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This study proposes a new scheme for measurement of safety performance in work systems using segmented point process models that can capture the points of changes in the working conditions as well as changes in safety initiatives. Data, collected from an underground coal mine, were analyzed using homogeneous (HPP) as well as non-homogeneous (NHPP) point process models. Time between occurrences (TBO)...
A failed component / system brought back to its functioning state after repair exhibits different failure intensity than before its failure. This happens because the system in which the component is functioning experiences deterioration with age or the component / system is a repaired one which is aged compared to a new component / system. These factors affect the failure intensity of the component...
Increasing concentration of atmospheric green house gases such as carbon dioxide (CO2) that traps solar energy within the atmosphere are being investigated in connection with the warming of the planet and changes in climatic conditions. Carbon dioxide emitted from point sources plays major role for climate change. The steel industry is one of the largest energy consuming manufacturing sectors accounting...
Carbon dioxide emission into the atmosphere from the major point sources such as coal fired power plants, steel plants, cement industries triggered studies on its green house effects. Mineral carbonation is an option for storage of carbon dioxide in industrial waste materials by converting it into carbonates similar to the end products of natural weathering processes. Present study deals with carbonation...
The failure processes of a maintained system can be studied from the failure data using imperfect repair models. Additional information on the failure process can also be utilized in the form of covariates using proportional intensity models for getting more realistic results. Both these models can be combined to form imperfect repair proportional intensity models making use of the times to failure...
Most field systems today are maintained systems. Decisions about reliability of these systems are based on field or test failure data. For highly reliable and good quality systems the failures are few and far between. To understand their failure behaviour and reliability characteristics will take a long time. If the prototype systems are subjected to tests with higher levels of stresses leading to...
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