The COVID-19 pandemic altered activities of societies, forced closures at the national level in several countries, populations had to isolate themselves home. Different studies have been initiated that allow us understand changes behaviors related physical activity and sedentary lifestyle populations. objective this work was analysis importance times. A systematic review carried out a questionn...

Background Physical activity in students in addition to positively affecting their different health aspects is also effective in academic progress and reducing absence from school. Physical activity in students is affected by several factors. The aim of this systematic ...

The problem of determining the moment of the project completion time (MPCT) with stochastic activity durations is addressed. In the direct approach the MPCT is obtained after analyzing all possible network paths which is NP-hard problem. A recursive method for determining MPCT by proceeding iteratively over the nodes is the computationally least demanding and therefore the most efficient approa...

Project planning is part of project management, which is relates to the use of schedules such as Gantt charts to plan and subsequently report progress within the project environment. Initially, the project scope is defined and the appropriate methods for completing the project are determined. In this paper a new approach for the critical path analyzing a project network with random fuzzy activi...

a completely randomized design (crd) with three replications was conducted at greenhouse of urmia university in 2013 to study the effect of different methyl jasmonate concentrations (0, 0.1 and 0.5 mm) on the activity of enzymes polyphenol oxidase, phenylalanine ammonia lyase, catalase, ascorbate peroxidase, guaiacol peroxidase and total protein content in basil. activity of the enzymes and tot...