preventive maintenance scheduling of generating units is addressed as a long-term scheduling in power system studies aiming to increase the reliability incorporating cost reduction. it consists of knowing which generating units should be shut down for regular safety inspection. in this paper, a new formulation of preventive maintenance scheduling associated with cost reduction index (cri) is pr...

this paper presents the steady state behavior and maintenance planning of the bleaching system in a paper plant. the paper plant comprises of various systems including feeding, chipping, digesting, washing, bleaching, screening, stock preparation and paper making, etc. one of the most important functionaries of a paper plant, on which quality of paper depends, is the bleaching system, where rem...

the ministry of health, treatment and medical education of iran has recently announced an estimated figure of 200,000 injecting drug users (idus). the aim of this study was to pilot a national program using demographics, types of drug abuse and prevalence of blood-borne infections among idus.in order to elicit data on demographics, types of drug abuse and prevalence of blood-borne infections am...

age replacement policy is concerned with finding an optional time tominimize the cost, at which time the unit is replaced even if itdoes not fail. so far, age replacement policy involving random agehas been proposed. this paper will assume the age of the unit is anuncertain variable, and find the optimal time to replace the unit.

background and aims: sexual dysfunction is a common complaint among drug abusers in the treatment with methadone and buprenorphine. the aim of this study was to assess sexual dysfunction in patients undergoing methadone or buprenorphine for maintenance therapy. methods: this research was a cross-sectional study. a 3-parts questionnaire (demographic questions, international index of erectile fun...

background: one of the major challenges in current methadone maintenance treatment retention rates in the treatment and prevention of relapse addiction. the aim of this study was determine the factors influencing relapse based on health belief model. methods: a cross-sectional study was conducted among 384 patients on methadone maintenance treatment referred to addiction clinic in hamadan, whic...

objective : the study evaluated the efficacy and safety of vaginal rogesterone on prevention of recurrent preterm labor. materials and methods: total number of 70 patients with preterm labor treated with intravenous magnesium sulfate in perinatology department of valiasr hospital entered to a randomized clinical trial. treatment group after inhibition of preterm labor with magnesium sulfate rec...