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10篇 您的检索式:作者名="Abdullah Demir"
    题名 作者 年代 出处 被引量
1Prognostic significance of primary tumor localization in stage Ⅱ and Ⅲ colon cancer显示文摘IM To investigate the effects of tumor localization on disease free survival(DFS) and overall survival(OS) in patients with stage Ⅱ-Ⅲ colon cancer.METHODS This retrospective study included 942 patients with stage Ⅱ and Ⅲ colon cancer, which were followed up in our clinics between 1995 and 2017. The tumors from the caecum to splenic flexure were defined as right colon cancer(RCC) and those from splenic flexure to the sigmoid colon as left colon cancer(LCC).RESULTS The median age of the patients was 58 years(range: 19-94 years). Male patients constituted 54.2%. The rates of RCC and LCC were 48.4%(n = 456) and 51.6%(n = 486), respectively. During the median follow-up of 90 mo(range: 6-252 mo), 14.6% of patients developed recurrence and 9.1% of patients died. In patients with stage Ⅱ and Ⅲ disease with or without adjuvant therapy, DFS was similar in terms of primary tumor localization(stage Ⅱ; P = 0.547 and P = 0.481, respectively; stage Ⅲ; P = 0.976 and P = 0.978, respectively). In patients with stage Ⅱ and Ⅲ disease with or without adjuvant therapy, OS was not statistically significant with respect to primary tumor localization(stage Ⅱ; P = 0.381 and P = 0.947, respectively; stage Ⅲ; P = 0.378 and P = 0.904, respectively). The difference between median OS of recurrent RCC(26 ± 6.2 mo) and LCC(34 ± 4.9 mo) cases was eight months(P = 0.092).CONCLUSION Our study showed no association of tumor localization with either DFS or OS in patients with stage Ⅱ or Ⅲ colon cancer managed with or without adjuvant therapy. However, post-recurrence OS appeared to be worse in RCC patients.Abdullah Sakin Serdar Arici Saban Secmeler Orcun Can Caglayan Geredeli Nurgul Yasar Cumhur Demir Osman Gokhan Demir Sener Cihan 2018World Journal of Gastrointestinal Oncology2018,10,11:1
2Analyzing dynamic curve widening on forest roads显示文摘Forest roads require important design specifications to ensure all-season access for various vehicles. Long and heavy log trucks can face serious maneuvering problems on forest roads due to insufficient amount of area to the left for road widening on horizontal curves. In order to provide safe and continuous shipment and transportation,appropriate curve widening areas should be provided for long vehicles along horizontal curves. In this study, a statistical model was developed to provide curve-widening solutions for long trucks(e.g., those with 18 wheels) considering various curve radius and deflection angles. The dynamic curve widening feature of Plateia 2013 program was employed to calculate curve widening for the specified vehicle. During the solution process, nine different horizontal curve diameters from 10 to 50 m(by 5 m intervals)and 17 different deflection angles from 90° to 170°(by 5°intervals) were evaluated to run horizontal curve-widening analysis. Using a multiple regression model, we made suitable predictions about curve widening. The curvewidening areas decrease as the horizontal curve radius increases, while increasing the deflection angle on horizontal curves increases curve widening areas. Clearly, the computer-based dynamic curve widening model developed in this study can be effectively used in determining optimum widening for horizontal curves by evaluating the number of alternatives that fit geometrical specifications and vehicle types.Mustafa Akgul Murat Demir Abdullah E.Akay 2017Journal of Forestry Research2017,28,2:1
3A new driver behavior model to create realistic urban traffic environment显示文摘Murat Demir Abdullahavu爧ogluˇ 2012Transportation Research Part F:Psychology and Behavior2012,15,3:1
4Effects of camouflage treatment on dentofacial structures in Class Ⅱ division 1 mandibular retrognathic patients显示文摘Abdullah Demir Tancan Uysal Zafer Sari 2005The European Journal of Orthodontics2005,27,5:1
5Comparison of two different treatment regimens’ efficacy in neovascular age-related macular degeneration in Turkish population—based on real life data-Bosphorus RWE Study Group显示文摘AIM: To compare two different anti-vascular endothelial growth factor(anti-VEGF) treatment regimens'-a priori pro re nata(PRN) and PRN regimen following^(th)e loading phaseanatomical and functional results in neovascular agerelated macular degeneration(n AMD) patients. METHODS: Totally 544 n AMD patients followed and treated with aflibercept(n=135) and ranibizumab(n=409)at 9 different centers between 2013 and 2015 were enrolled into^(th)is retrospective multicenter study. Patients with initial best corrected visual acuity(BCVA) interval of 1.3-0.3(log MAR) and a minimum follow-up of 12 mo were included. Patients under two different regimens-a priori pro re nata(1+PRN) or 3 consecutive intravitreal injections followed by a PRN regimen(3+PRN)-were compared in BCVA at 3^(th), 6^(th) and 12^(th) months, and in central macular^(th)ickness(CMT) at 6^(th) and 12^(th) months. The total study group, intravitreal ranibizumab(IVR) and intravitreal aflibercept(IVA) groups were evaluated separately. RESULTS: The mean CMT decreased in^(th)e 1+PRN(n=101) regimen from 407 to 358 and 340 μm and in^(th)e 3+PRN(n=443) group from 398 to 318 and finally to 310 μm at months 6 and 12, respectively. Anatomically,^(th)e CMT reduction at 6^(th) month(48.5 vs 76.4;P<0.05) was statistically significant in favor of 3+PRN group. BCVA changed in 1+PRN group from 0.77 to 0.78, 0.75 and 0.75;in 3+PRN group from 0.81 to 0.69, 0.72, and 0.76 at months 3, 6, and 12, respectively. Visual gain was statistically better in 3+PRN group at 3^(th) month(-0.01 vs 0.12;P<0.001). In IVR group, CMT reduction was in greater in 3+PRN at 6^(th)(44 vs 72) and 12^(th) month(61 vs 84), but statistically insignificant. The 3+PRN group revealed statistically better visual results at 3^(th) month(-0.02 vs 0.11, P<0.05). In IVA group, although statistically insignificant, CMT reduction(61 vs 89, 6^(th) month;85 vs 97, 12^(th) month) and visual gain(0.02 vs 0.16;0.02 vs 0.14;0.05 vs 0.11) was found in favor of 3+PRN group at all visits.CONCLUSION: The loading dose of anti-VEGF treatments in n AMD leads to significantly better anatomical and functional results, regardless of the agent, specially in early follow-up interval.Burak Erden Selim Bolükbasi Abdullah Ozkaya Levent Karabas Cengiz Alagoz Zeynep Alkin Ozgür Artunay Sadik Etka Bayramoglu Gokhan Demir Mehmet Demir Ali Demircan Gürkan Erdogan Mehmet Erdogan Erdem Eris Havva Kaldirim Ismail Umut Onur Ozen Ayranci Osmanbasoglu Sezin Ozdogan Erkul Mine Oztürk Irfan Perente Kübra Sarici Nihat Sayin Dilek Yasa Ihsan Yilmaz Zeynep Yilmazabdurrahmanoglu 2020International Journal of Ophthalmology(English edition)2020,13,1:1
6Relationship between methyl- ene blue values of concrete aggregate fines and some concrete prop- erties显示文摘Ilker Bekir Topqu Abdullah Demir 2008Canadian Journal of Civil Engineering2008,35,4:1
7A new driver behavior model to create realistic urban traffic environment显示文摘MURAT DEMIR ABDULLAH CAVUSOGLU 2012Trans- portation Research Part F2012,,15:1
8与流固耦合相关的溃坝问题中阻尼的数值及实验研究(英文)显示文摘目的:1.通过全面的实验研究考察阻尼在流固耦合(FSI)问题中的影响作用;2.提出一套光滑粒子流体动力学(SPH)和有限元方法(FEM)相结合的耦合算法,并对流固耦合系统进行数值模拟。创新点:1.通过一系列实验研究惯性驱动问题中阻尼的影响并使用本文提出的数值方法进行验证;2.该数值方法能够在不解耦的情况下对完整系统进行求解。方法:1.构建数值模型模拟流体和弹性结构之间的强烈相互作用;2.利用SPH和FEM对流体和结构分别进行模型化;3.采用接触力学对系统中的流固耦合机理进行建模。结论:1.基于SPH-FEM耦合的FSI模型可成功模拟自由液面形状、橡胶板的位移以及容器壁上的压强;2.模拟结果显示,在连续相互作用的惯性驱动问题中阻尼并不是必要的考虑因素。Abdullah DEMIR Ali Ersin DINCER Zafer BOZKUS Arris S.TIJSSELING 2019Journal of Zhejiang University-Science A(Applied Physics & Engineering)2019,20,4:0
9Single-mode quasi PT-symmetric laser with high power emission显示文摘Large-area lasers are practical for generating high output powers.However,this often comes at the expense of lower beam quality due to the introduction of higher-order modes.Here,we experimentally demonstrate a new type of electrically pumped,large-area edge-emitting lasers that exhibit a high power emission(~0.4 W)and a high-quality beam(M^(2)~1.25).These favorable operational characteristics are enabled by establishing a quasi PT-symmetry between the second-order mode of a large area two-mode laser cavity and that of a single-mode auxiliary partner cavity,i.e.,by implementing a partial isospectrality between the two coupled cavities.This in turn enlarges the effective volume of the higher-order modes.As a result,a selective pump applied via current injection into the main laser cavity can provide a stronger modal gain to the fundamental mode,and thus lead to lasing in the single mode regime after filtering out higher order transverse modes.The reported experimental results confirm this intuitive picture and are in good agreement with both theoretical and numerical analysis.Above all,the employed material platform and fabrication process are compatible with the industrial standards of semiconductor lasers.This work provides the frst clear demonstration,beyond previous proof-of-concept studies,of the utility of PT-symmetry in building laser geometries with enhanced performance and,at the same time,useful output power levels and emission Cndidclerisuics.Enes Seker Babak Olyaeefaro Khalil Dadashi Serdar Sengu Mohammad Hosain Teimourpour Ramy El-Ganainy Abdullah Demir 2023Light(Science & Applications)2023,12,7:0
10The Obsessive Compulsive Disorder Symptoms after the Successful Treatment of the Pineal Germinoma: A Case Report显示文摘Aslihan Okan Ibiloglu Abdullah Atli EsrefAkil Suleyman Demir Mahmut Bulut 2016Journal of Pharmacy and Pharmacology2016,4,3:0
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