| ARTICLES |  | |
| The Framework and Algorithms for the Survivable Mapping of Virtual Network onto a Substrate Network | p. 381 | |
| Gang Sun, Hongfang Yu, Lemin Li, Vishal Anand, Hao Di DOI:10.4103/0256-4602.85968 | ||
| [ABSTRACT] [HTML Full text] [PDF] [Mobile Full text] [EPub] [Sword Plugin for Repository]Beta | ||
| Development of Segmentation Methods for Vascular Angiogram | p. 392 | |
| Kaiqiong Sun DOI:10.4103/0256-4602.85970 | ||
| [ABSTRACT] [HTML Full text] [PDF] [Mobile Full text] [EPub] [Sword Plugin for Repository]Beta | ||
| Utilizing Faulty Cores | p. 400 | |
| Karthik Raghavan, Kamakoti Veezhinathan DOI:10.4103/0256-4602.85972 | ||
| [ABSTRACT] [HTML Full text] [PDF] [Mobile Full text] [EPub] [Sword Plugin for Repository]Beta | ||
| Cooperative Communication: A Review | p. 409 | |
| Himanshu Katiyar, Ashutosh Rastogi, Rupali Agarwal DOI:10.4103/0256-4602.85974 | ||
| [ABSTRACT] [HTML Full text] [PDF] [Mobile Full text] [EPub] [Sword Plugin for Repository]Beta | ||
| Review of Sensor-based Activity Recognition Systems | p. 418 | |
| Donghai Guan, Tinghuai Ma, Weiwei Yuan, Young-Koo Lee, AM Jehad Sarkar | ||
| [ABSTRACT] [HTML Full text] [PDF] [Mobile Full text] [EPub] [Sword Plugin for Repository]Beta | ||
| Optimal Frequency-time Allocation in Cognitive Radio Wireless Mesh Networks | p. 434 | |
| Guanzhe Zhao, Jin Li, Kihwan Lee, Ju Bin Song DOI:10.4103/0256-4602.85976 | ||
| [ABSTRACT] [HTML Full text] [PDF] [Mobile Full text] [EPub] [Sword Plugin for Repository]Beta | ||
| Necessary Conditions for Stability of Kharitonov Polynomials | p. 445 | |
| Yogesh V Hote DOI:10.4103/0256-4602.85977 | ||
Sunday, November 20, 2011
IETE Technical Review-September-October 2011
Monday, November 14, 2011
Wednesday, November 9, 2011
Sourth Asian Journal of Management
olume 18 Issue No.3 July - September 2011  |
|
Indian Foundry Journal-Oct 2011
ELECTRICAL ENGG. Volume:92 2011 SEP
| 1 |  | Emission Constrained Optimal Power Flow using Binary and Real Coded Genetic Algorithms | Optimal Power Flow leads to reduction of generation cost, system loss, improved voltage profile, reduction in line and equipment loadings and increased power transfer capability subjected to usual equality and inequality constraints. Due to increased awareness about pollution level, reducing atmospheric pollution levels cannot be ignored.Hence the present paper aims at solving Emission Constrained Optimal Power Flow. Genetic Algorithms gaining lot of popularity in solving power system optimization problems. In view of this both Binary Coded Genetic Algorithm and Real Coded Genetic Algorithm have been applied to solve the Emission Constrained Optimal Power Flow. IEEE 14 and IEEE 30 Bus test systems have been considered to demonstrate the effectiveness of the algorithms. |
| 2 | | Integrated Electronic Load Controller for Power Quality Improvement of Isolated Asynchronous Generator in Small-Hydro Power Generation | This paper presents an implementation of an integrated electronic load controller (IELC) for regulating the voltage and frequency of an isolated asynchronous generator (IAG) that can supply electricity in remote areas. The IELC is combination of VSC with a dc link capacitor, a chopper and an auxiliary load at its dc bus.It regulates active and reactive powers of the small hydro plant thus regulating the voltage and frequency of IAG system. Beside the voltage and frequency control of IAG, the IELC balances the IAG system under unbalanced loading conditions and eliminates the harmonics of the loads thereby acting both as a load balancer and a harmonic eliminator. The zigzag/star transformer optimizes the dc bus voltage and acts as a neutral current compensator. The proposed IAG along with its IELC is implemented on a 3.7kW IAG system using a DSP. |
| 3 | | Modelling, Design and Optimization of PI Controller Parameters – Continuous and Discrete Data Approach | This paper presents a systematic procedure for the optimum design of PI controller parameters using empirical and GA based tuning methods. The controllers are designed for a continuous data system taking an example of dc link voltage control loop. For real time implementation of the control (through micro controllers/microprocessor), input parameters are sampled at a frequent interval, it makes the system discrete in nature.Hence PI controller parameters are also designed using discrete data approach. Paper also describes the development of linear mathematical model of the system by applying small signal perturbation technique. |
| 4 | | Optimal Reliability Planning of an Electrical Distribution System using Differential Evolution | Customer oriented and energy based reliability indices are evaluated for assessing reliability performance of distribution systems. Some important indices are SAIFI, SAIDI, CAIDI and AENS. In turn these indices are functions of failure rate and average repair time of each segment of distribution system.A methodology has been developed in this paper for optimum determination of failure rates and repair times using a population base optimization technique known as differential evolution (DE) accounting constraints on these indices. The algorithm has been implemented on a sample radial distribution system. |
| 5 | | Pricing System Security in Deregulated Market Including Voltage Stability Constraint | This paper proposes a pricing system for power system security in deregulated market, which includes voltage stability constraint (VSC). The VSC is included in a multi-objective optimal power flow (OPF) that maximizes the social benefit. Ancillary service (reactive power) and system congestion has been considered in the pricing. Effect of N-1 contingency on pricing is also analyzed. Pricing is decided one day ahead using forecasted demand data. The OPF is solved by linear programming method. The system is divided into three areas for which total transfer capacity (TTC) is calculated by repeated power flow technique.The available transfer capacity decides the amount of congestion that affects the pricing. The voltage stability is ascertained by checking the singularity of the system Jacobian matrix. Finally, effect of line/generator loss on pricing system is studied. The model is tested on modified IEEE 14-bus and 30-bus systems and is implemented using MATLAB programming. |
Indian Journal of Pure and Applied Physics-OCTOBER 2011
VOLUME 49 | NUMBER 10 | OCTOBER 2011 | |
CONTENTS | |
General | |
Design studies and testing of a torque transducer | 653 |
Practical method for thermal compensation of long-period compound pendulum | 657 |
Nuclear Physics | |
Study of radon exhalation rates using LR-115 (II) nuclear track detectors in coal-mining area of the foothills of Mokokchung District, Nagaland | 665 |
Dual energy gamma scanning technique to analyze condition of distillation columns | 669 |
Atomic and Molecular Physics | |
DFT and ab-initio study of structure of 1,4-dichloro-2-nitrobenzene | 673 |
Vibrational analysis of 1-chlorononane | 679 |
Condensed Matter: Structural, Mechanical and Thermal Properties | |
Microwave absorption in antiferroelectric tin chloride dihydrate crystal | 686 |
First principles study of electronic, elastic and lattice dynamical properties of Mg2X (X= Si, Ge and Sn) compounds | 692 |
Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
Hot-pressed nano-composite polymer electrolytes: (1-x) [70PEO:30KBrO3]:xSiO2 | 698 |
Interdisciplinary Physics and Related Areas of Science and Technology | |
Voltage-mode multifunctional biquadratic filter using single DVCC and minimum number of passive elements | 703 |
709 | |
711 | |
Authors for correspondence are indicated by (*)
Keyword Index
1-Chlorononane 679
Anharmonic interaction 686
Antiferroelectrics 686
Belt of Schuppen 665
Biquadratic filter 703
Clock 657
Compound pendulum 657
Density functional theory 673
Differential scanning calorimetry 698
Differential voltage current conveyor 703
Dilatation 657
Dual energy 669
Electronic band structure 692
Exhalation rate 665
Finite element analysis 653
FTIR 673, 679
FT-Raman 673
Gamma Scanning 669
Green’s function 686
Hot-pressed polymer electrolytes 698
Ionic conductivity 698
LR-115 (II) nuclear track detectors 665
Mechanical properties 692
Microwave absorption 686
Normal co-ordinate calculations 679
Phonon 692
Radon 665
Raman 679
Ratio profile 669
Scanning electron microscope 698
Semiconductor 692
Strain gauges 653
Temperature 657
Thermal compensation 657
Thrust 665
Torque transducer 653
Vibrational spectra 673
Voltage-mode circuit 703
Monday, October 17, 2011
PRODUCTION ENGG. Volume:92 2011 SEP
| 1 | | Correlation of Mechanical Properties of Friction Welded Low Carbon Steel to Stainless Steel Joints with Microstructure and Fractography | Steel joints are used in the chemical, nuclear and defence sectors.Some research work has been done on welding of similar as well as dissimilar steel joints. Generally, similar steel joints can be joined by fusion welding techniques like TIG and MIG welding, but in case of dissimilar welds, solid state welding has to be gone in for because of thermal mismatch. In this paper, a low carbon steel-stainless steel combination has been welded using friction welding.The welding parameters include friction pressure, upset pressure, speed of rotation and burn-off length. Speed of rotation has been kept constant in this case. Later, effect of speed of rotation alone with other parameters fixed is reported. Mechanical properties like tensile strength, impact strength and bend angle have been determined and the properties varied depending on friction welding parameters. Microstructures and SEM micrographs have been shown to explain the results. |
| 2 | | Finite Element Investigations of Material Models in the Machining Simulation of AA6082(T6) Alloy | Aluminium alloys are widely used in the structural industry due to their inherent high strength to low weight ratio. In particular, AA 6082 (T6) is an AlSi1MgMn alloy known for its superior anti-corrosion and anti-oxidation properties combined with its excellent formability and machinability. The T6 temper in particular possesses higher tensile strength than other types. In this paper, a finite element analysis (FEA) of machining of AA 6082 (T6) is presented.Orthogonal cutting experiments were carried out on a tube of AA 6082(T6) material with a cutting speed of 82 m/min and feed rates of 0.102, 0.159, 0.205 and 0.26 mm/rev. The Johnson-Cook (J-C) and Zerilli-Armstrong (Z-A) constitutive equations were implemented in the FE (finite element) code to study the behaviour of AA 6082 (T6) during the machining process. The predicted values for cutting force, chip thickness, shear angle and shear strain were compared with experiments and have been presented in this paper. The FE results for effective stress, strain, strain rate and temperature were analyzed. The simulation results showed good predictive qualities for the J-C model marginally better than the Z-A model for most parameters. |
| 3 | | Finite Element Simulation of Forging of Aluminium Truncated Conical Sintered Preforms | The present paper deals with the three dimensional finite element simulation of sinter-forging of aluminium truncated conical preforms using DEFORM-3D software, which considers the heterogeneous deformation due to bulging of preform slant sides, composite die-workpiece interfacial friction conditions, preform densification along with compression and inertia effects. The variation of effective strain, effective stress, effective strain rate, forging load and internal energy dissipation with sinter-forging time were analyzed.The distribution of total displacement, effective stress and effective strain in form of contours on the preform surface were obtained. It was found that effective stress, effective strain, effective strain rate and internal energy dissipation increases with the sinter-forging time and die velocity. It was also noted that effective stress and strains were higher at the edges of preform. |
| 4 | | Multi-response Optimization of Process Parameters in Cold Chamber Pressure Die Casting | The present study aims at investigating the effect of various process parameters in a high pressure die casting process on the properties of aluminum alloy LM 6 and optimize the parameters using multi-response optimization methodology. Four process parameters, namely pouring temperature of the molten metal, injection pressure, coating type and cooling method were varied during the study. The output responses measured after casting were the material density, hardness and the surface roughness of the cast part.Injection pressure was observed to be the most significant factor and pouring temperature was observed to be the least significant factor. The empirical modelling equation was developed that can be used to predict the response values during experimental trials involving similar process conditions. |
| 5 | | Parametric Analysis on Ultrasonic Drilling of Alumina based on Taguchi Method | The ultrasonic machining is a mechanical material removal process which has great potential for machining hard and brittle materials, such as, ceramics, semiconductors and glasses etc. The surface finish of the hole surface drilled by USM can be improved by optimal control of the process parameters. This paper presents the experimental investigation for selecting optimum combination of process parameters, such as, abrasive grit size, slurry concentration, power supply and feed rate in ultrasonic drilling of high alumina (99% Al2O3). Taguchi method with orthogonal array L9(34) has been applied for designing the experimental plan.The surface roughness of drilled holes have been analyzed and optimal settings of process parameters have been determined to achieve the minimum value of surface roughness of holes during ultrasonic drilling of high alumina. The additive models for optimal prediction are validated after conducting the confirmation experiments. |
| 6 | | Wear and Frictional Characteristics of Some Polymeric Materials for Gears used in Machine Tools | Polymers and composites are being extensively used in various tribo systems, such as, bearings, gears, etc where liquid lubricant cannot be used because of various constraints. An attempt has been made in this paper to study the wear and frictional characteristic of some of these materials under various operating conditions.Authors developed a generalized empirical relationship for wear and coefficient of friction of such materials under variable loading and duration of sliding. Based on the experimental observations, it is possible to arrive at a decision in regard to possible combinations of pressure and velocity of sliding, so as to contain the wear within a specific limiting value. |
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