background hospital emergency departments (eds) are as barometers of the health care system. crowded eds threaten delivery of timely care. prolonged ed wait times reduce the quality of care and increase adverse and sometimes irreversible events. objectives the purpose of this study was to determine the patients' waiting time at namazi and shahid faghihi hospitals in shiraz, iran. patients and m...

Emergency unit plays vital role in the hospital which is used to treat the patient who needs an immediate treatment. Critical patients need to be treated immediately, which requires sufficient resources. Resource planning is a most important scenario which needs to be considered while treating the patients in Emergency Department (ED) of hospitals by providing sufficient resources. Using simula...

The problem of determining whether a set of tasks can be assigned to a set of heterogeneous processors in general is NP-hard. Generating an efficient schedule of tasks for a given application is critical for achieving high performance in a heterogeneous computing environment. This paper presents a novel algorithm based on Ant Colony Optimization (ACO) for the scheduling problem. An attempt is m...

Human activity patterns display a bursty dynamics with interevent times following a heavy tailed distribution. This behavior has been recently shown to be rooted in the fact that humans assign their active tasks different priorities, a process that can be modeled as a priority queueing system [A.-L. Barabási, Nature (London) 435, 207 (2005)]. In this Letter we obtain exact results for the Barab...

in the current seismic data acquisition techniques, sources are fired with large time intervals in order to avoid interferences between the responses of successively firing sources, measured by the receivers. this leads to a time-consuming and expensive survey. theoretically the waiting time between two successively firing sources has to be infinite, since the wavefield never vanishes completel...

City and Hackney Adult Mental Health Referral and Assessment Service (CHAMHRAS) is the single point of entry for all mental health referrals to secondary services, with the exception of perinatal referrals, in the City and Hackney region of London, UK. CHAMHRAS was established in 2013 with the objective of providing a one-stop point of referral which screens urgent and non-urgent referrals of a...

An outpatient department in which non-urgent patients arrived for consultation faces with the problem of patients’ long waiting time. Lack of an effective appointment is considered as the cause. In this study, a discrete event simulation model was developed to evaluate an appointment system. The developed system considered appointment rule, sequencing rule and environmental factor (priority rul...

This study aimed to identify the bottlenecks in patients' journeys through an emergency department (ED). For each stage of the patient journey, the average times were compared between two groups divided according to the four hour time frame and disproportionate delays were identified using a significance test These bottlenecks were evaluated with reference to a lean thinking value-stream map an...

In this paper, we consider a proportional delay model for Internet differentiated services. Under this model, an ISP can control the “spacing” of waiting times between different classes of traffic. Specifically, the ISP tries to ensure that the average waiting time of class traffic relative to that of class traffic is consistently a specifiable ratio. If the ratio is less than one, the ISP can ...

Kinesin is a molecular motor that transports cargo along microtubules. The results of many in vitro experiments on kinesin-1 are described by kinetic models [1] in which one transition corresponds to the forward motion and subsequent binding of the tethered motor head. We argue that in a viscoelastic medium like the cytosol of a cell this step is not Markov and has to be described by a non-expo...