Sheet metal stamping has been identified as one of the most hazardous and high-risk process in the world of manufacturing industries. This project was carried out at a sheet metal stamping company located in Perak which is a precision metal stamping company and is focused on 150 tons and 200 tons stamping only. A systematic analysis based on Occupational Safety and Health (OSHA) standard was used to create a model of Hazard Identification, Risk Assessment and Control (HIRARC) at the stamping department to determine hazardous process/areas for department operation and maintenance of observation, safety analysis, workplace inspection, safety checklist and high-risk investigation. Initial risk assessment was conducted by classifying the hazards in three types of level, such as High, Medium and Low. The severity of hazards was calculated to estimate the likelihood it will happen and to decide which process/area needs to be applied control measures implemented in the departments. The risk assessments were repeated, and the results were analyzed. From the analysis of risk assessment shows that a reduction of 17% from the high-risk level of 150 tons and 27% at 200 tons. Safety and health are very important to prevent the occurrence of accidents.
The configuration coordinate model has been used to explain the luminescence behavior of luminescence materials. In order to understand the luminescence process, the configuration coordinate model has explored. We begin by describing some of the early obse interpretations of optical absorption and of luminescence. The absorption and emission process are involving the optical transition between two harmonic oscillators ground state and excited state. The principal emphasis is on radiative transit optical absorption and luminescent emission. Finally, the luminescence determination has examined to study the effect of concentration of excited species to the luminescence process.
Electrical dielectric spectra and alternating current (ac) conductivity of blended poly (N-vinlycarbazole) (PVK) with polyvinylpyrrolidone (PVP) at different temperature are investigated. The polymer blends were prepared by dissolving in dimethylformamide (DMF) using drop casting method and further dried in vacuum oven. The dielectric and ac conductivity of each sample was investigated using electrochemical impedance spectroscopy (EIS) method. Dielectric permittivity studies revealed that there are significant changes in the spectra at different temperature. The ac conductivity was further analyzed by using universal power law. The hopping parameter was calculated by using correlated barrier hopping model.
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