Browsing by Author "Akca, Erhan"

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    Mapping the Dominant Forest Tree Distribution Using a Combined Image Classification Approach in a Complex Eastern Mediterranean Basin
    (Taylor & Francis Ltd, 2017) Satir, Onur; Berberoglu, Suha; Akca, Erhan; Yeler, Okan
    A land use/cover (LUC) classification strategy based on an unsupervised k-means, object-based and expert knowledge classification technique was cross-checked using Landsat satellite datasets along with ancillary data for mapping dominant forest tree species of the Goksu River Basin in the Eastern Mediterranean Region. Eight dominant forest tree species were classified as juniper (Juniperus excelsa Bieb), Taurus fir (Abies cilicica Ant. & Kotschy), Turkish pine (Pinus brutia Tenore), black pine (Pinus nigra Arnold), cedar (Cedrus libani Rich), oak (Quercus pubescens Schwarz and Quercus cerris Pall), stone pine (Pinus pinea L.) and plane (Platanus orientalis L.). The results of the combined classification approach (CCA) were compared with a traditional maximum likelihood classifier (MLC) for a better understanding of the benefits of the CCA. Kappa values of the CCA and the MLC were derived as 0.77 and 0.44 respectively.
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    Preliminary Chemical and Micromorphological Observations on Urartu (800-600 Bc) Ceramics, Eastern Turkey
    (John Wiley & Sons inc, 2010) Akca, Erhan; Arocena, Joselito; Kilic, Sinan; Dingil, Mahmut; Kapur, Selim
    Anatolia has long been a major pottery production center of the ancient world, dating back 7000 cal yr B.P. The Early Iron Age Urartu Kingdom (800-600 B.C.) of eastern Anatolia is known for the production of high-quality pottery, but little is known regarding firing technology and manufacture of these ceramics. Here we present a preliminary study of Urartu ceramic micromorphology and chemistry and suggest that the Urartus had good knowledge of local geology and intentionally used chemical fluxes (Pb, Rb, and Li) to attain desired firing temperatures. The sophisticated production of Urartu ceramics is comparable to later high-quality Roman pottery (terra sigillata) procured from the same area. (C) 2010 Wiley Periodicals, Inc.