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Land use changes in relation to coastal tourism developments in Turkish Mediterranean

100%

Atik M. , Altan T. , Artar M.

Polish Journal of Environmental Studies

2010

tom 19

nr 1

21-33

Tourism is one of the major driving forces behind land use and landscape changes in the coastal Mediterranean. The aim of this study is to analyze the land use changes in relation to coastal tourism developments in the Turkish Mediterranean. Spatial and quantitative inventory of land use changes was delineated by interpreting physical land use data for 1974, 1988, 1990 and 1996 in GIS systems. Study results showed that 816 hectares of agricultural land and 457 hectares of natural coastal forest are converted to tourism-based establishments such as hotels, service buildings and settlements. Degradation of the coastal forests was higher in the beginning of tourism developments, but this trend has become static while constant change on agricultural lands was expected to continue in the coming years. Therefore, it is crucial that tourism development plans be accompanied with a set of ecological, social and economic system for the livelihood of tourism and the operated area.

Prediction of Fracture Stress with Regard to Porosity in Cast A356 Alloy

71%

Sahin H. , Atik M. , Tezer F. , Temel S. , Aydin O. , Kesen O. , Gursoy O. , Dispinar D. , Sahin H. , Atik M. , Tezer F. , Temel S. , Aydin O. , Kesen O. , Gursoy O. , Dispinar D.

nr 3

Prediction of Fracture Stress with Regard to Porosity in Cast A356 Alloy

63%

Sahin H. , Atik M. , Tezer F. , Temel S. , Aydin O. , Kesen O. , Gursoy O. , Dispinar D.

Archives of Foundry Engineering

2021

tom Vol. 21, iss. 4

21--28

Production of the defect-free casting of aluminium alloys is the biggest challenge. Porosity is known to be the most important defect. Therefore, many cast parts are subjected to several non-destructive tests in order to check their acceptability. There are several standards, yet, the acceptance limit of porosity size and distribution may change according to the customer design and requirements. In this work, the aim was targeted to evaluate the effect of size, location, and distribution of pores on the tensile properties of cast A356 alloy. ANSYS software was used to perform stress analysis where the pore sizes were changed between 0.05 mm to 3 mm by 0.05 mm increments. Additionally, pore number was changed from 1 to 5 where they were placed at different locations in the test bar. Finally, bifilms were placed inside the pore at different sizes and orientations. The stress generated along the pores was recorded and compared with the fracture stress of the A356 alloy. It was found that as the bifilm size was getting smaller, their effect on tensile properties was lowered. On the other hand, as bifilms were larger, their orientation became the dominant factor in determining the fracture.