Availability and reliability of a manufacturing system are the most common indicators in the reliability engineering area to assess the quality and on-time deliveries of the products they produce. The purpose of this paper is to analyze the availability, reliability. failure metrics such as MTBF and MTTF, and also steady-state availability of a cooking oilproduction line using a Markov approach...

Earth pressure balance tunnel boring machines (EPB-TBMs) are favorably applied in urban tunneling projects. Despite their numerous advantages, considerable delays and high maintenance cost are the main disadvantages these machines suffer from. Reliability, availability, and maintainability (RAM) analysis is a practical technique that uses failure and repair dataset obtained over a reasonable ti...

Introduction: In recent decades, medical education has been following new approaches to early clinical exposure. This study was designed to determine early clinical exposure (ECE) objectives and their availability and importance from the participants’ viewpoint. Methods: In a descriptive study, 70 students who had participated in ECE at Isfahan Medical University were asked to complete a quest...

what happened in recent decades in collapse of several states and birth of new ones, raised serious questions about the legal aspects of the problem. does international community actually endorse the unilateral secession to create new states? what could be the real impacts of recent cases like kosovo and ossetia on the future of international legal order? the present article tries to find these...

Considering generalized concurrence as the criterion of entanglement, we study entanglement properties of superposition of two qutrit coherent states, as a function of their amplitudes. These states may attain maximum entanglement or no entanglement at all, depending on the choice of the parameters involved. The states revealing maximum entanglement also display the maximum violations of the Be...

with the aim of recognizing the steric effects on the silylenic r2c6h6si structures, dft calculationsare carried out on 8 structures of r2c6h6si (where r is hydrogen (h), methyl (me), isopropyl (i-pro),and tert-butyl (tert-bu)). these species are at either triplet (t) or singlet (s) states. singlet–tripletenergy separations ( me (20.32) > t-bu (15.92).all singlet states of r2c6h6si, are more st...

To meet the challenge of dramatically market, manufacturing process requires the high production efficiency and the stability of the machining accuracy. Thus availability is the one of crucial measurements of complex equipments. This study addresses the problem of evaluating the performance of equipment which subject to both wear-out failures and random failures. Moreover, the different degrada...