introduction:today, shift work is considered as a necessity in many jobs and for some 24-hour services the use of shift-work is growing. however, shift work can lead to physiological and psycho-social problems for shift workers. this study aimed to determine the effects of shift work on the associated health problems, together with the demographic and job characteristics underlying the problems...

background:   by the development of e-learning in the world and also in iran, tabriz university of medical science has been implementing and expanding e-learning. the investigation of its problems from the academic staffs’ viewpoints, and proposing solutions in order to solve or eliminate the problem effects add to its advantages and provide sustainable basis according to the necessity of chang...

To assess time, staff, problems and costs involved in clinical electrophysiologic studies for documented or suspected tachycardia, 33 consecutive cases were analyzed prospectively. At least seven staff members were used for each study. Insertion of catheters required 24-105 minutes (mean 63 ± 20 minutes). Programmed stimulation required 12-210 minutes (mean 87 ± 38 minutes). Total fluoroscopy t...

the allocation of human resources to project activities in order to schedule them is one of the closest states to the actual conditions of scheduling problems. but regarding the fact that this problem belongs to the class of np-hard problems; so far the exact methods have only been able to solve the small size problems. in this study, the renewable resources are humans in a way that every staff...