Effect of Humidity on Partial Discharge Characteristics of Epoxy/Boron Nitride Nanocomposite under High Voltage Stress

Partial discharge (PD) may lead to the degradation of insulating materials and affect the lifetime of high voltage equipment. This paper describes the effect of relative humidity on PD characteristic of epoxy/boron nitride (BN) nanocomposite under high voltage (HV) stress. In this work, CIGRE Method II was utilized as an electrode configuration. BN nanofiller was chosen because of its high insulating properties with high thermal conductivity. The PD characteristics such as PD charge magnitude, PD number or occurrence, and average of PD charge during certain of ageing time under HV stress against relative humidity were examined. The results revealed that PD number of humid samples is higher about 8~14% compared to the normal ones. It is considered due to the decrease of surface resistance of the humid samples. The PD charge magnitudes of humid samples are slightly higher compared to the normal ones. The epoxy/BN nanocomposite has lesser PD number and magnitude compared to the neat epoxy samples

MADgazine: Advertising Design Showcase 2022

This magazine was consist of works created by the final year students of Bachelor of Multimedia Advertising Design programme. It is a compilation of all the final projects that executed by the students as part of their fulfilment for the undergraduate degree

Ikhtisar analisis Pilihan Raya Umum 1978 hingga 2013 di Malaysia

Pilihan raya adalah elemen penting dalam sistem demokrasi. Dalam konteks Malaysia, pilihan raya telah diadakan sejak 1955 sebelum merdeka dan tahun 1959 selepas merdeka. Tulisan ini menganalisis PRU 1978 hingga 2013 untuk melihat dinamika pencapaian parti-parti politik di Malaysia. Relevan PRU 1978 dipilih kerana PAS telah dikeluarkan dari gabungan BN dan bermula dari itulah persaingan politik antara BN dan parti-parti oposisi menjadi semakin dinamik dan menarik. Ini kerana terdapatnya jatuh bangun pencapaian parti politik sepanjang PRU 1978- 2013. Krisis dalaman parti dan konflik kepimpinan menjadi salah satu faktor yang penting dalam mempengaruhi kebanyakan keputusan PRU. Bagi parti oposisi, krisis dalaman UMNO/BN memberi manfaat dan kelebihan kepada mereka dalam beberapa siri PRU sehingga berjaya menawan beberapa negeri dan menafikan majoriti dua pertiga BN bagi kerusi parlimen. Di samping itu, kerjasama antara parti oposisi turut menjadi faktor penting dalam mempengaruhi keputusan PRU serta mewarnai politik pilihan raya di Malaysia

Diversity and distribution of euphyllidae corals in tioman island: Emphasis on the genetic variation of euphyllia cristata

Euphyllidae corals are among the most beautiful corals that have been exploited for the aquarium trade all over the world. In Malaysia, the information on these coral species particularly on the diversity and genetic variation is not fully documented. Realizing to this matter, the diversity and distribution of Euphylllidae corals were investigated at 13 sampling stations in Tioman Island. The diversity and distribution of Euphyllidae corals were observed and recorded using the Coral Video Transect (CVT) method. The captured images were analyzed using Coral Point Count with Excel extension (CPCe) software. The samples of Euphyllia cristata were collected at three different zones in Tioman Island (East Coast, West Coast and Isolated Island). The samples were extracted and mitochondrial Cytochrome Oxidase 1 gene primer was used to study their genetic variation. A total of six species belong to three genera of Euphyllia, Plerogyra and Physogyra were recorded. Benuang Bay (East Coast) and Bayan Bay (Isolated Island) have shown higher diversity and distribution of Euphyllidae corals among the sampling stations. The Shannon-Weinner index (H’) of Benuang Bay and Bayan Bay were 1.42 and 1.43 respectively. The West Coast zone had the lowest diversity and distribution of Euphyllidae corals due to massive coastal development and loads of human intervention. The genetic sequences from the East Coast and West Coast were closely related. The pairwise distance between these two zones is 0.003. There is a slight difference in the sequence from the Isolated Island. The pairwise distance of West Coast-Isolated and East Coast-Isolated are 0.021 and 0.025 respectively. However, it is relatively low to consider there is evolutionary divergence between the samples. Thus, no genetic variation was observed between all Euphyllia cristata taken at three different zones of Tioman Island. This study has shown that there was a highly significant difference (p<0.01) in the diversity and distribution of Euphyllidae corals with respect to sampling stations