one of the generalizations of the wiener number to weighted graphs is to assign probabilities to edges, meaning that in nonstatic conditions the edge is present only with some probability. the reliability wiener number is defined as the sum of reliabilities among pairs of vertices, where the reliability of a pair is the reliability of the most reliable path. closed expressions are derived for t...

human factors are among the main elements affecting the reliability of nondestructive examinations (nde). in a man-machine system, human reliability is affected by many factors (performance shaping factors) whose influence on reliability cannot be easily expressed quantitatively. this paper identifies and ranks 59 perform-ance shaping factors by using a fuzzy reasoning method and proposes a pro...

Reliability and validity are crucial issues in research. Reliability is concerned with lowered quality of data due to random errors in measurement. Validity is concerned with whether variables measure what they purport to measure or are biased by other systemic factors, excluding random errors. Strength of correlation is limited by reliability. Given the problems in measuring reliability and va...

background fear of falling (fof) is highly common in people with parkinson disease (pd). fear of frequent falling arises from risk factors in pd. objectives one of the most common tools used to measure fof in patients with pd is the survey of activities and fear of falling in the elderly (saffe), but no studies have been conducted on its reliability and validity in iran. the current study attem...

background: dysphagia as a common condition affecting many aspects of the patient’s life. the dysphagia handicap index (dhi) is a reliable self-reported questionnaire developed specifically to measure the impact of dysphagia on the patient’s quality of life. the aim of this study was to translate the questionnaire to persian and to measure its validity and reliability in patients with neurogeni...