gövdeli t
159251807
External Debt and Economic Growth in Turkey: An Empirical Analysis
This study analyzes the impact of external debt stock, openness and the consumer price index on economic growth, based on time series data obtained from the World Bank for the period from 1970 to 2016. For this report's purpose, the stability of the series was analyzed. Having identified the series to have first degree l(1) stability, the ARDL bounds testing approach was applied and a relationship of cointegration was established. In light of these findings, it has been observed that external debt has a positive impact on economic growth, while openness and consumer price index have a negative impact. Therefore, this study recommends keeping openness and the consumer price index under control to increase economic growth with the help of external debt.
Sosyoekonomi
Tuncer Govdeli
188186646
HEALTH EXPENDITURE, ECONOMIC GROWTH, AND CO2 EMISSONS: EVIDENCE FROM THE OECD COUNTRIES
Bu calismada secilmis 26 OECD ulkesinin 1992 ile 2014 donemi arasinda saglik harcamalari, ekonomik buyume ve CO 2 emisyonu arasindaki iliskiler arastirilmistir. Bu amacla kullanilacak panel yontemlerini secebilmek icin degiskenlerin ve panelin yatay kesit bagimliligi belirlenmistir. Degiskenlerde ve panelde yatay kesit bagimliligi olmasi sebebiyle kullanilan panel birim kok ve esbutunlesme testinin ikinci nesil testlerden secilmistir. Degiskenlerin I(1) mertebede duraganliklari tespit edilmistir. Ayrica modelde esbutunlesme iliskisi tespit edilmistir. Esbutunlesme katsayilarinin tahmin sonuclarina gore ekonomik buyume ve CO 2 emisyonunun esneklik katsayilari sirasiyla 0.188 ve 0.012 olarak tahmin edilmistir. VECM Granger nedensellik analizi sonuclarina gore ekonomik buyume saglik harcamalarinin nedenseli, CO 2 emisyonu saglik harcamalarinin nedenseli, ekonomik buyume CO 2 emisyonunun nedenselidir. Uzun donem nedensellik analizine gore ise ekonomik buyume ve CO 2 emisyonundan saglik harcamalarina dogru nedensellik iliskisi tespit edilmistir.
Tuncer Govdeli
214152945
Saglik Harcamalari, Ekonomik Buyume ve CO2 Emisyonu: OECD Ulkelerinden Kanitlar
Bu calismada secilmis 26 OECD ulkesinin 1992 ile 2014 donemi arasinda saglik harcamalari, ekonomik buyume ve CO 2 emisyonu arasindaki iliskiler arastirilmistir. Bu amacla kullanilacak panel yontemlerini secebilmek icin degiskenlerin ve panelin yatay kesit bagimliligi belirlenmistir. Degiskenlerde ve panelde yatay kesit bagimliligi olmasi sebebiyle kullanilan panel birim kok ve esbutunlesme testinin ikinci nesil testlerden secilmistir. Degiskenlerin I(1) mertebede duraganliklari tespit edilmistir. Ayrica modelde esbutunlesme iliskisi tespit edilmistir. Esbutunlesme katsayilarinin tahmin sonuclarina gore ekonomik buyume ve CO 2 emisyonunun esneklik katsayilari sirasiyla 0.188 ve 0.012 olarak tahmin edilmistir. VECM Granger nedensellik analizi sonuclarina gore ekonomik buyume saglik harcamalarinin nedenseli, CO 2 emisyonu saglik harcamalarinin nedenseli, ekonomik buyume CO 2 emisyonunun nedenselidir. Uzun donem nedensellik analizine gore ise ekonomik buyume ve CO 2 emisyonundan saglik harcamalarina dogru nedensellik iliskisi tespit edilmistir.
Adiyaman Universitesi Sosyal Bilimler Enstitusu Dergisi
Tuncer Govdeli
158358933
EKONOMIK OZGURLUK, TURIZM VE EKONOMIK BUYUME: BRICST ULKELERINDE KONYA BOOTSTRAP NEDENSELLIK ANALIZI
Bu calismada BRICST (Brezilya, Rusya, Hindistan, Cin, Guney Afrika ve Turkiye) ulkelerinin 1995 ile 2016 doneminin ekonomik ozgurluk, turizm gelirleri ve ekonomik buyume iliskisi analiz edilmistir. Bu amacla oncelikle panelin yatay kesit bagimliligi arastirilmistir. Panelde yatay kesit bagimliligi belirlendikten sonra panelin egim katsayilarinin heterojen oldugu belirlenmistir. Panelin yatay kesit bagimliligi altinda egim katsayilarinin heterojen olmasi, Konya (2006) nedensellik testinin on kosulunu saglamistir. Konya (2006) nedensellik testi analizleri gore; i) Hindistan ve Guney Afrika ulkelerinde ekonomik buyume ekonomik ozgurlugun nedenselidir. ii) Cin, Guney Afrika ve Turkiye'de turizm gelirleri ekonomik buyumenin nedenselidir ve Rusya'da ekonomik buyume ile turizm gelirleri arasinda cift yonlu nedensellik tespit edilmistir. iii) Hindistan'da ekonomik ozgurluk ile turizm gelirleri arasinda cift yonlu nedensellik iliskisi vardir ve Guney Afrika'da turizm gelirleri ekonomik ozgurlugun nedenselidir. iv) Rusya'da ekonomik ozgurluk ve turizm gelirleri ile ekonomik buyume arasinda nedensellik iliskisi tespit edilmistir.
Tuncer Govdeli
139521366
Evaluation of the influence of build and print orientations of unmanned aerial vehicle parts fabricated using fused deposition modeling process
Abstract The principal objective of this study is to provide an insight into the simulation of fused deposition modeling (FDM) parts considering the influence of build and print orientations. The elastic modulus, strength and Poisson's ratio at different build and print orientations are obtained by performing uniaxial tensile tests. Based on the results, an appropriate material model is formed and validated by conducting flexural tests on a flat and curved layer FDM (CLFDM) parts fabricated in various print and build orientations. It is found that the influence of the print orientation or different raster angle is minimal and an averaged isotropic material model can be used to simulate parts in a particular build orientation. The build orientation influences the elastic mechanical response of the flat and CLFDM parts largely. A case study on a flying wing unmanned aerial vehicle (FW UAV) is presented to analyze the contribution of the build orientation on the strength of the structure. The case study shows that the effect of build orientation in some instances might not be critical and a thorough understanding of the loads interacting with the part is necessary before analyzing the building parameters.
Suraj Ravindrababu Yunus Govdeli Zhuo Wei Wong Erdal Kayacan
158802166
Petrol Tuketimi ve Buyume: OECD Ulkelerine Iliskin Panel Veri Analizi
Calismada petrol tuketimi ile ekonomik buyume arasindaki iliski 1980 ile 2013 yillarini kapsayacak sekilde 28 OECD ulke icin analiz edilmistir. Oncelikle ulkeler arasinda yatay kesit bagimliligi incelenmistir. Elde edilen bulgularda yatay kesit bagimliligi olmasindan dolayi birim kok testi ve esbutunlesme testlerinin ikinci nesil test olmasi gerekmektedir. Bu nedenle ikinci nesil birim kok testiyle (Pesaran CADF (2007) esbutunlesme testi (Westerlund Durbin H (2008) kullanilmistir. Ortaya cikan sonuclarda petrol tuketimi ile ekonomik buyume arasinda esbutunlesme iliskisi bulunmustur. Calismanin son asamasinda ise uzun donem esbutunlesme katsayilarinin tahmini Common Correlated Effect (CCE) yardimiyla tahmin edilmistir. Elde edilen sonuclarda, esneklik katsayisi 0.279 olarak bulunmustur, boylece petrol tuketimi ekonomik buyumeyi olumlu yonde etkilemektedir.
Tuncer Govdeli Tuba Baskonus Direkci
158232172
The Relationship between Tourism and Economic Growth: OECD Countries
In the present study, the long term relationship between tourism revenues and economic growth between the years 1997 and 2012 was analyzed for 34 OECD countries using panel cointegration tests. Pedroni and Kao cointegration tests were used for this purpose. Based on the results of the panel cointegration analyses, it was found that the increase of tourism revenues had a positive effect on economic growth in the long term.
Tuncer Govdeli Tuba Baskonus Direkci
54993886
The Relationship Between Renewable Energy Consumption and Economic Growth in Non OECD Countries
Son yillarda toplam enerji tuketimindeki payi artan yenilenebilir enerji, ulkelerin politikalarini bu yone kaydirmasina sebep olmustur. 2050 ile 2060 yillari arasinda tukenmeye yaklasmasi beklenen yenilenemeyen enerji kaynaklarina alternatif arayislari her gecen gun artmaktadir. Ozellikle enerji savaslarinin ciddi yikimlara yol actigi gunumuzde alternatif enerji kaynaklari, gelecegimiz icin son derece onem arz etmektedir. Ulkeler, yenilenebilir enerji kaynaklari ile hem temiz hem daha ekonomik enerji uretebileceklerdir. Bu calismada, OECD disi 49 ulkenin yenilenebilir enerji tuketimi ile ekonomik buyume arasindaki iliski 1980 ile 2012 donemi icin analiz edilmistir. Bu amacla, ilk once ulkeler arasinda yatay kesit bagimliligi test edilmistir. Ulkeler arasinda yatay kesit bagimliligi olmasindan doyali ikinci nesil birim kok testi (Pesaran CADF(2007) ve esbutunlesme testi (Westerlund Durbin H (2008) kullanilmistir. Yapilan analizler sonucu, yenilenebilir enerji tuketimi ile ekonomik buyume arasinda uzun donemli iliski oldugu ortaya cikmistir. Calismanin son asamasinda ise uzun donem esbutunlesme katsayilarinin tahmini Common Correlated Effect (CCE) yardimiyla tespit edilmistir. Elde edilen bulgular, beklentilerimiz ve literatur ile uyumlu olup, yenilenebilir enerji tuketimindeki artis buyume ve kalkinmayi olumlu etkilemektedir.
Tuba Baskonus Direkci Tuncer Govdeli
104232639
Zero average index design via perturbation of hexagonal photonic crystal lattice
Abstract We study the effect of one dimensional lattice compression on photonic band diagram and apply it to form a superlattice in order to obtain zero n gap. Modulated hexagonal lattice has the ability to provide both positive and negative effective refractive indices. We analyze the dispersion characteristics in case the positions of holes in the lattice are varied in the orthogonal direction of applied light direction. We then compare modified structures with the conventional lattice and study the influence of the disorder on both photonic band structure and effective refractive index through numerical simulations. Proposed modulated photonic crystal introduces new ways of controlling light for on chip applications. We show the benefit of this class of suggested devices in one particular structure, a zero n gap superlattice, for the sake of comparison with the recently reported structures. However, other important implementations such as self collimation, which may play a major role in photonic integrated circuits, can also benefit from these designs.
Shahram Moradi Alperen Govdeli Serdar Kocaman
114555311
Additive Manufacturing of Unmanned Aerial Vehicles: Current Status, Recent Advances, and Future Perspectives
Yunus Govdeli Zhuo Wei Wong Erdal Kayacan