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Research in Astronomy and Astrophysics 2018年第12期18卷 53-66页

作者： tarun kumar Ankush Pathania Arvind kumar Lal School of Mathematics Thapar Institute of Engineering and Technology

In our previous work, we developed a model to study the effects of rotation and/or tidal distortions on anharmonic radial oscillations and hence on the radial velocity curves of the polytropic models of pulsating variable *** considered the first three modes(fundamental and the next two higher modes) for the polytropic models of index 1.5 and 3.0 in that *** the present paper, we are further extending our previous work to study the effect of the interaction of various modes on anharmonic radial oscillations and hence on radial velocity curves of the rotationally and/or tidally distorted polytropic models of pulsating variable *** this purpose, we have considered the following cases:(i) fundamental mode(ii) fundamental and the first mode,(iii) fundamental and the next two modes and finally(iv) fundamental and the next three higher modes of pulsation in our *** objective of this paper is also to investigate whether the interaction of various modes affects the results of our previous study or *** results of this study show that the interaction of the fundamental mode with higher modes appreciably changes the shape of the radial velocity curve of rotationally distorted and rotationally and tidally distorted polytropic models of pulsating variable stars.

关键词： stars:rotation stars:oscillations stars:binaries technique:radial velocities

Viscosity and Diffusion Effects at the Boundary Surface of Viscous Fluid and Thermoelastic Diffusive Solid Medium

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Advances in Applied Mathematics and Mechanics 2011年第2期3卷 219-238页

作者： Rajneesh kumar tarun Kansal Department of Mathematics Kurukshetra UniversityKurukshetra-136119India

This paper concentrates on the wave motion at the interface of viscous compressible fluid half-space and homogeneous isotropic,generalized thermoelastic diffusive *** wave solutions in both the fluid and thermoelastic diffusive half-spaces have been investigated;and the complex dispersion equation of leaky Rayleigh wave motion have been *** phase velocity and attenuation coefficient of leaky Rayleigh waves have been computed from the complex dispersion equation by using the Muller’s *** amplitudes of displacements,temperature change and concentration have been *** effects of viscosity and diffusion on phase velocity and attenuation coefficient of leaky Rayleigh waves motion for different theories of thermoelastic diffusion have been depicted graphi*** magnitude of heat and mass diffusion flux vectors for different theories of thermoelastic diffusion have also been computed and represented graphically.

关键词： Viscous compressible fluid isotropic thermoelastic diffusion phase velocity attenuation coefficient.

Prediction and optimization of machining forces using oxley’s predictive theory and RSM approach during machining of WHAs

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Defence Technology（防务技术） 2019年第6期15卷 923-935页

作者： Chithajalu Kiran Sagar tarun kumar Amrita Priyadarshini Amit kumar Gupta Mechanical Engineering Department BITS-PilaniHyderabad Campus

Tungsten heavy alloys have come up as one of the best alternatives for high density fragmenting devices and armor piercing *** is mandatory for obtaining the final shapes of such kind of ***,due to high density and elastic stiffness of WHAs,cutting forces will be higher than for most of the metals and alloys;thus,making the machining operation *** machining variable,namely,cutting force components are significantly influenced by the cutting *** paper makes use of Oxley’s predictive analytical model in conjunction with Johnson-Cook constitutive equation to predict forces under different speed and feed combinations during machining of 95 W tungsten heavy *** cutting forces,so predicted by Ml,are considered as input data for the optimization of cutting parameters(cutting speed and feed)using Response Surface Method(RSM).

关键词： Tungsten heavy alloy Machinability Response surface method Oxley’s method

Nanotechnology-Based Advancements in Postharvest Management of Horticultural Crops

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Phyton-International Journal of Experimental Botany 2022年第3期91卷 471-487页

作者： tarun kumar Upadhyay V.S.Varun kumar Amit Baran Sharangi Vijay J.Upadhye Fahad Khan Pratibha Pandey Mohammad Amjad Kamal Abrar Yasin Baba Khalid Rehman Hakeem Department of Biotechnology Parul Institute of Applied Sciences and Centre of Research for DevelopmentParul UniversityVadodara391760India Department of Genetics and Plant Breeding Lovely Professional UniversityPunjabPhagwara144402India Department of Plantation SpicesMedicinal&Aromatic CropsBCKV-Agricultural UniversityMohanpurNadiaWest Bengal741252India Department of Biotechnology Noida Institute of Engineering&TechnologyGreaterNoida201306India West China School of Nursing/Institutes for Systems Genetics Frontiers Science Center for Disease-Related Molecular NetworkWest China HospitalSichuan UniversityChengdu610041China King Fahd Medical Research Center King Abdulaziz UniversityJeddah21589Saudi Arabia Enzymoics Novel Global Community Educational FoundationSydney201101Australia Department of Plant Sciences Mettu University-Bedele College of Agriculture and ForestryBedele CampusBedele318Ethiopia Department of Biological Sciences Faculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia

Horticulture is a branch of Agricultural science where it is defined as the science and art of cultivating and handling fruits,vegetables,ornamental plants and several plants having unique medicinal and aromatic *** crops provide farmers with high income and have good export quality,but they have a concern about postharvest ***,increasing productivity and decreasing post-harvest losses by using scientific studies and techniques like biotechnology and nanotechnology could be the simplest possible solution to the above-mentioned *** nanotechnology which is having the characteristics of nanoparticles is proven to be very useful in science and technological ***-based formulations increase the product quality and the shelf life of horticultural products and provide multiple ways of inhibiting the growth and development of *** is precisely a new edible packaging coverage(film)that controls the exchange of gases and prevents damage from harmful rays such as ultraviolet radiation to a greater *** strength by using nano biosensors for labeling products is considered a fundamental process to automated control of storage *** rotting of vegetables is recognized to be an oxidative reaction and microbial deterioration as *** review will address all such nanotechnology-based advancements for minimizing post-harvest losses of horticultural crops and enhancing the socio-economical progress of growers in particular.

关键词： Nanotechnology horticultural crops post-harvest fruits vegetables

HERMAN RINGS WITH SMALL PERIODS AND OMITTED VALUES

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Acta Mathematica Scientia 2018年第6期38卷 1951-1965页

作者： tarun kumar CHAKRA Gorachand CHAKRABORTY Tarakanta NAYAK School of Basic Sciences Indian Institute of Technology Bhubaneswar Department of Mathematics Goverment General Degree College

All possible arrangements of cycles of three periodic as well as four periodicHerman rings of transcendental meromorphic functions having at least one omitted value aredetermined. It is shown that if p = 3 or 4, then the number of p-cycles of Herman rings isat most one. We have also proved a result about the non-existence of a 3-cycle and a 4-cycleof Herman rings simultaneously. Finally some examples of functions having no Herman ringare discussed.

关键词： omitted values Herman rings and transcendental meromorphic functions

Observations on the Function of Mucous Cells in the Epidermis of the Cat-fish Clarias batrachus Exposed to Sodium Dodecyl Sulfate

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Biomedical and Environmental Sciences 1993年第2期6卷 119-133页

作者： tarun kumar GARG AJAY kumar MITTAL Skin Skin Physiology LaboratoryDepartment of ZoologyBanaras Hindu UniversityVaranasi-221005IndiaPhysiology LaboratoryDepartment of ZoologyBanaras Hindu UniversityVaranasi-221005India

Response of mucous cells, in the epidermis of the catfish Clarias batrachus, to a sublethal concentration of sodium dodecyl sulfate was studied and correlated with the alteration in the status of their secretory activity after different durations of the treatment. At 4h, 8h, 24h,48h and 72h of the detergent treatment, most mucous cells attained voluminous dimensions and appeared closely approximating to or even overlapping the adjacent ones. At 12h, 36h, and 60h, in contrast, the mucous cells appeared small and slender, and seemed to be located at greater intervals. These changes in dimensions were responsible for the apparent increase or decrease in the density of mucous cells after different durations of detergent treatment. Statistically, however, no significant change was observed in the total number of the mucous cells throughout the experiment.The mucous cells appeared enlarged towards the end of the experiment signifying increased mucus production. This is considered as an adaptation, for protection, assisting the fish to adjust to the changed environment.A shift in the histochemical nature of the secretory contents at the middle and basal parts of the mucous cells, from a mixture of neutral and acid glycoproteins to neutral glycoproteins, during the early stages of the treatment suggests that acid moities could not simultaneously be synthesized as an immediate response to enhanced mucous secretion. The apical parts of the mucous cells, however, showed no histochemical change throughout the experiment.

关键词： Observations on the Function of Mucous Cells in the Epidermis of the Cat-fish Clarias batrachus Exposed to Sodium Dodecyl Sulfate

Emission profiling of diesel and gasoline cars at a city traffic junction

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Particuology 2015年第1期13卷 186-193页

作者： Avinash kumar Agarwal tarun Gupta Prakhar Bothra Pravesh Chandra Shukla Engine Research Laboratory Department of Mechanical EngineeringIndian Institute of Technology Kanpur Department of Civil Engineering Indian Institute of Technology Kanpur

In congested urban roads, cars must stop at intersections because of city traffic lights. As a result, pedestri- ans and traffic police personnel are exposed to pollutants emanating from the tailpipe of various vehicles at such city trafficjunctions. In this study, various gasoline- and diesel-fueled cars complying with differ- ent emission standards were tested for their emissions in simulated city traffic junction conditions. The engine exhaust from these cars was subjected to physicochemical characterization at different engine speeds under no-load conditions. These engine conditions were chosen because the cars idle at differ- ent engine speeds at a city traffic junction. Gravimetric and real-time measurements were performed for the tailpipe exhaust sampled from these vehicles. Exhaust particles were collected on 47 mm diameter quartz filter papers and subjected to gravimetric analysis for determining the total particulate mass （TPM） and trace metals while the engines were operated at two different engine idling speeds, 1500 rpm （representing low idling） and 2500 rpm （representing high idling）. At similar engine operating condi- tions, TPM and trace metals were lower for the exhaust from gasoline engines compared to the exhaust from diesel engines. Real-time measurements were performed for particle-bound poly-aromatic hydro- carbons （PAHs）, particle number and size distribution, regulated gaseous emissions and smoke opacity of the exhaust at four different engine speeds, 1500, 2000, 2500, and 3000 rpm. Particle-bound PAHs showed a decreasing trend for the vehicles that complied with stricter vehicular emission standards. Higher particle peak number concentrations were observed for diesel exhausts compared to the results for gasoline exhaust. Regulated gaseous emissions were also comoared.

关键词： Traffic junctions Traffic stop emissions Particle number emission Particle mass emissions Diesel and gasoline fueled cars

An evaluation of the emission profile for two-wheelers at a traffic junction

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Particuology 2015年第1期13卷 112-119页

作者： Avinash kumar Agarwal Prakhar Bothra tarun Gupta Pravesh Chandra Shukla Engine Research Laboratory Department of Mechanical EngineeringIndian Institute of Technology Kanpur Department of Civil Engineering Indian Institute of Technology Kanpur

Two-wheeler vehicles are an important mode of transportation in developing countries. However, the emissions from two-wheeler vehicles are significant. Urban two-wheeler vehicles with gasoline-fueled engines produce NOx and particulate matter emissions that affect urban air quality. During traffic light stops and programmed stops, for instance, pollutants are emitted and are dangerous to human health. In this experimental study, two-wheeler vehicles with different makes, technologies and engine capacities were tested for exhaust emissions including gravimetric and online measurements at different engine speeds and a no load condition at a simulated traffic junction. Gravimetric measurements were performed by collecting the particulate mass （at two engine speeds： 1500 and 2500 rpm） from a diluted engine-out exhaust on quartz filter paper. Next, these collected particulates were used to determine the presence of metals, as well as the benzene soluble organic fraction （BSOF）. The total particulate mass, BSOF and trace elements were slightly higher at a higher engine speed （2500 rpm）. Online measurements were performed by sampling the engine exhaust （at four engine speeds： 1500, 2000, 2500, and 3000rpm） and using online instruments to determine the particle number and size distribution, the particle-bound polyaromatic hydrocarbons （PAHs）, the gaseous emissions and the smoke opacity. Engines with higher cubic capacity emitted a higher concentration of nano-particles. The particle-bound PAH concentration increased as the engine speed increased, but this concentration was notably low for the highest engine speed tested （3000 rpm）. The regulated gaseous emissions increased as the engine speed increased for all vehicles.

关键词： Benzene soluble organic fraction (BSOF) Particle number and size distribution Trace elements Polyaromatic hydrocarbons (PAHs) Regulated gaseous emissions

Management of SARS-CoV-2 infection is a major challenge in patients with lymphoid malignancies: Warrants a clear therapeutic strategy

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World Journal of Virology 2022年第4期11卷 204-207页

作者： tarun Sahu Henu kumar Verma Bhaskar Lvks Physiology All India Institute of Medical ScienceRaipur 492001ChhattisgarhIndia Department of Immunopathology Institute of Lung Health and ImmunityComprehensive Pneumology CenterHelmholtz ZentrumMunich 80331BayrenGermany Zoology Guru Ghasidas VishwavidyalayaBilaspur 495001ChhattisgarhIndia

Patients with lymphoid malignancies are at a higher risk of coronavirus disease 2019(COVID-19)infection due to their immunocompromised state and results in higher mortality rates in these ***-CD 20 therapy is one of the leading causes of immunosuppression that worsens in COVID-19 ***-19 vaccines,on the other hand,appear to be less beneficial to these *** treatment and recommendations are required for these COVID-19 patients with lymphoid malignancies.

关键词： COVID-19 Lymphoid malignancy Lymphoma Vaccination Immunosuppression

The evolution of graphene-based electronic devices

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International Journal of Smart and Nano Materials 2010年第3期1卷 201-223页

作者： Joydeep Basu Jayanta kumar Basu tarun Kanti Bhattacharyya Department of Electronics and Electrical Communication Engineering Department of Chemical Engineering Indian Institute of TechnologyKharagpur 721302India

Successful isolation of single-layer graphene,the two-dimensional allotrope of carbon from graphite,has fuelled a lot of interest in exploring the feasibility of using it for fabrication of various electronic devices,particularly because of its exceptional electronic *** is poised to save Moore’s law by acting as a successor of silicon-based *** article reviews the success story of this allotrope with a focus on the structure,properties and preparation of graphene as well as its various device applications.

关键词： electronic device FET field effect graphene nanoelectronics