The Role of Education on Economic Growth: Evidence from Turkey

Ulker Begum Ishchy 한국국제경제학회 2020 International Economic Journal Vol.34 No.2

This paper examines the short- and long-term impacts of education on Turkey’s economic growth between 1990 and 2018 through two dimensions: Human capital (labour productivity) and innovative capacity. The study draws attention to the quantitative aspects of education showing how employees with different stages (primary, secondary, and tertiary) of education contribute to labour productivity and technological developments in the country. Besides, it also attaches great significance to the qualitative aspects of education which have been largely ignored in the literature. Using the autoregressive distributed lag co-integration technique, the study finds statistically significant short- and long-run impacts running from fractions of employees with maximum secondary and tertiary education qualifications to output growth. It reveals that tertiary education has three-fold long-run impact on economic growth compared to secondary education. The study documents significant long-run impacts of PISA, students per classroom, and students per teacher on economic growth; however, they fail to generate statistically significant impacts on economic growth in the short-run. Thus, the study concludes that intangible values of education can take a longer time to generate tangible outcomes on the economy and the model converges to its long-run equilibrium at a speed of 12%.

The Art of Fiction in Henry James`s The Wings of the Dove

B. Ayca Ulker Erkan 한국헨리제임스학회 2003 헨리 제임스 연구 Vol.- No.7,8

TURKEY

쉐브넴, 월케르 한국민족연구원 2003 민족연구 Vol.0 No.11

터키의 건국자인 Ataturk에 의해 선언된 터키민족 개념은 다양한 내부적인 인종이나 종교적인 다원성을 의미하는 것이다. 이러한 터키 공화국의 건국 이념에 따라 터키 내의 소수민족인 아르메니아인, 유대인, 룸인이 비교적 평화적인 다문화 공존의 터전을 유지시켜 가고 있다.

Harmonic differential quadrature (HDQ) for axisymmetric bending analysis of thin isotropic circular plates

Civalek, Omer,Ulker, Mehmet Techno-Press 2004 Structural Engineering and Mechanics, An Int'l Jou Vol.17 No.1

Numerical solution to linear bending analysis of circular plates is obtained by the method of harmonic differential quadrature (HDQ). In the method of differential quadrature (DQ), partial space derivatives of a function appearing in a differential equation are approximated by means of a polynomial expressed as the weighted linear sum of the function values at a preselected grid of discrete points. The method of HDQ that was used in the paper proposes a very simple algebraic formula to determine the weighting coefficients required by differential quadrature approximation without restricting the choice of mesh grids. Applying this concept to the governing differential equation of circular plate gives a set of linear simultaneous equations. Bending moments, stresses values in radial and tangential directions and vertical deflections are found for two different types of load. In the present study, the axisymmetric bending behavior is considered. Both the clamped and the simply supported edges are considered as boundary conditions. The obtained results are compared with existing solutions available from analytical and other numerical results such as finite elements and finite differences methods. A comparison between the HDQ results and the finite difference solutions for one example plate problem is also made. The method presented gives accurate results and is computationally efficient.

HDQ-FD integrated methodology for nonlinear static and dynamic response of doubly curved shallow shells

Civalek, Omer,Ulker, Mehmet Techno-Press 2005 Structural Engineering and Mechanics, An Int'l Jou Vol.19 No.5

The non-linear static and dynamic response of doubly curved thin isotropic shells has been studied for the step and sinusoidal loadings. Dynamic analogues Von Karman-Donnel type shell equations are used. Clamped immovable and simply supported immovable boundary conditions are considered. The governing nonlinear partial differential equations of the shell are discretized in space and time domains using the harmonic differential quadrature (HDQ) and finite differences (FD) methods, respectively. The accuracy of the proposed HDQ-FD coupled methodology is demonstrated by the numerical examples. Numerical examples demonstrate the satisfactory accuracy, efficiency and versatility of the presented approach.

Skin Findings in Newborns and Their Relationship with Maternal Factors: Observational Research

( Ozlem Ekiz ),( Ulker Gul ),( Leyla Mollamahmutoglu ),( Muzeyyen Gonul ) 대한피부과학회 2013 Annals of Dermatology Vol.25 No.1

Background: Cutaneous lesions are commonly seen in the newborn period and exhibit inconsistency from the skin lesions of an adult. Objective: The present study was carried out with an aim to determine the frequency of physiologic and pathologic cutaneous findings in newborns. Methods: Typically, 1234 newborns were included in this study. A questionnaire about maternal gestational history, maternal and family history was issued to the parents of each newborn. The presence of cutaneous lesions was recorded. Results: Overall, 642 (52%) of the newborns were male and 592 (48%) were female. Typically, 831 newborns (67.3%) had at least one cutaneous lesion. The prevalence of genital hyperpigmentation and milia was significantly higher in males. In premature newborns, the pervasiveness of cutis marmorata and genital hyperpigmentation was found to be significantly higher. Caput succedaneum, transient neonatal pustular melanosis and cyanosis appeared predominantly in vaginally born infants. Erythema toxicum neonatorum was seen in infants, who were born by cesarean section. The predominance of Mongolian spots and erythema toxicum neonatorum were significantly higher in the newborns of the multiparous mothers; however, caput succedaneum was significantly higher in newborns of the primiparous mothers. Conclusion: A number of studies about neonatal dermatoses have been carried out involving different methods in various countries. We consider that our study may be useful in literature, as it has been carried out involving large number of maternal parameters. (Ann Dermatol 25(1) 1∼4, 2013)

HDQ-FD integrated methodology for nonlinear static and dynamic response of doubly curved shallow shells

Omer Civalek,Mehmet Ulker 국제구조공학회 2005 Structural Engineering and Mechanics, An Int'l Jou Vol.19 No.5

Win at All Costs or Lose Gracefully in High-Stakes Competition? Gender Differences in Professional Tennis

Anbarci, Nejat,Lee, Jungmin,Ulker, Aydogan SAGE Publications 2016 JOURNAL OF SPORTS ECONOMICS Vol.17 No.4

<P>This article examines line-call challenges by male and female professional tennis players in major tournaments around the world. In terms of utilization rates, we find that the genders behave similarly. Nevertheless, we do detect some intriguing gender differences in these challenges. First, male players’ challenges are more likely to be provoked by those of their opponents. More importantly, at tiebreaks, females are more likely to reverse an umpire’s unfavorable call, while males make relatively more unsuccessful challenges. Furthermore, we find that men are a lot more likely to make “embarrassing” line-call challenges at tiebreaks and offenses (i.e., when the shot lands at the opponent’s side of the tennis court) than women. These significant gender differences suggest that women particularly diverge from men at crucial junctures of the match such as tiebreaks. Differences in factors such as risk aversion, overconfidence, pride, shame, and strategic signalling behavior might help us to explain these gender-difference findings in line call challenges.</P>

Equilibrium arsenic adsorption onto metallic oxides : Isotherm models, error analysis and removal mechanism

Esra Bilgin Simsek,Ulker Beker 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.11

Arsenic adsorption properties of mono- (Fe or Al) and binary (Fe-Al) metal oxides supported on natural ze-olite were investigated at three levels of temperature (298, 318 and 338 K). All data obtained from equilibrium experimentswere analyzed by Freundlich, Langmuir, Dubinin-Radushkevich, Sips, Toth and Redlich-Peterson isotherms, and errorfunctions were used to predict the best fitting model. The error analysis demonstrated that the As(V) adsorption pro-cesses were best described by the Dubinin-Raduskevich model with the lowest sum of normalized error values. Ac-cording to results, the presence of iron and aluminum oxides in the zeolite network improved the As(V) adsorptioncapacity of the raw zeolite (ZNa). The X-ray photoelectron spectroscopy (XPS) analyses of ZNa-Fe and ZNa-AlFesamples suggested that the redox reactions are the postulated mechanisms for the adsorption onto them while the ad-sorption process is followed by surface complexation reactions for ZNa-Al.

Tabu search based optimum design of geometrically non-linear steel space frames

Degertekin, S.O.,Hayalioglu, M.S.,Ulker, M. Techno-Press 2007 Structural Engineering and Mechanics, An Int'l Jou Vol.27 No.5

In this paper, two algorithms are presented for the optimum design of geometrically nonlinear steel space frames using tabu search. The first algorithm utilizes the features of short-term memory (tabu list) facility and aspiration criteria and the other has long-term memory (back-tracking) facility in addition to the aforementioned features. The design algorithms obtain minimum weight frames by selecting suitable sections from a standard set of steel sections such as American Institute of Steel Construction (AISC) wide-flange (W) shapes. Stress constraints of AISC Allowable stress design (ASD) specification, maximum drift (lateral displacement) and interstorey drift constraints were imposed on the frames. The algorithms were applied to the optimum design of three space frame structures. The designs obtained using the two algorithms were compared to each other. The comparisons showed that the second algorithm resulted in lighter frames.