To properly define countermeasures to improve traffic safety it is necessary to determine the specific causes and circumstances of accidents. In this sense, the current practice, developed a series of tools for the analysis of accidents that can accurately point to the problem. In-depth analysis of accidents or as they are called independent assessment of traffic accidents is one of the modern ...

We consider the fixed-cycle traffic-light (FCTL) queue, where vehicles arrive at an intersection controlled by a traffic light and form a queue. The traffic light signal alternates between green and red periods, and delayed vehicles are assumed to depart during the green period at equal time intervals. Most of the research done on the FCTL queue assumes that the vehicles arrive at the intersect...

The use of IP traffic prediction techniques for DAMA TDMA protocols is investigated in this paper. The predicted traffic distribution is derived when the input traffic shows long-range dependence features. Furthermore, an equivalent bandwidth is calculated, which allows the wireless terminal to request a certain amount of bandwidth (slot duration) in terms of a target traffic loss probability. ...

In times of Internet access being a popular consumer application even for "normal" residential users, some telephone exchanges are congested by customers using modem or ISDN dial-up connections to their Internet Service Providers (ISPs). In order to estimate the number of additional lines and switching capacity required in an exchange or a trunk group, Internet access traffic must be characteri...

The enormous growth of mobile telephone traffic, along with the limited number of channels available, requires efficient reuse of channels. Channel allocation schemes can be divided into three categories: Fixed Channel Allocation (FCA), Dynamic Channel Allocation (DCA) and Hybrid Channel Allocation (HCA). In HCA, channels are divided into two disjoint sets: one set of channels is assigned to ea...

We propose a mathematical model describing the dynamics of a hematopoietic stem cell population. The method of characteristics reduces the age-structured model to a system of differential equations with a state-dependent delay. A detailed stability analysis is performed. A sufficient condition for the global asymptotic stability of the trivial steady state is obtained using a Lyapunov–Razumikhi...

background: iran is one of the countries with considerable road traffic injuries.  pre-hospital interventions have an important role in preventing mortalities and disabilities caused by traffic accidents.the present study aimed to explore the barriers of pre-hospital care in traffic injuries in tehran, iran. methods: a qualitative content analysis approach was conducted based on 21 semi-structu...