In statistics, the Pearson correlation coefficient rx,y determines the degree of linear correlation between two variables and it is known that −1 ≤ rx,y ≤ 1. In the theory of networks, a curious expression proposed in [PRL 89 208701 (2002)] for degree-degree correlation coefficient rji,ki , i ∈ [1,M ] has been in use. We realize that the suggested form is the conventional Pearson’s coefficient ...

This paper introduces a causation coefficient which is defined in terms of probabilistic causal models. This coefficient is suggested as the natural causal analogue of the Pearson correlation coefficient and permits comparing causation and correlation to each other in a simple, yet rigorous manner. Together, these coefficients provide a natural way to classify the possible correlation/causation...

In this paper we present a method of abrupt cut detection with a novel logic of frames’ comparison. Actual frame is compared with its motion estimated prediction instead of comparison with successive frame. Four different similarity metrics were employed to estimate the resemblance of compared frames. Obtained results were evaluated by standard used measures of test accuracy and compared with e...

background: occupational stress occurs when job needs do not comply with the abilities, support, and needs of the employee. in addition to negatively affecting the physical and mental health of individuals, occupational stress can reduce their efficiency and productivity in organizations. this paper investigated the rate of job stress and its relation to absenteeism in workers. methods: in this...

planned human resource development is critical to educating a skilled and efficient workforce. the present study aimed at identifying the main factors of planned human resource development in iranian social security organization hospitals. the study is done through analysis of a questionnaire designed after identification of the main variables. iran social security organisation hospitals (the m...