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Social media use intensity at workplace among human resources executives of a government agency headquarters in Kuala Lumpur, Malaysia
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Determination of deflection basin using pavement modelling computer programs and finite element method
No full textSeveral methods can be used to model pavement structures, namely multi-layered elastic theory (MET), finite element method (FEM), or finite difference method (FDM). In this study, three computer programs, KENLAYER and EVERSTRESS 5.0 which are based on MET, and ANSYS, representing the FEM, are used in Falling Weight Deflectometer (FWD) test on a pavement structure to determine deflection basin. The deflection basin was developed by using the results of vertical deflection from each sensor of an FWD test. In this study, a pavement structure was modelled for three locations of FWD tests, namely CH 200, CH 1450, and CH 2300. Based on the comparative study, all computer programs show good potential in determining deflection basin, with small percentage of Root Mean Square Error (RMSE) of between 1.00% to 4.31% for all models developed by the computer programs and field measurement. In order to obtain a higher accuracy of the FEM, the models considered the dynamic loading, increasing size of model geometry, as well as the reduction of the mesh element sizes. Moreover, changing from static to dynamic loading led to the reduction of percentage in RMSE for CH 200 from 2.41% to 0.94%. Decreasing size of closer elements of loading region also results in lower percentages of RMSE, calculated at 4.21% to 3.63% and 1.20% to 1.18% for CH 1450 and CH 2300, respectively. FEM, therefore, is found to be the best method for determining deflection basin of FWD in comparison to other MET computer programs
Effects of convective boundary conditions, radiation, and heat transfer on magnetohydrodynamic stagnation point nanofluid flow past a stretching/shrinking sheet
No full textA steady flow of a nanofluid stagnation point magnetohydrodynamic (MHD) over a permeable shrinking sheet with convective boundary conditions and radiation effects were explored. The governing partial differential equations were converted by using similarity transformation into a system of non-linear ordinary differential equations (ODEs). The boundary value problem solver in MATLAB software was selected to solve the ODEs. The roles of physical parameters on the skin friction coefficient and local Nusselt number as well as velocity, temperature, and nanoparticle volume fraction profiles were described in graphs and addressed in detail. Findings showed that the suction strength improved the skin friction coefficient and heat transfer rate as the sheet was shrunk. Meanwhile, the study showed that the nanoparticle volume fraction and thermal boundary layer thickness were increased in the presence of radiation
Angular kinematics study on parachute landing activity for professional and amateur parachutists of Malaysian military using video processing technique
No full textThis study focusses on the angular kinematics analysis, namely an- gular displacement, angular velocity, and angular acceleration among professional and amateur paratroopers of Malaysian military using video processing technique. They are three professional and eighteen amateur parachutists who are Malaysian army participated in this study. The video data was captured based on the event "before their foot touched the ground" using three GoPro cameras at 60 fps (frame per second). The angular kinematics data has been analysed using the Quintic Biomechanics Software v26. The study of angular kinematics can help to find the optimum flexion angle and the angular displacement for the hip, knee and ankle joint during landing. The results showed that professional parachutists bent their hip and knee and flexed the balls of their feet more during landing. This produced change in angular displacement, angular velocity and angular acceleration. The optimum angular displacement are 1.31 rad (hip flexion), 0.79 rad (knee flexion) and 0.94 rad (ankle flexion). The optimum angular velocity are 0.03 rads?1 (hip flexion), 0.27 rads?1 (knee flexion) and -4.19 rads?1 (ankle flexion). The optimum angular acceleration are -35.17 rads?2 (hip flexion), 55.26 rads?2 (knee flexion) and -22.33 rads?2 (ankle flexion). The optimum angular kinematics parameters can be served as guidelines and reference for the amateur parachutists to perform the optimum landing and minimize the injury
Dual modality tran-admittance mammography and ultrasound reflection to improve accuracy of breast cancer detection
No full textCancer and breast tissue have a very high electrical impedance ratio, so imaging based on impedance can produce high contrast. It is very useful for the early detection of breast cancer. Trans-admittance mammography (TAM) is a modality to detect breast cancer based on impedance. The weakness of TAM is that it can only produce a projection image so that the volume and ratio of cancer to breast tissue cannot be obtained at once. The ratio of anomaly and volume is very important to be determined properly because it is related to the stage and type of cancer. TAM shortcomings can be overcome if anomalous volume information is known precisely. The ultrasound reflection modality can produce information about an anomaly depth and volume correctly. Combining TAM and ultrasound reflection data is expected to provide promising results. The study was conducted to prove the hypothesis by creating a breast phantom composed of gelatin, agar, graphite, glycerol, and distilled water to represent the electrical and acoustic physical properties of cancer and breast tissue. The results showed that the TAM data was only able to produce information about transverse position accurately, while the depth was less accurate. Acoustic devices can produce transverse position information, depth, and volume precisely. The dual-modality of TAM and ultrasound reflection can produce information about the depth position, volume, and the ratio anomaly to reference conductivity accurately
Penggunaan bahan bantu mengajar berteknologi dalam pengajaran guru tahfiz Model Ulul Albab (TMUA)
No full textProgram Tahfiz Model Ulul Albab (TMUA) telah dilaksanakan mulai tahun 2014 di dalam kurikulum sekolah menengah Kementerian Pendidikan Malaysia (KPM). Namun hasil laporan penarafan pelaksanaan program TMUA tahun 2017 menunjukkan terdapat beberapa kelemahan dalam pelaksanaan program ini antaranya penggunaan Bahan Bantu Mengajar (BBM) berteknologi kurang mendapat perhatian guru tahfiz dalam pengajaran mereka. Penggunaan BBM berteknologi telah terbukti dalam meningkatkan keberkesanan pengajaran guru di dalam bilik darjah. Artikel ini meninjau pola penggunaan BBM berteknologi dalam kalangan guru bagi program TMUA serta persepsi guru terhadap penggunaan BBM berteknologi dalam kalangan guru bagi program TMUA berdasarkan Latihan Dalam Perkhidmatan (LADAP) Pembelajaran Abad Ke-21 (PAK21). Seramai 30 orang guru telah terlibat sebagai responden dalam artikel ini. Dapatan menunjukkan pola penggunaan BBM berteknologi adalah sederhana hingga tinggi namun tidak terdapat perbezaan dalam kalangan guru yang mengikuti LADAP PAK21 terhadap penggunaan BBM berteknologi. Kesimpulannya, guru mempunyai persepsi yang positif terhadap kepentingan penggunaan BBM berteknologi namun tahap penggunaannya masih di peringkat sederhana. Ini menunjukkan bahawa kesedaran dan galakan dalam penggunaan BBM berteknologi dalam kalangan guru-guru tahfiz perlu dipertingkatkan.Kesemua 14 fungsi rundingcara ini memberi impak terhadap pembangunan institusi keluarga terutamanya bagi mengukuh hubungan dalam perkahwinan