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A NOTE ON INEXTENSIBLE FLOWS OF CURVES WITH FERMI-WALKER DERIVATIVE IN GALILEAN SPACE G<sub>3</sub>
( Hülya Güun Bozok ),( Îpek Nîzamettîn Sertkol ) 호남수학회 2020 호남수학학술지 Vol.42 No.4
In this paper, Fermi-Walker derivative for inextensible flows of curves are researched in 3-dimensional Galilean space G<sub>3</sub>. Firstly using Frenet and Darboux frame with the help of Fermi- Walker derivative a new approach for these ows are expressed, then some results are obtained for these flows to be Fermi-Walker transported in G<sub>3</sub>.
The Role of Extra-Anatomic Bypass in the Surgical Treatment of Acute Abdominal Aortic Occlusion
Gokhan Ilhan,Şahin Bozok,Şaban Ergene,Sedat Ozan Karakisi,Nebiye Tufekci, M.D.,Hızır Kazdal,Sabri Ogullar,Seref Alp Kucuker 대한흉부외과학회 2015 Journal of Chest Surgery (J Chest Surg) Vol.48 No.3
Background: Aortic occlusion is rare catastophic pathology with high rates of mortality and severe morbidity. In this study, we aimed to share our experience in the management of aortic occlusion and to assess the outcomes of extra-anatomic bypass procedures. Methods: Eighteen patients who had undergone extra-anatomic bypass interventions in the cardiovascular surgery department of our tertiary care center between July 2009 and May 2013 were retrospectively evaluated. All patients were preoperatively assessed with angiograms (conventional, computed tomography, or magnetic resonance angiography) and Doppler ultrasonography. Operations consisted of bilateral femoral thromboembolectomy, axillo-bifemoral extra-anatomic bypass and femoropopliteal bypass and were performed on an emergency basis. Results: In all patients during early postoperative period successful revascularization outcomes were obtained; however, one of these operated patients died on the 10th postoperative due to multiorgan failure. The patients were followed up for a mean duration of 21.2±9.4 months (range, 6 to 36 months). Amputation was not warranted for any patient during postoperative follow-up.. Conclusion: To conclude, acute aortic occlusion is a rare but devastating event and is linked with substantial morbidity and mortality in spite of the recent advances in critical care and vascular surgery. Our results have shown that these hazardous outcomes may be minimized and better rates of graft patency may be achieved with extra-anatomic bypass techniques tailored according to the patient.
Duman, Fatih,Urey, Erkan,Temizgul, Ridvan,Bozok, Fuat The Korean Society of Weed Science and The Turfgra 2010 Weed Biology and Management Vol.10 No.2
To assess its response to the herbicide, tribenuron-methyl, samples of Nasturtium officinale were exposed to 0, 0.01, 0.05, 0.1, and 0.5 $mg\;L^{-1}$ of tribenuron-methyl for 1, 2, 4 and 7 days. The influence of this herbicide on the relative growth rate, electrolyte leakage, lipid peroxidation, photosynthetic pigmentation, protein content, and performance of anti-oxidant enzymes, such as superoxide dismutase (SOD), catalase, and ascorbate peroxidase (APX), was examined. The results indicated that tribenuron-methyl, applied at 0.5 $mg\;L^{-1}$, affected plant growth negatively. It also was determined that chlorophyll a is the most responsive photosynthetic pigment to tribenuron-methyl exposure. Under stress conditions, the anti-oxidant enzymes were up-regulated compared to the control. The SOD activity was significantly stimulated, while the activity of APX was inhibited. A significant correlation was found between lipid peroxidation and SOD activity. The exposure period and herbicide concentration had significant effects on the biological responses against tribenuron-methyl stress. These results may be useful for clarifying the effect of herbicides on non-target aquatic plants.
Translation surfaces in pseudo-Galilean space with prescribed mean and Gaussian curvatures
Sezin Aykurt Sepet,Muhittin Evren Aydin,Hulya Gun Bozok 호남수학회 2022 호남수학학술지 Vol.44 No.1
We study the translation surfaces in the pseudo--Galilean space with the condition that one of generating curves is planar. We classify these surfaces whose mean and Gaussian curvatures are functions of one variable.