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 Outsourcing of logistics and global competitiveness –A case study on Jawaharlal Nehru Port Trust(Indian Maritime University and Academy of Maritime Education and Training, Chennai, 2019) Mitra, Toorban & Pattanaik, Krushna MohanWith the emergence of global competitiveness in port sector, it is imperative that a port is not just operational but also effective in its service provision. Logistics performance, ceteris peribus, stimulates this effectiveness of a port significantly in terms of its performance. In this context it is illuminated that outsourcing of logistic activities and competitiveness of a port are co-habitants. In view of the present background set, the present study makes an intervention to explore performance of various outsourced stakeholders involved in logistic service provision for Jawharlal Nehru Port Trust (JNPT) which may include service provision of various Container Freight Stations (CFS), Inland Container Depots (ICD) and Logistic Operators under JNPT. Using secondary data collected from various stake holders to establish standard port operation indicators, this paper makes an endeavor to measure the comparative performance of each of these stakeholders which in turn would facilitate their respective macro operational impact on the effectiveness of JNPT to face growing global competitiveness in the coming times. As a follow up, strategic options are suggested for improvement and retention of competitive performance of outsourced stakeholders involved in logistics service provisions in JNPT’s operations.Item Holistic approach to project CWC with altair(Altair Technology Conference, 2015-07) Bhavaraju, Pradeep J. S.A Circulating Water Channel (CWC) generates a controlled flow environment and is used for various hydrodynamic research activities including flow around ships, study of fishnets, etc. The current paper utilizes various modules of ALTAIR HYPERWORKS to provide a holistic solution in completing the project i.e, modelling using SOLIDTHINKING, flow analysis across the working section of the CWC using ACUSOLVE, and developing a mechanism to generate ship motions with MOTIONSOLVE. One of the many experiments that can be conducted with the CWC is an internal tank sloshing test. A free surface flow analysis is performed for a 2D tank using RADIOSS solver validating the same with existing experimental results.Item Analysis of antifouling paints using drum test apparatus(RINA, 2015-12) Joshi, Madhu; Mukherjee, A.; Misra, S. C.; Ramesh, U. S.Ship has been recognized as a major factor in introduction of non-native and harmful organisms which causes deleterious effects on the performance of the vessel. More than 70% of Invasive species worldwide have found to be due to hull fouling. To mitigate fouling, underwater parts of the vessels are coated with antifouling paints. Antifouling paints provide foul-free hulls up to a maximum of 95 % of the vessels underwater area. There are a number of types of these paints but “self-polishing coatings” are predominantly preferred by the shipping industry. In these types of coatings, a thin layer of biocide containing paint (typically 2 to 5 microns/month) is leached or “polished” away. This polishing action primarily depends on the hydrodynamic surface forces on the vessels hull. The higher the fluid velocity, the higher are the polishing rate. Certain areas of the vessel such as near the bow, stern, etc experience higher fluid velocity and therefore higher polishing rates thereby resulting in premature fouling. Conversely, areas where the flow rates are considerably smaller would experience lesser polishing rates which would result in insufficient amount of biocides being delivered which would again result in premature fouling. In order to study and estimate the polishing rates of Anti Fouling paint we have designed, fabricated a rotating drum test facility .Wall shear stress are to be calculated by CFD methodsItem Some statistical relationships among dredger particulars observed in the indian dredging fleet(International Conference on Ship and Offshore Structures, 2015-12) Arun Kishore, Eswara; Ramesh, U. S."Cutter suction dredgers(CSD), Trailing suction hopper dredgers (TSHD) and Grab dredgers form 88% of the total Indian fleet size, respectively in the order of individual share. Indian yards have achieved 90% indigenization in design and construction of grab hopper dredgers. However, there is a techno-economic backlog in India to manufacture some vital components for CSDs and TSHDs and companies are increasingly looking to buy foreign made dredgers at a high price. Dredging demand in India at ports and in navigable inland water ways is set to grow with the encouragement for water transport. Ministry of Shipping, Govt. of India has sponsored studies at Indian Maritime University – Visakhapatnam (formerly, NSDRC) for indigenization of dredger design and manufacture. The present paper aims to illustrate the existing dredger fleet of India and bring out some interesting correlations or conclusions that aid the design of dredgers. Dredgers are built for a specific function. Due to this design objective, they differ from other marine vessels on the aspects of principle particulars, hopper capacities, powering and other functional data such as cutter power for CSD and dredge pumps power etc. The identified correlations among a few parameters observed from the Indian dredging fleet are discussed. Certain ratios among the main dimensions for a TSHD such as length/breadth, breadth/dredge depth and breadth/draught, also known as ship ratios, are a key to dredger design and are known to vary with market conditions or time. They indicate design trends for future dredgers and require to be kept updated. "Item Energy saving strategy on electric propulsion system integrated with doubly fed asynchronous motors(IEEE, 2016-11) Singh, Raja R.; Chelliah, Thanga Raj; Khare, Deepak; Ramesh, U. S.Electric propulsion system integrated with doubly-fed asynchronous motor contributes efficient characteristics and flexibility in operation. However, in perception of energy saving and full-scale speed variation, the conventional doubly fed asynchronous motor is limited by the ratings of power converters. Generally, the electrical machines are designed to attain maximum efficiency around the full load. To increase energy saving and operating speed range under lightly loaded condition, the proposed strategy injects a low voltage DC supply to the stator winding instead of full rated AC supply. Wherein the DC supply is obtained from the converter's DC-link instead of external source. The proposed system is mathematically modelled using Matlab/Simulink tool and implemented experimentally with a 2.2 kW doubly fed asynchronous motor. In addition to this, the comparative energy conservation analysis of an electric propulsion system (2 MW) with the proposed strategy is carried out as a case study.Item Control strategy for fuel saving in asynchronous generator driven electric tugboats(IEEE, 2016-12) Anil Kumar, B.; Anil Kumar, K.; Radha, T.; Chelliah, Thanga Raj; Khare, Deepak; Ramesh, U. S.Usually electric tugboats are equipped with diesel engine based electric generator for power production, battery for supplying power to auxiliary loads and electric motors for propulsion. This paper proposes control strategies for diesel engine and electric generators used in electric tugboat to improve energy efficiency of the system. Doubly fed induction machine (DFIM), asynchronous in nature, is considered in this research which serves as generator (power production). The speed of diesel engine is controlled in accordance with the power demanded by the tug. Output voltage and frequency of generator during sub-synchronous operation are regulated by controlling its rotor current with the help of power electronic convertors. Comparison of fuel consumption at fixed and variable speeds of operation is performed. From the test results, it is observed that the variable speed operation of diesel generator offers significant reduction in fuel consumption.Item The prostects of dredging and indigenization of dredger design(Dredge Yard, 2015-06) Arun Kishore, Eswara; Ramesh, U. S.The scope for dredging in India is potentially vast, looking at the prospects of development and maintenance of existing major ports, building new ports, o_shore resources exploration, demand from navy and more interestingly the projects envisaged for national waterways. The capital dredging demand during 2012-2017 is about 639 million m3 and that of maintenance dredging during the same period is about 521 million m3. This requires the employment of substantial number of dredgers of varying capacities. The minor sector dredging demand of about 100 million m3, during the said period, oers additional opportunity for dredging. The modal shift of cargo to inland and coastal waterways o_ers bright prospects for a sustainable economic prosperity. The government encouragement for \Make in India" has brought in a lot of economic interest as well. This is an excellent period to target for indigenization of dredger manufacture. Locally manufactured dredgers not only reduce costs of dredging but also encourage business climate. Further, it will enable India to produce globally competitive world class dredgers. The present paper is written in this context of presenting our study encompassing the scope for dredging activity, identifying suitable types and capacities of dredgers for employment in India. The paper also touches upon the present shipbuilding infrastructure, dredger equipment manufacturers and a road map for indigenization. The paper concludes with forecasting future dredging demands, scope for native dredgers manufacture, identifying a particular target range for indigenization.Item Cost assessment and tariff determination : cargo handling experiences at a private port(5 Case Centre, 2015) Bhanu Prakash, Nookala; Dhingra, Tarun; Bangar Raju, T.; Ramalingeswara Rao, B. V.(This case is written based on personal observations, interactions, and information collected from authorities of a private port in Gujarat and is purely for academic discussions to suit post graduate students. Taking this objective as cue and as per suggestions of authorities, financial figures are tweaked and name of the port is not disclosed.) Assessment of costs involved in handling a ship holds key for calculating tariff to be levied for services provided to client. A port provides numerous services to a ship that visits for loading and/or unloading of cargo and in the process incurs numerous costs. Precision in identifying costs incurred while providing services and charging clients accordingly help in maintaining confidence of clients and profits for port. The present case deals with cargo handling process of a private port and costs determination for such services. A port attempts to provide reliable and speedy services at competitive prices for its clients so as to maintain client satisfaction and business. Ports in competitive market environment are investing huge amount of funds on infrastructural setup only to reduce stay time of both ship and cargo at the port. Modern ports, often, maintain alternative mechanism to handle the cargo that they handle. This Case Study is based on the observations, interactions and subsequent data collection from a private port in Gujarat on west coast of India and covers assessment of costs involved in handling a ship arriving with coal that the port is to handle for one of its clients. A port also provides certain additional services as desired by client for further charges. A decision on identifying a cost-effective alternative with ease of handling from among two modes of cargo handling process is to be made by the students. The case is well suited for students with ability to understand process costing concepts.