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ABSTRACTS |
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Brunei Darussalam Journal of Technology
and Commerce
Volume 4 - No.1, January 2006 |
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1. |
Institut Teknologi
Brunei; Twenty Years of Excellence in Technical Education
Dr Hjh Naemah binti Hj Basir
Institut Teknologi Brunei
Abstract
Institut Teknologi Brunei
was established in 1986. Its inception took place one year after the
inauguration of Universiti Brunei Darussalam. Whilst Universiti Brunei
Darussalam offered courses at degree level in wide general areas of
study, Institute Teknologi Brunei (ITB) specialized in the business,
engineering and technological fields at Higher National Diploma or
advanced technician level. The intention was to train highly motivated
technicians in certain fields so as to fulfill the ever increasing
national technological needs. ITB began by offering three different
Higher National Diploma level (HND) programmes chosen to fulfill the
immediate needs of both government and private sectors. These programmes
were in Computer Studies, Electrical Engineering, and Business and
Finance. ITB was successful in obtaining accreditation by BTEC (British
Technical Education Council) for all of these courses thereby ensuring
their international recognition. |
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2. |
Porous Media
Utilizations in Energy Systems
Professor A. A. Mohammad
University of Calgary, Canada
Abstract
Porous media is used
extensively in chemical engineering to enhance the rate of mass transfer
and mixing process because the porous matrix has extensive surface area
per unit volume, order of 104-105 m-1.
For instance, glass beads are used in many reactors and mass transfer
columns. Good examples of mass transfer through porous media are our
lungs, food mass exchange between blood and different body organs,
evaporation from body skin, etc. Porous media can be used to enhance the
thermal efficiency of energy systems, such as compact heat exchangers,
heat pipes, electronic coolers and solar collectors. The values of the
Nusselt number are approximately 50% higher than the values predicted
for laminar flows in channels without porous materials (Lauriat and
Ghafir, 2000). For gas flows, the convective heat transfer coefficient
is higher for systems filled with porous material than that of systems
without porous material. It should be mentioned that many authors and
researchers have extensively studied heat transfer enhancement with and
without porous media and reviews are available (Vafai and Hadim, 2000
and Webb 1997).
The focus of the present
chapter is on the utilization of porous media for heat transfer
enhancement in energy systems performed by our research group, namely; advanced solar air heater,
earth tube and heat Exchanger. |
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3. |
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Hydraulic Modelling of
the Effects of Tidal Flows and Sediment Transport on Channel Geometry
and Flow in Klang River Estuary
Suleymen Aremu Muyib, Muhannad Ahmad Mohammad, Abd Halim
Ghazali,
Badronnisa Yusuf
International Islamic University, Malaysia
Abstract
This study involved the determination of
the effects of tide on channel geometry, flow, and sediment transport
within the Klang River estuary between 1975 and 1999. Survey data as
well as hydraulic modelling using MIKE 11 software were used to
determine the interaction between tidal wave, flow and sediment
transport in the Klang River estuary. The area of flow in all the
section within the study area has the carrying capacity for the design
flood ARI100 of 1293m3/s. However results of the study has revealed that Klang River estuary has decreased in carrying capacity by 40% between
1988 and 1993 resulting in the possibility that the carrying capacity
for the ARI 100 of 1293 m3/s may not be achievable in some areas along
the upstream section. The estuary was found to be well mixed with a low
flow regime or sub-critical flow. Bed load was mainly fine silt with
median diameter (d50) of between 0.006 mm and 0.007 mm. Water depth was
found to be more than 3 m making the estuary suitable for navigation. |
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4. |
Prediction for the
Thermal Performance of Flat Plate Collector using Expert System
Bashria A.A. Yousef , Adam N.M., Daud M Omar H.,
Megat M.H.
University Putra Malaysia
AbstractAn
expert system prototype was developed to support the design of a flat
plate collector for collecting energy which is used for drying purposes
in Malaysia. The climate of Malaysia, can be classified as warm - humid
equatorial and characterized by high temperatures and humidity with
strong radiation, which is filtered through the heavy cloud cover and
high water vapor content in the air. The developed program is capable of
handling Malaysian ambient conditions, collector characteristics, and
material thermal properties. The criteria for solar systems in Malaysia
were used as the input in the program to simulate the performance of the
solar system. The mathematical model was validated by comparing its
output with experimental results. The technique seems to be promising
for use in Malaysia since there was a strong correlation between the
predicted and experimental results. |
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5. |
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High-Speed Data Access
for Medical Applications
M. Poulose, Sarah Paul, and Winny Jose
Institut Teknologi Brunei
Abstract
High-speed data access has become very important for doctors to take
advantage of the wide variety of diagnostic and surgical tools currently
available. It is also a great enabler and efficiency enhancer for health
service providers. It provides doctors access to vast sources of
knowledge and information, which empower them to help patients live
happier and healthier. Internet has become a very useful and powerful
source of information for the health care sector and there has been a
phenomenal increase in doctors and related personnel using it for
several purposes like telemedicine etc. The ever-increasing multimedia
content such as pictures, video clips and audio has greatly increased
the volume of data of medical interest. However, in many parts of the
world doctors find accessing data and information from sources including
the Internet very slow and often frustrating. Studies have shown that
doctors and patients would benefit greatly from speedy, real-time access
to medical information. This paper presents possible and feasible
schemes for implementing high-speed data access for medical
applications. While passive optical networks (PON) capable of delivering
very high data rates (gigabits per second) may be contemplated in the
long run and with higher investments, it is shown that highly feasible
and cost-effective solutions are possible in a shorter time frame by
deploying a family of digital subscriber line (DSL) technologies capable
of delivering megabits of data over existing copper telephone lines to
doctors, hospitals and clinics. |
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6. |
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New Technique in
Fingerprint Matching based on An-AVL Tree Search Algorithm
Ahmed Baba Elmadani, Veeraraghavan Prakash, Borhanuddin Mohd. Ali,
Abdul Rahman Ramli and Kasmiran Jumari
Sebha University, Libya
Abstract
The current commercial automated fingerprint systems available in the
market are based on either minutiae or whole image. Both systems suffer
from searching time. That is because of using a sequential algorithm in
the search, and then they suffer from false acceptance (FAR) and false
rejection (FRR) rates. This paper will present a system prototype that
uses Adelson Velskii and Landis (AVL) tree searching technique to
perform a faster user information retrieval and will avoid errors caused
by FAR and FRR. The paper contains our experiment results. |
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7. |
Implementation of
Resonant Frequency and H Bridge Inventers in Induction Heating
Nabil Abdul Kadir, Ahmed Maliki, Ferry Syafrizal
Institut Teknologi Brunei
Abstract
This paper presents a hardware development of a Resonant Inverter
designed for low power induction heating. The Resonant Inverter
technique is introduced to minimize the number of power switching
devices implemented in the system. The use of DC to AC power MOSFET
inverter is to generate 50 kHz magnetic flux could be used to heat up
the stainless steel vessels. Power MOSFET (IRF840) with rating 500V/ 8A
is used as resonant inverter with operating frequencies up to 50 kHz.
The heating coil with a few layers is designed as concentric flat coils
which is connected together in away to produce maximum flux to be
penetrated in the magnetic material vessel. |
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8. |
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Changes in Carbon,
Nitrogen and the Carbon/Nitrogen Ratio during Composting of Sewage
Sludge
Kabbashi, N. A, Fakhru'l-Razi Ahmadun, K.B.
Ramachandran
and Azni bin Idris
International Islamic University, Malaysia
Abstract
Scholars have been working to scientifically manage the increasing
amount of sludge produced by wastewater treatment plants. However, the
strict criteria for waste disposal, imposed by the national legislation
make the management of sludge more difficult. This is particularly true
because of the larger volumes produced and the lack of sites suitable
for landfilling or agricultural use within an economical distance. The
C/N ratio is often used as an index of compost maturity despite many
pitfalls associated with this approach; it seems to be a reliable
parameter for following the development of the composting process. In
this work the experimental data showed that the C/N ratios in the final
composts were 17.6, 18.4, 17.8, 15.9 and 18.1 in the case of experiments
T1, T2, T3, T4 and T5, respectively. These ratios are considered to be
acceptable, where compost T1 of C/N ratio 17.6, and T4, with a C/N ratio
of 15.9 can be considered to be mature. |
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9. |
Towards Implementing
Multimedia Technologies for Classroom Learning in Brunei
Darussalam
M M Poulose, Zainidi bin Hj Abdul Hamid and
Joffry Hj. Bungsu
Institut Teknologi Brunei
Abstract
Conventional teaching methods, especially in the technical education
stream, have several shortcomings. Advances in technology have given
rise to multimedia communications which can provide several useful
applications in areas of education. From pre-school to continuing adult
education and training, at home, school, or college, multimedia
communications can play a vital role in developing the concept and
practice of lifelong learning. Multimedia-based learning strategies and
approaches can help to create a rich learning culture and help students
address the performance needs of a rapidly changing work environment.
This paper examines some of the advantages of emerging technologies such
as multimedia in classroom teaching and learning. It presents the
various aspects of implementing multimedia technologies for education in
Brunei Darussalam with a view to creating new capabilities and
opportunities in a fast changing technological environment. |
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10. |
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Protocol Conversion
FROM HDLC TO IEC 870 Communication Protocol Standards
Laith Ihsan Khalil, Sarkout N. Abdullah
Baghdad University, Iraq
AbstractA
protocol converter is designed to make controlling station that
implement HDLC protocol standard be able to communicate with controlled
station implement IEC870 protocol standard.
The two protocols are studied to determine the similarities and
differences between them. Each application function of the two protocols
is modeled using communication finite state machine module and then
these modules are verified against error.
Since the two protocols are multifunction protocols, a converter is
constructed for each application function. The constructed converters
are verified against errors.
Finally, the two protocol converters are designed and implemented using
Microsoft visual C++ programming language that operates under Windows
environment. The designed software have been tested and worked
successfully. |
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11. |
Student's Perception
of English Language Programs: A Comparative Study at Two Technical
Colleges
Afzaal H. Seyal , Anthony Phillips and Abbas Zaidi
Institut Teknologi Brunei
Abstract
This paper
investigates the attitudes and perceptions of one hundred students of
two technical colleges in Brunei Darussalam towards English Language
Program (ELP). Almost identical program is offered by these two colleges
that have entirely different entry-level requirement and award different
set of qualifications. The study results indicated that no significant
difference was noticed in the students’ skills and learning. However,
statistically significant difference existed in attitudes of the
students of two colleges. There also exists a relationship between
students’ satisfaction with ELP and in their overall attitude and skill
as well. Gender and age are found insignificant. Based upon the
analysis, conclusion has been made together with some recommendations
for further studies. |
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12. |
Performance comparison of Gray-Coded M-Quadrature
Amplitude Modulation in Coded and Uncoded Orthogonal Frequency division
Multiplexing Techniques over Additive White Gaussian Noise
Nor K. Noordin, Borhanuddin M. Ali, S. S.
Jamuar, Tharek. A. Rahman,
and Mahamod B.
Ismail
University Putra Malaysia
Abstract
In this paper, we investigate and compare
the performance of various Gray coding M-quadrature amplitude modulation
(M-QAM) schemes in uncoded and coded Orthogonal Frequency Division
Multiplexing (COFDM). Coded OFDM utilizing forward error correction as
channel coding is investigated to determine the optimum rate and length
of convolutional encoder employing Viterbi decoding algorithm. ¼ rate
convolutional coding with length 10 utilizing octal code generator of
[1117 1365 1637 1653] outperforms other rates and lengths by at least 3
dB in 64-QAM. In comparison to uncoded OFDM, COFDM performs at least 10
dB better for eg. in 64-QAM to achieve a BER of 10-3 transmitting 500 subcarriers. Further works is currently ongoing to include adaptive bit
loading to ensure efficient bandwidth utilization as well as to
formulate a forward error correction code that would reduce the peak to
average power ratio commonly found in OFDM transmission. |
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13. |
El-Nino and La-Nina - in the context of Brunei
Darussalam
Dr Sikandar Khan Khatri
Institut Teknologi Brunei
Abstract
Climate changes have important implications for the economy of a
country. The recent phenomenon of Asian Tsunami and hurricane season has
shown that these events can result in devastating damage to both people
and property.
The weather changes take place due to ocean and atmosphere interaction,
and the two processes of El Nino and La Nina result in substantial
changes in climate in various parts of the world. The changes in both
temperature and rainfall would affect the people and thus their forecast
helps to control and mitigate the effects. This paper examines the weather outlook for Brunei Darussalam in coming
months and general consequences for engineering activities. |
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14. |
Aircraft Family Concepts for High Subsonic Regional
Aircraft
Ir. Prasetyo Edi
University Putra Malaysia
Abstract
The aim of this work is to make a feasibility study of the aircraft
family concepts using a combined Hybrid Laminar Flow Control Variable
Camber Wing (HLFC-VCW) for a high subsonic Advanced Technology Regional
Aircraft (ATRA). The prediction of ATRA’s performance used computational
fluid dynamic and empirical methods. The aircraft family concept using a
combined HLFC–VCW is feasible for ATRA aircraft family from aerodynamic
point of view. |
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15. |
Clustering Location of Forest Fires using
Self-Organizing Map
Ali Selamat and Md. Hafiz Selamat
University Technology Malaysia
Abstract
This paper focuses on clustering the locations of Indonesian forest
fires and visualizing them into a two-dimensional map using a
self-organizing map (SOM) algorithm. The input data is based on the
quantity of the hot spots of forest fires that spread in several
locations within ten months period. We analyze the distributions of the
hot spots locations of the regions that may have the high frequencies to
risk of the forest fires disaster using the SOM algorithm. We have used
a principal component analysis (PCA) to reduce the size of the original
datasets in order to improve the accuracy of the clustering results. The
SOM algorithm has been used to cluster and visualize the map of the hot
spots locations into four groups based on the relative similarity of the
risks of forest fires on each of the regions such as danger level, low
level, high risks, and low risks. From the analysis we have found that a
time period where the highest level of quantity and intensity of the
forest fires occurs in some regions can be clearly classified. |
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16. |
Trademark Matching Based on Robust Features using
Counter-Propagations Neural Network
Muhammad Faisal Zafar, Dzulkifli Mohamad
University Technology Malaysia
Abstract
The classification and recognition of 2-dimensional trademark patterns
independently of their position, orientation, size and scale by
proposing a new feature vector has been discussed. The feature
extraction is based on local as well as global statistics of the image.
These features have appealing mathematical simplicity and are versatile.
In this approach each gray image is computed by automatic thresholding
and segmentation algorithms. Pixel information of segmented regions is
treated by different geometric and numeric operations to form the
feature vector. Second part of this work takes into account the use of
counterpropagation neural networks (CPN) for training and matching
tasks. Proposed feature vector is applied at input of CPN. The
effectiveness of the proposed feature vector is tested with various
trademarks which were not used in learning phase. |
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17. |
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Impact and Bending Properties of Pineapple Leaf Fibre
(PALF) Reinforced Polypropylene (PP) Laminated Composites
R. M. N. Arib, S. M. Sapuan, M. A. M. M.
Hamdan, M. T. Paridah and H. M. D. Khairul
Zaman
University Putra Malaysia
Abstract
Pineapple leaf fibre which is rich in cellulose, relatively inexpensive
and abundantly available has the potential to be used as reinforcement
for polymer composite. The present study investigated the impact and
bending properties of pineapple leaf fibre-polypropylene (PALF-PP)
composites as a function of volume fraction. The work of fracture or
impact strength of the composites were found to be increased with the
increase in fibre content. A comparatively higher impact strength is
observed for composite with 2.7 % volume fraction. However, at higher
percentages of volume fraction (5.4%, 10.8% and 16.2%) the work of
fracture decrease by about 19.2% and then 2.7% of volume fraction. It
may be due to the fact that the addition of fibre requires less energy
to initiate a crack, void and low interfacial adhesion between fibre and
resin. The flexural modulus gives higher value at 2.7% volume fraction.
The flexural strength of the composites containing 5.4% volume fraction
was found to be higher than that of pure polypropylene resin by 5.1%.
Scanning electron microscopic studies were carried out to understand the
fibre–matrix adhesion and to study the behaviour of fibre during
breakage. |
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18. |
Strenghting ATM Authentication Protocols
L. A. Mohammed, Abdul Rahman Ramli , and M.
Daud
Swinburne Sarawak Institut of Technology, Malaysia
Abstract
Authentication methods for bank cards have little changed since their
introduction in the 1950’s. Typically, the authentication design
involves a trusted hardware device called smart card or token. These
cards can be categorized into microprocessor cards or memory cards. The
card holder’s Personal Identification Number (PIN) is usually the only
means to verify the identity of the user. Further, many existing designs
based on such devices use a delegation technique whereby the device acts
on behalf of the user by deploying its strong cryptographic capability.
However, due to the limitations of such design, an intruder in
possession of a user’s device can discover the user’s PIN with brute
force attack. For instance, in a typical four digits PIN, one in every
10,000 users will have the same number. In this paper, we proposed a
range of authentication protocols suitable for smart card applications
such as in bank ATM financial transactions. We consider a situation
whereby the user has a trusted personal device or token. In this case
the user has to identify himself/herself to the bank computer through
the terminal since the device is trusted. Secondly, we consider a
situation whereby the terminal is not trusted. In this case, the
authentication protocol allows the card to authenticate the terminal and
verse visa. |
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19. |
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20. |
Caution Required to Interpret Results of Experimental
Studies - A Bottom Friction Case Study
Dr Sikandar Khan Khatri
Institut Teknologi Brunei
Abstract
The wind wave hindcasting and forecasting plays an important role in the
planning of a number of coastal engineering projects as well as for
taking safety measures against the extreme events such as hurricanes. A
number of numerical models have been developed in recent years, however,
the predictions have been more reliable for deep water as compared to
finite water depth. Two most important factors that affect wind wave
forecasting are non-linear wave interactions and for finite water depth,
the bottom friction. Non-linear wave interactions have both positive and
negative signature whereas bottom friction is an important sink.
Together these bring about significant changes in wave spectrum and
hence affect wave forecasting. This paper examines the effect of bottom
friction on wave evolution.
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Last updated: August 2006
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