In this paper, an M/M/1 queue with working vacation and vacation interruption is investigated. The server is supposed to take a working vacation whenever the system becomes empty and if there are at least N customers waiting in the system at a service completion instant, vacation interruption happens and the server resumes a normal working period. A matrix geometric approach is employed to obta...

The Narrow Field Infrared Adaptive Optics System (NFIRAOS) is the first light Adaptive Optics (AO) system for the Thirty Meter Telescope (TMT). A critical component of NFIRAOS is the Real-Time Controller (RTC) subsystem which provides real-time wavefront correction by processing wavefront information to compute Deformable Mirror (DM) and Tip/Tilt Stage (TTS) commands. The National Research Coun...

We define and study a resource-allocation game, arising in Media on Demand (MoD) systems where users correspond to self-interested players who choose a MoD server. A server provides both storage and broadcasting needs. Accordingly, the user’s cost function encompasses both positive and negative congestion effects. A system in our model consists of m identical servers and n users. Each user is a...

Mobile information systems are often distinguished as traditional information systems with additional support for mobile devices. This idea is based on the mostly used cellular network architecture. Mobile units have to be wirelessly connected via a base station to a server integrated in a fixed network if their users want to use the capabilities of the information system which are provided by ...

A significant number of cloud storage environments are already implementing deduplication technology. Due to the nature environment, a server capable accommodating large-capacity is required. As capacity increases, additional solutions By leveraging deduplication, you can fundamentally solve cost problem. However, poses privacy concerns due structure itself. In this paper, we point out infringe...

User applications, such as email, calendar, maps, are migrating from local desktop machines to data centers due to the many advantages offered by such a computing paradigm. Furthermore, this trend is creating a marked increase in the deployment of servers at data centers. To ride the price/performance curves for CPU, memory and other HW, inexpensive commodity machines although having low availa...

This paper presents a discrete-time single-server finite buffer N threshold policy queue with renewal input and discreteMarkovian service process. The server terminates service whenever the system becomes empty, and recommencesservice as soon as the number of waiting customers in the queue is N. We obtain the system-length distributionsat pre-arrival and arbitrary epochs using the supplementary...

Mirroring-based reliability as compared to parity-based reliability signi cantly simpli es the design and the implementation of video servers, since in case of failure mirroring does not require any synchronization of reads or decoding to reconstruct the lost video data. While mirroring doubles the amount of storage volume required, the steep decrease of the cost of magnetic disk storage makes ...

Current GIS development pays more attention to the ability of distribution based on the client-server architecture. In a batch mode distributed GIS, a file server functions passively. Information sharing and integrating are far from concurrent, nor is the database integrity controlled. The dynamic Voronoi data model, equipped with a dedicated spatial server, presents a bright future in overcomi...