The application of multiple regression model for aero-radiometric data, 1988, Nuclear Geophysics, vol.2, pp.133 - 135 with S.S.Raghuwanshi. [Gist : Multiple linear relation has been used for the recovery of Th-data whenever overflow in channel occurs.]
A direct method for an airborne gamma-ray study of the altitude variation of the uranium stripping factor, 1989, Geophysics, vol.54, No.10, pp.1350 - 1353 with S.S.Raghuwanshi and S.G.Tewari. [Gist : For NaI(Tl) detector used in airborne study, there is Th-gamma energy stripping into lower U-energy channels, a novel statistical way of estimation of the stripping factor has been studied.]
Estimation of stripping ratios at survey height in airborne gamma-ray spectrometry, 1989, Nuclear Geophysics, vol.3, No.2, pp. 113 - 118 with S.S.Raghuwanshi. [Gist : Being inspired by the above study it was attempted for other stripping parameters, taking suitable ground strips.]
Statistical model for the recognition of a buried uranium deposit, 1989, Indian Journal of Pure and Applied Physics, vol.27, pp.128 - 131. [Gist : Soil gas radon data are correlated with the soil radium available. Buried uranium deposit contribution to radon is signaled through the significant intercept of regression model.]
Statistical significance analysis as a tool in radiometric data interpretation, 1989, Exploration and Research for Atomic Minerals, vol.2, pp.219 - 224 with Bhisma Kumar, S.S.Raghuwanshi and S.G.Tewari. [Gist : Significance score z has been used to highlight U, U/Th and U/K anomalies for finding out target from the large pool of airborne radiometric data.]
Rule building expert system for the identification of airborne radiometric anomalies, 1993, Nuclear Geophysics, vol.7, No.4, pp.475 - 495 with S.S.Raghuwanshi. [Gist : Rule building attempt has been made for developing an EXPERT system that will identify favourable targets for uranium exploration.]
Statistical evaluation of an optimum radon emanometric technique, 1990, Nuclear Track & Radiation Measurements, vol.17, pp.503 - 506 with S.L.Soundararajan. [Gist : Proflie of radon concentration in soil gas is correlated with soil radium concentration, optimum technique gives poor correlation as it responds to other sources of radon not contributed by soil radium.]
Factor analysis of geochemical data of Precambrian granitoids of South India ; implication in uranium exploration, 1994, Exploration and Research for Atomic Minerals, vol.7, pp.109 - 124 with S.P.Balakrishnan. [Gist : R-mode factor model is attempted in two groups of samples, one less uranium granitoid, other uranium granitoid. In the latter group U-Pb-Zr factor shows as significant contributor.]
Defining pseduo chi-square for a better objective function required for the normalization of experimental data, 1995, Journal of Applied Statistical Science, vol.2, No.3, pp.283 - 295 [Gist : Pseudo chi-square is defined as sum of squared of observed minus theoretical normal frequency. This is used as objective function when data transformation is done with 'generalized power transformation'. It performs better than already known objective functions.]
Improved estimation of Box-Cox transform parameter and its application to hydro-geochemical data, 1997, Journal of International Association for Mathematical Geology, vol.29, No.8, pp.963 - 976 with Leena Joseph. [Gist : Pseudo chi-square method gives improved estimation of lambda (Box-Cox transform parameter) when used to make uni-mode data follow Gaussian distribution.]
Evaluation of uranium potential of an area using factor analysis of hydro-geochemical data : a case study from Hissar and Bhiwani district of Haryana, India, 1997, Indian Journal of Earth Science, vol.24, Nos.1 - 2, pp.01 - 12 with Rajendra Singh, P.C.Taneja and D.N.Saxena. [Gist : R-mode factor analysis indicates secondary uranium-vanadium mineralization with probable location near Jakhaud village. Data pertain to Lat. range : 28 deg 45 min - 29 deg 15 min and Long. range : 75 deg 30 min - 76 deg 00 min.]
R-mode factor analysis for finding geochemical association of radioactive and trace elements in the QPC of Dhanjori basin, Singhbhum, Jharkhand, 2000, Journal of Gelogical Society of India, vol.56, pp.385 - 393 with J.S.Rao and G.N.Hegde. [Gist : It reflects mixed character of provenance.]
Enrichment characteristics of radio elements in various types of rock from Sambalpur district, Orissa, India, 2004, Proc. Indian Acad. Science (Earth Planet. Sci.), vol.113, No.3, pp.321 - 352 with A.A.P.S.R Acharyulu and B.S.Murthy. [Gist : Th, U and K data has been put in Trilinear diagram to exhibit radio element enrichment characteristics.]
Crustal radioactivity, 2005, Nuclear India, vol.38/No. 11 - 12/May - June 2005, pp.6 - 8. [Gist : Various aspects of radioactivity of earth's crust is described.]
A new high background radiation area in the geothermal region of Eastern Ghats Mobile Belt (EGMB) of Orissa, India, 2006, Radiation Measurements, 41, pp.602 - 610 with V.C.Baranwal, S.P.Sharma, D.Sengupta, M.K.Sandilya, R.Guin and S.K.Saha. [Gist : High background radiation area has been detected and found to be due to the presence of thorium.]
In situ radiation measurements and estimation of U/Th ratio to reflect on the uranium bearing potential zone in metamorphic rocks of Mahendragarh district, Haryana, 2009, Indian Journal of Physics, 83 (6), pp.879 - 885 with O.P.Somani, T.S.Sunil Kumar, B.M.Kukreti and R.A.Gorikhan. [Gist : Portable Gamma Ray Spectrometer (PGRS) has been used to collect data in field conditions which are then analyzed for demarcating uranium bearing zones.]
Mapping the inhomogeneity of the U and Th distributions - using sample size concept in the field conditions, 2009, Indian Journal of Physics, 83 (7), pp.993 - 1000 with Madhulika Pathak, Shaibal Gupta, Debashis Bhattacharya and M.K.Rao. [Gist : U and Th contours have been made with both in situ and sample based lab data. Contours almost match, however, there are some reversal of results which are interesting i.e., U>Th (in field data) shows Th>U (in lab data).]
Development, design and fabrication of high sensitivity borehole logging probe for logging at below 10 ppm eU3O8 level, 2009, Exploration and Research for Atomic Minerals, vol.19, pp.143-148 with N.K.Johri, B.R.Singh, S.S.Raghuwanshi and C.L.Bhairam. [Gist : Normally 3/4"x2" NaI(Tl) detector is used in the probe. Simply using two detectors and recalibrating the probe with a standard high sensitivity is achieved. This probe is also useful for searching orphan radioactive source.]
Integration of geophysical, geochemical and gamma ray logging data of Rohil block of the North Delhi Fold Belt (NDFB) in parts of Rajasthan for developing uranium exploration model, 2011, The Indian Mineralogist, vol.45, No.1, pp.148 - 164 with V.J.Katti, B.S.Bisht, R.K.Fogat and A.Thangaraj [Gist : Regional 'Trend Surface' of geophysical parameters have been found out. Uranium mineralization is seen to be associated with low magnetic residual, low resistivity and high chargeability. The strongly correlated spatial distribution of uranium with haematite has been derived based on a novel ratio and correlation studies. Paper available as Mineral Exploration Model.pdf]
Comparative study of gamma-ray logging and radiometric core assay of boreholes in Block-I of Tummalapalle area, Cuddapah district, Andhra Pradesh using statistical methods, 2012, Explor. & Res. for Atomic Min., vol.22, pp.167 - 172 with M.Sreenivasa Reddy and Gaya Mandal. [Gist : Homogeneity of uranium ore distribution in host rocks and utilization of either 'gamma log' or 'core assay' data in U ore reserve calculation.]