Status program pembelajaran di kalangan saudara baru: satu kajian kes di negeri Melaka

The study aimed to identify the perception of respondents on the status of learning program that they have undergone. The study involved 60 Muslim converts and three officers of an Islamic institution. Results showed that the majority of respondents were of Chinese with Buddhism as the original religion, converted to Islam at the average age of 25.8 years, and their present age was at an average of 45.2 years. A total of 76% of respondents were women. As a whole the respondents perceived that the learning program was satisfactory. However, some areas need to be looked into seriously such as the situations in the class, the capability of teachers in using multiple languages in teaching, and several aspects of learning contents. Three problems related to learning program for the converts were identified, namely, the perception of respondents that Balai Islam is the only place to refer to when problems arise, employment status of officers and the inadequacy of curriculum

Heat Transfer Perfomance Of A Synthetic Jet Generated By Diffuser-Shaped Orifice

Synthetic jet impingement cooling has been Identified to be an advanced cooling technique in a variety of applications such as turbine blade cooling, paper drying, and electronic cooling. The high heat removal capabilities with a simple construction of the device, demonstrate the advantage of synthetic jet compared to other methods. In the present work, the 3D numerical simulation using computational fluid dynamics(CFD) is carried out to predict the heat transfer performance of synthetic jet produced by speaker actuator with the diffuser-shape orifice. Numerical predictions are made for an orifice diameter of 6 mm with several opening angles. The excitation frequency of the speaker diaphragm Is fixed at 100 Hz. Three vibration amplitude are used to investigate the effect of the different velocity of synthetic jet. The results showed that the opening angle of 90" is better than 45" and the heat transfer enhancement using a diffuser shaped orifice Is more significant at a higher vibration amplitude. Also, the increment of vibration amplitude more than 0.6mm may not increase the cooling performance of synthetic jet

Experimental Investigation On A Desiccant Silica Bed for Dehumidification

Energy demand Is getting higher from time to time all over the world especially in Malaysia. In order to cope with energy cost and climate change that taking place to achieve the thermal comfort, alternative cooling methods should be placed to reduce consumption of energy. Desiccant cooling technique Is one of the promising alternative method, avoids the refrigerants use and eliminate effect on the ozone layer. This study focused on single layer hollow silica gel bed dehumidification ability as the solid desiccant material under variable air velocity between 1 ms-1 to 5 ms-1. Experimental Investigation concluded that moisture adsorption ability Is Increased respect to air velocity for hollow desiccant arrangement for 1 ms-1to 2.1 ms-1 range. However, 2.1 ms-1 to 5 ms-1 showed steep decrease in moisture adsorption. 5 ms-1 air velocity Illustrated 10.5 times lower dehumidification than 3.7 ms-1

Kaedah Susur dan Lantun untuk Masalah Pengaturcaraan Linear Dua dan Tiga Dimensi

In this article, a simple preliminary method called Bounce and Explore Method for solving linear programming problems is presented. To date, several methods for solving this problem have been published besides the widely known simplex method

Program pembangunan kepimpinan meningkatkan pemindahan latihan dalam Tentera Darat Malaysia: kajian empirikal

Tujuan kajian ini adalah untuk mengukur perhubungan di antara program pembangunan kepimpinan dengan pemindahan latihan. Kaedah tinjauan telah digunakan menerusi borang soal selidik yang diedarkan kepada para pemimpin tentera darat yang bertugas di Semenanjung Malaysia. Analisis model laluan Smart Partial Least Squares (SmartPLS) telah dilaksanakan untuk menguji hipotesis-hipotesis kajian dan keputusan pengujian ini menunjukkan tiga penemuan penting; pertama, kandungan kursus mempunyai perkaitan yang positif dan signifikan dengan pemindahan latihan. Kedua, peranan jurulatih mempunyai perkaitan yang positif tetapi tidak signifikan dengan pemindahan latihan. Ketiga, sokongan pengurusan mempunyai perkaitan yang positif dan signifikan dengan pemindahan latihan. Dapatan ini mengesahkan bahawa kandungan kursus dan sokongan pengurusan telah bertindak sebagai pemboleh ubah peramal yang penting kepada pemindahan latihan. Sebaliknya, peranan jurulatih tidak berupaya bertindak sebagai pemboleh ubah peramal yang penting kepada pemindahan latihan di organisasi kajian. Justeru itu, artikel ini turut menghuraikan perbincangan, implikasi dan kesimpulan kajian

Thermo-Hydraulic Performance of Heated Tube with Twisted Delta Winglet Swirler Insert: A Numerical Simulation

Among the various methods for enhancing heat transfer in a heat exchanger, a passive method of inserting a continuous swirler inside a heated tube provides a secondary flow along the fluid that reduces the thickness of the thermal boundary layer, thus increasing the efficiency of convection heat transfer performance. The research’s primary goal is to conserve energy, materials, and money by operating efficient heat exchanger equipment. However, the continuous swirler along the fluid flow creates a persistent obstruction, which amplifies the friction factor and increases the working fluid’s energy loss. As a result, this research presented the twisted delta winglet swirler (TDWS), a new design of a decaying swirler that uses delta winglets twisted to 180° to produce a swirling flow along the tube. The swirler comprises four twisted delta winglets arranged in a circle with a diameter 6% smaller than the tube and a length of L/D=2.2. It was placed at the entrance to a heated tube test section with a diameter of 0.016 m and a length of L/D=93.75. The Reynolds Stress Model was used to simulate the flow domain with a water-ethylene glycol mixture was chosen as the working fluid. TDWS transformed the uniform inlet flow from potential energy to high kinetic energy, resulting in a high intensity of swirling flow downstream of the circular tube up to L/D=46.88 before decaying and reaching a steady state. Compared to other decaying swirlers, TDWS obtained one of the lowest relative friction factors, 1.36, with this flow. The maximum global relative Nusselt number increased by only 11% because this value considered the area where the flow reached a steady state. Since the TDWS is a decaying swirler, the thermal-hydraulic performance reached unity along the tube. However, the optimal performance of TDWS in the plain tube with a length of L/D=93.75 can be found if the dimension or geometric configuration of the TDWS is modified, or two or more TDWS may be placed in an array orientation

Numerical Simulation of Heat Transfer Performance of Water: Ethylene Glycol Mixture (W:EG) Through Turbine-Like Decaying Flow Swirler

The propeller-type swirler has been mentioned several times in the literature as one of the decaying flow swirlers designed to improve heat transfer performance while maintaining a low friction factor. However, the distance travelled by swirling flow varies according to the swirler’s design configuration. As a result, the purpose of this paper is to investigate the heat transfer performance and friction factor of a new turbine-like decaying flow swirler (TDS). The distance traversed and decays downstream the tube by the created swirling flow will then be determined. The TDS is a rigid turbine or compressor consist of four twisted blades at 172.2° set at the entrance of a fully developed 1.5 m tube with a dimensionless length (L/D) of 93.75. A 60:40% water and ethylene glycol mixture was employed as a working fluid for the turbulent flow with Reynolds numbers ranging from 4583 to 35,000. The results indicate that the maximum relative heat transfer is 1.16 and the highest relative friction factor is 1.47 at the lowest Reynolds number tested. For Reynolds numbers less than and equal to 10,136, the thermal hydraulic performance achieved unity. The obtained relative heat transfer is deemed to be poor in comparison to several publications. The swirl flow finally entirely decays after L/D = 70.32 after being visualised through the vortex core and cross-sectional plane of the tube, contributing to a reduced heat transfer performance. In conclusion, TDS performance can be optimised for a lower dimensionless length using the same design configuration, or the design configuration should be modified to increase the generated swirl flow intensity

Pendidikan akhlak kepada Allah S.W.T nadi penggerak pembangunan peradaban insan

Pendidikan akhlak kepada Allah S.W.T. (PAKA) merupakan nadi penggerak kepada aspek Pendidikan Pembangunan Insan yang terpenting dalam Pendidikan Islam. Kesempurnaan pendidikan akhlak ini menjadi pemangkin untuk membentuk manusia menjadi insan yang sempurna dalam segala aspek terutamanya dalam aspek kerohanian. Al-Imam Al-Nawawi melalui karyanya, Kitab Riyad al-Solihin, membicarakan secara terperinci aspek AKA ini. Beliau telah menyenaraikan sebanyak 22 PAKA yang terdiri kepada tiga pembangunan iaitu AKA melalui pembangunan hati, pembangunan pemikiran dan pembangunan tindakan. Kesemua AKA ini berkait rapat antara satu sama lain yang mampu memperkuat dan memperkukuhkan aspek kerohanian dan peribadi insan soleh

Effect of diameter, twist angle, and blade count on the thermal-hydraulic performance of a decaying twisted swirler

Inserting a decaying swirler into a heat exchanger has been shown to improve heat transfer with minimal effect on the friction factor. The study analyses the effect of diameter, twist angle, and blade count on the thermal-hydraulic performance of a Decaying Twisted Swirler (DTS) in a horizontally heated tube. The diameter, twist angle, and DTS's blade count are examined for 13.5 mm–15.5 mm with a 0.5 mm interval, 0°–360° with a 60° gap, and 2 to 6 blades, respectively. The Nusselt number, friction factor, and thermal-hydraulic performance are examined for Reynolds numbers between 4583 and 35000. The relative Nusselt number and friction factor increase as DTS diameter and twist angle increase, reaching a maximum value at Re = 4583. Despite this, the relative Nusselt number dispersed as the blade count increased. The relative friction factor increases as the blade count increases. Maximum relative Nusselt number and friction factor reached 1.64 and 3.25, respectively with DTS's 15.5 mm diameter, 360° angle, and 4 blades. Nonetheless, the thermal-hydraulic performance is greatest when the DTS has a diameter of 15.5 mm, a twist angle of 180°, and 2 blades with 1.17