A NUMERICAL METHOD TO COMPUTE THE RESISTIVITY TRANSFORM FROM WENNER SOUNDING DATA*     

RAKESH KUMAR  M. V. RAMANAIAH CHOWDARY 《Geophysical Prospecting》1982,30(6):898-909

A numerical technique to compute the resistivity transform directly from the observed Wenner sounding data has been developed. In principle, the procedure is based on a decomposition method and consists of two steps: the first step determines a function that approximates the apparent resistivity data and the second step transforms this function into the corresponding kernel by an analytical operation. The proposed method is tested on some theoretical master curves. A high degree of precision is achieved with very little computer time. The applicability is shown on two field examples.  相似文献   

AIRS observations of seasonal variability in meridional temperature gradient over Indian region at 100 hPa     

A GUPTA  S K DHAKA  V PANWAR  R BHATNAGAR  V KUMAR  SAVITA M DATTA  S K DASH 《Journal of Earth System Science》2013,122(1):201-213

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Metamorphic evolution of the contact aureole of the Jhirgadandi pluton, Sonbhadra district, Mahakoshal mobile belt, central India     

S P SINGH  ANAND K SRIVASTAVA  GOPENDRA KUMAR  S B DWIVEDI 《Journal of Earth System Science》2013,122(3):743-757

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Lead time for medium range prediction of the dry spell of monsoon using multi-models     

A JAYAKUMAR  VINAY KUMAR  T N KRISHNAMURTI 《Journal of Earth System Science》2013,122(4):991-1004

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Reflection of plane waves in an initially stressed perfectly conducting transversely isotropic solid half-space     

BALJEET SINGH  ANAND KUMAR YADAV 《Journal of Earth System Science》2013,122(4):1045-1053

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Soil gas radon–thoron monitoring in Dharamsala area of north-west Himalayas, India using solid state nuclear track detectors     

GULSHAN KUMAR  ARVIND KUMAR  VIVEK WALIA  JITENDER KUMAR  VIKASH GUPTA  TSANYAO FRANK YANG  SURINDER SINGH  BIKRAMJIT SINGH BAJWA 《Journal of Earth System Science》2013,122(5):1295-1301

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Seasonal prediction of Indian summer monsoon: Sensitivity to persistent SST     

SUKANTA KUMAR DAS  SANJIB KUMAR DEB  C M KISHTAWAL  PRADIP KUMAR PAL 《Journal of Earth System Science》2013,122(5):1183-1193

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Architecture of Colliding Tectonic Plates in Tibet by Passive Source Seismology     

ZHAO Junmeng  YUAN Xiaohui  LIU Hongbing  Prakash KUMAR  PEI Shunping  Rainer KIND  ZHANG Zhongjie  TENG Jiwen  CHENG Honggang  HUANG Ying  XU Qiang  WANG Wei  TANG Wei  ZHANG Heng  LIU Qimin 《《地质学报》英文版》2013,87(Z1):181-181

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Near shore waves,long-shore currents and sediment transport along micro-tidal beaches,central west coast of India     

Sajiv Philip CHEMPALAYIL  V Sanil KUMAR  G Udhaba DORA  Glejin JOHNSON 《国际泥沙研究》2014,29(3):402-413

Coastlines are undergoing constant geomorphologic changes with respect to the incident wave climate.Based on waves measured at 9 m water depth,simulation of near shore wave transformation is done using REFDIF-1numerical model and the near shore breaker parameters are estimated at two micro-tidal beaches along central west coast of India.Model results are validated with measured values.From the breaker parameters,long-shore current and long-shore sediment transport rates（LSTR） are computed by using semi-empirical equations.Estimated long-shore current and LSTR are showing dramatic variations with respect to seasons.Predominant direction of LSTR is observed towards north since the approach waves are from south-west direction during pre-monsoon and post monsoon.During monsoon season,waves are from west south-west and resulted in southerly transport.The estimated annual net and gross LSTR by Cambridge Environmental Research Consultants（CERC） at two locations are in the same order whereas LSTR estimated by Walton ＆ Bruno and Kamphuis equations are showing different estimations because of difference in surf-zone width and foreshore slope between the two locations.For micro-tidal beaches with length less than 6 km,Kamphuis equation is giving agreeable estimation of LSTR.Sensitivity analysis of LSTR estimate shows that coastal inclination is the prominent factor in determining LSTR than incident wave angle.  相似文献   

Benford’s Distribution in Extrasolar World: Do the Exoplanets Follow Benford’s Distribution?     

ABHISHEK SHUKLA  ANKIT KUMAR PANDEY  ANIRBAN PATHAK 《Journal of Astrophysics and Astronomy》2017,38(1):7

In many real life situations, it is observed that the first digits (i.e., 1,2,…,9) of a numerical data-set, which is expressed using decimal system, do not follow a uniform distribution. In fact, the probability of occurrence of these digits decreases in an almost exponential fashion starting from 30.1 % for 1 to 4.6 % for 9. Specifically, smaller numbers are favoured by nature in accordance with a logarithmic distribution law, which is referred to as Benford’s law. The existence and applicability of this empirical law have been extensively studied by physicists, accountants, computer scientists, mathematicians, statisticians, etc., and it has been observed that a large number of data-sets related to diverse problems follow this distribution. However, except two recent works related to astronomy, applicability of Benford’s law has not been tested for extrasolar objects. Motivated by this fact, this paper investigates the existence of Benford’s distribution in the extrasolar world using Kepler data for exoplanets. The quantitative investigations have revealed the presence of Benford’s distribution in various physical properties of these exoplanets. Further, some specific comments have been made on the possible generalizations of the obtained results, its potential applications in analysing the data-set of candidate exoplanets.  相似文献