the purpose of this study is estimate waiting time of frost occurrence over iran. the daily data from 663 synoptic and climatology over iran during 1/1/1340 to 11/10/1383 have been used. data interpolated by kriging method on 15ã—15 km pixels. the data base with dimension 15992ã—7187 obtained that on the rows were days and on the column were pixels. by t student test the interval mean of waitin...

Suppose that you are going to school and arrive at a bus stop. How long do have wait before the next arrives? Surprisingly, it is longer—possibly much longer—than what might guess from looking schedule. This phenomenon, which called waiting-time paradox, has purely mathematical origin. In this article, we explore explain why occurs, discuss some of its implications (beyond possibility being lat...

normal 0 false false false en-us x-none ar-sa microsoftinternetexplorer4 background: urban living and transition of illnesses, today has led hygienic centers for dedicating services to serious challenge management of an outpatient center is very difficult. worse is that the patient advice and service time is much less than waiting time. many people to avoid long waiting go to private treatment ...

Background Different strategies for addressing the challenge of prioritizing elective patients efficiently and fairly have been introduced in Norway. In the time period studied, there were three possible outcomes for elective patients that had been through the process of priority setting: (i) high priority with assigned individual maximum waiting time; (ii) low priority without a maximum waitin...

bus systems are unstable without considering any control. thus, we are able to consider some control strategies to alleviate this problem. a holding control strategy is one commonly used real-time control strategy that can improve service quality. this paper develops a mathematical model for a holding control strategy. the objective of this model is to minimize the total cost related to passeng...

Background: Appointment scheduling system is a critical component in controlling patients’ waiting time, so can increase the efficiency and timely access to health services. It is also an important determinant of patient satisfaction. The aim of this study was to assess the relationship of using a scheduling system and outpatients’ waiting time in a general teaching hospital in Tehran, Iran. M...