4 research outputs found

    Pembangunan web E-Pembelajaran menggunakan elemen video dalam topik ‘Work And Energy’ berasaskan teori konstruktivisme sosial

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    Keperluan mengintegrasikan ICT dalam proses pengajaran dan pembelajaran pada semua peringkat persekolahan kini semakin mendesak. E-Pembelajaran berasaskan web telah dilihat sebagai satu alternatif yang berkesan dalam proses pengajaran dan pembelajaran kerana kaedah ini mampu mewujudkan pembelajaran berpusatkan pelajar yang terarah kendiri, kadar kendiri dan akses kendiri. Walaubagaimanapun, perkembangan pesat dunia internet pada hari ini mewujudkan aliran baru dalam penyampaian informasi iaitu berbentuk Flash Video yang lebih mudah dan cepat diakses. Projek ini dibangunkan dengan memperkenalkan E-Pembelajaran berasaskan Video On Demand dengan mengekalkan konsep pembelajaran secara Sosial Konstruktivisme. Bahan E-Pembelajaran yang bertajuk “Work and Energy” bagi subjek Fizik Tingkatan Empat ini menyediakan aktiviti pembelajaran secara “Tutorial”, “Video”, “Quiz”, “Forum” dan “Extra Notes” di samping aktiviti tertentu yang membenarkan pengguna berinteraksi secara spontan terhadap bahan pembelajaran. Sistem E-Pembelajaran yang dibangunkan ini membenarkan pengguna untuk berkongsi bahan-bahan berbentuk video dan nota tambahan dengan kawalan pihak pentadbir. EPembelajaran ini diharapkan juga dapat dijadikan bahan bantu mengajar(BBM) yang efektif kepada guru-guru sebagai satu tarikan kepada pelajar untuk lebih meminati subjek fizik

    OpenFOAM implementation for the study of streamwise vortex-induced vibration-based energy harvester for sensor networks

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    The study of streamwise vortex induced vibration has reached a level of maturity that allows it to be harnessed to generate power. However, studies have primarily concentrated on the variables that measured through point-based instruments. This severely limits our understanding of the fluid forcing mechanism that results in the vibration of the elastically supported bluff body. We proposed the usage of computational fluid dynamics: the open source C++ libraries of OpenFOAM. To implement this successfully to the streamwise vortex-induced vibration problem, which involves near-wall fluid-structure interaction, we explored the method of dynamic mesh handling in OpenFOAM for six degrees of freedom motion of a rigid body fully submerged in fluid. Finally, we argued for the usage of arbitrarily coupled mesh interface to overcome the problem of severely distorted mesh in tight gaps between two walls. We run a short simulation to test this setup and found that the case runs uninterrupted, unlike its former counterpart that relies solely on cell displacement diffusion, suggesting the potential success of a further converged solution of the setup when running on a more powerful machine

    Numerical Simulation of Drying Process within a Novel Rotary Drying Machine for Palm Oil Sludge

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    This study investigated how to model a centre-offset annular rotary drum using OpenFOAM and the meshing software GMSH. The diameter of the outer cylinder is 600 mm, diameter of the inner cylinder 200 mm, the centre-offset mm, and rotation rate rpm. When the centre-offset is zero, the quality of mesh is preserved as the drum rotates. Introduction of the offset causes the mesh to be deformed to the point of being unusable as the drum is rotated. The reason was found to be the fixed nodes adjacent to the walls of the outer and inner cylinder. These nodes only respect the motion of the wall they are adjacent to. To circumvent this, we separated the inner volume of the rotary drum to allow the implementation of an OpenFOAM dynamic mesh handling scheme called arbitrary mesh interface (AMI). Implementing AMI allows the quality of the mesh to be kept even when the inner cylinder is rotating under nonzero-offset conditions. This is because AMI permits the sliding of non-conforming meshes next to each other. This preserves the quality of the mesh and secures a reliable and reproducible dynamic mesh motion for the implementation of the drying process in the future
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