نتایج جستجو برای: and equipment
تعداد نتایج: 16833598 فیلتر نتایج به سال:
abstract: mineral scaling in oil and gas production equipment is one of the most important problem that occurs while water injection and it has been recognized to be a major operational problem. the incompatibility between injected and formation waters may result in inorganic scale precipitation in the equipment and reservoir and then reduction of oil production rate and water injection rate. ...
nowadays,tourism industry considered as one of the main sources of income of a country.unfortunately and despite of owning plenty of cultural historical and natural attractions, iran has not reached to a proper position in this field. besides, the historical cities of a country are considered as the income resource and national wealth of it. qazvin with a rich cultural precedent, have suitable ...
the prevalence of atrial fibrillation (af) is 1-2 % in the general population, and the risk of embolic stroke in af patients is 4-5 times higher than that in the general population. af-related strokes are often severe, and the rate of permanent disability is much higher among individuals who have af-related strokes than in those who have strokes unrelated to af. in patients with af, more than 9...
background paracentesis is a common bedside therapeutic and diagnostic procedure that requires insertion of a catheter into the peritoneal cavity; however, lack of a specialized fixator for securing the catheter causes frequent catheter kinking and patient discomfort. objectives this study aimed to demonstrate the efficacy of a designed paracentesis fixator in reducing patient discomfort and pr...
chromate conversion coating is applied on aluminum 6061. the optimum conditions for chromate bath composition and immersion time are also obtained for standard requirements provision such as corrosion resistance in salt spray test, electrical resistance and coating quality. the applied coatings are electrochemically tested in sea and distilled water. according to tafel and cyclic polarization c...
conclusions the designed safe irrigator syringe seems to be applicable in wound irrigation and superior to the conventional devices regarding efficacy and user comfort. results all of the interns stated that the new device is quite applicable for wound washing and is easy to handle. nine interns believed that safe irrigator syringe is superior to the conventional devices regarding efficacy and ...
regardless of the clinical setting, a good back-up represents one of the most important conditions to ensure guide wire and balloon advancement and stent delivery. as a “mother and child” system, the guideliner catheter (vascular solutions inc., minneapolis, mn, usa) provides an extension to the guide catheter with better coaxial alignment and stability. we report two didactic cases showing the...
introduction: nowadays, medical equipment is essential to provide health care services in hospitals. since 20% of the hospitals costs are devoted to providing such equipment, an appropriate management is required to maintain it. in this study it is intended to investigate the maintenance management of medical equipment in hospitals. methods and materials: it is a cross-sectional study. the popu...
background identification of common technical errors during preparation of panoramic radiographs, how affect the quality and interpretation of the radiographs and the techniques used to deal with such errors, might help prevent unnecessary radiation to patients and save their time and money. objectives the current study aimed to identify common errors in the panoramic radiographs taken by post-...
a few years after the implementation of computerize maintenance management systems (cmms), showing the analysis results of the collected data in these systems is necessary and important for continuing the usage of these systems. equipment downtime and cost data can identify patterns of equipment faults and equipment costs. it can also show deficiencies in the implementation of maintenance syste...
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