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Effect of Force Stages Approach for Sensor Less Linear DC Motor Positioning System
By M. Norhisam, H. Ezril, F. Azhar, S.M Bashi and H. Wakiwaka © 2007. Standard and Industrial Research Institute of Malaysia (SIRIM)
Journal of Industrial Technology, Volume 16, Issue 1
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8 views | Related Articles |
89-102 Page(s)
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Abstract
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Linear motor has gained popularity as linear motion drive in industry and factory automation. These developments were encouraged by the advantages offered by linear motors such as flexibility in size and design, and deliver high performance for applications requiring linear motion. However, the main constraint for system designer to consider linear motors in their application is the cost for every complete package of linear motor. Generally, linear motors are more expensive than its counterparts due to the sensory technologies used for positioning system... |
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Keywords
Linear DC Motor, PWM signal, duty cycle. single stage. dual stage. triple stage, quadruple stage
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Harmonics Reduction using Single Phase Shunt Active Filter
By S.M. Bashland S.T. Seong © 2007. Standard and Industrial Research Institute of Malaysia (SIRIM)
Journal of Industrial Technology, Volume 16, Issue 1
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81-88 Page(s)
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Abstract
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Recently, the utility power quality parameters have become an important issue. One of these parameters is the presence of harmonics in the power network. The proliferation of non linear loads contributes to various orders of harmonics and serious current distortion in the electrical power system. The aim of this work is to minimize the harmonic distortion and improve the power factor of non linear loads by using digital-controlled single phase active filter. The designed single phase active filter is controlled by the digital signal processor... |
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Keywords
Active filter, harmonic reduction
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Equilibrium and Kinetic Studies of Methylene Blue Adsorption on Activated Carbon Prepared from Oil Palm Empty Fruit Bunch
By I. A. W. Tan, A. L. Ahmad and B. H. Hameed © 2007. Standard and Industrial Research Institute of Malaysia (SIRIM)
Journal of Industrial Technology, Volume 16, Issue 1
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1 views | Related Articles |
63-79 Page(s)
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Abstract
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Oil palm empty fruit bunch, an abundant agricultural waste product in Malaysia, was used to prepare activated carbon by physiochemical activation method. The pre-treated precursor was first carbonized under inert atmosphere, followed by chemical treatment using potassium hydroxide and physical activation using carbon dioxide. Scanning electron microscopy analysis showed that the activated carbon was porous with well developed pores. Adsorption isotherm of methylene blue onto the activated carbon was determined by batch tests at 300C with initial concentrations of methylene blue ranging from 50 to 500 mg/1... |
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Keywords
Adsorption, empty palm fruit bunch, activated carbon, methytene blue, Langmuir isotherm, pseudo-second-order kinetic model.
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Study on the Magnetic Head Length of Inductive Coil Sensor for Stranded Wire Rope Testing
By M. Norhlsam. N. Wei Shin, H. Noor Hasmiza, N. Mariun, V. Hirama, H. Wakiwaka © 2007. Standard and Industrial Research Institute of Malaysia (SIRIM)
Journal of Industrial Technology, Volume 16, Issue 1
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51-62 Page(s)
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Abstract
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Wire ropes are used widely in industrial applications such as elevators, lift system, cable car system and crane services. Therefore, there is an obvious need to perform tests on the integrity of these wire ropes to avoid any fatal accident due to its internal flaw. Apart from visual inspection, the non destructive test methods are available to check the condition of these wire ropes. Hall sensor and fluxgate sensor are examples of the recent methods for wire rope inspection. In this paper, a combination of two permanent magnets and a search coil are used as inductive coil... |
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Keywords
Wire rope, magnetic head length, non destructive testing, flux leakage, noise threshold, SIN ratio.
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Modelling and Optimisation of Crude Palm Oil and Palm Kernel Production
By Lily Amelia, A. Hassan and D. A. Wahab © 2007. Standard and Industrial Research Institute of Malaysia (SIRIM)
Journal of Industrial Technology, Volume 16, Issue 1
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2 views | Related Articles |
25-49 Page(s)
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Abstract
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The production of crude palm oil and palm kernel is a complex problem due to the influence of some processing variables and environmental factors. The existence of some problems in the processing of crude palm oil and palm kernel, such as the properties of raw material and the lack of processing efficiencies leads to the decrease inquantity and quality of crude palm oil and palm kernel production. Nevertheless, in the production of crude palm oil and palm kernel it is essential to minimise production losses, minimise the deterioration in quality of palm oil and palm kernel during the processing and minimise production costs... |
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Keywords
Crude palm oil, fuzzy expert system, multi objective programminggenetic algo-rithm, direct random search.
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Effect of OPEFB on Mechanical Properties and Processibility of CPE-Impact Modified PVC-U Composites
By Aznizam Abu Bakar, Azman Hassan and Ahmad Fuad Mohd Yusof © 2007. Standard and Industrial Research Institute of Malaysia (SIRIM)
Journal of Industrial Technology, Volume 16, Issue 1
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1 views | Related Articles |
13-23 Page(s)
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Abstract
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The effect of OPEFB fillers on the mechanical properties and processibility of CPE-impact modified PVC-U composites were investigated. The poly (vinyl chloride) (PVC) resin, chlorinated polyethylene (CPE), oil palm empty fruit bunch (OPEFB) filler,
and other additives were first dry-blended using a laboratory blender before being sheeted with a two-roll mill. Test specimens were then hot pressed, after which the mechanical properties were determined. The processibility studies of the dry-blends were carried out using a Brabender Torque Rheometer... |
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Keywords
PVC-U, CPE, OPEFB filler, impact strength, flexural properties, fusion time.
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Asean Cooperation in the Field of Non-Conventional Energy
By lr. Mohamad Fadzll bin Adnan @ Nan © 2007. Standard and Industrial Research Institute of Malaysia (SIRIM)
Journal of Industrial Technology, Volume 16, Issue 1
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3 views | Related Articles |
1-11 Page(s)
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Abstract
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The ASEAN region has a population of more than 500 million people within its 10 member countries. Since its formation 38 years ago, significant changes and improvements have been seen, particularly in the field of science and technology. Chronologically, commencing in 1971 the Committee on Science and Technology (COST) was first established with the purpose to promote and 1ntensify cooperation in science and technological activities and to raise the level of technological and scientific advancement of member countries... |
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Keywords
ASEAN cooperation, SCNCER, cogeneratron, drying technology
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Domestic Sewage Sludge Application to an Acid Tropical
Soil: Part III. Fractionation Study of Heavy Metals in Sewage
Sludge and Soils Applied with Sewage Sludge
By A. Rosazlin, I. Che Fauziah, A.B. Rosenani & S. Zauyah © 2007. Malaysian Society of Soil Science
Malaysian Journal of Soil Science, Volume 11, Issue 1
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81-95 Page(s)
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Abstract
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Soil fractionation studies of heavy metals can provide insight into their solubility and chemical reactivity in terms of labile and non-labile pools of these metals. The fractionation of cadmium (Cd), copper (Cu), nickel (Ni), lead (Pb) and zinc (Zn) in domestic sewage sludge, soil, soil applied with NH4SO4 and soil applied with sewage sludge was studied after the first and third maize cycles. The second cycle did not give significant yield results because of the dry period during this cycle. The correlation between different forms of heavy metals in the soil and content in maize grain was also investigated... |
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Keywords
Sewage sludge, fractionation study, geochemical forms, labile
and non-labile pool, correlation study
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Characterisation and Composting of Tannery Sludge
By Mahdi Haroun, Azni Idris & S.R. Syed Omar © 2007. Malaysian Society of Soil Science
Malaysian Journal of Soil Science, Volume 11, Issue 1
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71-80 Page(s)
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Abstract
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Tannery industries create serious environmental problems especially in terms of polluting organic effluent and hazardous solid waste as a result of hides and skin processing. It is very important that tannery waste in the form of sludge is managed in an environmentally sound manner. This study focuses on the characterisation of tannery sludge and its development as a composting material. The results show that electrolytic conductivity (EC) of the compost was 2.0 mS cm-1, pH 6.6 and C/N ratio of 16. Total concentrations of chromium, zinc, copper, lead, and cadmium in dry compost were reduced and complied with the standards of the Canadian limits, thus classifying them excellent for making the compost suitable for use as a fertiliser and soil conditioner... |
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Keywords
Composting, tannery sludge, pathogens, heavy metals, germination
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Relationship between Metals in Vegetables with Soils
in Farmlands of Kuching, Sarawak
By Devagi Kanakaraju, Nur Aa’in Mazura
& Awang Khairulanwar © 2007. Malaysian Society of Soil Science
Malaysian Journal of Soil Science, Volume 11, Issue 1
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1 views | Related Articles |
57-69 Page(s)
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Abstract
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The accumulation of Fe, Zn, Cu, Mn, Co and Pb in vegetables was investigated in two farmlands, Siburan and Beratok at Kuching, Sarawak. Leafy and fruit vegetable samples were collected and analysed for metal content using the acid wet digestion method. Topsoil samples (0-30 cm) were characterised for pH, organic matter, particle size, nitrogen content, phosphorus content and heavy metals. Leafy vegetables accumulated higher amount of metals compared to fruit vegetables. Metals were determined at the highest concentrations in leaves of kale at Beratok compared to other plant parts... |
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Keywords
Metals, vegetables, soil, correlation
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Arbuscular Mycorrhizal Inoculation and Phosphorus
Mobility in Phosphorus-Fixing Sweetpotato Soils
By V.S. Harikumar & V. P. Potty © 2007. Malaysian Society of Soil Science
Malaysian Journal of Soil Science, Volume 11, Issue 1
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45-56 Page(s)
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Abstract
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Phosphorus (P) mobility in three P-fixing (laterite, red and sandy) sweetpotato soils in relation to inoculation with arbuscular mycorrhizal (AM) fungi Glomus microcarpum has been studied through a pot culture trial for two seasons. In all the inoculated soils, irrespective of season, the sweetpotato plants had a comparatively high rate of colonisation. However, increased P level in the soil tended to decrease colonisation. Percentage root colonisation increased with days after planting (DAP) while, the spore density in the root-zone soil decreased with DAP... |
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Keywords
AMfungi,G.microcarpu, P-fixing soil, Pmobility, sweetpotato
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Effect of Organic-based and Foliar Fertilisers on
Cocoa (Theobroma cacao L.) Grown on an Oxisol in Malaysia
By N. Noordiana, S. R. Syed Omar, J. Shamshuddin
& N. M. Nik Aziz © 2007. Malaysian Society of Soil Science
Malaysian Journal of Soil Science, Volume 11, Issue 1
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29-43 Page(s)
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Abstract
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The Malaysian cocoa industry is facing many problems due to cocoa being grown on marginal soils, such as Ultisols and Oxisols. These soils are generally acidic, low in basic cations and also low in soil cation exchange capacity. A field study was undertaken to investigate the effect of organicbased and foliar fertilisers on soil fertility improvement, the growth of matured trees, yield and quality of cocoa grown on an Oxisol in Malaysia. The treatments (with four replications) consisted of T1: NPK (fertiliser) (control), T2: organic-based fertiliser + NPK, T3: foliar + NPK, T4: foliar + Ca-foliar + NPK and T5: organic-based fertiliser + foliar + Ca-foliar + NPK applied on approximately 5-year-old cocoa plants located at the Malaysian Cocoa Board Experimental Station, Jengka, Pahang... |
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Keywords
Organic-based fertiliser, foliar fertiliser, cocoa yield, bean
quality, Mn toxicity
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Effects of Nitrohumic Acids Derived from Low Grade Coal
of Sarawak on Aggregate Stability of Loamy Sand and
Clay Loam
By S.F. Sim, S. Lau, N. Omar & D.F. Abang © 2007. Malaysian Society of Soil Science
Malaysian Journal of Soil Science, Volume 11, Issue 1
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17-27 Page(s)
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Abstract
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Humic acids are commonly used to improve the aggregate stability of soils; however, it is not popular in this region. In this paper, low grade coal from Mukah was used as the source of nitrohumic acids and the effects of the nitrohumic acids on the aggregate stability of loamy sand (83.5% sand, 16.4% clay) and clay loam (31% sand, 37% clay) were investigated. Nitrohumic acids were prepared with nitric acid pretreatment and extracted with acid base fractionation. On loamy sand and clay loam, six application rates of nitrohumic acids (0... |
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Keywords
Nitrohumic acids, low grade coal, aggregate stability, loamy
sand, clay loam
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Effects of Lime and Fertiliser Application in Combination
with Water Management on Rice (Oryza sativa) Cultivated
on an Acid Sulfate Soil
By Totok Suswanto, J. Shamshuddin, S.R. Syed Omar, Peli Mat
& C.B.S. Teh © 2007. Malaysian Society of Soil Science
Malaysian Journal of Soil Science, Volume 11, Issue 1
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1-16 Page(s)
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Abstract
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Acid sulfate soils are widespread along the coastal plains of the Malay Peninsula, with some being cultivated with rice. Following farmers’ practice, rice yields are very low due to low pH and prevailing adverse conditions such as Al and/or Fe toxicity. A study was conducted in a glasshouse to determine the effect of lime and fertiliser application in combination with water management on rice cultivated on an acid sulfate soil, using MR 219 rice variety as the test crop. The soil used was Typic Sulfosaprists... |
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Keywords
Rice, ground magnesium limestone, acid sulfate soil, aluminum,
iron
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The Informing Sciences at a Crossroads: The Role of the Client
By T. Grandon Gill
Anol Bhattacherjee © 2007. Informing Science Institute
Informing Science: The International Journal of an Emerging Transdiscipline, Volume 10
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0 views | Related Articles |
17-39 Page(s)
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