the aim of this paper is to introduce a new approach for obtaining the numerical solution of singulary perturbed boundary value problems based on an optimal control technique. in the proposed method, first the mentioned equations are converted to an optimal control problem. then, control and state variables are approximated by chebychev series. therefore, the optimal control problem is reduced ...

identification of a real time of a change in a process, when an out-of-control signal is present is significant. this may reduce costs of defective products as well as the time of exploring and fixing the cause of defects. another popular topic in the statistical process control (spc) is profile monitoring, where knowing the distribution of one or more quality characteristics may not be appropr...

aim: health locus of control includes the degree of a person's belief in the fact that his/her health is controlled by internal or external factors. the aim of this study was to determine the status of health locus of control and its related factors among iranian pilgrims.methods: this cross-sectional study was performed on 600 pilgrims of the holy shrines in tehran in 2015. people aged ov...

multileaf collimator (mlc) is among the radiation field shaping systems used for conformal radiotherapy and intensity modulation radiation therapy techniques. the mlc system that has been designed and fabricated in this study includes 52 leaves, 52 stepper motors, 2 dc motors, 16 programmable logic controllers (plcs) and one human machine interface (hmi). this system can be mounted on conventio...

introduction: postural control is regarded to as a critical element in physical activities and as an important factor in performing athletic skills. previous studies have reported controversial results about the effects of different training programs and also of detraining on the postural control. this study aimed to evaluate the effect of two-, four-, and six-week detraining after a period of ...

as a unique family based community infrastructure and social institutions play an important role in maintaining the health of individuals and society. among the factors that contributed to the survival of the family, sexual health and function properly within the family and on the basis of religion, the law and common law. the aim of this study was to evaluate sexual dysfunction among psychiatr...

objective of this study was determining of the hamadanian young couples about family size, sex ratio and birth order of their asked children. the population of this study was the young men and women that were imminent of marriage, refereed to marriage offices as well as hygienic and therapeutic centres in hamadan city. this was a cross sectional descriptive study and has been done by using ques...

this descriptive cross sectional census study identified the perceptions of extension and outreach employees of iowa state university in the united states about job autonomy and control after two years of a major restructuring. employees perceived autonomy and control over expressing views and ideas about their work and spending time on the job but perceived little influence over budget allocat...

background burn is a tragedy that follows multiple problems in a patient including pain, anxiety and lack of confidence into medical team. this study evaluated the effect of shiatsu massage on pain intensity of burn patients. methods a total of 120 burn patients from motahhari burn hospital and of both genders were randomly divided into 4 groups of undergoing hand massage, leg massage, both han...

locus of control is a very important issue in the psychological science and it can help people to overcome many psychological disorders. the main assumption of the present study was the relationship between both internal and external locus of control, as a hypothetical variable. the aim of this study was to determine the relationship between locus of control and levels of anxiety in female stud...