59 results on '"Vidhya, M."'
Search Results
2. Construction and Rescue of a Minigenome System for Lentogenic D58 Strain of Avian orthoavulavirus 1 (Newcastle Disease Virus).
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Vidhya, M., Kirubaharan, J. John, Gururaj, K., Rajasekaran, Ranjani, and Rajalakshmi, S.
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REVERSE genetics , *GENE expression , *MOLECULAR cloning , *REPORTER genes , *NEWCASTLE disease virus , *GENE transfection - Abstract
Background: In reverse genetics studies, minigenomes of negative sense RNA viruses are used to model the process of virus replication and evaluate the virus rescue system in the course of construction of recombinant virus. In the current study, a minigenome (MG) rescue system for lentogenic D58 vaccine strain of Avian orthoavulavirus 1 (AOAV-1) (Newcastle disease virus) was developed to establish a reverse genetic system for this strain. Methods: The minigenome was constructed by assembling the trailer and leader regions of AOAV-1 D58 strain flanking the reporter gene, Aequorea coerulescens green fluorescence protein (AcGFP) in a modified transcription vector. Construction of this Minigenome was done using a simple restriction free technique-Splicing by Overlap Extension PCR. The constructed minigenome was evaluated for the reporter gene expression by transfection in T7 RNA polymerase expressing BSR/T7 cell line. Further, the replication and packaging ability of the constructed minigenome were also analyzed. Result: The reporter gene expression was confirmed in BSR/T7 cells which simulates the virus replication process and verifies the virus rescue system. In addition, this proves the applicability of restriction free cloning by Splicing by Overlap Extension (SOE) PCR for precise construction of the minigenome. The developed minigenome system can be used as a potential tool in the reverse genetic rescue of AOAV-1 D58 strain for the development of marker vaccine. [ABSTRACT FROM AUTHOR]
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- 2024
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3. P2Y12 receptor residues crucial for thrombosis regulation.
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Vidhya, M.
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VENOUS thrombosis , *THROMBOSIS , *PROTEIN-protein interactions , *MYOCARDIAL infarction , *HEMATOPOIESIS - Abstract
Thrombosis, or the formation of blood clots, can lead to serious medical conditions such as stroke, heart attack, and deep vein thrombosis. The purinoreceptor P2Y12 plays a critical role in the thrombotic pathway and is targeted for therapy to prevent clot formation. However, it is essential to balance the regulation of thrombosis to avoid adverse situations. This study focuses on the P2Y12 receptor and aims to discern the protein residue network and differentiate residues based on their intramolecular interactions. The study utilized a statistical analysis to characterize the significant residues involved in ligand interaction, which helps to identify critical residues that are essential for the function of the receptor. A parametric analysis of interactions of residues in the intraprotein interaction was conducted, which revealed significant residue‐based contacts that facilitate protein interactions. By examining the interactions between residues, the mechanisms underlying protein interactions were studied and the importance of specific residues in facilitating these interactions was determined. This research provides important information on P2Y12, and the findings based on the network based significance of interacting residues may contribute to the development of new therapies that target the receptor to prevent clot formation while maintaining a balance in thrombosis regulation to avoid adverse outcomes. Ultimately, this study could lead to improved treatments for thrombotic disorders and better patient outcomes. [ABSTRACT FROM AUTHOR]
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- 2023
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4. Soret and chemical reaction effects of free convective flow through porous medium bounded by vertical surface.
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Vasavi, B., Vidhya, M., Govindarajan, A., and Priyadharshini, E.
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CONVECTIVE flow , *FREE convection , *CHEMICAL reactions , *POROUS materials , *PRANDTL number , *NATURAL heat convection - Abstract
In this article, we studied the Soret and "chemical reaction effect" of "free convection flow through a porous medium bounded by a vertical infinite surface".By regular "perturbation technique" to solve the governing equations and finding the velocity, temperature and concentration of the fluids. The respective "profiles have been obtained for different values of parameters like the Grashof number, Prandtl number, and the chemical reaction parameter". The graphs depicted shown the various reactions of the different fluid parameters. [ABSTRACT FROM AUTHOR]
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- 2022
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5. Free convention oscillatory "Flow through porous medium in a rotating vertical plate" "In the presence of radiation heat source and transverse magnetic field".
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Vidhya, M., Vasavi, B., and Govindarajan, A.
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CONVECTIVE flow , *FREE convection , *HEAT radiation & absorption , *POROUS materials , *RADIATION sources , *MAGNETIC fields , *ANGULAR velocity - Abstract
This theoretical study investigates the "effects of permeability and injection/suction on an oscillatory free convective flow of a viscous incompressible fluid through a highly porous material restricted between two infinite vertical porous plates". "The entire system spins around the axis normal to the plate planes with a uniform angular velocity W. For small and large rotations, the dependence of the steady and unstable resultant velocities, as well as their phase differences, on various parameters is discussed in detail". [ABSTRACT FROM AUTHOR]
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- 2022
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6. An axisymmetric flow over non-linear radially stretching surface with heat transfer and chemical reaction effects.
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Vidhya, M., Juliet, S. Sheeba, Govindarajan, A., and Priyadarshini, E.
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HEAT transfer , *CHEMICAL reactions , *BOUNDARY layer (Aerodynamics) , *FLUID flow - Abstract
The solution of the problem obtained using Homotopy Perturbation Method (HPM) in this paper. Considered the boundary layer fluid flow over porous medium with chemical reactions and heat transfer. Using Similarity variables in non-linear PDE it will be reduced to ordinary DE then the solution found using HPM. The fluid flow features and the different values of governing parameters are analysed using graphs. [ABSTRACT FROM AUTHOR]
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- 2022
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7. Soret and dufour effect of radiating fluid with Hall current and ramped wall temperature past vertical porous channel.
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Sheeba, Juliet S., Vidhya, M., Govindarajan, A., and Priyadarshini, E.
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THERMOPHORESIS , *VISCOUS flow , *HALL effect , *FLUIDS , *TEMPERATURE , *HYDROELECTRIC power plants - Abstract
Soret and Dufour effect with hall current of a magneto hydro dynamic flow of a viscous fluid through vertical porous channel is studied here. Also studied the impacts of ramped wall temperature on the incompressible fluid. Using regular perturbation technique with boundary conditions the velocity, temperature and concentration of the fluid are calculated and it shows the velocity of the fluid increases when Soret number increases and velocity decreases with the increasing values of Dufour number. Also the variations in temperature and concentration also studied with the help of graphs. [ABSTRACT FROM AUTHOR]
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- 2022
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8. Moisture Management Properties of Single Jersey Knitted Fabrics Made from Regenerated Bamboo: Polyester Core-Spun Yarns.
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Vidhya, M., Parveen Banu, K., Kumar D, Vasanth, Prakash, C., and Subramaniyam, V.
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KNIT goods , *POLYESTERS , *YARN , *MOISTURE , *REAL estate management , *BAMBOO , *POLYESTER fibers - Abstract
Today, the capacity to regulate moisture is one of the most crucial qualities of knitted fabrics. This study focuses on the interaction between core ratio, twist, and loop length on the moisture management capabilities of single jersey knitted textiles manufactured from 100% regenerated bamboo, 80:20 regenerated bamboo: polyester yarns, and 60:40 regenerated bamboo: polyester yarns. The Box-Behnken experimental design was used to optimize the design parameters in this study. It was discovered that the moisture management qualities were improved by the increased polyester core content, high twist, and short loop length. Single jersey knitted fabrics made from 100% regenerated bamboo yarns swiftly wick away sweat and maintain moisture in their structure, resulting in a very fast wetting rate, spreading speed, and extremely large maximum wetted radius, as well as a very excellent AOTI value and very good OMMC ratings. Additionally, it can be suggested that single jersey knitted textiles consisting of core-spun yarns provide quick absorption and quick drying rates, meeting the needs of sportswear applications. [ABSTRACT FROM AUTHOR]
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- 2022
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9. Construction of bimetallic ZnSe–CoSe2 flower as a finely tuned electrode for enhancing supercapacitor performance.
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Sangeetha Vidhya, M., Yuvakkumar, R., and Ravi, G.
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SUPERCAPACITOR performance , *SUPERCAPACITOR electrodes , *POWER resources , *POTENTIAL energy , *ENERGY storage , *LIGHT emitting diodes , *SUPERCAPACITORS - Abstract
Summary: The widespread demand in satisfying human desires entails huge energy consumption. In response, potential impact toward the energy storage tool plays an essential role in constant energy supply. In this work, bimetallic ZnSe–CoSe2 electrode material was designed owing to its low pollution, high chemical stability, and theoretical capacity for supercapacitor applications. The basic characterization confirmed the formation of structural, morphological, and phase purity of the as prepared composite. The prologue of agglomerated CoSe2 microcubes into ZnSe pyramidal structure and synergetic effect of the individual component comprises multifunctionalities during redox progression attributable to greater structural potency. The rigid contact stuck between pyramidal structured ZnSe and CoSe2 agglomerated microcubes favors the regular contact with the electrolyte for prompt ion diffusion. These fine advantageous properties notably endows with greater charge storage progression demonstrating the active construction of ZnSe–CoSe2 heterostructures. The prepared product delivered 645 Fg−1specific capacitance at 1Ag−1 in half cell configuration and exhibited the capacity retention of 99.6% at 10Ag−1, retained over 5000 cycles. In addition, the assembled full cell showed 57 Whkg−1energy density at 743 Wkg−1power density and opens up a new way to access the progress of high performance supercapacitor with specific capacitance of 184 Fg−1 and retaining long life span of 93.3% at 10 Ag−1 after 5000 cycles. Finally, two cells in series owns a high working potential of 1.92 V and effectively burn up light emitting diode (LED) indicating their potential function in energy storage device. [ABSTRACT FROM AUTHOR]
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- 2022
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10. A fast adaptive SVDIncExtreme learning machine framework for remote sensing image classification.
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Vidhya, M, Sudha, S K, and Aji, S
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MACHINE learning , *REMOTE sensing , *SINGULAR value decomposition , *GABOR filters , *ONLINE education , *CLASSIFICATION - Abstract
Quick and efficient classification of images is important in many Remote Sensing Image (RSI) understanding tasks. The enormous availability of the RSI makes the classification a challenging task, which further needs to design more efficient models. Realizing the wide range of applications of the research area, a new fast Remote Sensing Image Classification (RSIC) framework using an Adaptive Singular Value Decomposition incorporated Extreme Learning Machine (ASVDIncELM) is proposed in this work. The classification framework uses Multi-Scale, Multi-Band (MSMB) Gabor filters to extract Opponent Colour Texture (OCT) features to represent the knowledge patterns. As the input knowledge patterns are High Dimensional (HD), an Adaptive Growing-Pruning Hidden Node Selection (AGPHNS) criterion is integrated with ASVDIncELM. A user-defined heuristic is used to select the optimal number of hidden nodes. The ASVDIncELM framework supports online learning of samples that come as blocks of fixed length. The efficiency of the framework is evaluated using three benchmark RSI datasets- UC Merced (UCM), RS-19, and PatternNet. The results obtained are promising for both offline and online scenarios in terms of Overall Accuracy (OA), Weighted Average (WA) of Precision, Recall, F1-Score, and training time. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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11. Recent Progression of Flower Like ZnSe@MoSe2 Designed as an Electrocatalyst for Enhanced Supercapacitor Performance.
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Sangeetha Vidhya, M., Yuvakkumar, R., Senthil Kumar, P., Ravi, G., Velauthapillai, Dhayalan, and Bijad, Majede
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SUPERCAPACITOR performance , *ELECTRON mobility , *ENERGY density , *SUPERCAPACITORS , *POWER density , *ION mobility - Abstract
Supercapacitors are a reliable device that has set an innovative path for the research line to face the energy gap. Consequently, remarkable steps were taken to prop up fabricated electrode materials electrochemical performance. ZnSe, MoSe2 and the composite of the mixed formation of ZnSe@MoSe2 has been individually investigated and the electrochemical performances have been studied for supercapacitor applications. The quality of the synthesized material was thoroughly examined using basic characterization studies. The binary composite of ZnSe@MoSe2 electrode delivered high specific capacitance of 450Fg−1 at 1Ag−1 in the charge–discharge profile and stable long cycle life retaining 99.6% over 2000 cycles at 10Ag−1 current density. Moreover, the existence of the flower like ZnSe@MoSe2 composites increases electrochemical performance by offering the additional electrolyte ions and the electrons mobility. Furthermore, full cell configuration via ZnSe@MoSe2//AC was assembled for 1.5 V and endowed with 43WhKg−1 energy density at 740WKg−1 power density signifying its capability over 99.3% of retention capacity. In favor of the potential applicability, full cell incorporated in series displayed 1.56 V and able to power up the three different LED's, further enlightening the dominance in supercapacitor performance. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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12. Electrochemical Enhancement of Binary CuSe2@MoSe2 Composite Nanorods for Supercapacitor Application.
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Vidhya, M. Sangeetha, Yuvakkumar, R., Kumar, P. Senthil, Ravi, G., Velauthapillai, Dhayalan, and Asrami, Padideh Naderi
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NANORODS , *NEGATIVE electrode , *CARBON electrodes , *ENERGY density , *ELECTROCHEMICAL analysis - Abstract
The arrays of nanorods decorated with nanosphere blended by hydrothermal route were reported. The high surface area and open geometry sandwiched between nanorods let easier for electrolyte diffusion and hence affords more electroactive sites. The surface and structural properties were consequently defined by standard characterization analysis. To review the properties of binary composite nanorods designed for supercapacitor application, it scanned experimentally through standard electrochemical analysis. While increasing stoichiometric molar ratio of the active electrode, the specific capacitance increased obviously is depicted as 1:1 (200 Fg−1), 2:1 (281 Fg−1) and 3:1 (509 Fg−1) and the composite electrode retains 99.82% of retention over 2000 cycles. Besides, as an asymmetric device with improved energy density was build up effectively by CMS-3 nanorod as positive and activated carbon as negative electrode and achieved 113 WhKg−1 energy density at 1 Ag−1 with 98.1% stability in 2000 cycles. The practical demonstration of asymmetric device has been tested and simply energizes the red light-emitting diode (LED). As per the above discussion, the improved activity of CuSe2@MoSe2 was because of Cu and Mo inclusion with selenium further progress its conductivity, well-retained surface morphology and high reversibility. Consequently, the good contact between them ensured the smooth transportation of electrons without any obstacles. Hence, the synergetic effect affords the way for immense development of the binary composite for hopeful future. [ABSTRACT FROM AUTHOR]
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- 2022
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13. Hydrothermal Synthesis of Flower Like MnSe2@MoSe2 Electrode for Supercapacitor Applications.
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Vidhya, M. Sangeetha, Yuvakkumar, R., Kumar, P. Senthil, Ravi, G., and Velauthapillai, D.
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ENERGY storage , *ENERGY density , *SUPERCAPACITOR performance , *LED displays , *TRANSITION metals , *SUPERCAPACITOR electrodes - Abstract
Active electrodes of transition metal selenides attract extensive consideration in energy storage application because of its improved electrochemical performances. In this study, evolution of flower like MnSe2@MoSe2 was subsequently synthesized through one pot hydrothermal route. Growth of combined composite exposed flowerlike morphology with looser corrugated nanospikes increases surface area for redox reaction which reduces ionic diffusion pathway and improves supercapacitor performance in three-cell configurations. The best performed (MMS-3) electrode exhibited 719 Fg−1 specific capacitance and retained 99.78% capacity retention over 2000 cycles. Furthermore, as an asymmetric MnSe2@MoSe2//AC device delivered significant 75 Whkg−1 energy density at 747 Wkg−1 power density. Besides, asymmetric (MMS-3)//AC device maintained 99.16% capacity retention after constant 2000 charge discharge cycles. In a small-scale practical demonstration, MnSe2@MoSe2//AC device illuminated red LED and displayed improved electrochemical performance. Hence, both Mn (manganese) and Mo (molybdenum) mutual role promotes more affluent redox chemistry, which is beneficial for higher electrochemical activity. Thereby, Se provided greater number of electroactive sites that can aid maximum utilization of electrolyte ions. [ABSTRACT FROM AUTHOR]
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- 2022
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14. Effect of Heat Source on MHD Flow Through Permeable Structure under Chemical Reaction and Oscillatory Suction.
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Lawanya, T., Vidhya, M., Govindarajan, A., and Priyadarshini, E.
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OSCILLATING chemical reactions , *BOUNDARY layer (Aerodynamics) , *CHEMICAL structure , *CHEMICAL reactions , *CONVECTIVE flow , *MASS transfer , *FREE convection , *LAMINAR flow - Abstract
Magnetohydrodynamics (MHD) deals with the study of the magnetic properties and behaviour of electrically conducting fluids. In literature, researchers have studied. The study of MHD is widely applied in drawing of plastics and elastic sheets, metal and polymer expulsion forms, paper creation, cooling of metallic sheets, etc. Most of the previous researchers have studied only the concentration and velocity boundary layer profiles. However, the effect of heat sources using temperature boundary layer profiles is not studied. Therefore, in this work, an analysis of a convective flow of an electrically conductive, viscid compact fluid through a perpendicular plate which is porous with oscillatory suction with first-order temperature and chemical reaction and the transverse magnetic field is carried out. The developed model consists of continuity, momentum, and heat and mass transfer equations, and the perturbation technique was applied in order to find the result for the velocity field, temperature profiles, and concentration distributions. Further, the influence of the flow variables on the temperature field, velocity field, and concentration dispersal was analyzed and the results were depicted graphically. Moreover, the skin friction and the rate of mass transfer (local Sherwood number) were analyzed using tables. In this work, an unstable 2D flow of a laminar, viscid (Newtonian), electrically conducting fluid across a semi-limitless perpendicular permeable plate under motion in its plane (x-axis) embedded in a constant permeable structure was investigated. [ABSTRACT FROM AUTHOR]
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- 2022
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15. Effect of molar concentration on optoelectronic properties of NiO nanoparticles for p-n junction diode application.
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Vidhya, M., Sumathi, N., Sadaiyandi, K., Rajapandi, P., Elumalai, K., Arunkumar, S., Mary, A. Nancy, Marnadu, R., Khan, Farhat S., and Shkir, Mohd.
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MOLARITY , *DIODES , *RAMAN scattering , *BAND gaps , *NANOPARTICLES , *X-ray diffraction - Abstract
In this work, fine nickel oxide nanoparticles (NiO NPs) were successfully made utilizing a straightforward co-precipitation approach at low temperature. The effects of precursor concentration on the structural, optical, and electrical characteristics of NiO nanoparticles were investigated. All indexed diffraction peaks in XRD demonstrate the production of NiO with cubic structure. An increase in NiO crystallite size above 16.8 nm was observed when the precursor concentration exceeds 2 M, suggesting the presence of nanostructure in the final product. In FT-Raman spectra, the band centered at ∼ 500 cm–1 is due to Ni-O stretching (LO) mode, and two-magnon (2 M) scattering mode causes the band at 1514 cm–1. The synthesized product is composed of almost rod-shaped particles with a size range of 10–20 nm, according to FESEM pictures. The UV absorption studies showed a high absorption at the fundamental absorption edges originating at 332 nm, which gradually shifted to a lower energy region up to 400 nm with increasing precursor concentration, which means a reduction in bandgap values. The effect of precursor concentration associated with the electrical characteristics of the produced NiO nanoparticles has been investigated for the temperature range 30 to 130 °C. The I-V characterization was used to compute the different photo-diode parameters including n, Ф B , I o , P S , R, QE, and D*. The remarkable high photosensitivity of 1100% and specific detectivity of 4.324 × 10−10 Jones for the diode evaluated at 120 mW/cm2 was observed in a 2 M fabricated diode. These findings imply that all the fabricated diodes are exceptionally light-sensitive and are well-suited for upcoming UV photodetector applications. [Display omitted] • Development of NiO nanostructures-based photodiode with remarkable photosensitivity is reported • The XRD and Raman analyses confirm the synthesis of cubic NiO system • Crystallite size was improved from 10 to 17 nm with an increase in molar concentrations • Rising concentrations cause a steady decrease in the band gap energy from 3.45 to 3.1 eV. • A remarkably high photosensitivity of 1100% was observed for the device developed with 2 M concentration. [ABSTRACT FROM AUTHOR]
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- 2024
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16. Prediction of wheat production in India through fuzzy time series.
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Priyadarshini, E., Premalathasri, R., and Vidhya, M.
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FORECASTING , *CLOUDINESS , *AMBIGUITY , *TIME series analysis - Abstract
Wheat is the main growing cereal crop in India. For the country, designing, estimating productivity is the important tool for predicting the production of wheat to determine the circumstances that would be the value of production upcoming year. Fuzzy time series deals with the problems associated with unpredictability ambiguousness and cloudiness. In this study enlargement of fuzzy time series variant model is used in forecasting wheat production. The data of previous years from 2000 to 2021 was taken for analysis and the proposed method on fuzzy time series estimates future events' precision rate. The suggested method used the percentage change as the Universe of Discourse and Average-based Partitioning. [ABSTRACT FROM AUTHOR]
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- 2024
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17. Demonstration of 1.5 V asymmetric supercapacitor developed using MnSe2-CoSe2 metal composite.
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Vidhya, M. Sangeetha, Yuvakkumar, R., Ravi, G., Babu, E. Sunil, Saravanakumar, B., Nasif, Omaima, Alharbi, Sulaiman Ali, and Velauthapillai, Dhayalan
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METALLIC composites , *LIGHT emitting diodes , *ENERGY density , *POWER density , *SUPERCAPACITOR electrodes , *ENERGY storage , *HEAT storage - Abstract
Metal selenides of were synthesized for various weight percentage of Mn (0.05, 0.1, and 0.15 wt %). MnSe 2 -CoSe 2 emerged as the novel-energy storing material for the supercapacitor application and guaranteed the improved electrochemical performance in asymmetric configuration. As prepared metal selenide composite was explored for standard characterization studies. XRD reveals the highly crystalline in nature of the as prepared samples. Se bonding with Mn-Co is confirmed from the sharp peak obtained at 470 cm−1. The chemical elemental composition was evaluated by the XPS, hence the characterization outcome confirm the successful growth of the material. The specific capacitance of Mn3 (0.15 wt %) is 373 Fg-1 in 1 M KOH; Mn1 (0.05 wt %-184 Fg-1) and Mn2 (0.1 wt %-295 Fg-1). The electrode shows excellent capacity retention of 95.86% at 5 Ag-1 even after 5000 cycles. Furthermore, asymmetric configuration of Mn3 (0.15 wt %)//AC device delivered significant value of power density even at high energy density. Thus, the as-prepared asymmetric device easily illumines the green light emitting diode which indicates the Mn3 (0.15 wt %) is an acceptable product. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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18. Soret and transfer effects on oscillatory flow over a vertical plate through porous medium in the presence of transverse magnetic field.
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Vidhya, M., Niranjana, N., Govindarajan, A., Motsa, Sandile, Priyadarshini, E., Govindarajan, A, Balaji, N, Gajendran, G, and Behra, Harekrushna
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FREE convection , *THERMOPHORESIS , *POROUS materials , *MAGNETIC fields , *MASS transfer , *CHEMICAL reactions - Abstract
From this paper analyses about mass and heat mass transfer effects along by thermal diffusion along with warm source of an oscillatory flow in a 2D, thick, electrically fluid through an infinite vertical penetrable plate with moving condition within a flooded porous medium into the occurrence of transfer attractive field and chemical reaction. Heat source and soret impacts are added into the governing equation to discuss about the velocity, temperature and concentration profile of the current problem. The series expansion method is used to get the analytical solution and the relevant results are depicted through graphs. Various non-dimensional parameters like Chemical response parameter, Prandtl number, Soret effect, magnetic field parameter and Grashof number for mass transfer are all discussed through graphs. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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19. Effect of mass transfer with chemical reactions on MHD free convective flow of dissipative and radiative fluid past an infinite vertical plate.
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Juliet, S. Sheeba, Vidhya, M., Govindarajan, A., Bianchini, Stefano, Govindarajan, A, Balaji, N, Gajendran, G, and Behra, Harekrushna
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CONVECTIVE flow , *MASS transfer , *RADIATIVE flow , *CHEMICAL reactions , *ORDINARY differential equations , *PARTIAL differential equations , *FREE convection , *MAGNETOHYDRODYNAMICS - Abstract
A theoretical investigation of consequence of movement of mass with chemical transmission on MHD natural convective glide of dissipative and radiative liquid through endless perpendicular plate is carried out. Using non-dimensional measures basic PDE are converted into pair of ordinary differential equations. Solve the system of partial differential equations using Perturbation technique. The values of fluid velocity, fluid temperature and species density are exposed graphically. [ABSTRACT FROM AUTHOR]
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- 2020
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20. Effect of radiation and heat source on unsteady MHD free convective flow past a vertical porous plate.
- Author
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Vidhya, M., Juliet, S. Sheeba, Govindarajan, A., Rashad, A. Mohamad, Priyadarshini, E., Govindarajan, A, Balaji, N, Gajendran, G, and Behra, Harekrushna
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HEAT radiation & absorption , *RADIATION sources , *THERMOPHORESIS , *MAGNETOHYDRODYNAMICS , *CONVECTIVE flow , *CHEMICAL reactions , *MAGNETIC fields - Abstract
The aim of the present paper is to explore radiation effect with heat source on unstable natural convective MHD flow past on vertical porous plate. In perpendicular direction to the plate an uniform magnetic field will be applied. Thermal radiation effect, chemical reaction effect and soret effect are included. Reactions of various parameters on velocity, temperature and concentration are verified and analyzed through graphs. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
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21. Effect of mass transfer and chemical reaction on three dimensional flow through porous medium with heat transfer and heat source.
- Author
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Niranjana, N., Vidhya, M., Govindarajan, A., Rashad, A. Mohamad, Govindarajan, A, Balaji, N, Gajendran, G, and Behra, Harekrushna
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MASS transfer , *CHEMICAL reactions , *HEAT transfer , *POROUS materials , *FREE convection , *VELOCITY - Abstract
In this present paper, let us discus about a three dimensional progression of a thick incompressible liquid between two equal unending permeable plate in flat position. The two related plates has the pulling and instillation properties. In this case, the fluid was inserted through one side of the plate with fixed velocity and on the opposite side, it was detached away with crosswise velocity. Mass transfer, chemical reaction, heat source and magnetic hydro dynamic effects are all added into the governing equations. The series expansion method is used to obtain the investigative resolution of this problem. The temperature, concentration and velocity effects for various non-dimensional parameters are discussed and the results are discussed through graph. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
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22. Effect of mass transfer and radiation on unsteady free convective flow past a vertical porous plate with variable temperature in the presence of transverse magnetic field on heat source.
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Lawanya, T., Vidhya, M., Govindarajan, A., Govindarajan, A, Balaji, N, Gajendran, G, and Behra, Harekrushna
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FREE convection , *MASS transfer , *MAGNETIC fields , *CONVECTIVE flow , *NUSSELT number , *RADIATION , *HEAT - Abstract
Right now logical investigation on MHD unstable permitted convective stream past a upright permeable plate having heat source is introduced alongside the impact of mass exchange and radiation with variable temperature. The impacts of different physical constraints on the speed, temperature and concentration are portrayed sketchily and the numerical estimations of physical amounts like Skin erosion, Nusselt number and Sherwood number for different parameters are introduced through tables. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
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23. Effect of mass transfer with chemical reaction on MHD convective flow through a porous medium in a hot vertical channel with thermal radiation.
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Vidhya, M., Lawanya, T., Govindarajan, A., Bianchini, Stefano, Govindarajan, A, Balaji, N, Gajendran, G, and Behra, Harekrushna
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CONVECTIVE flow , *MASS transfer , *HEAT radiation & absorption , *CHEMICAL reactions , *POROUS materials , *MAGNETOHYDRODYNAMICS , *FREE convection - Abstract
The issue of MHD Unstable permitted convective stream past a vertical permeable plate with heat sources is introduced alongside the impact of mass exchange and radiation with variable temperature. The impacts of several physical constraints on the speed, temperature and concentration profiles are portrayed explicitly and the statistical standards of Skin friction, Nusselt number and Sherwood number are exposed over tables. Magnetic field strength is applied consistently upright to the planes of the plates. It's noted, speed drops with rise in magnetic parameter, and also speed rises with rise in Grashof number exchange. Temperature drops with rise in Radiation parameter. Mass diffusion rises with rise in chemical reaction constraint. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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24. Cu2S electrochemical energy storage applications.
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Vidhya, M. Sangeetha, Ravi, G., Yuvakkumar, R., Kumar, P., Velauthapillai, Dhayalan, Saravanakumar, B., Babu, E. Sunil, and KR, Aranganayagam
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ENERGY storage , *CARBON foams , *CRYSTAL structure , *X-ray diffraction , *HEAT storage , *COMBUSTION , *ELECTRIC capacity , *VOLTAMMETRY - Abstract
Cu2S nanopowders were prepared by sol gel combustion method. X-ray diffraction study confirmed tetragonal structure of crystalline (110) plane. Cu2S nanostructure revealed nanorod like morphology. The strong and sharp Raman peaks observed at 474 cm−1 revealed covellite structure. PL emission at 360 nm confirmed material near band edge emission. The IR spectra revealed Cu-S vibration band observed at 607 cm−1. The electrochemical characteristics of synthesized nanomaterial were investigated by cyclic voltammetric analysis. Cu2S exhibits 547 F/g specific capacitance at 0.5 A/g current density obtained by using 1M KOH as electrolytic solution. These results indicated its promising behavior towards electrochemical energy storage applications. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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25. Hydrothermal synthesis of Bare and Ni doped CdO nanostructures for antibacterial applications.
- Author
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Vidhya, M. Sangeetha, Rani, B. Jansi, Ravi, G., Yuvakkumar, R., Sharma, Veerendra K., Prajapat, C. L., and Yusuf, S. M.
- Subjects
- *
GRAM-negative bacteria , *HYDROTHERMAL synthesis , *X-ray diffraction , *WAVENUMBER , *NANOSTRUCTURES - Abstract
The synthesis of undoped and Ni doped CdO was synthesized by simple hydrothermal technique. The influence of Ni dopant on crystal structure, optical properties and antibacterial studywas observed. The X ray diffraction studies reveal the prepared CdO nanoparticles had good crystallinity and cubic phase with (111), (200), (220), (311) and (222) orientations. The absorption band at different wave numbers assigned to different functional group in FTIR and also confirmed the metal oxygen vibration at 465 cm-1. The SEM image shows that the pure CdO sample showsagglomeration of particles or grains. The Ni doped CdO shows some agglomeration with spheroid like structure by the addition of the dopant. The present work is aimed at investigating antibacterial activity of undoped and Ni doped CdO. The antibacterial activity was carried out at different concentration (50, 100, 150µg/µl) in vitro against two gram positive bacteria Staphylococcus aureus (MTCC 3160), Bacillus subtilis (MTCC 441) and two gram negative bacteria Pseudomonas aeruginos (MTT 741), Escherichia coli (ESBL 3984) and from the zone of inhibition confirmed that the Ni doped CdO can be used as the good antibacterial agent. The present study guides the new route of application of pure and Ni doped CdO nanomaterial in environmental and biomedical areas. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
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26. Chemical Reaction of Free Convective MHD Flow Through Vertical Porous Plate with Variable Temperature Through A Porous Medium with Heat and Mass Transfer.
- Author
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Juliet, S. Sheeba, Vidhya, M., Govindarajan, A., Siva, E. P., and Priyadarshini, E.
- Subjects
- *
FREE convection , *CONVECTIVE flow , *MASS transfer , *CHEMICAL reactions , *POROUS materials , *HEAT transfer - Abstract
In this paper we have studied Chemical Reaction of free convective MHD flow through vertical porous plate with variable temperature through a porous medium with heat and mass transfer. Considered the vertical plate and the medium of flow are porous. The effects of the physical parameters on the velocity, temperature, concentration, skin friction, Nusselt number have been analyzed through graphs and tables. The present study has great significance in different field of science and engineering. These flows appear in a wide variety of industrial applications and chemical process industries. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
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27. Effects of Heat Source Parameter on Oscillatory Flow With Mass Transfer in The Presence of The Transverse Magnetic Field.
- Author
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Lawanya, T., Vidhya, M., Govindarajan, A., and Siva, E. P.
- Subjects
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MASS transfer , *MAGNETIC fields , *NUSSELT number , *HEAT , *LORENTZ force , *FREE convection - Abstract
In the present paper, we analyze the effects of chemical reaction and mass transfer in the presence of transverse magnetic field for an oscillatory flow through a porous medium along with heat source. The analytical solutions are obtained using series method in covered form. The impact of different dimensionless parameters pertinent to a velocity, temperature and concentration profiles are explored and investigated through graph. The velocity profile decreases when there is an increase in magnetic parameter due to the gravitational pull i.e., Lorentz force. Velocity profiles decreases when there is an increase in Schmidt number Sc, Reynolds number Re. Velocity also increases with increase in Gr and Gc. It’s likewise seen that the temperature θ decreases with imcreases im ω amd imcreases with N, Pe and ∝. Increase in Sc, Kc, ω, increases the species concentration. Nusselt number, Sherwood number and skin friction are discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
28. Effect of chemical reaction and heat source on oscillatory flow of couple stress fluid in wavy channel.
- Author
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Lawanya, T., Vidhya, M., Govindarajan, A., and Siva, E. P.
- Subjects
- *
HEAT of reaction , *HYDRAULIC couplings , *CHEMICAL reactions , *HEAT transfer coefficient , *HEAT radiation & absorption , *MASS transfer coefficients - Abstract
The present work is to discuss the effects of heat and mass transfer on oscillatory flow under the influence of couple stress fluid in wavy channel in the presence of chemical reaction. The effect of thermal radiation, buoyancy, chemical reaction parameter and heat source parameter on the couple stress fluid were taken into Considerations with varying temperature, concentration and slip boundary condition. The fluid is assumed to be electrically conducting in the presence of externally applied uniform magnetic field. The analytical solutions in closed form are obtained for momentem, energy and concentration equations. The effect of various parameters on the fluid velocity, temperature and concentration are analysed using graphs. The rate of heat and mass transfer coefficients at the walls are calculated. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
29. Effect of Chemical Reaction on Oscillatory Flow Through Porous Medium with Mass Transfer and Heat Source.
- Author
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Juliet, S. Sheeba, Vidhya, M., Govindarajan, A., and Siva, E. P.
- Subjects
- *
OSCILLATING chemical reactions , *MASS transfer , *CHEMICAL reactions , *POROUS materials , *HEAT transfer , *SLIP flows (Physics) - Abstract
We investigate the effect on the unsteady oscillatory flow through a vertical channel with non-uniform wall temperature. The fluid is subjected to the chemical reaction with mass transfer and the velocity slip through the porous medium is taken into consideration. Exact solutions, governing the fluid flow of the dimensionless equations are obtained and the effects of the flow parameters with substance responses and mass exchange on temperature, speed profiles, skin erosion and rate of warmth exchange are examined and appeared. It is seen that skin erosion increments on both channel plates as infusion increments on the warmth source. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
30. Mass Transfer Effects on Flow Over a Vertical Plate Oscillating in Porous Plate in the Presence of Transverse Magnetic Field.
- Author
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Niranjana, N., Vidhya, M., Govindarajan, A., Siva, E. P., and Priyadarshini., E.
- Subjects
- *
MASS transfer , *MAGNETIC fields , *PRANDTL number , *FREE convection , *GRASHOF number , *SURFACE temperature - Abstract
This present paper investigates the impact of radiation on liquid stream and warmth and mass exchange over a vertically swaying permeable level plate installed in permeable medium with wavering surface temperature. Mass transfer effects are added into the governing equations. The analytic solutions of the velocity, temperature and concentration profiles are obtained. The effect of physical parameters Prandtl number Pr, Grashof number Gr, Suction parameter S, Magnetic parameter, Darcy number and radiation parameter R, Schmidt number Sc, Modified Grshof number Gc on the velocity, temperature and concentration profiles are analysed and the results are depicted through graph. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
31. Effects of Thermal Diffusion and Mass Transfer on Oscillatory Flow through Porous Medium in the Presence of Magnetic Field with Heat Source.
- Author
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Niranjana, N., Vidhya, M., Govindarajan, A., Siva, E. P., and Priyadarshini, E.
- Subjects
- *
MASS transfer , *POROUS materials , *DIFFUSION , *MAGNETIC fields , *NUSSELT number , *FREE convection , *RADIATIVE transfer equation - Abstract
This paper deals with the combined effect mass transfer and sorect effect for the oscillatory flow in the transverse attractive field and radiative warmth exchange to shaky stream of a directing optically dainty liquid through a channel recorded with immersed permeable medium and non-uniform dividers temperature. The thermal diffusion and mass transfer effects are added into the governing equations and the results are obtained through petribution technique. Various parameters like Grashof number, Modified Grashof number, Magnetic parameter, Radiation parameter, Peclet number, Darcy number, Heat source parameter, Chemical reaction parameter, Porous medium parameter, Schmidt number, Thermal diffusion parameter are all discussed, and results are analyzed by s graphs for velocity temperature and concentration profiles. The rate of skin friction and Nusselt number are also discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
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32. Impact of temperature on the properties of MoS2 nanoflakes synthesized by facile hydrothermal method for electrochemical supercapacitor applications.
- Author
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Vidhya, M., Selvakumari, T.M., Marnadu, R., Ashraf, I.M., and Shkir, Mohd.
- Subjects
- *
SUPERCAPACITOR electrodes , *SUPERCAPACITOR performance , *CYCLIC voltammetry , *CHARGE transfer , *CHEMICAL bonds , *CRYSTAL structure - Abstract
[Display omitted] • The hexagonal crystal structure was observed by XRD. • The nanoflakes and flower-like structure were obtained using FESEM analysis. • The electrode material prepared with 160 °C temperature exhibits excellent super capacitive performances. • A maximum specific capacitance of 691 Fg−1 at current density 1 Ag−1 and good cyclic stability of 89 % over 5000 cycles. This work describes the formation of two-dimensional Molybdenum di-sulfide (MoS 2) nanoflakes developed by temperature varying hydrothermal method from 140 °C to 200 °C and further applied as effective electrode material for high performance supercapacitor. The structural analysis confirms the formation of hexagonal crystal structure of MoS 2 by XRD. The surface morphological study revealed uniform growth of MoS 2 nanoflakes and flower-like structure. The chemical bonding and the location of Mo-S band was confirmed at 600 cm−1 through FTIR–spectrum. The electrochemical performances of the MoS 2 electrode were analyzed by Cyclic Voltammetry, Galvanostatic Charge/discharge and electrochemical impedance techniques. The electrode material prepared at 160 °C temperature exhibits excellent super capacitive performances when compared to other temperatures. This electrode recorded a maximum specific capacitance of 691 Fg−1 at current density 1 Ag−1 and good cyclic stability of 89 % over 5000 cycles. It exhibits very less charge transfer resistance 1 Ω which is lesser than other electrodes. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
33. Spatially resolved multi-omics deciphers bidirectional tumor-host interdependence in glioblastoma.
- Author
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Ravi, Vidhya M., Will, Paulina, Kueckelhaus, Jan, Sun, Na, Joseph, Kevin, Salié, Henrike, Vollmer, Lea, Kuliesiute, Ugne, von Ehr, Jasmin, Benotmane, Jasim K., Neidert, Nicolas, Follo, Marie, Scherer, Florian, Goeldner, Jonathan M., Behringer, Simon P., Franco, Pamela, Khiat, Mohammed, Zhang, Junyi, Hofmann, Ulrich G., and Fung, Christian
- Subjects
- *
GLIOBLASTOMA multiforme , *HUMAN stem cells , *ASTROCYTES ,CENTRAL nervous system tumors - Abstract
Glioblastomas are malignant tumors of the central nervous system hallmarked by subclonal diversity and dynamic adaptation amid developmental hierarchies. The source of dynamic reorganization within the spatial context of these tumors remains elusive. Here, we characterized glioblastomas by spatially resolved transcriptomics, metabolomics, and proteomics. By deciphering regionally shared transcriptional programs across patients, we infer that glioblastoma is organized by spatial segregation of lineage states and adapts to inflammatory and/or metabolic stimuli, reminiscent of the reactive transformation in mature astrocytes. Integration of metabolic imaging and imaging mass cytometry uncovered locoregional tumor-host interdependence, resulting in spatially exclusive adaptive transcriptional programs. Inferring copy-number alterations emphasizes a spatially cohesive organization of subclones associated with reactive transcriptional programs, confirming that environmental stress gives rise to selection pressure. A model of glioblastoma stem cells implanted into human and rodent neocortical tissue mimicking various environments confirmed that transcriptional states originate from dynamic adaptation to various environments. [Display omitted] • Five spatially distinct transcriptional programs are identified in glioblastomas • Hypoxia induces defined transcriptional and genomic responses, including CNAs • Immunosuppressive tumor-myeloid cell interactions are enhanced in segregated niches • Non-stress environments support subtype transition towards developmental stages Ravi et al. employ spatially resolved multi-omics in glioblastoma samples and identify segregated niches hallmarked by immunological and metabolic stress factors. These spatial niches are influenced by the tumor microenvironment and reflect transcriptional adaptations to inflammatory or metabolic stimuli and recapitulate neural developmental stages. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
34. Prediction of CVD using binary logistic regression.
- Author
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Florence, M. Mary Victoria, Priyadarshini, E., Vidhya, M., and Govindarajan, A.
- Subjects
- *
LOGISTIC regression analysis , *HEART diseases , *DEPENDENT variables , *FORECASTING , *INDEPENDENT variables - Abstract
One of the popular method for prediction of medical related data is Binary Logistic Regression. This method helps in understanding the relation between the independent variables and the dependent variable and to explore the relationship between them. The aim of this paper is to build a binary logistic model by identifying the various factors that trigger the heart disease of a person.The various factors influencing the heart disease of a person was computed and the performance of this method were evaluated based on standard statistical measures such as MAE, MAPE, RMSE, etc. The results obtained shows that BLR model can be used to monitor the heart disease conditions satisfactorily. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
35. Oral biopsy: Oral pathologist's perspective.
- Author
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Kumaraswamy, K. L., Vidhya, M., Rao, Prasanna Kumar, and Mukunda, Archana
- Subjects
- *
BIOPSY , *ORAL disease diagnosis , *PATHOLOGISTS , *HISTOLOGY , *DIAGNOSTIC imaging , *POSTOPERATIVE period - Abstract
Many oral lesions may need to be diagnosed by removing a sample of tissue from the oral cavity. Biopsy is widely used in the medical field, but the practice is not quite widespread in dental practice. As oral pathologists, we have found many artifacts in the tissue specimen because of poor biopsy technique or handling, which has led to diagnostic pitfalls and misery to both the patient and the clinician. This article aims at alerting the clinicians about the clinical faults arising preoperatively, intraoperatively and postoperatively while dealing with oral biopsy that may affect the histological assessment of the tissue and, therefore, the diagnosis. It also reviews the different techniques, precautions and special considerations necessary for specific lesions. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
36. Human papilloma virus and oral infections: An update.
- Author
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Kumaraswamy, K. L. and Vidhya, M.
- Subjects
- *
PAPILLOMAVIRUSES , *MOUTH infections , *MUCOUS membrane diseases , *SKIN diseases , *ETIOLOGY of cancer - Abstract
Human papilloma virus (HPV) is one of the most common virus groups affecting the skin and mucosal areas of the body in the world today. It is also a known fact that HPV causes many lesions in the oral cavity. The most common conditions induced by oral HPV infection are usually benign-like oral papillomas, oral condylomas, and focal epithelial hyperplasia. Oral HPV infection has been found to be associated with some cases of oropharyngeal cancer, but it is not the main risk factor for this kind of cancer. HPV is been proved to be the causative agent in causation of cervical cancers without doubt, but its role as a etiologic agent in causing oral cancers needs to be evaluated and studied more to come into any conclusion. We have used review papers, case reports, cohort studies, case control studies, and various internet sources published from 1960 to 2011 to prepare this review of literature. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
37. Anti-cancer applications of Zr, Co, Ni-doped ZnO thin nanoplates.
- Author
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Sangeetha Vidhya, M., Ameen, Fuad, Dawoud, Turki, Yuvakkumar, R., Ravi, G., Kumar, P., and Velauthapillai, Dhayalan
- Subjects
- *
CANCER cell growth , *NUCLEAR fragmentation , *DOPING agents (Chemistry) , *VALENCE bands , *OPTICAL materials - Abstract
• Ni-ZnO is impressive in hampering breast cancer cells growth. • Ni-ZnO revealed nuclear condensation and fragmentation. • Ni-ZnO is worth enough to serve as an anticancer drug. Nanostructured zinc oxide received much attention with its distinctive properties. Undoped and doped ZnO formation by hydrothermal route was summarized. ZnO hexagonal structure was confirmed by sharp X-ray diffraction peak corresponding to crystalline plane (1 0 1), and doped ZnO diffraction peaks have a minor shift to inferior angle by 0.6˚. FTIR confirmed Zn-O vibration band observed at 422 cm−1. The doping concentration played a vital role in materials morphology and optical properties. SEM confirmed the existence of thin uniform nanoplate surface morphology. ZnO oxygen vacancies were revealed by PL spectra, which exhibited a chief role in anticancer mechanism and activity with green emission (491 nm, 2.52 eV) originated from electrons shift between ionized oxygen vacancy and valence band. Prepared ZnO with and without dopants have been explored to reveal anticancer applications, and obtained results are more suitable for real-time applications. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
38. Energy storage performance of CoNiSe2 nanostructures.
- Author
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Sangeetha Vidhya, M., Ravi, G., Yuvakkumar, R., Thambidurai, M., Dang, Cuong, Pannipara, Mehboobali, Al-Sehemi, Abdullah G., and Velauthapillai, Dhayalan
- Subjects
- *
ELECTRODE performance , *SUPERCAPACITOR performance , *ELECTRODE potential , *CHARGE transfer kinetics , *FUNCTIONAL groups , *SUPERCAPACITORS - Abstract
• Improved specific capacitance of 365 Fg−1 at 1 Ag−1 was achieved. • Outstanding 99% cyclabilty even after 5000 cycles was achieved. • Product explored enhanced stability. Electrode material potential evolution is a proficient and vast challenge to deliver improved electrochemical performance in supercapacitors. This work reports a combination of ternary selenide (CoNiSe 2) electrode performance. Different surfactant effect seems to boost up prepared electrode performance. Hexagonal structured CoNiSe 2 revealed sharp XRD peak at 33.4° (1 0 1) plane and explored crystalline phase purity. FTIR uphold functional O–H group and a metal complex. The sharp band at 476 cm−1 ascribed to Se bonding with the obtained product. PEG-1000 influence on ternary selenide elucidates charge transfer kinetics between energy levels among CTAB and HMTA. The electrode shows outstanding energy storage capacities with 99% of cyclability long-lasting even after 5000 cycles. The ternary selenide using PEG 1000 assisted surfactant experiences enhanced stability with an improved capacitance of 365 Fg−1 at 1 Ag−1. Among surfactants, PEG 1000 assisted CoNiSe 2 showed excellent performance and proves the product is well suitable for the storage applications. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
39. Modeling and forecasting using auto regressive integrated moving average.
- Author
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Priyadarshini, E., Preethi, E. Sharon, Vidhya, M., Chakkravarthi, Samuel, and Govindarajan, A.
- Subjects
- *
MOVING average process , *FORECASTING , *AUTOREGRESSIVE models , *BOX-Jenkins forecasting , *STATISTICS - Abstract
In this paper ,Autocorrelation (ACF) and Partial autocorrelation (PACF) functions had been envisioned to help in identifying appropriate orders of the Autoregressive model of order p (AR) and Moving Average model of order q (MA). The Bayesian Information Criteria (BIC) test was done on numerous models and it was found the model ARIMA (1, 1, 0) has the least BIC value. Ljung Q statistics data showed that there was no serial correlation across all the models. The standard error measures such as MSE, MAE, MAPE was calculated for the forecasting rates and was found to be minimal. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
40. Functional reduced graphene oxide/cobalt hydroxide composite for energy storage applications.
- Author
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Vidhya, M. Sangeetha, Ravi, G., Yuvakkumar, R., Velauthapillai, Dhayalan, Thambidurai, M., Dang, Cuong, Saravanakumar, B., Syed, Asad, and M.S. Dawoud, Turki
- Subjects
- *
COBALT hydroxides , *ENERGY storage , *GRAPHENE oxide , *HYDROXIDES , *ELECTROCHEMICAL electrodes , *COMPOSITE structures - Abstract
• Unique layered structural property enhanced electrochemical performance. • Increased specific capacitance of 1100 Fg−1 at 0.5 A/g at 0.5 V. • Better rate capability and stability achieved within studied range. • Product explored enhanced stability and retains 98.1% after 2000 cycles. Material storage property enrichment with good electrochemical performance is a foremost challenge. Cobalt hydroxide and reduced graphene oxide (rGO) composite synthesized via chemical precipitation method showed improved specific capacitance and cycle stability. The unique rGO layered structure in composite enhanced overall electrochemical performance. Raman spectra revealed disordered rGO structure and A 1g mode of Co(OH) 2 in composite. rGO/Co(OH) 2 electrode showed increased specific capacitance of 1100 Fg−1 at 0.5 Ag−1 with better rate capability and good stability (98.1%) after 2000 cycles. These results proved that rGO/Co(OH) 2 is a perfect electrode for electrochemical energy storage applications. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
41. Hybrid forecasting model for non-linear time series.
- Author
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Priyadarshini, E., Gayathri, G. Raj, Vidhya, M., Govindarajan, A., Chakkravarthi, Samuel, Govindarajan, A, Balaji, N, Gajendran, G, and Behra, Harekrushna
- Subjects
- *
TIME series analysis , *U.S. dollar , *FUTURES sales & prices , *FOREIGN exchange , *INDIAN rupee , *BOX-Jenkins forecasting - Abstract
This paper brings out a contrast among Networking Model, Auto Regressive Moving Average Model, combinational models of ANN and ARIMA in forecasting the future exchange prices for US Dollar (USD) / Indian Rupees (INR). Simulation effects of combination models were taken in comparision with outcomes of ANN based ARIMA based models. Experimental results reveal that hybrid version of ANN and ARIMA can closely forecast the foreign exchange marketplace. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
42. Effect of Mass Transfer and Slip Effect on Viscoelastic Fluid In A Vertical Channel With Heat Source and Radiation.
- Author
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Govindarajan, A., Rajesh, K., Vidhya, M., and Siva, E. P.
- Subjects
- *
MASS transfer , *RADIATION sources , *HEAT radiation & absorption , *FREE convection , *SLIP flows (Physics) , *REYNOLDS number , *GRASHOF number - Abstract
In this paper an oscillatory stream of anelectrically and viscoelasticleading liquid through a porous medium limited by two interminable vertical similar plates is talked about within the sight of heat source and radiation with impact of mass transfer and slip parameter. One of these plates is exposed to a slip-stream condition and other to a no-slip condition. The weight inclination in the channel wavers with time. An attractive field of uniform quality is connected toward the path opposite to the plates. The initiated attractive field is disregarded because of suspicion of little attractive Reynolds number. The temperature contrast of the two plates is additionally accepted sufficiently high to instigate heat transfer because of radiation. A shut form investigative answer for the issue is acquired. The investigative outcomes are assessed statistically and afterward exhibited graphically to talk about in part the impacts of various relevant constraints going into the issue. It is established that the speed profiles increment because of increment in Reynolds number or there is increment in Grashof number for mass transfer and a switch number is noted on the profiles of the speed at whatever point there is an expansion in either attractive parameter or heat source parameter. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
43. Effect of mass transfer and chemical reaction on mixed convection periodic flow in a rotating channel in the presence of MHD and radiation.
- Author
-
Rajesh, K., Govindarajan, A., Vidhya, M., and Siva, E. P.
- Subjects
- *
MASS transfer , *CHEMICAL reactions , *CHANNEL flow , *RADIATION , *REYNOLDS number , *CONVECTIVE flow - Abstract
Magneto hydrodynamic (MHD) varied convection stream of a thick, incompressible and electrically directing liquid in a perpendicular channel is examined logically. An attractive field of uniform quality is connected opposite to the planes of the channel dividers. The liquid is followed up on by an intermittent variety of the weight angle the vertically upward way. The temperature of one of the plates is non-uniform and the temperature complexity of the dividers of the channel is adequately high to prompt warmth exchange in light of radiation. The liquid and the divert turn as one with a precise speed about the hub ordinary to the plates of the channel. An careful logical arrangement of the issue is gotten. It is found that the speed profiles decrease because of increase in either Reynolds number (or) Hartmann number (or) radiation parameter. The temperature profiles increases steadily due to either in radiation parameter concentration profiles increase because of increase in rotation parameter (or) Schmidt number (or) chemical reaction parameter. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
44. Helical unwinding and side-chain unlocking unravel the outward open conformation of the melibiose transporter.
- Author
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Wang, Li-Ying, Ravi, Vidhya M., Leblanc, Gérard, Padrós, Esteve, Cladera, Josep, and Perálvarez-Marín, Alex
- Published
- 2016
- Full Text
- View/download PDF
45. Pro-inflammatory cytokine and apoptotic gene mRNA levels against lentogenic and velogenic Newcastle disease virus pathotypes in in-vivo and in-vitro biological systems.
- Author
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Rajasekaran, Ranjani, Kirubaharan, J. John, Vidhya, M., Shilpa, P., and Joy Chandran, N. Daniel
- Subjects
- *
NEWCASTLE disease virus , *BIOLOGICAL systems , *CHICKEN embryos , *CHICKEN diseases , *MESSENGER RNA , *TUMOR necrosis factors , *GENES , *SYMPTOMS - Abstract
Knowledge on the influence of pro-inflammatory cytokine and apoptotic gene mRNA levels in the pathogenesis of Indian field isolates of Newcastle disease virus (NDV) is little. In this study, cytokine mRNA levels were elucidated in spleen of chickens (in-vivo) and chicken embryo fibroblast cells (in-vitro) infected with lentogenic D58 strain and viscerotropic velogenic D165 isolate until five days post infection (dpi). In spleen of chickens infected with D165, maximum upregulation of pro-inflammatory cytokines (IL-1β, IL-6, TNF-α), chemokine (IL-8) and apoptotic gene (Caspase-8) at 3dpi correlated with the onset of severe clinical signs and necrotic histopathological lesions in spleen, proventriculus, intestine and caecal tonsil of chickens. Similarly, in CEF cells infected with D165, upregulation of pro-inflammatory cytokine and apoptotic gene mRNA levels correlated with the appearance of CPE. In spleen of chickens and CEF cells infected with D58, there was comparatively minimal upregulation of pro-inflammatory cytokine and apoptotic gene mRNA levels which did not cause histopathological changes in tissues and CPE formation in CEF cells. In both in-vivo and in-vitro systems, upregulation of anti-inflammatory cytokine IL-10 showed inhibitory effects on the mRNA levels of pro-inflammatory cytokines. Thus, this study reports variation in the cytokine mRNA levels elucidated in response to two different pathotypes isolated from India and associates the same with the clinical signs and pathological lesions produced during the course of ND. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
46. Fuzzy Generalized Semiopen Functions using Contra Semiopen.
- Author
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Victoria Florence, M. Mary, Priyadarshini, E., Vidhya, M., and Govindarajan, A.
- Subjects
- *
TOPOLOGICAL spaces , *TOPOLOGY - Abstract
The authors introduced the concept of generalized semiclosed sets and generalized semiopen sets in topology. Later R.Devi[4] et al have defined and studied the concept of generalized semiopen functions and generalized semiclosed functions in between topological spaces. The aim of this paper is to introduce a new class of functions called fuzzy contra generalized semiopen functions using generalized semiopen functions. We also define and study the class of functions called fuzzy pgs open, fuzzy contra pgs open, fuzzy always contra pgs open and their basic characterizations. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
47. 'Hippocampal innate inflammatory gliosis only' in pharmacoresistant temporal lobe epilepsy.
- Author
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Grote, Alexander, Heiland, Dieter-Henrik, Taube, Julia, Helmstaedter, Christoph, Ravi, Vidhya M, Will, Paulina, Hattingen, Elke, Schüre, Jan-Rüdiger, Witt, Juri-Alexander, Reimers, Annika, Elger, Christian, Schramm, Johannes, Becker, Albert J, and Delev, Daniel
- Subjects
- *
TEMPORAL lobectomy , *TEMPORAL lobe epilepsy , *EPILEPSY , *GLIOSIS , *PARTIAL epilepsy , *HIPPOCAMPUS (Brain) , *PEOPLE with epilepsy - Abstract
Drug-resistant mesial-temporal lobe epilepsy is a devastating disease with seizure onset in the hippocampal formation. A fraction of hippocampi samples from epilepsy-surgical procedures reveals a peculiar histological pattern referred to as 'gliosis only' with unresolved pathogenesis and enigmatic sequelae. Here, we hypothesize that 'gliosis only' represents a particular syndrome defined by distinct clinical and molecular characteristics. We curated an in-depth multiparameter integration of systematic clinical, neuropsychological as well as neuropathological analysis from a consecutive cohort of 627 patients, who underwent hippocampectomy for drug-resistant temporal lobe epilepsy. All patients underwent either classic anterior temporal lobectomy or selective amygdalohippocampectomy. On the basis of their neuropathological exam, patients with hippocampus sclerosis and 'gliosis only' were characterized and compared within the whole cohort and within a subset of matched pairs. Integrated transcriptional analysis was performed to address molecular differences between both groups. 'Gliosis only' revealed demographics, clinical and neuropsychological outcome fundamentally different from hippocampus sclerosis. 'Gliosis only' patients had a significantly later seizure onset (16.3 versus 12.2 years, P = 0.005) and worse neuropsychological outcome after surgery compared to patients with hippocampus sclerosis. Epilepsy was less amendable by surgery in 'gliosis only' patients, resulting in a significantly worse rate of seizure freedom after surgery in this subgroup (43% versus 68%, P = 0.0001, odds ratio = 2.8, confidence interval 1.7–4.7). This finding remained significant after multivariate and matched-pairs analysis. The 'gliosis only' group demonstrated pronounced astrogliosis and lack of significant neuronal degeneration in contrast to characteristic segmental neuron loss and fibrillary astrogliosis in hippocampus sclerosis. RNA-sequencing of gliosis only patients deciphered a distinct transcriptional programme that resembles an innate inflammatory response of reactive astrocytes. Our data indicate a new temporal lobe epilepsy syndrome for which we suggest the term 'Innate inflammatory gliosis only'. 'Innate inflammatory gliosis only' is characterized by a diffuse gliosis pattern lacking restricted hippocampal focality and is poorly controllable by surgery. Thus, 'innate inflammatory gliosis only' patients need to be clearly identified by presurgical examination paradigms of pharmacoresistant temporal lobe epilepsy patients; surgical treatment of this subgroup should be considered with great precaution. 'Innate inflammatory gliosis only' requires innovative pharmacotreatment strategies. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
48. Delivery of a Holstein-Friesian calf with multiple skeletal abnormalities.
- Author
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Varalakshmi, S., Vidhya, M., Sathya, A., Venkatesh, G., Balasubramanian, S., Jayaprakash, R., and Devanathan, T.G.
- Subjects
- *
HOLSTEIN-Friesian cattle , *MUSCULOSKELETAL system , *ANIMAL diseases , *FAMILIAL diseases , *PARTURITION , *VETERINARY medicine - Abstract
Describes the delivery of a Holstein-Friesian calf diagnosed with multiple skeletal abnormalities. Recognition of the familial syndrome of Holstein calves of complex vertebral malformations; Cow symptoms on presentation prior to birthing; Stabilization of the animal with intravenous fluids; Efforts to ensure passage through the birth canal; Determination of the presentation, position and posture of the fetus; Delivery procedure.
- Published
- 2004
- Full Text
- View/download PDF
49. Synthesis and characterization of epoxy–silicone–polythiophene interpenetrating polymer network for corrosion protection of steel
- Author
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Palraj, S., Selvaraj, M., Vidhya, M., and Rajagopal, G.
- Subjects
- *
EPOXY compounds , *SILICONES , *POLYTHIOPHENES , *POLYMER networks , *STEEL corrosion , *SURFACE coatings , *CORROSION resistant materials , *ALLOYS - Abstract
Abstract: Polymer alloys, particularly interpenetrating polymer networks (IPNs) exhibit excellent coating properties. Often combination of polymers result in IPNs with controlled morphologies and synergistic behavior. In this study, corrosion-resistant IPNs were prepared from immiscible resins (epoxy, silicone and thiophene) using a cross-linking agent and a catalyst. GPC, FTIR, NMR, TG, DTA and SEM studies used to fix the best performing IPN. Surface morphology studies using SEM confirm the incorporation of silicone and polythiophene in to the epoxy polymer to form homogeneously micro structured IPN. The heat-resistance of the IPN was determined as per ASTM 2485. The improved corrosion resistance of the IPN was evaluated by AC impedance measurements. [Copyright &y& Elsevier]
- Published
- 2012
- Full Text
- View/download PDF
50. Structural, Optical, and Magnetic Properties of Mn-Doped Nickel Ferrite (Ni1-xMnxFe2O4) Thin Films Deposited by Jet Nebulizer Spray Pyrolysis Technique.
- Author
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Sasikumar, K., Bharathikannan, R., Sujithkumar, G., Raja, S., Arputhavalli, G. Johnsy, Vidhya, M., Marnadu, R., and Suresh, R.
- Subjects
- *
NICKEL ferrite , *THIN films , *MAGNETIC properties , *NEBULIZERS & vaporizers , *MAGNETIC films , *PYROLYSIS , *NICKEL films , *ZINC oxide films - Abstract
In this work, pure and Mn-doped nickel ferrite (Ni1-xMnxFe2O4, x = 0, 3, 6, 9, and 12 wt%) thin films were prepared using facile nebulizer spray pyrolysis technique. The effect of Mn concentration on the structural, optical, and magnetic properties was studied. The XRD pattern confirms the cubic spinel structure of Ni1-xMnxFe2O4 thin films and reveals the preferred orientation along the (311) direction for each film. Moreover, the average crystallite size (D) is found to increase from 13 to 30 nm with increasing Mn concentration. The FESEM micrographs exhibit randomly arranged plate-like and rice-like grains. The elements such as Mn, Ni, Fe, and O are confirmed by the EDX analysis. The optical band gap energy (Eg) varies between 2.90 and 3.60 eV. The Ni1-xMnxFe2O4 film prepared with 3 wt% of Mn exhibits superior ferrimagnetic behavior with the highest value of ηB (57.31) due to the high crystallinity, packing density, and smooth surface of the film. The present work shows that the facile nebulizer spray pyrolysis technique can produce high-quality Ni1-xMnxFe2O4 thin films with good magnetic properties. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
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