Yazar "Dalgic, Abdurrahman" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    Determination of environmental exposure to asbestos (tremolite) and mesothelioma risks in the southeastern region of Turkey
    (Heldref Publications, 2004) Senyigit, Abdurrahman; Dalgic, Abdurrahman; Kavak, Orhan; Tanrikulu, Abdullah Cetin
    In this study, the authors examined the concentrations and mineralogical analyses of asbestos, and investigated mesothelioma risk in southeastern Anatolia, Turkey. They used a gravimetric dust sampler to collect samples from 2 villages and 2 asbestos mines (1 active). Samples were then evaluated by an X-ray diffractometer and an electron microscope. The authors found high concentrations of asbestos in an active mine (4.9 fibers[f]/cm(3)) and at a house that was plastered with asbestos (1.24 f/cm(3)) and had a very active population. They found a low concentration (0.0042 f/cm(3)) in indoor measurements taken in Armutova village, and an even lower concentration (0.000081 f/cm(3)) in the inactive mine environment. Outdoor measurements included a low concentration of 0.007 f/cm(3) in the village environment, and a high concentration of 1.17 f/cm(3) on the mine road during the passing of a sheep herd. The people in the region are continuously exposed to asbestos during normal activities. This cumulative exposure to asbestos carries sufficient risks for mesothelioma development.
  • [ X ]
    Öğe
    The use of dynamic programming in optimisation of cut-off grades and different depletion rates together with rehabilitation cost
    (Taylor & Francis Ltd, 2025) Cetin, Erhan; Dalgic, Abdurrahman
    Cut-off grade for a mineral deposit is a grade that is used to classify the material as ore or waste. In order to get maximum profit from a mineral deposit, an optimum schedule of cut-off grades must be used. This paper describes the use of dynamic programming in cut-off grades optimisation and further extension of the method regarding with depletion rates and rehabilitation cost. Partial depletion rates have been used for calculating mining and rehabilitation costs. The software developed in this work guarantees the global optimum for different depletion rates.