Veer Narmad South Gujarat University
Surat, India

Veer Narmad South Gujarat University is a public university located in the city of Surat, Gujarat, India, the 4th fastest growing city in the world. Previously known as South Gujarat University, it was renamed to its present name in the year 2004. This name is in honour of the famous scholar and Gujarati poet, Narmad. Incorporated in 1967, this university offers undergraduate and postgraduate courses in various disciplines. Besides, this university has non-traditional postgraduate departments such as public administration, rural studies, comparative literature and aquatic-biology. Wikipedia.

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Zaveri T.,Veer Narmad South Gujarat University | Bhalja B.,AD Patel Institute of Technology
International Journal of Electrical Power and Energy Systems | Year: 2012

This paper presents comparison of three different control strategies to generate reference current components for Distribution Static Compensator (DSTATCOM). Reference currents are tracked by a three-phase voltage source converter in a hysteresis band control scheme. These methods are instantaneous reactive power (IRP) theory, symmetrical component (SC) theory and an improved instantaneous active and reactive current component (IARCC) theory. The performance of three methods has been evaluated under various source voltage and load conditions with new IEEE Standard 1459 power definitions. A comparative study of their performance in terms of rms value of source current, Total Harmonic Distortion (THD), supply power factor and compensator ratings is also presented. A three-phase, four-wire distribution system supplying linear as well as non-linear load is considered for simulation study which is carried out using MATLAB/SIMULINK software. Under balanced and sinusoidal source voltage conditions, all three control strategies similar performance while an improved IARCC theory outperforms, particularly, under unbalanced and distorted source voltage conditions. © 2012 Elsevier Ltd. All rights reserved.

Zaveri T.,Veer Narmad South Gujarat University | Bhalja B.R.,Ad Patel Institute Of Technology | Zaveri N.,k-Technology
International Journal of Electrical Power and Energy Systems | Year: 2012

This paper deals with a Distribution STATic COMpensator (DSTATCOM) for balancing of source currents, power factor correction and harmonic mitigation in three-phase, three-wire distribution system supplying delta connected load under various source voltage conditions. The control strategy applied to the DSTATCOM play a major role in its performance. A novel approach based on an improved instantaneous active and reactive current component (IARCC) theory is proposed for generation of three-phase reference currents for DSTATCOM. A three-phase voltage source converter with a dc bus capacitor is employed as DSTACOM which will track the reference currents in a hysteresis band scheme. The performance of DSTATCOM is evaluated under sinusoidal, unbalanced sinusoidal and unbalanced distorted source voltage conditions. Variation in load current, variation in magnitude and harmonic content in source voltage has been considered. Delta connected linear as well as non-linear load conditions have been considered. The performance of the DSTATCOM using the proposed control strategy is demonstrated using simulation results in MATLAB/SIMULINK software. Simulation results demonstrate the feasibility of proposed scheme for the control of DSTACOM. © 2012 Elsevier Ltd. All rights reserved.

Kadam Y.,Veer Narmad South Gujarat University
Journal of Dispersion Science and Technology | Year: 2010

Clouding behavior of PEO-PPO-PEO and PPO-PEO-PPO block copolymers were studied in presence of sodium dodecyl sulfate (SDS) and NaCl. Extensive study of Pluronic P84 (EO19PO43EO19) with different salts and ionic surfactants, were carried out using cloud point, viscosity and dynamic light scattering (DLS) measurements. The change in cloud point, as well as the size of P84 micelles in aqueous salt solution obeys the Hofmeister lyotropic series. Results on P84-ionic surfactant mixture indicate stronger interaction in case of SDS compared to those in presence of dodecyl trimethylammonium chloride (DTAC); here interaction seems to diminish in the presence of salts. © Taylor & Francis Group, LLC.

Maniya K.D.,Veer Narmad South Gujarat University | Bhatt M.G.,Bhavnagar University
Computers and Industrial Engineering | Year: 2011

In the present work, a systematic and an alternative multiple attribute decision making methodology is presented for selection of facility layout design selection problems. The proposed methodology is based on Preference selection index (PSI) method. In the proposed methodology appropriate facility layout design is selected for a given application without considering relative importance between facility layout design selection attributes. Two different types of facility layout design selection problems are examined to demonstrate, validate, and to check the reliability of proposed methodology. In addition, subjective cost benefit analysis is performed to study the benefits to cost to the company. Finally, the study has concluded that the facility layout design selection methodology based on PSI method is simple, logical, and more appropriate for solving the facility layout design selection problems. © 2011 Elsevier Ltd. All rights reserved.

Patel D.R.,Veer Narmad South Gujarat University | Patel K.C.,Veer Narmad South Gujarat University
Dyes and Pigments | Year: 2011

The main target of this paper was to synthesize novel reactive dyes that not only give good dyeing property but also show pharmacological activity i.e. antimicrobial activity (antibacterial and antifungal). In this regard ten novel monoazo quinazolinone based reactive dyes (7a-j) were made by coupling of diazotised 3-{4-[4-amino-2-nitrobenzyl]-3-nitrophenyl}-7-chloro-2- phenylquinazolin-4(3H)-one (4) with various p-chloro anilino cyanurated coupling components (6a-j). The structures of all these synthesized dyes were confirmed by elemental analysis and spectral methods. The antimicrobial activity, colorimetric data, solvent effect and fastness properties of these dyes were also investigated. © 2010 Elsevier Ltd. All rights reserved.

Desai A.A.,Veer Narmad South Gujarat University
Pattern Recognition | Year: 2010

This paper deals with an optical character recognition (OCR) system for handwritten Gujarati numbers. One may find so much of work for Indian languages like Hindi, Kannada, Tamil, Bangala, Malayalam, Gurumukhi etc, but Gujarati is a language for which hardly any work is traceable especially for handwritten characters. Here in this work a neural network is proposed for Gujarati handwritten digits identification. A multi layered feed forward neural network is suggested for classification of digits. The features of Gujarati digits are abstracted by four different profiles of digits. Thinning and skew-correction are also done for preprocessing of handwritten numerals before their classification. This work has achieved approximately 82% of success rate for Gujarati handwritten digit identification. © 2010 Elsevier Ltd. All rights reserved.

Dharaiya N.,Veer Narmad South Gujarat University | Bahadur P.,Veer Narmad South Gujarat University
Colloids and Surfaces A: Physicochemical and Engineering Aspects | Year: 2012

Cloud point, viscosity and dynamic light scattering data on aqueous micellar solutions of a nonionic surfactant Triton X-100 in the presence of several phenolic solutes are reported. These additives alter the surfactant's solution behavior depending on their hydrophobicity and pH of the solution. α-Naphthol, p-cresol and phenol induced micellar growth whereas more hydrophilic catechol, quinol, resorcinol did not show any significant change in micelle size. Increase in p-cresol concentration, decrease in pH and increase in temperature favored micelle growth. NMR results show that at lower concentration (10. mM) p-cresol resides in the shell region while at higher concentration (40. mM) both in shell region and core/shell interface. Quinol resides at micelle-water interface even at high concentration (40. mM). © 2012 Elsevier B.V.

Revdiwala S.,Veer Narmad South Gujarat University | Rajdev B.M.,Veer Narmad South Gujarat University | Mulla S.,Veer Narmad South Gujarat University
Critical Care Research and Practice | Year: 2012

Background. Biofilms contaminate catheters, ventilators, and medical implants; they act as a source of disease for humans, animals, and plants. Aim. Critical care units of any healthcare institute follow various interventional strategies with use of medical devices for the management of critical cases. Bacteria contaminate medical devices and form biofilms. Material and Methods. The study was carried out on 100 positive bacteriological cultures of medical devices which were inserted in hospitalized patients. The bacterial isolates were processed as per microtitre plate. All the isolates were subjected to antibiotic susceptibility testing by VITEK 2 compact automated systems. Results. Out of the total 100 bacterial isolates tested, 88 of them were biofilm formers. A 16-20-hour incubation period was found to be optimum for biofilm development. 85 isolates were multidrug resistants and different mechanisms of bacterial drug resistance like ESBL, carbapenemase, and MRSA were found among isolates. Conclusion. Availability of nutrition in the form of glucose enhances the biofilm formation by bacteria. Time and availability of glucose are important factors for assessment of biofilm progress. It is an alarm for those who are associated with invasive procedures and indwelling medical devices especially in patients with low immunity. © 2012 Sangita Revdiwala et al.

Maniya K.,Veer Narmad South Gujarat University | Bhatt M.G.,Shantilal Shah Engineering College
Materials and Design | Year: 2010

The aim of the current study is to implement a novel tool to help the decision-maker for selection of a proper material that will meet all the requirements of the design engineers. Preference selection index (PSI) method is a novel tool to select best alternative from given alternatives without deciding relative importance between attributes. In the present study, three different types of material selection problems are examined. A validation and consistency test of preference selection index method is performed in present work by comparing results of PSI method with published results of graph theory and matrix approach (GTMA), and technique for order preference by similarity to ideal solution (TOPSIS) method, respectively. The research has concluded that the PSI method is logical and more appropriate for the material selection problems. © 2009 Elsevier Ltd. All rights reserved.

Maniya K.D.,Veer Narmad South Gujarat University | Bhatt M.G.,Bhavnagar University
International Journal of Production Research | Year: 2011

The objective of this research is to develop and implement a new methodology for multi-attribute selection of automated guided vehicle (AGV) for the material handling. The present paper proposes a modified grey relational analysis (M-GRA) method combined with analytical hierarchy approach (AHP). AHP method is used to assign the relative importance between AGV selection attributes and M-GRA method is applied to determine AGV selection utility index. A proposed AHP/M-GRA technique is more suitable for the decision-making in the presence of vagueness. The methodology is illustrated by means of an example. The study was followed by the validation and the sensitivity analysis of the AHP/M-GRA technique. The results of the study build confidence in suitability of AHP/M-GRA technique for selection of AGV alternatives. © 2011 Taylor & Francis.

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