Zinc Metal Solubilization by Gluconacetobacter diazotrophicus and Induction of Pleomorphic Cells

( Saravanan ),( Venkatakrishnan Sivaraj ),( Jabez Osborne ),( Munusamy Madhaiyan ),( Lazar Mathew ),( Jong Bae Chung ),( Ki Sup Ahn ),( Tong Min Sa ) 한국미생물생명공학회 2007 Journal of microbiology and biotechnology Vol.17 No.9

A Simple Power Management Scheme with Enhanced Stability for a Solar PV/Wind/Fuel Cell Fed Standalone Hybrid Power Supply using Embedded and Neural Network Controller

Saravanan Subramanian,Thangavel Subbaiyan 대한전기학회 2014 Journal of Electrical Engineering & Technology Vol.9 No.5

This paper propose a new power conditioner topology with intelligent power management controller that integrates multiple renewable energy sources such as solar energy, wind energy and fuel cell energy with battery backup to make best use of their operating characteristics and obtain better reliability than that could be obtained by single renewable energy based power supply. The proposed embedded controller is programmed for maintaining a constant voltage at PCC, maximum power point tracking for solar PV panel and WTG and power flow control by regulating the reference currents of the controller on instantaneous basis based on the power delivered by the sources and load demand. Instantaneous variation in reference currents of the controller enhances the controller response as it accommodates the effect of continuously varying solar insolation and wind speed in the power management. The power conditioner uses a battery bank with embedded controller based online SOC estimation and battery charging system to suitably sink or source the input power based on the load demand. The simulation results of the proposed power management system for a standalone solar/WTG/ fuel cell fed hybrid power supply with real time solar radiation and wind velocity data collected from solar centre, KEC for a sporadically varying load demand is presented in this paper and the results are encouraging in reliability and stability perspective.

Gear Box Fault Diagnosis using Hilbert Transform and Study on Classification of Features by Support Vector Machine

Saravanan Natarajan 보안공학연구지원센터 2014 International Journal of Hybrid Information Techno Vol.7 No.4

My Life in Korea

Saravanan Prabhu Nadarajan 한국생물공학회 2014 BT NEWS Vol.21 No.2

Psychological Problems and Psychosocial Predictors of Cigarette Smoking Behavior among Undergraduate Students in Malaysia

Saravanan, Coumaravelou,Heidhy, Imran Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.18

Background: Cigarette smokers have their own motivation and justification to smoke. For example, smoking reduces their stress or enhances their pleasure. This study aimed to identify the (a) prevalence of cigarette smokers among undergraduates in Malaysia, (b) gender differences in nicotine dependence among current smokers, (c) differences in psychological problems (depression, anxiety and stress) based on the status of smoking cigarettes (current, former and non-smokers) and (d) extent to which precipitating factors (tension reduction, addiction, automatism, handling, social interaction, pleasure, and stimulation) predict the smoking behavior among current smokers. Materials and Methods: In this study 780 undergraduate students participated from a private university in Kuala Lumpur and Selangor state in Malaysia. The Depression, Stress and Anxiety Scale, Modified Reason for Smoking Scale and Fagerstrom Nicotine Dependence Test were used to measure psychological problems, predictors of smoking behavior and nicotine dependency among current smokers. Results: The results showed that 14.7%(n=106) of the students were smokers. Current smokers exhibited more psychological problems (depression, anxiety and stress) compared to former and non-smokers. Addiction, tension reduction, pleasure and automatism were predictors of smoking behavior among the current smoking students. Step wise regression analysis showed that smoking behavior was highly predicted by nicotine dependency or addiction. Smoking students were motivated to smoke cigarettes as they believed that it reduced their tension and enhance pleasure. Conclusions: Hence, there is a need for health promotion and anti-tobacco prevention as cigarette smokers experience more psychological problems. Nicotine dependency or addition was one of the major causes for smoking behavior among the student population in Malaysia.

Combined effects of magnetic and electric fields on the interband optical transitions in InAs/InP quantum wire

Saravanan, S.,John Peter, A.,Lee, ChangWoo Elsevier 2015 Physica E, Low-dimensional systems & nanostructure Vol.67 No.-

<P><B>Abstract</B></P> <P>Combined effects of magnetic and electric fields on the confined exciton in an InAs<SUB>1−<I>x</I> </SUB>P<I> <SUB>x</SUB> </I>/InP (<I>x</I>=0.2) quantum well wire are investigated taking into account the geometrical confinement effect. Variational formulism, within the frame work of effective mass approximation, is applied to obtain the exciton binding energy. The second order harmonic generation and the optical gain are carried out using compact density method. The strain effects are included with the confinement potential in the Hamiltonian. The energy difference of the ground and the first excited state is found in the presence of magnetic and electric fields taking into the consideration of spatial confinement effect. The result shows that the optical properties are more influenced taking into account the effects of geometrical confinement, magnetic field and electric field. It is shown that the telecommunication wavelength can be achieved with the suitable doping barrier material with the wire material and the external perturbations.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Combined effects of magnetic and electric fields on the confined exciton in an InAs<SUB>1−<I>x</I> </SUB>P<I> <SUB>x</SUB> </I>/InP wire are investigated. </LI> <LI> Variational formulism is applied to obtain the exciton binding energy. </LI> <LI> Second order harmonic generation and the optical gain are carried out using compact density method. </LI> <LI> The strain effects are included with the confinement potential in the Hamiltonian. </LI> <LI> Optical properties are more influenced with the effects of geometrical confinement and the external perturbations. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Variation of gain as a function of photon energy for various values of measure of magnetic field strength in a InAs<SUB>0.8</SUB>P<SUB>0.2</SUB>/InP quantum well wire is shown for <I>F</I>=0V/cm and <I>F</I>=100V/cm, with the constant electron density. The wire radius is taken as 50Å.</P> <P>[DISPLAY OMISSION]</P>

Effectual binding of gallic acid with p-sulfonatocalix[4]arene: An experimental and theoretical interpretation

Saravanan, Chokalingam,Chitumalla, Ramesh Kumar,Ashwin, Bosco Christin Maria Arputham,Senthilkumaran, Marimuthu,Suresh, Palaniswamy,Jang, Joonkyung,Muthu Mareeswaran, Paulpandian Elsevier 2018 Journal of luminescence Vol.196 No.-

<P><B>Abstract</B></P> <P>The host-guest interaction of gallic acid (GA) with p-sulfonatocalix[4]arene (p-SC4) is studied using emission and excited state lifetime techniques. The quenching effect on the emission intensity and excited state lifetime is observed upon binding. The impact of oxidation potential upon binding is studied using cyclic voltammetric technique. The structural features and the mode of binding of GA with p-SC4 is examined using <SUP>1</SUP>H NMR and rotating frame overhauser effect spectroscopy (ROESY) techniques. The binding of GA with p-SC4 has also been examined by means of density functional theory simulations. The calculated interaction energy of GA with p-SC4 (22.15kcal/mol) indicates the strong binding nature.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Formation of stable complex between GA and p-SC4 is studied in solution state. </LI> <LI> Quenching on emission intensity and lifetime of GA is observed upon addition of p-SC4. </LI> <LI> The downward potential shift is detected upon addition of GA on p-SC4 and vice versa. </LI> <LI> The <SUP>1</SUP>H NMR and ROESY spectral studies reveals that the GA is included into p-SC4. </LI> <LI> The theoretical simulations explains the intermolecular hydrogen bonding interactions between the GA and the p-SC4. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Synthesis of Isochroman and Tetrahydroisoquinoline Derivatives from Baylis-Hillman Adducts by Radical Cyclization

Saravanan Gowrisankar,Hyun Seung Lee,김재녕 대한화학회 2007 Bulletin of the Korean Chemical Society Vol.28 No.12

An Exploratory Study of Cloud Service Level Agreements - State of the Art Review

( Saravanan K ),( Rajaram M ) 한국인터넷정보학회 2015 KSII Transactions on Internet and Information Syst Vol.9 No.3

Cloud computing evolve as a cost effective business model for IT companies to focus on their core business without perturbing on infrastructure related issues. Hence, major IT firms and Small & Medium Enterprises (SME) are adopting cloud services on rental basis from cloud providers. Cloud Service level agreements (SLA) act as a key liaison between consumers and providers on renting Anything as a Service (AaaS). Design of such an agreement must aim for greater profit to providers as well as assured availability of services to consumers. However in reality, cloud SLA is not satisfying the parties involved because of its inherent complex nature and issues. Also currently most of the agreements are unilateral to favour the provider. This study focuses on comprehensive, 360-degree survey on different aspects of the cloud service agreements. We detailed the life cycle of SLA based on negotiation, different types of SLA, current standards, languages & characteristics, metrics and issues involved in it. This study will help the cloud actors to understand and evaluate the agreements and to make firm decision on negotiation. The need for standardized, bilateral, semantic SLA has also been proposed.

Social Roles and Birthing Practices of Traditional Birth Attendants in India with reference to other Developing Countries

Saravanan, Sheela,Johnson, Helen,Turrell, Gavin,Fraser, Jennifer Ewha Womans University Press 2009 Asian Journal of Women's Studies(AJWS) Vol.15 No.4

Pregnancy and childbirth complications are a leading cause of death and disability among women of reproductive age in developing countries. The high maternal and infant mortality rates and low uptake of antenatal and postnatal care have been topics of deliberation for researchers in the fields of medicine, public health, anthropology and sociology. Worldwide data show that, by choice or out of necessity, 47 percent of births in the developing world are assisted by Traditional Birth Attendants (TBAs) and/or family members. Since the 1970s the training of TBAs has been one of the primary single interventions undertaken by funding agencies, who assume that maternal and perinatal mortality in developing countries is high because many women deliver babies at home, assisted by TBAs or relatives. However, since the 1990s, the TBA training strategy has been increasingly seen as irrelevant, ineffective or a failure, given the evidence that the maternal mortality rate (MMR) in developing countries did not reduce. Hence, many donor agencies providing funding for TBA training in developing countries have withdrawn funds, reallocating them to providing skilled attendants during delivery. Researchers have expressed concern that a shift in policy has taken place without adequate evidence about the relevance and effectiveness of the TBA training program. The objective of this paper is to review research evidence from India and other developing countries on the relevance of TBAs by assessing their contribution to providing maternal and infant health care service at different stages of pregnancy, during and after delivery; outcomes of training; and birthing practices adopted by them in home births. This review reveals that TBAs acquire knowledge of the birth process through experience, which they bring to their practice and which they use to explain events in their local context. Certain harmful TBA practices have changed and others have been introduced into the community through training. An appropriate understanding of useful and harmful local practices in communities is therefore important background information that trainers need to know before conducting training programs in a particular area. Certain redundant birthing practices such as discarding colostrum, bathing babies immediately after birth, using unhygienic material to cut and apply on the cord and delayed weighing of babies continue to be practiced not only in home births but also in health institutions in India. This review article highlights the importance of training to improve TBAs’ knowledge, together with community awareness programs. Potentially detrimental cultural beliefs need to be addressed too, when TBA training programs are initiated in order to improve maternal and child health outcomes.