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The Effect of Job and Environmental Factors on Job Satisfaction in Automotive Industries

100%

Dawal S. Z. M. , Taha Z.

International Journal of Occupational Safety and Ergonomics

2006

tom Vol. 12, No. 3

267--280

A methodology was developed for diagnosing industrial work, which includes questionnaire, observation, measurements, data collection and statistical analysis. A survey was conducted to investigate the relationship between job satisfaction and factors that affect work design in 2 automotives manufacturing companies in Malaysia. A basic work design model was proposed. The aim of this model was to determine the factors that influence employees’ perception towards their work. A set of multiple-choice questionnaires was developed and data was collected by interviewing employees at a production plant. The survey focused on job and environmental factors. The results supported the proposed model and showed that job and environmental factors were significantly related to job satisfaction. They highlighted the significant influence of age, work experience and marital status on job satisfaction. Further, environmental factors, especially the surroundings, context dependence and the building’s function, also had a significant impact on job satisfaction.

Development of statistical models for predicting muscle and mental activities during repetitive precision tasks

80%

Zadry H. R. , Dawal S. Z. M. , Taha Z.

International Journal of Occupational Safety and Ergonomics

2016

tom Vol. 22, No. 3

374--383

This study was conducted to develop muscle and mental activities on repetitive precision tasks. A laboratory experiment was used to address the objectives. Surface electromyography was used to measure muscle activities from eight upper limb muscles, while electroencephalography recorded mental activities from six channels. Fourteen university students participated in the study. The results show that muscle and mental activities increase for all tasks, indicating the occurrence of muscle and mental fatigue. A linear relationship between muscle activity, mental activity and time was found while subjects were performing the task. Thus, models were developed using those variables. The models were found valid after validation using other students’ and workers’ data. Findings from this study can contribute as a reference for future studies investigating muscle and mental activity and can be applied in industry as guidelines to manage muscle and mental fatigue, especially to manage job schedules and rotation.

Anthropometric Database for the Learning Environment of High School and University Students

70%

Dawal S. Z. M. , Zadry H. R. , Azmi S. N. S. , Rohim S. R. , Sartika S. J.

International Journal of Occupational Safety and Ergonomics

2012

tom Vol. 18, No. 4

461--472

This paper presents an anthropometric database of high school and university students from Kuala Lumpur,Malaysia. Forty-one high school participants (21 males and 20 females), 13–17 years old, and 143 university students (74 males and 69 females) took part in the study. Twenty-one static body dimensions were measured. The greatest mean differences in the anthropometric data between male and female high school students were found in the sitting elbow height. In addition, a comparison of anthropometric data of male and female university students showed that data for males and females were significantly different, except for buttock–popliteal length, sitting elbow height and thigh clearance. The primary aim of this study was to develop an anthropometric database that could be used as a primary reference in designing products, devices and equipment for ergonomic learning environments.