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Articles 361 - 390 of 590
Full-Text Articles in Biotechnology
Numerical Result For Variational Inequality Problems With Equality Constraint, Loi Pham Van
Numerical Result For Variational Inequality Problems With Equality Constraint, Loi Pham Van
ASEAN Journal on Science and Technology for Development
In this paper we present some numerical results for illustrating a theoret- ical results obtained in our investigation in the field of variational inequality problems with constraint in the form of operator equation involving monotone operator.
Potassium Permanganate As Oxidant In The Cod Test For Saline Water Samples, Goh Chin-Ping, Lim Poh-Eng
Potassium Permanganate As Oxidant In The Cod Test For Saline Water Samples, Goh Chin-Ping, Lim Poh-Eng
ASEAN Journal on Science and Technology for Development
The objective of this study is to investigate the feasibility of applying potassium permanganate (KMnO4) as the oxidant in the COD test for highly saline water samples. Initially, the COD values of various glucose standard solutions were determined by three methods, namely the standard closed reflux dichromate (CODCr), the acidic permanganate (CODMn) and the alkaline permanganate (CODOH) methods. The results showed that at COD values lower than 20 mg/L, the standard dichromate method was not applicable due to its poor precision (RSD > 10%). The CODOH method was less effective compared to the CODMn method as the recoveries were 0.71 and …
Structural Characterization Of Agar Extracted From Six Red Seaweed Species Growing In The Coast Of Vietnam, Van Tran Thi Thanh, Ly Bui Minh, Buu Ngo Quoc, Kinh Chu Dinh
Structural Characterization Of Agar Extracted From Six Red Seaweed Species Growing In The Coast Of Vietnam, Van Tran Thi Thanh, Ly Bui Minh, Buu Ngo Quoc, Kinh Chu Dinh
ASEAN Journal on Science and Technology for Development
Polysaccharides extracted from six red seaweed species growing in Vietnam have been studied. Characterisation of their structure by chemical and spectroscopic methods showed that all of them have a basic repeating structure of alternating 3-linked b-D-galactopyranosyl and 4-linked 3,6-anhydro a-L-galactopyranosyl units with substituted methyl ether groups. The native agar offers only weak gelling abilities owing to the 4-linked a-L-galactopyranosyl 6-sulfate as its precursor. Conversion of this unit into the corresponding 3,6-anhydride by treating with hot alkali generally led to gel strength increasing. The agars from G. fisheri and G. firma are poorly substituted, while those from G.asiatica, G.tenustipitata and G. …
Fault Location On A Distribution Feeder Using Fault Generated High Frequency Current Signatures, Hizam Hashim, Crossley P.A.
Fault Location On A Distribution Feeder Using Fault Generated High Frequency Current Signatures, Hizam Hashim, Crossley P.A.
ASEAN Journal on Science and Technology for Development
This paper describes how the fault generated travelling waves detected in the current signals at a single location on a distribution feeder can be used for fault location. The method identifies the fault section and the probable location of the fault by comparing the relative distance of each “peak” in the high frequency current signals to the known reflection points in the distribution feeder. The probable fault location is then used within a transient power system simulator that models the actual network. The resulting simulated current waveforms are then cross-correlated against the original signal. If the estimated fault location is …
The Evidence Of Non N-Glycan Linked Mannose In Exochitinase (42 Kda) From Trichoderma Harzianum Bio10671 Glycosylation, Mustafa Muskhazli, Zaman Faridah Qamaruz, Ramli Salfarina, Tohfah Nor Farizan, Ithnin Nalisha, Wallis Greg
The Evidence Of Non N-Glycan Linked Mannose In Exochitinase (42 Kda) From Trichoderma Harzianum Bio10671 Glycosylation, Mustafa Muskhazli, Zaman Faridah Qamaruz, Ramli Salfarina, Tohfah Nor Farizan, Ithnin Nalisha, Wallis Greg
ASEAN Journal on Science and Technology for Development
Chitinase 42 kDa produced by Trichoderma harzianum has been proven as a prime compound to be excreted onto the hyphae of the pathogen causing localised cell wall lysis at the point of interaction. This finally initiate the process of the host cell becomes empty of cytoplasm, disintegrates and shows a rapid collapse. This study investigates the existence of N-glycan linked mannose in chitinase 42 kDa produced by the Malaysian T. harzianum strain BIO10671. The chitinase 42 kDa from T. harzianum BIO10671 was initially purified using anion exchange chromatography prior to a series of experiments such as immunoblotting against the chitinase …
Synthesis Of Acetic Acid From Ethanol By Electrooxidation Technique Using Ni-Cu-Pvc Electrode, Riyanto Riyanto, Othman Mohamed Rozali, Salimon Jumat
Synthesis Of Acetic Acid From Ethanol By Electrooxidation Technique Using Ni-Cu-Pvc Electrode, Riyanto Riyanto, Othman Mohamed Rozali, Salimon Jumat
ASEAN Journal on Science and Technology for Development
A usage of Ni-Cu-PVC electrode for the oxidation of ethanol by electrochemical technique will be reported in this paper. In this work, the effect of electrodes on the yields of acetic acid was determined. Electrode used was made of the mixtures of Ni powder, Cu powder and of polyvinyl chloride (PVC) with various percentages. Electrooxidation of 0.20 M ethanol in 0.16 M KOH (24 mL) were carried out using chrono coulometry (CC) at a potential of 1050 mV for 6 hours with continious stirring. Electrooxdation result obtained was analyzed using High Performance Liquid Chromatography (HPLC). The test result shows that …
Effect Of Injector Opening Pressure On Performance And Emission Of Lpg - Methyl Ester Of Mahua Oil Dual Fuel Engine, Kapilan N.
ASEAN Journal on Science and Technology for Development
One of variables, which affect the performance and emission of dual fuel engine is injection pressure. Hence in the present work, effect of Injector opening pressure on the performance of the engine was studied. A four stroke single cylinder engine was modified to work in dual fuel mode. Three injector opening pressures (180 bar, 200 bar and 220 bar) were considered for the present work. Methyl ester of mahua oil was used as pilot fuel and LPG was used as primary fuel. From the test results, it was observed that the injector opening pressure of 200 bar results in higher …
Dibutyltin(Iv) Alkylcyclohexyldithiocarbamates: Spectroscopic Characterization And Crystal Structures Of Dibutyltin(Iv) N-Methyl And N-Ethylcyclohexyldithiocarbamate, Awang Normah, Baba Ibrahim, Aziz Y. Farina Abd., Yamin Bohari M.
Dibutyltin(Iv) Alkylcyclohexyldithiocarbamates: Spectroscopic Characterization And Crystal Structures Of Dibutyltin(Iv) N-Methyl And N-Ethylcyclohexyldithiocarbamate, Awang Normah, Baba Ibrahim, Aziz Y. Farina Abd., Yamin Bohari M.
ASEAN Journal on Science and Technology for Development
A new series of dibutyltin(IV) alkylcyclohexyldithiocarbamates of the type (C4H9)2Sn[S2CNR(C6H11)]2 (R = CH3, C2H5, i-C3H7) have been successfully synthesized using in-situ method. These compounds were characterized by elemental analysis, infrared and 13C NMR spectroscopy. A single crystal X-ray analysis of dibutyltin(IV) ethylcyclohexyldithiocarbamate, (C4H9)2Sn[S2CN(C2H5)(C6H11)]2 (compound 2) showed that the system of this crystal is triclinic with space group P-1 while dibutyltin(IV) methylcyclohexyldithiocarbamate, (C4H9)2Sn[S2CN(CH3)(C6H11)]2 (compound 1) has monoclinic system and it’s space group is P21/c. In the crystal structure of compound 2, the dithiocarbamate ligands are bidentically chelated to the tin atom with non-equivalent of the Sn-S distances: Sn(1)-S(1) = 2.9255(11) and …
Classification And Zoning Of Water Quality For Three Main Rivers In Binh Tri Thien Region (Central Vietnam) Based On Water Quality Index, Hop Nguyen Van, To Thuy Chau, Tung Truong Quy
Classification And Zoning Of Water Quality For Three Main Rivers In Binh Tri Thien Region (Central Vietnam) Based On Water Quality Index, Hop Nguyen Van, To Thuy Chau, Tung Truong Quy
ASEAN Journal on Science and Technology for Development
Huong, Thach Han and Kien Giang rivers are the important surface water sources in Thua ThienHue, Quang Tri and Quang Binh provinces, respectively (in Central Vietnam). The river water samples were taken monthly (from June 2001 to May 2002 for Kien Giang river and from January to December of 2004 for Thach Han and Huong rivers) at selected sites. The temperature, pH, conductivity (EC), salinity, turbidity (TUR), DO, COD, BOD5, nitrate, ammonia, phosphate, total solids (TS), hardness, total dissolved iron, total coliform (TC), fecal coliform (FC) and sodium adsorption ratio (SAR) of water samples were analyzed. Water quality index developed …
Temporo-Spectral Coherent Structure Of Turbulence And Pressure Using Fourier And Wavelet Transforms, Le Thai-Hoa, Nguyen Dong-Anh
Temporo-Spectral Coherent Structure Of Turbulence And Pressure Using Fourier And Wavelet Transforms, Le Thai-Hoa, Nguyen Dong-Anh
ASEAN Journal on Science and Technology for Development
Studying the spatial distribution in coherent fields such as turbulent and turbulent-induced force ones is important to model and evaluate turbulent-induced forces and response of structures on the turbulent flows. Turbulent field-based coherent function is commonly used for the spatial distribution characteristic of induced forces in the frequency domain. This paper will focus to study spectral coherent structure of turbulence and forces in not only the frequency domain using conventional Fourier transform-based coherence, but also temporo-spectral coherent one in the time-frequency plane thanks to wavelet transform-based coherence for more understanding of the turbulence and force coherences and their spatial distributions. …
Principal Stresses In Non-Linear Analysis Of Bakun Concrete Faced Rockfill Dam, Ahmad Mohd Hilton, Noorzaie Jamaloddin, Al Qbadi Fayda
Principal Stresses In Non-Linear Analysis Of Bakun Concrete Faced Rockfill Dam, Ahmad Mohd Hilton, Noorzaie Jamaloddin, Al Qbadi Fayda
ASEAN Journal on Science and Technology for Development
With rapid population growth and accelerating economic development, much of the world’s WATER which requires urgent attention to ensure sustainable use. Nowadays, Concrete Faced Rockfill Dam (CFRD) is preferred among dam consultant due to its advantages. They are designed to withstand all applied loads; namely gravity load due to its massive weight and hydrostatic load due to water thrust from the reservoir. Bakun CFRD, which ranks as the second highest CFRD in the world when completed, is analyzed to its safety due to both loads mentioned earlier by using Finite Element Method. 2-D plane strain finite element analysis of non-linear …
A Study On The Effect Of Noise And Vibration On Operators’ Readability Task Performance In A Mobile Driving Environment, Khan Iqbal Ahmed, Mallick Z., Khan Zahid A.
A Study On The Effect Of Noise And Vibration On Operators’ Readability Task Performance In A Mobile Driving Environment, Khan Iqbal Ahmed, Mallick Z., Khan Zahid A.
ASEAN Journal on Science and Technology for Development
This paper presents a study in which the effect of noise and vibration on the task performance in a mobile driving environment is experimentally investigated. A readability kind of task, where a reading material was presented to the operators on a laptop screen was considered and the operators performed the task in a sitting posture without their back supported with the backrest of the seat. The task performance was measured in terms of mean number of characters read per minute by the operators, which served as data for statistical analysis. Results of the study showed that noise and vibration were …
Integrated Remote Sensing And Gis For Modeling Economic Rehabilitation Development Of Ex-Mine Sites, Junaidi Junaidi, Goh Eric K.H.
Integrated Remote Sensing And Gis For Modeling Economic Rehabilitation Development Of Ex-Mine Sites, Junaidi Junaidi, Goh Eric K.H.
ASEAN Journal on Science and Technology for Development
The potential environmental impacts of mining, increasing environmental legislation and public awareness have received increased attention world-wide in the last two decades. The focus of concern by the industry, environmental regulatory agencies and members of the public is the systematic rehabilitation of ex-mine sites to improve the quality at site for potential future commercial land use. The minerals extracted from these mine/quarry sites are essential in the construction, semiconductor, high-technology, ceramic and other manufacturing sectors for further industrial development. However, efficient engineering design and systematic economic evaluation of mine sites for site rehabilitation are required in maintaining the expected standards …
Power Signal Disturbance Classification Using Wavelet Based Neural Network, Suja S., Jerome Jovitha
Power Signal Disturbance Classification Using Wavelet Based Neural Network, Suja S., Jerome Jovitha
ASEAN Journal on Science and Technology for Development
In this paper, the power signal disturbances are detected using discrete wavelet transform (DWT) and categorized using neural networks. This paper presents a prototype of power quality disturbance recognition system. The prototype contains three main components. First a simulator is used to generate power signal disturbances. The second component is a detector which uses the technique of DWT to detect the power signal disturbances. DWT is used to extract disturbance features in the power signal. The third component is neural network architecture to classify the power signal disturbances.
Deformation Of Wood In Compression During Moisture Movement, Hamdan S., Osman M.S., Chew M.Y.
Deformation Of Wood In Compression During Moisture Movement, Hamdan S., Osman M.S., Chew M.Y.
ASEAN Journal on Science and Technology for Development
This work presents the phenomenon of mechano-sorptive strain in the deformation of wood during moisture content (MC) changes. A series of experiments were designed to demonstrate the greatly enhanced deformation due to the mechano-sorptive effect. The purpose of this work is to show the magnitude of mechano-sorptive creep compared to the ordinary viscoelastic creep with applied compressive load. In order to do this, several conditions were induced. They were the moisture movement with MC change, moisture movement without MC change and conditions without moisture movement. Several apparatus were assembled to produce the desired conditions. Special care is taken to make …
Effects Of Sr Substitution On Crystalline Structure And Raman Spectra Of La2-Xsrxnio4+Δ, Thanh Tran Dang, Hong Le Van
Effects Of Sr Substitution On Crystalline Structure And Raman Spectra Of La2-Xsrxnio4+Δ, Thanh Tran Dang, Hong Le Van
ASEAN Journal on Science and Technology for Development
Effects of Sr2+ substitution for La3+ on oxygen concentration and structure of La2-xSrxNiO4+δ have been observed by X-ray diffraction and Raman scattering. Oxygen concentration and unit cell volume of the material decrease monotonously in dependence of x. The vibration modes were calculated for La2NiO4 in K2NiF4 type structure with the group symmetry of I4/mmm. The Raman active modes for this symmetry were also theoretically identified. Raman back scattering spectra have been carried out for all the ceramic polycrystalline samples at room temperature. Two Raman lines at 224.6 cm-1 and 433 cm-1 , assigned to Eg and A1g vibration modes of …
Characteristics Of Lithium Lanthanum Titanate Thin Films Made By Electron Beam Evaporation From Nanostructured La0.67-Xli 3xtio3 Target, Dinh Nguyen Nang, Trong Le Dinh, Long Pham Duy
Characteristics Of Lithium Lanthanum Titanate Thin Films Made By Electron Beam Evaporation From Nanostructured La0.67-Xli 3xtio3 Target, Dinh Nguyen Nang, Trong Le Dinh, Long Pham Duy
ASEAN Journal on Science and Technology for Development
Bulk nanostructured perovskites of La0.67-xLi3xTiO3 (LLTO) were prepared by using thermally ball-grinding from compounds of La2O3, Li2CO3 and TiO2. From XRD analysis, it was found that LTTO materials were crystallized with nano-size grains of an average size of 30 nm. The bulk ionic conductivity was found strongly dependent on the Li+ composition, the samples with x = 0.11 (corresponding to a La0.56Li0.33TiO3 compound) have the best ionic conductivity, which is ca. 3.2 x 10-3 S/cm at room temperature. The LLTO amorphous films were made by electron beam deposition. At room temperature the smooth films have ionic conductivity of 3.5 x …
Electrochemical Performances And Corrosion Inhibition Of Aa6061 In Tropical Seawater, Rosliza R., Senin H.B., Wan Nik W.B.
Electrochemical Performances And Corrosion Inhibition Of Aa6061 In Tropical Seawater, Rosliza R., Senin H.B., Wan Nik W.B.
ASEAN Journal on Science and Technology for Development
The corrosion performances of AA6061 aluminum alloy in tropical seawater was investigated using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and their morphology was characterized by the scanning electron microscopy (SEM). The results showed that the presence of sodium benzoate as an inhibitor significantly decrease the corrosion current densities (i corr ), corrosion rates and double layer capacitance (C dl ), whilst increasing the polarization resistance (R p ). The scanning electron microscopy (SEM) images indicated that the mechanism of charge transfer and the formation of thin film have been taken place on the specimens.
Affine-Invariant Fourier Descriptors And Their Application In A Number Plate Recognizing System, Hai Nguyen Thanh, Long Pham The, Dinh Nguyen Cong
Affine-Invariant Fourier Descriptors And Their Application In A Number Plate Recognizing System, Hai Nguyen Thanh, Long Pham The, Dinh Nguyen Cong
ASEAN Journal on Science and Technology for Development
This paper introduces a method for describing partial shapes that are affine-invariant. The proposed method facilitates the extraction of descriptors, which is effective for opened-curves and invariant to different viewpoints. This method helps to improve the performance and quality of real world object image recognizing systems. The proposed method was tested in a number plate recognition system.
A Method Build Fuzzy Associate Memory For Fuzzy Control Problems, Thanh Ha Pham, Cat Ho Nguyen, Nhu Lan Vu
A Method Build Fuzzy Associate Memory For Fuzzy Control Problems, Thanh Ha Pham, Cat Ho Nguyen, Nhu Lan Vu
ASEAN Journal on Science and Technology for Development
Building fuzzy associate memory accordance with control problems has great meaning for control methods In this paper we propose a method, that build fuzzy associate memory for control problem based on optimal trajectory of control problem, the method developed by theory hedge algebras and genetic algorithm.
Some Results Of Study On Present Situation Of Household Solid Waste In Hanoi, Vietnam, Yen To Thi Hai, Ha Pham Thi Thu, Dong Nguyen The, Tuyen Trinh Van, Kawai Kosuke, Matsui Saburo
Some Results Of Study On Present Situation Of Household Solid Waste In Hanoi, Vietnam, Yen To Thi Hai, Ha Pham Thi Thu, Dong Nguyen The, Tuyen Trinh Van, Kawai Kosuke, Matsui Saburo
ASEAN Journal on Science and Technology for Development
This paper presents some results on the study of Solid waste generated by households (hereinafter referred to as HSW) in Hanoi city. Compositions of the waste generated from three typical communities and their relationship with family life-style of each community were investigated. Differences among compositions of HSW of three resident groups of different incomes, lifestyles were analyzed. Based on the study results, some measures for better management of HSW and maximum reuse and recycle of HSW were proposed. By this way, the amount of HSW transported to landfill could be reduced and stabilization phase of landfill sites could be shortened.
Studies On A Novel Recombinant Lipase A From Bacillus Subtilis Fs2, Nguyet Phung Thu, Thanh Nguyen Hong, Hai Truong Nam, Janson Jan-Christer
Studies On A Novel Recombinant Lipase A From Bacillus Subtilis Fs2, Nguyet Phung Thu, Thanh Nguyen Hong, Hai Truong Nam, Janson Jan-Christer
ASEAN Journal on Science and Technology for Development
A strain of Bacillus subtilis FS2 isolated from a traditional fish source in Vietnam has been shown to produce an enzyme possessing both a gelatinase and a lipase A (LipA) activity when tested on agar plates containing 0.1% tributyrin and 0.3% gelatine. A gene encoding LipA was isolated and expressed in E. coli BL21 (DE3). The enzyme has got an apparent Mr of 24 kDa, a pI of 9.2 and was purified to electrophoretical homogeneity by affinity chromatography. Both the lipase and the gelatinase showed optimum activity at pH 10 and at 30 0 C, with highest activity in the …
Pretreatment Of Lignocellulosic Biomass For Enzymatic Hydrolysis, Hoa Doan Thai, Man Tran Dinh, Hau Ngo Viet
Pretreatment Of Lignocellulosic Biomass For Enzymatic Hydrolysis, Hoa Doan Thai, Man Tran Dinh, Hau Ngo Viet
ASEAN Journal on Science and Technology for Development
The cost of raw materials continues to be a limiting factor in the production of bio-ethanol from traditional raw materials, such as sugar and starch. At the same time, there are large amount of agricultural residues as well as industrial wastes that are of low or negative value (due to costs of current effluent disposal methods). Dilute sulfuric acid pretreatment of elephant grass and wood residues for the enzymatic hydrolysis of cellulose has been investigated in this study. Elephant grass (agricultural residue) and sawdust (Pulp and Paper Industry waste) with a small particulate size were treated using different dilute sulfuric …
New Findings Notes Of The Parasitic Nematodes Of Terrestrial Invertebrates In Viet Nam, Luc Pham Van, Thanh Nguyen Vu, Spiridonov S.E.
New Findings Notes Of The Parasitic Nematodes Of Terrestrial Invertebrates In Viet Nam, Luc Pham Van, Thanh Nguyen Vu, Spiridonov S.E.
ASEAN Journal on Science and Technology for Development
First results of the parasitological survey of Vietnamese terrestrial invertebrates performed in 2007 demonstrate extreme diversity of nematodes parasitic in these animals. The most interesting new findings are nematodes of four superfamilies: Drilonematoidea, Thelastomatoidea, Rhabditoidea and Ransomnematoidea. Further progress was achieved in last three years in the studies of Drilonematoidea nematodes – coelomic parasites of earthworms. One new genus and several new species were discovered in large megascolecids collected in Bac Bo (Tam Dao) and Nam Bo (Bidoup - Nui Ba N.P.). Passalidae beetles are colonial coleopterans inhabiting rotten wood in tropical forests throughout tropics, and are known as characteristic …
Study On Some Properties And Morphology Of Composites Based On Polyethylene Grafted Acrylic Acid/Ethylene-Vinyl Acetate Copolymer/Calcium Carbonate, Hoang Thai, Cong Do Van
Study On Some Properties And Morphology Of Composites Based On Polyethylene Grafted Acrylic Acid/Ethylene-Vinyl Acetate Copolymer/Calcium Carbonate, Hoang Thai, Cong Do Van
ASEAN Journal on Science and Technology for Development
Composites based on polyethylene grafted acrylic acid (PE-g-AAc)/ethylene-co-vinylacetate copolymer (EVA)/calcium carbonate (CaCO3) were prepared by melt mixing. Relative melt viscosity, morphology, mechanical properties and thermostability of the composites were studied. The experimental results show that the presence of (CaCO3) activated by stearic acid (10-20 wt.%) changes lightly stable torque of polymer blend of PE-g-AAc/EVA. Use of modified PE improves compatibility of PE and EVA as well as makes the components disperse into each other better than in blends using unmodified PE. Tensile strength and elongation at break of both polymer blends decrease with presence of CaCO3. However, tensile strength of …
Characterization Of Alginate Prepared From Brown Seaweeds In Thua Thien-Hue Province, Vietnam, Thien Tran Vinh, Kinh Chu Dinh, Hoa Tran Thai, Khieu Dinh Quang
Characterization Of Alginate Prepared From Brown Seaweeds In Thua Thien-Hue Province, Vietnam, Thien Tran Vinh, Kinh Chu Dinh, Hoa Tran Thai, Khieu Dinh Quang
ASEAN Journal on Science and Technology for Development
The characterization of alginate prepared from brown seaweeds in TT-Hue province of Vietnam was investigated. Composition and the sequential structure of alginate were determined by 1HNMR, 13C-NMR, TOCSY, 1H-1H COSY, and 1H-13C-HSQC spectrum. It is found that alginate with molecular weight around 101 KDa is composed of homopolymeric regions of M and G blocks, interspersed with very small amount of regions of alternating structure of MG block. This information is essential for application guideline of alginate in TT-Hue province.
Application Of Nmr In The Investigation Of Dynamic Tautomerism Of 4(3h)-Quinazolinone System, My Pham Thi Thanh, Kinh Chu Dinh, Thuy Thanh Thi Thu, Vinh Nguyen Ngoc, Chi Nguyen Thi Phuong
Application Of Nmr In The Investigation Of Dynamic Tautomerism Of 4(3h)-Quinazolinone System, My Pham Thi Thanh, Kinh Chu Dinh, Thuy Thanh Thi Thu, Vinh Nguyen Ngoc, Chi Nguyen Thi Phuong
ASEAN Journal on Science and Technology for Development
Tautomerism of 4(3H)-quinazolinone system with [(2-hydroxyphenyl)methylene]-2-(4oxoquinazolin-3(4H)-yl)acetohydrazide and N’-[(1E)-(4-hydroxy-3-methoxyphenyl)methylene]-2-(4-oxoquinazolin-3(4H)-yl)acetohydrazide as two representative compounds was investigated on the basis of 1H NMR method at coalescence with the help of line formprogramme. The dynamic parameters such as k, Ea, DG*, DH*, DS* were fully calculated with high reliability.
Soil-Structure Interaction Analyses Of Pile Supported Building Frame, Chore H.S., Ingle R.K.
Soil-Structure Interaction Analyses Of Pile Supported Building Frame, Chore H.S., Ingle R.K.
ASEAN Journal on Science and Technology for Development
The effect of the soil-structure interaction on the simple single storeyed and two bayed space frame resting on pile group of two piles with flexible cap is examined in this paper by resorting to more rational approach and realistic assumptions. Initially, 3-D FEA is carried out independently for the frame on the premised of fixed column bases. Later, pile foundation is worked out separately. The stiffness so obtained for foundation is used in the interactive analysis of frame to quantify the effect of soil- structure interaction on the response of the superstructure. For modeling the foundation system two approaches of …
Influence Of Temperature On The Performance Of Photovoltaic Polycrystalline Silicon Module In The Bruneian Climate, Malik A. Q., Ming Lim Chee, Sheng Tan Kha, Blundell M.
Influence Of Temperature On The Performance Of Photovoltaic Polycrystalline Silicon Module In The Bruneian Climate, Malik A. Q., Ming Lim Chee, Sheng Tan Kha, Blundell M.
ASEAN Journal on Science and Technology for Development
The influence of working temperature for a polysilicon module has been investigated in Brunei Darussalam for a period of two years. The rise in temperature produces thermal agitation which not only increases the dark current but also enhances the losses of free carriers in a polycrystalline module. The efficiency and the output power decreases with an increase in the working temperature. A maximum decline in the output power of 97% has been measured under a dominated diffused radiation environment. The temperature coefficients have been obtained and equations are developed to evaluate the change in the rating of module at any …
Genetic Algorithm Based Solution In Pwm Converter Switching For Voltage Source Inverter Feeding An Induction Motor Drive, Jegathesan V.
Genetic Algorithm Based Solution In Pwm Converter Switching For Voltage Source Inverter Feeding An Induction Motor Drive, Jegathesan V.
ASEAN Journal on Science and Technology for Development
This paper presents an efficient and reliable Genetic Algorithm based solution for Selective Harmonic Elimination (SHE) switching pattern. This method eliminates considerable amount of lower order line voltage harmonics in Pulse Width Modulation (PWM) inverter. Determination of pulse pattern for the elimination of some lower order harmonics of a PWM inverter necessitates solving a system of nonlinear transcendental equations. Genetic Algorithm is used to solve nonlinear transcendental equations for PWM-SHE. Many methods are available to eliminate the higher order harmonics and it can be easily removed. But the greatest challenge is to eliminate the lower order harmonics and this is …