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  UM Refereed Academic Journals
The Association for Engineering Education In Southeast Asia, East Asia and the Pacific AEESEAP)-Activities
Nasrudin Abdul Rahim, Suhana Mohd Said, Noorima Mokhtar

The Association for Engineering Education in Southeast Asia, East Asia and the Pacific was established with the aim to improve the education of engineers and technologists in its member countries. This paper will give an overview of AEESEAP objectives and its current activities, coordinated by the current secretariat based in Malaysia. The main issue being dealt with throughout the existence of AEESEAP is the issue of sustainability of the association. This paper will highlight the objectives and current activities of AEESEAP in Malaysia, with regards to sustaining this association.

Keyword: AEESEAP Objectives, AEESEAP Activities

Full Paper: 556.pdf

Introduction of Graduate Capabilities Through ?Teamworker? and Extended Project in Infomechatronics
R. Mahalinga Iyer

Accreditation of engineering courses requires the incorporation of not only technical content but also generic capabilities development in the course structure. Among the many requirements are: ? Ability to communicate effectively, with engineering teams and the community at large ? Ability to function effectively as an individual and in multi-disciplinary teams, as a team leader as well as an effective team member. Queensland University of Technology (QUT) is committed to the integration of generic capabilities with the technical content. QUT has listed seven graduate capabilities to be incorporated in every course. Communication and collaborative working are among these seven graduate capabilities. The infomechatronics course is an engineering program integrating mechanical, electrical and information technology. This course is an Engineers Australia accredited course. There are several subjects that specifically include graduate capabilities within the course. One of the subjects that include team work and communication skills is Mechatronics Systems Design. This unit uses extended laboratory work as a means to facilitate team work and communication skills. This paper outlines the structure of this subject and the use of ?TeamWorker?, a web based facility developed at QUT, in developing team work and communication skills with students? response in this development.

Keyword: Graduate capabilities, teamwork, communication skills.

Full Paper: 557.pdf

A Study of Effects of MQL on Tool Wear, Job Dimension and Finish in Turning AISI-1040 Steel
N. R. Dhar, M.w. Islam

The growing demands for high productivity of machining need use of high cutting velocity and feed rate. Such machining inherently produces high cutting temperature, which not only reduces tool life but also impairs the product quality. Metal cutting fluids changes the performance of machining operations because of their lubrication, cooling, and chip flushing functions but the use of cutting fluid has become more problematic in terms of both employee health and environmental pollution. Because of them some alternatives have been sought to minimize or even avoid the use of cutting fluid in machining operations. Some of these alternatives are dry machining and machining with minimum quantity of lubrication (MQL). This paper deals with experimental investigation on the role of MQL on cutting temperature, tool wear, surface finish and dimensional deviation in turning of AISI-1040 steel at industrial speed-feed combinations by uncoated carbide insert. The encouraging results include significant reduction in cutting temperature, tool wears and dimensional inaccuracy by MQL mainly through favorable chip-tool and work-tool interaction.

Keyword: MQL, Cutting temperature, Tool wear and Dimensional deviation

Full Paper: 558.pdf

The Effect of Temperature on the Adsorption of 4-Nitrophenol onto Palm Shell based Activated Carbon
Norzilah Abdul Halif, Wan Mohd Ashri Wan Daud, Iskandar Mohd Noor, Che Rosmani Che Hassan

A series of experiments was conducted to study the adsorption of 4-NP onto Palm Shell based Activated Carbon (PSAC) and the results obtained were compared to two commercial products, one is Coal based Activated Carbon (CBAC) and another is Coconut Shell based Activated Carbon (CSAC). The experiments were carried out in batch mode with the temperatures of the operation were varied from 25 to 40?C and the 4-NP concentrations were varied from 500 to 2000 mg/L. The Langmuir and Freundlich isotherms were found to represent the measured adsorption data well ( 0.90)2R > . The results show that in all cases, increasing the temperature from 25 to 40?C, the affinity decreases and CSAC has the lowest (26.13%), followed by CBAC (46.13%) and then PSAC (50.30%). Similar trends also found in the adsorption intensity, where CSAC was the lowest (11.12%), followed by PSAC (21.66%) and CBAC the highest (27.94%). The findings of this investigation suggest that PSAC can be used as an effective adsorbent for the removal of 4-NP from wastewater.

Keyword: Adsorption, 4-nitrophenol, palm shell based activated carbon, Freundlich

Full Paper: 559.pdf

A Study on Learning Strategies of Second Year Engineering Students at the Universiti Kebangsaan Malaysia
Khamisah J, Firdaus M H, Nik Rusdi Y, Ruhizan M Y

In the Faculty of Engineering at the Universiti Kebangsaan Malaysia, students are required to take four basic mathematics subjects before they can continue to their respective engineering courses. Of these four courses, students have identified that Linear Algebra and Vector Calculus to be the most difficult course. Studies on student?s performance for this course also support this claim. The vast mathematical concepts and theories covered in this course as well as thorough familiarity with single variable calculus and college algebra may be the factors leading to this perception. The aim of this study is to identify the learning strategies practiced by second year engineering students in the academic session of 2003/2004 who has taken all four mathematics courses. Students are divided according to their achievement in the Linear Algebra and Vector Calculus course into three categories identified as High Achievers, Moderate Achievers and Poor Achievers. Learning strategies was measured quantitatively using an inventory consisting of 30 questions covering six learning strategy scales. The results suggest four main learning strategies practiced by the students: (a) achievement motivated, (b) memorisation, (c) global approach, (d) construction of meaning. Analysis of variance test showed there is significant difference for the memorisation strategy of students across the categories of achievement.

Keyword: learning strategies, categories of achievement, engineering students

Full Paper: 560.pdf

Air Conditioning and Water Heating-An Environmental Friendly and Cost Effective Way of Waste Heat Recovery
M. M. Rahman, Chin Wai Meng, Adrian Ng

Nowadays, besides the air conditioning unit, another comfort providing equipment that can be found in many homes in Malaysia is the instant water heater system which is often used in the morning when both the weather and water temperature are low. However, the instant water heater consumes a considerable amount of electricity and users have to pay for it. There is still a possibility to obtain hot water without using any extra electric power if the air conditioning and water heating systems are integrated. Therefore, this paper presents the research on the establishment of waste heat recovery device from split air conditioning system. So far, two types of research activities have been conducted to recover waste heat from split type air conditioning systems. For the first type of research the condenser of the air conditioning unit is replaced by the copper tube, which is submerged in a water tank to warm up the water to be used for domestic purposes. The results showed that the temperature of the water in the heating tank can be raised from 25?C to 42?C and at the same time, the temperature of the evaporator can be lowered down from 27?C to 18?C within 7 minutes. In order to avoid the possible contamination of water with the refrigerant, which may be harmful for human health, the second type of waste heat recovery device from split air conditioning was initiated. In this case, the heating tank is designed in a way that the copper tube conveying refrigerant is not submerged in water. The heating tank consists of two cylindrical chambers, the inner chamber, which is filled with water, is coiled with the hot refrigerant conveying tube at the outer surface. The annulus of inner chamber and outer chamber is filled with insulating materials to avoid heat loss. This device may increase the water temperature from 30?C to 75?C within 8 hours of operation. By using these type of heat recovery devices, compressor efficiency can be improved and at the same time, warm water for domestic purposes can continuously be obtained free of charge. The end result is faster cooling and prolonged compressor life. This system is simple and not costly and able to save the water heating cost and at the same time, safe in environmental aspects, i.e., less heat is rejected to the environment.

Keyword: Waste heat recovery, air conditioning, warm water, and environmental friendly.

Full Paper: 561.pdf

A Proposed Motivation Programme for Underachieving Students at the Faculty of Engineering, University of Malaya
Siti Fatimah Siraj, N. Md. Ali, Wan Nor. Liza Wan Mahadi, Norhayati Soin, Siti Zawiah Md Dawal

This paper proposes a motivation programme in arresting the problems of low achievement of some students in the engineering faculty, University of Malaya, Malaysia. Even though the majority of students come up with above average performance, the occurrence of students failing to perform well has caused a lot of concern among the teaching staff. Some major factors have been investigated and through years of monitoring samples of students who came up and seek advice from the authors, it was found that through this programme, the student?s academic performances improved tremendously. It is then agreed that the motivation programme may just be the best solution in upgrading the student?s academic abilities. This paper attempts at drawing out a proper motivation programme which will be effective in addressing the problems of underachieving students.

Keyword: motivation

Full Paper: 562.pdf

Copyright 2008 University of Malaya.