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At least 19 recordsLinked to original sources

Why bad projects are so hard to kill.

Even at the prototype stage, experts were saying the technology was obsolete. Yet, in the face of tepid consumer response, the company stubbornly kept increasing production capacity and developing new models. By the time it was finally killed, the initiative had cost the company an astounding $580 million and had tied up resources for 14 years. The product was RCA's SelectaVision videodisc recorder, and its story is hardly unique. Companies make similar mistakes--if on a somewhat smaller scale--all the time. But why? No one comes to work saying, "I'm going to pursue a project that will waste my company millions of dollars." Quite the opposite. They come to work full of excitement about a project they believe in. And that, surprisingly, can be the root of all the trouble--a fervent belief in the inevitability of a project's ultimate success. Starting, naturally enough, with a project's champion, this faith can spread throughout the organization, leading everyone to believe collectively in the product's viability and to view any signs of impending doom merely as temporary setbacks. This phenomenon is documented here in two chillingly detailed case studied, one involving Essilor, the world's largest maker of corrective lenses for eyeglasses, and the other involving Lafarge, the largest producer of building materials. By counterexample, they point the way toward avoiding such morasses: assembling project teams not entirely composed of like-minded people and putting in place--and sticking to--well-defined review processes. Both cases also show that if it takes a project champion to get a project up and running, it may take a new kind of organizational player--an "exit champion"--to push an irrationally exuberant organization to admit when enough is enough.

Commerce↗

Electronic imaging in endoscopy.

Endoscopy evolved from a hollow tube view of visually restricted areas into an expansive, distal representation of the anatomy. Rod lens telescopes, improved coherent imaging bundles, superior light sources, and other optical advances enhanced endoscopic observations. Yet complicated endoscopic procedures remained visible to the endoscopist alone, relegating assistance and consultation to verbal description of sophisticated visual observation. Instrumentational advances alone did not promote three crucial elements: participation, cooperation and documentation. The importance of these elements has increased with the need for coordinated assistance in complex operative endoscopic manipulations, as well as in a visual record for improved documentation and consultation. New imaging technologies are supplanting the unwieldy, often daunting equipment once required for photodocumentation. The charged couple device (CCD) 2/3 and 1/2 in. "chip" video camera miniaturization provides nearly weightless TV coobservation. Distal chip placement has created the "video endoscope". Combined with the 8 mm tape format, the chip has created a lightweight, single unit camera, monitor, and recorder. A recent advantage, magnetic disc recording, permits still video storage of up to 25 images. An electronic printer produces a hard color copy (4 x 5), which is inserted in the chart before the patient leaves the endoscopy room. The cost of the equipment can be shared in multidisciplinary institutions.

Costs and Cost Analysis↗

AI/LEARN: an interactive videodisk system for teaching medical concepts and reasoning.

This paper describes AI/LEARN, an educational videodisk system designed to teach clinical observational skills and reasoning in medicine. The AI/LEARN system uses a learning conditions approach to teaching. To teach visual concepts, we use the principle of exemplar/nonexemplar pairs and immediate feedback. To teach If-Then problem solving we use the format of minicases with delayed feedback. The software to operate the system has been custom developed and is domain independent. The result is a prototype of a new authoring package for videodisk teaching which operates on IBM compatible microcomputers. The medical domain selected for this prototype system was rheumatic diseases; the knowledge used to teach reasoning skills is derived from the knowledge base of an expert system: AI/RHEUM.

Computer Systems↗

Sources of variability in speechreading sentences: a generalizability analysis.

Generalizability theory (Cronbach, Gleser, Nanda, & Rajaratnam, 1972) was used to estimate the percentage of variance explained by three sources of variability in speechreading sentences: the subject, the talker, and the sentence materials. Videodisc recordings of the 100 CID Everyday Sentences (Davis & Silverman, 1970), spoken by a male and a female talker, were presented to 104 subjects with normal hearing. For performance on individual sentences (total number of words correct), the most important systematic sources of variability were the sentence (26.3%), the speechreader (10.5%), the talker (4.9%), and the interaction of talker and sentence (5.1%). Residual error accounted for 51.2% of the variance. Generalizability functions are presented, as a function of test length, for five models of test administration and interpretation. For 10-, 50-, and 100-item lists, generalizability is predicted to be .70, .92, and .96, respectively, for a single talker. Psychometric characteristics of these recordings of the CID sentences are also presented.

Adolescent↗

The ADONIS experiment.

The background to the setting up and implementation of the ADONIS project is described. Ways in which ADONIS might benefit both document supply centres and smaller organizations such as biomedical libraries are suggested. Particular attention is paid to economic considerations.

Commerce↗

The effects of delayed and displaced visual feedback on motor control.

Developments in television technology have made possible new approaches to the study of the role of visual feedback in motor control. In two experiments using a special videodisc recording and playback system, the effects of delaying for 66 msec a subject's view of his own hand during a target-directed movement was investigated. The observed effects of such visually delayed feedback compared to spatially distorted feedback produced by prisms led to three major conclusions: (a) despite the behavioral similarity (overshooting) induced by the two kinds of altered feedback, the role of each in the visual-motor control loop is different; (b) adaptation to and the after effect of the two kinds of altered feedback are based on different control mechanisms (c) the processing and use of visual information in hand control requires less time than previous experiments have indicated.

Journal Article↗

The use of natural language entry and laser videodisk technology in CAI.

One reason for the limited use of computer-assisted instruction in medical education has been that the writing of lessons often requires complex programming skills. Recently developed authoring systems for microcomputers now permit teachers unfamiliar with computers to write realistic clinical simulations for use in both instruction and evaluation. The authors in this paper describe the use of an authoring system which incorporates two important features: student interaction with the computer by natural language entry at the keyboard and the use of the microcomputer to direct a random-access laser videodisk player. For the purpose of evaluation, memory registers are employed to assign scores to several aspects of performance and to derive monetary costs for components of patient assessment and treatment. Similar registers are used to codify instructions for altering the clinical state of the simulated patient. The realistic simulations facilitate both problem-based learning and the evaluation of several cognitive aspects of clinical competence.

Computer-Assisted Instruction↗

Microcomputers, interactive videodisks, and psychodynamic simulations.

Recent endeavors have applied microcomputers and interactive laser/optical videodisks to create simulations of psychodynamic processes. This paper briefly describes the technical aspects of microcomputers and videodisks, explores attributes and drawbacks of these simulation systems, and outlines future directions toward the ideal psychodynamic simulation.

Computers↗

MEDLINE on CD-ROM: end user searching in a medical school library.

End users at the Medical College of Pennsylvania enjoyed searching CD-ROM versions of MEDLINE and judged such searches "extremely useful." To assess the effectiveness of their searches, a sample of 500 search statements from Compact Cambridge (CC) MEDLINE was examined. A high proportion of search statements (224, or 45 percent) retrieved no documents. Over one-third of search statements (185, or 37 percent) contained at least one error, which usually resulted in zero retrieval for that search statement. Searchers attempting to enter Medical Subject Headings were frequently defeated by the elaborate punctuation requirement of CC MEDLINE. "Missed opportunities" were evident in over three-fourths of search statements. One-on-one instruction and library classes may increase search success, but these measures reach a limited audience. Improvement in the search software itself is needed to help searchers improve the effectiveness of their searches.

Computer Literacy↗

The effect of CD-ROM MEDLINE on online end user and mediated searching.

Since 1970, Indiana University School of Medicine Library (IUSML) has traditionally been a high volume online searching institution. The library recently implemented an end user searching program which includes MEDLINE on CD-ROM. The effect of CD-ROM on online end user and mediated searching is discussed. Comparative statistics are provided by category of search service. CD-ROM has had a dramatic lowering effect on online end user searching and has had little effect on mediated searching. IUSML's experience with CD-ROM technology has been a positive one. Trained end users have become IUSML's greatest asset.

Computer User Training↗

CD Plus: MEDLINE on CD-ROM.

Developed by CD Plus (formerly Online Research Systems, Inc.), CD Plus MEDLINE is a welcome addition to the growing number of MEDLINE CD-ROM products. CD Plus MEDLINE offers monthly updates and coverage of the full MEDLINE database back to 1966. Some of its features include mapping to MeSH, explode capability, permuted term index, scope notes from the Annotated MeSH, and access to the tree structures. The system is designed for the novice as well as the professional searcher. The article takes a descriptive look at MEDLINE on CD Plus, its software, searching capabilities, limitations, special features, and system requirements.

Data Display↗

MEDLINE and PsycLIT on CD-ROM: a survey of users in an academic medical library.

A survey of users of PsycLIT and MEDLINE on CD-ROM was performed at an academic medical library. The questionnaire was designed to gather information about the user population, satisfaction of the users, the assistance needed to use the systems, and the type of searches being performed. The majority of users were graduate students in the schools of medicine, nursing, and pharmacy. In general, users were satisfied with the performance of the systems. Assistance from a librarian, printed documentation, or another patron was required by 85% of users, and they were generally satisfied with this assistance. Most searches were performed to obtain information on a subject. The results were remarkably similar for both databases.

Consumer Behavior↗