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Manifestation of earthquake preparation zone in the ionosphere before 2021 Sonitpur,Assam earthquake revealed by GPS-TEC data

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Geodesy and Geodynamics 2022年第3期13卷 230-237页

作者： Gopal sharma North Eastern Space Applications Centre Umiam793103MeghalayaIndia

Global Positioning System(GPS)Continuously Operating Reference Station(CORS)data analysis shows that the ionosphere’s electron density variability is linked to the deformation and stress accumulation in the Earth’s *** in ionosphere total electron content(TEC)variability before 2021 M6.4 Sonitpur,Assam earthquake were detected using L1 and L2 GPS frequencies that showed three distinct abnormalities on April 3,9,10,***’s correlation coefficient(r)of TEC decreases in the CORS that lies away from the earthquake epicenter,indicating the possibilities of a positive relationship between TEC variability and earthquake *** concentration also decreases towards the epicenter within the earthquake preparation zone(EPZ).It is also observed that the Pearson’s correlation coefficient(r)of TEC decreases linearly near the *** study demonstrates the possibilities of determining the TEC anomalous zone in the ionosphere that coincides with the EPZ in the crustal *** research indicated the possibilities of magnitude estimation of an impending earthquake based on the TEC anomalous zone in the ionosphere using closely spaced dense CORS network data.

关键词： GPS TEC Sonitpur earthquake Ionosphere perturbation TEC anomaly Magnitude estimation

碳基材料的Z型和S型异质结光催化清洁能源综述

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新型炭材料（中英文） 2024年第3期39卷 458-482页

作者： Sahil Rana amit Kumar WANG Tong-tong Gaurav sharma Pooja Dhiman Alberto García-Penas International Research Centre of Nanotechnology for Himalayan Sustainability(IRCNHS) Shoolini UniversitySolan173229India 西安建筑科技大学交叉创新研究院西安710055 Departamento de Ciencia e Ingeniería de Materiales e Ingeniería Química(IAAB) Universidad Carlos Ⅲ de MadridLegan'es28911Spain

碳纳米管/纳米纤维、石墨烯、氧化石墨烯、还原氧化石墨烯、石墨炔、碳量子点和富勒烯等炭材料因具有高导电性、优异的稳定性和生物相容性等独特性能,近年来受到广泛关注。在炭材料中构建Z型和S型异质结已成为在能量转换应用中提高光催... 详细信息

碳纳米管/纳米纤维、石墨烯、氧化石墨烯、还原氧化石墨烯、石墨炔、碳量子点和富勒烯等炭材料因具有高导电性、优异的稳定性和生物相容性等独特性能,近年来受到广泛关注。在炭材料中构建Z型和S型异质结已成为在能量转换应用中提高光催化效率的一种有效策略。本文综述了光催化制氢和CO_(2)还原等清洁能源的基本原理,阐述了它们各自的机理和优势。此外,还讨论了不同类型的炭材料以及其中Z型和S型异质结的合成和构建,强调了它们在促进电荷分离、减少光生载流子复合损失和扩大光谱响应范围方面的作用。以太阳能燃料生产为重点,讨论和总结了碳基Z型和S型异质结在光催化制氢和还原CO_(2)方面的最新进展。最后,讨论了目前碳基光催化剂领域的瓶颈和挑战,并对该领域的未来发展提出了有价值的见解。

关键词：炭材料异质结 Z型 S型光催化氢能材料

Variational Monte Carlo Study of _(ΛΛ)^(4)H

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Chinese Physics Letters 2013年第3期30卷 40-43页

作者： Bhupali sharma Department of Physics Jamia Millia IslamiaNew Delhi-110025India Arya Vidyapeeth College Gauhati UniversityAssamIndia

Variational Monte Carlo calculations are carried out for _(ΛΛ)^(4)H to explore the possibility of its existence,using realistic NN,NNN,and phenomenologicalΛN andΛNN *** also perform calculations using FGNNand NSC97ΛN potentials,and demonstrate the effect of the exchange part of the two-bodyΛN interaction and three-bodyΛNN interaction on the binding energy ofΛΛ*** the stability of _(ΛΛ)^(4)H remains an open question and this hypernuclear system has to be explored more theoretically.

关键词： interaction calculations stability

Assessment of land use change and its effect on soil carbon stock using multitemporal satellite data in semiarid region of Rajasthan, India

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Ecological Processes 2019年第1期8卷 513-529页

作者： Garima sharma L.K.sharma K.C.sharma Department of Environmental Science Central University of RajasthanNH-8BandarsindriRajasthan 305817India M.D.S.University AjmerRajasthanIndia.

Background:Land use change plays a vital role in global carbon *** land use change impact on soil carbon stock is crucial for implementing land use management to increase carbon stock and reducing carbon ***,the objective of our study was to determine land use change and to assess its effect on soil carbon stock in semi-arid part of Rajasthan,*** temporal satellite data of Pushkar valley region of Rajasthan acquired on 1993,2003,and 2014 were analyzed to assess land use *** trading of land use was depicted *** organic carbon(SOC)stock was calculated for soil to a depth of 30 cm in each land use type in 2014 using field data *** SOC stock for previous years was estimated using stock change *** effect of land use change on SOC stock was determined by calculating change in SOC stock(t/ha)by deducting the base-year SOC stock from the final year stock of a particular land use ***:The total area under agricultural lands was increased by 32.14%while that under forest was decreased by 23.14%during the time period of 1993–*** land use change shows that in both the periods(1993–2003 and 2003–2014),7%of forest area was converted to agricultural land and about 15%changes occurred among agricultural *** 1993–2003,changes among agricultural land led to maximum loss of soil carbon,i.e.,4.88 Mt C and during 2003–2014,conversion of forest to agricultural land led to loss in 3.16 Mt ***:There was a continuous decrease in forest area and increase in cultivated area in each time *** use change led to alteration in carbon equity in soil due to change or loss in ***,we can conclude that the internal trading of land use area during the 10-year period(1993–2003)led to net loss of SOC stock by 8.29 Mt ***,land use change during 11-year period(2003–2014)caused net loss of SOC by 2.76 Mt *** should be made to implement proper land

关键词： Multitemporal satellite data Land use change dynamics Internal trading of land use SOC stock,Stock change factor Change in SOC pool Land use management

Numerical simulation of square shaped particle sedimentation

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Particuology 2024年第1期84卷 107-116页

作者： Govind sharma Bahni Ray Department of Mechanical Engineering Indian Institute of Technology DelhiHauz KhasNew Delhi110016India

Direct numerical simulations of square particle sedimentation in a viscous incompressible fluid are presented to examine the effects of sharp edges for various particle-to-fluid density ratios and different initial inclination *** settling process exhibits four different motion regimes;non-oscillatory,non-uniform centered oscillatory,uniform off-centered oscillatory,and non-uniform off-centered(irregular)*** moderate density ratios,we observe that the rotational motion of settling square particle varies with the initial inclination *** employ Dynamic Time Warping and Fast Fourier Transform to analyze translational and angular *** systems are described using phase-space plots,and a chaotic phenomenon is observed at a higher density ratio.

关键词： Sedimentation Distributed Lagrangian multiplier Phase synchronization Oscillations

Instability of binary nanofluids with magnetic field

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Applied Mathematics and Mechanics(English Edition) 2015年第6期36卷 693-706页

作者： U.GUPTA J.sharma V.sharma Dr.S.S.Bhatnagar University Institute of Chemical Engineering and Technology Panjab University Energy Research Centre Panjab University Department of Mathematics Himachal Pradesh University

The present paper investigates the effects of a vertical magnetic field on the double diffusive nanofluid convection, The effects of the Brownian motion and ther- mophoresis due to the presence of nanoparticles and the effects of the Dufour and Sorer parameters due to the presence of solute are included in the investigated model. The normal mode technique is used to solve the conservation equations. For the analytical study, valid approximations are made in the complex expression for the Rayleigh number to get useful and interesting results. The bottom heavy binary nanofluids are more stable than the regular binary fluids, while the top heavy binary nanofluids are less stable than the regular binary fluids. The critical wave number and the critical Rayleigh number in- crease whereas the frequency of oscillation （for the bottom heavy configuration） decreases when the Chandrasekhar number increases. The numerical results for the alumina-water nanofiuid are studied by use of the MATHEMATICA software.

关键词： natural convection binary nanofluid Brownian motion thermophoresis,Chandrasekhar number

Screening of the whole human cytochrome P450 complement(CYPome)with enzyme bag cocktails

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Journal of Pharmaceutical Analysis 2020年第3期10卷 271-276页

作者： Sangeeta Shrestha sharma Shishir sharma Matthias Bureik School of Pharmaceutical Science and Technology Health Sciences PlatformTianjin UniversityTianjin300072China

We have previously introduced the use of permeabilized fission yeast cells(enzyme bags)that recombinantly express full-length CYPs for drug metabolism *** enzyme bags are cells with pores that function as enzymes in *** can easily be prepared without a need for ultracentrifugation and may be used in similar protocols as *** this study we report the preparation of enzyme bag cocktails that permit the testing of multiple CYPs in a single enzyme bag ***,we established a convenient testing scheme that permits a rapid screen of all human CYPs for activity towards any given candidate *** important aspect of this approach is the reduction of individual CYP test *** a cocktail containing many CYPs tests negative,it follows that all CYPs included in that cocktail need not be tested individually,thus saving time and *** new protocol was validated using two probe substrates.

关键词： Cytochrome P450 Drug metabolism Fission yeast Luminescence Proluciferin

Remote sensing and census based assessment and scope for improvement of rice and wheat water productivity in the Indo-Gangetic Basin

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Science China(Technological Sciences) 2009年第11期52卷 3300-3308页

作者： sharma Bharat International Water Management Institute (IWMI) New Delhi Office NASC Complex CG Block Dev Prakash Shastri Marg Pusa New Delhi 110012 India

Understanding of crop water productivity (WP) over large scale, e.g., river basin, has significant impli-cations for sustainable basin development planning. This paper presents a simplified approach to combine remote sensing, census and weather data to analyze basin rice and wheat WP in Indo-Gangetic River Basin, South Asia. A crop dominance map is synthesized from ground truth data and three existing LULC maps. National statistics on crop area and production information are collected and the yield is interpolated to pixel level using moderate resolution imaging spectroradiometer (MODIS) normalized difference vegetation index (NDVI). Crop evapotranspiration is mapped using simplified surface energy balance (SSEB) model with MODIS land surface temperature products and meteorological data collected from 56 weather stations. The average ET by rice and wheat is 368 mm and 210 mm respectively, accounting for only 69% and 65% of potential ET, and 67% and 338% of rainfall of the crop growth period measured from Tropical Rainfall Measurement Mission (TRMM). Average WP for rice and wheat is 0.84 and 1.36 kg/m3 respectively. WP variability generally follows the same trend as shown by crop yield disregarding climate and topography changes. Sum of rice-wheat water productivity, however, exhibits different variability leading to better understanding of irrigation water management as wheat heavily relies on irrigation. Causes for variations and scope for improvement are also analyzed.

关键词： crop water productivity remote sensing census Indo-Gangetic Basin

An overview of deep eutectic solvents:Alternative for organic electrolytes,aqueous systems&ionic liquids for electrochemical energy storage

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Journal of Energy Chemistry 2023年第7期82卷 592-626,I0013页

作者： Akshay sharma Renuka sharma Ramesh C.Thakur Lakhveer Singh Department of Chemistry Himachal Pradesh UniversitySummer HillShimla171005Himachal PradeshIndia Department of Chemistry Sardar Patel UniversityMandi175001Himachal PradeshIndia

As the demand for sustainable energy sources continues to rise,the need for efficient and reliable energy storage systems becomes *** order to effectively store and distribute renewable energy,new and innovative solutions must be *** review examines the deep eutectic solvents(DESs)as a green,safe,and affordable solution for the electrochemical energy storage and conversion field,offering tremendous opportunities and a promising *** are a class of environment-friendly solvents known for their low toxicity and unique properties,such as their good conductivity,high thermal stability,and *** review explores the fundamentals,preparations,and various interactions that often predominate in the formation of DESs,the properties of DESs,and how DESs are better than traditional solvents involving cost-ineffective and unsafe organic electrolytes and ionic liquids as well as inefficient aqueous systems due to low energy density for electrochemical energy storage ***,a particular focus is placed on the various electrochemical applications of DESs,including their role in the electrolytes in batteries/supercapacitors,electropolishing and electrodeposition of metals,synthesis of electrode materials,recycling of electrodes,and their potential for use in CO_(2)*** review concludes by exploring the challenges,research gaps,and future potential of DESs in electrochemical applications,providing a comprehensive overview,and highlighting key considerations for their design and use.

关键词： Deep eutectic solvent Green solventHole theory Energy storage devices Aqueous electrolyte