Performance of treated and untreated asymmetric polysulfone hollow fiber membrane in series and cascade module configurations for CO2/CH4 gas separation system

This study investigates the effects of one-, two- and three-stage membrane system configurations in series arrangement for theCO2/CH4 separation for both untreated and treated membranes. Asymmetric polysulfone hollow fiber membranes were fabricated from 33 wt.% of polysulfone polymer using dry/wet phase inversion process. The produced membranes were characterized by pure gas permeation experiments, Differential Scanning Calorimetry (DSC), Scanning Electron Microscopy (SEM), density measurement and Thermogravimetric Analysis (TGA). For both untreated and treated membranes, the pressure-normalized flux of CO2 decreased with increasing of the membrane stages. In addition, the selectivities of asymmetric hollow fiber membrane showed a more constant trend with feed pressure. Treated membrane exhibited lower pressure-normalized flux than untreated membranes due to skin layer densification which increased the transport resistance, thus lead to the reduction in pressure-normalized fluxes. Among all the three configurations studied, two-stage membrane configuration showed the most constant trend in term of selectivity. However, three-stage cascade configuration produced the highest CO2/CH4 selectivity especially when tested at low feed pressure range. Effect of stage cut on feed pressure showed an increasing trend with increasing of CO2 and CH4 feed pressure for all configurations. This is due to the increase of the permeation driving force, which caused the passage of larger amounts of more permeable gas through the membrane. This study showed that, three-stage cascade configuration exhibited the smallest stage cut values thus produced higher purity of CO2 in permeate stream

Health Inequities with Somali Women in Kuala Lumpur

Edited by Kirandeep Kau

Importance of Locating Strike in 2d Magnetotelluric Data Modeling

2D inversion is still believed as the fastest, cheapest, and most reliable method magnetotelluric data interpretation. Traditionally the magnetotelluric data are collected on 2D profile perpendicularly across an assumed geological strike. However there is no guarantee where the chosen strike is exactly or nearly same as true geoelectrical strike. For this purpose, 2D synthetic magnetotelluric impedance data of a simple 2D model were generated along a profile across the model. The data were inverted on various presumed strike in order to study how far the inverted model is deviated when the presumed strike is moved away to the true strike. By the aim, first the data were inverted as measured on 2D profile perpendicularly across true strike in order to see how the inversion works in the ideal case. Thedata were also inverted as measured on 2D profile perpendicularly across an assumed strike. The presumed strike deviated 60 degrees to the true strike was selected as an example of extreme case. The model inverted from the extreme presumed strike data is compared to the actual one. The inversions on determinant and combined TE and TM modes have been done as well for model resolution comparison

Pemanfaatan Media Kit oleh Guru dalam Pembelajaran IPA untuk Meningkatkan Hasil Belajar Siswa di SMP Negeri 4 Kota Singkawang

Penelitian ini bertujuan untuk meningkatkan hasil belajar yang dicapai siswa dengan pemanfaatan media. Jenis penelitian dalam penelitian ini adalah kualitatif. Dan bentuk penelitiannya adalah deskriftif. Alat pengumpul data yang digunakan yaitu tes, wawancara, dan observasi. Dari pemanfaatan media Kit yang digunakan terbukti dapat meningkatkan kemampuan penguasaan materi pembelajaran serta meningkatkan kemampuan kinerja ilmiah siswa terutama dalam melakukan percobaan, melakukan pengamatan, pengambilan keputusan dan melaporkan hasil percobaan. Sesuai hasil observasi, wawancara dengan guru dan siswa diperoleh data bahwa dalam pelaksanaan pemanfaatan media Kit dalam pembelajaran, guru menunjukkan kemampuannya mengoperasikan media Kit, melibatkan siswa, memberikan bimbingan kepada siswa dan memperhatikan keselamatan dalam pemanfaatan media Kit selama pembelajaran

Radiographic Study of Developmental Alteration in Tooth Number Among Children in IIUM Dental Clinic

Background: The aim of this research was to determine the prevalence, distribution and association of developmental alteration in tooth number with gender, location, and presence of delayed eruption of tooth among children who attended to Student's polyclinic of IIUM Kuantan, Malaysia. Methods: A cross sectional study on total 727 Orthopanthomograms (OPGs) of 3-17 years old children from April 2009 to July 2012. OPGs with presence of alteration number were scrutinized to find out the prevalence, distribution and association. The data was analyzed comparing gender, location and presence of delayed eruption and tested using Chi-square test. Results: Out of 727 OPGs, 71 OPGs showed developmental alteration in tooth number. The prevalence was 98/1000 OPGs within 3 years. Among those 71 OPGs, the gender differences were: males (49.3%) and females (50.7%). Locations were found in maxilla (45.1%), mandible (40.8%) and both (14.0%). The finding of delayed eruption was (7.0%). There were significant differences between alteration in tooth number with location as (p<0.05) while there were no significant differences with gender and delayed eruption as (p>0.05). Conclusions: This study showed that hyperdontia was considerably lower than hypodontia. There was association between alteration in tooth number with location, but no association with gender and delayed eruption

Impeachment in the State System

Impeachment In Constitutional System. This paper aims: To know and analyze how the impeachment arrangements in the Indonesian state administration system; To know and analyze how the legal process in impeachment mechanism before amendment and after an amendment of 1945 Constitution; by using Normative Method The study conducted in this research is the literature. Impeachment of the President and Vice President of his / her position is not new in the Indonesian state administration system. Both before the amendment and after the amendment of the 1945 Constitution. The 1945 Constitution of the amendment result has specified the provisions concerning the Impeachment of the President and Vice President as head of state. However, the mechanism of the impeachment process is determined in a constitutionally eliminative manner even though these reasons have a very broad interpretation and may be subjective, especially in a political institution of the DPR, by which there are several things to be considered in the impeachment process in Indonesia, such as the impeachment process in the House of Representatives Regional and process of Impeachment in the Constitutional Court. There is a need for the provision of legal products or the making of procedural law which regulates the impeachment of the President and Vice President

Seleksi Penerimaan Karyawan Baru Menggunakan Metode WP (Weighted Product) dengan Bahasa Pemrograman PHP dan MySQL

Seleksi karyawan merupakan proses pencarian dan penarikan tenaga kerja yang memiliki potensi untuk mengisi lowongan pekerjaan, tenaga kerja yang berkualitas sangat berpengaruh pada performa kemajuan Perusahaan. Dalam proses pengambilan keputusan penerimaan karyawan baru masih dipengaruhi faktor subjektifitas dan Perusahaan sering kali mengalami kesulitan dalam memilih karyawan, karena banyaknya calon karyawan yang melamar sedangkan yang akan diterima menjadi karyawan sangat terbatas. Tujuan dari penelitian ini yaitu merancang sebuah aplikasi pengambilan keputusan yang dapat membantu penerimaan calon karyawan baru.Salah satu metode yang digunakan untuk pengambilan keputusan yaitu metode WP karena metode WP merupakan metode penyelesaian multi kriteria dimana dalam perekrutan atau seleksi calon karyawan banyak kriteria yang harus dipertimbangkan.Metode pengembangan pada sistem ini menggunakan metode waterfall. Bahasa pemograman yang digunakan adalah PHP dan MySQL sebagai database server.Dari hasil penelitian ini yaitu memberi kemudahan dalam pengambilan keputusan untuk menentukan karyawan yang sesuai dengan kebutuhan dan Kriteria Perusahaan