Global Research Society Publisher

GRS Journal of Multidisciplinary Research and Studies

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1. Design and Fabrication of a Prototype Mobile Offshore Charging Ship (M...
11

Saravanan Venkadasalam
Singapore Maritime Academy, Singapore Polytechnic, Dover, Singapore.
01-10
https://doi.org/10.5281/zenodo.18266603

In line with the International Maritime Organization's (IMO) ambitious target of achieving net zero greenhouse gas emissions by 2050, this paper proposes a novel Mobile Offshore Charging Ship (MOCS) to address the limited operational range of electric vessels. The paper details the design and fabrication of a prototype MOCS, incorporating solar power generation, logic controllers, and 3D-printed components. While testing confirmed the prototype's functionality and potential for practical deployment, limitations in scalability were identified due to current battery technology and wireless power transfer constraints. The discussion emphasizes the need for further advancements in energy storage, autonomous operation, and dynamic environmental modelling to enable larger-scale MOCS implementation. This research establishes a proof-of-concept for MOCSs and highlights their potential to significantly contribute to sustainable maritime decarbonization efforts.

2. Laminar Convection flow in Warm Bathing Water: An In-depth Review with...
11

Alabodite Meipre George* & Bir...
Department of Mathematics, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria
11-18
https://doi.org/10.5281/zenodo.18427978

Laminar free convection flow in warm bathing water had just been investigated numerically for a range of Reynolds number 0 ≤ Re ≤ 110 keeping Fr = 2.5 and Pr = 9.5 fixed throughout the study. The result showed that cabbeling changes slightly with Re owing to the increasing Re, even though, the velocity in such free convection flows are usually small. The result showed that volume of hot water at the upper section at some point in time depleted completely and in turn induces the entire ambient water temperature which later became the same temperature everywhere without any external influence. These results require just a little mixing for temperature between 0◦C and 10◦C to attain Tm. The time taken for dense fluid to sink to the bed for smaller Re is slightly longer as compared to the time it takes as Re increases. Temperature profiles were also analysed at some points (X, 69; 30; 10) below the contact layer and plotted against the x-coordinate. In a similar manner, profiles of x-component and y-component velocities were also determined at (X, 69) for the various Re cases as considered and plotted against the x-coordinate. Fluctuations in the temperature profiles describes the convection precess as both hot and cold fluid mixes in all direction and continue to deplete further. Meanwhile, fluctuations in the curves for the y-component velocity profile indicates that even as the dense fluid continue to descend, fluid that is still positively buoyant moves upwards. The maximum time taken for descending dense fluid to reach domain floor and the time taken to attain that depth were also considered. From the empirically determined data set, we could identify a single regime of Re-dependence and shown by the straight line in Figs. 7, which represent best fit power law obtained by linear regression of logRe on logτn (see equation ).

3. Green human resource planning and organizational performance of plasti...
6

Ethelmary Ogochukwu Dim, John...
Department of Business Administration, Faculty of Management Sciences, Chukwuemeka Odumegwu Ojukwu University, Igbariam Campus, Anambra, Nigeria
19-26
https://doi.org/10.5281/zenodo.18428009

The study investigated the green human resource planning and organizational performance of plastic manufacturing firms in South-East, Nigeria. Specifically, the study has two objectives and two hypotheses. Relevant conceptual, theoretical and empirical literature were reviewed taking into cognizance problem and the hypotheses of the study. Anchored on Resource-Based Theory, this descriptive study conducted in South-East, Nigeria, utilized data from primary and secondary sources to study a population of 1929 employees from Plastic Manufacturing Firms. A sample size of 371 was determined using the Borg and Gall formula, and data was collected via a questionnaire whose validity was ensured through face and content validity, and whose reliability was established using the test-retest method and Cronbach's Alpha, prior to testing the hypotheses with Linear Regression Analysis. Green training and development had a positive significant effect on operational performance of plastic manufacturing firms (β =.243, t = 4.699, p=0.000<0.05). Green culture practices had a positive significant effect on environmental performance of plastic manufacturing firms. (β .164, t = 4.163, p=0.001<0.05) and green recruitment had a positive significant effect on product performance of plastic manufacturing firms in South-East, Nigeria. ( β=.178, t = -3.120,p=0.000<0.05. The study concluded that green human resources planning had a positive significant effect on organizational performance of plastic manufacturing firms in South-East, Nigeria. Plastic firms must adopt green training, focusing on emission control to enhance sustainability and operational performance. A strong pro-environmental culture is essential for success.





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