in this thesis, a better reaction conditions for the synthesis of spirobarbiturates catalyzed by task-specific ionic liquid (2-hydroxy-n-(2-hydroxyethyl)-n,n-dimethylethanaminium formate), calcium hypochlorite ca(ocl)2 or n-bromosuccinimide (nbs) in the presence of water at room temperature by ultrasonic technique is provided. the design and synthesis of spirocycles is a challenging task becaus...

the purpose of this study was to investigate the relationship between teachers’ class management practices with students’ self- regulated learning and academic self-efficacy. in this study relating to the management class, three dimensions, (training management, people management and behavior management) and three style (interventionist, interactionist and non-interventionist) was considered. r...

power transformers are important equipments in power systems. thus there is a large number of researches devoted of power transformers. however, there is still a demand for future investigations, especially in the field of diagnosis of transformer failures. in order to fulfill the demand, the first part reports a study case in which four main types of failures on the active part are investigate...

Researchers have already highlighted the safety and health issues in workplaces. The necessity of these issues and their close relations to the environment have more transparently called for the management control of three critical dimensions of Health, Safety, and the Environment (HSE). Furthermore, following the rapid development of technology and the complexity of the activities tailored to ...

Background/aim: Health, safety, and environmental status of the parks are important issues that must be addressed before accidents and the resulted complications. Given the importance of safety for people, especially children in parks and, on the other hand, regarding the traditional approach for managing urban parks in Iran, which focuses on the problems after a crisis and the associated signi...