Development of an Optimization Framework for the Design of High Speed Planing Craft

High speed planing craft play key roles in supporting several critical maritime activities, e.g., coastal surveillance, reconnaissance, life-saving operations, passenger and high value cargo transport. Despite their significant use, formal optimization frameworks have rarely been proposed to deal with their design challenges. In this thesis, an optimization framework for the preliminary design of high speed planing craft is presented. Several case studies of single- and multi-objective formulations of high speed planing craft design problem are solved using state-of-the-art optimization algorithms. The notion of scenario-based design optimization and innovization, i.e. a means to uncover design relations are also discussed. A modular, extensible design optimization framework that allows the analysis tools to be extended or replaced with the desired level of complexity or with the state-of-the-art analysis tools is proposed in this thesis. A validated 3D mathematical model of high speed planing craft hull form has been identified in this thesis. The use of global parametric transformation that preserves surface fairness and allows for the presence of curve discontinuities is incorporated. A suite of three state-of-the-art optimization algorithms, namely NSGA-II, IDEA and SA-EA is incorporated within the framework. The performances of the algorithms are compared using the case studies. Solutions to single-objective minimization of calm water resistance, resistance in a seaway and multi-objective formulations considering minimization of total resistance, vertical impact acceleration and steady turning diameter have been presented. The capability of the framework to capture design trade-offs is illustrated. The case studies are extended to provide for scenario-based design optimization in order to demonstrate the capability of the framework to solve optimization problems based on the ship's operational profile and operating conditions. A concept of innovization, which allows for the automatic discovery of design rules governing optimum hull forms, is introduced. The relationship gathered through the process of innovization is applied as a cheap pseudo-performance indicator within an optimization formulation, where the results compare favourably with the empirical estimate obtained from experimental data. Such extensions are new contributions to the ship design discipline, in which opens up the possibility of the development of optimum design rules for any particular ship class

Training for Processing Plastic Waste into Oil Fuel

This service aims to provide education to elements of the community in Padamulya Village, Cihaurbeti District, Ciamis Regency. Next, we introduce to the public about plastic waste that can be used as fuel oil. The target of this activity is the community of one Padamulya, Cihaurbeti District, Ciamis Regency. This activity was attended by all regional leaders and the community. The expected result is that plastic waste produced by households can be used as fuel oil and reduce plastic waste in Padamulya village. Furthermore, training activities are carried out regularly so as to make the village healthy and economically independent

Smartphone-based Robot Design Training with Voice Control for Senior High School in Tasikmalaya City

The main objective of this work is to provide training to build smart phone-based smart robots with voice control to teachers at Senior High Schools, Tasikmalaya City, Indonesia. This robot consists of various electronic components such as Arduino, IC L293D, Bluetooth Module HC05, dynamo, gear box and battery. In addition, we have used several software to build intelligent robots such as Arduino software for uploading a command and AMR voice application for controlling via voice commands. The results showed that the teachers had succeeded in making robots with voice control for forward and backward commands with the help of the AMR voice application. In addition, the results of this training are expected to increase the creativity of teachers in the learning process and as teaching materials to create an active and collaborative class

Modeling Net Power of Sabah Trough and Its Effectiveness

The prospect of ocean thermal energy conversion (OTEC) system in Malaysia was realized in 2008 by survey carried out in South China sea. Since then various stake holders were sensitize about numerous benefit of renewable energy. The author used the temperature/ depth profile obtained during that survey in 2008 to calculate the net power for Sabah trough using Lockheed Martin proposed model for estimation of OTEC potential worldwide.  Their Model developed comprises critical assumptions and account for major contributing and loss factors to electrical power system. The MATLAB was used for the study;the net power obtained was 133.8162MWe. Keywords: renewable energy, ocean thermal energy conversion, closed cycle system and net powe

Identifying the Shipyard Waste: An Application of the Lean Manufacturing Approach

Shipyard is a specialised facility equipped with various tools to support the process of building, repairing and maintaining ships. There are several types of variant ships, such as military ships, tourist boats, cargo ships and passenger ships. Apart from being a place for shipbuilding, shipyards are utilised to conduct several activities, such as ship design, equipment installation, plate installation, feasibility tests and classifications. There are many production activities and flows that allow for potential waste problems that impact labour usage, product quality, costs, and production time. This research aims to identify waste in shipbuilding production lines through a lean manufacturing approach. The lean manufacturing approach is one of the ways in shipyards to observe the level of waste in the production process to reduce unnecessary activities in the production process, which can increase production efficiency and effectiveness. This study approach begins with identifying waste in the production line through mapping on each line so that activities with no added value are identified. On the basis of the results of identification using the waste assessment model (WAM) method, which consists of a waste relationship matrix (WRM) and a waste assessment questionnaire (WAQ), waste is obtained, namely inventory (27,20%), overproduction (20.24%), defective products (20.04%), motion (12.47%), transportation (9.23%), waiting time (7.46%) and process (3.37%

Identifying the Shipyard Waste: An Application of the Lean Manufacturing Approach

Shipyard is a specialised facility equipped with various tools to support the process of building, repairing and maintaining ships. There are several types of variant ships, such as military ships, tourist boats, cargo ships and passenger ships. Apart from being a place for shipbuilding, shipyards are utilised to conduct several activities, such as ship design, equipment installation, plate installation, feasibility tests and classifications. There are many production activities and flows that allow for potential waste problems that impact labour usage, product quality, costs, and production time. This research aims to identify waste in shipbuilding production lines through a lean manufacturing approach. The lean manufacturing approach is one of the ways in shipyards to observe the level of waste in the production process to reduce unnecessary activities in the production process, which can increase production efficiency and effectiveness. This study approach begins with identifying waste in the production line through mapping on each line so that activities with no added value are identified. On the basis of the results of identification using the waste assessment model (WAM) method, which consists of a waste relationship matrix (WRM) and a waste assessment questionnaire (WAQ), waste is obtained, namely inventory (27,20%), overproduction (20.24%), defective products (20.04%), motion (12.47%), transportation (9.23%), waiting time (7.46%) and process (3.37%

Investigating the Ergonomic Work Posture on Traditional Fishing Boats Manufacturing in Lhokseumawe City, Aceh Province, Indonesia

The Sailing ships in Aceh are usually conventional; this shipbuilder usually requires 3 people. Sailing ships in Aceh are usually made conventionally. Shipbuilders need 3 workers. Construction time for ships weighing 1 to 3 gross tons (GT) takes 1 - 2 months. Strategies and improvements in shipbuilding methods have been well-studied in the shipbuilding literature. The location and process of making the ship are in the Banda Sakti sub-district, Lhokseumawe City. It has multiple workstations, such as measuring and cutting stations and assembly stations. Operators must work 8 hours daily in various postures, including standing, bending, and lifting heavy objects. On the basis of the preamble of the Nordic Body Map (NBM), intense exercise damages the musculoskeletal system by comparing the Rapid Upper Limb Assessment and Rapid Entire Body Assessment for workers' assessment of their working posture. In the process of making fishing boats. Results of REBA Labor Calculation: Worker 1 gets a score of 9, Worker 2 gets a score of 11, and Worker 3 gets a score of 5. In RULA, Workers 1 and 2 get the same score of 6, and Worker 3 gets the same score of one score out of 4. REBA received a final score of 2 at low-risk level 1, and REBA 2 workers received a final score of 2 at level 1, low-risk, and performance level 1. Working conditions at lifting stations must be improved to prevent musculoskeletal system diseases in the timber lifting station employees

Investigating the Ergonomic Work Posture on Traditional Fishing Boats Manufacturing in Lhokseumawe City, Aceh Province, Indonesia

The Sailing ships in Aceh are usually conventional; this shipbuilder usually requires 3 people. Sailing ships in Aceh are usually made conventionally. Shipbuilders need 3 workers. Construction time for ships weighing 1 to 3 gross tons (GT) takes 1 - 2 months. Strategies and improvements in shipbuilding methods have been well-studied in the shipbuilding literature. The location and process of making the ship are in the Banda Sakti sub-district, Lhokseumawe City. It has multiple workstations, such as measuring and cutting stations and assembly stations. Operators must work 8 hours daily in various postures, including standing, bending, and lifting heavy objects. On the basis of the preamble of the Nordic Body Map (NBM), intense exercise damages the musculoskeletal system by comparing the Rapid Upper Limb Assessment and Rapid Entire Body Assessment for workers' assessment of their working posture. In the process of making fishing boats. Results of REBA Labor Calculation: Worker 1 gets a score of 9, Worker 2 gets a score of 11, and Worker 3 gets a score of 5. In RULA, Workers 1 and 2 get the same score of 6, and Worker 3 gets the same score of one score out of 4. REBA received a final score of 2 at low-risk level 1, and REBA 2 workers received a final score of 2 at level 1, low-risk, and performance level 1. Working conditions at lifting stations must be improved to prevent musculoskeletal system diseases in the timber lifting station employees

Adaptive Initial Contour and Partly-Normalization Algorithm for Iris Segmentation of Blurry Iris Images

Iris segmentation is a process to isolate the accurate iris region from the eye image for iris recognition. Iris segmentation on non-ideal and noisy iris images is accurate with active contour. Nevertheless, it is currently unclear on how active contour responds to blurry iris images or motion blur, which presents a significant obstacle in iris segmentation. Investigation on blurry iris images, especially on the initial contour position, is rarely published and must be clarified. Moreover, evolution or convergence speed remains a significant challenge for active contour as it segments the precise iris boundary. Therefore, this study carried out experiments to achieve an efficient iris segmentation algorithm in terms of accuracy and fast execution, according to the aforementioned concerns. In addition, initial contour was explored to clarify its position. In order to accomplish these goals, the Wiener filter and morphological closing were used for preprocessing and reflection removal. Next, the adaptive initial contour (AIC), δ, and stopping function were integrated to create the adaptive Chan-Vese active contour (ACVAC) algorithm. Finally, the partly -normalization method for normalization and feature extraction was designed by selecting the most prominent iris features. The findings revealed that the algorithm outperformed the other active contour-based approaches in computational time and segmentation accuracy. It proved that in blurry iris images, the accurate initial contour position could be established. This algorithm is significant to solve inaccurate segmentation on blurry iris images

Performance evaluation of hydraulic field test rig

Development of environmental friendly hydraulic fluid has a major influence on ecologically benign environment. This future type of oil should be non-toxic, biodegradable and ecological benign. Subsequently, it becomes crucial to recognize the sustainability of such oil in maintaining a high system performance which resulting in tremendous contribution towards machinery technology. Furthermore, the development of methods to evaluate the actual performance of hydraulic fluid has been of great interest. In this project a hydraulic test rig was built to conduct endurance test where it can be operated continuously with several safety features. The rig was used to test the oil and other stringent parameters, running for nearly 1000 hours. Major factors in the decrease of mechanical efficiency are thermal heat, friction, aging behaviour and contamination of the plant oil. Explained in this paper are the features of the hydraulic system built to evaluate the performance of plant oils