Browsing by Author "P.K. Joshi"

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A review on remotely sensed land surface temperature anomaly as an earthquake precursor
(Elsevier B.V., 2017) Anshuman Bhardwaj; Shaktiman Singh; Lydia Sam; P.K. Joshi; Akanksha Bhardwaj; F. Javier Martín-Torres; Rajesh Kumar
The low predictability of earthquakes and the high uncertainty associated with their forecasts make earthquakes one of the worst natural calamities, capable of causing instant loss of life and property. Here, we discuss the studies reporting the observed anomalies in the satellite-derived Land Surface Temperature (LST) before an earthquake. We compile the conclusions of these studies and evaluate the use of remotely sensed LST anomalies as precursors of earthquakes. The arrival times and the amplitudes of the anomalies vary widely, thus making it difficult to consider them as universal markers to issue earthquake warnings. Based on the randomness in the observations of these precursors, we support employing a global-scale monitoring system to detect statistically robust anomalous geophysical signals prior to earthquakes before considering them as definite precursors. © 2017 Elsevier B.V.
Band structure and shape coexistence in 56135Ba79
(American Physical Society, 2010) Suresh Kumar; A.K. Jain; Alpana Goel; S.S. Malik; R. Palit; H.C. Jain; I. Mazumdar; P.K. Joshi; Z. Naik; A. Dhal; T. Trivedi; I. Mehrotra; S. Appannababu; L. Chaturvedi; V. Kumar; R. Kumar; D. Negi; R.P. Singh; S. Muralithar; R.K. Bhowmik; S.C. Pancholi
Excited states of 56135Ba79 at high spins are studied using the reaction Te130(Be9,4n)56135Ba79 at 42.5-MeV beam energy. The earlier known level scheme is extended up to 6.4-MeV excitation energy and (37/2) spin with the addition of several transitions. We have performed polarization asymmetry measurements for some of the strong transitions by using a Clover detector to assign the parity. A comparison of experimental data with the results of tilted axis cranking calculations based on various configurations indicates the coexistence of multiple minima in the triaxial deformation (γ), whereas axial symmetric deformation (ε2) remains constant around 0.09. © 2010 The American Physical Society.
Comprehensive Drought Vulnerability Assessment in Northwestern Odisha: A Fuzzy Logic and Analytical Hierarchy Process Integration Approach
(Multidisciplinary Digital Publishing Institute (MDPI), 2023) Susanta Mahato; Gita Mandal; Barnali Kundu; Sonali Kundu; P.K. Joshi; Pankaj Kumar
Crafting a comprehensive strategy to mitigate the impact of droughts, a complex geo-hazard profoundly affecting socio-economic aspects, entails the creation of a drought vulnerability map as a primary step. This study harmonizes geospatial techniques and the Fuzzy Analytical Hierarchy Process (fuzzy AHP) to formulate such a map for northwestern Odisha, India. From six principal drought-induced vulnerability parameters, namely physical attributes, water demand and usage, agriculture, land use, groundwater and population/development, 22 sub-parameters were selected. Spatial layers were generated for each sub-parameter, followed by their fuzzification using a fuzzy membership approach. Subsequently, AHP was employed to establish parameter weights through pair-wise comparisons. By applying the weighted overlay method, drought vulnerability maps were generated, classifying regions into five vulnerability levels: very high, high, moderate, low, and very low. The outcomes indicate that roughly 33% of the area is classified as having high drought vulnerability. Validation of the approach using statistical metrics, including accuracy, root mean square error and mean absolute error, demonstrates its efficacy in gauging drought vulnerability, thereby aiding planners in devising effective drought mitigation strategies. © 2023 by the authors.
Early summer temperature anomalies and potential impacts on achieving Sustainable Development Goals (SDGs) in National Capital Region (NCR) of India
(Elsevier B.V., 2023) Susanta Mahato; Barnali Kundu; Nikunj Makwana; P.K. Joshi
This research aims to investigate the repercussions of an anomalous early summer Land Surface Temperature (LST) surge on food, energy, and human health within the National Capital Region (NCR) of India, with a specific focus on its potential influence on the Sustainable Development Goals (SDGs). To attain this objective, the study employed various methods to evaluate the magnitude of the deviation in LST. MODIS (Moderate Resolution Imaging Spectroradiometer) images were utilized to compute the monthly diurnal LST range, and the Standard Anomaly (StA) approach was employed to account for data dispersion. Additionally, Innovative Trend Analysis (ITA) and Detrended Fluctuation Analysis (DFA) were conducted to perform regionally specific trend analysis. Furthermore, the Ordinary Least Square (OLS) regression method was applied to investigate the relationship between StA and crop yields. The findings indicate a significant temperature increase in March, with a deviation of 3.5 °C above the average range. Additionally, the study reveals the standard anomaly (StA) of Land Surface Temperature (LST) during March fell within the range of −0.706 to 2.783 °C, while in April, it ranged from −0.781 to 3.263 °C, and in May, it ranged from −3.001 to 0.525 °C. The key significance of the study lies in the impacts of this early summer warming on the attainment of the Sustainable Development Goals. The reduction in crop yields as a result of this warming poses a substantial threat to achieving the SDG-2 target of Zero Hunger. Moreover, the adverse health effects stemming from the early summer warming impede the achievement of the SDG-3.4.1 target. Additionally, the high energy consumption induced by the warming directly affects SDG-6 on affordable and clean energy. The research underscores the critical importance of addressing the impacts of early summer warming to ensure the successful achievement of the Sustainable Development Goals in the National Capital Region of India. Policymakers and stakeholders should take into account the findings of this study to implement targeted strategies that mitigate the adverse effects of early summer warming on food, energy, and human health, and thereby contribute to the realization of the SDGs. © 2023 Elsevier B.V.
Erratum: Loss of collectivity in 79Rb (European Physical Journal A (2006) 28 (277-281) DOI:10.1140/epja/i2005-10286-8)
(2006) R.K. Sinha; A. Dhal; P. Agarwal; S. Kumar; Monika; B.B. Singh; R. Kumar; P. Bringel; A. Neusser; R. Kumar; K.S. Golda; R.P. Singh; S. Muralithar; N. Madhavan; J.J. Das; K.S. Thind; A.K. Sinha; I.M. Govil; R.K. Bhowmik; J.B. Gupta; P.K. Joshi; A.K. Jain; S.C. Pancholi; L. Chaturvedi
[No abstract available]
Evidence of antimagnetic rotation in odd-A Cd105
(American Physical Society, 2010) Deepika Choudhury; A.K. Jain; M. Patial; N. Gupta; P. Arumugam; A. Dhal; R.K. Sinha; L. Chaturvedi; P.K. Joshi; T. Trivedi; R. Palit; S. Kumar; R. Garg; S. Mandal; D. Negi; G. Mohanto; S. Muralithar; R.P. Singh; N. Madhavan; R.K. Bhowmik; S.C. Pancholi
The lifetimes of the levels above spin 23/2⊃- in the negative-parity yrast band of Cd105 have been measured using the Doppler shift attenuation method. The obtained B(E2) values are small and show a decrease with an increase in spin. This establishes, for the first time, antimagnetic rotation (AMR) in an odd-A nucleus. An excellent agreement between the theoretical (semiclassical model) and experimental results along with a large I(2)/B(E2) ratio for the states strongly suggests that the structure of the levels beyond spin 23/2⊃- has the character of a twin-shears type AMR band resulting from the coupling of a pair of g9/2 proton holes with aligned h11/2 and (g7/2)2 neutron particles, along with a small contribution from the core rotation. © 2010 The American Physical Society.
Loss of collectivity in 79Rb
(Springer New York, 2006) R.K. Sinha; A. Dhal; P. Agarwal; S. Kumar; Monika; B.B. Singh; R. Kumar; P. Bringel; A. Neusser; R. Kumar; K.S. Golda; R.P. Singh; S. Muralithar; N. Madhavan; J.J. Das; K.S. Thind; A.K. Sinha; I.M. Govil; R.K. Bhowmik; J.B. Gupta; P.K. Joshi; A.K. Jain; S.C. Pancholi; L. Chaturvedi
High-spin states in 79Rb were populated in the reaction 63Cu(19F, p2n) 79Rb at E(beam) = 60 MeV. The lifetimes of the excited states of the πg9/2 positive-parity yrast band and of the πp3/2 negative-parity band in 79Rb were measured by the Doppler Shift Attenuation Method. The deduced transition quadrupole moments Qt are found to have a decreasing trend with rotational frequency for both the bands, consistent with those found experimentally in neighbouring nuclei.
New vegetation type map of India prepared using satellite remote sensing: Comparison with global vegetation maps and utilities
(Elsevier B.V., 2015) P.S. Roy; M.D. Behera; M.S.R. Murthy; Arijit Roy; Sarnam Singh; S.P.S. Kushwaha; C.S. Jha; S. Sudhakar; P.K. Joshi; Ch. Sudhakar Reddy; Stutee Gupta; Girish Pujar; C.B.S. Dutt; V.K. Srivastava; M.C. Porwal; Poonam Tripathi; J.S. Singh; Vishwas Chitale; A.K. Skidmore; G. Rajshekhar; Deepak Kushwaha; Harish Karnatak; Sameer Saran; A. Giriraj; Hitendra Padalia; Manish Kale; Subrato Nandy; C. Jeganathan; C.P. Singh; C.M. Biradar; Chiranjibi Pattanaik; D.K. Singh; G.M. Devagiri; Gautam Talukdar; Rabindra K. Panigrahy; Harnam Singh; J.R. Sharma; K. Haridasan; Shivam Trivedi; K.P. Singh; L. Kannan; M. Daniel; M.K. Misra; Madhura Niphadkar; Nidhi Nagabhatla; Nupoor Prasad; O.P. Tripathi; P. Rama Chandra Prasad; Pushpa Dash; Qamer Qureshi; S.K. Tripathi; B.R. Ramesh; Balakrishnan Gowda; Sanjay Tomar; Shakil Romshoo; Shilpa Giriraj; Shirish A. Ravan; Soumit Kumar Behera; Subrato Paul; Ashesh Kumar Das; B.K. Ranganath; T.P. Singh; T.R. Sahu; Uma Shankar; A.R.R. Menon; Gaurav Srivastava; Neeti; Subrat Sharma; U.B. Mohapatra; Ashok Peddi; Humayun Rashid; Irfan Salroo; P. Hari Krishna; P.K. Hajra; A.O. Vergheese; Shafique Matin; Swapnil A. Chaudhary; Sonali Ghosh; Udaya Lakshmi; Deepshikha Rawat; Kalpana Ambastha; Akhtar H. Malik; B.S.S. Devi; K.C. Sharma; Prashant Mukharjee; Ajay Sharma; Priya Davidar; R.R. Venkata Raju; S.S. Katewa; Shashi Kant; Vatsavaya S. Raju; B.P. Uniyal; Bijan Debnath; D.K. Rout; Rajesh Thapa; Shijo Joseph; Pradeep Chhetri; Reshma M. Ramachandran
A seamless vegetation type map of India (scale 1: 50,000) prepared using medium-resolution IRS LISS-III images is presented. The map was created using an on-screen visual interpretation technique and has an accuracy of 90%, as assessed using 15,565 ground control points. India has hitherto been using potential vegetation/forest type map prepared by Champion and Seth in 1968. We characterized and mapped further the vegetation type distribution in the country in terms of occurrence and distribution, area occupancy, percentage of protected area (PA) covered by each vegetation type, range of elevation, mean annual temperature and precipitation over the past 100 years. A remote sensing-amenable hierarchical classification scheme that accommodates natural and semi-natural systems was conceptualized, and the natural vegetation was classified into forests, scrub/shrub lands and grasslands on the basis of extent of vegetation cover. We discuss the distribution and potential utility of the vegetation type map in a broad range of ecological, climatic and conservation applications from global, national and local perspectives. Weused 15,565 ground control points to assess the accuracy of products available globally (i.e., GlobCover, Holdridge's life zone map and potential natural vegetation (PNV) maps). Hence we recommend that the map prepared herein be used widely. This vegetation type map is the most comprehensive one developed for India so far. It was prepared using 23.5m seasonal satellite remote sensing data, field samples and information relating to the biogeography, climate and soil. The digital map is now available through a web portal (http://bis.iirs.gov.in). © 2015 Elsevier B.V.
Polarization measurement and Y-ray spectroscopy of Cs122
(American Physical Society, 2005) Rajesh Kumar; A. Kumar; S.K. Chamoli; Kuljeet Singh; M. Sharma; D. Mehta; N. Singh; S.S. Ghugre; N.S. Pattabiraman; L. Chaturvedi; P.K. Joshi; H.C. Jain; Z. Naik; C.R. Praharaj; I.M. Govil
High-spin states in Cs122 have been studied via Ag107(F19, p3n)Cs122 fusion evaporation reaction at beam energy of 93 MeV. Fifteen new transitions belonging to Cs122 have been observed and placed in the level scheme. The level structure of Cs122 has been extended up to Exâ‰7 MeV and Jâ‰28â. We have performed the linear polarization measurements using the Clover detectors to assign the unknown spins and parities of a few bands. We have also observed a few linking transitions between negative and positive parity bands indicating the octupole collectivity in this nucleus. The structure of the various bands are discussed in the frame work of the cranked Hartree-Fock-Bogoliubov model and the microscopic projected Hartree-Fock model calculations. © 2005 The American Physical Society.
Shape changes at high spin in 78Kr
(2006) A. Dhal; R.K. Sinha; P. Agarwal; S. Kumar; Monika; B.B. Singh; R. Kumar; P. Bringel; A. Neusser; R. Kumar; K.S. Golda; R.P. Singh; S. Muralithar; N. Madhavan; J.J. Das; A. Shukla; P.K. Raina; K.S. Thind; A.K. Sinha; I.M. Govil; P.K. Joshi; R.K. Bhowmik; A.K. Jain; S.C. Pancholi; L. Chaturvedi
High-spin states in 78Kr have been studied via the 63Cu (19F, 2p2n)78Kr reaction at a beam energy of 60 MeV using the Indian National Gamma Array (INGA). In this nucleus, lifetimes have been measured upto the I π=22+ level in the yrast positive-parity band and upto the I π=15- level in the negative-parity band using the Doppler Shift Attenuation Method (DSAM). The deduced transition quadrupole moments Qt's are found to decrease with rotational frequency for both the bands.