Interscience Research Network
Not a member yet
2523 research outputs found
Sort by
Soft Computing Approach To Automatic Test Pattern Generation For Sequential Vlsi Circuit
Get PDFDue to the constant development in the integrated circuits, the automatic test pattern generation problem become more vital for sequential vlsi circuits in these days. Also testing of integrating circuits and systems has become a difficult problem. In this paper we have discussed the problem of the automatic test sequence generation using particle swarm optimization(PSO) and technique for structure optimization of a deterministic test pattern generator using genetic algorithm(GA)
Review of Some Transaction Models used in Mobile Databases
Get PDFMobile computing is presently experiencing a period of unprecedented growth with the convergence of communication and computing capabilities of mobile phones and personal digital assistant. However, mobile computing presents many inherent problems that lead to poor network connectivity. To overcome poor connectivity and reduce cost, mobile clients are forced to operate in disconnected and partially connected modes. One of the main goals of mobile data access is to reach the ubiquity inherent to the mobile systems: to access information regardless of time and place. Due to mobile systems restrictions such as, for instance, limited memory and narrow bandwidth, it is only natural that researchers expend efforts to soothe such issues. This work approaches the issues regarding the cache management in mobile databases, with emphasis in techniques to reduce cache faults while the mobile device is either connected, or with a narrow bandwidth, or disconnected at all. Thus, it is expected improve data availability while a disconnection. Here in the paper, we try to describe various mobile transaction models, focusing on versatile data sharing mechanisms in volatile mobile environments
Analysis of the Effect of Number of Knots in a Trajectory on Motion Characteristics of a 3R Planar Manipulator
Get PDFThe paper presents a method of trajectory planning and motion characteristics of a robotic manipulator. Main objective is to study the motion characteristics of a manipulator and to explore the scope of minimization of jerk. 8th order polynomial is considered for the trajectory design and the effect of number of intermediate knots between start and final positions of a 3R manipulator within the workspace is studied. Displacements, velocities, accelerations and jerk of end-effectors on a linear path are presented. The simulation for motion of the manipulator is done with the help of AutoLISP on AutoCAD platform
A Self Healing Methodology for Economic Integration of Wind Farms to Modern Power Networks
Get PDFThis paper presents a differential evolution (DE) based methodology to relieve congestion and improve quality and cost efficacy of generated power ,formulating a ‘penalty based congestion constrained OPF problem’ in a hybrid thermal-wind power farm . To satisfy the need of future demand , in view of the growing concern over industrial impact of conventional power plants, the main hindrance in application of Wind power plant apart from uncertainty is its elevated cost. Employing an approach of ‘Demand sensitive loss factor’ (DSLF) to select the worst possible inadvertent states of the system and the weakest bus of the system in active, reactive loading the algorithm attempts to reschedule the generators to bring down the individual line flows to provide better congestion management keeping in view of minimization of the cost of generation and the line losses not only at normal condition but also stressed loading condition and contingency cases. The results also illuminate a profitable economic situation in favor of proposed system at increased loading where total line loss decreases and total cost in conventional and proposed system converges, also not to forget the better operating conditions in comparison to conventional system. The efficiency of the proposed system has been tested on a modified IEEE 30 bus benchmark system
Design of Control Secheme and Performance Improvement for Multilevel Dc Link Inverter Fed PMBLDC Motor Drive
Get PDFPMBLDC motors are gaining a lot of popularity due to their high efficiency as the Permanent Magnets do not carry current which results in negligible copper losses as compared to asynchronous motors. This paper introduces a design for speed control of the PMBLDC motor using multilevel dc link inverter fed by a Boost Converter. The multilevel dc link inverter consist of five level voltage sources, which are controlled by switches. The motor can be driven at different speed level as per its load requirement by making use of five level MLDC Link Inverter. In case of traditional inverter which is only a one level inverter the speed cannot be controlled as per the load requirement. The MLDC link inverter provides the output voltage waveform in step shape form. Thus as the number of cells (n) increases output voltage touches the fundamental component. The input voltage is low, thus to increase the input voltage given to the MLDC link inverter the (Boost Converter) has been designed. The Boost Converter is placed in between (DBR)Diode Bridge Rectifier and (MLDCLI). Both the design and results of Single level inverter and Multilevel Dc Link Inverter are obtained and compared by using the MATLAB Software along with the use of Simulink and Simpower system Tools
A Secure Short Signature Scheme Based upon Biometric Security
Get PDFThis paper presents a short signature scheme whose security is based upon two computationally hard problems, namely, discrete logarithm problem (DLP) and Integer factorization problem (IFP). In this scheme, biometric feature values of the signer are used to compute biometric cryptographic key, which is further used in signature generation. As biometric data is unique to a person, the signature cannot be forged. Also the length of the signature is short, which helps to reduce communication overhead. The verification cost of the proposed scheme is low, thus applicable in real life scenarios, such as e-voting, e-cash and e-commerce
Expanded Bed Adsorption: An Option For Energy Savings In Multiple Proteins Purification
Get PDFExpanded Bed Adsorption enables the protein recovery directly from cultivations of microorganisms or cells and preparations of disrupted cells, without the need for prior removal of suspended solids. The performance ofan expanded bed is comparable to a packed bed owing to reduced mixing of the adsorbent particles, clogging/plugging of solid particles in the column, while fluidized bed requires more velocity which may hinder the adsorption equilibrium. However,optimal operating conditions are more restricted than in a packed bed/fluidized bed due to the dependence of bed expansion on the sizeand density of the adsorbent particles as well as the viscosity and density of the feedstock. These difficulties can beovercomes in expanded-bed chromatography. In this work the steady state hydrodynamic behaviour of expanded beds studied experimentally.The present study focused on hydrodynamics of multiple particles separation and subsequently can be applied to the multiple proteins separation in a single expanded bed
Fea Based Study of Effect of Radial Variation of Outer Link in A Typical Roller Chain Link Assembly
Get PDFChain Link assembly is extensively used in the industry, the scope of this paper is to review the applications in the industry and explore the design considerations that go into the design of the assembly. The paper delves into various application aspects and manufacturing aspects to formulate an idea of the system. Finally Finite Element Analysis (FEA) has been used to conduct shape optimization. Since lot of work has already been done in other components, in this paper the focus has been narrowed down to specific component of outer link. Within the outer link, most dimensions in the industry are parametrically defined, however one dimension, the radius that is in between the inter connecting holes is left to manufacturer convenience. In this paper we assess the impact of this radius on the stress in the system, and see if material saving and consequently efficiency increment is possible
INLINE ELASTICITY MEASURE OF TEXTILE USING ANN
Get PDFIn this paper, we propose a technique to measure the Elasticity Modulus of the textile material using flex LVDT. Elasticity modulus is measured indirectly by measuring stiffness of the material first. The material whose stiffness is to be measured is subjected to a known force and the deflection caused in the material due to applied load is measured using the LVDT. Here the whole measurement is done dynamically without halting the manufacturing line of process. The output of LVDT is AC voltage. AC-DC converter is used to convert the AC output voltage of LVDT to DC output voltage. This is cascaded to the ANN block programmed on the LabVIEW platform. The results show that the proposed technique has achieved its proposed objectives