background: hospital emergencies have an essential role in health care systems. in the last decade, developed countries have paid great attention to overcrowding crisis in emergency departments. simulation analysis of complex models for which conditions will change over time is much more effective than analytical solutions and emergency department (ed) is one of the most complex models for anal...

We propose a model for disorderly streetcar routes. Through simulations and comparisons to real data, we illustrate that such routes may sometimes become supersaturated, in the sense that forward and backward waiting times become positively correlated.

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...

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...

Using a weak migration and weak mutation approximation, I studied the average waiting time to parapatric speciation. The description of reproductive isolation used is based on the classical Dobzhansky model and its recently proposed multilocus generalizations. The dynamics of parapatric speciation are modelled as a biased random walk performed by the average genetic distance between the residen...