Browsing by Author "Garima Shukla"

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Comparison of spatial prediction methods for Zn and Fe
(Institute of Electrical and Electronics Engineers Inc., 2016) Garima Shukla; S.K. Singh; G.C. Mishra
Zn and Fe are the most important and essential micronutrients for maintaining soil, plant and human health. Chances of deficiency of these micronutrients have been found more in future in the soil of Araziline Block of Varanasi district of Uttar Pradesh (India). Keeping this in the mind spatial predictions have been done for Zn and Fe content. For spatial prediction of these micronutrients content in the soil two spatial prediction (interpolation) methods viz. Kriging and IDW methods were used in the present study. Spatial distribution maps were generated to recognize the complex spatial variability of the Zn and Fe contents with different colors and patterns. Each color in these maps corresponds to a particular amount of Zn and Fe content. It has been found that maps and results obtained by spatial prediction methods which are the combination of the geostatistics and GIS provides a powerful tool to describe the spatial distribution of Zn and Fe content in the soil. This results obtained by the present study will be helpful in fertilizer application management to maintain desired level of Zn and Fe in the soil. A proper attention is also required to maintain the level of Zn and Fe in future prospects. © 2016 IEEE.
Cyclophosphamide therapy as an adjunct in refractory post-tubercular arachnoiditis
(Tuberculosis Association of India, 2022) Vinay Goyal; Arunmozhimaran Elavarasi; Anand Kumar; Priyanka Samal; Ajay Garg; Garima Shukla; V.Y. Vishnu; Mamta Bhushan Singh; M.V. Padma Srivastava
Introduction: There is no satisfactory treatment for post tubercular arachnoiditis (TB arachnoiditis). We did this study to investigate the efficacy and safety of cyclophosphamide as adjuvant therapy for post TB arachnoiditis refractory to corticosteroids and anti-tubercular therapy (ATT). Methods: This was a retrospective case series of patients of refractory post TB arachnoiditis leading to paraparesis and vision loss who received cyclophosphamide as an adjuvant therapy along with standard ATT and corticosteroids. These patients were treated with intravenous cyclophosphamide (dose 500 mg/m2) once a month for 4 consecutive months after informed written consent and were assessed clinically and radiologically before and after cyclophosphamide therapy. Results: We had 4 patients with refractory post TB arachnoiditis of whom three became independently ambulatory. There was significant clinical as well as radiological improvement in all the patients. Conclusions: Cyclophosphamide therapy could be an effective therapy for patients with refractory post TB arachnoiditis. Well-designed randomized controlled studies are essential to study the safety and efficacy of cyclophosphamide in this condition. © 2021 Tuberculosis Association of India
Estimation of evapotranspiration using surface energy balance system and satellite datasets
(Elsevier, 2020) Garima Shukla; Prasoon Tiwari; Vikas Dugesar; Prashant K. Srivastava
Study of actual evapotranspiration (ET) at regional scale is essential in order to facilitate proper irrigation practices. This chapter depicts the usage of satellite-based remote sensing data and Geographical Information System (GIS) for evaluating changes in actual evapotranspiration over the time-period of 20 years. This work implemented the use of Surface Energy Balance System (SEBS), a physically based model for estimation of turbulent heat transitions and territorial evapotranspiration at regional scale using RS techniques during winter season. This study was carried out using Landsat 8-OLI and Landsat-TM to achieve the desired objectives at study site of Chhatarpur and Panna zones of Madhya Pradesh, India. Actual ET estimated from the SEBS model was found to be significant and influenced by the land-use change that occurred during the 20 years’ time-period. Land-cover changes that occurred in 20 years duration affected the ET rate and may cause changes in irrigation practices in the study area. © 2021 Elsevier Inc. All rights reserved.
Late-stage Deccan eruption from multiple shallow magma chambers through vertical flow along fissures: Insights from magnetic fabric analysis of the Pachmarhi dyke swarm
(Elsevier B.V., 2024) Garima Shukla; Jyotirmoy Mallik; Yadav Krishna; Sayandeep Banerjee
The Pachmarhi dyke swarm, located in the eastern part of the Narmada-Satpura-Tapi dykes belonging to the Deccan Continental Flood Basalt, are studied using the Anisotropy of Magnetic Susceptibility (AMS) technique. This research aims to determine the direction and sense of magma flow within the dykes, providing insights into the depth, number, and location of magma chambers, as well as the geodynamics of their plumbing system. Petrography and rock magnetism analyses revealed a mixture of high- and low-titanium magnetite particles, predominantly of pseudo-single domain nature (with a smaller proportion of multi-domain dominated) grains are primary remanence carriers. We identified four distinct types of magnetic fabric (I-IV) within the Pachmarhi dykes. The K1-axis being parallel to the dyke plane, and the intersection of the imbrication angle of magnetic foliation (for oblate fabric) and magnetic lineation (for prolate fabric) was used to discern the direction of magma flow. This analysis revealed multiple trends of magma flow, ranging from vertical/sub-vertical to inclined. The flow fabric provides valuable information about the presence of multiple shallow sub-crustal magma chambers. This interpretation aligns with prior independent gravity and 3-D density modelling studies, which indicates the presence of dense mafic magma bodies at depths of 4 to 8 km along the Narmada-Tapi intraplate rift zone. These findings are similar to those observed in the Nandurbar-Dhule dyke swarms in the western region of the Narmada-Satpura-Tapi dykes. Consequently, we can infer that the emplacement of dykes in the Pachmarhi region of the Narmada-Son-Lineament, which likely served as feeders for the late-stage Deccan volcanism, was primarily facilitated by a “polycentric flow” mechanism. In this process, magma was injected vertically from multiple shallow magma chambers through crustal fissures, potentially feeding into the late-stage Deccan flow units, such as the Ambenali or Mahabaleshwar Formations. © 2024 Elsevier B.V.