We consider an MXI ell queueing system with N-policy and single vacation. As soon as the system becomes empty, the server leaves the system for a vacation of random length 11: When he returns from the vacation, if the system size is greater than or equal to a pretermined value N(threshold), he begins to serve the customers. If not, the server waits in the system until the system size reaches or...

background : few studies have focused on syndromic data to determine levels of alarm thresholds to detection of meningitis outbreaks. the purpose of this study was to determine threshold levels of meningitis outbreak in hamadan province, west of iran . methods : data on both confirmed and suspected cases of meningitis (fever and neurological symptom) form 21 march 2010 to 20 march 2012 were use...

We consider a wireless sensor network (WSN) where K sensors must deliver a message within a frame of N time slots by spending a given finite energy. If the message is not transmitted within the required delay then it becomes useless and the residual energy is wasted. The channel is block-fading, with independent fades for each sensor and each slot. Sensors know the fading levels up to the curre...

Motivated by a study of the logistics systems used to manage consumable service parts for the U.S. military, we consider a static threshold-based rationing policy that is useful when pooling inventory across two demand classes characterized by different arrival rates and shortage (stockout and delay) costs. The scheme operates as a (Q, r) policy with the following feature. Demands from both cla...

Objective: to demonstrate the effectiveness of combination of radial extracorporeal shock wave therapy and muscle energy technique on pain, range of motion, and neck function of the individuals with active trigger points of upper trapezius muscle. Method: Fifty-four (54) participants with active TrPs of upper trapezius muscle were participated and randomly divided into three groups. Group A (...

This paper describes the design and implementation of a dynamic threshold policy (to be used to classify local node availability, for load-balancing purpose). The experiments were built upon the Extended Gradient algorithm, running over Linux/X86 computing nodes. Results validating the usefulness of the dynamic threshold policy are presented.