background: personal protection equipments (ppes) should be easily accessible to decrease contact with infecting factors and also should be used purposefully to effectively keep the health care personnel in a safe distance from the patient blood and body fluid which can easily infect the operating rooms personnel. this study aimed to find the operating rooms' personnel compliance with standards...

This paper proposes a one-terminal traveling wave (TW)-based transmission line earth fault distance protection function. It only needs the detection of first incident modal fault-induced TWs, so that, challenging wavefronts reflected from point is not required. Both sampling frequency effect and inaccuracies on propagation velocity are considered in order to define zone. Simulated records were ...

background and aims. the aim of this study was to evaluate x-ray protection methods in dental offices in tabriz. materials and methods. in this study 142 dental offices were evaluated. a questionnaire-based method was used. the data was analyzed by descriptive methods. results. the least commonly used methods were leaded walls (4.9%) and film badges (16.9%) and the most commonly used methods we...

BACKGROUND: Distance protections are widely used in protection of energy transmission lines, but their time coordination is still an important and difficult problem. Inappropriate configuration leads to a hazard event: remote circuit breaker tripping provided the local circuit breaker can be opened, which severely impairs power system operation. OBJECTIVE: To describe a method and provide softw...

In the territory of western part Croatian electrical power system (EPS) lines 110 kV transmission network have been reconstructed for purpose improvement safety and drive quality. The particularity observed EPS is that its environment includes only one powerful supply source. Those are two thermal plants on same location, Plomin 1 with voltage level kVand 2 220 kV. fault which occurred in charg...