introduction: nowadays and with the increasing role of the worldwide web as one of the most important sources of information on the one hand, and the enhancement of its usability on the other, it is necessary for the web designers and developers to be familiar with the criteria that make a web portal usable. therefore, the present study aimed to provide knowledge about the criteria of usability...

[no abstract available]

ion is the elimination of system components that are nonessential to the model and selection of those components that enable the model to best convey the intent of its designer. In computational modeling, the abstraction process may also be called reduction, variable elimination, or feature selection. For example, a patient may be associated with hundreds of variables but usually only a small p...

1: Percept Mot Skills 2001 Jun;92 (3 Pt 1):673-4 Geophysical variables and behavior: CIV. Power-frequency magnetic field transients (5 microtesla) and reports of haunt experiences within an electronically dense house. Persinger MA, Koren SA, O'Connor RP. Department of Psychology, Laurentian University, Sudbury, Ontario, Canada. Magnetic field measurements for power frequencies were measured con...