Browsing by Author "Jena, S."

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    Bearing ratio behaviour of sisal geotextile reinforced fly ash overlying clay
    (Taylor and Francis Ltd., 2025) Jena, S.; Khatri, V.N.; Nainegali, L.
    The paper examines the bearing ratio behaviour of sisal geotextile reinforced fly ash over clay. It also evaluates the effects of alkali treatment and emulsion coating of the geotextile on the bearing ratio at optimal placement depths. Results show that using one, two, and three layers of untreated geotextile increased the CBR by 19.6%, 55%, and 78% at different placement depths (1.5B, 1B, and 0.5B), where B is the plunger diameter. Alkali-treated and emulsion-coated geotextiles increased the CBR by 24.6% and 15.6%, respectively. However, soaking reduced the CBR by 76.6%, with the greatest decrease observed in triple-reinforced alkali-treated samples. Punching tests and morphological analyses supported the study outcomes. A numerical study of a pavement section, based on the experimental results, recommends sisal geotextile for rural roads using load equivalency factors and the structural number approach. © 2025 Informa UK Limited, trading as Taylor & Francis Group.
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    Human-in-the-Loop Control and Security for Intelligent Cyber-Physical Systems (CPSs) and IoT
    (Springer, 2023) Jena, S.; Sundarrajan, S.; Meena, A.; Chandavarkar, B.R.
    In this era of connectivity and digitization, our appliances and equipment are becoming more intelligent and interlinked, creating an Internet of Things (IoT) that can be used to support new kinds of intelligent cyber-physical systems (CPSs). With the massive growth of CPSs, humans have become more involved within this structure. These types of CPSs/IoT systems containing humans are called human-in-the-loop cyber-physical systems (HiTLCPSs)/human-in-the-loop Internet of Things (HiTLIoT). The involvement of humans results in an external and unpredictable element that increases security concerns. This chapter proposes a unique “human-centric†framework to mitigate these issues, enabling humans as crucial components to make the CPS/IoT systems more robust and secure. Through this, the chapter tries to focus on “humans are a solution†rather than “humans are a problem.†Furthermore, the chapter looks into various components that make up the framework, how they are interlinked and how security can be bolstered with a human in the loop combined with this framework. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
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    Numerical Study on Bearing Capacity Estimation of Circular Footing on Sand Reinforced with Sisal Geotextile
    (Springer Science and Business Media Deutschland GmbH, 2025) Jena, S.; Khatri, V.N.; Nainegali, L.
    This paper presents a study on estimating the bearing capacity of shallow circular footings on sand. In this regard, finite element analysis is conducted, assuming that the sand follows Bolton’s model with a relative density of 75%. Initially, the bearing capacity is determined for unreinforced sand conditions, followed by the placement of geotextile at different depths. The results indicate a significant increase in the ultimate bearing capacity of the footing, up to 2.68 times, compared to the unreinforced case, precisely when the geotextile is placed at a depth of 0.25 times the footing diameter. These findings suggest that sisal geotextile can effectively serve as a reinforcement material for addressing various temporary foundation-related problems. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.
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    Study on Physical, Mechanical, Morphological, and Crystallographic Properties of Chemically Treated Sisal Fibers
    (Korean Fiber Society, 2024) Jena, S.; Khatri, V.N.; Nainegali, L.; Dutta, R.K.
    This research is focused on the physical, mechanical, morphological, elemental, and crystallographic properties of untreated, chemically treated, and emulsion-coated sisal fibers. Physical properties, such as diameter and water absorption, were investigated, while mechanical properties, including tensile strength, elongation at break, and modulus of elasticity, were assessed. The findings indicate a significant enhancement in tensile strength (up to 96.7%) and elastic modulus values (up to 214.43%) after chemical treatment, accompanied by a decrease in elongation at break (up to 56.8%). Interestingly, emulsion coating reduced the tensile strength and elastic modulus values, with a marginal increase in elongation at break for treated fibers. The fibers subjected to benzoylation exhibited the highest tensile strength and elastic modulus, followed by alkali-treated fibers. This trend was consistent for emulsion-coated fibers as well. The study outcomes were substantiated by examining the morphological, elemental, and crystallographic aspects of untreated and treated/coated fibers, indicating their suitability for diverse engineering applications. © The Author(s), under exclusive licence to the Korean Fiber Society 2024.