International Journal of Computer Techniques

1-6

Authors: Rupinder kaur, Shruti Aggarwal

--With faster rate of depletion of fossil fuels the world has now started to greatly depend on renewable sources of energy. Wind energy is undoubtedly one of the most effective weapons to handle the situation. In this paper efforts have been taken to optimize the wind energy generation by induction generator using an embedded based controller. This paper involves a controller design which amalgamates two key functions viz. automatic voltage regulation and frequency control .The automatic voltage regulator is incorporated with the help of flux control. The proposed controller regulates the excitation current of the induction generator to regulate the generated three phase voltage. The reactive power balance of the system can be maintained within tolerable limits by using VAR condensers which is switched accordingly by the embedded controller. The frequency control can be implemented by adjusting the wind turbine pitch according to the wind inrush by measuring the wind speed. The controller provides control pulses to actuate stepper motor suitably which drives the blade to orient itself appropriately .A simulation model is also developed to illustrate this control strategy. The wind is simulated by considering the average wind characteristic

12-17

Authors: Lalit Kumar Saini, Vishal Shrivastava

A wide range of database applications are manage the time-varying data. In existing database technology gives the little support for managing such a time-varying data. The research area for temporary databases aims to change the state of affairs by characterizing the of temporal data and providing large and effective ways to model, store, and query the temporal data. This paper provides a brief introduction to temporal database research system. It concisely introduces fundamental temporal database concepts, surveys state-ofthe-art solutions to challenging aspects of temporal data management, and also offers a look into the future of temporal database research.

21-26

Authors: Dr. Zubair Khan1, Ashish Kumar2, Sunny Kumar

The purpose of this essay is to implement and study different techniques for solving Sudoku puzzles, a problem similar to graph coloring with fixed size and dependencies. Three approaches are presented and compared regarding efficiency (time needed, space required and success rate). These approaches are rule-based solving, simulated annealing, and searching for solutions. Finally the parts found to be most important for an efficient solver are combined, creating an even better solve. Sudoku puzzles involve a lot of mathematics. Of course, the puzzles are filled with numbers, but the solution process would be the same regardless of the symbols used. More interesting is the logic behind the solution process, which can provide extra satisfaction upon solving a puzzle (with a lot less erasing). In addition, the puzzles are examples of Latin squares–important in abstract algebra and in statis- tics, in experimental design

1-6

Authors: Manoj Kumar Sah, Vishal Garg

Object oriented programming has become a very important programming paradigm. Object oriented programming languages supports the classes, Inheritance, Encapsulation and polymorphism. This takes a detailed look at different types of Inheritance. OOPs come into existence in 1960s through the Simula [1] language. Inheritance is one of the cornerstones of OOP because it allows the creation of hierarchical classifications. Using inheritance, we can create general class that defines traits common to a set of related items. This class may then be inherited by other, more specific classes, each adding only those things that are unique to the inheriting class. When a class inherits another, the members of the base class become members of the derived class. Index Terms—About Base class, Derived class, Inheritance, Reusability, Private, Public, and Protected

14-18

Authors: Gurpreet Kaur,Narinder Sharma

The Power dissipation in conventional CMOS circuits can be minimized through adiabatic technique. By adiabatic technique dissipation in PMOS network can be minimized and some of energy stored at load capacitance can be recycled instead of dissipated as heat. But the adiabatic technique is highly dependent on parameter variation.With the help of TANNER simulations, the energy consumption is analyzed by variation of parameter. In analysis, two logic families, ECRL (Efficient Charge Recovery Logic) and PFAL (Positive Feedback Adiabatic Logic) are compared with conventional CMOS logic for inverter. It is finding that adiabatic technique is good choice for low power application in specified frequency range. Keywords: Adiabatic, VLSI, T-SPICE,Inverter and NAND using CMOS, ECRL and PFAL

28-33

Authors: Gurpreet Kaur,Narinder Sharma

Multiplexer’s square measure is a typical building block for data-paths, and is used extensively in a variety of applications together with the processors. In this paper authors have proposed a 4:1 multiplexer using PFAL and ECRL adiabatic logic design technique and compared with the Conventional CMOS Multiplexer. The basic approaches that we used for reducing energy/power dissipation in conventional CMOS circuits include varying the rise time and full time, on decreasing frequency and minimize the switching activities with efficient charge recovery logic. The Adiabatic switching technique based upon the energy recovery principle is one of the techniques which is widely used to achieve low power VLSI design circuits. In the following paper, the power dissipation of various adiabatic circuits is calculated and then simulated using TANNER tool. Keywords:Adiabatic,ECRL,PFAL,T-SPICE, 4:1 Multiplexer Using ECRL and PFAL.