A single server commences its service at time zero every day. random number of customers decide when to arrive the system so as minimize waiting and tardiness costs. The costs are proportional with rates $$\alpha $$ $$\beta , respectively. Each customer’s optimal arrival depends on others’ decisions; thus, resulting strategy is a Nash equilibrium. This work considers estimation ratio $$\display...

The power of an adaptive equalizer is maximized when the structural parameters including the tap-length and decision delay can be optimally chosen. Although the method for adjusting either the tap-length or decision delay has been proposed, adjusting both simultaneously becomes much more involved as they interact with each other. In this paper, this problem is solved by putting a linear prewhit...

lack of forest management plan and forest road network caused that the traditional tree felling and processing was developed in hyrcanian forest. in this system, trees are felled, limbed and topped motor-manually. felled trees are processed with chainsaws into lumber and/or pulpwood. in order to evaluate this system, lumber processing was studied in two compartments of namkhaneh district in khe...

introduction: the important of comparing performance of hospitals using hospital indicators, has been made the necessary of utilizing of the application model inevitable. this study aimed to compare hospital performance key indicators simultaneity. methods: in this descriptive cross sectional and retrospective study, 31 hospitals of isfahan university of medical sciences were evaluated in 2007....

objectives the purpose of this study was to determine the types of fall-related injuries and the related risk factors in the elderly population of qom province, iran. patients and methods this retrospective study was performed on 424 elderly people (65 years and over) referred to shahid beheshti hospital, qom, iran, due to falls between 2010 and 2012. the icd-10 codes of external causes of inju...

background: urinary tract infections (utis) are one of the most important bacterial infections among children throughout the world. the study aimed to estimate the cost of hospitalization associated with pediatric utis in kermanshah province for the years of 2013 and 2014. methods and materials: this was a cross sectional and descriptive study. the study subjects included all those aged 20 year...

this research was done to study the effect of swing date, temperature, and sunshine hours on the yield and yield components of soybean in aliabad katool area (golestan provience), iran in 2012 year. in order to this purpose different soybean fields with different swing date had been remarked in vast area of soybean fields of katool aliabad area. entirely, in this study 30 soybean fields of kato...