Conference Proceedings
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Item Linking Leadership Integrity - Depression, Anxiety and Stress (DAS) among Sailing Indian Marine Engineers During Covid-19(Barcelona School of Nautical Studies, Barcelona, 2024-06-05) Mitra, Toorban; Pattanaik, Krushna MohanModern-day leadership demands competencies to embrace challenges and uncertainties as a part of a working career. Uncertainties bring in many unknown outcomes and a loss of direction to any team. This is much acknowledged when the unknown outcomes are affecting the team spirit and, in turn, organisational sustainability. Leadership integrity is a watershed to handle such uncertainties with positive outcomes. Like in any other business domain, uncertainties are part of the business in shipping. However, there are specific instances in the nature of COVID-19 that came with many challenges, like extended work contracts, no shore leaves, infrequent crew change, quarantine rules before sign-in, online surveys, etc. Such an uncertain and challenging work environment on board a ship (which itself is an organisation) results in anxiety, stress and depression. In this context, leadership integrity provides much-needed direction and can create a healthy work environment in any organisation. It is in this context that this paper tries to measure this hypothesis in an explorative study, particularly among active marine engineers who worked on board ships during the COVID-19 pandemic. Such knowledge facilitates the understanding of organisational behaviour during challenging times and provides a timely prescription for organisational success during uncertainties and challenging times with much significant focus on the integrity of leaders.Item Logistics performance as facilitator to trade performance: An Indian perspective(The International Maritime Transport and Logistics Conference "MARLOG 13", 2024-03-03) Dasgupta, Mrinal Kumar; Mitra, Toorban; Pattanaik, Krushna MohanWith the growing realisation of the importance of global integration in the production and consumption value chain, the importance of maritime logistics and transportation facilitating international trade is profoundly recognised. Further, a proliferation of collaborative trade agreements among different trade partners is ascribed to play a significant role. However, such external dynamics and engagements in international trade would propel blue economic growth if backed by strong maritime logistics initiatives and establishment. In this context, deep routed challenges, particularly in the domestic maritime logistics sector in manufacturing hubs like India, could potentially hamper her comparative advantages in international trade. It is in this context that this paper comes as an intercession by analysing India’s Logistics Performance Index (LPI) and its impact on trade performance. Also, this paper provides a comparative analysis of India’s LPI with that of other trade competitors from South and East Asia and tries to find out challenging areas of maritime logistics for India and suggest the required policy prescription thereof. Such acknowledgement is a compulsion for a country like India when escalated uncertainties due to episodes of COVID-19, the Russia-Ukraine War, and dips in the business cycles of many countries that demanded green and resilient supply chain and logistics practices. The paper prescribes that domestic reforms to ease out challenges in Indian maritime logistics coupled with external engagements would provide a flat form for India to reap the optimal gains from international trade.Item Overcoming the Traditional Barriers and Reaching the Users at the Doorstep with the Trending Technology(VICLIS2021, 2021) Padmashree, Samavedam; Sasikala, CahgariItem A Study on the challenges and opportunities of reverse logistics innovation in rural areas(International Conference on Innovation and management: The Way Ahead, 2022-09-29) Ajay Kumar, Kanithi; Adinarayana Rao, U. V.; Bhanu Prakash, N.Reverse logistics (RL) is a dynamically evolving process, where goods meant for returns or repairs move from the customer to the producer. This study is an attempt to explore the current status, challenges and opportunities in RL with a focus on selected rural areas. The study proposes certain pertinent innovative measures for the implementation of RL in underserved rural areas. Related case studies were used to illustrate the possible impact of RL innovation. By using empirical findings from case studies, it can be shown that some fundamental differences in logistics innovation exist. To identify possible reverse logistic innovations in rural areas, this study had undertaken an extensive literature review accompanied with personal interaction and observations with the various logistics service providers (LSPs). Along with the opportunities, the barriers in front of the establishment of a RL system and the contribution of innovation in overcoming these challenges are discussed.Item Numerical computation of Boil off Rate (BoR) in shipboard LNG tanks(IOP Publishing, 2022) Eswara, Arun Kishore; Sandilya, P.Natural gas is an environment-friendly fuel and a raw material for many chemicals. Its offshore transport is economical when the gas is transported in liquefied form as Liquefied Natural Gas (LNG) over distances (exceeding 2000 kilometers) by sea. LNG is stored at near-atmospheric pressure and about 112 K in these tanks. Heat inleak from the ambient into the stored LNG causes considerable boil-off of the LNG due to low latent heat of vaporization of LNG. Boil off Gas (BoG) generation should be reduced to minimize the loss of LNG as well as environmental pollution. Determination of the boil-off rate (BoR) poses a challenge because it involves interplay of multitude of phenomena and considerations, like liquid sloshing that is likely to generate heat and increases the interfacial area between the liquid and the ullage, variation in LNG composition due to BoG generation, and thermal stratification. In this paper we present a numerical analysis of the BoG generation, including some of the effects just mentioned. A model including transport phenomena based-equations and thermodynamic phase relations has been developed for this purpose.The simulation results would help in carrying out more in depth study of BoG generation that is useful in the design and operation of the prismatic membrane tanks.Item Sensorless field oriented control of AC induction motor using PI, PD & PID controllers(IEEE, 2022-11-20) Antony, Nikhil John; Mishra, Deepak; Parveen, ShabnamWith the Field-Oriented Control (FOC) vector approach, the control of the induction motor behaves similar to that of a separately excited dc motor. The torque and flux components in the d-q rotating reference frame can be independently controlled with the help of unit vectors. The main focus of the present work is to show the effective utilization and feasibility of field-oriented control of AC induction motors using PI, PD, and PID controllers without using any physical sensors and using observers. The speed, torque, and position in this scheme are estimated, analyzed, and simulated with the help of a motor control block-set in MATLAB/Simulink for a (10HP, squirrel cage induction motor) to a VSI using the SVPWM for effective modulation.Item Performance evaluation : anti-windup two-loop PID controller for rotary single inverted pendulum(IEEE, 2021-11-11) Pandey, Sandeep; Dwivedi, Prakash; Mishra, DeepakIn this paper, two loop Anti-windup PID controller is designed for Set-point tracking of Rotating arm and balancing vertical position of Pendulum of Rotary Single Inverted Pendulum. Controller ((feedback)) gains are obtained via pole placement and tuned by using the LQR technique. Comparative analysis of observer based pole placement controller, LQR and two-loop Anti-windup PID controller are experimentally illustrated. Steady-state error persists during the operation of two loop PD controller. In order to reduce this steady state error, integral term is added in controller. Due to violation of voltage constraints, an undesirable phenomena known as integral windup occurs. To overcome integral windup, Anti-windup technique (conditional integration) is used with two loop PID controller. Experimental result shows that proposed two loop Anti-windup PID controller gives better set-point tracking and a minimum steady-state error as compared to other controllers.Item A fast and effective method for assessing insulation condition based on time domain spectroscopy data(IEEE, 2022-01-21) Mishra, Deepak; Pandey, Sandeep; Baral, ArijitA novel methodology is suggested to predict the condition of Oil-paper Insulation (OPI), popularly used in power transformers. The proposed method is based on transient measurement of polarization current data from laboratory samples. Initially, complete polarization current profile is used to formulate an insulation model and then find the rise time of the system. After that, a relation is provided between rise time and measured performance parameters like moisture content(%pm). Further, another relation is suggested between rise time and the initial decay rate of recorded data. Hence, just by knowing the value of the initial decay rate, the value of crucial parameters like %pm can be evaluated using the proposed relationship.Item A method to predict degree of polymerization value of oil-paper insulation using interfacial charge(IEEE, 2029-12-20) Singh, Vijeta; Mishra, Deepak; Baral, Arijit; Chakravorti, SivajiAnalysis based on Degree of Polymerization (DP) value is assumed to provide reliable regarding insulation condition. However, due to the invasive nature of testing, DP value based-analysis is not feasible in practical cases as it requires a paper sample from the in-service unit. Here, an attempt is made to develop a methodology to predict DP value based on non-invasive testing of oil-paper insulation. In this paper, it is found that DP value maintains a well-known relation with interfacial charge (estimated using Polarization Depolarization Current data) as both these parameters are related to the cellulosic condition. The proposed method successfully applied on various laboratory prepared samples containing different moisture content.Item Is outsourcing the Panacea? a discourse on the sustainability of Indian ports a case of Jawaharlal Nehru port trust(International Association of Maritime Universities, Alexandria, Egypt, 2021-10-27) Mitra, T; Pattanaik, K. M.The discourse on sustainable transportation illuminates the fact that port competitiveness and efficiency gains are two major pillars of blue economy in a world which is much integrated than in the past. However, most literature on port efficiency measurement undermine the very eco system of a port. Port eco system is complex interconnected web of network which requires collaborative involvement of spate of stakeholders such as CFS, Agents, ICDs, Transportation companies, to mention a few. Understanding such network and their holistic potential impact on the efficiency of port performance is scarcely addressed in the context of larger dialogue on port efficiency. Such an analysis is paramount when deeper levels of economic integration and spatially competitive ports are considered to be co joint twins. Further, efficiency gains of ports have received much academic attention in view of total quality management which focuses on customer delight and thus customer retention. It is this regard; the present paper tries to make an infant endeavour in terms of measuring terminal efficiency with respect to the turnaround time which would include export cycle time and import cycle time of CFS (a potential outsourcing activity of a port). Such a step in efficiency measurement of ports is scanty in Indian scenario. A case of Jawaharlal Nehru Port Trust is referred as a case in point.