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...

In Round-Robin Scheduling, the time quantum is fixed and processes are scheduled such that no process uses CPU time more than one time quantum in one go. If time quantum is too large, the response time of the processes will not be tolerated in an interactive environment. If the time quantum is too small, unnecessary frequent context switch may occur. Consequently, overheads result in fewer thro...

OBJECTIVES In Spain, official information on waiting times for surgery is based on the interval between the indication for surgery and its performance. We aimed to estimate total waiting times for surgical procedures, including outpatient visits and diagnostic tests prior to surgery. In addition, we propose an alternative system to manage total waiting times that reduces variability and maximum...

As storage system runs an increasing variety of workload, there may be many file requests do not dispatch for a long time. The web clients who wait a long time will leave away. This paper presents a novel non-partitioning file assignment strategy called Static Approximate Fairness algorithm (SAF) in parallel I/O system. The SAF algorithm aims at obtaining approximate mean waiting time for disk ...

The usage of the radio spectrum for wireless communication is considered to be inefficient. Therefore, through cognitive radio, unlicensed users can occupy idle spectrum bands without interference with the primary user. Generally, when the arrival rate of licensed users is high, secondary users may starve. In this paper, we propose two models to improve the average total waiting time for the se...

We propose a new approach for model selection in mathematical statistics that is based not on the probability but on the ‘waiting time’ of a sample. By waiting time of a sample we understand the average time of the first appearance of the sample in a sequence of independent identically distributed random variables. In the paper we consider a few simple examples to illustrate the main idea and f...