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Volume 01 Issue 01 (April 2014)

S.No. Title & Authors Page No View

Title : Minimization of PAPR by DFT-spread OFDM for LTE uplink transmission

Authors : Er. Dalbir Singh, Er. Rohit Garg

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Abstract : In this paper a method is introduce to reduce peak to average power (PAPR) for Single Carrier Frequency Division Multiple Access (SCFDMA) for different digital modulation types like; Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK) and 16 Quadrature Amplitude Modulation (QAM) and 64 Quadrature Amplitude Modulation (QAM). PAPR is directly related to battery life of the mobile. So PAPR is not a big issue for downlink because station is stationary and does not require battery. However, mobiles are using battery therefore battery life is one of the biggest issues for them. SCFDMA has similar throughput performance and essentially the same overall complexity as OFDMA. A principal advantage of SC-FDMA is the peak-to-average power ratio (PAPR), which is lower than that of OFDMA. SCFDMA is currently a strong candidate for the uplink multiple access scheme in the Long Term Evolution of cellular systems under consideration by the Third Generation Partnership Project (3GPP). Finally the effect on uplink SCFDMA in terms of PAPR with different number of users and effect of pulse shaping is calculated.

Title : Application of RAM Concepts in Industries: A Critical Literature Review

Authors : Dr. Vikas Modgil, Virender Kumar

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Abstract : The paper deals with Reliability, Availability and Maintainability analysis in industries and provides the significant information about the application of RAM concepts in industries. With advancement of science and technology and ever increasing needs of society, the applications of automation is necessity of every industrial system, thereby increasing complexities of industrial systems day-by-day. The products should also provide satisfactory performance with minimum failures during the useful life of products. Therefore, Reliability Engineering emerges as important field, which can provide the answer to the probability of satisfactory performance, economical cost and minimum failures. RAM deals with systematic analysis of system’s failures and their effect on system’s performance. To streamline operations and maintenance, RAM is used as a very important tool. The performance analysis in terms of availability (which is function of reliability and maintainability) provides a quantitative assessment how different maintenance tasks would affect system’s performance.


Authors : M V Seshagiri Rao, V Srinivasa Reddy

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Abstract : This paper presents the studies on the flexural behavior of reinforced concrete beams induced with bacteria Bacillus subtitles JC3. Application of self crack healing capacity of concrete induced with bacteria is the promising technology of the future to repair and maintain the cracks in concrete structures. This mechanism of self crack healing using precipitated calcite by microorganisms enhances both strength and durability characteristics of concrete significantly. This paper focuses the investigations on improved flexural behavior of bacteria induced concrete compared to conventional concrete. Data presented includes the deflection characteristics, cracking behaviour and toughness properties of bacterial concrete. The beams are cast using with bacteria and without bacteria in ordinary grade concrete (M20), standard grade concrete (M40) and High strength grade concretes (M60 and M80). The beams are tested under symmetrical two-point flexural loading as per IS: 516-1999. From the analysis, it was observed that the first crack load, pre-cracking and post-cracking behaviour, deflection pattern, crack development pattern and ultimate load carrying capacity of bacteria incorporated beams improved and this improvement is more pronounced in higher grades of bacteria incorporated concrete beams. Also it is observed that the bacteria incorporated concrete beams exhibited better ductile behaviour than beams without bacteria.

Title : New eras of “intelligent manufacturing systems”

Authors : Dhaval B. Upadhyay

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Abstract : Today, there are lots of changes occur in the manufacturing sector and it is important to transform the actual production systems to intelligent manufacturing systems to face the problems of the 21st century’s manufacturing industry. The proposed new paradigms of IMS are fractal, bionic and holonic manufacturing systems due to the characteristics of greater flexibility, efficiency and intelligence. A new approach with this new paradigms is problem solving through decomposition and agent base solution is seen as one of the promising in responding to the needs of modern companies. Researchers have attempted to apply multi-agent base technology to manufacturing enterprise integration, enterprise collaboration, manufacturing process planning, scheduling and shop floor control. This paper provides a review on the recent achievements in these areas and underlying principles of the construction of an IMS are concisely presented.

Title : Simultaneous Voltage Sag, Swell, Reactive Power Compensation and Voltage Regulation in Distribution System With Series And Shunt Inverters Control Of UPQC

Authors : Ch.Shravani

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Abstract : Voltage Sag/Swell on the distribution system is the one of the phenomena that leads to major Power Quality problem. The extensive use of non-linear loads in distribution system is also a contribution to increase the voltage harmonics and power quality issues. The compensation of Reactive Power is one of the common, but very important issues of Power System at the level of distribution. The voltage drop/swelling can be effectively compensated with a dynamic voltage restorer, series active filter, UPQC. In this paper, a new control controlled concept is proposed for compensation of voltage Sag/Swell and load Reactive power simultaneously by using Unified Power Quality Conditioner. Series and Shunt inverters of UPQC are controlled for obtaining the above mentioned characteristics. Series inverter of UPQC can be controlled in two aspects. For voltage sag and swell can de controlled with active power control and reactive power can be controlled with Power angle control concept. PAC concept can be useful for compensation of voltage sag and swell, load reactive power sharing between series and shunt inverters at a time. With this the ratings of shunt inverter can de reduced. Detailed mathematical analysis for the proposed concept that is for series injected voltage and shunt injected current and regulation of voltage with controller is presented in this paper. To support the propos MATLAB/ Simulink based simulation results are developed.