Influence Of Silica Colloid On Rheology Of Cement Paste With Superplasticizer,
2017
Universiti Brunei Darussalam
Influence Of Silica Colloid On Rheology Of Cement Paste With Superplasticizer, Chuong T.H., Nga P.V.
ASEAN Journal on Science and Technology for Development
Information of rheological behavior of binder paste is important for proportioning high slump concrete mixture at low water to cement ratios. This paper presents experimental data on the rheological property of silica colloid incorporated binder paste using naphthalene based and polycarboxylate based superplasticizer, compared to that of silica fume incorporated binder paste. Experimental data showed that silica colloid incorporated binder is compatible to tested superplasticizers in the all investigated range of silica colloid content, whereas the pastes incorporated with high silica fume content (over 10%) indicated incompatibility, especially to naphthalene based superplasticizer. There was also found out saturated content of …
The Effect Of Inner Diaphragms And Non-Continuous Sill Section On The Stiffness Of Automotive B-Pillar,
2017
Universiti Brunei Darussalam
The Effect Of Inner Diaphragms And Non-Continuous Sill Section On The Stiffness Of Automotive B-Pillar, Tan C.F., Shamsuddin S.A., Shafie M.H.
ASEAN Journal on Science and Technology for Development
The paper discusses the knowledge on the behaviour of T-frame under specific loading will be obtained by experimental methods in order to investigate the deflection of the vehicle B-pillar or T-frame. In addition, a series of T-frame were designed with inner diaphragm at various location in the sill member in order to investigate the effect of inner diaphragm and noncontinuous closed hat section in the sill member. Lastly, the results from the experimental tests were compared with the finite element analysis results to demonstrate the effectiveness of the inner diaphragm in the automotive B-pillar.
Study On Structure And Crystallization Of Polypropylene Grafted Maleic Anhydride/Nanoclay Composite,
2017
Universiti Brunei Darussalam
Study On Structure And Crystallization Of Polypropylene Grafted Maleic Anhydride/Nanoclay Composite, Chuong Bui, Hung Dang Viet
ASEAN Journal on Science and Technology for Development
Nanocomposite from polypropylene grafted maleic anhydride (PP-g-MA) and nanoclay were prepared by melt proccessing in Brabender extruder. XRD analysis shows the formation of nanostructure (intercalated and exfoliated) of nanocomposite with interlayer space (d-space) increasing from 26.3Å to 30.9Å. These structures, however, do not affect the microcrystalline structure of polymer part of nanocomposite in whole. The study on nonisothermal crystallization shows the development in 3-dimentional direction of crystallites, that means spherulite form of crystalline structure.
An Overview Of Thermal Analysis Of Polymers,
2017
Universiti Brunei Darussalam
An Overview Of Thermal Analysis Of Polymers, Chan Sze On Dr Hardy
ASEAN Journal on Science and Technology for Development
This article presents an up-to-date overview of the application of thermoanalytical methods in the study of polymers with special focus on thermogravimetry, differential thermal analysis, diferential scening calorimetry and thermomechanical analysis. The working principles behind the variouse thermoanalytical methods together with modes of operation are described. Their usefulness in the characterisation of polymers is cowered comprehensively with examples cited in the litearture. The question of validity of data obtained from thermokinetic studies of polymers is examined and it is felt that the kinetic parameters generated carry little physical meaning about the kinetic of the polymer reaction.
Prothrombin-Sepharose-Purified Factor V And Its Role In Prothrombin Conversion,
2017
Universiti Brunei Darussalam
Prothrombin-Sepharose-Purified Factor V And Its Role In Prothrombin Conversion, Ong T.C
ASEAN Journal on Science and Technology for Development
Bovine Factor V isolated by the method of Esnouf and Jobin (1967) has been further purified by affiniy chromotgraphy through prothrombin-sepharose. Factor V bound quantitative to the prothrombin-sepharose column. There was a 2-fold increase in the average specific activity (260.000 units/mg protein) of the Factor V recovered. Recovery of total Factor V activity and total protein was about 95% and 90% respectively.
Development In The Analytical Gas Chromatography Of Metal Dialkydithiophospate Complexes,
2017
Universiti Brunei Darussalam
Development In The Analytical Gas Chromatography Of Metal Dialkydithiophospate Complexes, Marriot Dr Philip J
ASEAN Journal on Science and Technology for Development
The gas chromotographic analysis of metal-containing compounds has been a small but reasonably active field for about 25 yeras. Analyses cover such as organometalics, metal complexes, and compounds such as hydrides and halides. Reviews of the fiels may be seen in the books by Moshier and Sievers (1), Guichon and Pommier (2) and Crompton (3), as well as the papers by Uden and Henderson (4) abd Rodrigues-Vasquez (5).
The Mobilization And Utilization Of Scientific And Technological Human Resources In Developing Countries,
2017
Universiti Brunei Darussalam
The Mobilization And Utilization Of Scientific And Technological Human Resources In Developing Countries, Moravscik Michel J
ASEAN Journal on Science and Technology for Development
Human resources (henceforth abbreviated as "manpower") in the development and the functioning of science and technology in developing countries is the most crucial ingredient, and forms, most often, the bottleneck in evolution. This is so because it takes an extended period of time (decades) to establish an indigenous scientific and technological manpower of sufficient quality and quantity, and because it is a much more difficult and uncertain undertaking to do so than to asquire sufficient financial resources. For this reason problems related to the generation and utilization of scientific and technological manpower are at the very centre of attantion when …
Fungsi Associated With Ipil-Ipil (Leucaena Leucocephala) (Lam) De With Seeds And Their Control,
2017
Universiti Brunei Darussalam
Fungsi Associated With Ipil-Ipil (Leucaena Leucocephala) (Lam) De With Seeds And Their Control, Quiniones Sebastian S
ASEAN Journal on Science and Technology for Development
Thirteen fungi were isolated from Leucaena seeds from different places in the philipines. These were; Fusarium moniliforme, F. solani, F. semitecctum, Botryodiplodia theobromae, Cephalosporium sp., Phoma sp., Phoma sp., Cladosporiumsp., Chaetomium sp., Chaetomiun sp., Penicilium sp. and Aspergilus flavus. C. graminiculo completely inhibits the germination of seeds once it has colonized the seeds.
New Upper And Lower Bounds Line Of Sight Path Loss Models For Mobile Propagation In Buildings,
2017
Universiti Brunei Darussalam
New Upper And Lower Bounds Line Of Sight Path Loss Models For Mobile Propagation In Buildings, Phaiboon Supachai, Phokharatkul P., Somkuarnpanit Suripon
ASEAN Journal on Science and Technology for Development
This paper proposes a method to predict line-of-sight (LOS) path loss in buildings. We performed measurements in two different type of buildings at a frequency of 1.8 GHz and propose new upper and lower bounds path loss models which depend on max and min values of sample path loss data. This makes our models limit path loss within the boundary lines. The models include time-variant effects such as people moving and cars in parking areas with their influence on wave propagation that is very high. The results have shown that the proposed models will be useful for the system and …
Electroresponsie Behavior Of Polyelectrolyte Gels (Acrylic Acid-Co-N-N' Methylene Bisacrylamide) Under The Influence Of Electric Field,
2017
Universiti Brunei Darussalam
Electroresponsie Behavior Of Polyelectrolyte Gels (Acrylic Acid-Co-N-N' Methylene Bisacrylamide) Under The Influence Of Electric Field, Nam Nguyen Phuong Hoai, Mendes Eduado
ASEAN Journal on Science and Technology for Development
Polymer gels which were synthesized from acrylic acid and N-N’ methylene bisacrylamide exhibited electrical sensitive behavior. Their swelling properties and electroresponsive behavior were studied. The results indicated that the water take-up ability of the hydrogel increased with the decreased N-N’ methylene bisacrylamide content within the network. The hydrogel membranes swollen in a neutral NaCl solution, bent toward the cathode under non-contact DC electric fields, and their bending speed and equilibrium strain increased with the increased of applied voltage. In addition, the effect of crosslinker concentration of N-N’ methylene bisacrylamide on bending behavior of the gels have been studied. The equilibrium …
Simulated-Data Adaptation Based Piecewise Linear Transformation For Robust Speech Recognition,
2017
Universiti Brunei Darussalam
Simulated-Data Adaptation Based Piecewise Linear Transformation For Robust Speech Recognition, Thatphithakkul Nattanun, Kruatrachue Boontee, Wutiwiwatchai Chai, Marukatat Sanparith, Boonpiam Vataya
ASEAN Journal on Science and Technology for Development
This paper proposes an efficient method of simulated-data adaptation for robust speech recognition. The method is applied to tree-structured piecewise linear transformation (PLT). The original PLT selects an acoustic model using tree-structured HMMs and the acoustic model is adapted by input speech in an unsupervised scheme. This adaptation can degrade the acoustic model if the input speech is incorrectly transcribed during the adaptation process. Moreover, adaptation may not be effective if only the input speech is used. Our proposed method increases the size of adaptation data by adding noise portions from the input speech to a set of prerecorded clean …
Nonlinear Finite Element Analysis Of Nonseismically Detailed Interior Rc Beam-Column Connection Under Reversed Cyclic Load,
2017
Universiti Brunei Darussalam
Nonlinear Finite Element Analysis Of Nonseismically Detailed Interior Rc Beam-Column Connection Under Reversed Cyclic Load, Supaviriyakit Teeraphot, Pimanmas Amorn, Warnitchai Pennung
ASEAN Journal on Science and Technology for Development
This paper presents a nonlinear finite element analysis of non-seismically detailed RC beam column connections under reversed cyclic load. The test of half-scale nonductile reinforced concrete beam-column joints was conducted. The tested specimens represented those of the actual mid-rise reinforced concrete frame buildings designed according to the non-seismic provisions of the ACI building code. The test results show that specimens representing small and medium column tributary area failed in brittle joint shear while specimen representing large column tributary area failed by ductile flexure though no ductile reinforcement details were provided. The nonlinear finite element analysis was applied to simulate the …
Optical Studies Of Penicillin Group In Relation To Their Medical Activity,
2017
Universiti Brunei Darussalam
Optical Studies Of Penicillin Group In Relation To Their Medical Activity, Kumar R. Jeevan, Prasad G.V.R., Shoaib S.Md., Devadanam G. Paul, Fakruddin K.
ASEAN Journal on Science and Technology for Development
The study of Medical activity of antibiotics is gaining momentum now a days owing to the importance of their curative values. The Medical Activity correlated to molecular interactions,can be studied by various physical techniques, at present optical methods like Refractometry and Polarization are used to study the activity of a few antibiotics like Penicillin. The Refractive Indices Mean Molecular Polarizability Diamagnetic Susceptibilities and Electron Ionisation Cross Section are interpreted in terms of dosages and the toxic effects if any due to over dosages are discussed critically.
Flexural Stress Analysis Of Rigid Pavements Using Axi-Symmetric And Plane Strain Fem,
2017
Universiti Brunei Darussalam
Flexural Stress Analysis Of Rigid Pavements Using Axi-Symmetric And Plane Strain Fem, Sawant V.A., Norazzlina M.S.
ASEAN Journal on Science and Technology for Development
The design of pavement involves a study of soils and paving materials, their response under load for different climatic conditions. In the present study, an attempt has been made to compare stresses predicted using two finite element analyses. First analysis is based on the twodimensional plane strain assumption where as in second approach axi-symmetric condition is assumed to consider three-dimensional behavior of rigid pavement. The results are compared with flexural stresses obtained from conventional Portland Cement Association method. The computed flexural stresses obtained from axi-symmetric condition are found to be in close agreement with PCA method. Results of plane strain …
An Approach Designing Autonomous Robot Navigation System Based On Behavior Coordination,
2017
Universiti Brunei Darussalam
An Approach Designing Autonomous Robot Navigation System Based On Behavior Coordination, Ngo Long Thanh, Pham Long The, Nguyen Phuong Hoang
ASEAN Journal on Science and Technology for Development
Robot navigation using fuzzy behavior is suited in unknown and unstructured environment in which each behavior have an individual task. This paper deals with an approach designing autonomous robot navigation system based on fuzzy behaviors including collision avoidance, wall-following, go-to-target. The proposed hierarchy of fuzzy behaviors is used to fuse the command in which each behavior is a fuzzy inference system and its outputs are fuzzy sets. Its inputs are information fused from sensors using fuzzy directional relationship. The simulation results with some statistics show that the system works correctly.
The Synthesis Of A Novel Bibenzopyran Relied On Electrooxydation Of Malloapelta B By Cyclic Voltammetry,
2017
Universiti Brunei Darussalam
The Synthesis Of A Novel Bibenzopyran Relied On Electrooxydation Of Malloapelta B By Cyclic Voltammetry, Binh Phan Thi, Ninh Bui Hai, Minh Chau Van, Nam Nguyen Hoai, Huong Le Mai, Kiem Phan Van
ASEAN Journal on Science and Technology for Development
A novel bibenzopyran named bimalloapelta (1) was synthesized relying on electrooxydation of malloapelta B by cyclic voltammetry in acetonitril adding LiClO4 0.1 M as supporting electrolyte. Its structure determination based on extensive NMR studies and ESI mass spectral measurements. The new compound showed significant cytotoxicity againsts two cancer cell lines as human hepatocellular carcinoma (Hep-2; IC50: 0.46 µg/m) and rhabdosarcoma (RD; IC50: 0.33 µg/m). These results were the same that of malloapelta B (Hep-2, IC50: 0.49 µg/ml and KB, IC50: 0.54 µg/ml).
Survivability In Metro Ring Network Using Oxadm,
2017
Universiti Brunei Darussalam
Survivability In Metro Ring Network Using Oxadm, Ab-Rahman Mohammad Syuhaimi, Shaari Sahbudin
ASEAN Journal on Science and Technology for Development
The optical cross add and drop multiplexing (OXADM) node described in this paper increases the capacity, flexibility and reliability of the trunk-line optical network used for data communication. It features two different bandwidths which operate in working and protection line in a ring configuration. The OXADM has the same features of the conventional OADM node but with more efficiency and reliability. The OXADM prototype system focuses on providing survivability through restoration against failures, such as cable/fiber cut in optical layer with ring topology. Two types of restoration scheme have been proposed to ensure data flow continuously by means of linear/ …
Design And Implementation Of A Vhdl Processor For Dct Based Image Compression,
2017
Universiti Brunei Darussalam
Design And Implementation Of A Vhdl Processor For Dct Based Image Compression, Islam Md. Shabiul, Bhuyan M.S., Beg M. Salim, Othman Masuri
ASEAN Journal on Science and Technology for Development
This paper describes the design and implementation of a VHDL processor meant for performing 2D-Discrete Cosine Transform (DCT) to use in image compression applications. The design flow starts from the system specification to implementation on silicon and the entire process is carried out using an advanced workstation based design environment for digital signal processing. The software allows the bit-true analysis to ensure that the designed VLSI processor satisfies the required specifications. The bit-true analysis is performed on all levels of abstraction (behavior, VHDL etc.). The motivation behind the work is smaller size chip area, faster processing, reducing the cost of …
A Review On Energy Efficiency Standards And Labels: Present Status And Implementation Possibilities In Malaysia,
2017
Universiti Brunei Darussalam
A Review On Energy Efficiency Standards And Labels: Present Status And Implementation Possibilities In Malaysia, Mahlia, T.M.I., Masjuki, H.H., Choudhury I.A., R. Saidur And R. Saidur
ASEAN Journal on Science and Technology for Development
This article is a review on energy efficiency standards and labels for household electrical appliances around the world. Through the review of other country experiences on energy efficiency standards and labels, we attempt to identify savings possibilities in Malaysian households. The implementation possibilities of standards and labels for various household electrical appliances in Malaysia are also examined. It is found that various household appliances in Malaysia offer some potential in reducing electricity consumption. Finally, it is concluded that there are many advantages for Malaysia to implement the standards and labels for household electrical appliances as soon as possible in order …
Europium Silicate Thin Films Fabricated By Rf Magnetron Sputtering And Thermal Treatment,
2017
Universiti Brunei Darussalam
Europium Silicate Thin Films Fabricated By Rf Magnetron Sputtering And Thermal Treatment, Shin Young Chul, Kim Eun Hong, Kim Tae Geun
ASEAN Journal on Science and Technology for Development
We report the fabrication and optical characteristics of europium silicate thin films. Layer structures of Eu2O3/SiOX/Si (100) were deposited by an rf-sputtering method and annealed at 1100°C by rapid thermal annealing (RTA). Two methods were used for the deposition of SiOX layer: One was deposited by sputtering using SiO2 target (Ar gas at a rate of 50 sccm) and the other was deposited by reactive sputtering using Si target (Ar gas at a rate of 45 sccm, with an O2 gas at a rate of 5 sccm). Photoluminescence peak at 430 nm was observed in the sample composed of SiOx …
