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Optimal Cost-Aware Paradigm for Off-Grid Green Cellular Networks in Oman

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Computers, Materials & Continua 2021年第8期68卷 2665-2680页

作者： Mohammed H.Alsharif Kannadasan Raju Abu Jahid Mahmoud A.Albreem Peerapong Uthansakul Jamel Nebhen venkatesan Chandrasekaran Department of Electrical Engineering College of Electronics and Information EngineeringSejong UniversitySeoul05006Korea Department of Electrical and Electronics Engineering Sri Venkateswara College of EngineeringSriperumbudurChennai602117India Department of Electrical and Computer Engineering University of OttawaOttawaK1N 6N5ONCanada Department of Electronics and Communications Engineering A’Sharqiyah UniversityIbra400Oman School of Telecommunication Engineering Suranaree University of TechnologyNakhon RatchasimaThailand Prince Sattam bin Abdulaziz University College of Computer Engineering and SciencesAlkharj11942Saudi Arabia

Green wireless networks or energy-efficient wireless networks have gained popularity as a research topic due to the ecological and economic concerns of cellular *** specific power supply requirements for the cellular base station,such as cost-effectiveness,efficiency,sustainability,and reliability,can be met by utilizing the technological advances in renewable *** are numerous drivers for the deployment of renewable energy technologies and the transition towards green *** energy is free,clean,and abundant in most locations throughout the ***,this work proposes a novel framework for energy-efficient solar-powered base stations for the Oman site,specifically for off-grid locations where fuel transportation for diesel generator(DG)is a serious *** demonstrate the effectiveness of the proposed system for off-grid sites,the Hybrid Optimization Model for Electric Renewables optimization software is adapted by considering real-time conditions and its technical *** cost factors such as capital cost,salvage cost,replacement cost,operational,and maintenance cost of PV panels,inverters,and batteries also undergo extensive *** the observed results,the total net present cost(NPC)of the proposed system is$27,887,while the net NPC of the DG is estimated at$32,***,the proposed scheme can potentially achieve considerable savings in the operational expenditure at approximately 15.24%.Indeed,these outcomes can provide profound economic,technical,and ecological benefits to the cellular operators of *** also ensures a sizeable reduction in greenhouse gas that supports sustainable green wireless network deployment in remote areas.

关键词： Wireless networks green wireless networks green communications sustainability OPEX

Investigation of enhancement in planar fast neutron detector efficiency with stacked structure using Geant4

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Nuclear Science and Techniques 2017年第11期28卷 154-163页

作者： Shivang Tripathi Chandrakant Upadhyay C. P. Nagaraj K. Devan A. venkatesan K. Madhusoodanan Homi Bhabha National Institute AnushaktinagarMumbai 400094 India Indira Gandhi Centre for Atomic Research Kalpakkam 603102 India

Geant4 based Monte Carlo study has been carried out to assess the improvement in efficiency of the planar structure of Silicon Carbide(SiC)-based semiconductor fast neutron detector with the stacked structure. A proton recoil detector was simulated, which consists of hydrogenous converter, i.e., high-density polyethylene(HDPE) for generating recoil protons by means of neutron elastic scattering(n, p) reaction and semiconductor material SiC, for generating a detectable electrical signal upon transport of recoil protons through it. SiC is considered in order to overcome the various factors associated with conventional Si-based devices such as operability in a harsh radiation environment, as often encountered in nuclear facilities. Converter layer thickness is optimized by considering 10~9 neutron events of different monoenergetic neutron sources as well as ^(241)Am-Be neutron spectrum. It is found that the optimized thickness for neutron energy range of 1–10 MeV is ~400 μm. However, the efficiency of fast neutron detection is estimated to be only 0.112%,which is considered very low for meaningful and reliable detection of neutrons. To overcome this problem, a stacked juxtaposition of converter layer between SiC layers has been analyzed in order to achieve high efficiency. It is noted that a tenfold efficiency improvement has been obtained—1.04% for 10 layers stacked configuration vis-à-vis 0.112% of single converter layer detector. Further simulation of the stacked detector with respect to variable converter thickness has been performed to achieve the efficiency as high as ~3.85% with up to 50 stacks.

关键词： Geant4 Fast neutron detector Silicon carbide Recoil proton Stacked detector

Immuolocalization of nestin in pancreatic tissue of mice at different ages

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World Journal of Gastroenterology 2008年第46期14卷 7112-7116页

作者： Raj K Dorisetty Sashi G Kiran Malathi R Umrani Sesikeran Boindala Ramesh R Bhonde vijayal.kshmi venkatesan Department of Biochemistry National Institute of Nutrition Tissue Engineering and Banking Laboratory National Center for Cell SciencePune University Campus

AIM： To localize nestin positive cells （NPC） in pancreatic tissue of mice of different ages. METHODS： Paraffin sections of 6-8 um of fixed pancreatic samples were mounted on poly-L-lysine coated slides and used for Immunolocalization using appropriate primary antibodies （Nestin, Insulin, Glucagon）, followed by addition of a fluorescently labeled secondary antibody. The antigen-antibody localization was captured using a confocal microscope （Leica SP 5 series）. RESULTS： In 3-6 d pups, the NPC were localized towards the periphery of the endocrine portion, as evident from immunolocalization of insulin and glucagon, while NPC were absent in the acinar portion. At 2 wk, NPC were localized in both the exocrine and endocrine portions. Interestingly, in 4-wk-old mice NPC were seen only in the endocrine portion, towards the periphery, and were colocalised with the glucagon positive cells. In the pancreas of 8- wk-old mice, the NPC were predominantly localized in the central region of the islet clusters, where immunostaining for insulin was at a maximum. CONCLUSION： We report for the first time the immunolocalization of NPC in the pancreas of mice of different ages （3 d to 8 wk） with reference to insulin and glucagon positive cells. The heterogeneous localization of the NPC observed may be of functional and developmental significance and suggest（s） that mice pancreatic tissue can be a potential source of progenitor cells. NPC from the pancreas can be isolated, proliferated and programmed to differentiate into insulin secreting cells under the appropriate microenvironment.

关键词： Nestin Insulin Glucagon Immunolocalization Mice

Spider-capture-silk mimicking fibers with high-performance fog collection derived from superhydrophilicity and volume-swelling of gelatin knots

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Collagen and Leather 2023年第1期5卷 45-54页

作者： Yuanzhang Jiang Harun venkatesan Shuo Shi Cong Wang Miao Cui Qiang Zhang Lin Tan Jinlian Hu College of Biomass Science and Engineering Key Laboratory of Leather Chemistry and Engineering of Ministry of EducationSichuan UniversityChengdu 610065China Department of Textile and Fibre Engineering Indian Institute of TechnologyDelhiNew Delhi 110016India Department of Biomedical Engineering City University of Hong KongKowloon 999077Hong Kong SARChina Shenzhen Bay Laboratory Shenzhen 518132China Key Laboratory of Biochip Technology Shenzhen Biotech and Health CentreCity University of Hong Kong Shenzhen Research InstituteShenzhen 518057China State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengdu 610065China City University of Hong Kong Shenzhen Research Institute Shenzhen 518057China

Spider-capture-silk(SCS)can directionally capture and transport water from humid air relying on the unique geometrical *** there have been adequate reports on the fabrication of artificial SCSs from petroleum-based materials,it remains a big challenge to innovate bio-based SCS mimicking fibers with high-performance fog collection ability and efficiency ***,we report an eco-friendly and economical fiber system for water collection by coating gelatin on degummed *** to the previously reported fibers with the best fog collection ability(~13.10μL),Gelatin on silk fiber 10(GSF10)can collect larger water droplet(~16.70μL in 330 s)with~98%less ***,the water collection efficiency of GSF10 demonstrates~72%and~48%enhancement to the existing best water collection polymer coated SCS fibers and spidroin eMaSp2 coated degummed silk respectively in terms of volume-to-TCL(vapor-liquid-solid three-phase contact line)*** simultaneous function of superhydro-philicity,surface energy gradient,and~65%water-induced volume swelling of the gelatin knots are the key factors in advancing the water collection *** availability of feedstocks and~75%improved space utiliza-tion guarantee the scalability and practical application of such bio-based fiber.

关键词： Artificial spider-capture-silk Directional water collection Volume-to-TCL index Superhydrophilicity Volume swelling

Design of a kJ-class HiLASE laser as a driver for inertial fusion energy

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High Power Laser Science and Engineering 2014年第2期2卷 1-10页

作者： Antonio Lucianetti Magdalena Sawicka Ondrej Slezak Martin Divoky Jan Pilar venkatesan Jambunathan Stefano Bonora Roman Antipenkov Tomas Mocek HiLASE Project Institute of Physics AS CR Na Slovance 2 18221 Prague Czech Republic CNR-IFN Via Trasea 7 35131 Padova Italy ELI Beamlines Project Institute of Physics AS CR Na Slovance 2 18221 Prague Czech Republic

We present the results of performance modeling of a diode-pumped solid-state HiLASE laser designed for use in inertial fusion energy power plants. The main amplifier concept is based on a He-gas-cooled multi-slab architecture similar to that employed in Mercury laser system. Our modeling quantifies the reduction of thermally induced phase aberrations and average depolarization in Yb3+:YAG slabs by a combination of helium cryogenic cooling and properly designed(doping/width) cladding materials.

关键词： ASE birefringence cryogenic cooling slab lasers thermooptic effects

Genetically modified mouse models for the study of nonalcoholic fatty liver disease

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World Journal of Gastroenterology 2012年第11期18卷 1141-1153页

作者： Perumal Nagarajan M Jerald Mahesh Kuma Ramasamy venkatesan Subeer S Majundar Ramesh C Juyal M Jerald Mahesh Kuma Small Animal Facility National Institute of Immunology NewDelhi 110067 India Animal House Centre for Cellularand Molecular Biology Hyderabad 500007 India Animal House JNU New Delhi110067 India

Nonalcoholic fatty liver disease(NAFLD) is associated with obesity,insulin resistance,and type 2 *** represents a large spectrum of diseases ranging from(1) fatty liver(hepatic steatosis);(2) steatosis with inflammation and necrosis;to(3) *** animal models to study NAFLD/nonalcoholic steatohepatitis(NASH) are extremely useful,as there are still many events to be elucidated in the pathology of *** study of the established animal models has provided many clues in the pathogenesis of steatosis and steatohepatitis,but these remain incompletely *** different mouse models can be classified in two large *** first one includes genetically modified(transgenic or knockout) mice that spontaneously develop liver disease,and the second one includes mice that acquire the disease after dietary or pharmacological *** the molecular mechanism leading to the development of hepatic steatosis in the pathogenesis of NAFLD is complex,genetically modified animal models may be a key for the treatment of *** animal models for NASH should closely resemble the pathological characteristics observed in *** date,no single animal model has encompassed the full spectrum of human disease progression,but they can imitate particular characteristics of human ***,it is important that the researchers choose the appropriate animal *** review discusses various genetically modified animal models developed and used in research on NAFLD.

关键词： Nonalcoholic fatty liver disease Steatosis Steatohepatitis Knockout Animal models

Production and Characterization of Monoclonal Antibodies to Bluetongue Virus

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Virologica Sinica 2011年第1期26卷 8-18页

作者： Veerakyathappa Bhanuprakash Madhusudhan Hosamani Vinayagamurthy Balamurugan Pradeep Narayan Gandhale Gnanavel venkatesan Raj Kumar Singh Division of Virology Indian Veterinary Research Institute Indian Veterinary Research Institute Project Directorate on Animal Disease Monitoring And Surveillance National Research Centre on Equines and Veterinary Type Culture Centre

In the present study,a total of 24 MAbs were produced against bluetongue virus (BTV) by polyethyleneglycol (PEG) mediated fusion method using sensitized lymphocytes and myeloma cells. All these clones were characterized for their reactivity to whole virus and recombinant BTV-VP7 protein,titres,isotypes and their reactivity with 24 BTV-serotype specific sera in cELISA. Out of 24 clones,a majority of them (n = 18) belong to various IgG subclasses and the remaining (n = 6) to the IgM class. A panel of eight clones reactive to both whole BTV and purified rVP7 protein were identified based on their reactivity in iELISA. For competitive ELISA,the clone designated as 4A10 showed better inhibition to hyperimmune serum of BTV serotype 23. However,this clone showed a variable percent of inhibition ranging from16.6% with BTV 12 serotype to 78.9% with BTV16 serotype using 24 serotype specific sera of BTV originating from guinea pig at their lowest dilutions. From the available panel of clones,only 4A10 was found to have a possible diagnostic application.

关键词： Bluetongue virus Competitive ELISA Enzyme-linked immunosorbent assay Monoclonal antibody India.

Synthesis and Controllable Growth Dynamics of Third Order Nonlinear Optical Material of 2-Amino-4-Methylpyridinium 2-Chloro 4-Nitro Benzoate Electro-Mechanical Investigation and Device Fabrication

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Journal of Minerals and Materials Characterization and Engineering 2021年第5期9卷 407-431页

作者： Kuppan venkatesan Lakshmanan Jothi PG and Research Department of Physics Sri Vidya Mandir Arts and Science College Uthangarai India Periyar University Palkalai Nagar Salem India PG and Research Department of Physics Namakkal Kavignar Ramalingam Government Arts College for Women Namakkal India

An organic nonlinear optical material 2-Amino-4-methylpyridinium 2-chloro 4-nitro benzoate (AMPCNB) was synthesized and large size single crystals were grown by slow evaporation solution growth method. Single crystal X-ray diffraction study showed that the title compound belongs to monoclinic crystal system with P21/n space group. A powder XRD study was performed to ascertain its phase. The UV–VIS-NIR study was performed to investigate the transparency window and lower cutoff wavelength of the compound, no absorption has been observed between 318 and 1100 nm. The third harmonic efficiency of the title compound has been studied using the Z-scan technique using continuous-wave Nd:YAG laser to confirm its saturable absorption and self-defocusing effect. The photo conducting and charge transport properties are analyzed using photoconductivity and dielectric measurements. Theoretical calculation of molecular polarizability, which is helpful in device fabrication, was carried out from Penn gap, Clausius-Mosotti equations and the obtained results were compared. Mechanical properties of the grown crystal were investigated by Vicker’s microhardness study.

关键词： Crystal Growth Single Crystal XRD Z-Scan Studies Photoconductivity Dielectric Measurements Mechanical Studies

Hybrid Control Strategy for Matrix Converter Fed Wind Energy Conversion System

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Circuits and Systems 2016年第10期7卷 3038-3053页

作者： Jamna Ayadathil Jamuna venkatesan Department of Electrical and Electronics Engineering Misrimal Navajee Munoth Jain Engineering College (Affiliated to Anna University) Chennai India Department of Electrical and Electronics Engineering Jerusalem College of Engineering (Affiliated to Anna University) Chennai India

In this paper, a hybrid control strategy for a matrix converter fed wind energy conversion system is presented. Since the wind speed may vary, output parameters like power, frequency and voltage may fluctuate. Hence it is necessary to design a system that regulates output parameters, such as voltage and frequency, and thereby provides a constant voltage and frequency output from the wind energy conversion system. Matrix converter is used in the proposed solution as the main power conditioner as a more efficient alternative when compared to traditional back-back converter structure. To control the output voltage, a vector modulation based refined control structure is used. A power tracker is included to maximize the mechanical output power of the turbine. Over current protection and clamp circuit input protection have been introduced to protect the system from over current. It reduces the spikes generated at the output of the converter. The designed system is capable of supplying an output voltage of constant frequency and amplitude within the expected ranges of input during the operation. The matrix converter control using direct modulation method, modified Venturini modulation method and vector modulation method was simulated, the results were compared and it was inferred that vector modulation method was superior to the other two methods. With the proposed technique, voltage transfer ratio and harmonic profile have been improved compared to the other two modulation techniques. The behaviour of the system is corroborated by MATLAB Simulink, and hardware is realized using an FPGA controller. Experimental results are found to be matching with the simulation results.

关键词： Hybrid Control Strategy Wind Energy Conversion System Three Phase Matrix Converter Space Vector Modulation Over Current/Clamp Circuit Protection FPGA Controller