In recent years, China's civil aviation industry has been growing, and the ensuing impact both beneficial detrimental, with various causes of flight delays coming one after another, resulting in creation a delay prediction system. order to improve quality convenience reduce losses caused by delays, system will make study reasons for emergence series response plans form set increasingly perfect ...

background: the purpose of this study was to compare patient delay, diagnosis delay and treatment delay in breast cancer patients of selected public and private health centers in tehran, iran. methods: in this cross-sectional study, female patients with newly diagnosed breast cancer in a public medical complex and a private breast clinic within one year were included. patient delay was consider...

Background: Operating room (OR) is one of the main hospital parts and management of time and cost are very important in this essential unit. Also, due to the close relationship with other departments, improving its service quality and performance, significantly increases the efficiency of hospital. OR is a complex system in which each lack of coordination effects on all hospita...

In this paper, sufficient conditions are investigated for the existence of periodic (not necessarily positive) solutions for nonlinear several time delay population system with feedback control. Nonlinear system affected by an periodic external source is studied. Existence of a control variable provides  the extension of  some previous results obtained in other studies. We give a illustrative e...

conclusions the delay time from symptom onset to hospital admission was high in patients with ami. it is necessary to create emergency medical system (ems) stations in suburbs and train the public on the importance of quick contact with the ems when the symptoms of an ami are observed. results the median delay was 129 minutes (mean ± sd, 240.44 ± 295.30). overall, 32.5% of patients were admitte...

A delayed SEIRS epidemic model with pulse vaccination and nonlinear incidence rate is proposed. We analyze the dynamical behaviors of this model and point out that there exists an infectionfree periodic solution which is globally attractive if R1 < 1, R2 > 1, and the disease is permanent. Our results indicate that a short period of pulse or a large pulse vaccination rate is the sufficient condi...