Assessment Of Noise Impact: A Case Study Dueto Aircraft Activities

This paper presents the results obtained from an environmental noise measurement at a selected location in Malaysia in order to establish the impact of noise to human at residential area. The measurement site was situated less than three kilometers from the nearest airport and any major activities can be expected to be heard. The noise measurement was carried out for 24 hours monitoring for 30 days by using integrated B&K SLM equipments to obtain the equivalent sound level (Leq), L10 and L90 so that the exposure of noise to community can be assessed. Maximum sound level (Lmax) and sound exposure level have been measured as specified by the Federal Aviation Administration (FAA) for aviation noise assessment. The results revealed that the overall noise level exceeded the requirement of standard which is stated at 65dBA.These finding are very useful to be used as reference and guideline for future regulations on noise limit to be implemented for urban areas in Malaysia not only to human but also for wildlife and building structure

Finite Element Analysis of Hastelloy C-22HS in End Milling

This paper presents a finite element analysis of the stress distribution in the end milling operation of nickel-based superalloy HASTELLOY C-2000. Commercially available finite element software was used to develop the model and analyze the distribution of stress components in the machined surface of HASTELLOY C-22HS following end milling with coated carbide tools. The friction interaction along the tool-chip interface was modeled using the Coulomb friction law. It was found that the stress had lower values under the cut surface and that it increased gradually near the cutting edge

A Descriptive Analysis Of Factors Contributing To Bus Drivers’ Performances While Driving: A Case Study In Malaysia

This paper presents the factors contributing to a bus driver’s performance. A bus driver’s performance is important in ensuring the smoothness and safety of a journey. Descriptive survey research design was adopted for the study. The target population was the bus drivers along the east coast of Malaysia (Pahang, Terengganu and Kelantan). The data for the research was collected by using a questionnaire

Development of temperature statistical model when machining of aerospace alloy materials

This paper presents to develop first-order models for predicting the cutting temperature for end-milling operation of Hastelloy C-22HS by using four different coated carbide cutting tools and two different cutting environments. The first-order equations of cutting temperature are developed using the response surface methodology (RSM). The cutting variables are cutting speed, feed rate, and axial depth. The analyses are carried out with the aid of the statistical software package. It can be seen that the model is suitable to predict the longitudinal component of the cutting temperature close to those readings recorded experimentally with a 95% confident level. The results obtained from the predictive models are also compared with results obtained from finite-element analysis (FEA). The developed first-order equations for the cutting temperature revealed that the feed rate is the most crucial factor, followed by axial depth and cutting speed. The PVD coated cutting tools perform better than the CVD-coated cutting tools in terms of cutting temperature. The cutting tools coated with TiAlN perform better compared with other cutting tools during the machining performance of Hastelloy C-22HS. It followed by TiN/TiCN/TiN and CVD coated with TiN/TiCN/Al2O3 and TiN/TiCN/TiN. From the finite-element analysis, the distribution of the cutting temperature can be discussed. High temperature appears in the lower sliding friction zone and at the cutting tip of the cutting tool. Maximum temperature is developed at the rake face some distance away from the tool nose, however, before the chip lift away

Study on Effect of Human Metabolic Rate on Skin Temperature in Office Environment

The motivation of this study is to get better understanding about the real thermal sensation of people in office environment who undertake moderate activities. All measurements were conducted in a climate chamber. In total, fifteen subjects were participated in three kinds of activities, their skin temperatures and thermal sensation were measured. Skin temperatures (eleven locations) were measured using thermocouple sensors. The results showed that the temperature is the one of factors which affect metabolic rate. There is a strong linear relationship between these three tasks of metabolic rate with skin temperature. Furthermore, the results indicate that there was a greater increase thermal sensation when the metabolic rate 1.6

Computational Analysis of Thermal Building in a No-uniform Thermal Environment

AbstractTo predict of the thermal sensation of people located in no-uniform environment, it is very important to define the local heat transfer detail. In this context, the purpose was to make thermal comfort comparison between temperature settings of air conditioning. The temperature was maintained at five different levels which are 19°C, 21°C, 23°C, 26°C and 29°C. A Computational Fluid Dynamic (CFD) model of an office was built. It was given similar geometries, boundary conditions and heat sources outputs as a real life test room that was used for measurement. In this study, CFD is applied to predict the thermal sensation of people with modified temperature setting. The comparison of thermal comfort parameters between the field measurement and modeling simulation was done and the result CFD was observed to predict the functionality of modified temperature setting. The analysis shows that the highest temperature setting which is 29°C, indoor environment increase compared the lowest temperature setting. It is intended to contribute to the effort towards designing and instrumenting buildings that provide cleaner and more comfortable environment and for obtaining maximum energy savings

RULA: Postural Loading Assessment Tools for Malaysia Mining Industry

The ergonomics and environment factors have been the core issue for the mining industry for many years, and its profiles are rising. To ensure an ergonomics work environment, it is possible to require specific attention especially in this industries sector. It is becoming increasingly difficult to ignore the essential issue in Malaysia due to lack of ergonomics knowledge and low awareness among the engineers in the mining sector. The focus of this study is to evaluate and validate the physical risk factor associated with work-related musculoskeletal disorder (WMSDs) by using Rapid Upper Limb Assessment (RULA) among mining industry workers. All the physical risk factors involved the main body regions such as upper arm, lower arm, wrist, trunk, neck and leg that has been identified associated with WMSDs. There were 18 subjects selected to involve in this study. Those subjects were chosen according to their job task. To increase the reliability of the result, each subject was evaluated thrice in the trials. From the analysis, the average of final score of the RULA is 7 indicates high risk and calls for engineering/or work method changes to reduce or eliminate muscular disorder risk. The results of the analysis were used to improve the process of work, design of workstation and also improving the work posture to enhance the comfort level of operators. This study is crucial among the mining industry that is a lack of the information and research about the ergonomics issues in the industry. The overall finding indicated that the whole process of selected work task will contribute to musculoskeletal disorder either for a short or long time exposure

Product and Vendor Development Programme in Encouraging Supply Chain Management: A Case Study

This paper reviews the methods used by an automotive manufacturer in enhancing the Supply Chain Management (SCM) system through a setup termed as Product and Vendor Development Programme (PVD). PVD was developed to eliminate problems faced due to late delivery and poor quality of supplies and availability of supplies at the lowest possible costs. The paper explores the methodologies that have been employed by the PVD. Results overtime show that the PVD has improved the SCM system especially in the areas of quality and delivery services, other services and as well as cutting costs that manufacturers had to face due to problems that arose in the shortcomings of the supply services. The PVD has managed to promote the Localization Programme and has also been able to establish qualified vendors. Findings also establish that the PVD team is the key to the success for development of the PVD programme. The paper presents an original discussion about viewing PVD programme from a successful automotive manufacturer

Product and Vendor Development Programme in Encouraging Supply Chain Management: A Case Study

This paper reviews the methods used by an automotive manufacturer in enhancing the Supply Chain Management (SCM) system through a setup termed as Product and Vendor Development Programme (PVD). PVD was developed to eliminate problems faced due to late delivery and poor quality of supplies and availability of supplies at the lowest possible costs. The paper explores the methodologies that have been employed by the PVD. Results overtime show that the PVD has improved the SCM system especially in the areas of quality and delivery services, other services and as well as cutting costs that manufacturers had to face due to problems that arose in the shortcomings of the supply services. The PVD has managed to promote the Localization Programme and has also been able to establish qualified vendors. Findings also establish that the PVD team is the key to the success for development of the PVD programme. The paper presents an original discussion about viewing PVD programme from a successful automotive manufacturer