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Excellent photoluminescence and electrochemical properties of sm^(3+) doped Ca_(2)Mgsi_(2)O_(7) nanophosphor:Display and electrochemical sensor applications

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Journal of Rare Earths 2024年第6期42卷 1046-1055,I0002页

作者： R.B.Basavaraj k.sureshkumar D.P.Aarti M.B.Madhusudana Reddy G.Nagaraju T.Ramakrishnappa G.R.Navyashree k.R.Venkatesha Babu k.s.hemalatha Department of Physics BMS Institute of Technology and ManagementBangalore560064India Department of Chemistry BMS Institute of Technology and ManagementBangalore560064India Department of Chemistry School of Applied SciencesREVA UniversityBangalore560064India Energy Materials ResearchLaboratory Department of ChemistrySiddaganga Institute of TechnologyTumakuru57203KarnatakaIndia school of Physical sciences REVA UniversityBangalore560057Indi Department of Physics Govt.Science CollegeBengaluru560001India Department of Physics Maharani Science College for WomenMaharani Cluster UniversityBengaluru560001India

A series of orange-red light emitting Ca_(2)Mgsi_(2)O_(7):sm^(3+)nanopowders were fabricated via low-cost ecofriendly green combustion technique using Aloe vera gel as *** phase purity of the samples were confirmed by the powder X-ray diffraction(PXRD)*** single-phase tetragonal structure is observed from the PXRD results with no additional impurity *** band gap energy of the fabricated powders was estimated by diffuse reflectance spectra(DRs)and is found to be in the range of 4.01-5.98 eV.A high resolution scanning electron microscope(sEM)was used to study the morphological behaviour of the ***-like structures are observed from the sEM *** particle size was evaluated by transmission electron microscopy(TEM)and is found to be~50 *** interplanar distance is found to be 0.53 *** properties were systematically studied in *** phosphors are successfully excited at 403 nm NUV light,producing reddish-orange characteristic *** emission peaks are centered at 558(^(4)G_(5/2)→^(6)H_(5/2)),607(^(4)G_(5/2)→^(6)H_(7/2))and 645 nm(^(4)G_(5/2)→^(6)H_(9/2)),*** the observed peaks the red emanation(^(4)G_(5/2)→^(6)H_(7/2))is stronger than the orange emission(^(4)G_(5/2)→^(6)H_(5/2))in the current *** photoluminescent concentration quenching is noticed above 5 mol%sm^(3+)ion doping *** dipole-dipole interaction resulting in cross relaxation is found to be the principal cause of concentration quenching *** color features such as Commission Internationale de I’Eclairage(CIE)and correlated color temperature(CCT)were studied in *** optimized chromaticity coordinates were estimated to be(0.6363,0.3632),which fall in the reddish-orange *** average CCT value obtained is 3362 *** average color purity is found to be~82%.sm^(3+)incorporated Ca_(2)Mgsi_(2)O_(7) samples are possible contender for single white light generation commercial candidates owing to

关键词： Green combustion Photoluminescence Orange-red emission Color purity sensors Rare earths

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Harmonics Extraction scheme for Power Quality Improvement Using Chbmli-Dstatcom Module

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Intelligent Automation & soft Computing 2023年第2期35卷 1505-1525页

作者： R.hemalatha M.Ramasamy Anna University ChennaiTamil NaduIndia k.s.R.College of Engineering TiruchengodeTamil NaduIndia

In recent day’s power distribution system is distress from acute power quality *** this work,for compensating Power Quality(PQ)disturbances a seven level cascaded H-bridge inverter is implemented in distribution static com-pensator which protects power quality problems in *** static Compensator(DsTATCOM)aid to enhances power factor and removes total har-monic distortion which is drawn from non-linear *** D–Q reference theory based hysteresis current controller is employed to generate reference current for compensation of harmonics and reactive power,additionally Probabilistic Neural Network(PNN)classiﬁer is used which easily separates exact *** the meantime fuzzy logic controller is also used to maintain capacitor DC-link *** comparing to PI controller it decreases steady state time and reduces maximum peak *** H-bridge multilevel inverter converts direct current to Alternating current,through inductor opposite harmonics are injected in Power Control Centre reduces source current harmonics and reactive *** implementation of CHBMLI in distribution sTATic COMpensator simulation model is simulated by means of MATLAB.

关键词： CHBMLI distribution sTATic COMpensator(DsTATCOM) probabilistic neural network(PNN) PI(proportional–integral) fuzzy logic control(FLC) total harmonic distortion(THD)

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Unveiling the redox electrochemistry of 1D,urchin-like vanadium sulfide electrodes for high-performance hybrid supercapacitors

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Journal of Energy Chemistry 2023年第4期79卷 569-580页

作者： k.karuppasamy Dhanasekaran Vikraman sajjad Hussain Balamurugan Thirumalraj P.santhoshkumar hemalatha Parangusan Hyun-Chang Park Jongwan Jung Hyun-seok kim Division of Electronics and Electrical Engineering Dongguk University-SeoulSeoul 04620Republic of Korea Department of Nanotechnology and Advanced Materials Engineering Sejong UniversitySeoul 05006Republic of Korea school of Materials science&Engineering Kookmin UniversitySeoul 02707Republic of Korea Millimeter-Wave Innovation Technology Research Center(MINT) Dongguk University-SeoulSeoul 04620Republic of Korea Qatar University Young scientist Center(QUYsC) Qatar UniversityP.O.Box 2713DohaQatar

Exploring novel versatile electrode materials with outstanding electrochemical performance is the key to the development of advanced energy conversion and storage *** this work,we aim to construct new-fangled one-dimensional(1D)quasi-layered patronite vanadium tetrasulfide(Vs_(4))nanostructures by using different sulfur sources,namely thiourea,thioacetamide,and L-cysteine through an ethyleneaminetetraacetic-acid(EDTA)-mediated solvothermal *** as-prepared Vs4exhibits several unique morphologies such as urchin,fluffy nanoflower,and polyhedron with appropriate surface *** the prepared nanostructures,the Vs_(4)-1@NF nanostructure exhibited excellent electrochemical properties in 6 M kOH solution,and we explored its redox electrochemistry in *** asprepared Vs_(4)-1@NF electrode exhibited battery-type redox characteristics with the highest capacity of280 C g^(-1)in a three-electrode ***,it offered a capacity of 123 F g^(-1)in a hybrid twoelectrode set-up at 1 A g^(-1)with the highest specific energy and specific power of 38.5 W h kg^(-1)and750 W kg^(-1),***,to ensure the practical applicability and real-world performance of the prepared hybrid AC@NF//Vs_(4)-1@NF cell,we performed a cycling stability test with more than 5,000galvanostatic charge–discharge cycles at 2 A g^(-1),and the cell retained around 84.7%of its capacitance even after 5,000 cycles with a CE of 96.1%.

关键词： Patronite Redox electrochemistry Urchin Vs_(4) 1D material Mesoporous

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Leveraging Multimodal Ensemble Fusion-Based Deep Learning for COVID-19 on Chest Radiographs

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Computer systems science & Engineering 2023年第10期47卷 873-889页

作者： Mohamed Yacin sikkandar k.hemalatha M.subashree s.srinivasan seifedine kadry Jungeun kim keejun Han Department of Medical Equipment Technology College of Applied Medical SciencesMajmaah UniversityAl Majmaah11952Saudi Arabia Department of Biomedical Engineering Bannari Amman Institute of TechnologySathyamangalam638401India Department of Computer science and Engineering K.Ramakrishnan College of EngineeringTiruchirappalli621112India Institute of Biomedical Engineering Saveetha School of EngineeringSaveetha Institute of Medical and Technical SciencesSaveetha UniversityChennai602105India Department of Applied Data science Noroff University CollegeKristiansandNorway Artificial Intelligence Research Center(AIRC) College of Engineering and Information TechnologyAjman UniversityAjmanUnited Arab Emirates Department of Electrical and Computer Engineering Lebanese American UniversityByblosLebanon Department of software Kongju National UniversityCheonan31080Korea Division of Computer Engineering Hansung UniversitySeoul02876Korea

Recently,COVID-19 has posed a challenging threat to researchers,scientists,healthcare professionals,and administrations over the globe,from its diagnosis to its *** researchers are making persistent efforts to derive probable solutions formanaging the pandemic in their *** of the widespread and effective ways to detect COVID-19 is to utilize radiological images comprising X-rays and computed tomography(CT)*** the same time,the recent advances in machine learning(ML)and deep learning(DL)models show promising results in medical ***,the convolutional neural network(CNN)model can be applied to identifying abnormalities on chest *** the epidemic of COVID-19,much research is led on processing the data compared with DL techniques,particularly *** study develops an improved fruit fly optimization with a deep learning-enabled fusion(IFFO-DLEF)model for COVID-19 detection and *** major intention of the IFFO-DLEF model is to investigate the presence or absence of *** do so,the presented IFFODLEF model applies image pre-processing at the initial *** addition,the ensemble of three DL models such as DenseNet169,EfficientNet,and ResNet50,are used for feature ***,the IFFO algorithm with a multilayer perceptron(MLP)classification model is utilized to identify and classify *** parameter optimization of the MLP approach utilizing the IFFO technique helps in accomplishing enhanced classification *** experimental result analysis of the IFFO-DLEF model carried out on the CXR image database portrayed the better performance of the presented IFFO-DLEF model over recent approaches.

关键词： COVID-19 computer vision deep learning image classification fusion model

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Faster Region Based Convolutional Neural Network for skin Lesion segmentation

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Intelligent Automation & soft Computing 2023年第5期36卷 2099-2109页

作者： G.Murugesan J.Jeyapriya M.hemalatha s.Rajeshkannan Department of Computer science and Engineering St.Joseph’s College of EngineeringChennaiTamil NaduIndia Department of Computer science and Engineering B.S.Abdur Rahman Crescent Institute of Science and TechnologyChennaiTamil NaduIndia Department of Artificial Intelligence and Data science Saveetha Engineering College(Autonomous)ChennaiTamil NaduIndia Department of Electronics and Communication Engineering St.Joseph’s College of EngineeringChennaiTamil NaduIndia

The diagnostic interpretation of dermoscopic images is a complex task as it is very difﬁcult to identify the skin lesions from the *** the accurate detection of potential abnormalities is required for patient monitoring and effec-tive *** this work,a Two-Tier segmentation(TTs)system is designed,which combines the unsupervised and supervised techniques for skin lesion *** comprises preprocessing by the medianﬁlter,TTs by Colour k-Means Clustering(CkMC)for initial segmentation and Faster Region based Con-volutional Neural Network(FR-CNN)for reﬁned *** CkMC approach is evaluated using the different number of clusters(k=3,5,7,and 9).An inception network with batch normalization is employed to segment mel-anoma regions *** loss functions such as Mean Absolute Error(MAE),Cross Entropy Loss(CEL),and Dice Loss(DL)are utilized for perfor-mance evaluation of the TTs *** anchor box technique is employed to detect the melanoma region *** TTs system is evaluated using 200 dermoscopic images from the PH2 *** segmentation accuracies are analyzed in terms of Pixel Accuracy(PA)and Jaccard Index(JI).Results show that the TTs system has 90.19%PA with 0.8048 JI for skin lesion segmentation using DL in FR-CNN with seven clusters in CkMC than CEL and MAE.

关键词： skin cancer melanoma diagnosis clustering convolution neural network unsupervised segmentation deep learning

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Design of Qos Aware Routing Protocol for IoT Assisted Clustered WsN

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Computers, Materials & Continua 2022年第5期71卷 3785-3801页

作者： Ashit kumar Dutta s.srinivasan Bobbili Prasada Rao B.hemalatha Irina V.Pustokhina Denis A.Pustokhin Gyanendra Prasad Joshi Department of Computer science and Information systems College of Applied SciencesAlmaarefa UniversityRiyadh13713Kingdom of Saudi Arabia saveetha school of Engineering Saveetha Institute of Medical and Technical SciencesSaveetha NagarThandalamChennai602105India Department of Electrical and Electronics Engineering Vignan’s Institute of Information TechnologyVisakhapatnam530049India Department of Electronics and Communication Engineering Thirumalai Engineering CollegeKancheepuram631551India Department of Entrepreneurship and Logistics Plekhanov Russian University of Economics117997MoscowRussia Department of Logistics State University of Management109542MoscowRussia Department of Computer science and Engineering Sejong UniversitySeoul05006Korea

In current days,the domain of Internet of Things(IoT)and Wireless sensor Networks(WsN)are combined for enhancing the sensor related data transmission in the forthcoming networking *** and routing techniques are treated as the effective methods highly used to attain reduced energy consumption and lengthen the lifetime of the WsN assisted IoT *** this view,this paper presents an Ensemble of Metaheuristic Optimization based Qos aware Clustering with Multihop Routing(EMOQosCMR)Protocol for IoT assisted *** proposed EMO-QosCMR protocol aims to achieve Qos parameters such as energy,throughput,delay,and *** proposed model involves two stage processes namely clustering and ***,the EMO-QosCMR protocol involves crossentropy rain optimization algorithm based clustering(CEROAC)technique to select an optimal set of cluster heads(CHs)and construct ***,oppositional chaos game optimization based routing(OCGOR)technique is employed for the optimal set of routes in the IoT assisted *** proposed model derives a fitness function based on the parameters involved in the IoT nodes such as residual energy,distance to sink node,*** proposed EMOQosCMR technique has resulted to an enhanced NAN of 64 nodes whereas the LEACH,PsO-ECHs,E-OEERP,and iCsHs methods have resulted in a lesser NAN of 2,10,42,and 51 *** performance of the presented protocol has been evaluated interms of energy efficiency and network lifetime.

关键词： Internet of things wireless sensor networks clustering routing metaheuristics cluster head selection Qos parameters

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Pharmacologically tested aldose reductase inhibitors isolated from plant sources—A concise report

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中国天然药物 2012年第5期10卷 388-400页

作者： D. k. Patel R. kumar k. sairam s. hemalatha Pharmacognosy Research Laboratory Department of Pharmaceutics Institute of Technology Banaras Hindu University

Aldose reductase (AR), a cytosolic, monomeric oxidoreductase, is a key enzyme in the polyol pathway which controls the conversion of glucose to sorbitol. The accumulation of sorbitol by the activation of AR enzymes in lens, retina, and sciatic nerves leads to the cause of diabetic defects resulting in various secondary complications, viz. retinopathy, neuropathy, nephropathy and Alzheimer's disease. Thus, reduction of the polyol pathway flux by AR inhibitors could be a potential therapeutic opening in the treatment and prevention of diabetic complications. At present, the AR inhibitors belong to two different chemical classes. One is the hydantoin derivatives, such as sorbinil, Dilantin, and Minalrestat, and the other is the carboxylic acid derivatives, such as Epalrestat, Alrestatin, and Tolrestat. However, it is known that most of these synthethic compounds have unacceptable side-effects. Well known medicinal plants like Chrysanthemum indicum, Chrysanthemum morifolium, Prunus mume, Myrcia multiflora, Centella asiatica, and salacia reticulata, salacia oblonga, and salacia chinensis exhibited potent AR inhibitory activity. The present review summarizes the list of plant material, and their isolated phytoconstituents which have been tested for their AR inhibitory activity. This litreature review covers the period to 2011, and a total of 72 plants are listed.

关键词： Aldose reductase Cataracts Enzyme Human recombinant AR Medicinal plants Phytoconstituents Polyol pathway Rat lens AR Rat lens

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Antidiabetic and in vitro antioxidant potential of Hybanthus enneaspermus(Linn) *** in streptozotocin—induced diabetic rats

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Asian Pacific Journal of Tropical Biomedicine 2011年第4期1卷 316-322页

作者： Patel Dk kumar R Prasad sk sairam k hemalatha s Pharmacognosy Research Laboratory Department of PharmaceuticsInstitute of TechnologyBanaras Hindu University

Objective:To evaluate antidiabetic and antioxidant potential of Hybanthus enneaspermus in different ***:The oral glucose tolerance test(OGTT) and normoglycemic effect of alcoholic extract of Hybanthus enneaspermus(AHE) were evaluated at a dose of 125,250 and 500mg/kg *** hypoglycemic activity and effect on body weight were tested at 250 and 500 mg/kg *** day for 21 days in streptozotocin(sTZ) induced diabetic ***,glucose uptake by hemidiaphram was also *** total polyphenolic and flavonoid were determined and their correlation with various antioxidant assays was also ***:The results showed high level of phenolic content in *** also exhibited higher total antioxidant capacity,good reducing power and a significant scavenger of reactive oxygen species like DPPH radical,nitric oxide,hydrogen peroxide and *** there was a significant increase in the body weight and decrease in the blood glucose level on treatment with the *** increased glucose uptake on isolated rat hemi-diaphragm compared to control ***:AHE reduce blood glucose level in sTZ-induced diabetic *** does not show significant effect in normoglycemic study but showes significant effect in *** has significant antioxidant activity,which may be attributed to high phenolic content.

关键词： Hybanthus enneaspermus Diabetic Antioxidant Total phenol Flavonoid Flavonol Glucose uptake

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Evaluation of in vitro aldose reductase inhibitory potential of different fraction of Hybanthus enneaspermus Linn ***

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Asian Pacific Journal of Tropical Biomedicine 2012年第2期2卷 134-139页

作者： Patel Dk kumar R kumar M sairarn k hemalatha s Pharmacognosy Research Laboratory Department of PharmaceuticsInstitute of TechnologyBanaras Hindu University

Objective:To evaluate the aldose reductase inhibitory(ARI)activity of different fractions of Hybanthus enneaspermus for potential use in diabetic ***:Total phenol and flavonoid content of different fractions was *** activity of different fractions in rat lens was investigated in ***:The results showed significant level of phenolic and flavonoid content in ethyl acetate fraction[total phenol(212.15±0.79 mg/g),total flavonoid(39.11±2.27mg/g)]and aqueous fraction[total phenol(140.62±0.57mg/g),total flavonoid(26.07±1.49 mg/g)]as compared with the chloroform fraction[total phenol(68.56±0.51mg/g),total flavonoid(13.41±0.82mg/g)]and petrolium ether fraction[total phenol(36.68±0.43mg/g),total flavonoid(11.55±1.06mg/g)].There was a significant difference in the ARI activity of each fraction,and it was found to be the highest in ethyl acetate fraction[IC_(50)(49.26±1.76μg/mL)]followed by aqueous extract[IC_(50)(70.83±2.82μg/mL)]and it was least in the petroleum ether fraction[IC_(50)(118.89±0.71μg/mL)].Chloroform fraction showed moderate activity[IC_(50)(98.52±1.80μg/mL)].Conclusions:Different fractions showed significanct amount of ARI activity,where in ethyl acetate fraction it was found to be maximum which may be due to its high phenolic and flavonoid *** extract after further evaluation may be used in the treatment of diabetic cataract.

关键词： Hybanthus enneaspermus Total phenol Total flavonoid Rat lens Aldose reductase Diabetic cataract Different fractions

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Elevation of gene expression of calcineurin,calmodulin and calsyntenin in oxidative stress induced PC12 cells

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Genes & Diseases 2021年第1期8卷 87-93页

作者： P.Aravind sarojini R.Bulbule N.hemalatha R.L.Babu k.s.Devaraju Department of Biochemistry Karnatak UniversityPavate NagarDharwad580003India Department of Biochemistry and Nutrition CFTRIV V MohollaMysore570020India Department of Bioinformatics and Biotechnology Akkamahadevi Women’s UniversityVijayapuraKarnataka586108India

In normal physiological conditions,reactive oxygen and nitrogen species are used as important signaling molecules in the ***,in excess it causes the disruption of cell resulting in their *** stress causes influx in intracellular calcium levels leading to higher concentrations of calcium in the *** accelerated calcium affects both the mitochondria and nuclei leading to excitotoxicity in *** calcium levels are controlled by voltage dependent calcium channels located in the plasma membrane,calcium stores like endoplasmic/sarcoplasmic reticulum and majorly by calcium binding *** study was aimed at analyzing the gene expression of major calcium binding proteins namely calcineurin,calmodulin,calreticulin,synaptotagamin and calsyntenin in stress induced PC 12 ***(1 mM),Peroxynitrite(10 mM),H_(2)O_(2)(100 mM)and High glucose(33 mM)were used to induce oxidative stress in PC12 *** obtained from the study suggest that calcineurin,calmodulin and calsyntenin gene expression were enhanced compared to the control due to oxidative ***,synaptotagmin and calreticulin gene expression were down ***,Akt protein expression(stress marker)was enhanced in PC12 cells with all other stress inducers except in hyperglycemic condition.

关键词： Akt Calcineurin Calmodulin Oxidative stress Peroxynitrite

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