Work-conserving disciplines may be implemented with the use of scheduling calendars. Since calendars have finite resolutions, theoretical emission times that determine the positions of frames within the calendar slots have to be rounded to match the boundaries of the slots. The selection of a rounding method affects the performance of a work-conserving discipline. In this paper, we present an e...

In this paper, we compare the use of two packet models in slotted optical ring networks: a model where each packet has to be routed in consecutive slots, and a model where the slots that form a packet can be routed independently. We first focus on the algorithmic complexity of the related problems. Then, we give the results we obtain with an OMNET simulator in terms of packets’ overdelay and ji...

It is shown that a Partitioned Optical Passive Stars (POPS) network with g groups and d processors per group can route any permutation among the n = dg processors in one slot when d = 1 and 2⌈d/g⌉ slots when d > 1. The number of slots used is optimal in the worst case, and is at most the double of the optimum for all permutations π such that π(i) = i, for all i.

To improve the low aerodynamic efficiency and reduce high energy consumption of a single-stage circulation control wing, multistage wing was designed. By combining force measurement particle image velocimetry (PIV), flow-field characteristics an aerofoil were investigated with respect to increase in number blowing slots, changes coefficient, different ratios for three slots. The results reveale...

channel is busy idle slots idle slots This paper analyzes the performance of IEEE 802.11 MAC protocol under a disaster scenario. The performance is measured in terms of the recovery time and the throughput of the protocol when a network disaster occurs. To make the problem amenable to analysis, some approximations are used, and a new technique to collapse a very large state space is introduced....

Due to the lasting growth in air traffic, many international airports have reached their capacity limits. Access major is granted through assignment of airport time slots. Current practices allocating these slots via grandfathering are widely regarded as inefficient by experts. New market mechanisms need take into account synergistic valuations airlines for departure and arrival slots, well fin...

A common technique to realize wideband microstrip antenna is by introducing slots at an appropriate position inside the patch. In this communication a stacked configurated microstrip patch antenna with slots similar to ISI shape introduced on a square radiating patch with a microstrip line feed is presented. The slots introduced in the radiating patch of the proposed antenna increase the fringi...

Throughout much of its existence, Nevada’s gambling industry has been dominated by table games. Historically, slot machines were of secondary importance because they did not generate much revenue and were costly to maintain and operate. Starting in the late 1970s, a series of technological milestones improved the form and function of slot machines, and fueled replacement cycles on casino floors...