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Search Results: 1 - 10 of 401414 matches for " M. Salleh "
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Production of Natural Coagulant from Moringa Oleifera Seed for Application in Treatment of Low Turbidity Water  [PDF]
Eman N. Ali, Suleyman A. Muyibi, Hamzah M. Salleh, Md Zahangir Alam, Mohd Ramlan M. Salleh
Journal of Water Resource and Protection (JWARP) , 2010, DOI: 10.4236/jwarp.2010.23030
Abstract: This study focused on developing an efficient and cost effective processing technique for Moringa oleifera seeds to produce natural coagulant for use in drinking water treatment. The produced natural coagulant can be used as an alternative to aluminum sulphate and other coagulants and used worldwide for water treatment. This study investigates processing Moringa oleifera seeds to concentrate the bio-active constituents which have coagulation activity. Moringa oleifera seeds were processed for oil extraction using electro thermal soxhlet. Isolation and purification of bio-active constituents using chromatography technique were used to determine the molecular weight of the bio-active constituents. The molecular weight of bio-active constitu-ents found to be in a low molecular weight range of between 1000 – 6500 Dalton. The proposed method to isolate and purify the bio-active constituents was the cross flow filtration method, which produced the natu-ral coagulant with very simple technique (oil extraction; salt extraction; and microfiltration through 0.45 µm). The turbidity removal was up to 96.23 % using 0.4 mg/L of processed Moringa oleifera seeds to treat low initial turbidity river water between 34-36 Nephelometric Turbidity Units (NTU) without any additives. The microfiltration method is considered to be a practical method which needs no chemicals to be added com-pared to other researchers proposed methods. The natural coagulant produced was used with low dosages to get high turbidity removal which considered to be a breakthrough in this study and recommended to be scaled up for industry level. The product is commercially valuable at the same time it is minimizing the cost of water treatment.
FABRICATION OF WHITE ORGANIC LIGHT EMITTING DIODE USING PHF DOPED WITH RUBRENE
S. SEPEAI, M. M. SALLEH,M. YAHAYA
Journal of Sustainability Science and Management , 2007,
Abstract: A white organic light emitting diode, OLED is one of the approaches to obtain full color flat screen display. OLED devices with the structure of ITO/PHF: rubrene/A1 have been fabricated where poly (9,9-di-n-hexylfluoreny1-2,7-dyl), PHF used as blue light emitting host and 5, 6, 11, 12-tetraphenyl-napthacene, rubrene as an orange dye dopant. Indium tin oxide, ITO used as anode and aluminium, A1 as cathode. The PHF and rubrene were dissolved in toluene and was then deposited onto ITO glass substrate by spin-coating technique to serve as emitting layer. A white light emitting device with the Commision Internationale de L’Enclairage, CIE 1964 coordinates of (0.3, 0.33) was obtained by varying rubrene concentration in the PHF solution.
A New Multistage Lattice Vector Quantization with Adaptive Subband Thresholding for Image Compression
M. F. M. Salleh,J. Soraghan
EURASIP Journal on Advances in Signal Processing , 2007, DOI: 10.1155/2007/92928
Abstract: Lattice vector quantization (LVQ) reduces coding complexity and computation due to its regular structure. A new multistage LVQ (MLVQ) using an adaptive subband thresholding technique is presented and applied to image compression. The technique concentrates on reducing the quantization error of the quantized vectors by “blowing out” the residual quantization errors with an LVQ scale factor. The significant coefficients of each subband are identified using an optimum adaptive thresholding scheme for each subband. A variable length coding procedure using Golomb codes is used to compress the codebook index which produces a very efficient and fast technique for entropy coding. Experimental results using the MLVQ are shown to be significantly better than JPEG 2000 and the recent VQ techniques for various test images.
Hybrid and Reflective Insulation Assemblies for Buildings  [PDF]
David W. Yarbrough, Khar San Teh, Lim Chin Haw, Elias Salleh, Sohif Mat, M. Yusof Sulaiman
Journal of Power and Energy Engineering (JPEE) , 2016, DOI: 10.4236/jpee.2016.47004
Abstract:

Materials with a low thermal emittance surface have been used for many years to create reflective insulations that reduce the rate of heat flow across building envelopes. Reflective insulation technology is now being combined with other energy conserving technologies to optimize overall thermal performance. The basis for the performance of reflective insulations and radiant barriers will be discussed along with the combination of these materials with cellular plastic or mineral fiber insulations to form hybrid insulation assemblies. Calculations of thermal resistance for enclosed reflective air spaces and current field data from Southeast Asia will be presented. These data show that reductions in heat transfer across the building enclosure can be effectively reduced by the use of enclosed reflective air spaces and attic radiant barriers. Reflective technology increases the overall thermal resistance of the building enclosure when used to insulate poured concrete structures.

Intuitionistic Fuzzy Groups
M. Fathi,A.R. Salleh
Asian Journal of Algebra , 2009,
Abstract: The aim of this study is to introduce the notion of intuitionistic fuzzy groups based on the notion of intuitionistic fuzzy space. Indeed this approach is a generalization of the notion fuzzy groups based on fuzzy spaces. A correspondence relation between intuitionistic fuzzy groups and both fuzzy and ordinary groups is obtained, also a relation between intuitionistic fuzzy groups and classical intuitionistic fuzzy subgroups is obtained and studied.
Teachers’ Creativity in Posing Statistical Problems from Discrete Data  [PDF]
Effandi Zakaria, Faridah Salleh
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.38201
Abstract: Choosing a quality problem in mathematics is a challenge for many teachers. Teachers cannot rely on textbooks for good problems. They have to be able to pose their own problems in order to promote mathematical thinking among students. This study was conducted to explore the creativity of 175 teachers in terms of fluency, flexibility, and originality in posing statistical problems. Participants consisted of secondary school teachers from twenty schools in Peninsular Malaysia. Teaching experience was ranged from 1 to 33 years. The features of the problems posed by these teachers were also studied. The participants were provided a stimulus, which was a set of ungrouped discrete data, and they were asked to pose as many problems as they could. The posed statistical problems were supposed to promote mathematical thinking and to increase students’ understanding. Findings showed that participants were able to pose a total of 270 (74%) statistical problems within the time given. The mean of the creativity score was 11.08 (s.d. = 6.76). Analysis showed no significant difference in creativity between gender and the value of t = –.346, p = .73, where p > .05. Analysis showed significant differences in the teachers’ creativity scores for three groups of teachers: F (2172) = 6.83, p = .001, p < .05.The results also showed that 115 (31.5%) posed problems focuses on the statistical content measure of central tendency. The study provided expo- sure to the teachers to pose problems that can trigger students’ thinking in solving statistical problems.
Soft Decision Scheme for Multiple Descriptions Coding over Rician Fading Channels
A. H. M. Almawgani and M. F. M. Salleh
International Journal of Image Processing , 2009,
Abstract: This paper presents a new MDC scheme for robust wireless datacommunications. The soft detection making of the MDC scheme utilises thestatistical received data error obtained from channel decoding. The coded bitstream in the system is protected using either the Reed Solomon (RS) or LowDensity Parity Check Codes (LDPC) channel coding scheme. Simulationresults show that this system has some significant performance improvementsover the single description or single channel transmission systems in terms ofsymbol error rate and peak signal-to-noise ratio PSNR. The system with RScodes is 2 to 5 dB better than single description. The system with LDPCchannel codes is 6 to10 dB better than the single description.
FABRICATION OF POLYMER LIGHT EMITTING DIODES WITH ITO/PVK: TPP/ALQ3/AL STRUCTURE
C. C. YAP, M. YAHAYA,MURSYIDAH, M. M. SALLEH
Journal of Sustainability Science and Management , 2007,
Abstract: Polymer light emitting diodes with the configuration of ITO /PVK: TPP/ Alq3/A1 were fabricated using indium tin oxide (ITO) as anode, poly(9-vinylcarbazole) (PVK) as host, tetraphenylporphyrin (TPP) as red dopant, tris (8-hydroxyquinoline) aluminium (Alq3) as electron-transporting green emitter and aluminium (A1) as cathode. The electrical and electroluminescence properties of the devices with various TPP doping concentration by weight in PVK host were investigated and compared with un-doped device. The turn-on voltage of the un-doped device (von= 21v) is larger than doped devices (von = 15 v). Besides, the el emission of the un-doped device originates only from Alq3. As for the doped devices, the light observed was the combination from TPP and Alq3 emission with different ratio. The results show that TPP dopants not only facilitates in transporting the electrons from Alq3 to TPP-doped PVK layer but also tune the emission color of the PLEDs.
Nested PCR for the Rapid Detection of TB from Pleural Fluid at HUKM Malaysia
S.A. Salleh,S. Hussin,M.M. Rahman
Pakistan Journal of Biological Sciences , 2008,
Abstract: The aim of the present study is rapid detection of tuberculosis from pleural effusion of suspected patients. Molecular technique Nested Polymerase Chain Reaction (PCR) was used for the purpose. A total of 67 pleural fluid collected at Hospital University Kebangsaan Malaysia during May 2005 to October 2006 were sent to Microbiology Laboratory enrolled in the study. Detection rate of Mycobacterium tuberculosis in pleural effusion was 0% by acid-fast bacilli (AFB) staining and 1.5% by culture on Lowenstein-Jensen medium. Mycobacterium tuberculosis was detected by PCR in 9% of the cases. PCR of pleural fluid had 19% sensitivity and 96% specificity, compared to AFB staining (0% sensitivity and 100% specificity) and culture (4% sensitivity and 100% specificity). PCR also has 67% Positive Predictive Value (PPV) and 72% Negative Predictive Value (NPV) in detecting Mycobacterium tuberculosis. Culture of pleural fluid has 100% PPV and 71% NPV while AFB staining has 0% PPV and 31% NPV. This preliminary study showed that PCR is a rapid method for detection of Mycobacterium tuberculosis in pleural fluid but its sensitivity is not up the marked.
On Partners and Channel Signal-to-Interference-Plus-Noise Ratio (SINR) in Cooperative Communications
O.A Adeleke,M.F.M Salleh
International Journal of Engineering and Technology , 2012,
Abstract: Cooperative communication or cooperative diversity, as it is sometimes called, is a relatively new technique aimed at improving the channel capacity of wireless networks, through the enhancement of transmit and spatial diversity. This is brought about by an exploitation of the antennas on wireless devices. A major benefit of this technique is that this gain in diversity is achieved without the physical installation of these multiple antennas at the transmitter or even the receiver. In this paper, we attempt to investigate the effect of employing the use of relaying partners on the signal-to-interference-plus-noise ratio (SINR) on each of the channels involved in cooperative cooperation, that is, source-destination, source-relay, relay-destination and source-relay-destination; making use of the amplify-and-forward cooperative diversity scheme. Implementation was also carried out with multiple relays as a means of comparing with a single-relay scenario. The findings show that the SINR with the help of the relaying partner in cooperation is approximately 104 times than that without the help of a relaying partner node.
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