Faculty Publications
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Publications by NITK Faculty
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Item Influence of wave and structure parameters on tranmission characteristics of himmf pipe breakwater with five layers([publishername] World Scientific, 2011) Mane, V.; Rajappa, S.; Rao, S.; Hegde, A.V.The paper presents the part results of a series of physical model scale experiments conducted for the study of variation of transmission coefficient Kt due to the horizontally interlaced multi-layered moored floating pipe (HIMMFP) breakwater. The studies were conducted on physical breakwater models having five layers of PVC (Poly Vinyl Chloride) pipes with wave steepness, Hi/gT2 (Hi=incident wave height, g=acceleration due to gravity and T=wave period) varying from 0.063 to 0.849; relative width, W/L (W=width of breakwater and L=wavelength) varying from 0.400 to 2.650 and relative spacing, S/D=3 (S=horizontal centre to centre spacing of pipes and D=diameter of pipe). The transmitted wave heights were measured, and data gathered was analyzed by plotting non-dimensional graphs depicting the variation of Kt with Hi/gT2 for values of d/W (d=depth of water) varying from 0.082 to 0.276; and also variation of Kt with W/L for values of Hi/d varying from 0.060 to 0.400. © 2019, World Scientific. All rights reserved.Item Biometric-Based Authentication in Online Banking(Springer Science and Business Media Deutschland GmbH, 2023) Hublikar, S.; Pattanashetty, V.B.; Mane, V.; Pillai, P.S.; Lakkannavar, M.; Shet, N.S.V.The use of technology has become the integral part of human life. Most importantly the introduction of Internet has made the lives of people easy and due to its cost effectiveness; usage of Internet by people has been increased. The Internet has made the people to move toward the online mode of transaction. Banks recommend their customers to use Internet banking facility and assure it as a safest mode of transaction but it is associated with huge risk. The continuous rise in online banking brings several security issues and increased cost of implementing higher security systems for banks and customers. Present online banking technology works on 2-Factor authentication mode, i.e., it works on both transaction level and authentication level. The main problem associated with 2-Factor authentication is that there may be risk associated, like cyberattack (SIM swapping fraud), etc., so we have proposed a biometric authentication technique which makes transaction more secure. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.Item Effect of data normalisation in estimating wave overtopping discharge parameter of semicircular breakwater using ANN and Random Forest.(Institute of Physics, 2023) Shankara Krishna, A.; Mane, V.; Rao, S.; Rao, M.Breakwaters are the structures constructed in the coastal areas to maintain calm inside the port or prevent beach erosion. Semi-circular Breakwater (SCB) is an innovative type of Breakwater made of hollow caisson on a base slab with or without perforations. In this study, the wave overtopping discharge parameter of an SCB is estimated using Artificial Neural Network and Random Forest. The data is collected and used in the current research from an experimental investigation conducted in the Wave Mechanics Laboratory of the Department of Water Resources and Ocean Engineering (WROE), NITK Surathkal. Using this experimental data, the ANN and Random Forest models are developed for the prediction of the wave overtopping discharge parameter of an SCB. The performance of the models is evaluated using different statistical parameters. Data with and without normalisation are used separately to check the effect of normalisation in the prediction of wave overtopping discharge parameter using ANN and Random Forest. From the results, it is found that ANN gives better results when the data is normalised. The performance of Random Forest is independent of the data normalisation. © Published under licence by IOP Publishing Ltd.Item Peak mooring forces in the horizontal interlaced multi-layered moored floating pipe breakwater(Society of Naval Architects of Korea, 2011) Mane, V.; Rajappa, S.; Rao, S.; Hegde, A.V.Present study aims to investigate the influence of relative breakwater width W/L (W=width of breakwater, L=wavelength), wave steepness Hi/gT2 (Hi=incident wave height, T=wave period) and relative wave height d/W (d=water depth) on forces in the moorings of horizontal interlaced multi-layered moored floating pipe breakwater (HIMMFPB) model. Studies were conducted on scaled down physical models having three layers of Poly Vinyl Chloride (PVC) pipes, wave steepness Hi/gT2 varying from 0.063 to 0.849, relative width W/L varying from 0.4 to 2.65 and relative spacing S/D=2 (S=horizontal centre-to-centre spacing of pipes, D=diameter of pipes). Peak mooring forces were also measured and data collected is analyzed by plotting non-dimensional graphs depicting variation of fs/?W2 (fs=Sea side Mooring force, ?=specific weight of water) & fl/?W2 (fl=Lee side Mooring force) with Hi/gT2 for d/W varying from 0.082 to 0.276 and also variation of fs/?W2 and fl/?W2 with W/L for Hi/d varying from 0.06 to 0.400. © SNAK, 2011.Item WAVE OVERTOPPING CHARACTERISTICS OF NON-PERFORATED AND SEASIDE PERFORATED EMERGED QUARTER-CIRCLE BREAKWATER(Department of Naval Architecture and Marine Engineering, 2023) Mane, V.; Rao, S.; Lokesha, u.; Hegde, A.V.A breakwater is a structure used to dissipate the wave energy in order to protect the shore and maintain tranquility inside the harbor basin. The quarter-circle breakwater (QBW) constitutes a quarter circular front wall facing incident waves, a vertical rear wall, and a horizontal base slab placed on a rubble mound foundation. In this study, a comprehensive experimental investigation is carried out in order to examine the wave overtopping characteristics of an emerged non-perforated and seaside perforated emerged quarter-circle breakwater subjected to regular waves. A model scale of 1:30 is selected based on the limitations of testing facilities. For the current investigation, an emerged QBW models of the radius 0.50 m is utilized. The model is tested for six different perforations ranging between 0% and 20%, with a constant perforation radius of 0.016 m. The paper highlights the influence of wave steepness (Hi/gT2), relative crest freeboard (Rc/Hi), relative water depth (d/gT2) on the wave overtopping performance of the seaside perforated and non-perforated QBW models. An increase in wave steepness is found to increase the dimensionless mean wave overtopping discharge. Also, an exponential decrease in dimensionless mean wave overtopping discharge is observed with an increasing relative freeboard. The relative freeboard is found to be one of the predominant parameters influencing the wave overtopping discharge rate. © 2023 ANAME Publication. All rights reserved.Item Assessment Of Wave Overtopping Discharge at Quarter Circle Breakwater Using Soft Computing Techniques(Universidad de Cantabria, 2024) Mane, V.; Shankara Krishna, A.; Rao, M.; Rao, S.The precise prediction of wave overtopping (WO) discharge is crucial for the design of coastal protection structures, particularly in light of the challenges posed by climate change. This study focuses on a quarter-circle breakwater (QBW) comprising a vertical back wall, a horizontal base slab on a rubble mound foundation, and a quarter-circle front wall facing incident waves. Utilizing Support Vector Machine (SVM) and Least Square Support Vector Machine (LSSVM), the research aims to estimate the mean overtopping discharge at the QBW. Input parameters, including incident wave steepness (Hi/gT2), depth parameter (d/gT2), percentage of perforations (p), and crest height parameter (Rc/Hi), are employed, with mean overtopping discharge (q/gHi T) as the output. Model performance is assessed using indicators such as Root Mean Square Error (RMSE), Correlation Coefficient (CC), Scatter Index (SI), and Index of Agreement (d). Results suggest that both SVM and LSSVM are effective in estimating mean overtopping discharge, with LSSVM demonstrating superior accuracy compared to SVM. The study findings contribute valuable insights for coastal engineering, particularly in designing structures resilient to wave overtopping amid ongoing climate change effects. © SEECMAR | All rights reserved.