Silicosis is considered to be among the occupational lung diseases and associated with sandblasting, mining, quarrying and tunneling. Acute silicosis is usually progressive diseaseand despite treatment with corticosteroids it leads to cardio-respiratory failure and death. Alveolar silicoproteinosis is one of it's acute presentations due to exposure to silica dust and lungs filling with proteina...

This paper consists of two parts. In the first part we carry out a traditional growth accounting exercise for the private business sectors of the Swedish economy. We search for structural breaks during the sample period, using Chow tests, using a dynamic specification of Total Factor Productivity (TFP) growth rates. Grangercausality tests are carried out for the nine sub-sectors of the private ...

In this paper, problem of short-term production planning for dimension stone quarries was mathematically modeled using a binary integer programming. The model includes an objective function, which was founded as the minimization of the costs due to the total cutting planes of the blocks. This objective may cause to maximization of the net present value (NPV) in dimension stone quarries. During ...

Geologists, petrologists, geomorphologists, botanists and ecologists often collect samples through field surveys. They are required to obtain permission from the Ministry of Environment before collecting in a special zone marine park national park. For example, is necessary for sampling prior mining minerals or quarrying soil stones such zones. A legal procedure introduced that be followed taki...