the principal effects of mass degradation on polymer matrix composites (pmcs) are the decay of mechanical properties such as strength, elongation, and resilience. this degradation is a common problem of the pmcs under thermal cycling conditions. in this article, composite degradation was investigated by measurement of total mass loss (tml) using the taguchi approach. thermal cycling tests were ...

environmental noise pollution is among the most urban problems which can be caused due to real sources like traffic, train and virtual sources provided by rigid surfaces. one of the urban structures in which can perform as a virtual noise source are the installed gutters alongside highways. these structures are mostly used to pass the wastewater or the rainfall. in this research, the acoustical...

Results: The Scale consisted of 38 items to be graded by 5 point Likert type. The result of the analysis provided four factors structure for the scale. (1. satisfaction – self-confidence, 2. clinical competency – self-efficacy, 3. seriousness fidelity, 4. barriers – difficulties). Corrected item-total correlation values of the scale items varied between 0.59-0.76. The reliability coefficient wa...

This study aimed to update and re-validate the scoring system of Fahmy and El-Sherbini for measurement of socioeconomic status in health research in Egypt. The new socioeconomic status scale has 7 domains with a total score of 84. Intra-and inter-observer variability and the internal consistency of the scale were assessed. A linear regression model was performed to determine the relative import...

(i) The number of cases, n, on which the regression is based. (ii) The total number of variables, dependent and independent, in the regression, ðkþ 1Þ. (iii) The number of independent variables in the regression, k. (iv) The means of all kþ 1 variables in the regression, both the independent variables ðx1; x2; . . . ; xkÞ and the dependent variable ðyÞ, which is the ðkþ 1Þth variable: i.e., x1;...