they are intended. These include information retrieval, online searching, catalogues, acquisitions, serials control and circulation control.

Describes the facilities, installation and use of CAT ME Plus. Discusses the software requirements, workflow with batch cataloguing and searching, changes that make the new software more efficient, the menu design of CAT ME Plus, and the included training booklets.

CATS provides most of the needed acquisitions operations for a typical library. It is easily mastered and straightforward, even for the most unsophisticated user. CATS is versatile, flexible and essentially free of awkward demands and hidden traps. For those who already own the dBase III database package, on which CATS depends for its operation, the price of CATS is certainly an attractive one. Libraries needing instant acquisitions automation should give it serious consideration. CATS runs on IBM/PCs and compatible computers. It requires the use of the dBase III database package. CATS sells for $100 from David Morse or Alice Karasick, USC Norris Medical Library, 2003 Zonal Ave., Los Angeles, CA 90033, USA. (213) 224–7413.

A growing body of research outlines how to best facilitate and ensure methodological rigor when using dictionary-based computerized text analyses (DBCTA) in organizational research. However, these best practices are currently scattered across several methodological and empirical manuscripts, making it difficult for scholars new to the technique to implement DBCTA in their own research. To better equip researchers looking to leverage this technique, this methodological report consolidates current best practices for applying DBCTA into a single, practical guide. In doing so, we provide direction regarding how to make key design decisions and identify valuable resources to help researchers from the beginning of the research process through final publication. Consequently, we advance DBCTA methods research by providing a one-stop reference for novices and experts alike concerning current best practices and available resources.

The bibliographic record is the link between the software packages discussed in this article: cataloguing and acquisitions. Cataloguing software ranges from sophisticated online public access catalogues to cheaper and simpler software designed to produce catalogue entries for an existing manual system (e.g. cards). The range of acquisitions software is equally wide encompassing packages which simply print an order from data which is keyed in to those which incorporate the whole process of acquisitions from the recommendation stage through to receipt and full fund accounting. This article, the fourth in the series, describes the different features with examples, and concludes with a discussion on the nature of integrated systems.

Software tools are programs which perform simple functions and have simple interfaces. They can be easily put together to make complete systems; and their use for library automation represents a middle path between ‘off the shelf’ packaged software and software which is entirely coded in a programming language. After discussing software tools in connection with the UNIX operating system, this paper describes an experimental system for periodicals control. An analysis of the software is presented which indicates the benefits that stem from using software tools, and some figures on machine timing are given.

The Commercial Invoice is the first EDI message to gain worldwide acceptance, and it has been registered as a standard by the United Nations. The action was hailed by the Commission of European Communities (CEC) as a significant step towards the international agreement on technical standards needed in order for electronic communications to gradually replace paperwork in world trade.

Lotus Development Corp. and Ziff Communications Co. have teamed up to develop a CD‐ROM application called Computer Library, available from Ziff Communications Co., One Park Ave., New York, NY 10016 (phone: 212–503–4400).

At its regular meeting on April 25, the OCLC Board of Trustees and OCLC President Rowland C. W. Brown announced that Mr. Brown will relinquish his responsibilities as president and chief executive officer of OCLC during the coming year.