In this paper, a fuzzy logic controller is proposed for an application of HVDC link to stabilize the frequency oscillation in a parallel AC – DC interconnected power systems. When an interconnected AC power system is subjected to a load disturbance, system frequency may be considerably disturbed and becomes oscillatory. By utilizing the system interconnections as the control channels of HVDC link, the tie line power modulation of HVDC link through interconnections is applicable for stabilizing the frequency oscillation of AC system. The conventional Integral controller does not yield adequate control performance. To overcome this problem Fuzzy Logic Controller (FLC) is employed with a set of control rules. The proposed control technique is studied for a two area non reheat thermal power systems. From simulation results, the performance of the FLC is better during load disturbances.

In this paper we analyze the requirements for the complex information system used to support a modern global university. We outline the architecture for this system based on the emerging cloud computing platforms and present an example of managing a university course by incorporating different Google cloud services within the Google Sites.

With the recent rise of social Web applications, there is an increased interest to bring other services to the Web domain, real-time voice and video in particular. Based on the HTTP model, the Session Initiation Protocol (SIP) [9] was developed to support these services. The telecommunications industry has accepted the SIP protocol, which is now widely implemented and used in telecom application servers.

This is the second of a two-part paper on the SimpleFSM, a domain-specific language, developed to simplify the application develoment for the SIP communication systems. While Part I describes the development of the SimpleFSM and its syntax, Part II gives some details of the SimpleFSM DSL integration with the Java SIP servlet architecture utilizing JRuby, a Ruby implementation for the Java Virtual Machine. Finally, a more complex converged application is developed and implemented using the developed DSL.