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EERA: ENHANCED EFFICIENT ROUTING ALGORITHM FOR MOBILE SENSOR NETWORK
Hemalatha, S,Raj, E.George Dharma Prakash International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.9
A Mobile Sensor Network is widely used in real time applications. A critical need in Mobile Sensor Network is to achieve energy efficiency during routing as the sensor nodes have scarce energy resource. The nodes' mobility in MWSN poses a challenge to design an energy efficient routing protocol. Clustering helps to achieve energy efficiency by reducing the organization complexity overhead of the network which is proportional to the number of nodes in the network. This paper proposes"EERA: Energy Efficient Routing Algorithm for Mobile Sensor Network" is divided into five phases. 1, Cluster Formation 2.Cluster head and Transmission head selection 3.Path Establishment / Route discovery and 4,Data Transmission. Experimental Analysis has been done and is found that the proposed method performs better than the existing method with respect to four parameters.
S HEMALATHA,Lingaraju DUMPALA,B BALAKRISHNA 한국해운물류학회 2018 The Asian journal of shipping and Logistics Vol.34 No.2
In today’s competitive business environment, evaluation and analysis of service quality of service organizations is vital to further improve quality of providing service by the organizations. The present study focuses on the evaluation of service quality of container terminal operators as these organizations play a major role in increase of national economy. Service quality evaluation process makes use of SERVQUAL tool for service quality evaluation of container terminal operators. Customized questionnaire for 20 enablers of 5 dimensions of service quality are prepared and distributed to 25 customers of 12 container terminal operators in India. Weights of dimensions and enablers pertaining to service quality of container terminal operators are determined through Attribute Hierarchy Model (AHM) to avoid consistency check, present in standard AHP method. TOPSIS and GRP methods are implemented to evaluate service quality of container terminal operators and composite rank is arrived. Consistency in the ranking is observed in the ranking patterns obtained by the proposed methods.
La-doped ZnO nanoflower as photocatalyst for methylene blue dye degradation under UV irradiation
Hemalatha, P.,Karthick, S. N.,Hemalatha, K. V.,Yi, M.,Kim, H. J.,Alagar, M. Springer Science + Business Media 2016 Journal of materials science Materials in electron Vol.27 No.3
<P>Lanthanum doped ZnO flower-like structured nanoparticles were synthesized through microwave assisted sol-gel technique. X-ray diffraction, scanning electron microscopy, transmission electron microscopy analysis confirmed the size, structural morphology and successful compound formation of the samples. The band gap was calculated from Tauc's plot using UV-Vis spectroscopy data. Lanthanum doped ZnO nanoparticles were used for the photocatalytic degradation of methylene blue dye under UV light irradiation. Compared to pure ZnO sample, La-doped samples exhibited higher photocatalytic dye degradation under UV light irradiation with short time duration. Among the different amounts of dopant, 3 mol% La-doped ZnO nano rods showed the highest degradation with short time UV light irradiation (60 min). Other factors such as particle size, morphology and defects also affect the photocatalytic activity. In our study, the main factor that influence photocatalytic activity is the separation of photo induced electron-hole pair due to defects formation in the sample. The 3 mol% sample has the appropriate electron-hole separation due to defects compared to pure ZnO. The influence of defects on the photocatalytic activity of all samples has been revealed using photoluminescence spectroscopy analysis. Furthermore, the effect of various operational parameters such as photocatalyst quantity, dye concentration and dopant concentrations were also optimized.</P>
Selvam, S.,Balamuralitharan, B.,Karthick, S. N.,Hemalatha, K. V.,Prabakar, K.,Kim, Hee-Je The Royal Society of Chemistry 2016 Analytical methods Vol.8 No.44
<▼1><▼1><P>A self-powered supercapacitor based on a caffeine sensor electrode has been developed using an electrochemically deposited rGO/β-CD/MnO2 ternary composite with ionic liquid assistance.</P></▼1><▼2><P>A self-powered supercapacitor based on a caffeine sensor electrode has been developed using an electrochemically deposited rGO/β-CD/MnO2 ternary composite with ionic liquid assistance. This typical composite electrode was prepared from electrochemically reduced e-rGO followed by the addition of β-cyclodextrin and MnO2 from Mn(CH3COOH)2·4H2O on FTO surfaces. The composite material is indexed to the corresponding crystalline phase of MnO2 in the XRD investigation and Mn 3p, Mn 2p, C 1s, and O 1s signals were identified from XPS analysis. The cyclic voltammetry study reveals that the potential of the caffeine samples and the square wave voltammetry peak currents indicate an increasing trend for caffeine oxidation. The sensor expressed a sensitivity of 0.187 μA cm<SUP>2</SUP> μM<SUP>−1</SUP> with a linear range of 10–550 μM (<I>n</I> = 3.12). The corresponding supercapacitor also exhibited a specific capacitance of 352 F g<SUP>−1</SUP> and it showed a very good life time from a long term cyclic test. The proposed ternary composite electrodes may be suitable electrodes for self-powered sensor devices.</P></▼2></▼1>
Selvam, S.,Balamuralitharan, B.,Karthick, S. N.,Savariraj, A. Dennyson,Hemalatha, K. V.,Kim, Soo-Kyoung,Kim, Hee-Je The Royal Society of Chemistry 2015 Journal of Materials Chemistry A Vol.3 No.19
<▼1><P>A novel sulfated β-cyclodextrin/PVP/MnCO3 composite has been synthesized for a parallel-connected supercapacitor and dye-sensitized solar cell (counter electrode).</P></▼1><▼2><P>A novel sulfated β-cyclodextrin/PVP/MnCO3 composite has been synthesized for a parallel-connected supercapacitor and dye-sensitized solar cell (counter electrode). β-Cyclodextrin has sulfonated, thermally cross-linked with PVP, and incorporated with MnCO3 nanoparticles. The composite electrode exhibited 202.6 F g<SUP>−1</SUP> capacitance, 197.96 W h kg<SUP>−1</SUP> energy density, 5.57% <I>η</I> (DSSC) and 70% performance up to 200 °C with a [BMI][TFSI] electrolyte.</P></▼2>
Ganesh, M.,Aziz, A.S.,Ubaidulla, U.,Hemalatha, P.,Saravanakumar, A.,Ravikumar, R.,Peng, M.M.,Choi, E.Y.,Jang, H.T. THE KOREAN SOCIETY OF INDUSTRIAL AND ENGINEERING 2016 JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY -S Vol.39 No.-
<P>Novel silver nanoparticles-decorated chitosan (CS)-polyvinyl alcohol (PVA) composite electrospun nanofibers, loaded with sulfanilamide for enhanced wound healing have been developed. Herein, formic acid was used as a reducing agent to produce in situ colloidal silver nanoparticles (AgNPs) in the composite polymeric solution with the active agent sulfanilamide. The prepared electrospun fibers were characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction, ultraviolet spectroscopy, and thermal gravimetric analysis (TG). Further, in vitro release, antimicrobial properties and in vivo wound healing activity were evaluated. The results revealed that the composite fibers displayed a synergistic antibacterial and wound healing activities. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.</P>
Dejene Minilu,Palnivel Hemalatha,Senthamarai Heeravathi,Varadharajan Venkatramanan,Prabhu S. Venkatesa,Yeshitila Alazar,Benor Solomon,Shah Shipra 한국응용생명화학회 2023 Applied Biological Chemistry (Appl Biol Chem) Vol.66 No.-
Gesho (Rhamnus prinoides) is a medicinal plant with antioxidant and anti-inflammatory activities commonly used in the ethnomedicinal systems of Africa. Using a three-layer neural network, four culture conditions viz., concentration of agar, duration of light exposure, temperature of culture, and relative humidity were used to calculate the callus differentiation rate of gesho. With the ability to quickly identify optimal solutions using high-speed computers, synthetic neural networks have emerged as a rapid, reliable, and accurate fitting technique. They also have the self-directed learning capability that is essential for accurate prediction. The network's final architecture for four selected variables and its performance has been confirmed with high correlation coefficient (R2, 0.9984) between the predicted and actual outputs and the root-mean-square error of 0.0249, were developed after ten-fold cross validation as the training function. In vitro research had been conducted using the genetic algorithm’s suggestions for the optimal culture conditions. The outcomes demonstrated that the actual gesho differentiation rate was 93.87%, which was just 1.86% lesser than the genetic algorithm's predicted value. The projected induced differentiation rate was 87.62%, the actual value was 84.79%, and the predicted value was 2.83% higher than Response Surface Methods optimisation. The environment for the growth of plant tissue can be accurately and efficiently optimised using a genetic algorithm and an artificial neural network. Further biological investigations will presumably utilise this technology.
Dhandapani, C.,Narayanasamy, R.,Karthick, S.N.,Hemalatha, K.V.,Selvam, S.,Hemalatha, P.,kumar, M. Suresh,Kirupha, S. Dinesh,Kim, Hee-Je Elsevier 2016 OPTIK -STUTTGART- Vol.127 No.22
<P><B>Abstract</B></P> <P>Nanocrystalline ZrO<SUB>2</SUB> and neodymium doped ZrO<SUB>2</SUB> (Nd–ZrO<SUB>2</SUB>) were successfully prepared by a polymer- assisted, sol-gel method and characterized by XRD, SEM, HRTEM, XPS and UV–vis techniques. X-Ray diffraction studies revealed the formation of highly crystalline structures of ZrO<SUB>2</SUB> and (Nd–ZrO<SUB>2</SUB>) samples. SEM images proved the evenly distributed nano - structured, spherically - shaped ZrO<SUB>2</SUB> particles of size 40nm, which was reduced to 20nm, when doped with neodymium. Light absorption properties of the nanoparticles were studied by UV–vis spectrophotometer. Nd - doped ZrO<SUB>2</SUB> was having a band gap of 2.8ev, while that of ZrO<SUB>2</SUB>, was 2.6ev. Thus, Nd substituted ZrO<SUB>2</SUB> effected substantial shifting of the absorption edge of zirconium oxide to red and resulting in the enhancement of visible light absorption The increase in band gap of Nd–ZrO<SUB>2</SUB> was resulted in an increasing light absorbtion tendency of Nd−ZrO<SUB>2</SUB>, which promoted the photocatalytic efficiency of it. XPS results confirmed substitution of Nd in ZrO<SUB>2</SUB>. Photocatalytic results for the degradation of methylene blue had indicated the fact that neodymium substitution dramatically enhanced the catalytic activity of zirconium oxide. This means that the neodymium − substituted zirconium oxide has the highest photocatalytic activity under visible light irradiation.</P>
Hemalatha Parangusan,Jolly Bhadra,Zubair Ahmad,Ali S. M A Al-Maadeed,Abdulaziz M. A A Al-Mohannadi,Noora Al-Thani 한국섬유공학회 2022 Fibers and polymers Vol.23 No.5
Clean drinking water has been a vital topic of research in modern world, this makes efficient water purification asthe latest demand. The research and development in the field of filtration technology has revitalize considerable awareness indifferent engineered methods and nanomaterials. In this work, a hydrophobic composite fibers was successfully prepared byincorporating ZnO nanofiller into polyvinylidene fluoride (PVDF) using an electrospinning method for organic dyedegradation and oil absorption applications. The hydrothermal method was used to prepare pure ZnO. The structuralproperties of PVDF/ZnO composite fibers and pure ZnO were studied using the X-ray diffraction technique (XRD). TheSEM image of pure ZnO shows a flower-like structure and the composites exhibited the structure of the fibers. The averagefiber diameter of the pure PVDF fiber was around 625 nm and the PVDF/ZnO composite fiber was around 485 nm,respectively. Finally, the prepared fibers were tested for oil absorption and the photocatalytic degradation of organic dyes. The photocatalytic activity of PVDF/ZnO was evaluated by the degradation of Azocarmine G (AZG) and Malachite green(MG) dye under sunlight irradiation. The results showed that 85 % of AZG and 90 % of MG dye could be degraded within120 min and 240 min. It was found that the PVDF/ZnO composite fiber was hydrophobic (135 °) under water. Good oilabsorption efficiency (115 %) was achieved using PVDF/ZnO composite fibers. The results shows that the preparedcomposite fibers can be used to absorb oil and degrade organic contaminants. This cost-effective, easy operation, reusability,and efficiency of the PVDF/ZnO fiber mats could be potentially useful for water treatment and oil recovery.