The influence of carbonization temperature on the development of carbon membrane with superior CO2/CH4 separation performance Pengaruh suhu karbonisasi kepada pembangunan membran karbon dengan kesan pemisahan gas CO2/CH4 yang cemerlang

In this study, P84-based carbon tubular membranes were fabricated and characterized in terms of their structural morphology and gas permeation properties, by using Scanning Electron Microscopy (SEM) and pure gas permeation system, respectively. The polymer tubular membranes were then carbonized under nitrogen atmosphere at different carbonization temperatures of 600, 700, 800 and 900 °C, with heating rate of 3°C/min and thermal soak time of 30 minutes. The manipulation of carbonization temperatures was required to see if it could enhance the permeation properties as desired. Pure gas permeation tests were performed using CO2 and CH4 gases. The CO2/CH4 selectivity was found increasing as the carbonization temperature was increased from 600 to 800 °C. The carbon membrane carbonized at 800°C showed the most promising result for CO2/CH4 selectivity, rendering 69.48 and CO2 permeance of 206.1 GPU

Development of crack on composite detection sensor using magnetic induction concept

A crack detection is very important to control the quality of the composite itself that been widely used in industries. There are quite a numbers of techniques which are used to detect the crack such as visual inspection, radiography, ultrasonic, eddy current magnetic particle, and penetrant testing. In this paper, it focuses on designing and implementing the system to detect a crack on the composite material using magnetic induction concept. At the early stage, the miniature of composite detection sensor using magnetic induction concept is designed using Comsol Multiphysics software to see the current induced from the system. The current value from the sensor is measured based on magnetic induction concept. A complete design of a system then is designed which include the sensor design, the main controller unit design and Bluetooth electronic application. The experiment results show that the magnetic induction concept can be used to detect crack by changing the value of current. When crack occurs the value of current will decrease due to the changes of magnetic induction

MPEG-4 video transmission using distributed TDMA MAC protocol over IEEE 802.15.4 wireless technology

The issues of green technology nowadays give an inspiration to the researcher to make all the future design to be energy efficient. Medium Access Control (MAC) layer is the most effective layer to provide energy efficient due to its ability to control the physical radio directly. One of the important applications in the future is a video transmission that can be transmitted with low-cost and low power consumption. MPEG-4 is one of the international standards for moving video. MPEG-4 provide better compression and primarily design at low bit rate communication. In order to achieve good quality for video application, the design at MAC layer must be strong. Therefore, to increase the performance of the MPEG-4 in IEEE 802.15.4, in this paper we propose a cross layer design between MAC layer and Application layer. A priority queue will be implemented at MAC scheduling depends on the level of frame important in MPEG-4 format frame. A distributed Time division Multiple Access (TDMA) will be used for MAC protocol to provide reliable data transmission for high priority frame

ERGONOMICS ASSESSMENT OF WORKSTATION DESIGN IN AUTOMOTIVE INDUSTRY

The purpose of this study is to demonstrate the ability to interpret the various aspects of ergonomics contributions and influences in the manufacturing industry. The application of knowledge and understanding of the ergonomics theories and techniques in the manufacturing industry also will be demonstrated in this study. Besides that, this report will be able us to appreciate the ergonomic role in manufacturing industry and everyday context by showing the ergonomics contribution towards employees’ health and safety in the workplace and tangible or intangible profitability of the company. Adequate posture, work height, normal and maximum working areas are determined for the intended user population. The procedure for determining the workstation dimensions and layout has been explained. The importance of building a mock-up of the designed workstation and its evaluation with representative subjects is emphasized. A case problem (Final Inspection workstation) is discussed to illustrate the workstation design procedure

Optimal Thermal Distribution by using Inverse Genetic Algorithm Optimization Technique

Optimal arrangement of components on printed circuit board (PCB) has become a basic necessity so as to have effective management of heat generation and dissipation. In this work, Inverse Genetic Algorithm (IGA) optimization has been adopted in order to achieve this objective. This paper proposes IGA search engine to optimize the thermal profile of components based on thermal resistance network and to minimize the area of PCB. Comparison between the proposed IGA and the conventional GA (FGA) performances are extensively analyzed. Unlike the conventional FGA, the IGA approach allows the user to set the desired fitness, so that the GA process will try to approach these set values. A reduction in the overall computational time and the freedom of choosing a desired fitness are the major advantages of IGA over FGA. From the simulation results, the IGA has successfully minimized the thermal profile and area of PCB by 0.78% and 1.28% respectively. The computational time has also been minimized by 15.56%

Factors Influencing Turnover Intention in a Malaysian Manufacturing Company

Turnover intention is defined as a process of employee to leave the current job or his willingness to separate from the organization. Truthfully, the talent of one employee cannot be inherited or be same by others new employee, thus, the need to retain the employee talents are crucial for employers and organizations to face the challenges in today’s intense global competition. Employee turnover has become most important issues to most organizations, hence, this issue still need a special attention since it can affect organizational performance. However, in retaining employees, organization cannot escape from exposing their workforce to higher level of work stress in order to achieve high demands and targets. Thus, the main objective of this paper is to examine the relationship between job stress, work engagement, job satisfaction and organizational commitment and employee turnover intention among manufacturing employees in Malaysia. A total of 170 employees were surveyed through a self-administered questionnaire. Statistical Package for Social Science (SPSS) version 20 was employed to perform data analysis of the study. Descriptive, Correlations and Regressions Analyses were performed and the findings revealed that there is significant relationship between work engagement, job satisfaction and organizational commitment and turnover intention. While no significant relationship was found between job stress and turnover intention.     Keywords: turnover intention, job stress, work engagement, job satisfaction and organizational commitment

Pengaruh Model Pembelajaran TGT (Teams Games Tournament) Menggunakan Media Animasi dan Kartu terhadap Hasil Belajar Siswa pada Materi Larutan Elektrolit dan Larutan Nonelektrolit

Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan media animasi dan kartu melalui model pembelajaran TGT, terhadap hasil belajar siswa pada materi larutan elektrolit dan larutan nonelektrolit di Madrasah Aliyah Negeri Limboto tahun Pelajaran 2017/2018. Motode penelitian ini menggunakan metode eksperimen dengan metode purposive sampling, yang terdiri dari dua kelas yaitu kelas X Mia1 sebagai kelas kontrol menggunakan metode konvensional (pengajaran langsung) dan kelas X Mia 2 sebagai kelas eksperiment diberi model pembelajaran TGT (Teams Games Tournament) menggunakan media animasi dan kartu. Hasil penelitian menyatakan bahwa berdasarkan hasil uji hipotesis menggunakan uji t-tes dan hasil yang didapat dari analisis statistik bahwa (thitung = 17,0753 > ttabel = 2,12) pada α = 0,05 hal ini menunjukan bahwa model pembelajaran TGT (Teams Games Tournament) menggunakan media animasi untuk meningkatkan hasil belajar siswa secara signifikan pada materi larutan elektrolit dan larutan nonelektrolit

The influence of organic and conventional fertilisation and crop protection practices, preceding crop, harvest year and weather conditions on yield and quality of potato (Solanum tuberosum) in a long-term management trial

The effects of organic versus conventional crop management practices (fertilisation, crop protection) and preceding crop on potato tuber yield (total, marketable, tuber size grade distribution) and quality (proportion of diseased, green and damaged tubers, tuber macro-nutrient concentrations) parameters were investigated over six years (2004–2009) as part of a long-term factorial field trial in North East England. Inter-year variability (the effects of weather and preceding crop) was observed to have a profound effect on yields and quality parameters, and this variability was greater in organic fertility systems. Total and marketable yields were significantly reduced by the use of both organic crop protection and fertility management. However, the yield gap between organic and conventional fertilisation regimes was greater and more variable than that between crop protection practices. This appears to be attributable mainly to lower and less predictable nitrogen supply in organically fertilised crops. Increased incidence of late blight in organic crop protection systems only occurred when conventional fertilisation was applied. In organically fertilised crops yield was significantly higher following grass/red clover leys than winter wheat, but there was no pre-crop effect in conventionally fertilised crops. The results highlight that nitrogen supply from organic fertilisers rather than inefficient pest and disease control may be the major limiting factor for yields in organic potato production systems

Impact of foreign aid and foreign direct investment on economic growth: evidence from Sub-Saharan African countries

The purpose of this study is to examine the impact of foreign aid and FDI on economic growth of Sub-Saharan African countries. The generalized method of moments is applied on 41 countries covering the period of 1998 to 2010. The results suggest that while foreign aid has negative effect on growth, the impact of FDI is positive but statistically insignificant. Furthermore, we found evidence that foreign aid from different bilateral donors may have different effects on economic growth