A system model characterized by networks of service stations is used to study trhoughput and response time as a function of system load, and to characterize the effects of saturation in a system. The results are expressed in terms of only three sets of parameters: the matrix of interstation transition frequencies, the light load service rate of each station, and the service capacity of each sta...

The object of this paper is to study joint and marginal distributions of the system states at any arbitrary time moment for a single server, finite source retrial queue, in which the server can sustain breakdowns during service times. The server life times as well as the intervals between repetitions are exponentially distributed, while the repair and the service times are generally distributed...

An approximation technique is considered for computing transmission and reflection coefficients for propagation of an elastic pulse through a planar slab of finite width. The propagation of elastic pulse through a planar slab is derived from first principles using straightforward time-dependent method. The paper ends with calculations of enhancement factor for the elastic plane wave and it is s...

In this paper we analyze a single server queue with batch arrival Poisson input, two heterogeneous service with different general (arbitrary) service time distributions and two phase (compulsory and optional) server vacations with general (arbitrary) vacation period. The first phase of service is essential for all customers, as soon as the first service of a customer is completed, then with pro...

background advanced ambulance service (emergency medical services/ems) is considered to be an integral part of emergency medical care as the first assets responding to emergencies and disasters in the prehospital setting in most developed countries. objectives the aim of this study was to evaluate the current situation of shiraz’s ems by comparing data obtained during two different time periods...

We represent a computer cluster as a multi-server queue with some arbitrary bipartite graph of compatibilities between jobs and servers. Each server processes its jobs sequentially in FCFS order. The service rate of a job at any given time is the sum of the service rates of all servers processing this job. We show that the corresponding queue is quasi-reversible and use this property to design ...

We describe research extending the live coding environment Gibber with affordances for ensemble, networked, live coding performances. ese include shared editing of code documents, remote code execution, an extensible chat system, shared state, and clock synchronization via proportional-integral control. We discuss these features using the framework provided by Lee and Essl in their 2014 paper ...

Companies realize their services by business processes to stay competitive in a dynamic market environment. In particular, they track the current state of the process to detect undesired deviations, to provide customers with predicted remaining durations, and to improve the ability to schedule resources accordingly. In this setting, we propose an approach to predict remaining process execution ...