Browsing by Author "Kumar, Ankit"

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    PublicationArticle
    A cognitive model for adopting ITIL framework to improve IT services in Indian IT industries
    (IOS Press BV, 2020) Dayal, Rasbihari; Vijayakumar, V.; Kushwaha, Rahul Chandra; Kumar, Abhishek; Ambeth Kumar, V.D.; Kumar, Ankit
    This research paper presents a cognitive model which manages to minimize the issues of the Information Technology Infrastructure by incorporation of service management practices. The importance of this research is that this model can be replicated in other companies for the distribution of products that wish to implement improvements in their management process technological services. This work introduces the use of Information Technology Infrastructure Library or ITIL as best practice, essential methodologies for IT Management, historical evolution, methodology, service life cycle, and ITIL certifications. Service automation is widely regarded as the usefulness and improves service guarantee. One of the most useful features of automation services is that the process will run the same way every time. Such precision in the execution of repetitive executions is virtually impossible when it comes to human labor. Therefore, the automation is the best way to improve the efficiency of the service provider and the next steps of the process. © 2020 - IOS Press and the authors. All rights reserved.
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    Black hole attack detection in vehicular ad-hoc network using secure AODV routing algorithm
    (Elsevier B.V., 2021) Kumar, Ankit; Varadarajan, Vijayakumar; Kumar, Abhishek; Dadheech, Pankaj; Choudhary, Surendra Singh; Kumar, V.D. Ambeth; Panigrahi, B.K.; Veluvolu, Kalyana C.
    Vehicular ad hoc networks (VANETs) has received significant attention in the research domain of intelligent transportation system (ITS) as they provide safety and security to drivers and passengers. As compared to mobile ad hoc networks (MANETs), VANETs are mainly different in terms of characteristics, and system architecture. Security in VANET has been an important issue as it effects the communication between both (V-2-V) vehicles-to-vehicle and (V-2-I) vehicle to infrastructure. In VANET, malicious attacks affect the security of the networks, and it is necessary to identify and prevent such security attacks. In VANET network, any node can function as a router for the others nodes, and a malicious node connected to the network may inject spoofed routing tables to the other nodes thereby affecting the operation of the network. To overcome this issue, a secure AODV routing protocol is developed for detection of black hole attack in this paper. The proposed method is a modified version of the original AODV routing protocol with improvements in the RREQ packet and RREP packet protocols. For added security, a cryptography function-based encryption and decryption is included to verify the source and destination nodes. The proposed approach is demonstrated on a NS-2.33 simulator using different network parameters like drop packets, end-to-end delay, and packet delivery ratio (PDR) and routing request overhead. Results demonstrate that the proposed method outperforms existing AODV routing protocol under black hole attack and improves the network performance. © 2020 Elsevier B.V.
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    PublicationReview
    Degradation of Xenobiotic Pollutants: An Environmentally Sustainable Approach
    (MDPI, 2022) Miglani, Rashi; Parveen, Nagma; Kumar, Ankit; Ansari, Mohd. Arif; Khanna, Soumya; Rawat, Gaurav; Panda, Amrita Kumari; Bisht, Satpal Singh; Upadhyay, Jyoti; Ansari, Mohd Nazam
    The ability of microorganisms to detoxify xenobiotic compounds allows them to thrive in a toxic environment using carbon, phosphorus, sulfur, and nitrogen from the available sources. Biotransformation is the most effective and useful metabolic process to degrade xenobiotic compounds. Microorganisms have an exceptional ability due to particular genes, enzymes, and degradative mechanisms. Microorganisms such as bacteria and fungi have unique properties that enable them to partially or completely metabolize the xenobiotic substances in various ecosystems.There are many cutting-edge approaches available to understand the molecular mechanism of degradative processes and pathways to decontaminate or change the core structure of xenobiotics in nature. These methods examine microorganisms, their metabolic machinery, novel proteins, and catabolic genes. This article addresses recent advances and current trends to characterize the catabolic genes, enzymes and the techniques involved in combating the threat of xenobiotic compounds using an eco-friendly approach. © 2022 by the authors.
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    Geomorphological and mineralogical analysis of the lunar Robertson crater
    (Elsevier Ltd, 2025) Raju, Ashwani; Imran, Saraah; Kumari, Jiwantika; Kumar, Ankit; Singh, Ramesh P.
    This study provides a comprehensive overview of the lunar Robertson crater of Copernican period located on the far side of the moon using multi-sensor satellite observations from combined Chandrayaan-I M3, LROC WAC Global Geomorphology and SELENE DTM mosaics. The analysis shows development of dynamic features, distribution of minerals, and topographic features during the crater formation. The crater preserves a complex geological evolution based on the mineralogical heterogeneity and distinct geomorphological features (such as accumulated melt flow at the crater floor, topographic undulations etc.) observed in a radial symmetry, which suggest formation through high energy impact processes. The detailed investigation of melt pool topography at the crater floor, highlights the formation and subsequent modifications of the transient cavity developed during simple to complex crater transition after the impact. The mineral species identified using the RELAB spectral library through the ‘spectral hourglass’ workflow show a distinct distribution, with Mg-spinel and olivine-rich lithologies concentrated in the central peak, while pyroxenes dominate the crater floor and surrounding rock rings. This pattern shows a complex mineral distribution, likely excavated from different depths as a result of the impact event. The dynamics of crater formation show a diameter respectively of 4.36 km and 5.73 km, assumed for chondrite and iron projectiles. Besides, CSFD measurements represent an absolute age of about 82 ± 4 Ma based on the 121 isochron fits to the differential data of post-impact craters that suggests recent resurfacing consistent with melt flow during the terminal stages of impact dynamics. © 2025 COSPAR
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    In Search of Novel SGLT2 Inhibitors by High-throughput Virtual Screening
    (Bentham Science Publishers, 2024) Debnath, Abhijit; Sharma, Shalini; Mazumder, Rupa; Mazumder, Avijit; Singh, Rajesh; Kumar, Ankit; Dua, Arpita; Singhal, Priya; Kumar, Arvind; Singh, Gurvinder
    Background: Type 2 diabetes mellitus constitutes approximately 90% of all reported forms of diabetes mellitus. Insulin resistance characterizes this manifestation of diabetes. The prevalence of this condition is commonly observed in patients aged 45 and above; however, there is an emerging pattern of younger cohorts receiving diagnoses primarily attributed to lifestyle-related variables, including obesity, sedentary behavior, and poor dietary choices. The enzyme SGLT2 exerts a negative regulatory effect on insulin signaling pathways, resulting in the development of insulin resistance and subsequent elevation of blood glucose levels. The maintenance of glucose homeostasis relies on the proper functioning of insulin signaling pathways, while disruptions in insulin signaling can contribute to the development of type 2 diabetes. Objective:  Our study aimed to identify novel SGLT2 inhibitors by high-throughput virtual Screening. Methods:  We screened the May bridge Hit Discover database to identify potent hits followed by druglikeness, synthetic accessibility, PAINS alert, toxicity estimation, ADME assessment, and consensus molecular docking. Results:  The screening process led to the identification of three molecules that demonstrated significant binding affinity, favorable drug-like properties, effective ADME, and minimal toxicity. Conclusion: The identified molecules could manage T2DM effectively by inhibiting SGLT2, providing a promising avenue for future therapeutic strategies. © 2024 Bentham Science Publishers.
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    Integrated Assessment of the Hydrogeochemical and Human Risks of Fluoride and Nitrate in Groundwater Using the RS-GIS Tool: Case Study of the Marginal Ganga Alluvial Plain, India
    (Multidisciplinary Digital Publishing Institute (MDPI), 2024) Gupta, Dev Sen; Raju, Ashwani; Patel, Abhinav; Chandniha, Surendra Kumar; Sahu, Vaishnavi; Kumar, Ankit; Kumar, Amit; Kumar, Rupesh; Refadah, Samyah Salem
    Groundwater contamination with sub-lethal dissolved contaminants poses significant health risks globally, especially in rural India, where access to safe drinking water remains a critical challenge. This study explores the hydrogeochemical characterization and associated health risks of groundwater from shallow aquifers in the Marginal Ganga Alluvial Plain (MGAP) of northern India. The groundwater chemistry is dominated by Ca-Mg-CO3 and Ca-Mg-Cl types, where there is dominance of silicate weathering and the ion-exchange processes are responsible for this solute composition in the groundwater. All the ionic species are within the permissible limits of the World Health Organization, except fluoride (F−) and nitrate (NO3−). Geochemical analysis using bivariate relationships and saturation plots attributes the occurrence of F− to geogenic sources, primarily the chemical weathering of granite-granodiorite, while NO3− contaminants are linked to anthropogenic inputs, such as nitrogen-rich fertilizers, in the absence of a large-scale urban environment. Multivariate statistical analyses, including hierarchical cluster analysis and factor analysis, confirm the predominance of geogenic controls, with NO3−-enriched samples derived from anthropogenic factors. The spatial distribution and probability predictions of F− and NO3− were generated using a non-parametric co-kriging technique approach, aiding in the delineation of contamination hotspots. The integration of the USEPA human health risk assessment methodology with the urbanization index has revealed critical findings, identifying approximately 23% of the study area as being at high risk. This comprehensive approach, which synergizes geospatial analysis and statistical methods, proves to be highly effective in delineating priority zones for health intervention. The results highlight the pressing need for targeted mitigation measures and the implementation of sustainable groundwater management practices at regional, national, and global levels. © 2024 by the authors.
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    Magnetic susceptibility mapping of roadside pollution in the Banaras Hindu University campus, Varanasi, India
    (Indian Academy of Sciences, 2021) Banerjee, Sayandeep; Kumar, Ankit; Rana, Virendra; Maity, Sayan; Srivastava, Hari B.
    Among the several methods to determine anthropogenic pollutants in the soil, magnetic susceptibility measurements have proven to be useful for rapid and effective diagnosis of magnetic particles and overall screening of pollution. Magnetic particles and other heavy metals accumulated in the topsoil as a result of roadside pollution, contribute to the bulk magnetic susceptibility (χ ). Thus, χ values of the soil can be utilized as a proxy to delineate the zones of high and low roadside pollution in an area. In this study, magnetic susceptibility measurements of the topsoil have been carried out and a quantitative assessment of roadside pollution in the Banaras Hindu University (BHU) campus, Varanasi, India is presented. Based on the χ values of 212 soil samples covering 1300 acres of the campus, zones of high and low roadside pollution are demarcated. The present study has not only deciphered the spatial variation of pollutants in the BHU campus, but has also characterized the magnetic phases responsible for the susceptibility signal on the roadsides inside the campus. The obtained results are crucial for environmental monitoring and prioritization of land use and other anthropogenic activities inside the BHU campus. The modus operandi adopted here would be beneficial for mapping areas exposed to different levels of pollution intensity, for tracing the pollution transport and can be effectively applied to various ecosystems © 2021. Current Science. All Rights Reserved.
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    PublicationReview
    Tectonometamorphic evolution of the Nappes and Klippes of the NW Lesser Himalaya, India: A review
    (Geological Survey of India, 2021) Das, Biraja P.; Joshi, Mallickarjun; Patel, Shubham; Kumar, Ankit
    A salient regional offshoot of the crustal shortening during the Himalayan continental collision are the southward thrust Higher Himalayan metamorphic rocks that once spread as a thrust sheet cover over the Lesser Himalayan sedimentary sequences. The metamorphic nappes in the Kumaun Lesser Himalaya are essentially the detached erosional remnants of this once uninterrupted thrust sheet. Among these detached tectonic outliers, the Almora-Jajarkot Nappe perhaps the largest in the world, comprises a 15 to >30 km wide linear tract that occupies sizable areas of the Kumaun and western Nepal. Ramgarh Thrust that tectonically separates the underlying sedimentary rocks/volcano-sedimentary rocks of the Krol Nappe from the intensely mylonitized granite gneisses overlain by phyllites and low grade schists of Nathuakhan Formation of the Ramgarh Group marks the base of the Ramgarh Nappe. Invariably, the Almora Nappe tectonically overlies the Ramgarh Nappe, and the base of the overlying Almora Nappe is marked by the Almora Thrust. The Almora Group rocks comprise alternating pelite and psammite sequences metamorphosed under greenschist to upper amphibolite facies metamorphic conditions. The Lansdowne, Baijnath, Askot, Chhiplakot and Dharamghar Klippes represent remnants of this colossal thrust sheet. The Ramgarh and Almora thrusts relocated these nappes from the Higher to the Lesser Himalaya during the Himalayan orogeny. The granitic gneisses of the Askot Crystallines have been dated at 1983±80 Ma. The contact metamorphic aureole around the Cambrian Champawat Granitoids (560±20 Ma) that intrude the regionally folded metamorphic rocks of the Almora Group conclusively suggest that the dominant regional metamorphism in the Almora Nappe and associated Klippes is likely Precambrian and unrelated to the Tertiary Higher Himalayan metamorphism. © 2021 Society for Scientific Exploration. All rights reserved.