Hygrothermal performance of building envelopes in the tropics under operative conditions : condensation and mould growth risk appraisal

Poor indoor hygrothermal performance increases the risk of indoor moisture problems and deterioration due to mould growth, corrosion and damage to archival materials. Hence, proper control of indoor thermohygric intensity abates indoor moisture and its associated problems. This paper presents the results of envelopes hygrothermal performance assessments in a hot and humid climate building with varying operational profile between adjacent spaces. The case-studied building runs on 24hrs cooling mode in one part against natural and/or mechanical supply-exhaust fan means on the other. In-situ experiments were combined with hygrothermal analytical methods to assess the envelope thermal quality together with the operative conditions against condensation and mould growth risks. The results show that the building is overcooled leading to poor envelope hygrothermal performance with associated condensation and mould growth problems on non-airconditioned sides of the envelopes

THE EFFORTS ON SUSTAINABILITY OF THE ACHIEVEMENT FKMP ON QS WORLD UNIVERSITY RANKING TOP 300 BY SUBJECT

oai:ojs.umb-intl-journal.com:article/2This article review each vital elements and aspects that contribute to sustain recent achievement of Faculty of Mechanical and Manufacturing Engineering (FKMP), Universiti Tun Hussein Onn Malaysia by the QS world university ranking by subject in 2015. Some of recent and important issues are discussed and reviewed. The suggestions for improvements are also raised out for further reference

THE EFFORTS ON SUSTAINABILITY OF THE ACHIEVEMENT FKMP ON QS WORLD UNIVERSITY RANKING TOP 300 BY SUBJECT

This article review each vital elements and aspects that contribute to sustain recent achievement of Faculty of Mechanical and Manufacturing Engineering (FKMP), Universiti Tun Hussein Onn Malaysia by the QS world university ranking by subject in 2015. Some of recent and important issues are discussed and reviewed. The suggestions for improvements are also raised out for further reference

THE EFFORTS ON SUSTAINABILITY OF THE ACHIEVEMENT FKMP ON QS WORLD UNIVERSITY RANKING TOP 300 BY SUBJECT

This article review each vital elements and aspects that contribute to sustain recent achievement of Faculty of Mechanical and Manufacturing Engineering (FKMP), Universiti Tun Hussein Onn Malaysia by the QS world university ranking by subject in 2015. Some of recent and important issues are discussed and reviewed. The suggestions for improvements are also raised out for further reference

Antenna with artificial magnetic conductor for wireless application

— This paper discussed the recent works on Artificial Magnetic Conductor (AMC) with the antenna. Two different application for antenna with AMC have been discussed. The first application is the antenna with AMC that has been used for RFID system to detect the metal object. Without incorporating AMC with antenna the system cannot be detected. When the AMC is attached with the RFID Tag antenna the system is back to normal where longer distance is achieved. The second application is used for flexible AMC using textile material for signal transmission enhancement. Using two antennas for on body application the system has been tested using AMC and without AMC. It shows that the transmission is better when there is an AMC attach to the body compared without AMC. Index Terms — Artificial Magnetic Conductor, high impedance surface, metamaterial, reflection phase

Polyethersulfone/HFO mixed matrix membrane for enhanced oily wastewater rejection

The recent growth of oil and gas industry has led to the increase of oily wastewater release. Membrane technology has been in the spotlight in recent advancement to treat the oily wastewater. Fouling due to surfactant adsorption and/or oil droplets plugging the pore has become one of the major hindrances in most of the research on oily wastewater treatment. In this work, self-synthesized hydrous ferric dioxide nanoparticles (HFO NPs) via chemical precipitation method were incorporated in polyethersulfone (PES) to fabricate a novel nanocomposite mixed matrix membranes (MMMs) for ultrafiltration (UF). The morphologies and physicochemical properties of prepared HFO NPs and MMMs were characterized using Scanning Electron Microscopy (SEM) and Transmission electron microscope (TEM), contact angle goniometer, before further subjected to water permeation test and oil rejection test. It was found that contact angle of membrane decreased remarkably with an increase in HFO nanoparticle loading from 70° to 38° at which proved its improved hydrophilicity which led to a significant rise in permeate flux, achieving 168.06 L/m2h bar in comparison to 63.67 L/m2h bar shown by the plain PES membrane. Total rejection of oil (100% rejection) demonstrated by the MMMs has confirmed the superior potential of PES/HFO UF membrane for total purification of oily wastewater especially to be reused in oilfield and refinery processes as well as to be released to the environment

Extraction and identification of the main compound present in Elaeis guineensis flower volatiles

The main compound contained in the volatile oils of the oil palm flowers was identified as l-methoxy-4 (2-propenyl) benzene or estragole. The same compound was extracted from the anthesizing male and female flowers of the oil palm (Elaeis guineensis). The newly identified compound is believed to be responsible for attracting the adults of the oil palm pollinating weevil, Elaeidobius kemerunicus (Coleoptera: Curculionidae). Steam distillation of1 kg of fresh male and female flowers yielded O.7g and O.2g of volatile oils. The chemical structure and characteristics were confirmed by mass spectromeric analysis, nuclear magnetic resonance (NMR) analysis, and the infrared spectra analysis. The possible usage of the compound in ecological research on the weevil and in the industry' are discussed