background: more than 20% of deaths from traffic crashes are related to pedestrians. this figure in tehran, the capital of iran, reaches to 40%. this study aimed to determine the high-risk areas and spatially analyze the traffic crashes, causing death to pedestrians in tehran.   methods: mapping was used to display the distribution of the crashes. determining the distribution pattern of crashes...

this study was done to evaluate the effect of telephone counseling on mother’s health information regarding the growth and development of less than five years old children in isfahan. in this randomized clinical trial, using a questionnaire, the health information of 1755 women having less than five years old children received telephone counseling for 6 month, compared with 1755 women without a...

In this paper we report on an ongoing statistical analysis of actual CCSN traffic data. The data consist of approximately 170 million signaling messages collected from a variety of different working CCS subnetworks. The key findings from our analysis concern: (1) the characteristics of both the telephone call arrival process and the signaling message arrival process, (2) the tail behavior of th...

conclusions considering the high occurrence of the mortality and the injuries of the rtis compared to that of the other types of accidents, more attention to rtis in planning and interventions seems necessary. background road traffic injuries (rtis) are the leading cause of injuries and the second cause of mortality in iran. objectives the aim of this study was to investigate the epidemiologica...

Various techniques, including feed-forward neural networks, are applied to the time series prediction problem. The forecasting of occupancy on a telephone trunk group is taken as a case study. The relative performances of the techniques are reported. Theoretical justifications are provided for the results.

The aim of this paper is to present data performance analyses in Asynchronous Transfer Mode (ATM) network. Cells generated by different type of traffic sources face different priority schema entering the ATM switch. That is because of the different nature of the service used. Real-time services like telephone and video obtain higher priority. Elastic traffic, or data services are considered to ...

Network access systems (NAS) such as digital loop carriers (DLC) are increasingly utilizing a shared medium, such as Hybrid Fiber Coax (HFC) to provide point to multi-point access from the public switched telephone network (PSTN) to the end user (consumer). New services, such as direct access to the packet switched network (PSN, WWW) have been added to DLC equipment in such a way as to provide ...