Singla D.,YMCAUST |
Sharma P.R.,Electrical and Electronics Engineering
India International Conference on Power Electronics, IICPE | Year: 2012
In this paper, an attempt has been made to determine the proper location of STATCOM and series compensator working independently as well as simultaneously for improving the transient stability of a multi machine power system. The transient stability condition is usually assessed by evaluating critical clearing time (CCT), i.e. maximal fault duration for which the system remains transiently stable. The CCT is obtained by increasing the fault time interval until the system loses its stability. The effect of variation of generator loading, reference source voltage of STATCOM and degree of compensation on transient stability condition has also been considered at various locations of STATCOM and series capacitor. The results indicate the importance of installing STATCOM to a power system due to their effect of not only on stabilizing the system voltages but also increasing the power system critical clearing time in case of unrepeated three phase ground fault. Increase in CCT can help in the reliable operation of the protection system and reduce the protection system rating and its cost. © 2012 IEEE.
Aggarwal S.,University of the Humanities |
International Journal of Applied Engineering Research | Year: 2014
The bottom-up construction and operation of machines and motors of molecular size is a topic of great interest in nanoscience, and a fascinating challenge of nanotechnology. The problem of the energy supply to make molecular motors work is of the greatest importance. Stimulated by chemical reagents, electricity, or light, artificial molecular machines exhibit precisely controlled motion at the molecular level; with this ability molecular machines have the potential to make significant impacts in numerous engineering applications. Research in the last ten years has demonstrated that light energy can indeed be used to power artificial nanomotors by exploiting photochemical processes in appropriately designed systems. More recently, it has become clear that under many aspects light is the best choice to power molecular motors compared with molecular machines powered by chemical or electrical energy. The following issues are significant for light-driven artificial molecular machines in the following aspects: their chemical structures, motion mechanisms, assembly and characterization on solid-state surfaces. Applications in different fields of nanotechnology such as molecular electronics, nanoelectro- mechanical systems (NEMS), nanophotonics, and nanomedicine are envisaged. This short review will focus on the use of light to power artificial molecular motors and machines. It is intended to discuss the design principles at the basis of light-driven artificial nanomotors, and provide an up-to-date overview on the prototype systems that have been developed. © Research India Publications.
Kaur P.,YMCAUST |
2015 International Conference on Signal Processing and Communication, ICSC 2015 | Year: 2015
In this paper, design of compact rectangular microstrip patch antenna (RMPA) using square grid of rods and I shaped metamaterial is presented. To achieve miniaturization of reference patch antenna resonating at 5.2 GHz, I shaped metamaterial is embedded underneath the patch which shifts the resonating frequency to lower side at 4.36 GHz and thus provide 33% compactness in size. Embedding a square grid of rods beneath the patch provides dual band at 2.56 GHz and 4.03 GHz. Besides providing the compactness, both technique also improves the returns loss and enhances the bandwidth. © 2015 IEEE.
Kaur A.,GTBIT |
Grover P.S.,KIIT University |
2015 International Conference on Computing for Sustainable Global Development, INDIACom 2015 | Year: 2015
Software development process leads to the delivery of high-quality software product that satisfies the user requirements. Accordingly, the developed software product should be able to change or evolve after delivery. AOSD aims at encapsulating crosscutting concerns through a new construct class like Aspect and localize the change. Hence, it encapsulates the behavior affecting multiple classes into the reusable module. Moreover, the software maintenance is not only to correct faults but also to extend the software for implementing new or changed user requirements which concerns functional enhancement hence a new maintainability model is proposed for AOSD with extensibility as sub characteristic. As every proposed model requires evaluation hence in order to evaluate the proposed maintainability model we had used Analytical Hierarchy process (AHP) as an approach. © 2015 IEEE.
Singh M.,Jamia Millia Islamia University |
Khan I.A.,Jamia Millia Islamia University |
International Journal of Systems Assurance Engineering and Management | Year: 2011
To manufacture a product, nowadays there are many methods available in the market to manufacture them and to earn more profits and best production which is the prime focus of any manufacturing industry, it is necessary to select only that type of manufacturing process which leads to more profits, less scraps, and reworks, faster production rate, good quality of production, employee satisfaction, customer satisfaction, etc. So the aim of this paper is to judge the best manufacturing process among various manufacturing processes for manufacturing any product using graph theoretic approach. The graph theoretic approach reveals a single numerical index and accordingly it is possible to choose the best manufacturing process. To apply the graph theoretic approach the authors selected four factors namely: Quality, Cost, Technical Capability, and Production. Based on these factors and their co-factors a fish bone diagram is represented. While applying graph theoretic approach a digraph of the characteristics is drawn which represented the factors and co-factors affecting the selection of manufacturing process and further the interdependency of the factors as well as their inheritances has been identified and its representation in the matrix form has been used for the calculation of numerical index of the manufacturing process through its variable permanent quality function. The technique is applicable when there are more than options are available for manufacturing a product. An example is also shown in the last of the paper to understand the application of graph theoretic approach for the selection of best manufacturing process among three processes. © 2012 The Society for Reliability Engineering, Quality and Operations Management (SREQOM), India and The Division of Operation and Maintenance, Lulea University of Technology, Sweden.