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System Evaluation (system + evaluation)

Distribution by Scientific Domains

Medical Sciences	40%
Engineering	40%

Selected Abstracts

Innovation of visualized interactive tools for learning molecular simulation curriculum

COMPUTER APPLICATIONS IN ENGINEERING EDUCATION, Issue 1 2010
Wen-Tsai Sung
Abstract The goal of molecular simulation stability is to predict the detailed structure and physical properties of molecules in bioengineer's experiment curriculum. This work succeeds in citing minimum energy and some computer graphics technologies to support this theme. Molecular structure is that given the uncountable number of possible conformations for a protein, how we can determine the lowest energy structure. In this article the authors employed the previous researches-WebDeGrator and some existing molecular graphics tools to simulate various protein folding, ligand acceptor interaction, and molecular visualization. For this reason, bioengineer experimental curriculum will be visualization and interactive among learning members. Finally, Simpson's Taxonomy and pre- and post-test examinations are applied to System Evaluation, and molecular simulation and minimum energy will be discussed. © 2009 Wiley Periodicals, Inc. Comput Appl Eng Educ 18: 28,40, 2010; Published online in Wiley InterScience (www.interscience.wiley.com); DOI 10.1002/cae.20226 [source]

Autonomic Nervous System Evaluation of Patients With Vasomotor Rhinitis ,

THE LARYNGOSCOPE, Issue 11 2000
Safwan S. Jaradeh MD
Abstract Objective To demonstrate the utility of quantitative neurological laboratory testing of autonomic nervous system dysfunction and to apply this methodology to further study the relation of chronic vasomotor (nonallergic) rhinitis to the autonomic nervous system. Methods It has been suspected that vasomotor rhinitis is due either to a hyperactive parasympathetic nervous system or an imbalance between it and the sympathetic nervous system. The exact relation has not been determined. Recently neurological laboratories have been developed in which a battery of tests can be performed to determine reactivity of the autonomic nervous system. Results Autonomic nervous system testing was performed on 19 patients with symptoms fulfilling the diagnostic criteria for vasomotor rhinitis and the results were compared with 75 sex- and age-matched control subjects. Patients with vasomotor rhinitis had significant abnormalities of their sudomotor, cardiovagal, and adrenergic subscores. Their composite autonomic scale score was significantly impaired at 2.43, as compared with 0.11 for controls (P < .005). Conclusion Autonomic nervous system dysfunction is significant in patients with vasomotor rhinitis. Possible factors that trigger this dysfunction including nasal trauma and extraesophageal manifestations of gastroesophageal reflux are discussed. [source]

A critique of the World Health Organisation's evaluation of health system performance

HEALTH ECONOMICS, Issue 5 2003
Jeff Richardson
Abstract The World Health Organisation's (WHO) approach to the measurement of health system efficiency is briefly described. Four arguments are then presented. First, equity of finance should not be a criterion for the evaluation of a health system and, more generally, the same objectives and importance weights should not be imposed upon all countries. Secondly, the numerical value of the importance weights do not reflect their true importance in the country rankings. Thirdly, the model for combining the different objectives into a single index of system performance is problematical and alternative models are shown to alter system rankings. The WHO statistical analysis is replicated and used to support the fourth argument which is that, contrary to the author's assertion, their methods cannot separate true inefficiency from random error. The procedure is also subject to omitted variable bias. The econometric model for all countries has very poor predictive power for the subset of OECD countries and it is outperformed by two simpler algorithms. Country rankings based upon the model are correspondingly unreliable. It is concluded that, despite these problems, the study is a landmark in the evolution of system evaluation, but one which requires significant revision. Copyright © 2002 John Wiley & Sons, Ltd. [source]

Desktop video conferencing in virtual workgroups: anticipation, system evaluation and performance

INFORMATION SYSTEMS JOURNAL, Issue 3 2001
Anthony M. Townsend
Abstract. This study investigates the applicability of the technology acceptance model (TAM) to the process of adoption of desktop video conferencing (DTVC). In this study, we create virtual office environments using DTVC and then examine how our participants interact with each other using the DTVC medium. Specifically, we examine the effect of users' anticipated system utility on actual system satisfaction, and in turn, system satisfaction on their workgroup performance. As in other applications of the TAM model, we find that those participants that anticipated DTVC in a positive manner were more likely to evaluate it positively after using it and were more likely to perform well during their use of the system. [source]

A simulation model for design and evaluation of micro-irrigation systems

IRRIGATION AND DRAINAGE, Issue 4 2001
C.M.G. Pedras
goutteurs; micro-aspersion; modèle AVALOC; analyse des performances Abstract The rational use and conservation of water resources require that irrigation performance, including emission uniformity, be as high as possible. Simulation models can help achieve these objectives. The AVALOC model has been developed for design and performance analysis of microirrigation systems, adopting the sector as the unit for analysis. The model works with the Windows operating system and is explored interactively through a simple dialogue structure consisting of a sequence of user-friendly interfaces. Model computations are supported by a database containing updated information on the emitters and pipes available on the market, and where the information relative to the sectors being designed or evaluated is stored. The databases allow easy introduction, visualization and correction of data through a user-friendly menu. In the design mode, the model provides for the selection of pipes and emitters that permit the attainment of the target performance, including emitter discharge uniformity. In the performance analysis mode, a hydraulics simulation is executed and several system performance parameters are then computed. The simulation can be performed using data created during design or data collected from field system evaluation. The present paper describes the main features of the model and shows a design example applied to an olive orchard. Copyright © 2001 John Wiley & Sons, Ltd. L'utilisation rationnelle des ressources en eau et la conservation des ressources naturelles requiert que les performances des systèmes d'irrigation soient les plus hautes que possible. L'utilisation des modèles de simulation pour le projet et l'évaluation des systèmes de microirrigation peut aider à atteindre un tel objectif. Ainsi, le modèle AVALOC a été développé pour le projet de ces systèmes et aussi pour leur analyse de performance. Le modèle utilise le language Visual Basic pour le système opératif Windows et il est exploré à travers d'un ensemble d'interfaces de dialogue avec l'utilisateur. L'unité d'analyse est le secteur d'irrigation. Les calculs font appel à une base de données contenant de l'information actualisée sur les caractéristiques des émisseurs , gouteurs et microasperseurs , et des conduites disponibles sur le marché et où l'on emmagasine l'information relative aux secteurs en cours de projet ou d'évaluation. Les bases de données sont accedées par une interface de dialogue qui permet l'introduction, visualisation ou correction des données. Le mode de projet permet la selection des emisseurs et tuyaux qui donnent satisfaction aux objectfs de performance fixés à priori. La simulation du fonctionnement hydraulique du secteur en projet permet le calcul de plusieurs indicateurs de performance et, donc, de vérifier si la solution considérée doit être retenue ou modifiée, le modèle étant utilisé de façon interactive. Le mode de simulation hydraulique est aussi utilisé avec des données de terrain pour évaluer la performance des systèmes en operation. Cet article décrit les caractéristiques principales du modèle en même temps qu'on présente un exemple d'application à un système de goutte à goutte pour un olivier. Copyright © 2001 John Wiley & Sons, Ltd. [source]