Kesediaan pelajar terhadap kit 'Smart CCTV' bagi pelajar teknologi elektronik di Kolej Vokasional

Penggunaan alat bahan bantu mengajar (ABBM) dalam pengajaran perlu dipelbagaikan bagi memudahkan dan membantu pelajar dari segi kefahaman yang mendalam dalam subjek yang dipelajarinya.Kajian ini ingin membangunkan satu produk Kit ‘Smart CCTV’ sebagai ABBM dan mengkaji persepsi pelajar mengenai kefahaman kepada pelajar terhadap topik Pemasangan Perkakasan Elektronik sistem litar tertutup televisyen (CCTV) dari segi domain kognitif, afektif dan psikomotor bagi pelajar aliran Teknologi Elektronik di kolej vokasional. Reka bentuk kajian ada dua bahagian iaitu reka bentuk pembangunan produk yang menggunakan model ‘Rapid Prototype’dan kajian deskriptif kaedah tinjauan untuk kajian keseluruhan. Analisis kajian ini menggunakan kaedah deskriptif kekerapan, peratusan, skor min dan sisihan piawai yang menggunakan perisian Microsoft Office Excel 2016. Reka bentuk pembangunan produk kit ‘Smart CCTV’ amat sesuai sebagai ABBM. Dapatan analisis bagi persepsi pelajar terhadap penggunaan ABBM keseluruhannya skor min ketiga-tiga domain; kognitif, psikomotor dan afektif, masing-masing mempunyai skor min 3.25, 3.21 dan 3.30, maka ketiga-tiga domain memberikan kesan yang sama terhadap pelajar berkenaan dengan penggunaan ABBM kit ‘Smart CCTV’. Hasil kajian ini diharapakan dapat dijadikan sebagai satu garis panduan kepada guru di kolej vokasional untuk menggunakan ABBM dalam PdP serta panduan kepada pengkaji lain untuk meneruskan kajian berkenaan dengan penggunaan ABBM terhadap pencapaian pelajar

Design of Rotary Machines for Ceiling Fan

As Malaysia climate are hot and humid, ceiling fan become one of the most important electrical machine that should be installed in every house. Unfortunately, there is some energy that does not have being fully utilized from conventional ceiling fan. By using simple conversion of energy, from mechanical energy to electrical energy or vice versa are being applied in this project. Therefore, in order to utilize the energy that being produced by the conventional ceiling fan, a design has being introduced which is combined the motor-generator system using axial configuration. There are some previous technologies of ceiling fan that using other configuration which need some improvement that can be develop using the design that being introduced. Motor-generator system using axial configuration is using one rotor and two stator arrangement which stator part is for motor and generator and rotor part is the combination part for generator and motor

Rice straw as a natural sorbent in a filter system as an approach to bioremediate diesel pollution

Rice straw, an agricultural waste product generated in huge quantities worldwide, is utilized to remediate diesel pollution as it possesses excellent characteristics as a natural sorbent. This study aimed to optimize factors that significantly influence the sorption capacity and the efficiency of oil absorption from diesel-polluted seawater by rice straw (RS). Spectroscopic analysis by attenuated total reflectance infrared (ATR-IR) spectroscopy and surface morphology characterization by variable pressure scanning electron microscopy (VPSEM) and energy-dispersive X-ray microanalysis (EDX) were carried out in order to understand the sorbent capability. Optimization of the factors of temperature pre-treatment of RS (90, 100, 110, 120, 130 or 140 °C), time of heating (10, 20, 30, 40, 50, 60 or 70 min), packing density (0.08, 0.10, 0.12, 0.14 or 0.16 g cm−3) and oil concentration (5, 10, 15, 20 or 25% (v/v)) was carried out using the conventional one-factor-at-a-time (OFAT) approach. To eliminate any non-significant factors, a Plackett–Burman design (PBD) in the response surface methodology (RSM) was used. A central composite design (CCD) was used to identify the presence of significant interactions between factors. The quadratic model produced provided a very good fit to the data (R2 = 0.9652). The optimized conditions generated from the CCD were 120 °C, 10 min, 0.148 g cm−3 and 25% (v/v), and these conditions enhanced oil sorption capacity from 19.6 (OFAT) to 26 mL of diesel oil, a finding verified experimentally. This study provides an improved understanding of the use of a natural sorbent as an approach to remediate diesel pollution

Application of Cogon Grass (Imperata cylindrica) as Biosorbent in Diesel-Filter System for Oil Spill Removal

Imperata cylindrica, often known as cogon grass, is a low-cost and useful sorbent for absorbing oil and optimising processes. The effects of temperature, time, packing density and oil concentration on oil absorption efficiency were investigated and optimised utilising one-factor-at-a-time (OFAT) and response surface methodology (RSM) approaches. Temperature and oil concentration are two important variables in the oil absorption process. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) analysis were used to characterise cogon grass. After treatment and oil absorption, the FTIR method indicated new formation and deformation of functional groups, while SEM revealed changes in the surface and texture of cogon grass, including a roughened and jagged surface. Validation of the RSM model yielded 93.54% efficiency with 22.45 mL oil absorbed at 128 °C temperature and 36 (v/v)% oil concentration while keeping packing density and time constant at 30 min and 0.20 g/cm3, respectively. This study may provide an insight into the usefulness of a statistical approach to maximise the oil absorption of cogon grass as an oil sorbent

Application of Cogon Grass (Imperata cylindrica) as biosorbent in diesel-filter system for oil spill removal

Imperata cylindrica, often known as cogon grass, is a low-cost and useful sorbent for absorbing oil and optimising processes. The effects of temperature, time, packing density and oil concentration on oil absorption efficiency were investigated and optimised utilising one-factor-at-a-time (OFAT) and response surface methodology (RSM) approaches. Temperature and oil concentration are two important variables in the oil absorption process. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) analysis were used to characterise cogon grass. After treatment and oil absorption, the FTIR method indicated new formation and deformation of functional groups, while SEM revealed changes in the surface and texture of cogon grass, including a roughened and jagged surface. Validation of the RSM model yielded 93.54% efficiency with 22.45 mL oil absorbed at 128 °C temperature and 36 (v/v)% oil concentration while keeping packing density and time constant at 30 min and 0.20 g/cm3, respectively. This study may provide an insight into the usefulness of a statistical approach to maximise the oil absorption of cogon grass as an oil sorbent