Browsing by Author "Abdul Aziz Jemain"
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Item Metadata only A Comparative Study of Extreme Rainfall in Peninsular Malaysia: With Reference to Partial Duration and Annual Extreme Series(Penerbit UKM) Abdul Aziz Jemain; Kamarulzaman Ibrahim; Wan Zin Wan ZawiahItem Metadata only Construction of Insurance Scoring System Using Regression Models(Penerbit UKM) Abdul Aziz Jemain; Noriszura IsmailItem Metadata only Indeks kemajuan antara daerah di Semenanjung Malaysia : development index among districts in Peninsular Malaysia(Penerbit UKM) Abdul Aziz JemainItem Metadata only Kajian simulasi kadar negatif palsu dengan min masa kembara.(Penerbit UKM) Abdul Aziz JemainItem Metadata only Ketetapan statistik umurbagi banci 1991(Penerbit UKM) Abdul Aziz JemainItem Metadata only Menyukat kecekapan jabatan : pendekatan multikriteria : Measuring efficiency in a department : multicriteria approach(Penerbit UKM) Abdul Aziz Jemain; Khairul Anuar Mohd. AliItem Restricted Mixed log series geometric distribution for sequences of dry days(Elsevier, 2009) Sayang Mohd Deni; Abdul Aziz JemainThe development of rainfall occurrence models is continuously being explored by a number of researchers in the field since the 20th century. In order to further enhance the development of rainfall occurrence modeling, this present study is aimed to propose a new probability model which is able to describe the daily series of rainfall occurrence, particularly on the duration of consecutive dry or wet days in Peninsular Malaysia.Item Metadata only Model umur berkawin pertama di Jawa dan Bali(Penerbit UKM) Abdul Aziz Jemain; Hadi Sumarno; Wan Norsiah MohamedItem Embargo Perbandingan Pelbagai Kaedah Imputasi bagi Data Lenyap untuk Data Kualiti Udara(Penerbit UKM, 2015) Nuryazmin Ahmat Zainuri; Abdul Aziz Jemain; Nora MudaThis paper presents various imputation methods for air quality data specifically in Malaysia. The main objective was to select the best method of imputation and to compare whether there was any difference in the methods used between stations in Peninsular Malaysia. Missing data for various cases are randomly simulated with 5, 10, 15, 20, 25 and 30% missing. Six methods used in this paper were mean and median substitution, expectation-maximization (EM) method, singular value decomposition (SVD), K-nearest neighbour (KNN) method and sequential K-nearest neighbour (SKNN) method. The performance of the imputations is compared using the performance indicator: The correlation coefficient (R), the index of agreement (d) and the mean absolute error (MAE).Item Metadata only Residuals, outliers and influential observations in regression analysis(Penerbit UKM) Abdul Aziz Jemain; Collett DaveItem Open Access Spatial patterns and trends of daily rainfall regime in Peninsular Malaysia during the southwest and northeast monsoons: 1975-2004(Springer, 2010) Jamaludin Suhaila; S. M. Deni; Wan Zawiah Wan Zin; Abdul Aziz JemainThis study focuses on describing the patterns and trends of five selected rainfall indices in Peninsular Malaysia, based on daily rainfall data from 1975 to 2004. Five rainfall indices based on two main seasons, the northeast and southwest monsoons, were analyzed: total rainfall, frequency of wet days, rainfall intensity, frequency of wet days (extreme frequency), and rainfall intensity (extreme intensity) exceeding the long-term mean 95th percentile.Item Embargo Trend and status of air quality at three different monitoring stations in the Klang Valley, Malaysia(Springer, 2010) Siti Zawiyah Azmi; Mohd Talib Latif; Aida Shafawati Ismail; Liew Juneng; Abdul Aziz JemainOver the last decades, the development of the Klang Valley (Malaysia), as an urban commercial and industrial area, has elevated the risk of atmospheric pollutions. There are several significant sources of air pollutants which vary depending on the background of the location they originate from. The aim of this study is to determine the trend and status of air quality and their correlation with the meteorological factors at different air quality monitoring stations in the Klang Valley. The data of five major air pollutants (PM10, CO, SO2, O3, NO2) were recorded at the Alam Sekitar Sdn Bhd (ASMA) monitoring stations in the Klang Valley, namely Petaling Jaya (S1), Shah Alam (S2) and Gombak (S3). The data from these three stations were compared with the data recorded at Jerantut, Pahang (B), a background station established by the Malaysian Department of Environment.Item Metadata only Two Stage Ranked Set Sampling for Estimating the Population Median = Pensampelan Set Terpangkat Dua Tahap untuk Penganggaran Media Populasi(Penerbit UKM) Abdul Aziz Jemain; Al-Omari Amer; Kamarulzaman Ibrahim