Universiti Malaysia Perlis or UniMAP is in the northern most part of the Malaysian peninsula, less than 35 km from the Thailand border in the town of Arau, Perlis. UniMAP is a government-funded Malaysian public university. Wikipedia.
Reshak A.H.,University of West Bohemia |
Reshak A.H.,University Malaysia Perlis
Physical Chemistry Chemical Physics | Year: 2014
Tantalum oxynitride has been studied as an active photocatalyst under visible light, using a full potential linearized augmented plane wave method within the framework of density functional theory. The electronic and optical properties of TaON are calculated using local density approximation (LDA), generalized gradient approximation (GGA), Engel-Vosko generalized gradient approximation (EVGGA) and the modified Becke-Johnson (mBJ) potential approximation to describe the exchange-correlation potential. The calculated band gap value obtained by the mBJ approximation approach (2.5 eV) is very close to the experimental result (2.5 eV). We found that hybridization among the Ta-d, O-p and N-p states results in the formation of a covalent bond between Ta-N and Ta-O. The calculated optical properties confirm that the TaON is an active photocatalyst under visible light irradiation. TaON has a high dielectric constant and the components show anisotropy in the energy range between 3.0 eV and 10.0 eV. A high refractive index of 2.47 at 632.8 nm is obtained which shows better agreement with the experimental value (2.5 at 632.8 nm) than previous results. This journal is © the Partner Organisations 2014.
University Malaysia Perlis, King Abdulaziz City for Science and Technology | Date: 2014-07-09
A method of soil stabilization includes mixing a geopolymer material with an alkaline activator and adding 5 to 30 percent by weight of the mixture to a soil.
King Abdulaziz City for Science, Technology and University Malaysia Perlis | Date: 2013-10-02
A method of coating a geopolymer onto an article that is made of high heat applicable material, the method comprising the steps of providing geopolymer paste prepared from reacting fly ash-derived pozzolanic material with an alkaline activator solution; coating the geopolymer paste onto the article; curing the coated article; and sintering the cured article at a temperature ranging from 100C to 1500C.
University Malaysia Perlis, King Abdulaziz City for Science and Technology | Date: 2013-02-11
The invention is related to a building block for use in interlocking with a plurality of similar building blocks for constructing a building. The building block includes a front face, a rear face, an upper face, a lower face, a first end and a second end. The building block also includes at least one substantially vertical hollow (web) and at least one substantially horizontal channel, wherein the at least one horizontal channel is disposed along one of the upper face and the lower face. In addition, each of the first end and the second end includes at least one header face, wherein at least one the header face can be one of a substantially planar face, a male header face and a female header face. Each of the male header face and the female header face includes one or more patterns for interlocking.
University Malaysia Perlis, King Abdulaziz City for Science and Technology | Date: 2014-08-04
A geopolymer brick fabrication system comprising a mixer (100) having a tank (101) which comprises a closeable bottom outlet (102) and an inner surface coated with saturated polyester resin that is resistant against corrosive geopolymeric material for receiving the geopolymer raw material to be mixed by shaft (103) driven by a spindle motor (104) a moulding section (200) to receive the mixed geopolymer raw material through a slanted conveyer (105) upon opening of the closeable outlet (102) for shaping the mixture under pressure inside a mould (201) to obtain a geopolymer brick and a curing section (300) having a moving platform (301) across a curing chamber (302) to simultaneously cure and transport the brick thereon.
University Malaysia Perlis, King Abdulaziz City for Science and Technology | Date: 2016-09-07
An anti-radiation concrete comprises a geopolymer, a mixture of at least two alkaline activators, fine aggregate, and coarse aggregate from high density metal-containing rocks.
King Abdulaziz City for Science, Technology and University Malaysia Perlis | Date: 2015-11-25
An anti-radiation concrete comprising a geopolymer is described. In an implementation, the anti-radiation concrete comprises a mixture of at least two aqueous alkaline activators, fine aggregate, and coarse aggregate from high density metal-containing rocks.
Perumal V.,University Malaysia Perlis |
Hashim U.,University Malaysia Perlis
Journal of Applied Biomedicine | Year: 2014
The ability to detect pathogenic and physiologically relevant molecules in the body with high sensitivity and specificity offers a powerful opportunity in the early diagnosis and treatment of diseases. Early detection and diagnosis can be used to greatly reduce the cost of patient care associated with the advanced stages of many diseases. However, despite their widespread clinical use, these techniques have a number of potential limitations. For example, a number of diagnostic devices have slow response times and are burdensome to patients. Furthermore, these assays are expensive and cost the health care industry billions of dollars every year. Therefore, there is a need to develop more efficient and reliable sensing and detection technologies. A biosensor is commonly defined as an analytical device that uses a biological recognition system to target molecules or macromolecules. Biosensors can be coupled to a physiochemical transducer that converts this recognition into a detectable output signal. Typically biosensors are comprised of three components: (1) the detector, which identifies the stimulus; (2) the transducer, which converts this stimulus to a useful output; and (3) the signal processing system, which involves amplification and display of the output in an appropriate format. The goal of this combination is to utilize the high sensitivity and selectivity of biological sensing for analytical purposes in various fields of research and technology. We review here some of the main advances in this field over the past few years, explore the application prospects, and discuss the issues, approaches, and challenges, with the aim of stimulating a broader interest in developing biosensors and improving their applications in medical diagnosis. © 2013 Faculty of Health and Social Studies, University of South Bohemia in Ceske Budejovice.
Al-Douri Y.,University Malaysia Perlis
Procedia Engineering | Year: 2013
Electrochemical deposition method is used to prepare GaN nanostructure. The morphological studies using scanning electron microscopy (SEM), photoluminescence (PL) the refractive index and optical dielectric constant are investigated experimentally and theoretically, respectively. These investigations are found to be dependent on the growth time. The nanosize effect is noticed for UV detectors applications. The calculated results are in agreement with experimental and theoretical data. © 2013 The Authors.
Murugappan M.,University Malaysia Perlis
Proceedings of the 2011 International Conference on Pattern Analysis and Intelligent Robotics, ICPAIR 2011 | Year: 2011
Emotion is one of the most important features of humans. Without the ability of emotions processing, computers and robots cannot communicate with human in natural way. In this paper we presented the classification of human emotions using Electroencephalogram (EEG) signals. EEG signals are collected from 20 subjects through 62 active electrodes, which are placed over the entire scalp based on International 10-10 system. An audio-visual (video clips) stimuli based protocol has been designed for evoking the discrete emotions. The raw EEG signals are preprocessed through Surface Laplacian filtering method and decomposed into five different EEG frequency bands (delta, theta, alpha, beta and gamma) using Wavelet Transform (WT). We have considered three different wavelet functions namely: "db4", "db8", "sym8" and "coif5" for extracting the statistical features from the preprocessed signal. In this work, we have investigated the efficacy of emotion classification for two different set of EEG channels (62 channels & 24 channels). The validation of statistical features is performed using 5 fold cross validation and classified by using linear non-linear (KNN K Nearest Neighbor) classifier. KNN gives a maximum average classification rate of 82.87 % on 62 channels and 78.57% on 24 channels, respectively. Finally we present the average classification accuracy and individual classification accuracy of KNN for justifying the performance of our emotion recognition system. © 2011 IEEE.