Conference Proceedings

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    Effect of frequency on plasma electrolytic oxidation of zirconium in pulsed unipolar mode
    (IOP Conf. Series: Materials Science and Engineering, 2019) Parfenov, E. V.; Mukaeva, V. R.; Farrakhov, R. G.; Saikiran, A.; Hariprasad, S.; Manoj, P.; Lokesh, E.; Rameshbabu, N.
    Using the method of in situ impedance spectroscopy, an optimization of plasma electrolytic oxidation (PEO) was performed, and the influence of the pulse frequency was evaluated for the coating of Zr-1Nb alloy. It was shown that the in situ impedance modulus decreased with increasing the pulse frequency in a pulsed unipolar mode. Also, the protective properties of the coating improved with frequency; this was attributed to the increase in the uniform distribution of the microdischarges over the sample surface. As a result, the optimal frequency range of PEO was justified based on the impedance spectroscopy studies.
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    Impact of Tamarindus Indica biodiesel blends on performance and exhaustemissions characteristics of light duty compression ignitionengine
    (Materials Today: Proceedings, 2021) Jayashri N Nair; Satyanarayana Murthy, Y.V.V.
    Tamarind (Tamarindus Indica) is an integral part of South Indian cuisine. Its pulp is used to add sourness to southIndian curries. However tamarind seeds which are having a considerable amount of lipid in it are thrown away. Ourmain objective is to produce Tamarind biodiesel (TB) from tamarind seed oil and investigate its effect onperformance and exhaust emissionsof CI engine. Oil was extracted from Tamarind seeds and was converted to biodiesel by transesterification process with NaOH as catalyst. Tests were performed using TB5, TB10, TB15 blendswith 1500 rpm rated speed and compression ratio of18. The performance test results revealed that BTE of B15 wasgreater in comparison to other blends as well as diesel . However BSFC for TB blends were greater compared to neat diesel . Considerable reductions in exhaust emissions were observed with TB blends. TB10 showed apical reductionof 27% in CO and 15% reduction in smoke. TB5 showed 25% HC reduction followed by TB10 with 19.25% reductions.TB15 showed 19.36% of highest NOx reduction followed by TB10 with 10.7% NOx reduction. TB10 proved to giveoptimum test results for performance and emissions. From the results it can be concluded that TB can be consideredas a viable option for biodiesels.
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    Machine learning methods for marine systems
    (IOP Conference Series: Materials Science and Engineering, 2021) Thangalakshmi, S.; Sivasami, K.
    Automation plays a key role in shipping industry and aims towards minimal operating staff. However, the effective automation relies on effective controlling at various levels starting from shipbuilding to navigation. The industry is currently focussing on autonomous shipping which actually requires precise controlling. Although many conventional methods are available for control and automation with regard to automation, Artificial Intelligence Schemes (AIS) are widely attracting the maritime sector because of their benefits. The AIS along with fuzzy logic systems are offering promising results. The emerging use of AIS in a variety of maritime applications can act as a reference wpoint for new researchers. This paper aims to conduct a valid AIS study and to examine the various machine learning approaches used in various maritime applications. It is possible to achieve complete automation in the shipping industry by implementing a related technique.
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    Prediction of manoeuvring behaviour of an offshore supply vessel by using simulation program
    (Proceedings of MARTEC 2010 The International Conference on Marine Technology, 2010-12) Mohd Noor, Che Wan.; Muzathik, Abdul Majeed.; Wan Nik, Wan Mohd Norsani.; Ahmad, Mohammad Fadhli.; Samo, Khalid.; Balaji, Rajoo.
    Manoeuvring ability of Offshore Supply Vessel (OSV) is a very critical aspect. An early prediction of vessel behaviour will definitely help to improve upon the design. The regular methods available for manoeuvring prediction such as free running model test, captive model test etc., are found to be expensive and time consuming. As an alternative, the current approach tries a numerical simulation method with parameters determined from a database. This study presents the manoeuvring prediction of an OSV which includes the development of time domain simulation program by using Matlab Simulink software. Three degrees of freedom were considered and applying the Newtonian laws, the equations of motion were framed. Further, forces on hull, forces and moments induced by propeller and rudder were also taken into reckoning. Results were obtained with inputs of vessel speeds, engine revolutions etc. Validation of the prediction results was also carried out by comparing the results with full-scale sea trial data. The prediction results show a good agreement with the sea trial data. Applying approximate numerical formula for manoeuvring prediction is seen to be a reliable and economic prediction tool at early design stages of such vessels.
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    Surface modification of CP-Ti metallic implant material by plasma electrolytic oxidation
    (IOP Conf. Series: Materials Science and Engineering, 2019) Rameshbabu, N.; Ravisankar, B.; Saikiran, A.; Parfenov, E. V.; Valiev, R. Z.
    Plasma electrolytic oxidation (PEO) is a relatively new and environmentally friendly process for development of thick and adherent oxide coatings on conventional and nanostructured metallic implant materials. The PEO process involves anodic oxidation of metals or alloys in aqueous solutions at voltages higher than the breakdown voltage of the oxides present on its surfaces. Currently, the PEO process is gaining increased attention as a novel technique for the fabrication of corrosion resistant, bioactive and functionally modulated composite coatings on commercial pure titanium (Cp-Ti) and Ti based alloys for orthopedic and dental applications. The PEO process coupled with the electrophoretic deposition (EPD) technique is used for the fabrication of TiO2/hydroxyapatite (HA) composite coating on a Cp-Ti implant material in a single step. This paper briefly reviews the properties of the coatings produced on Cp-Ti by PEO and PEO coupled EPD processes.