Browsing by Author "John, A."

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    A Study on Morphodynamic Nature of Muthalapozhi Fishery Harbour in Kerala Using Geospatial Approach
    (Springer Science and Business Media Deutschland GmbH, 2023) Paravath, K.; John, A.; Nasar, T.
    It is crucial to monitor the dynamics of any fragile coastal stretch on a regular basis. Shorelines on both sides of Muthalapozhi tidal inlet, which is located along Kerala coast in India, were modified after the construction of breakwaters for a fishing harbour. The fishing harbour work was initiated in 2002. Severe erosion at the immediate North of the breakwater and choking of harbour mouth due to spit formation was observed. The construction of modified breakwaters began in 2013, after resolving the deficiencies in the first phase. Coastal morphology needs to be further analysed to check the adequacy of the breakwaters. An attempt to study the dynamicity of coastal morphology of Muthalapozhi Harbour using geospatial approach is reported in this paper. In response to the breakwater construction, End Point Rate (EPR) and Linear Regression Rate (LRR) are calculated using Digital Shoreline Analysis System (DSAS) in ArcGIS software. The results indicate that high accretion with a maximum rate of 209 m/year in the year 2019 is observed on the immediate southern side of the south breakwater. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
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    Micro-tribological Characteristics of Ti6Al4V Alloy Subjected to Shot Blasting Surface Treatment Process
    (Springer, 2023) John, A.; Showket, J.; Joseph Babu, K.; Edachery, V.; Suvin, P.S.
    Ti6Al4V has remarkable mechanical and physical qualities, but its usage in many applications is constrained by its inferior tribological properties. In this study, Ti6Al4V was shot-blasted with aluminum oxide to enhance the surface hardness and reduce the real area of contact, thereby improving the tribological properties of the metal surface. The data obtained from reciprocating tribometer, optical profilometer, SEM, and EPMA infer considerable improvement in tribological properties and impart information on wear mechanisms attributing to an increase in wear resistance up to 76%. © 2023, The Indian Institute of Metals - IIM.