Effectively Utilizing Computer-Aided Design Technology: The Role of Individual Difference Variables

Computer graphics and computer-aided design (CAD) technology is rapidly changing design and manufacturing in American industry. This paper sets forth a model of the individual difference factors which may impact task performance and affective reactions to the use of CAD technology. A standardized, scorable engineering task was developed which utilizes CAD technology, and a number of individual difference variables were examined with reference to the task. Results indicate that cognitive skills were strongly related to\u27 CAD engineering performance, user confidence, and perceived task difficulty. Experience and attitudinal variables were not found to be related to the measured outcomes Implications for employee selection and suggestions for future research are not provided

Mathematical surprises and Dirac's formalism in quantum mechanics

By a series of simple examples, we illustrate how the lack of mathematical concern can readily lead to surprising mathematical contradictions in wave mechanics. The basic mathematical notions allowing for a precise formulation of the theory are then summarized and it is shown how they lead to an elucidation and deeper understanding of the aforementioned problems. After stressing the equivalence between wave mechanics and the other formulations of quantum mechanics, i.e. matrix mechanics and Dirac's abstract Hilbert space formulation, we devote the second part of our paper to the latter approach: we discuss the problems and shortcomings of this formalism as well as those of the bra and ket notation introduced by Dirac in this context. In conclusion, we indicate how all of these problems can be solved or at least avoided.Comment: Largely extended and reorganized version, with new title and abstract and with 2 figures added (published version), 54 page

Joseph Thomas, Le Mouvement baptiste en Palestine et en Syrie (150 av. J.-C. -300 ap. J.-C.). Universitas Catholica Lovaniensis. Dissertat. Série II. Tome 28, 1935

Gueutal F. Joseph Thomas, Le Mouvement baptiste en Palestine et en Syrie (150 av. J.-C. -300 ap. J.-C.). Universitas Catholica Lovaniensis. Dissertat. Série II. Tome 28, 1935. In: Revue d'histoire et de philosophie religieuses, 17e année n°3, Mai-juin 1937. pp. 291-295

Joseph Thomas, Le Mouvement baptiste en Palestine et en Syrie (150 av. J.-C. -300 ap. J.-C.). Universitas Catholica Lovaniensis. Dissertat. Série II. Tome 28, 1935

Gueutal F. Joseph Thomas, Le Mouvement baptiste en Palestine et en Syrie (150 av. J.-C. -300 ap. J.-C.). Universitas Catholica Lovaniensis. Dissertat. Série II. Tome 28, 1935. In: Revue d'histoire et de philosophie religieuses, 17e année n°3, Mai-juin 1937. pp. 291-295

De l'éclosion chez un Opilion : Phalangium opilio L

Gueutal J. De l'éclosion chez un Opilion : Phalangium opilio L. In: Bulletin de la Société entomologique de France, volume 49 (2-3), Février-mars 1944. pp. 24-26

De la digestion et du jeûne chez le Grillon domestique

Gueutal J. De la digestion et du jeûne chez le Grillon domestique. In: Bulletin de la Société entomologique de France, volume 47 (10), novembre 1942. pp. 160-162

Remarques sur quelques réactions nucléaires par interaction directe aux énergies d'une centaine de Mev

The nuclear reactions (p, 2p), (p, pn), (p, d), (p, dn) and (p, dp) in the energy range around 150 MeV are analysed from the point view of the momentum distribution of nucleons in nuclei.La possibilité d'obtenir des renseignements sur la distribution des quantités de mouvement et sur les corrélations entre paires de nucléons dans les noyaux, à l'aide des réactions nucléaires par interaction directe»aux énergies d'une centaine de MeV est discutée. Les réactions considérées sont les réactions (p, 2p), (p, pn), (p, d), (p, dn) et (p, dp)

AN EMPIRICAL INVESTIGATION OF THE PERCEPTUAL DIMENSIONS OF JOBS

This research investigates the perceptual dimensions of jobs. Several job design theories have suggested that perceptual job characteristics may be used to predict work outcomes such as job satisfaction and internal work motivation. A review of the development of these models (e.g., Turner and Lawrence, 1965; Hackman and Oldham, 1974) is undertaken with the conclusion that none of these is based on an empirically derived set of task characteristics. Therefore, the adequacy of these previous sets of task characteristics for representing the perceptual dimensions of jobs cannot be demonstrated. Using multidimensional scaling techniques, the present study develops an empirically based set of job dimensions. The pilot study, involving eighty-eight undergraduate management students, developed a set of stimulus job titles and aided in refining the data collection procedures used in the main investigation. The main investigation consisted of asking subjects (158 undergraduate and graduate management students) to rate the similarity of the stimulus job titles to one another in terms of the work activities of incumbents performing the jobs. Subjects also rated the stimulus job titles on a standard job characteristics questionnaire and completed measures of several individual difference variables. The similarity data are scaled in accordance with the Horan Scaling Model. Subjects are randomly divided into three groups, termed replications. Scalings of each replication are compared with one another and a very high degree of convergence is found. This is interpreted as evidence for the stability of the scaling solutions across the samples. The replications are then collapsed into a single group and the final scaling solution derived. The ratings of the stimulus jobs on the job characteristics measure are correlated with the job title coordinates on the recovered dimensions to aid in assigning descriptive labels. It is concluded that jobs are viewed along three dimensions, representing professionalism, interaction with the public, and physical labor/cleanliness. In addition, evidence is not found to warrant the conclusion that the individual difference variables--field independence/dependence, cognitivie complexity, and degree of prior work experience--affect the dimensionality of job perceptions. The results of the present study suggest that previous job design models have employed task characteristics sets which describe only the job complexity dimension. Revisions of existing job characteristics measures are suggested in order to more adequately sample the perceptual space of jobs, and thereby increase the criterion-related validity of such measures