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NOTES ON THE RESCALED SASAKI TYPE METRIC ON THE COTANGENT BUNDLE

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Acta Mathematica Scientia 2014年第1期34卷 162-174页

作者： aydin gezer Murat ALTUNBAS Department of Mathematics Faculty of Science Ataturk University Department of Mathematics Faculty of Science and Art Erzincan University

Let （M, g） be an n-dimensional Riemannian manifold and T＊M be its cotan-gent bundle equipped with the rescaled Sasaki type metric. In this paper, we firstly study the paraholomorphy property of the rescaled Sasaki type metric by using some compati-ble paracomplex structures on T＊M. Second, we construct locally decomposable Golden Riemannian structures on T＊M . Finally we investigate curvature properties of T＊M .

关键词： almost paracomplex structure cotangent bundle Golden structure paraholomorphic tensor field Riemannian curvature tensor scalar curvature

Geometry of the Second-Order Tangent Bundles of Riemannian Manifolds

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Chinese Annals of Mathematics,Series B 2017年第4期38卷 985-998页

作者： aydin gezer Abdullah MAGDEN Department of Mathematics Ataturk University Erzurum 25240 Turkey.

Let(M,g) be an n-dimensional Riemannian manifold and T^2M be its secondorder tangent bundle equipped with a lift metric g. In this paper, first, the authors construct some Riemannian almost product structures on(T^2M, g) and present some results concerning these structures. Then, they investigate the curvature properties of(T^2M, g).Finally, they study the properties of two metric connections with nonvanishing torsion on(T^2M, g): The H-lift of the Levi-Civita connection of g to T^2M, and the product conjugate connection defined by the Levi-Civita connection of g and an almost product structure.

关键词：黎曼流形二阶产品结构几何线丛连接度量切丛

On Affine Connections Induced on the(1,1)-Tensor Bundle

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Chinese Annals of Mathematics,Series B 2018年第4期39卷 683-694页

作者： Murat ALTUNBAS aydin gezer Department of Mathematics Erzincan University Department of Mathematics Ataturk University

Let M be an n-dimensional differentiable manifold with an affine connection without torsion and T_1~1(M) its(1, 1)-tensor bundle. In this paper, the authors define a new affine connection on T_1~1(M) called the intermediate lift connection, which lies somewhere between the complete lift connection and horizontal lift connection. Properties of this intermediate lift connection are studied. Finally, they consider an affine connection induced from this intermediate lift connection on a cross-section σ_ξ(M) of T_1~1(M) defined by a(1, 1)-tensor field ξ and present some of its properties.

关键词：连接仿射肌电梯剖面图定义性质扭转

Distinguished Connections on Finsler Algebroids

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Chinese Annals of Mathematics,Series B 2021年第1期42卷 41-68页

作者： Esmaeil PEYGHAN aydin gezer Inci GULTEKIN Department of Mathematics Faculty of ScienceArak UniversityArak38156-8-8349Iran Ataturk University Faculty of ScienceDepartment of Mathematics25240ErzurumTurkey

Considering the prolongation of a Lie algebroid,the authors introduce Finsler algebroids and present important geometric objects on these *** endomorphisms like conservative and Barthel,Cartan tensor and some distingu... 详细信息

关键词： Chern-Rund connection Distinguished connections Finsler algebroid Hashiguchi connection Lie algebroid

On the Geometry of the(1,1)-Tensor Bundle with Sasaki Type Metric

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Chinese Annals of Mathematics,Series B 2011年第3期32卷 369-386页

作者： Arif SALIMOV aydin gezer Department of Mathematics Faculty of ScienceAtaturk University

Curvature properties are studied for the Sasaki metric on the(1,1) tensor bundle of a Riemannian *** an application,examples of almost para-Nordenian and para-Khler-Nordenian B-metrics are constructed on the(1,1) tensor bundle by looking at the Sasaki ***,with respect to the para-Nordenian B-structure,paraholomorphic conditions for the complete lifts of vector fields are analyzed.

关键词：几何形状公制类型张量黎曼流形应用程序超结构向量场

Effects of wood species and retention levels on removal of copper,chromium,and arsenic from CCA-treated wood using sodium hypochlorite

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Journal of Forestry Research 2016年第2期27卷 433-442页

作者： Engin Derya gezer Paul A.Cooper Department of Forest Industry Engineering Karadeniz Technical University61080 TrabzonTurkey Faculty of Forestry University of Toronto33 Willcocks St.TorontoON M5S 3B3Canada

Chemical extraction, bioremediation, and electrodialytic processes have been extensively studied for removal of copper, chromium, and arsenic from wood treated with chromated copper arsenate （CCA）. However, one problem has not been addressed： the effects of wood species and retention levels on remediation efficiency. The objectives of this study were to investigate the effects of wood species and retention levels on removal of copper, chromium, and arsenic from CCA-treated wood samples using sodium hypochlorite. Our results showed that sodium hypochlorite （NaOC1） was very effective for removal of copper, chromium, and arsenic from CCA-C treated milled wood samples for all three species used in this study. The Cu, Cr, and As extraction efficiencies for red pine were 95 % Cu, 97 % Cr and 94 % As, for maple were 95 % Cu, 97 % Cr, and 98 % As at 4.0 kg m-3 retention levels, and for aspen were 95 % Cu, 92% Cr, and 91% As at 9.6 kg m-3 retention level, respectively. However, the results showed that wood species and initial retention levels of CCA-treated wood products played very impor- tant roles in terms of removal of Cu, Cr, and As.

关键词： Chromated copper arsenate (CCA) Remediation Remediation efficiency Wood species Retention level

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土耳其语与汉语中含“牛”成语的对比

土耳其语与汉语中含“牛”成语的对比

作者：哈桑（gezer HASAN MERT）华东师范大学

学位级别：硕士

成语在适当使用时会使沟通变得生动而高效,但当交谈双方中的任何一方不能够很好理解对方使用的成语的意义时,交流便会受阻。作为一名土耳其的汉语学习者,笔者感触尤深。基于此,本研究围绕土耳其语和汉语两种语言中含“牛”字的成语展开... 详细信息

成语在适当使用时会使沟通变得生动而高效,但当交谈双方中的任何一方不能够很好理解对方使用的成语的意义时,交流便会受阻。作为一名土耳其的汉语学习者,笔者感触尤深。基于此,本研究围绕土耳其语和汉语两种语言中含“牛”字的成语展开。本文共涉及包括十七个土耳其语成语和三十八个汉语成语在内的共计五十五个成语条目。土耳其语成语的标准解释参见《?rnekleriyle Büyük Deyimler S?zlü?ü》(成语例句大辞典),针对汉语成语,则使用了《汉语成语分类大辞典》。本研究是考察土耳其语和汉语含“牛”字成语的异同的一项跨语言研究。为达研究目的,本研究采用描写与解释相结合的方法、对比分析法和半结构式访谈法等定性研究方法。在研究中,首先通过比对分析该含有“牛”字的成语在词典中的释义及其在语用层面的具体用法和其所烘托的情绪气氛,而后辅以对上述成语的分析比较,冀图由此揭示两种语言的相同与差异所在,并试图挖掘解释这些异同的原因。访谈旨在考察以土耳其语为母语的汉语学习者对汉语含“牛”成语认知情况。研究由学习者是否能理解“牛”字成语的含义的分析切入,在其理解出现偏差的情况下,对有可能阻碍学习者对该成语理解的因素进行了考察;在其理解未出现偏差的情况下,学习者能否母语中相对应的表达便成为了考察重点。对于已经具备了对于目的语言知识完整体系化了解的学习者,考察重点位于对于成语基于情境考量的具体正确使用上。研究发现,两种语言中含“牛”字的成语在语义、语用方面并不具有相似性,外语学习者对成语的理解和使用普遍存在困难。

关键词：土耳其语汉语含“牛”成语中外语言对比

Frequency of hepatic steatosis and its association with the pneumonia severity score on chest computed tomography in adult COVID-19 patients

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World Journal of Critical Care Medicine 2021年第3期10卷 47-57页

作者： Mehmet Tahtabasi Tugrul Hosbul Ergin Karaman Yasin Akin Nihat Kilicaslan Mehmet gezer Fatih Sahiner Department of Radiology University of Health ScienceMehmet Akif Inan Education and Research HospitalSanliurfa 63000Turkey Department of Medical Microbiology Gulhane Medical FacultyUniversity of Health SciencesAnkara 06100Turkey

BACKGROUND Recent studies of the coronavirus disease 2019(COVID-19)demonstrated that obesity is significantly associated with increased disease severity,clinical outcome,and *** association between hepatic steatosis,which frequently accompanies obesity,and the pneumonia severity score(PSS)evaluated on computed tomography(CT),and the prevalence of steatosis in patients with COVID-19 remains to be *** To assess the frequency of hepatic steatosis in the chest CT of COVID-19 patients and its association with the *** The chest CT images of 485 patients who were admitted to the emergency department with suspected COVID-19 were retrospectively *** patients were divided into two groups as COVID-19-positive[CT-and reverse transcriptase-polymerase chain reaction(RT-PCR)-positive]and controls(CT-and RT-PCR-negative).The CT images of both groups were evaluated for PSS as the ratio of the volume of involved lung parenchyma to the total lung *** steatosis was defined as a liver attenuation value of≤40 Hounsfield units(HU).RESULTS Of the 485 patients,56.5%(n=274)were defined as the COVID-19-positive group and 43.5%(n=211)as the control *** average age of the COVID-19-positive group was significantly higher than that of the control group(50.9±10.9 years vs 40.4±12.3 years,P<0.001).The frequency of hepatic steatosis in the positive group was significantly higher compared with the control group(40.9%vs 19.4%,P<0.001).The average hepatic attenuation values were significantly lower in the positive group compared with the control group(45.7±11.4 HU vs 53.9±15.9 HU,P<0.001).Logistic regression analysis showed that after adjusting for age,hypertension,diabetes mellitus,overweight,and obesity there was almost a 2.2 times greater odds of hepatic steatosis in the COVID-19-positive group than in the controls(odds ratio 2.187;95%confidence interval:1.336-3.580,P<0.001).CONCLUSION The prevalence of hepatic steatosis was significantly highe

关键词： Liver Steatosis COVID-19 Computed tomography Pneumonia severity score

土耳其旅游目的地品牌个性研究 ——以中国游客为例

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土耳其旅游目的地品牌个性研究 ——以...

作者：张亦飞（gezer OMER）陕西师范大学

学位级别：硕士

对旅游目的地品牌竞争而言,如何创造出具有差异性的品牌,与竞争对手形成有效区分,品牌个性打造至关重要。除此之外,旅游目的地全球营销,了解不同国家或地区的文化差异,针对不同文化背景下的游客开发出独具吸引力的旅游产品,也成为各个... 详细信息

对旅游目的地品牌竞争而言,如何创造出具有差异性的品牌,与竞争对手形成有效区分,品牌个性打造至关重要。除此之外,旅游目的地全球营销,了解不同国家或地区的文化差异,针对不同文化背景下的游客开发出独具吸引力的旅游产品,也成为各个国家或地区旅游发展的关键任务。近年来,中国出境旅游逐年增长,各个国家不断加强对中国旅游市场的开发,以吸引更多中国游客。为此,本研究以中国游客为研究对象,通过问卷调查的方式,来探究中国游客对土耳其旅游目的地品牌个性的感知,为土耳其吸引中国游客,拓宽中国市场寻求策略。具体而言,本研究意欲明晰如下几个问题:（1）对于中国游客而言,土耳其旅游目的地品牌个性的维度有哪些?（2）对于品牌个性维度而言,探究从中国品牌个性维度中选择的个性特征是否出现于土耳其旅游目的地的品牌个性维度中（3）对于中国和土耳其两个国家而言,其各自的品牌个性量表是否适用于各自的旅游业?（4）对土耳其旅游发展而言,探究中国旅游者的行为特征可以为相关旅游部门提供哪些有效的管理建议?为了科学客观地回答上述问题,研究者于2019年6月30日至7月17日之间,在土耳其伊斯坦布尔国际机场采用随机抽样的方式向中国游客发放一部分问卷,另外一部分问卷则委托伊斯坦布尔的Flex旅游社于2019年7月26日至8月26日之间,根据各旅游团规模的大小进行发放填写,两次共发放问卷425份,最终获得有效问卷336份,使用数理统计等量化研究方法对问卷数据进行描述性统计分析、信度,效度检验、探索性因子分析与验证性因子分析,据此探讨中国游客对土耳其旅游目的地品牌个性的感知状况。研究实施的具体步骤为:第一,研究者对品牌概念、品牌个性研究、旅游目的地品牌个性研究、国内外旅游目的地品牌个性维度的研究进行了文献收集与梳理,并构建土耳其旅游目的地品牌个性量表;第二,研究者在问卷发放与填写的基础上进行数据收集,并运用数理统计等方法对问卷数据进行相应分析,得出土耳其旅游目的地品牌个性维度并进项检验;第三,在所得结论的基础上综合以往的研究成果进行相应的理论与实践方面的补充与扩展。所得结论具体如下:（1）前往土耳其旅游的中国旅游者人口统计学特征和行为特征在性别比例上,女性比例为64.3%,男性比例为35.7%;在年龄上,主要集中在25岁和54岁之间;在受教育程度上,具有本科学历的旅游者最多,其次大专和硕士旅游者;在职业上,以私企/外企人员、专业/文教技术人员（医生/律师等）、学生和自由职业者为主;在月收入上,旅游者的月收入主要集中在5001元-8001元以上之间。在出行方式上,83.3%旅游者选择跟团游;在停留时间上,旅游者在土耳其至少停留2周;在游次数上,大部分旅游者第一次来土耳其游:在旅游信息获取方式上,旅行社和网络是旅游者获取信息的主要方式;在旅游动机上,旅游者主要有三种旅游动机,分别是休闲,娱乐动机、放松动机、获取知识,学习动机。（2）土耳其旅游目的地品牌个性分为五个维度根据探索性因子分析的结果显示,土耳其旅游目的地品牌个性分为五个维度,分别是强势的、有吸引力的、易亲近的、有能力的和快乐的。且土耳其旅游目的地品牌个性与强势的、有吸引力的、易亲近的、有能力的、快乐的显著相关（γ=0.573,p＜0.001、γ=0.734,p＜0.001、γ=0.948,p＜0.01、γ=0.463,p＜0.001、γ=0.580,p＜0.001）。（3）土耳其旅游目的地品牌个性量表由十九个形容词组成通过对验证性因子分析的结果显示,土耳其旅游目的地品牌个性的五个维度由十九个形容词组成,各个维度与其对应的形容词具有显著关系。细化而言:强势的与领导者、果断的、经济的、娴熟的和成熟的显著相关（γ=0.694,p＜0.001、γ=0.645,p＜0.001、γ=0.607,p＜0.01、γ=0.604,p＜0.001、γ=0.592,p＜0.001）;有吸引力的与自然的、浪漫的、友善的、美丽的显著相关（γ=0.690,p＜0.001、γ=0.710,p＜0.001、γ=0.675,p＜0.01、γ=0.543,p＜0.001）;易亲近的与知名的、平易近人的、有品位的、热情的、平和的显著相关（γ=0.578,p＜0.001、γ=0.650,p＜0.001、γ=0.538,p＜0.01、γ=0.681,p＜0.001、γ=0.624,p＜0.001）;有能力的与专业的、成功的、沉稳的显著相关（γ=0.880,p＜0.001、γ=0.749,p＜0.001、γ=0.722,p＜0.01）;快乐的与开朗的、欢乐的显著相关（γ=0.756,p＜0.001、γ=0.851,p＜0.001）。此外,本研究尝试在以下几方面进行突破创新:（1）弥补国内从中国旅游者的角度进行土耳其旅游目的地品牌个性研究的空白。（2）首次在土耳其和中国品牌个

关键词：旅游目的地品牌个性中国旅游者品牌个性维度土耳其