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Ditemukan 4 dokumen yang sesuai dengan query
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"Determination of dielectric in radio frequncy and thermal diffusivity of pepper was conducted dielectric prperties were measured by developed Q-meter at frequency of 9,11,13,15,17,19 and 21 MHZ for moisture content of 8,52 %; 9,93 %; 14,27 %."
Artikel Jurnal  Universitas Indonesia Library
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S. Abdulkareem
"This paper reports on
the investigation of thermal properties of Kapok, Coconut fibre and Sugarcane
bagasse composite materials using molasses as a binder. The composite materials were moulded into
12 cylindrical samples using Kapok, Bagasse, Coconut fibre, Kapok and Bagasse
in the ratios of (70:30; 50:50 and 30:70), Kapok and Coconut fibre in the
ratios of (70:30; 50:50 and 30:70), as well as a combination of Kapok, Bagasse
and Coconut fibre in ratios of (50:10:40; 50:40:10 and 50:30:20). The sample size is a 60 mm
diameter with 10?22 mm thickness compressed at a constant load of 180 N using a Budenberg
compression machine. Thermal conductivity and diffusivity tests were carried
out using thermocouples and the
results were read out on a Digital Multimeter MY64 (Model:
MBEB094816), while
a Digital fluke K/J thermocouple meter PRD-011 (S/NO 6835050) was used to obtain the
temperature measurement for diffusivity. It was observed that of all the twelve
samples moulded, Bagasse, Kapok plus Bagasse (50:50), Kapok plus Coconut fibre
(50:50) and Kapok plus Bagasse plus Coconut fibre (50:40:10) has the lowest
thermal conductivity of 0.0074, 0.0106, 0.0132, and 0.0127 W/(m-K) respectively
and the highest
thermal resistivity. In this regard, Bagasse has the lowest thermal
conductivity followed by Kapok plus Bagasse (50:50), Kapok plus Bagasse plus
Coconut fibre (50:40:10) and Kapok plus Coconut fibre (50:50)."
2016
J-Pdf
Artikel Jurnal  Universitas Indonesia Library
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Abdulkareem S
"This paper reports on the investigation of thermal properties of Kapok, Coconut fibre and Sugarcane bagasse composite materials using molasses as a binder. The composite materials were moulded into 12 cylindrical samples using Kapok, Bagasse, Coconut fibre, Kapok and Bagasse in the ratios of (70:30; 50:50 and 30:70), Kapok and Coconut fibre in the ratios of (70:30; 50:50 and 30:70), as well as a combination of Kapok, Bagasse and Coconut fibre in ratios of (50:10:40; 50:40:10 and 50:30:20). The sample size is a 60mm diameter with 10mm – 22mm thickness compressed at a constant load of 180N using a Budenberg compression machine. Thermal conductivity and diffusivity tests were carried out using thermocouples and the results were read out on a Digital Multimeter MY64 (Model: MBEB094816), while a Digital fluke K/J thermocouple meter PRD-011 (S/NO 6835050) was used to obtain the temperature measurement for diffusivity. It was observed that of all the twelve samples moulded, Bagasse, Kapok plus Bagasse (50:50), Kapok plus Coconut fibre (50:50) and Kapok plus Bagasse plus Coconut fibre (50:40:10) has the lowest thermal conductivity of 0.0074, 0.0106, 0.0132, and 0.0127 W/(m-K) respectively and the highest thermal resistivity. In this regard, Bagasse has the lowest thermal conductivity followed by Kapok plus Bagasse (50:50), Kapok plus Bagasse plus Coconut fibre (50:40:10) and Kapok plus Coconut fibre (50:50)."
Depok: Faculty of Engineering, Universitas Indonesia, 2016
UI-IJTECH 7:6 (2016)
Artikel Jurnal  Universitas Indonesia Library
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"The effect of the electric field polarization on the thermal diffusivity of biaxially strechted poly (ethylene terephtalate) PET films had been examined. The change in the Thermal diffusivity as a function of temperature was measured by temperature wave analysis (TWA) technique. The thermal diffusivity at room temperature increases with the increasing of the polarization electric field. The thermal diffusivity decreases with the increasing of the temperature. The decrease of thermal diffusivity by the increase of temperature could be caused by the effect of carbonyl depolarization. The glass transition temperature, Tg, decreased with the increasing of the polarization electric field. The increase of thermal diffusivity is due to the increase of carbonyl polarization of the PET. Segmental orientation of carbonyl in the thickness direction played an important role in the thermal diffusivity. These results implied that the temperature dependence of the thermal diffusivity was related to the change of the dipolar relaxation and microstructure of PET. "
Jakarta: LIPI Prress,
605 TIJ
Majalah, Jurnal, Buletin  Universitas Indonesia Library