Sahu V.,Alliance University |
Sharma P.,Devi Ahilya University |
Kumar A.,Devi Ahilya University
Medicinal Chemistry Research | Year: 2013
The present communication deals with the synthesis of a series of 1-[3-methyl-2-(aryldiazenyl)-2H-aziren-2-yl]ethanones. The compounds were synthesized in excellent yields (70-80 %), and the structures were established on the basis of consistent IR, 1H NMR, and elemental analysis data. The purity has been ascertained by chromatographic resolution using hexane-ethyl acetate (6:4 v/v) as binary eluent. All the compounds have been tested for their antimicrobial activity against a representative panel of bacteria i.e., Bacillus subtilis, Escherichia coli, Pseudomonas diminuta, and Staphylococcus aureus using Chloramphenicol as reference drug. All the synthesized compounds were found to exhibit profound antimicrobial activity. © 2012 Springer Science+Business Media New York.
Bhattacharjee K.,Alliance University
2014 Power and Energy Systems Conference: Towards Sustainable Energy, PESTSE 2014 | Year: 2014
Power quality is an all-encompassing concept for a multitude of individual types of power system disturbances. The presence of harmonics in power supply network poses a severe power quality problem that results in greater power losses in the distribution system, interference problems in communication systems and, sometimes, in operation failures of electronic equipment. Shunt active power filters are employed to suppress the current harmonics and reduce the total harmonic distortion (THD). The voltage source inverter (VSI) is the core of an active power filter. The hysteresis current control is a method of controlling the VSI. Hysteresis control can be either of fixed band type or adaptive band type. In this paper, Synchronous Reference Frame (SRF) theory is implemented for the generation of reference current signals for the controller. This paper investigates the effectiveness of the proposed model in harmonics currents mitigation by simulating a model of a three-phase three-wire shunt active power filter based on adaptive hysteresis current control and SRF theory. Simulation results indicate that the proposed active power filter can restrain harmonics of electrical source current effectively © 2014 IEEE.
Suganthi G.,Sathyabama University |
Korah R.,Alliance University
International Review on Computers and Software | Year: 2014
An efficient landmine detection system is one that should offer a high probability of detection and a low false alarm rate irrespective of the size, shape, explosive, casing, soil in which it is buried, depth of burial and varying environmental conditions. Though 100% probability of detection is still a research question, several techniques are being introduced for an effective demining exploiting various available sensors that are used in landmine detection. In this paper, we focus our attention on finding and evaluating appropriate landmine specific features from the fuzzy segmented infrared (IR) landmine images in order to differentiate them from the background clutters. The system consists of four stages. In the first stage, the acquired IR image is preprocessed using a Gaussian filter to remove the noise and smooth the image. In the second stage, fuzzy segmentation is done on the preprocessed image and the false segmented pixels are removed by post processing the segmented image using various morphological operations. Various structural and Gray Level Co-occurrence Matrix (GLCM) statistical features are extracted in the third stage. A fuzzy inference system is presented in the fourth stage which evaluates the extracted data features and generates a mine confidence value which can be compared to the user defined threshold in order to classify the potential targets as mines or clutters. © 2014 Praise Worthy Prize S.r.l. - All rights reserved.
Hegde C.,Alliance University |
Isloor A.M.,National Institute of Technology Karnataka |
Padaki M.,Bangalore University |
Fun H.-K.,King Saud University
Arabian Journal of Chemistry | Year: 2013
The present work describes about the synthesis and characterization of Polysulfone blend nanoporous membrane with nonwoven support. This Nonwoven support provides mechanical strength to membrane while filtration process and minimizes membrane fouling. Hence it helps in better membrane performance in terms of salt rejection, improved flux, thermal stability and fairly increases in proton conductivity. In this work we have used K.C.270 nonwoven material consisting of fine polyester fibers and has a thickness of below 110. μm. © 2011.
Leon L.,Loyola Marymount University |
Kalbers L.,Loyola Marymount University |
Coster N.,Loyola Marymount University |
Abraham D.,Alliance University
Decision Support Systems | Year: 2012
Past studies show that only a small percent of organizations implement and enforce formal rules or informal guidelines for the planning, design and development, usage, modification, and disposition stages of spreadsheet models. Due to the lack of such policies, there has been little research on how companies can effectively govern spreadsheets throughout their life cycle. This paper describes a survey involving 43 participants from the United States, representing companies that were working on compliance with the Sarbanes-Oxley Act of 2002 (SOX) as it relates to spreadsheets for financial reporting. The findings of this survey describe specific controls that organizations have implemented to manage spreadsheets for financial reporting throughout a spreadsheet's life cycle. Our findings indicate that there are problems in all stages of a spreadsheet's life cycle and we suggest several important areas for practice and future research. © 2012 Elsevier B.V. All rights reserved.