mining and metallurgical projects are among those that require the most sizeable invest-ments undertaken in iran. one target of the current development plan and the ministry of mines and industries has been to attract foreign investment in mining projects. a survey of world-class mining companies was conducted to determine their expectations and in order to recommend a frame work for iran aimed...

Since the enactment of the Americans with Disabilities Act in 1991 operating expenses for Demand Responsive Transit have more than doubled as demand for this mandated service has expanded. Many advanced technologies and management practices have been proposed and implemented to improve the efficiency of the service; but, evidence for the effectiveness of these actions has been based upon projec...

Background: Nurses’ working environments, especially operating rooms are stressful environments due to their undesirable factors and conditions. The present study was conducted to determine sources of occupational stress among operating room nurses of hospitals affiliated to universities of medical sciences in Kerman, Iran. Materials and Methods: This cross-sectional study was carried ou...

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Biomass particle size impacts handling, storage, conversion, and dust control systems. Switchgrass (Panicum virgatum L.) particle size distributions created by a knife mill were determined for integral classifying screen sizes from 12.7 to 50.8 mm, operating speeds from 250 to 500 rpm, and mass input rates from 2 to 11 kg/min. Particle distributions were classified with standardized sieves for ...

Room and Beyond To the Editor: Zacharias and colleagues1 report improved survival with radial artery conduits versus vein graft in coronary artery bypass graft (CABG) surgery with left internal mammary artery to left anterior descending artery, as well as better radial patency. This study reinforces previous findings demonstrating superior patency of arterial conduits over vein grafts. Nonethel...

BACKGROUND Surgical-site infections due to intraoperative contamination are chiefly ascribable to airborne particles carrying microorganisms. The purpose of this study is to identify the actions that increase the number of airborne particles in the operating room. METHODS Two surgeons and two surgical nurses performed three patterns of physical movements to mimic intraoperative actions, such ...

BACKGROUND The objective of this study was to determine the factors associated with sun exposure behaviors among Operating Engineers (heavy equipment operators). METHODS Operating Engineers (N = 498) were asked to complete a cross-sectional survey. Linear and logistic regression analyses were used to determine health behavioral, perceptional, and demographic factors associated with sun exposu...

BACKGROUND The operating room (OR) of the hospital is a special unit that requires a relatively clean environment. The microbial concentration of an indoor OR extrinsically influences surgical site infection rates. The aim of this study was to use active sampling methods to assess microbial colony counts in working ORs and to determine the factors affecting air contamination in a tertiary refer...