Integrating Abc And Eva To Evaluate Investment Decisions,
2017
Universiti Brunei Darussalam
Integrating Abc And Eva To Evaluate Investment Decisions, Chiadamrong N.
ASEAN Journal on Science and Technology for Development
The significance of investment is transparent in the world of competitive business. Traditional costing systems in which their emphasizes are for short term savings rather than long term benefits have shown some lacking in providing accurate and reliable cost data for the investment decisions. Activity-based Costing (ABC), which is developed to satisfy some of the weaknesses of the traditional costing systems, can provide valuable insights into the operating processes and come up with more accurate cost data. In this paper, ABC is used to provide significant information for investment decisions. Although, the ABC method provides accurate operating product costs, it …
Application Of Back Propagation Neural Network In Predicting Palm Oil Mill Emission,
2017
Universiti Brunei Darussalam
Application Of Back Propagation Neural Network In Predicting Palm Oil Mill Emission, Azid I.A., Yusoff A.R., Seetharamu K.N., Ahmad A.L.
ASEAN Journal on Science and Technology for Development
The paper presents an approach to investigate and monitor the air pollution caused by the palm oil mill. A concept of dealing with the problem from its causes is used where the sources of pollution from the stack gases were examined. The main causes were from the combustion of shell fibre and of the palm oil. However, in the boiler itself, several parameters like steam load and pressure, fuel capacity and temperature also contribute to the pollution. The study uses Neural Network (NN) to simulate the process of combustion and stack gases. This neural network was trained by using the …
Electrochemical Behavior Of Polycrystalline Copper During The Adsorption Of Co Abstract,
2017
Universiti Brunei Darussalam
Electrochemical Behavior Of Polycrystalline Copper During The Adsorption Of Co Abstract, Salimon J., Kalaji M.
ASEAN Journal on Science and Technology for Development
The electrochemical properties of electrode copper in carbon monoxide-saturated phosphate buffered solution were investigated. The electrochemistry of copper surface was sufficiently changed after the supporting electrolyte solution was saturated with CO. The hydrogen evolution region was depressed and shifted cathodically due to the adsorption process of CO on the copper surface in a linear or terminally bonded manner, Cu-CO . The oxidation and the reduction peaks of copper were significantly changed with two couple of redox peaks. This is due to the subsequent formation and the corresponding reduction of copper(I) and the copper carbon monoxides species. Further changed in electrochemical …
Immobilization Of Invertase On Carboxymethylcellulose Prepared From Nata De Coco For The Inversion Of Sucrose,
2017
Universiti Brunei Darussalam
Immobilization Of Invertase On Carboxymethylcellulose Prepared From Nata De Coco For The Inversion Of Sucrose, Fundador E.O.V., Fundador V.C. Sabularse, Revilleza M.A.J.R.
ASEAN Journal on Science and Technology for Development
Nata de coco, the cellulose produced by Acetobacter aceti with coconut water as substrate, was used as starting material in the synthesis of carboxymethylcellulose after treatment with NaOH and monochloroacetic acid. The product, referred to as carboxymethyl-“nata” (CMN), had a degree of substitution of 0.76, a higher value than those previously reported. This was used in the immobilization of invertase via ionic interaction and adsorptive forces, which produced a viscous colloidal suspension. Agar was incorporated to facilitate pellet formation. Interactions between the agar and the CMN-invertase may have resulted from ionic interactions as well as H-bonding. The immobilized enzyme retained …
Synthesis And Characterisation Of Hydroxyl-Terminated Liquid Natural Rubber By Photo-Fenton Reaction,
2017
Universiti Brunei Darussalam
Synthesis And Characterisation Of Hydroxyl-Terminated Liquid Natural Rubber By Photo-Fenton Reaction, Pham H. L., Do B. T., Pham T. S., Le D. G.
ASEAN Journal on Science and Technology for Development
Hydroxyl-terminated liquid natural rubber (HTNR) was prepared by the photo-Fenton reaction, which was carried out in solution in the presence of H2O2/Fe(II) combined with UV irradiation. The HTNR obtained was characterized by GPC, FT-IR, 1H-NMR, 13C-NMR, DEPT-NMR spectroscopy as well as by chemical methods. A probable mechanism leading to the formation of HTNR was discussed based on the analytical data.
A Preliminary Study: Comparative Toxicity Of Extracts From Tinospora Tuberculata Beumee And Lumnitzera Racemosa Willd On Aedes Aegypti Linnaeus Larvae (Diptera: Culicidae),
2017
Universiti Brunei Darussalam
A Preliminary Study: Comparative Toxicity Of Extracts From Tinospora Tuberculata Beumee And Lumnitzera Racemosa Willd On Aedes Aegypti Linnaeus Larvae (Diptera: Culicidae), Wahizatul A. A., Shasita R.
ASEAN Journal on Science and Technology for Development
Research has been widely made on the potential use of herbal plants as effective agents for mosquito vector control. However, only a few studies have been carried out to investigate the potential insecticidal activity of mangrove plants against these dengue vectors. This study was carried out to examine the comparative toxicity of two mangrove plants, Tinospora tuberculata and Lumnitzera racemosa against the Aedes aegypti larvae. The leaf and stem of T. tuberculata and L. racemosa, were extracted using 95% methanol and these extracts bioassayed against the 3rd instar larvae of aegypti under laboratory conditions. The LC50 values of the crude …
Biodegradation Of Nr Latex-Based Materials Via A Carbon Dioxide Evolution Method,
2017
Universiti Brunei Darussalam
Biodegradation Of Nr Latex-Based Materials Via A Carbon Dioxide Evolution Method, Shabinah F. M. S., Hashim M. Y. A.
ASEAN Journal on Science and Technology for Development
NR as a natural polymer has biodegradable characteristics and their existence was examined using CO2 evolution methods. The CO2 molecule produced by micro-organism metabolisms in the degradation system was quantified using a conventional acidimetric method. An aerobic system was determined as most suitable condition to be examined under this method. The presence of O2 in the system would help micro-organisms to destabilize the natural polymer. The material of LATZ, HA film and NR gloves showed significant weight loss and were able to produce CO2 evolution curves after 45 days in the biodegradation system compared to synthetic polyisoprene films. Gel permeation …
Effects Of Chocolates Using Low Calorie Cocoa Butter Substitutes On Rat’S Plasma Profile And Determination Of Sn-1,3 Position,
2017
Universiti Brunei Darussalam
Effects Of Chocolates Using Low Calorie Cocoa Butter Substitutes On Rat’S Plasma Profile And Determination Of Sn-1,3 Position, Ros-Haniza B.., Mamot S.
ASEAN Journal on Science and Technology for Development
The present study sought to determine the effectiveness of newly developed low calorie chocolate using modified fat through enzymatic interesterification process as cocoa butter substitute of male Sprague Dawley rats (n = 35) compared to cocoa butter as control. Body weight gains did not differ significantly (p>0.05) in all the test groups fed with chocolates which were using different types of fats. Triacylglycerol and cholesterol test showed no significant difference (p>0.05) for all treatment samples. in this study, a pancreatic lipase hydrolysis was performed to determine the fatty acid composition of the sn-2 position of the structure lipids.
Toughening Of Bisphenol-A Diglycidyl Ether-Based Epoxy By Modification With Hydroxyl-Terminated Liquid Natural Rubber,
2017
Universiti Brunei Darussalam
Toughening Of Bisphenol-A Diglycidyl Ether-Based Epoxy By Modification With Hydroxyl-Terminated Liquid Natural Rubber, Pham H. L., Do B. T., Pham T. S., Le D. G.
ASEAN Journal on Science and Technology for Development
Hydroxyl-terminated liquid natural rubbers (HTNRs), prepared by the Photo-Fenton reaction, were used to modify bisphenol-A diglycidyl ether-based epoxy (DGEBA). A chemical link between HTNRs and the epoxy resin was promoted employing toluene diisocyanate. The reactions between elastomers and epoxy resin were followed by FTIR. The mechanical properties of the composites were evaluated and the microstructure was investigated using scanning electronic microscopy. The results showed that the impact resistance of HTNR-modified DGEBA was superior to that of the pure epoxy resin. For the composites with HTNR, the impact resistance increased with elastomer concentration up to 2.5 parts per hundred parts of …
Performance Appraisal Of Non-Governmental Organizations: A Discussion On Pakistan 2010 Floods Response And Recovery,
2017
Universiti Brunei Darussalam
Performance Appraisal Of Non-Governmental Organizations: A Discussion On Pakistan 2010 Floods Response And Recovery, Ali A., Baig N., Khan A.
ASEAN Journal on Science and Technology for Development
The paper examines in detail the role of NGOs (Non-governmental Organizations) in response and recovery phase of a disaster. Donors, INGOs (International Non-governmental Organizations) and NGOs work for the betterment of affected community but due to certain shortfalls, the community did not benefit as much as intended. In this research those gray areas are highlighted in detail through field visits and interaction with the community devastated by 2010 floods. Lack of inter-agency cooperation, partnership with inexperienced local NGOs and lack of transparency and accountability mechanisms are those areas which reduce the effectiveness of response and recovery efforts. These gray areas …
Physical Fitness And Metabolic Profile Among Malay Undergraduates Of A Public University In Selangor Malaysia,
2017
Universiti Brunei Darussalam
Physical Fitness And Metabolic Profile Among Malay Undergraduates Of A Public University In Selangor Malaysia, Emad M., Kandiah M., Lim W. K., Barakatun-Nisak M. Y., Rahmat A., Norasruddin S., Appukutty M.
ASEAN Journal on Science and Technology for Development
This study investigated health-related components of physical fitness consisting of morphological fitness (body fat % or BF %; Body Mass Index or BMI; and waist circumference or WC), metabolic fitness (blood glucose, lipid profiles and haemoglobin) and aerobic capacity (VO2max). This crosssectional study involved 324 undergraduates recruited voluntarily by systematic random sampling from a public university in the city Shah Alam, Selangor Malaysia. The respondents’ aerobic capacity was measured by field fitness tests and anthropometric measurements using standard protocols. The mean BMI of respondents was 22.51 ± 4.18 kg/m2, and majority of the respondents (93%) are within normal range of …
Computational Fluid Dynamics Simulations Of Gas-Liquid Two-Phase Flow Characteristics Through A Vertical To Horizontal Right Angled Elbow,
2017
Universiti Brunei Darussalam
Computational Fluid Dynamics Simulations Of Gas-Liquid Two-Phase Flow Characteristics Through A Vertical To Horizontal Right Angled Elbow, Aung N. Z., Yuwono T.
ASEAN Journal on Science and Technology for Development
Having a clear understanding on the phase distribution of gas-liquid two-phase flow through elbow bends is vital in mixing and separation system designs. This paper presents the computational fluid dynamics (CFD) simulations and experimental observations of gas-liquid two-phase flow pattern characteristic through a vertical to horizontal right angled (90°) elbow. Experimental observations were conducted in a transparent test section that consisted of a vertical pipe, elbow bend and horizontal pipe with an inside diameter of 0.036 m. The CFD simulations were performed by using a computer software package, FLUENT 6.2. Bubbly flow conditions were created in the vertical test section …
Factors Affecting Refrigerator-Freezers Energy Consumption,
2017
Universiti Brunei Darussalam
Factors Affecting Refrigerator-Freezers Energy Consumption, Saidur R. Saidur, Masjuki H.H., Mahlia T.M.I., Nasrudin A.R.
ASEAN Journal on Science and Technology for Development
Two frost-free household refrigerator-freezers, one with 492 liter capacity and one with 460 liter capacity were tested in the laboratory to determine the sensitivity of several variables those influence consumption refrigerator-freezers energy consumption greatly. The effects of single variables such as room temperature, thermostat setting positions, and door openings on the energy consumption were investigated. Using Response Surface Methodology (RSM), a mathematical model has been developed to investigate the combined effect of room temperature, thermostat setting positions, and door opening on the energy consumption of refrigerator-freezers. From the mathematical model, it has been observed that room-temperature has the highest effect …
Giant Magnetoresistance (Gmr): Spinning From Research To Advanced Technology,
2017
Universiti Brunei Darussalam
Giant Magnetoresistance (Gmr): Spinning From Research To Advanced Technology, Kok K.Y., Ng I.K.
ASEAN Journal on Science and Technology for Development
In this paper, we aim to examine the research and development of materials demonstrating the giant magnetoresistance (GMR) property, a novel material property that has revolutionalised the advances of magnetic sensor and mass-memory technology today. A comprehensive outline for the fundamental materials aspects as well as the physics of the underlying mechanisms behind the GMR property is given. Recent development of GMR materials in data storage industry and other potential technological applications exploiting the GMR property are also discussed.
Performance Of Membranes Crosslinked With Glutaraldehyde In Pervaporation Separation,
2017
Universiti Brunei Darussalam
Performance Of Membranes Crosslinked With Glutaraldehyde In Pervaporation Separation, Tan S.H., Ahmad A.L., Nawawi M.G. Mohd., Hassan H.
ASEAN Journal on Science and Technology for Development
Chitosan membranes crosslinked with glutaraldehyde (GA) were prepared through a solution method, where the dry homogeneous chitosan membranes were immersed into the reaction solutions containing 1.25 x 10-3 wt. % of glutaraldehyde (GA). The extent of the crosslinking was controlled by varying the crosslinking time from 1 to 5 minutes. The prepared crosslinked membranes were used for pervaporation dehydration of isopropanol-water mixtures. The influence of feed composition on the separation characteristics has been investigated. The 2-minute-crosslinked-membrane yields the highest water concentrations in the permeate with moderate flux at 50 wt. % of isopropanol in the feed solution. The overall pervaporation …
Catalytic Activity Of Zsm-5 Zeolite Loaded With Transition Metals For The Selective Catalytic Reduction Of Nox,
2017
Universiti Brunei Darussalam
Catalytic Activity Of Zsm-5 Zeolite Loaded With Transition Metals For The Selective Catalytic Reduction Of Nox, Saaid I.M., Mohamed A.R., Bhatia S. Bhatia
ASEAN Journal on Science and Technology for Development
Catalytic activity measurement were carried out on catalysts formulated from ZSM-5 zeolite separately loaded with transition metals (Cu, Co, Ni, Fe) for the removal of NOx in simulated diesel exhaust conditions. Various factors were investigated to compare the performance of these catalysts including catalyst preparation method, Si/Al ratio of the parent zeolite support, and durability in the exhaust stream containing water vapor or SO2. In many experimental conditions except in the presence of water vapor or SO2, Cu-ZSM5 remained the most active catalyst with 100% NOX conversion at around 350°C. C0-ZSM5 and Ni-ZSM5 could also achieve complete NOx conversion but …
Using Two Time Scales Of Turbulence For Boundary Layer Flows,
2017
Universiti Brunei Darussalam
Using Two Time Scales Of Turbulence For Boundary Layer Flows, Saeid Nawaf H.
ASEAN Journal on Science and Technology for Development
A near wall improvement of the k-ε model of turbulence is proposed and evaluated. The present model takes into account the asymptotic behavior of turbulent scales near wall region and for free turbulence region. The Kolmogorov turbulent time scale is introduced as a lower limit. The model is used for prediction of turbulent boundary layer flows. Predictions compared with experimental data of several flow cases, with encouraging results.
Design Of Robust H∞ Power System Stabilizer Using Normalized Coprime Factorization,
2017
Universiti Brunei Darussalam
Design Of Robust H∞ Power System Stabilizer Using Normalized Coprime Factorization, Ngamroo I., Dechanupaprittha S.
ASEAN Journal on Science and Technology for Development
This paper proposes a new design procedure of robust power system stabilizers (PSS) using H∞ control via normalized coprime factorization (NCF) approach. The design procedure of the proposed PSS is systematically described. Moreover, the selection method of the weighting function in H∞ control design is explained in a simple manner. The performance and robustness of the proposed PSS are investigated in comparison with the conventional PSS by examining the case of a single machine connected to an infinite bus (SMIB) system. The simulation results are illustrated to ensure the effectiveness of the proposed PSS.
Electron Microscopy Of Entomopathogenic Fungal Invasion On The Cabbage-Heart Caterpillar Crocidolomia Binotalis Zeller (Lepidoptera: Pyralidae),
2017
Universiti Brunei Darussalam
Electron Microscopy Of Entomopathogenic Fungal Invasion On The Cabbage-Heart Caterpillar Crocidolomia Binotalis Zeller (Lepidoptera: Pyralidae), Hashim N., Ibrahim Y.B., Tan Y.H.
ASEAN Journal on Science and Technology for Development
The infection on Crocidolomia binotalis Zeller by the entomopathogenic fungi Paecilomyces fumosoroseus (Wise) Brown and Smith, Beauveria bassiana (Bals.) Vuill, and Metarhizium anisopliae var. majus (Metsch.) Sorokin was studied histopathologically using electron microscopy. Conidia which landed on the cuticle germinated within four to six hours. In the case of B. basiana, shortly after landing, an appresorium was formed that attached itself fast onto the cuticle at the point of fungal entry. The infected larva then entered the moribund state 12 to 24 hours after inoculation. Death of the larva followed 24 to 48 hours later. By then the body cavity …
Using Crude Palm Oil (Cpo) As Diesel Engine Fuel,
2017
Universiti Brunei Darussalam
Using Crude Palm Oil (Cpo) As Diesel Engine Fuel, Lim T.H., Bari S., Yu C.W.
ASEAN Journal on Science and Technology for Development
In this study, heating was used to lower the viscosity of CPO to an acceptable level. 60°C was found to be the optimum heating temperature for CPO to ensure smooth flow in the fuel system, but heating further up to 100°C did not improve the engine performance. A comparison between CPO and diesel in terms of engine performance, combustion characteristics and emission showed that the brake specific fuel consumprion (bsfc) for CPO was 13% higher at 400 kPa brake mean effective pressure (bmep), and the highest bmep achieved was 13.5% lower. However, CPO fuel gave a brake thermal efficiency. Combustion …
