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Now showing items 1461-1470 of 1493
Optimization of processing parameters for graphitization of oil palm trunk waste at lower heating temperature
(IOP Publishing Ltd, 2019-07)
Previously synthetic graphite was produced at higher temperature which is around 2,500°C in complex processing method. The method bear the name of the scientist whose discover the synthetic graphite namely "Acheson Process". ...
Microstructural analysis of fly ash-based geopolymers with various alkali concentration
(IOP Publishing Ltd, 2019-08)
In the present work, a comparative study on the effect of different concentration of sodium hydroxide (NaOH) on fly ash-based geopolymer was investigated. The geopolymer synthesis by mixing fly ash with alkali activator ...
Effect of solid-to-liquid ratio on thin fly ash geopolymer
(IOP Publishing Ltd, 2020-02)
The present work studies the effect of solid-to-liquid (S/L) ratio on the properties of thin fly ash-based geopolymer. The fly ash geopolymers with dimension of 160 mm × 40 mm × 10 mm were synthesised by using various S/L ...
Design of single layered circular and rectangular U-slotted, CPW-fed antennas and arrays for RFID applications
(Institute of Electrical and Electronics Engineers (IEEE), 2010-05-26)
This work describes the design of high gain, U-slot antennas for RFID 915 MHz (902-
928 MHz) applications. Four types of antenna were designed, optimized and evaluated -
a circular, U-slotted antenna, a rectangular ...
Synthesis and characterization of fly ash based geopolymer ceramics: effect of NaOH concentration
(IOP Publishing Ltd, 2020-02)
Ceramic materials have demonstrated impressive performance under severe conditions in a wide number of areas including health, energy and environment, transportation and electronic applications. In order to meet the growing ...
Mechanical and physical properties of bottom ash/fly ash geopolymer for pavement brick application
(IOP Publishing Ltd, 2020-02)
Geopolymers are amorphous to semi-crystalline with excellent physical and and mechanical properties. It has been used to become a potential binder to Ordinary Portland Cement (OPC) in certain applications due to its lower ...
In Vitro bioactivity study of thermoplastic Starch/Bentonite/Hydroxyapatite composites for biomedical applications
(IOP Publishing Ltd, 2020-02)
Potato starch composites film incorporating hybrid bentonite and hydroxyapatite (HA) were investigated as novel biomaterial for potential biomedical applications. The selected potato starch/bentonite composites were prepared ...
Compressive strength and thermal conductivity of metakaolin geopolymers with anisotropic insulations
(IOP Publishing Ltd, 2020-02)
This research investigated the properties of thermally insulating geopolymer prepared using waste filler (fibreboard and rubber) to act as anisotropic pore/insulation. The geopolymer matrix was synthesised using metakaolin ...
Lipase production from Jatropha curcas solid waste
(Universiti Malaysia Perlis (UniMAP), 2010-10-16)
Lipases produced by using agro-industrial residual or waste as substrate become interesting topic among the researchers. The aim of this study was to produce lipases by valorization the Jatropha solid waste as substrate ...
Site-specific evaluation of a MIMO channel capacity for multi-antenna mobile terminals in proximity to a human hand
(The European Association on Antennas and Propagation (EurAAP), 2011-04-10)
This paper presents a comprehensive evaluation on the Multiple-Input Multiple-Output (MIMO) channel capacity performance of a coupling element -based multi-antenna structures on a mobile terminal at the 2000 MHz Universal ...