background: the present research is a descriptive study, conducted in fall 2002, tabriz, iran, in order to inquire the prevalence rate of sleeplessness complications after the night-working hours in nurses. as a data collection method, a questionnaire comprising 25 personal and general questions on sleeplessness complications was designed and administrated based on likert measurement of all or ...

abstract recharge of aquifers by using wastewater, is one of the important and applicable ways for reusing this valuable water resource, especially in arid and semi-arid regions. as the necessity of local practices for finding the proper management strategies and optimum use of recharge systems (conforming to climate, soil, etc.), a preliminary study was carried out. three physical models were ...

Overtime pays and work agreements between workers outsourcing companies are often not enforceable. This study aims to determine the form of legal protection for overtime wages in their remedies. research is normative juridical, especially on systematics level synchronization. The results showed that there must be orders worker approvals. given after working more than 40 hours/week, a maximum 4 ...

Background: Occupational noise-induced hearing loss (ONIHL) is a hearing disorder that affects workers all over the world. Preconditioning with several mild or less potent stressors will effectively prevent the development of noise-induced hearing loss. This study investigated the possible preventive effects of normobaric hyperoxia preconditioning on preventing the noise-induced hearing impairm...

BACKGROUND In Japan, some residents develop mental health problems. In previous studies, it was reported that long working hours might be a cause of stress reaction such as depression. There were some reports that compared residents with 80 or more working hours with those with less than 80 working hours. However, many residents are practically detained for extra-long time, designated as 100 h ...