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1
Content available remote Short Term Electricity Demand Forecasting of an Isolated Area using Two Different Approach
Islam A., Hasib S. R., Islam M. S.
Journal of Power Technologies
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2013
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Vol. 93, nr 4
185--193
EN
Electricity demand forecasting of an off-grid area, where no previous load data is available, is an important prerequisite for power system expansion planning. Bangladesh is a small as well as densely populated country in South Asia with a large portion of the population living under poverty line. About 48.5% of the total population has access in grid electricity. Uninterruptable power supply is one of the most important parameter for future development which ends up with a decision of obvious expansion of present grid coverage. This paper represents an analysis to forecast the electricity demand of an isolated island in Bangladesh where past history of electrical load demand is not available. The analysis is based on the identification of factors on which electrical load growth of an area depends. The forecasting has been done through inverse matrix calculation and linear regression analysis method. It has been found that the demand data, calculated from two different approaches, are close enough which spans the reliability of the proposed method. This method can be applicable for short term load forecasting of any isolated area throughout the world.
2
Content available remote Surface electromyography for assessing triceps brachii muscle activities: a literature review
Ali A., Sundaraj K., Ahmad R. B., Ahamed N. U., Islam A.
Biocybernetics and Biomedical Engineering
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2013
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Vol. 33, no. 4
187--195
EN
The goal of this review was to summarise the scientific findings of research conducted on the triceps brachii muscle using surface electromyography. To achieve this goal, we searched through several articles available from the online databases ScienceDirect and SpringerLink published in the English language between January 2008 and June 2012. We specifically searched for the phrases ‘‘EMG’’ and ‘‘triceps brachii’’ in the title, abstract, keywords or methods sections. From a total of 569 articles we identified 77 potentially relevant studies where 42 studies have been examined triceps brachii muscle activity using surface electromyography that applied in the field of rehabilitation, physiological exercise, sports, and prosthesis control. Among the 42 articles found, 16 studies have been examined triceps brachii muscle activity in rehabilitation, 13 for physiological exercise, 9 for sports, and 4 for prosthesis control in this literature review. We therefore believe that the information contained in this review will greatly assist and guide the progress of studies that use surface electromyography to measure triceps brachii muscle activity in the context of rehabilitation, physiological exercise, sports, and prosthesis control.
3
Content available remote Selective separation and determination of cephalosporins by TLC on stannic oxide layers
Nabi S. A., Laiq E., Islam A.
Acta Chromatographica
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2004
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No. 14
92-101
EN
The chromatographic behaviour of some cephalosporins has been studied on synthetic inorganic ion-exchanger (stannic oxide) layers using citrate and borate buffers as mobile phases. Several ternary and quaternary separations have been achieved. The utility of these separations has been demonstrated for estimation of cephalosporins in blood serum from pa-tients.
4
Content available remote Free convection across air gap between corrugated and flat plates
Chowdhury F., Alam S., Akhanda M., Islam A.
Archives of Thermodynamics
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2002
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Vol. 23, no 1-2
39-53
EN
Natural convection heat transfer across air gap between a lower hot semicircular corrugated plate and an upper cold flat plate has been studied experimentally for a range of corrugation aspect ratio (air gap to the amplitude of corrugation), 3.5 < A < 9.5, inclination angle, 0^0 < 0 < 45^0, and Rayleigh number, 3.4 x 10^4 Ra < 2.0 x 10^6. A corrugation plate has been formed with the multi-semicircular bars. The heat transfer coefficients are found to be a strong function of corrugation aspect ratio, inclination angle and Rayleigh number. The results are compared with the available information in the literature on natural convection and found to be about 10% and 20% higher than those for a gap between vee corrugated and flat plate and between two flat plates, respectively. Finally, a correlation has been developed for this configuration for a range of parameters studied herein.
5
Content available remote Thin-layer chromatographic separations of some common pesticides on mixed stannic oxide-silica gel G layers
Nabi S. A., Gupta A., Khan M. A., Islam A.
Acta Chromatographica
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2002
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No. 12
201-210
EN
Thin-layer chromatography (TLC) of fourteen important organophos-phorus, organochlorine, and pyrethroid pesticides has been performed on mixed stannic oxide-silica gel G layers. The results of these studies reveal that this new combination has promising potential for separation of pesticides. RF values of these pesticides have been determined after development with a variety of mixed aqueous and organic mobile phases. Several important and difficult separations of synthetic pesticide mixtures were achieved on the basis of the different transport of the pesticides by the different mobile phases. The practical utility of these separations has been demonstrated by quantitative determination of monocrotophos, dimethoate, and malathion in soil samples.
6
Content available remote Selective separation of metal ions on strong acid cation-exchange resin loaded with crystal violet
Nabi S. A., Laiq E., Islam A.
Acta Chromatographica
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2001
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No. 11
118-120
EN
The cation-exchange resin Amberlite IR-120 has been modified by adsorption of crystal violet at pH 7.0. Several binary and ternary separa-tions of important metal ions were achieved on the basis of their Kd values when chromatographed with different mobile phases. To explore the practical utility of this material Fe2+ and Al3+ were selectively separated from artificial mixtures of metal ions, and Zn2+ and Fe2+ present in three pharmaceutical preparations were also separated.
7
Content available remote Adsorption of metal ions on modified anion-exchange resin selective separation of Fe3+ and Hg2+ from other metals
Nabi S. A., Khan M. A., Islam A.
Acta Chromatographica
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2001
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No. 11
130-138
EN
Adsorption of alizarin red S on strong anion-exchange resin, Amber-lite IRA-400, and the use of the product to separate a variety of metal ions, have been studied. Distribution coefficients of several important metal ions have been determined with different mobile phases to explore the separation potential of these materials. Fe3+ and Hg2+ have been selectively separated from other heavy metal ions by use of a column packed with Amberlite IRA-400 treated with alizarin red S.
8
Content available remote Thin layer chromatographic separation and identification of pyrethroid insecticides on hydrated zirconium oxide layers
Nabi S. A., Islam A., Rahman N.
Acta Chromatographica
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2000
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No. 10
213-221
EN
The thin-layer chromatographic behavior of pyrethroid insecticides (cypermethrin, deltamethrin and fenvalerate) have been studied on hydrated zirconium oxide layers; detection was performed with iodine and o-tolidine reagent. The mobility of these insecticides was screened with several pure and mixed organic mobile phases. Methyl acetate–formic acid (80:20), ethanol–hexane (50:50), and acetone–cyclohexane (60:40) were found to be the most effective for achieving clear and distinct separations. The method has been used for the separation and detection of residues of these insecticides in wheat. Insecticide residues present in the sample at 1 μg levels can be detected by this technique.
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