There are described methods used to minimize data files dimension. There are defined indicators for measuring size of files and databases. The storage optimization process is based on selecting from a multitude of data storage models the one that satisfies the propose problem objective, maximization or minimization of the optimum criterion that is…

It is important for teachers of mathematics to know how pupils react to certain mathematical situations and what these reactions imply, in order to design more effective instructional environments based on their learning needs. This study reports the development processes of a digital learning tool (Learning Tool for Elementary School Teachers…

Electronic examination systems, which include Internet-based system, require extremely complicated installation, configuration and maintenance of software as well as hardware. In this paper, we present the design and development of a flexible, easy-to-use and secure examination system (e-Test), in which any commonly used computer can be used as a…

Discusses the pricing of computer services. (PF)

This description of procedures for dumping high and low resolution graphics using the Apple IIe microcomputer system focuses on two special hardware configurations that are commonly used in schools--the Apple Dot Matrix Printer with the Apple Parallel Interface Card, and the Imagewriter Printer with the Apple Super Serial Interface Card. Special…

Discusses problems resulting from incompatible computer systems. Outlines how to make interchange of data possible between systems. Concludes that with the popularity of microcomputers increasing, learning how to make information compatible between systems is essential. (BSR)

Explains format of data on magnetic tape and process of reading and writing data to tape, and discusses sources of tape errors (physically damaged tape, unclean tape, magnetic alteration of data on tape, unclean or defective tape drive); correcting and/or bypassing tape errors; and care, storage, and shipment of tapes. (EJS)

Electronic attendance accounting system reduces time and personnel needs in Phoenix, Arizona. (Author)

Reviews current terminology related to personal computing, referring to a previous article written five years ago. Highlights include Macintosh processors; Pentium processors; computer memory; computer buses; video displays; storage devices; newer media; and miscellaneous terms and concepts. (LRW)

Introduces this issue, which contains papers from the 1991 Data Compression Conference, and defines data compression. The two primary functions of data compression are described, i.e., storage and communications; types of data using compression technology are discussed; compression methods are explained; and current areas of research are…

Explains the function and operation of the Chemical Registry System operated by Chemical Abstracts Service (CAS). (CP)

Provides a technological overview of CD-ROM (Compact Disc-Read Only Memory), an optically-based medium for data storage offering large storage capacity, computer-based delivery system, read-only medium, and economic mass production. CD-ROM database attributes appropriate for information delivery are also reviewed, including large database size,…

Second installment of directory published in four parts in "Database" (June and August) and "Online" (July and September) provides descriptions of 17 laserdisk products together with information on the producer, compatibility, type of laserdisk, search and retrieval software, interface with magnetic media, conditions of usage, price, and status.…

Describes a recently developed new dimension in management and educational concepts. (Author)

Tells why certain kinds of books appear to be threatened by both the new technology and by attacks on the copyright system. (Author/DR)