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Maximum Power Enhancement Under Partial Shadings Using a Modified Sudoku Reconfiguration

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cSEE Journal of Power and Energy Systems 2021年第6期7卷 1187-1201页

作者： Kandipati Rajani Tejavathu ramesh the Electrical Engineering Department National Institute of Technology Andhra PradeshWest Godavari-534101India

Partial shading is one of the important factors in reducing maximum power generation from PV(Photovoltaic)*** power generation can be improved by selecting a PV array through a Total-cross-Tied(T-c-T)***,maximum power generated from T-c-T can still be improved by distribution of shading over various *** to distribution of shading,the current entering the node increases and results in improved maximum power *** can be done effectively by using Sudoku reconfiguration *** techniques are economical,since they don’t require any sensors and switching *** technique only changes the physical location of the PV panel but the electrical connection between the panels remains the *** paper proposes a Modified Sudoku reconfiguration pattern which enhances the maximum power from the T-c-T connected PV ***,the theoretical calculation of row current and power output have been done for existing and proposed topologies under various shading *** performance of the proposed pattern has been analyzed and compared using specifications,such as Global Maximum Power(GMP),Fill Factor(FF),mismatch losses,and *** the results,it can be concluded that the Modified Sudoku reconfiguration enhances the GMP under all shading conditions.

关键词： Efficiency fill factor global maximum power point mismatch losses partial shadings PV array reconfiguration shading patterns sudoku and total-cross-tied

Why is graphene an extraordinary material? A review based on a decade of research

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Frontiers of Materials Science 2022年第2期16卷 1-39页

作者： Sachin Sharma Ashok KUMAR Shahid BASHIR Kasi ramesh Subramaniam ramesh centre for Ionics University of Malaya Department of PhysicsFaculty of ScienceUniversiti MalayaKuala Lumpur 50603Malaysia Higher Institution centre of Excellence(HIcoE) UM Power Energy Dedicated Advanced Centre(UMPEDAC)Level 4Wisma R&DUniversiti MalayaJalan Pantai BaharuKuala Lumpur 59990Malaysia

During this decade,graphene which is a thin layer of carbon material along at ease with synthesis and functionalization has become a hot topic of research owing to excellent mechanical strength,very good current density,high thermal conductivity,superior electrical conductivity,large surface area,and good electron *** research on graphene has exponentially accelerated specially when Geim and Novoselov developed and analyzed *** this basis,for industrial application,researchers are exploring different techniques to produce high-quality ***,reviewed in this article is a brief introduction to graphene and its derivatives along with some of the methods developed to synthesize graphene and its prospective applications in both research and *** this work,recent advances on applications of graphene in various fields such as sensors,energy storage,energy harvesting,high-speed optoelectronics,supercapacitors,touch-based flexible screens,and organic light emitting diode displays have been summarized.

关键词： graphene graphene oxide electrochemical sensor fuel cell supercapacitor dye-sensitized fuel cell lithium battery energy storage

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A Novel Triple-tied-cross-linked PV Array configuration with Reduced Number of cross-ties to Extract Maximum Power Under Partial Shading conditions

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cSEE Journal of Power and Energy Systems 2021年第3期7卷 567-581页

作者： Tejavathu ramesh Kandipati Rajani Anup Kumar Panda Department of Electrical Engineering National Institute of Technology RourkelaIndia Department of Electrical and Electronics Engineering National Institute of Technology Andhra PradeshIndia

Partial shadings cause output power reduction from Photovoltaic(PV)arrays due to mismatch *** selection of PV array configurations play a vital role in maximum power *** paper proposes a novel Triple-Tied-cross-Linked(T-T-c-L)configuration to extract maximum power with a lesser number of cross ties than a Total-cross-Tied(T-c-T)*** performance of the proposed T-T-c-L configuration has been compared with various conventional PV array configurations,such as Series(S),Parallel(P),Series-Parallel(S-P),Bridge-Link(B-L),Honey-comb(H-c),and T-c-T under Partial Shading conditions(PScs)by considering the 9×9 PV *** PScs considered are uneven row,column,diagonal,random,short&narrow,short&wide,long&narrow,long&wide shadings and uniform half module *** measures,such as open circuit voltage,short circuit current,maximum power,voltages and currents at maximum power,mismatch losses,fill factor and efficiency have been used for performance analysis of various *** the results,it can be concluded that the performance of the proposed T-T-c-L configuration is optimal compared to other configurations.

关键词： Efficiency fill factor maximum power point mismatch losses partial shading conditions PV array configurations triple-tied-cross-linked

Synthesis, characterization and biocompatibility studies of zinc oxide(ZnO) nanorods for biomedical application

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Nano-Micro Letters 2010年第1期2卷 31-36页

作者： R.Gopikrishnan K.Zhang P.Ravichandran S.Baluchamy V.ramesh S.Biradar P.ramesh J.Pradhan J.c.Hall A.K.Pradhan G.T.ramesh Molecular Toxicology Laboratory Center for Biotechnology and Biomedical Sciences Norfolk State University center for Materials Research Norfolk State University Health Science Academy Bayside High School Virginia Beach

Nanoparticles are increasingly being recognized for their potential utility in biological applications including ***,we have synthesized zinc oxide(ZnO)nanorods using zinc acetate and hexamethylenetetramine as precursors followed by characterizing using X-ray diffraction,fourier transform infrared spectroscopy,scanning electron microscopy and transmission electron *** growth of synthesized zinc oxide nanorods was found to be very close to its hexagonal nature,which is confirmed by X-ray *** nanorod was grown perpendicular to the long-axis and grew along the[001]direction,which is the nature of ZnO *** morphology of synthesized ZnO nanorods from the individual crystalline nucleus was confirmed by scanning and transmission electron *** length of the nanorod was estimated to be around 21 nm in diameter and 50 nm in *** toxicology studies showed that synthesized ZnO nanorods exposure on hela cells has no significant induction of oxidative stress or cell death even in higher concentration(10μg/ml).The results suggest that ZnO nanorods might be a safer nanomaterial for biological applications.

关键词： Zinc oxide [ZnO] Nanorods XRD SEM & TEM cytotoxicity

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Bioconvective nanofluid flow over an exponential stretched sheet with thermophoretic particle deposition

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Propulsion and Power Research 2023年第2期12卷 284-296页

作者： B.c.Prasannakumara J.K.Madhukesh G.K.ramesh Department of Studies in Mathematics Davangere UniversityDavangereKarnataka 577002India Department of Mathematics K.L.E.Society’s J.T.CollegeGadagKarnataka 582101India Department of Mathematics Amrita School of EngineeringAmrita Vishwa VidyapeethamBengaluruIndia

The current work is being done to investigate the flow of nanofluids across a porous exponential stretching surface in the presence of a heat source/sink,thermophoretic particle deposition,and *** collection of PDEs(partial differential equations)that represent the fluid moment is converted to a system of ODEs(ordinary differential equations)with the use of suitable similarity variables,and these equations are then numerically solved using Runge Kutta Fehlberg and the shooting *** different physical limitations,the numerical results are visually *** results show that increasing the porosity characteristics reduces *** mass transfer decreases as the thermophoretic limitation *** in the porosity parameter reduce skin friction,increases in the solid volume fraction improve the rate of thermal distribution,and increases in the thermophoretic parameter increase the rate of mass transfer.

关键词： Exponential stretching sheet Nanofluid Heat source/sink Thermophoretic particle deposition Bio convection

Bio-Marangoni convection flow of casson nanoliquid through a porous medium in the presence of chemically reactive activation energy

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Applied Mathematics and Mechanics(English Edition) 2021年第8期42卷 1191-1204页

作者： J.K.MADHUKESH G.K.ramesh B.c.PRASANNAKUMARA S.A.SHEHZAD F.M.ABBASI Department of Mathematics Davangere UniversityDavangere 577007India Department of Mathematics K.L.E.Society’s J.T.CollegeGadag 582101India Department of Mathematics COMSATS University IslamabadSahiwal 57000Pakistan

Bioconvection research is primarily focused on the augmentation of energy and mass species,which has implications in the processes intensification,mechanical,civil,electronics,and chemical engineering *** bioconvection technology sectors include cooling systems for electronic devices,building insulation,and geothermal nuclear waste ***,the present investigation is mainly discoursing the impact of Marangoni convention casson nanoliquid flow under gyrotactic microorganisms over the porous *** partial differential equations(PDEs)are re-structured into ordinary differential equations(ODEs)via suitable similar *** ODEs are numerically solved with the help of the spectral relaxation method(SRM).The numerical outcomes are illustrated graphically for various parameters over velocity,temperature,concentration,and bioconvection ***-dimensional(3 D)views of important engineering parameters are illustrated for various *** velocity of the casson nanoliquid increases with increasing the Marangoni parameter but decreases against higher porosity *** surface drag force enhances for enhancement in the Marangoni *** rate of mass transmission is higher for reaction rate constraint but diminishes for activation energy *** higher radiative values augment the rate of heat transmission.

关键词： casson nanofluid activation energy thermal radiation bioconvection Marangoni convection

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Therapeutic targeting of the androgen receptor(AR)and AR variants in prostate cancer

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Asian Journal of Urology 2020年第3期7卷 271-283页

作者： ramesh Narayanan Department of Medicine University of Tennessee Health Science CenterMemphisTNUSA

Prostate cancer(Pca)accounted for over 300000 deaths world-wide in *** of the Pca deaths occurred due to the aggressive castration-resistant Pca(cRPc).Since the androgen receptor(AR)and its ligands contribute to the continued growth of androgendependent Pca(ADPca)and cRPc,AR has become a well-characterized and pivotal *** AR signaling was identified as therapeutic-target in Pca over five-decades ago,there remains several practical issues such as lack of antagonist-bound AR crystal structure,stabilization of the AR in the presence of agonists due to N-terminus and c-terminus interaction,unfavorable large-molecule accommodation of the ligand-binding domain(LBD),and generation of AR splice variants that lack the LBD that impede the discovery of highly potent fail-safe *** review summarizes the AR-signaling pathway targeted therapeutics currently used in Pca and the approaches that could be used in future ARtargeted drug development of potent next-generation *** review also outlines the discovery of molecules that bind to domains other than the LBD and those that inhibit both the full length and splice variant of ARs.

关键词： Androgen receptor(AR) AR variants Prostate cancer AR antagonists AR ligand binding domain AR activation function-1 domain castration-resistant prostate cancer

Atomic crosschain Transactions for Ethereum Private Sidechains

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Blockchain(Research and Applications) 2022年第1期3卷 23-39页

作者： Peter Robinson Raghavendra ramesh Sandra Johnson consenSys Software R&D Brisbane4520Australia School of Information Technology and Electrical Engineering The University of QueenslandQueensland 4072Australia ARc centre of Excellence for Mathematical and Statistical Frontiers(AcEMS) Queensland University of TechnologyQueensland 4001Australia

The Atomic crosschain Transaction for Ethereum Private Sidechains protocol allows composable programming across permissioned Ethereum *** allows for inter-contract and inter-blockchain function calls that are both synchronous and atomic:if one part fails,the whole call tree of function calls is *** protocol is not based on existing techniques such as Hash Time Locked contracts,relay chains,block header transfer,or trusted *** uses(a)threshold signatures to prove values across blockchains,(b)coordination contracts to manage the state of crosschain transactions,and(c)a function call tree commitment scheme to allow users to commit to a call tree and then later check that the correct function calls have been *** paper analyses the processing overhead of using this technique compared to using multiple standard non-atomic single blockchain *** additional processing is analysed for four scenarios involving multiple blockchains:a Trade–Finance system,the Hotel–Train problem,a Supply chain with Provenance,and an *** protocol is shown to have both safety and liveness properties.

关键词： crosschain Blockchain Transaction Atomic Ethereum

Binder-free heterostructure(g-c3N4/PPy) based thin film on semi-flexible nickel foam via hybrid spray technique for energy storage application

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Progress in Natural Science:Materials International 2020年第3期30卷 298-307页

作者： Navaneethan Duraisamy Prabhu S ramesh R Kavitha Kandiah Department of chemistry J.K.K.Nataraja College of Arts and Science Komarapalayam 2. Department of Physics Periyar University Department of Microbiology Periyar University center for New and Renewable Energy Department of Physics Periyar University

A semi-flexible binder-free graphitic carbon nitride(g-cN) intercalated polypyrrole(PPy) nanocomposite thin film was prepared via hybrid electrospray technique. A homogeneous thin film was achieved by the controlled spray process. A deposited thin film illustrated the amorphous nature of composite with high surface purity and good chemical composition. The surface analysis confirmed the smoother surface with well-defined distinct phases of g-cNand PPy matrix in the composite thin film. The electrochemical studies exhibited that a maximum areal capacity of the thin film was achieved to be 289.6 mF/cm~2 at a current density of 0.4 mA/cm~2,which is higher than that of pristine PPy(194.8 mF/cm~2). The heterostructure electrode illustrated that the life cycles of 99% could be up to 10,000 cycles with low resistance due to the synergetic effect of g-cNand PPy matrix with strong material adhesion(hybrid spray process) on the surface. A binder-free heterostructure thin film will play a significant role in the energy storage application.

关键词： Polypyrrole G-c 3 N 4 Heterostructure Spray Thin film Electrochemical study