Introduction: Regular physical activity as an important health promoting behavior can prevent or delay the development of chronic diseases. The purpose of the present study was to determine the factors related to exercising based on the “Theory of Planned Behavior “in boys in in Ijrod City of Zanjan. Methods: The present study is descriptive-correlational. In this research, a sample of 185 boy...

the purpose of this study is identifying effective factors which make customers shop online in iran and investigating the importance of discovered factors in online customers’ decision. in the identifying phase, to discover the factors affecting online shopping behavior of customers in iran, the derived reference model summarizing antecedents of online shopping proposed by change et al. was us...

the effect of the presence of perforations on he stresses of a plate is a problem which is of great interest in structural design and in the mathemattical theory of elasticity. among the many hole patterns that are likely to require consideration is the ring of equally spaced circular holes. the present worke investigates stress & strain analysis of a thin isotropic circular plate containing a ...

Abstract Background: Colorectal cancer is one of the most common cancers worldwide. It is the third common cancer and the second leading cause of death from cancers in the developed countries. First degree relatives of colorectal cancer patient have a 2-3 fold higher risk to develop disease. Planning for Prevention from disease at this group needs to review their current needs and assess the...

  Background: Since the self -medication it can make an important problem for the individual and society. Especially in young children due to the fact that the development were double importance , the aim of this study was to measure the theoretical constructs theory of planned behavior model in behavior has been investigated.   Methods: This is an analytical and cross-sectional study that was ...

 Background and aim: Annually, occupational accidents have a major impact on workers health and Impose large costs on employers. The current study was designed to evaluate the efficacy of the theory of planned behavior-based intervention to improve workers safety climate in industrial city of Qazvin in the first half of 2010.   Methods : A number of 75 workers in each of the control and interve...

in this thesis our aim is to construct vector field in r3 for which the corresponding one-dimensional maps have certain discontinuities. two kinds of vector fields are considered, the first the lorenz vector field, and the second originally introced here. the latter have chaotic behavior and motivate a class of one-parameter families of maps which have positive lyapunov exponents for an open in...