We consider a hybrid Electronic Packet Switched (EPS) and Optical Circuit Switched (OCS) interconnection network (IN) for future HPC and DC systems. Given the point-to-point communication graph of an application, we present a heuristic algorithm that partitions logical parallel tasks to compute resources and configures the (reconfigurable) optical part of the hybrid IN to efficiently serve poin...

One of the key objectives of Universal Mobile Telecommunications System (UMTS) is the realization of enhanced end-user experience through the provision of rich multimedia services, ensuring in parallel an economical delivery cost for service providers. Multimedia Broadcast/Multicast Services (MBMS) framework of UMTS epitomizes the increasing popularity of such applications by efficiently delive...

We study critical properties of the relaxation time at a threshold point in switching processes between bistable states under change in external fields. In particular, we investigate the relaxation processes near the spinodal point of the infinitely long-range interaction model (the Husimi-Temperley model) by analyzing the scaling properties of the corresponding Fokker-Planck equation. We also ...

We solve the coupled mode equations governing the chalcogenide nonlinear fiber Bragg gratings (FBGs) numerically, and obtain the bistability characteristics. The characteristics of the chalcogenide nonlinear FBGs such as: switching threshold intensity, bistability interval and on-off switching ratio are studied. The effects of FBG length and its third order nonlinear refractive index on FBG cha...

Using a Markov‐switching VAR, we show that the effects of uncertainty shocks on output are four times higher in regime economic distress than tranquil regime. We then provide structural interpretation these facts. To do so, develop business cycle model which agents aware possibility changes when forming expectations. The is estimated using Bayesian minimum distance estimator minimizes, over set...

A major problem in an isolated DC/DC converters operating at high switching frequencies is the attendant switching losses in the semiconductor devices. This can be reduced by introducing either zero-voltage switching (ZVS) or zero-current switching (ZCS) of the semiconductor switches. This paper deals with the simulation, design, fabrication and experimental evaluation of a novel soft-switching...

in recent years, there has been a fast growth in wind energy conversion system (wecs). there are two general types of wind turbines in wecs: fixed speed wind turbines and varying speed wind turbines.permanent magnet synchronous generator (pmsg) is one of the most attractive generators for the varying speed turbine wecs.in this paper, a fuzzy controller is proposed to control the current source ...

By reducing the accuracy of the Logarithmic Number System (LNS) it is possible to achieve lower power consumption for multimedia applications, such as MPEG, without sig-niicantly lowering the visual quality of the output. An LNS wordsize of 8 to 10 bits produces a comparable MPEG output as a xed-point wordsize of 14 to 16 bits. The switching activity of an LNS ALU that computes the Inverse Disc...

Over the last few years we have witnessed a wide deployment of point-to-point wavelength division multiplexing (WDM) transmission technology in the Internet infrastructure. The corresponding massive increase in network bandwidth due to WDM has heightened the need for faster switching at the core of the network. At the same time, there has been a growing effort to enhance the Internet Protocol (...

Photovoltaic power generation system implements an effective utilization of solar energy, but generally has very low conversion efficiency. Maximum power point tracking (MPPT) is used in photovoltaic (PV) systems to maximize the photovoltaic array output power, irrespective of the temperature and irradiation conditions and of the load electrical characteristics. A MPPT system has been developed...