OBJECTIVES The purpose of this research was to measure fever prevalence and the effectiveness of a fever screening procedure in detecting febrile arrivals at an international airport in Korea. METHODS Data were retrieved from arrivals' health declaration forms and questionnaires for febrile arrivals at an international airport collected by a national quarantine station during the year 2012. S...

In the process of studying the number of tourist arrivals of each moment on every day, one of the key findings is a very good statistical regularity about tourist total arrivals. There exists high similarity among different scales of tourist arrivals, including the nearly same change trend. And on this basis this paper puts forward a new method of modeling and forecasting real-time tourist arri...

The expected capacity ofa class ofsparse concentrators called modular concentrators is determined. In these concentrators, each input is connected to exactly two outputs, each output is connected to exactly three inputs, and the girth (the length ofthe shortest cycle in the connexion graph is large. Two definitions ofexpected capacity are considered. For the first (which is due to Masson and Mo...

In this paper we investigate the efficiency of two solution approaches to infinite stochastic Petri nets: the matrix-geometric method and the spectral expansion method. We first informally present infinite stochastic Petri nets, after which we describe, using uniform notation, the matrix-geometric and the spectral expansion method. We put special emphasis on the numerical aspect of the solution...

In this paper we establish asymptotics for the basic steady-state distributions in a large class of single-server queues. We consider the waiting time, the workload (virtual waiting time) and the steady-state queue lengths at an arbitrary time, just before an arrival and just after a departure. We start by establishing asymptotics for steady-state distributions of Markov chains of M/GI/1 type. ...

In this paper we introduce a general class of rate-based push and pull load balancing strategies, assuming there is no central dispatcher and nodes rely on probe messages for communication. Under a pull strategy lightly loaded nodes send random probes in order to discover heavily loaded nodes, if such a node is found one task is transferred. Under a push strategy the heavily loaded nodes attemp...

Real time systems that are logically programmed for scientific applications involve frequent job arrivals, thus requires a parallel architecture, so that maximum applications can be executed simultaneously resulting in less waiting time and maximum resource utilization. This must be achieved by workload partitioning & characterization, directs towards the development of Multiprocessor machines,...

The expected wait in the Gi/G/1 queue is related to the mean and variance of the idle time. For arrival distributions which are 1FR or have mean residual life bounded by r-, simple bounds are obtained which A. give, for example, the expected number in queue to within at most one customer. By equating input with output, relations between random variables are used to obtain expressions foi the mo...

In this paper we investigate the eeciency of two solution approaches to innnite stochastic Petri nets: the matrix-geometric method and the spectral expansion method. We rst informally present innnite stochas-tic Petri nets, after which we describe, using uniform notation, the matrix-geometric and the spectral expansion method. We put special emphasis on the numerical aspect of the solution proc...

Abstract. Queueing systems with batch service have been investigated extensively during the past decades. However, nearly all the studied models share the common feature that an uncorrelated arrival process is considered, which is unrealistic in several real-life situations. In this paper, we study a discrete-time queueing model, with a server that only initiates service when the amount of cust...