نتایج جستجو برای: Protective device
تعداد نتایج: 788881 فیلتر نتایج به سال:
background and purpose: many workers are exposed to workplace hazards. many occupational diseases are preventable by personal protective devices (ppds). though many workers do not use ppds or their protection by ppds is not sufficient. this study was designed to assess the quality of ppds usage among industrial workers. materials and methods: in a cross-sectional study, 648 workers from four ma...
in this paper, simultaneous placement of distributed generation, capacitor bank and protective devices are utilized to improve the efficiency of the distribution network. the objectives of the problem are reduction of active and reactive power losses, improvement of voltage profile and reliability indices and increasing distribution companies’ profit. the combination of firefly algorithm, parti...
Background and Aim: The purpose of this study was to design of dual-purpose treadmill and gait simulator device for veterans and disabled people. This device can be used by both healthy and stroke patients, spinal cord injury, Parkinson's disease, MS and people who have lost their ability to walk for a temporary period. Methods: The device design is such that the protective waistcoat has sensor...
Introduction: Occupational hearing loss due to noise is completely preventable and using the hearing protection device is one of control proceedings by the workers expose the impermissible noise. Therefore, this study aimed to determine the effective factors on occupational hearing loss and also the effective factors on using hearing protective devices by the workers exposed to excessive noise....
In this paper, we proposed a new structural protective device based on a silicon controlled rectifier (SCR) to protect ESD (Electrostatic Discharge) of an integrated circuit. The proposed device features latch-up immunity in a normal operation state by the low holding voltage of the existing SCR based PSD protective device. The proposed device was analyzed to figure out electrical characteristi...
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