Browsing by Author "Özkan, G"

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    Determining highway slope ratio using a method based on slope angle calculation
    Yilmaz, OS; Özkan, G; Gülgen, F
    Geographic Information System (GIS) is a vital tool used in numerous areas related to natural science and engineering studies. Managing complex data and obtaining accurate results from the analysis are essential functions of GIS. It is also efficiently used in highway designing both in project and application phases. This study proposes a new calculation method of slope angles to determine the suitable slope modal of a road by using topographic and geological datasets in a GIS environment. Using this method in the preparation phase of the project enables a more accurate calculation of earthwork volume. The proposed method was applied to a highway to prove this idea. The selected road is a significant tertiary of which project was completed by the Turkish General Directorate of Highways. In this study, the calculated values of the project were considered as references. Comparing both results obtained from the proposed method and application project, the accuracy of the slope modal of the proposed method is 71%, and the accuracy of its earthwork volume is 99%. The proposed approach will enable project managers and designers to determine more reliable earthwork volume during project feasibility studies without any application in the field.
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    Patient and physician delay in the diagnosis and treatment of non-small cell lung cancer in Turkey
    Yurdakul, AS; Kocatürk, C; Bayiz, H; Gürsoy, S; Bircan, A; Özcan, A; Akkoçlu, A; Uluorman, F; Çelik, P; Köksal, D; Ulubas, B; Sercan, E; Özbudak, Ö; Göksel, T; Önalan, T; Yamansavci, E; Türk, F; Yuncu, G; Çopuraslan, Ç; Mardal, T; Tuncay, E; Karamustafaoglu, A; Yildiz, P; Seçik, F; Kaplan, M; Çaglar, E; Ortaköylü, M; Önal, M; Turna, A; Hekimoglu, E; Dalar, L; Altin, S; Gülhan, M; Akpinar, E; Savas, I; Firat, N; Çamsari, G; Özkan, G; Çetinkaya, E; Kamiloglu, E; Çelik, B; Havlucu, Y
    Aim: The early diagnosis and treatment of lung cancer are important for the prognosis of patients with lung cancer. This study was undertaken to investigate patient and doctor delays in the diagnosis and treatment of NSCLC and the factors affecting these delays. Materials and methods: A total of 1016 patients, including 926 (91.1%) males and 90 (8.9%) females with a mean age of 61.5 +/- 10.1 years, were enrolled prospectively in this study between May 2010 and May 2011 from 17 sites in various Turkish provinces. Results: The patient delay was found to be 49.9 +/- 96.9 days, doctor delay was found to be 87.7 +/- 99.6 days, and total delay was found to be 131.3 +/- 135.2 days. The referral delay was found to be 61.6 +/- 127.2 days, diagnostic delay was found to be 20.4 +/- 44.5 days, and treatment delay was found to be 24.4 +/- 54.9 days. When the major factors responsible for these delays were examined, patient delay was found to be more frequent in workers, while referral delay was found to be more frequent in patients living in villages (p < 0.05). We determined that referral delay, doctor delay, and total delay increased as the number of doctors who were consulted by patients increased (p < 0.05). Additionally, we determined that diagnostic and treatment delays were more frequent at the early tumour stages in NSCLC patients (p < 0.05). Discussion: The extended length of patient delay underscores the necessity of educating people about lung cancer. To decrease doctor delay, education is a crucial first step. Additionally, to further reduce the diagnostic and treatment delays of chest specialists, multidisciplinary management and algorithms must be used regularly. (C) 2015 Elsevier Ltd. All rights reserved.
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    Patient and doctor delays in the diagnosis and treatment of non-small cell lung cancer in Turkey
    Yurdakul, A; Kocatürk, C; Bayiz, H; Gürsoy, S; Bircan, A; Özcan, A; Akkoçlu, A; Uluorman, F; Çelik, P; Köksal, D; Ulubas, B; Sercan, E; Özbudak, Ö; Göksel, T; Önalan, T; Yamansavci, E; Türk, F; Yuncu, G; Çopuraslan, Ç; Mardal, T; Tuncay, E; Karamustafaoglu, A; Yildiz, P; Seçik, F; Kaplan, M; Çaglar, E; Ortaköylü, M; Önal, M; Turna, A; Hekimoglu, E; Dalar, L; Altin, S; Gülhan, M; Akpinar, E; Savas, I; Firat, N; Çamsari, G; Özkan, G; Çetinkaya, E; Kamiloglu, E; Çelik, B; Havlucu, Y