Universiti Teknologi Mara (Pulau Pinang)
  • Permatang Kuching, Pulau Pinang, Malaysia
Recent publications
Needs analysis for language courses has to be carried out continuously to keep up with global changes and the needs of learners. This mixed-method study aims to describe the subjective and objective needs of the Mandarin learners in Universiti Malaysia Sarawak (UNIMAS), Malaysia, and to check if these needs correspond with each other. Targetting at 120 learners and two instructors, a questionnaire survey was distributed, and complemented by qualitative data derived from focus group interviews. Result shows that learners’ subjective needs correspond with objective needs for motivational orientation, textbook, and cultural exposure. Statistically insignificant differences were found in the expected skills to learn, lecture-activities ratio, and teaching-learning activities. The study concludes that flexibility, student-centeredness and practicality are elements to look into for course improvement. Future research can explore learners’ needs in mastering writing skill, as well as the needs differences among learners across different levels. The study complements the understanding and knowledge of needs analysis in regard to Mandarin learning outside of China.
Malaysia’s rapid economic and demographic development have placed negative pressure on its water supplies and the quality of the Juru River, which is close to the nation's capital and its major source of water. Healthy aquatic ecosystems are supported by physicochemical properties and biological diversity. This study evaluated the anthropogenic impacts on aquatic biodiversity, especially plankton, fish, and macrobenthos, as well as the water quality of the Juru River in the Penang area. Aquatic biodiversity and river water parameters were collected from ten sampling stations along the Juru River. Seven variables were used to assess the physicochemical environment: pH, temperature, total suspended solids (TSS), salinity, dissolved oxygen (DO), biochemical oxygen demand (BOD), and chemical oxygen demand (COD). At each sampling station, the total number of plankton, fish, and macrobenthic taxa were counted and analyzed. The relationships between the physicochemical parameters and aquatic biodiversity were investigated with biotypological analysis, principal component analysis, hierarchical cluster analysis, and linear regression analysis. These analyses showed that the richness and diversity indices were generally influenced by salinity, temperature, TSS, BOD, and pH. The data obtained in this study supported the bioindicator concept. The findings, as they related to scientifically informed conservation, could serve as a model for Juru River management, as well as for river management throughout Malaysia and other tropical Asian countries.
This study fabricated tantalum (Ta)-doped titanium dioxide with a unique nanorod-assembled actinomorphic-flower-like microsphere structured film . The Ta-doped TiO2 actinomorphic-flower-like microsphere (TAFM) was fabricated via the solution immersion method in a Schott bottle with a home-made improvised clamp. The samples were characterised using FESEM, HRTEM, XRD, Raman, XPS, and Hall effect measurements for their structural and electrical properties. Compared to the undoped sample, the rutile-phased TAFM sample had finer nanorods with an average 42 nm diameter assembled to form microsphere-like structures. It also had higher oxygen vacancy sites, electron concentration, and mobility. In addition, a reversed double-beam photoacoustic spectroscopy measurement was performed for TAFM, revealing that the sample had a high electron trap density of up to 2.5 μmolg−1. The TAFM showed promising results when employed as the resistive-type sensing film for a humidity sensor, with the highest sensor response of 53,909% obtained at 3 at.% Ta doping. Adding rGO to 3 at.% TAFM further improved the sensor response to 232,152%.
This paper presents a modified fatigue life model of the Basquin equation using the stress parameter of the magnetic flux leakage signal. Most pipeline steels experience cyclic loading during service and the influence of the load history makes assessing fatigue behaviour more difficult. The magnetic flux leakage signal’s response to a uniaxial cyclic test of API X65 steel was measured with eight levels of ultimate tensile stress loads. The influence of dH(y)/dx on fatigue failure was the main concern in this study, the aim being to represent localised stress parameters in the modified Basquin equation. Both fatigue lives, experimental and predicted from the modified Basquin equation, were validated through reliability analysis, producing a 60% value when approaching 1.8 × 105 cycles. The fatigue data from the experiment produced a higher mean-cycle-to-failure value than the prediction data, with slightly different values of 3.37 × 105 and 3.28 × 105. Additionally, the modified Basquin equation’s predicted and the experimental fatigue lives were found to have a high R2 correlation value of 0.9022. The Pearson correlation also showed a good relationship between the fatigue lives, with an r value of 0.9801. Finally, the modified Basquin equation based on dH(y)/dx signals provided an accurate and alternative method for durability assessment.
Purpose: The study examines their responses to questions about confidence in purchasing products, product-slogan suitability and product purity from the perspective of Muslims. Design/Methodology/Approach: The present quantitative study was conducted based on the data collected from 100 young Muslim consumers recruited from the population of undergraduate students at a university in Malaysia to investigate their perception towards Islamic brand slogans. Findings: The results show that Islamic slogans can influence Muslim customers’ trust in purchasing goods in the market for a variety of reasons and this includes religious piety, a product’s conformity to religious doctrine, and the slogan’s use of semantically acceptable words. Furthermore, the Islamic brand slogans written in the Jawi letters are also found to be an appealing factor for the Muslims since Jawi resembles Arabic script. The data overall seem to suggest that Islamic brand slogans can influence Muslims in making decisions with regard to product purchases. Implications/Originality/Value: The study could help people gain a better understanding of how Islamic branding is used and how Islamic slogans can affect consumers' purchasing decisions and perceptions of product purity.
The unexpected progressing demand in most power system in the world has led to voltage decay phenomenon. This leads the system to operate below the acceptable voltage limit. Under voltage load shedding (UVLS) has been acceptably recognized as the suitable remedial action to alleviate the voltage decay, which consequently causes voltage insecurity condition. Nevertheless, UVLS is the last option. Thus, a robust optimization technique would be the pre-requisite to optimal location and sizing to ensure a reliable and effective approach; without having to victimize the prioritized areas. This paper presents an optimal UVLS using a newly develop optimization technique termed as Integrated Chaotic Clonal Jaya Evolutionary Programming (ICCJEP). This study addresses a pre-developed voltage stability index as the indicator to voltage security improvement, which needs to be minimized. Validation under several combinations of UVLS schemes on the IEEE 30- Bus RTS indicated that the optimal UVLS can improve voltage security in power system indicated by the reduction of FVSI value as the index.
Diesel engines are one of the most popular reciprocating engines on the market today owing to their great thermal efficiency and dependability in energy conversion. Growing concerns about the depletion of fossil resources, fluctuating prices in the market, and environmental issues have prompted the search for renewable fuels with higher efficiencies compared with conventional fuels. Fuel derived from vegetable oils and animal fats has comparable characteristics to diesel fuel, but is renewable, despite being manufactured from various feedstocks. Nevertheless, the direct use of these fuels is strictly prohibited because it will result in many issues in the engine, affecting engine performance and durability, as well as emissions. To make biofuels as efficient as fossil fuels, it is essential to alter their characteristics. The use of emulsification techniques to obtain emulsified biofuels is one of the many ways to modify the fuel characteristics. Emulsification techniques allow for a decrease in viscosity and an increase in atomisation during injection. To date, emulsification techniques have been studied less thoroughly for use with vegetable oils and animal fats. This article will discuss the preparation and characterisation of emulsified biofuels made from vegetable oils and animal fats. This current paper reviewed research studies carried out on different emulsification techniques for biofuels used in diesel engines.
The PM10 concentration is subject to significant changes brought on by both gaseous and meteorological variables. The aim of this research was to explore the performance of a hybrid model combining the support vector machine (SVM) and the boosted regression trees (BRT) technique in predicting the PM10 concentration for 3 consecutive days. The BRT model was trained by utilizing maximum daily data in the cities of Alor Setar, Klang, and Kuching from the years 2002 to 2017. The SVM–BRT model can optimize the number of predictors and predict PM10 concentration; it was shown to be capable of predicting air pollution based on the models’ performance with NAE (0.15–0.33), RMSE (10.46–32.60), R2 (0.33–0.70), IA (0.59–0.91), and PA (0.50–0.84). This was accomplished while saving training time by reducing the feature size given in the data representation and preventing learning from noise (overfitting) to improve accuracy. This knowledge establishes the foundation for the development of efficient methods to prevent and/or minimize the health effects of PM10 exposure on one’s health.
Attaining a generalized porosity measurement based on the conventional measuring methods is unfeasible due to thin and complex layers on Gallium Nitride (GaN) film. Therefore, there is an impetus for developing a method of estimating general fabric porosity via image processing techniques. This study is aimed to investigate and validate a new technique for extracting the GaN porosity in terms of morphological and structural characteristics using an image processing technique. The anodization on porous GaN films is prepared by using direct current photo-assisted electrochemical etching (DC-PECE) etching technique. The quantitative structural characteristics based on mathematical morphology is analyzed using Field Emission Scanning Electron Microscopy (FESEM) and Atomic Force Microscopy (AFM). To validate the method, the evaluation of porous GaN quality is performed through a non-destructive investigation of its nanostructures using adapting image analysis techniques. Porosity of the structures obtained by calculating the areas occupied by the pores. The quantitative results were obtained and showing good agreement between two modes of measurement and calculation (percentage porosity and pore depth) based on the image-processing data with 91 % and 78 % correlation coefficient.
Different industries such as petroleum refineries, food processing, restaurants, marine produce oily wastewaters with widely variable compositions and high pollutant levels. Studies have shown that efficient oil removal is achieved with electrocoagulation, EC, which is considered a new and effective wastewater treatment method that combines coagulation, flotation, sedimentation, and electrochemistry. During the EC process, metal ions are dissociated by applying an electric current, which hydrolyzes them and generates flocs to remove pollutants from the wastewater. The current study provides an overview of emerging electrochemical technology for oil-containing wastewater treatment with an overview of the origin and characteristics of oily wastewater. The treatment techniques for oily wastewater established thus far are briefly discussed. This review focuses on oil removal from polluted water by the EC process. Additionally, EC process efficiency, statistical research, and present challenges were discussed and reviewed. Some recommendations for future improvement trends of the EC method are presented.
In this work, we have to investigate the relationship the factor that interfere the focus study and academic achievement for the physics subject and the student performance and what are the preferable tool for the learning process. We have distributed a google form questionnaire to 48 students who have registered for the PHY443 course. The statistical analysis on the findings was evaluated by using the Statistical Package for Social Science (SPSS). We have discovered that messaging apps like WhatsApp and Telegram can support students' academic progress and also boost their involvement in classroom discussions. WhatsApp and Telegram are suitable platforms since they utilize less bandwidth to address the problem of low connection among students. Using programmes like Telegram may be an effective teaching strategy to include students in the teaching and learning process at a school or institution.
This report presents the effect of diamond cutouts and fibre orientations on the failure behaviour of Graphite Epoxy and Glass Epoxy composite laminates. Two important approaches were used in this study which were numerical validation and failure analysis. For numerical justification, simulated results were compared with the analytical value calculated from Wolfram Alpha website. It was observed that an acceptable difference occurred, with the highest percentage error of 0.313% and 0.339% in x and y directions, respectively. Moreover, for the failure analysis, its simulation was conducted using plates with and without the diamond cutouts, using maximum stress theory as the failure criteria. The outcomes showed that the plate with cutout had considerably lower strength as compared to the one without it. However, it was also observed that plate with cutout was far less affected when the fibre orientation was varied, as compared to the without cutout type.
The Final Year Project (FYP) is one of the required capstone courses which has to achieve several program outcomes (POs) per the requirement of the Engineering Accreditation Council (EAC) and industries’ needs. The POs demonstrate technical/cognitive knowledge, psychomotor skills and affective abilities in students upon completing the course. In addressing the POs that are assessed through different sets of assessment in evaluating students’ performance, a systematic mechanism in tracking performance outcomes is needed. This will ensure Continual Quality Improvement (CQI) and enhance the programme's quality management system (QMS). Therefore, “eFYP” was developed as a data management tool to analyse the students’ performance from all evaluators against different assessment rubric sets and comply with the university's evaluation system. Excel templates that have been programed with visual basic language has developed that can integrate between DataCollector and DataAnalyser system. The eFYP has a unique capability to manage extensive data in a short duration with low storage requirement and high accuracy with security feature. Thus, it has a great potential to be utilised as a data compiling tool in any program. In addition, the eFYP will ensure the students’ results can be retrieved in without an error, fast and easy.
Soil stabilization is a common method used to improve the soil properties in construction site. This study was conducted to evaluate the performance of coconut fiber as a reinforced material to strengthen silty soil. Soil sample was mixed with coconut fiber at different percentage; 0%, 0.5%, 1.0% and 1.5% of the total soil weight at different length; 2cm and 5cm. In order to achieve the aim of this study, standard Proctor test and unconfined compression test (UCT) were carried out. The findings of this study indicate that the unconfined compressive strength (UCS) of the soil reinforced with 2cm fiber increases with increment of the coconut fiber where 1.5% of fiber content gives the highest compressive strength of 550kN/m². However, the UCS of soil reinforced with 5 cm length of coconut fiber shows the optimum value of 379kN/m² is at 1.0% fiber content. It seems that shorter fiber gives better performance of UCS due to ease of mixing hence improve the soil density and reduces the potential of compressibility effect. Therefore, it proved that coconut fiber is an effective material to improve the strength performance of silty soil.
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345 members
Lyly Nyl Ismail
  • Faculty of Electrical Engineering
Syahrul Fithry Senin
  • Faculty of Civil Engineering
Nor Salwa Damanhuri
  • Faculty of Electrical Engineering
Suraya Sulaiman
  • Faculty of Pharmacy Bertam Campus
Siti Hafizan Hassan
  • Faculty of Civil Engineering
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Universiti Teknologi MARA Cawangan Pulau Pinang, 13500, Permatang Kuching, Pulau Pinang, Malaysia