Examination of non-homogeneity and lamination scheme effects on deflections and stresses of laminated composite plates

Ferruh Turan,Zihni Zerin,Muhammed Fatih Başoğlu 국제구조공학회 2016 Structural Engineering and Mechanics, An Int'l Jou Vol.57 No.4

In this study, a convenient formulation for the bending of laminated composite plates that hold non-homogeneous properties is examined. The constitutive equations of first order shear deformation plate theory are obtained using Hamilton Principle. The effect of non-homogeneity, lamination schemes and aspect ratio on the deflections and stresses is analysed. It is understood from the study that economical and optimum designs for laminated composite plates can be achieved by changing lamination scheme and by considering non-homogeneity response of composite plate.

TÜRK KİMLİĞİNE ASIRLARDIR YOL GÖSTEREN ÜÇ KAYNAK

Ferruh Arslan 국제언어문학회 2017 國際言語文學 Vol.- No.36

Prostate Cancer Incidence in Turkey: An Epidemiological Study

Zorlu, Ferruh,Divrik, Rauf Taner,Eser, Sultan,Yorukoglu, Kutsal Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.21

Background: This study aimed to determine the incidence of prostate cancer in Turkey in a population-based sample, and to determine clinical and pathological characteristics of the cases. Materials and Methods: All newly diagnosed prostate cancer patients were included in this national, multi-centered, prospective and non-interventional epidemiological registry study conducted in 12 cities representing the 12 regions of Turkey from July 2008 to June 2009. The population-based sample comprised 4,150 patients with a recent prostate cancer diagnosis. Results: Age-adjusted prostate cancer incidence rate was 35 cases per 100,000 in Turkey. At the time of diagnosis, median age was 68, median PSA level was 10.0 ng/mL. Digital rectal examination was abnormal in 36.2% of 3,218 tested cases. Most patients had urologic complaints. The main diagnostic method was transrectal ultrasound guided biopsy (87.8%). Gleason score was ${\leq}6$ in 49.1%, 7 in 27.8% and >7 in 20.6% of the cases. There was a statistically significant positive correlation between serum PSA level and Gleason score (p=0.000). The majority of patients (54.4%) had clinical stage T1c. Conclusions: This is the first population-based national data of incidence with the histopathological characteristics of prostate cancer in Turkey. Prostate cancer remains an important public health concern in Turkey with continual increase in the incidence and significant burden on healthcare resources.

수 세기 동안 터키 정체성에 길을 제시해준 세 작품

페루흐 아르슬란(Ferruh Arslan) 국제언어문학회 2017 國際言語文學 Vol.- No.36

수백 년 동안 터키 문화의 근원이 되고, 빛을 비춰준 많은 작품들 사이에서 “오르훈 비문”, “데데 코르쿠트 서사시” 그리고 “투다드그 빌리그”는 가장 중요한 위치를 차지하는 작품으로 부각된다. 이 작품들에는 이야기, 서사시, 관용구 그리고 속담들로 만들어진 행동의 틀이 기록되어 있다. 터키 문화의 근원인 이 작품들은 민족을 형성하는 개인들 간의 관계뿐 만 아니라 공동체 그리고 이웃 나라들과의 관계를 확연하게 우리 눈 앞에 펼쳐 보이고 있다. 터키문학사에 지극히 중요한 이 세 작품은 도덕, 정치, 개인, 질서 그리고 사회 생활개념에 관한 것이며, 공동체 안에 있는 개인에서 시작해 가장 높은 국가 지도자에 이르기까지 많은 소재를 다루고 있다. 도덕 그리고 정치 생활과 관련된 심문들을 일반적인 철학 안에서 평가했을 뿐 만 아니라, 공동체 안에서의 정치적, 사회적, 문화적, 종교적인 면 등의 관점에 의거하여 평가하기도 했다. 공동체가 제시한 가치 판단들과 법 규율, 그들의 세계관에 대해서도 우리에게 지식을 전달한다. 역사적인 과정을 보면 이슬람 이전과 이후에도 위에서 언급했던 작품들이 국가의 전통 안에서 중요한 위치에 있었다고 말할 수 있다. Yolun Başlangıcı, Dede Korkut Hikâyeleri, Kutadgu Bilig are most importantworks among the so many works which are sources of Turkish culture in the Turkish cultural history. These three works are about morale, politics, individual, order and social life, that is, from individuals in the community to national leaders. “Yolun Başlangıcı” was discovered in the Yolun vally of Mongol. “Yolun Başlangıcı” is an epitaph in the Guikturkey period. The main tribe of the Hun tribes is Tukui, that is, Turki. “Dede Korkut Hikâyeleri” is most important text in the Turkish cultural frame. It was passed down orally and established by letters in the 15 century. Because “Dede Korkut Hikâyeleri” has given all kinds of informations about social lives, customs, advices from the beginning, also recently has the sources in the Turkish movies, theaters, short stories, novels, poems, musics and cartoons, It is one of the very important works. “Kutadgu Bilig” is one of the very important works written after the acceptance of Islam. It has not only literary value but also historical value.

Economic Crisis and Managers' Behavior: Planned Behavioral Theory Approach

Gokhan Cinar,Ferruh Isin,Adnan Hushmat 한국유통과학회 2016 KODISA ICBE (International Conference on Business Vol.2016 No.-

The purpose of this study is to put forward the behavioral trends of the trading firms in the face of economic crisis. A questionnaire study is conducted to 167 firms and their behavioral aspects in crisis period is modeled using planned behavioral theory. The empirical analysis is conducted using Structural Equation Models (SEM). The findings show that the subjective norms and perceptions effect self-confidence and decisions. The results may help in taking necessary measures for operational continuity of the firms in a more rational environment.

How Managers React to Crisis?: A Planned Behavior Theory Approach

Gokhan Cinar,Ferruh Isin,Adnan Hushmat 한국유통과학회 2016 Asian Journal of Business Environment (AJBE) Vol.6 No.4

Purpose - Not all firms are able to completely eliminate the risk arising out of the crisis. Success hides in the ability to perceive the market expectations accurately and take correct decisions. This study aims to analyze the firms’ decisions at gross-root level. Research Design, Data, and Methodology - Primary data is obtained with the help of specially designed questionnaires from the agriproducts export firms that are members of export union of Turkey. The study is based on four theoretical structures: general planned behavior theory model, perception-leading behavior control and subjective norm model, perceived-behavioralcontrol leading perception and subjective norm models, and perceptions and subjective norms leading behavior control model. Structural Equation Models (SEM) is used to conduct the empirical analysis. Results - The findings show perceptions and subjective norms leading behavior control model as the best one, concluding that the environmental pressures and positive perceptions have significant effect on the strategic decisions of the agriproducts export firms. Conclusion - Policy tools like creating positive perception in the markets, providing sufficient information and financial support to the firms and increasing market competition can be used effectively to achieve the said objective.

Cylotomic function fields over finite fields with class number three

Mehpare Bilhan,Dilek Buyruk,Ferruh Ozbudak 대한수학회 2019 대한수학회지 Vol.56 No.2

We list all subfields of cyclotomic function fields over rational function fields with class number three. We also determine all the imaginary abelian extensions with relative class number three, explicitly.

Curvilinear free-edge form effect on stability of perforated laminated composite plates

Zihni Zerin,Muhammed Fatih Başoğlu,Ferruh Turan 국제구조공학회 2017 Structural Engineering and Mechanics, An Int'l Jou Vol.61 No.2

In this study, self-supporting roofing elements especially convenient for large-span structures such as stadium, airport terminal, mall, coliseum, etc. were examined with respect to critical buckling load. These elements were assumed as laminated composite plates and, variation of free-edge forms, cutout types and lamination configurations were used as design parameters. Based on the architectural feature and structural requirements, the effects of curvilinear free-edge form on critical buckling load were focused on in this research. Within this scope, 14 types of lamination configuration were specified according to various orientation angle, number and thickness of plies with a constant value of total plate thickness. Besides that, 6 different types of cutout and 3 different free-edge forms were determined. By combining all these parameters 294 different critical buckling load analyses were performed by using ANSYS Mechanical software based on finite element method. Effects of those parameters on critical buckling load were evaluated referring to the obtained results. According to the results presented here, it may be concluded that lamination conditions have more significant influence on the critical buckling load values than the other parameters. On the other hand, it is perceived that curvilinear free-edge forms explicitly undergo changings depending on lamination conditions. For future work, existence of delamination might be considered and progression of the defect could be investigated by using non-linear analysis.

Effect of high-fat diet on the various morphological parameters of the ovary

Gö,ren Hilal,Topal Fatma,Yü,cel Ferruh,Gü,ler Sabire,Aydar Yü,ksel 대한해부학회 2020 Anatomy & Cell Biology Vol.53 No.1

Increased food consumption rich in fat and carbohydrate and sedentary lifestyle have seriously increased the rates of obesity and obesity-associated diseases in developed countries. Female mice with diet-induced obesity exhibit infertility and thus can serve as a model for human polycystic ovary syndrome. The aim of the present study was to examine how ovary is affected by diet-induced obesity. The effects of high-fat diet (HFD) on ovary morphology in mice fed with HFD were investigated using unbiased stereological methods. The ovary of mice fed with HFD (n=8, C1090-60, Altromine) for 9 weeks, were compared with that of mice fed with standard chow diet (n=8, C1090-10, Altromine). Stereological parameters were obtained in diestrus cycle. The samples were processed through routine and standard paraffin embedding and were serially sectioned in 5-μm thickness then, every 10th section was saved, stained with Crossman’s triple stain for counting and measuring. In all sampled sections mean follicle numbers, diameters, total ovarian volume cortex to medulla ratio (Vv), ovum to cell ratio in secondary follicle were examined in all sampled sections. The present results showed that weight of ovarian and amount of intraperitoneal adipose tissue and the body weight markedly increased in obese mice when compared with control groups. Moreover, follicle numbers (except primordial follicles) and diameters were significantly increased in obese mice. Cortex to medulla ratio (Vv) and ovum to cell ratio in secondary follicle were also considerably different between experimental and the control groups. The present findings indicate that obesity adversely affects overall ovarian morphology.

CYLOTOMIC FUNCTION FIELDS OVER FINITE FIELDS WITH CLASS NUMBER THREE

Bilhan, Mehpare,Buyruk, Dilek,Ozbudak, Ferruh Korean Mathematical Society 2019 대한수학회지 Vol.56 No.2

We list all subfields of cyclotomic function fields over rational function fields with class number three. We also determine all the imaginary abelian extensions with relative class number three, explicitly.