The Virtual Company educational scenario engages students in a professional setting for working and learning. Students are enabled to develop competencies that are derived from professional practice. This allows us to use assessment strategies that are different from the practice in traditional educational settings. In the Virtual Company educational scenario the competence assessment procedure...

This paper analyzes the performance of single-source and single-relay SR-CARQ protocol in TDMA wireless communication system. We establish its M/G/1 queuing model with vacations, and provide the expressions of its system time delay and saturation throughput. Then the analysis of theory and simulation results under the slow Raleigh fading channel show that under what conditions the SR-CARQ proto...

Collaborating groups sometimes have to resolve conflicts among group members in terms of their preferences and values. When face-to-face or other synchronous communication is not possible, this type of conflict resolution is made relatively difficult by the low bandwidth of communication. We present an approach to this problem that is based on the idea of generative models of group members who ...

The mathematical model of an two-phases-service M/M/1/N queuing system with the server breakdown and multiple vacations was realized and established in the Graduate Employment Services system. Secondly, equations of steady-state probability were derived by applying the Markov process theory. Then, we obtained matrix form solution of steady-state probability by using blocked matrix method. Final...

Introduction:     women's  employment  is one of the fundamental problems in breastfeeding. Studies have shown that after delivery, amount of milk is  equal in the mothers working and non-working. But  after several   months will be reduced markedly. Methods: In this study, with different departments was done coordination , and interviewed with the 351 mothers that had children under two years...

We revisit classical sieves for computing primes and analyze their performance in the external-memory model. Most prior sieves are analyzed in the RAM model, where the focus is on minimizing both the total number of operations and the size of the working set. The hope is that if the working set fits in RAM, then the sieve will have good I/O performance, though such an outcome is by no means gua...

The M/C/1 queue with multiple vacations and gated service discipline is considered. We first provide an alternative approach to derive the Laplace-Stieltjes transform of the limiting waiting time distribution, which reveals the stochastic structure of the gated vacation system. Next we discuss the regenerative cycle of the gated vacation system. Based on these considerations, we carry our a tim...

This paper deals with the steady state behaviour of an Mx/G/1 queuing system with two different vacation periods under multiple vacation policy, where length of the first vacation is different from the rest of the vacations. We are concerned with the distribution of the queue size at busy period initiation epoch and distribution of the unfinished work. Further, we present a simple transform fre...