background: radon and its short-lived decay products are considered as the important sources of public exposure to natural radioactivity. the synergistic interaction between tobacco smoking and radon is known to be an actual problem. this study has provided a mathematical description and prognosis of the carcinogenic effects after combined action of radon with smoking. materials and methods: a ...

This chapter addresses the design of a robot eye featuring the mechanics and motion characteristics of a human one. In particular the goal is to provide guidelines for the implementation of a tendon driven robot capable to emulate saccadic motions. In the first part of this chapter the physiological and mechanical characteristics of the eyeplant1 in humans and primates will be reviewed. Then, t...

In order to study the vestibular system in different organs of movement as well as their collaboration between working mechanism, this paper designs a model of the common object request broker architecture (CORBA) for the head and eye movement system based on the vestibular function. By analyzing physiological characteristics of the head and eye movement model, and further introducing the struc...

background: treatment of ionizing radiation combined with chemical agents can enhance the inactivation of cells. the aim of this study was to determine the parameters involved in the inhibition of cell recovery. materials and methods: a mathematical model describing the process of recovery as a decrease in the effective radiation dose was used. the model includes two parameters, recovery consta...

the objective of this article is to analyze the data collected by the depart­ment of environmental health about the susceptibility of anopheles stephensi in the minab shahrestan to d.d.t. from 1957 to 1968, in order to: determine a mathematical model for the changes in l.d.50 by time and estimate the trend of l.d.50, for the future years. by plotting the changes in the resistance of the mosquit...

occurrence of chaotic behaviors because of fluctuations creation and their intensified transfer along the chain is one of the main causes of inefficiency of material requirements planning (mrp) based supply chains. one of the reasons of the inefficiency is the lumpiness phenomenon. through this phenomenon, some parts have an irregular production schedule, with nothing produced in some periods a...

While convergent, the human orbit differs from that of non-human apes in that its lateral orbital margin is significantly more rearward. This rearward position does not obstruct the additional visual field gained through eye motion. This additional visual field is therefore considered to be wider in humans than in non-human apes. A mathematical model was designed to quantify this difference. Th...