http://nopr.niscair.res.in/handle/123456789/4419 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/4431 Title: Microprocessor-based system for identification of phase sequence and detection ofphase unbalance of three-phase ac supply <br/> <br/>Authors: Kundu, Palash; Das, Arabinda <br/> <br/>Abstract: A prototype detection system based on 8085 microprocessor / 8751 microcontroller has been developed for identificationof phase sequence and detection of phase unbalance. System principle compares self-generating code by hardware circuit withpre-defined specific codes corresponding to positive and negative sequences for successful match in each measuring cycle.System is also capable in detecting phase unbalance, if any. Rule based intricate software algorithm is developed and operateswithin a cycle. Processor generates signals for detecting phase sequence and phase unbalance up to a recommended value <br/> <br/>Page(s): 597-604 Sun, 28 Jun 2009 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/4430 Title: Mathematical modeling of process parameters on hard turning ofAISI 316 SS by WC insert <br/> <br/>Authors: Ranganathan, S; Senthilvelan, T; Sriram, G <br/> <br/>Abstract: This paper presents a newly developed mathematical modeling for process parameters on hard turning of AISI 316stainless steel by tungsten carbide inserts (WC). Regression analysis and ANOVA theory was used to predict surface roughness(Ra) and tool wear (VB). WC tool inserts performed machining of AISI 316 SS to study main and interaction effects of processparameters [cutting speed (Vs), feed rate (fs) and depth of cut (ap)]. Adequacies of developed model were verified by calculationof correlation coefficient (r). These models can be effectively used to predict Ra of work piece and VB of WC insert. <br/> <br/>Page(s): 592-596 Sun, 28 Jun 2009 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/4429 Title: Ensuring information security through 123-bit recursive substitution of bitsthrough prime-nonprime detection of sub-stream (RSBP) <br/> <br/>Authors: Dutta, Saurabh; Mandal, Jyotsna Kumar <br/> <br/>Abstract: This paper presents a 123-bit private-key based block-cipher, RSBP, which is capable of encrypting files of up to 11 MB.It is formulated on the basis of base-10 value corresponding to a block of bits, which is to be checked if is prime or not. It resultsin an alteration of size for file being encrypted. Its executable performance is analyzed on the basis of execution time, graphicallayout of frequency distribution of characters, and Chi square values for varying degrees of freedom. RSBP is found to behighly compatible with existing cryptosystems. <br/> <br/>Page(s): 584-591 Sun, 28 Jun 2009 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/4428 Title: Extended finite element method (XFEM) for analysis of cohesive rock joint <br/> <br/>Authors: Deb, Debasis; Das, Kamal Ch <br/> <br/>Abstract: Recent developments in extended finite element method (XFEM) having strong discontinuity imbedded within a regularelement provide an opportunity to analyze discrete discontinuities in rock mass without any numerical illposedness. XFEMis based on partition unity principle and can be used for cohesive rock joints. Equilibrium equation and traction condition aresolved by Newton-Raphson method to obtain nodal displacements and external load simultaneously. This paper summarizesmathematical frameworks for implementation of strong discontinuities in 3 and 6 nodded triangular elements and alsoprovides numerical examples of application of XFEM in one and two dimensional problems with single joint. Resultsobtained from XFEM are in good agreement to those of analytical as well as experimental results. <br/> <br/>Page(s): 575-583 Sun, 28 Jun 2009 22:58:59 GMT