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Development and performance characterization of a compact plasma focus based portable fast neutron generator

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Plasma Science and Technology 2020年第11期22卷 127-135页

作者： Rishi verma Ekansh MISHRA Prosenjit DHANG Basanta kumar DAS Manraj MEENA Lakshman RONGALI Archana SHARMA Pulsed Power&Electromagnetics Division Bhabha Atomic Research Centre FacilityAtchutapuramVishakhapatnam 531011.India Homi Bhabha National Institute AnushaktinagarMumbai 400094India Raja Ramanna Centre for Advanced Technology Rajendra NagarIndore 452013India Variable Energy Cyclotron Centre BidhannagarKolkata 700064India

The design details and performance characterization results of a newly developed plasma focus based compact and portable system(0.5 m×0.5 m×1.2 m,weighing≈100 kg)that produces an average neutron yield of^2×10^8 neutrons/shot(of fast D-D neutrons with typical energy^2.45 Me V)at^1.8 k J energy discharge are *** the detailed analysis of the experimental characterization and simulation results of this system,it has been conclusively revealed that specifically in plasma focus devices with larger static inductance:(i)pinch current is a reliable and more valid neutron yield scaling parameter than peak current,(ii)the ratio of pinch/peak current improves as static inductance of the system reduces,(iii)the benign role of the higher static/pinch inductance ratio enables the supply of inductively stored energy in densely pinched plasma with a larger time constant and it is well depicted by the extended dip observed in the discharge current trace,(iv)there is the need to redefine existing index values of the pinch(Ipinch^4.7)and peak(Ipeak^3.9)currents in neutron yield scaling equations to higher values.

关键词： plasma focus neutrons time of flight pinch current peak current plasma pinch pseudospark switch

Evaluating effect of chloride attack and concrete cover on the probability of corrosion

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Frontiers of Structural and Civil Engineering 2013年第4期7卷 379-390页

作者： Sanjeev kumar verma Sudhir Singh BHADAURIA Saleem AKHTAR Civil Engineering Department University Institute of TechnologyRajiv Gandhi Technological UniversityBHOPAL Madhya Pradesh 462036India S.G.S.Institute of Technology and Science INDORE Madhya Pradesh 452003India

Corrosion of reinforced concrete(RC)structures is one of the significant causes of deterioration of reinforced concrete(RC)*** is a major process governing the initiation and advancement of the injurious corrosion of steel ***,several researches on the chlorination of concrete structures have been ongoing around the *** article reviews several recently performed chlorination studies,and from results of a field survey evaluates the effect of chloride content on the probability of corrosion and the influence of concrete compressive strength on the chloride content and penetration,also evaluates the effect of concrete cover over the chloride content of the RC structures at rebar depth and on the probability of corrosion.

关键词： concrete chloride reinforcement corrosion deterioration cover

Herbal remedies,vaccines and drugs for dengue fever:Emerging prevention and treatment strategies

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Asian Pacific Journal of Tropical Medicine 2019年第4期12卷 147-152页

作者： Rinku Rozera Surajpal verma Ravi kumar Anzarul Haque Anshul Attri School of Pharmaceutical Sciences Lovely Professional University College of Pharmacy Prince Sattam Bin Abdul Aziz University

Dengue fever is a disease that is caused by five dengue virus(DENV) serotypes. It is endemic in more than 128 countries. Millions of people are affected by this disease. But still, there is no specific treatment available till now to combat it. Some of the preventive measures using plant extracts showed certain promising ovicidal activity against Aedes aegypti. There are some vaccines as preventive measure and antiviral agents to cure the dengue fever, which are under clinical trials but their results have not been reported or approved yet. Dengvaxia is the only licensed vaccine to prevent dengue fever in some South American countries, but it is not approved by other regulatory authorities worldwide. Scientific research has been going on to find a permanent cure for dengue fever, but till now, no successful invention has been done. There are some general treatments for dengue patient by employing analgesics and fluid replacement; however, specific treatment is needed to overcome the lethal effect of dengue fever. Since this disease has affected millions of people and not much invention has been made in this field; therefore, advancement in dengue therapy is required for the safety and well-being of dengue patients. Herein we collectively describe the different chemotherapeutics agents, alternative methods like vaccines and antiviral agents to prevent and cure this lethal disease. Furthermore, the future perspective for the treatment of dengue is discussed in this review.

关键词： Dengue fever Plant extracts Vaccines and Antiviral agents

Fuzzy Based Ant Colony Optimization Scheduling in Cloud Computing

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Computer Systems Science & Engineering 2022年第2期40卷 581-592页

作者： K.Rajakumari M.Vinoth kumar Garima verma S.Balu Dilip kumar Sharma Sudhakar Sengan Department of Computer Science and Engineering School of EngineeringAvinashlingam Institute for Home Science and Higher Education for WomenCoimbatore641043Tamil NaduIndia Department of Information Science and Engineering Dayananda Sagar Academy of Technology and ManagementBangalore560082India School of Computing DIT UniversityDehradun248009UttarakhandIndia Department of Computer Science and Engineering Paavai Engineering CollegePachal637018Tamil NaduIndia Department of Mathematics Jaypee University of Engineering and TechnologyGuna473226M.P.India Department of Computer Science and Engineering PSN College of Engineering and TechnologyTirunelveli627152Tamil NaduIndia

Cloud computing is an Information Technology deployment model established on *** scheduling states the set of rules for task allocations to an exact virtual machine in the cloud computing ***,task scheduling challenges such as optimal task scheduling performance solutions,are addressed in cloud ***,the cloud computing performance due to task scheduling is improved by proposing a Dynamic Weighted Round-Robin *** recommended DWRR algorithm improves the task scheduling performance by considering resource competencies,task priorities,and ***,a heuristic algorithm called Hybrid Particle Swarm Parallel Ant Colony Optimization is proposed to solve the task execution delay problem in DWRR based task *** the end,a fuzzy logic system is designed for HPSPACO that expands task scheduling in the cloud environment.A fuzzy method is proposed for the inertia weight update of the PSO and pheromone trails update of the ***,the proposed Fuzzy Hybrid Particle Swarm Parallel Ant Colony Optimization on cloud computing achieves improved task scheduling by minimizing the execution and waiting time,system throughput,and maximizing resource utilization.

关键词： Cloud Computing scheduling ant colony optimization fuzzy logic

Thermal decomposition and kinetics of plastic bonded explosives based on mixture of HMX and TATB with polymer matrices

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Defence Technology（防务技术） 2017年第1期13卷 22-32页

作者： Arjun Singh Tirupati C.Sharma Mahesh kumar Jaspreet Kaur Narang Prateek Kishore alok Srivastava Terminal Ballistics Research Laboratory Defence Research&Development OrganisationMinistry of DefenceExplosive DivisionSector 30Chandigarh(UT)160030India Department of Chemistry&Centre for Advanced Studies in Chemistry Panjab UniversityChandigarh160 014India

This work describes thermal decomposition behaviour of plastic bonded explosives(PBXs) based on mixture of 1,3,5,7-tetranitro-1,3,5,7-tetrazocane(HMX) and 2,4,6-triamino-1,3,5-trinitrobenzene(TATB)with Viton A as polymer binder. Thermal decomposition of PBXs was undertaken by applying simultaneous thermal analysis(STA) and differential scanning calorimetry(DSC) to investigate influence of the HMX amount on thermal behavior and its kinetics. Thermogravimetric analysis(TGA) indicated that the thermal decomposition of PBXs based on mixture of HMX and TATB was occurred in a three-steps. The first step was mainly due to decomposition of HMX. The second step was ascribed due to decomposition of TATB, while the third step was occurred due to decomposition of the polymer matrices. The thermal decomposition % was increased with increasing HMX amount. The kinetics related to thermal decomposition were investigated under non-isothermal for a single heating rate measurement. The variation in the activation energy of PBXs based on mixture of HMX and TATB was observed with varying the HMX amount. The kinetics from the results of TGA data at various heating rates under non-isothermal conditions were also calculated by Flynn—Wall—Ozawa(FWO) and Kissinger-Akahira-Sunose(KAS)methods. The activation energies calculated by employing FWO method were very close to those obtained by KAS method. The mean activation energy calculated by FWO and KAS methods was also a good agreement with the activation energy obtained from single heating rate measurement in the first step decomposition.

关键词： Plastic bonded explosives Thermogravimetric analysis Differential scanning calorimeter Thermal decomposition Kinetics

Feasibility of one-shot dilation access in the pediatric age group

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World Journal of Pediatric Surgery 2022年第1期5卷 7-11页

作者： alok Srivastava Krishna kumar Yadav Anjana Singh Anoop kumar Srivastava Sanjeet kumar Singh Urology Dr Ram Manohar Lohia Institute of Medical SciencesLucknowIndia Pediatrics Dr Ram Manohar Lohia Institute of Medical SciencesLucknowUttar PradeshIndia Department of Pathology Mayo Institute of Medical SciencesBarabankiUttar PradeshIndia Radiotherapy Dr Ram Manohar Lohia Institute of Medical SciencesLucknowIndia

Objective To compare sequential fascial dilation(SFD)versus one-shot dilation(OSD)in the pediatric patients undergoing percutaneous *** The present study is an observational *** study subjects were divided into two *** group 1,renal dilation was done using the SFD and in group 2,renal dilation was done using the *** amount of time exposed to radiation during access to pelvicalyceal system was ***,stone free rates,ancillary procedures for residual stones and hospital stay were *** Clavien-Dindo classification was used for grading the *** Radiation exposure and operative time were less in OSD group(95%confidence interval(CI)3.068 to 14.072,and 2.565 to 12.435,p<0.005).The mean drop of hematocrit was statistically less significant in OSD group(p=0.032).In both groups,complications,stone free rate and hospital stay were statistically *** OSD is feasible in the children with reduced radiation exposure and shorter operative *** outcome was similar to SFD.

关键词： OSD shorter pediatric

Petrology and Sr-Nd isotope systematics of the Ahobil kimberlite(Pipe-16)from the Wajrakarur field, Eastern Dharwar craton, southern India

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Geoscience Frontiers 2019年第3期10卷 1167-1186页

作者： Abhinay Sharma alok kumar Praveer Pankaj Dinesh Pandit Ramananda Chakrabarti N.V.Chalapathi Rao EPMA and SEM Laboratories Department of Geology Banaras Hindu University Centre for Earth Sciences Indian Institute of Science

Detailed mineralogical, bulk-rock geochemical and Sr-Nd isotopic data for the recently discovered Ahobil kimberlite(Pipe-16) from the Wajrakarur kimberlite field(WKF), Eastern Dharwar craton(EDC),southern India, are presented. Two generations of compositionally distinct olivine, Ti-poor phlogopite showing orangeitic evolutionary trends, spinel displaying magmatic trend-1, abundant perovskite, Tirich hydrogarnet, calcite and serpentine are the various mineral constituents. On the basis of(i) liquidus mineral composition,(ii) bulk-rock chemistry, and(iii) Sr-Nd isotopic composition, we show that Ahobil kimberlite shares several characteristic features of archetypal kimberlites than orangeites and lamproites. Geochemical modelling indicate Ahobil kimberlite magma derivation from small-degree melting of a carbonated peridotite source having higher Gd/Yb and lower La/Sm in contrast to those of orangeites from the Eastern Dharwar and Bastar cratons of Indian shield. The T_(Dm) Nd model age(～2.0 Ga) of the Ahobil kimberlite is(i) significantly older than those(1.5～1.3 Ga) reported for Wajrakarur and Narayanpet kimberlites of EDC,(ii) indistinguishable from those of the Mesoproterozoic EDC lamproites,and(iii) strikingly coincides with the timing of the amalgamation of the Columbia supercontinent. High bulk-rock Fe-Ti contents and wide variation in oxygen fugacity fO_2, as inferred from perovskite oxybarometry, suggest non-prospective nature of the Ahobil kimberlite for diamond.

关键词： Petrology Isotopes Kimberlite Wajrakarur Dharwar craton India

Lipid-nanoparticle-enabled nucleic acid therapeutics for liver disorders

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Acta Pharmaceutica Sinica B 2024年第7期14卷 2885-2900页

作者： Porkizhi Arjunan Durga Kathirvelu Gokulnath Mahalingam Ashish kumar Goel Uday George Zacharaiah alok Srivastava Srujan Marepally Center for Stem Cell Research(A Unit of inStem Bengaluru)Christian Medical College CampusBagayamVellore 632002Tamil NaduIndia Manipal academy for higher education Mangalore 576104KarnatakaIndia Department of Hematology Christian Medical College&HospitalVellore 632004Tamil NaduIndia Department of Hepatology Christian Medical College&HospitalVellore 632004Tamil NaduIndia

Inherited genetic disorders of the liver pose a significant public health *** transplantation is often limited by the availability of donor livers and the exorbitant costs of immunosuppressive *** overcome these limitations,nucleic acid therapy provides a hopeful alternative that enables gene repair,gene supplementation,and gene silencing with suitable *** viral vectors are the most efficient and preferred for gene therapy,pre-existing immunity debilitating immune responses limit their *** a potential alternative,lipid nanoparticle-mediated vectors are being explored to deliver multiple nucleic acid forms,including pDNA,mRNA,siRNA,and ***,we discuss the broader applications of lipid nanoparticles,from protein replacement therapy to restoring the disease mechanism through nucleic acid delivery and gene editing,as well as multiple preclinical and clinical studies as a potential alternative to liver transplantation.

关键词： Lipid nanoparticle Liver disorders Gene therapy Gene editing Nucleic acid delivery pDNA mRNA siRNA ASO Clinical trials

Evaluating the Impact of Software Security Tactics: A Design Perspective

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Computers, Materials & Continua 2021年第3期66卷 2283-2299页

作者： Mamdouh Alenezi Abhishek kumar Pandey Richa verma Mohd Faizan Shalini Chandra Alka Agrawal Rajeev kumar Raees Ahmad Khan College of Computer and Information Sciences Prince Sultan UniversitySaudi Arabia Department of Information Technology Babasaheb Bhimrao Ambedkar UniversityLucknowUttar PradeshIndia Department of Computer Science Babasaheb Bhimrao Ambedkar UniversityLucknowUttar PradeshIndia Department of Computer Application Shri Ramswaroop Memorial UniversityLucknowUttar PradeshIndia

Design architecture is the edifice that strengthens the functionalities as well as the security of web *** order to facilitate architectural security from the web application’s design phase itself,practitioners are now adopting the novel mechanism of security *** the intent to conduct a research from the perspective of security tactics,the present study employs a hybrid multi-criteria decision-making approach named fuzzy analytic hierarchy process-technique for order preference by similarity ideal solution(AHP-TOPSIS)method for selecting and assessing multi-criteria *** adopted methodology is a blend of fuzzy analytic hierarchy process(fuzzy AHP)and fuzzy technique for order preference by similarity ideal solution(fuzzy TOPSIS).To establish the efficacy of this methodology,the results are obtained after the evaluation have been tested on fifteen different web application projects(Online Quiz competition,Entrance Test,and others)of the Babasaheb Bhimrao Ambedkar University,Lucknow,*** tabulated outcomes demonstrate that the methodology of the Multi-Level Fuzzy Hybrid system is highly effective in providing accurate estimation for strengthening the security of web *** proposed study will help experts and developers in developing and managing security from any web application design phase for better accuracy and higher security.

关键词： Web application software security security tactics fuzzy AHP fuzzy TOPSIS