The wind industry has had a chronic problem with the reliability of its gearboxes [1], [2]. Experience has shown that premature gearbox failure is a leading maintenance cost driver that can easily consume the profit margin from a wind turbine operation. Condition monitoring is already understood to have potential to mitigate this risk by managing gearbox maintenance through the promises of reli...

In this paper, reconfiguration problem of distribution network has been investigated toimprove reliability and reduce power loss by placement of renewable energy sources; i.e. solarcell and wind turbine. For this, four reliability indices are considered in objective function;which are as follows: System Average Interruption Frequency Index (SAIFI), System AverageInterruption Duration Index (SAI...

The disease is caused by a mycoplasma known as Mycoplasma gallisepticum (MG).The strains of MG may differ markedly in virulence, that is, in the degree of their disease-producing power. Some strains of MG are mild while others are highly virulent (very harmful). Mycoplasma is similar to bacteria, but lacks a cell wall. Lack of wall makes MG extremely fragile. They are easily killed by disinfect...

background: needle stick accidents  are a serious health  risk  for blood-borne infections among health-care workers(hcws). objective: to determine the frequency of needle stick injuries (nsis)  among hcws. material & methods: a cross-sectional study was conducted in  behesti hospital  of kashan from september 2012 to march 2013. data were collected using  a questionnaire. result: needle stick ...

Introduction: Occupational nature, strenuous physical activity, shift work, spatial and geographical location, as well as support facilities and equipment, pose greater risks to individuals in the oil and gas industry, especially those engaged in offshore oil exploration and production activities. The purpose of this article is to explain the issue of health and well-being of oil and gas indust...