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Effects of Thermal Radiation on a 3D Sisko Fluid over a Porous Medium Using Cattaneo-Christov Heat Flux Model

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Communications in Theoretical Physics 2018年第8期69卷 230-238页

作者： Deog-Hee Doh M.Muthtamilselvan E.ramya P.Revathi Division of Mechanical Engineering College of EngineeringKorea Maritime and Ocean UniversityBusan 606 791South Korea Department of Mathematics Bharathiar UniversityCoimbatore-641 046TamilnaduIndia

This paper investigates the three-dimensional flow of a Sisko fluid over a bidirectional stretching sheet, in a porous medium. By using the effect of Cattaneo-Christov heat flux model, heat transfer analysis is illustrated. Using similarity transformation the governing partial differential equations are transferred into a system of ordinary differential equations that are solved numerically by applying Nachtsheim-Swigert shooting iteration technique along with the 6-th order Runge-Kutta integration scheme. The effect of various physical parameters such as Sisko fluid, ratio parameter,thermal conductivity, porous medium, radiation parameter, Brownian motion, thermophoresis, Prandtl number, and Lewis number are graphically represented.

关键词： Sisko fluid Cattaneo-Christov heat flux model thermal radiation porous medium

Intelligent Vehicular Communication Using Vulnerability Scoring Based Routing Protocol

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Intelligent Automation & Soft Computing 2023年第1期35卷 31-45页

作者： M.ramya Devi I.Jasmine Selvakumari Jeya Department of Computer Science and Engineering Hindusthan College of Engineering and TechnologyCoimbatore641050India

Internet of Vehicles(IoV)is an intelligent vehicular technology that allows vehicles to communicate with each other via *** and the Internet of Things(IoT)enable cutting-edge technologies including such self-driving *** the existing systems,there is a maximum communication delay while transmitting the *** proposed system uses hybrid Cooperative,Vehicular Communication Management Framework called CAMINO(CA).Further it uses,energy efficient fast message routing protocol with Common Vulnerability Scoring System(CVSS)methodology for improving the communication delay,*** improves security while transmitting the messages through *** this research,we present a unique intelligent vehicular infrastructure communication management *** framework includes additional stability for both short and long-range mobile *** also includes built-in cooperative intelligent transport system(C-ITS)capabilities for experimental verification in real-world *** addition,an energy efficient-fast message distribution routing protocol(EE-FMDRP)has been *** combines the benefits between both temporal and direction oriented routing *** has been suggested for distributing information from the origin ends to the predetermined objective in a quick,accurate,and effective manner in the event of an *** critical value scale score(CVSS)employ ratings to measure the assault probability in Markov *** of chained transitions allow us to statistically evaluate the integrity of a group of *** the proposed method helps to enhance the vehicular *** CAMINO with energy efficient fast protocol using CVSS(CA-EEFP-CVSS)method outperforms in terms of shortest transmission latency achieves 2.6 sec,highest throughput 11.6%,and lowest energy usage 17%and PDR 95.78%.

关键词： Intelligent automation intelligent transport system vehicular networks markov chains internet of vehicles critical value scale score

Dental pulp stem cells and banking of teeth as a lifesaving therapeutic vista

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BIOCELL 2023年第1期47卷 71-80页

作者： SUKUMARAN ANIL ramya RAMADOSS NEBU GTHOMAS JASMIN MGEORGE VISHNUPRIYA KSWEETY Oral Health Institute Department of DentistryHamad Medical CorporationDohaQatar College of Dental Medicine Qatar UniversityDohaQatar Saveetha Dental College Saveetha Institute of Medical and Technical Sciences(SIMATS)ChennaiIndia Pushpagiri College of Dental Sciences MedicityPerumthuruthyIndia

Exfoliated deciduous or an extracted healthy adult tooth can be used to harvest,process,and cryogenically preserve dental pulp stem *** stem cell-based regenerative medicine methods could benefit significantly from these mesenchymal stem *** serve as a substantial source of mesenchymal stem cells,otherwise disposed of as medical *** should be taken to store this treasure trove of stem *** responsibility of patients,dentists,and physicians is necessary to ensure that this valuable resource is not wasted and that every possible dental pulp stem cell is available for use in the *** dental pulp stem cells(DPSC)inside teeth represent a significant future source of stem cells for regenerative medicine *** review describes the ontogeny,the laboratory processing and collection,and isolation methods of *** review also discusses currently available stem cell banking facilities and their potential use in regenerative medicine procedures in dental and general medical applications in the future.

关键词： Dental stem cell Stem cell therapy Differentiation Regeneration Tissue engineering Tooth banking

Novel Apodized Fiber Bragg GratingApplied for Medical Sensors:Performance Investigation

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Computer Modeling in Engineering & Sciences 2023年第4期135卷 301-323页

作者： ramya Arumugam Ramamoorthy Kumar Samiappan Dhanalakshmi Khin Wee Lai Lei Jiao Xiang Wu Department of Electronics and Communication Engineering College of Engineering and TechnologySRM Institute of Science and TechnologyKattankulathurChengalpattu603203India Department of Biomedical Engineering Faculty of EngineeringUniversiti MalayaKuala Lumpur50603Malaysia General Hospital of Xuzhou Mining Group Xuzhou221000China School of Medical Information&Engineering Xuzhou Medical UniversityXuzhou221000China

Sensors play an important role in shaping and monitoring human *** of methods to use Fiber Bragg Grating(FBG)with enhanced sensitivity has attracted great interest in the field of medical *** this paper,a novel apodization function is proposed and performance evaluation and optimization of the same have been made.A comparison was conducted between various existing apodization functions and the proposed one based on optical characteristics and sensor *** results evince the implementation of the proposed apodization function for vital sign *** optical characteristics considered for evaluation are Peak Resonance Reflectivity level,Side Lobes Reflectivity level and FullWidth HalfMaximum(FWHM).The proposed novel apodization novel function has better FWHM,which is narrower than the FWHM of uniform *** characteristics like a quality parameter,detection accuracy and sensitivity also show *** proposed novel apodization function is demonstrated to have a better shift in wavelength in terms of temperature and pulse measurement than the existing *** sensitivity of the proposed apodized function is enhanced with a Poly-dimethylsiloxane coating of varying thickness,which is 6 times and 5.14 times greater than uniform Fiber Bragg grating and FBG with the proposed novel apodization function,respectively,enhancing its utilization in the field of medicine.

关键词： Fiber bragg grating apodization optical sensing temperature strain sensitivity

Noninvasive in vivo cell tracking using molecular imaging:A useful tool for developing mesenchymal stem cell-based cancer treatment

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World Journal of Stem Cells 2020年第12期12卷 1492-1510页

作者： ramya Lakshmi Rajendran Manasi Pandurang Jogalekar Prakash Gangadaran Byeong-Cheol Ahn Department of Nuclear Medicine Kyungpook National UniversityDaegu 41944South Korea Brigham and Women’s Hospital Harvard Medical SchoolBostonMA 02115United States Department of Nuclear Medicine School of MedicineKyungpook National UniversityDaegu 41944South Korea BK21 Plus KNU Biomedical Convergence Program Department of Biomedical ScienceSchool of MedicineKyungpook National UniversityDaegu 41944South Korea Department of Nuclear Medicine School of MedicineKyungpook National UniversityKyungpook National University HospitalDaegu 41944South Korea

Mounting evidence has emphasized the potential of cell therapies in treating various diseases by restoring damaged tissues or replacing defective cells in the *** therapies have become a strong therapeutic modality by applying noninvasive in vivo molecular imaging for examining complex cellular processes,understanding pathophysiological mechanisms of diseases,and evaluating the kinetics/dynamics of cell *** particular,mesenchymal stem cells(MSCs)have shown promise in recent years as drug carriers for cancer *** can also be labeled with different probes and tracked in vivo to assess the in vivo effect of administered cells,and to optimize *** exact role of MSCs in oncologic diseases is not clear as MSCs have been shown to be involved in tumor progression and inhibition,and the exact interactions between MSCs and specific cancer microenvironments are not *** this review,a multitude of labeling approaches,imaging modalities,and the merits/demerits of each strategy are *** addition,specific examples of the use of MSCs and in vivo imaging in cancer therapy are ***,present limitations and future outlooks in terms of the translation of different imaging approaches in clinics are discussed.

关键词： Cell therapy Mesenchymal stem cells In vivo molecular imaging Drug delivery Superparamagnetic iron oxide

Intelligent Fuzzy Based High Gain Non-Isolated Converter for DC Micro-Grids

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Computers, Materials & Continua 2022年第5期71卷 4069-4084页

作者： M.Bharathidasan V.Indragandhi ramya Kuppusamy Yuvaraja Teekaraman Shabana Urooj Norah Alwadi School of Electrical Engineering Vellore Institute of TechnologyVelloreIndia Department of Electrical and Electronics Engineering Sri Sairam College of EngineeringBangaloreIndia Mobility Logisticsand Automotive Technology Research CentreFaculty of EngineeringETECDepartment of Electrical Engineering and Energy TechnologyVrije Universiteit BrusselBrussel1050Belgium Department of Electrical Engineering College of EngineeringPrincess Nourah bint Abdulrahman UniversityRiyadh 84428Saudi Arabia Department of Physics College of SciencesPrincess Nourah bint Abdulrahman UniversityRiyadh11671Saudi Arabia

Renewable electricity options, such as fuel cells, solar photovoltaic,and batteries, are being integrated, which has made DC micro-grids *** DC micro-grid systems, a multi input interleaved non-isolated dc-dcconverter is suggested by the use of coupled inductor techniques. Since itcompensates for mismatches in photovoltaic devices and allows for separateand continuous power flow from these sources. The proposed converter hasthe benefits of high gain, a low ripple in the output voltage, minimal stressvoltage across the power semiconductor devices, a low ripple in inductorcurrent, high power density, and high efficiency. Soft-switching techniquesare used to realize that the reverse recovery issue of the diodes is moderated, the leakage energy is reused, and no new scheme is appropriated. Toreduce conduction losses, minimum voltage rating MOSFETs with a low ONresistance can be utilized. The converter can supply the required power fromthe load in the absence of one or two resources. Furthermore, due to the highgain of boosting voltage, the converter works in an Adaptive Neuro-FuzzyInference System (ANFIS). The operation principle, steady-state analysis ofthe proposed converter, is given and simulated utilizing MATLAB/Simulinksimulation software.

关键词： Renewable energy sources DC micro-grid multi-input converter soft-switching techniques high gain

Thermal studies of individual Si/Ge heterojunctions--The influence of the alloy layer on the heterojunction

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Journal of Materiomics 2020年第2期6卷 248-255页

作者： Sien Wang Dongchao Xu ramya Gurunathan G.Jeffrey Snyder Qing Hao Department of Aerospace and Mechanical Engineering University of ArizonaTucsonAZ85721-0119USA Department of Materials Science and Engineering Northwestern UniversityEvanstonIL60208USA

Phonon transport across an interface is of fundamental importance to applications ranging from electronic and optical devices to thermoelectric *** phonon scattering by an interface can dramatically suppress the thermal transport,which can benefit thermoelectric applications but create problems for the thermal management of electronic/optical *** this aspect,existing molecular dynamics simulations on phonon transport across various interfaces are often based on estimates of atomic structures and are seldom compared with measurements on real *** this work,planar Si/Ge heterojunctions formed by film-wafer bonding are measured for the interfacial thermal resistance (R_(K)) that is further compared with predictions from existing simulations and analytical *** twist angle between a 70-nm-thick Si film and a Ge wafer is varied to check the influence of the crystal *** transmission electron microscopy studies are carried out to better understand the interfacial atomic *** is found that the alloyed interfacial layer with mixed Si and Ge atoms dominates the measured thermal resistance(R_(K)).Some oxygen impurities may also help to increase RK due to the formation of glassy *** this,RK reduction should be focused on how to minimize the interdiffusion of Si and Ge atoms during the formation of a Si/Ge heterojunction.

关键词： Thermal boundary resistance Si/Ge heterojunction Film-wafer bonding Phonon

Effects of velocity and thermal wall slip on magnetohydrodynamics(MHD)boundary layer viscous flow and heat transfer of a nanofluid over a non-linearly-stretching sheet:a numerical study

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Propulsion and Power Research 2018年第2期7卷 182-195页

作者： Dodda ramya R.Srinivasa Raju J.Anand Rao A.J.Chamkha Department of Mathematics University College of ScienceOsmania UniversityHyderabad 500007Telangana StateIndia Department of Engineering Mathematics GITAM UniversityHyderabad CampusRudraram 502329Medak(Dt)Telangana StateIndia Mechanical Engineering Department Prince Mohammad Bin Fahd UniversityP.O.Box 1664Al-Khobar 31952Saudi Arabia

In this analysis,the boundary layer viscous flow of nanofluids and heat transfer over a non-linearly-stretching sheet in the presence of a magnetic field is *** and thermal slip conditions are considered instead of no slip conditions at the boundary.A similarity transformation set is used to transform the governing partial differential equations into non-linear ordinary differential *** reduced equations are solved numerically using the Keller box *** influence of the governing parameters on the dimensionless velocity,temperature,nanoparticle concentration as well as the skin friction coefficient,Nusselt number,and local Sherwood number are *** is found that as the velocity slip parameter increases,the velocity profile is decreased and the skin friction and heat transfer decreased while the mass transfer is *** the thermal slip parameter causes decreases in the heat and mass transfer *** results are presented in both graphical and tabular forms.

关键词： Magnetogydrodynamics(MHD) Nanofluid Non-linearly stretching sheet Velocity slip Thermal slip

Valorization of agro-industrial fruit peel waste to fluorescent nanocarbon sensor:Ultrasensitive detection of potentially hazardous tropane alkaloid

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Frontiers of Environmental Science & Engineering 2022年第3期16卷 1-11页

作者： Athiyanam Venkatesan ramya Manoj Balachandran Nanocarbon Research Group Materials Science Research LaboratoryDepartment of Physics and ElectronicsCHRIST(Deemed to be University)Bengaluru-560029KarnatakaIndia

Millions of tonnes of agro-industrial waste are generated each year globally,with the vast majority of it going untreated,underutilized,and disposed of by burning or landfilling,causing severe environmental distress and economic downturn.A practical solution to this global issue is to use green chemistry to convert this waste into value-added ***,in the present study,agro-industrial orange peel waste was valorized into fluorescent nanodiamond-like carbon sensor via a green route involving hydrothermal treatment of microwave carbonized orange peel *** developed sensor,used for the fluorescence detection of potentially hazardous drug atropine sulfate,exhibits unique dual linearity over concentration ranges of 300 nM to 1 M and from 1 M to 10 M,as well as ultra-low sensitivity of 34.42 nM and 356.46 nM,***,the sensor demonstrates excellent reproducibility,high stability,and satisfactory recovery when used to identify and quantify atropine sulfate in biological samples and commercially available pharmaceuticals,indicating promising multidisciplinary applications.

关键词： Agro-industrial waste Orange peel Valorization Nanodiamond-like carbon Atropine sulphate Fluorescence sensing