Kırşehir Ahi Evran Üniversitesi Kurumsal Akademik Arşivi
DSpace@Kırşehir, Kırşehir Ahi Evran Üniversitesi tarafından doğrudan ve dolaylı olarak yayınlanan; kitap, makale, tez, bildiri, rapor, araştırma verisi gibi tüm akademik kaynakları uluslararası standartlarda dijital ortamda depolar, Üniversitenin akademik performansını izlemeye aracılık eder, kaynakları uzun süreli saklar ve yayınların etkisimi artırmak için telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
On Influence of Fluid Viscosity on Interface Pressure in Hydro-Piezoelectric System Under Its Forced Vibration
(Springer, 2025) Akbarov, S.D.; Ekicioğlu, Küzeci Zeynep
The primary focus of this paper is to examine the effect of fluid viscosity on vibration that occurs when harmonic mechanical force is applied to a system consisting of a piezoelectric plate, a compressible viscous fluid, and a rigid wall. The exact equations of motion of the linear electro-elasticity theory for the piezoelectric materials are used to describe the plate motion. The plane-strain state of the plate is considered. The linearized Navier-Stokes equations for a compressible (barotropic) viscous fluid are used to describe the fluid flow, and the plane flow is taken into consideration. Equations corresponding to the problem are solved by applying the Fourier transform with respect to the space coordinate, which is on the coordinate axis directed along the plate-lying direction. The Fourier transforms are determined analytically, but the inverse transforms are computed numerically. Numerical results on the interface pressure are obtained for the PMN-PT and PZT-2 materials, and the results are discussed. According to these results, it is established that the fluid viscosity causes the increase in the amplitude of the interface normal stress and can also significantly affect the vibration phase at which the studied stress has its absolute minimum value. Furthermore, the electromechanical coupling effects of the plate material on the studied parameters are determined.
Unveiling Turkish Students’ Global Competence: A Psychometric Network Analysis of PISA 2018 Data
(Routledge, 2025) Kuş, Zafer; Demirkol, Sinem; Elvan, Özlem
This study aims to examine the interactions between ten scales representing different aspects of the global competence model among students in Turkey, based on PISA 2018 data. The study analyses data from 6,731 students in Turkey who participated in the global competence survey using the psychometric network approach, which is often used to explore relationships between psycho-behavioral structures. The results show that students’ global competence in Turkey involves complex and multidimensional relationships. A strong relationship was found between students’ awareness of global issues and their ability to discuss complex global issues, as well as between their interest in learning about other cultures and their respect for people from different cultural backgrounds.
Do Patents on Environmental Technologies Truly Facilitate the Green Transition in Japan? A Pathway to the 2050 Net-Zero Emission Target
(John Wiley and Sons Ltd, 2025) Sofuoğlu, Emrah
In the context of the Paris Agreement, many governments have been tackling climate change and trying to achieve net-zero emission targets by 2050, since these targets are vital to limiting global warming to 2°C for a sustainable planet. This study explores the linkage between environmental sustainability and environmental patents in Japan. For this purpose, the study covers 1975–2021 and employs novel econometric approaches such as the Fourier unit root, Fourier ARDL cointegration, and Fourier-based long-term coefficient techniques. As a result of the empirical findings, we first capture a long-run cointegration relationship between environmental sustainability, environmental patents, economic growth, and energy consumption. We unexpectedly discovered empirical evidence that contradicts the existing literature. According to the Fourier-based long-term coefficient results, environmental patents, economic growth, and energy consumption adversely affect environmental quality. Therefore, we have three main interpretations of the findings. (i) Contrary to expectations, patents on environmental technologies adversely impact environmental sustainability. (ii) Japan has not yet achieved a decoupling between economic growth and CO2 emissions. (iii) The negative impact of environmental patents on environmental sustainability reveals that environmental patents have yet to have any influential power in achieving net-zero emission targets. In addition, environmental patent strategies do not help emission reduction in Japan. Therefore, if policymakers emphasize long-term environmental patent policies, they might establish an additional strategy to achieve net-zero targets, which is crucial for mitigating possible emission gaps. These findings suggest that Japanese policymakers should support effective environmental patents to achieve the net-zero emission target by 2050.
The Bioarchaeological Analysis of a New Early Bronze Age Settlement in Central Anatolia: Harhar Deresi (3000-2700 BC)
(Universidad de la Frontera, 2025) Erkman, Ahmet Cem; Şener, Elçin; Taş, Ali; Özbey, Serpil Özdemir; Shirvan, Samad Joshani
Konya Province, one of the most significant Bronze Age settlements in Anatolia, is notable for its unique mounds. Harhar Deresi, located in one of the distinctive plateaus of Central Anatolia, is a pastoral settlement that was overlooked during surface surveys conducted by many researchers due to the region's topographic features. This settlement was first discovered by chance in 2018 during the construction of the Ankara-Nigde Highway and its connecting roads, and a rescue excavation was carried out in part of the site. This study presents paleopathological findings that contribute to an understanding of daily life in a recently discovered settlement from the Early Bronze II period (3000-2700 BC). The research is guided by two primary objectives. Firstly, it seeks to provide a qualitative paleopathological assessment of diseases, informed by observations related to osteoarthritis, trauma, osteoid osteoma, enthesopathy, and supracondylar process syndrome. Efforts have been made to ensure that this study is quantitative by comparing the pathology rates with those of contemporary ancient Anatolian societies. Secondly, the study aimed to understand the general nutrition, health, and socio-economic structure of this society, as revealed by dental anthropological findings. Our research indicates that the population engaged in intensive agricultural activities and followed a low-protein diet, likely due to the demands of strenuous physical labor. Furthermore, this study endeavors to introduce the physiological stress and health conditions experienced by the newly discovered Early Bronze Age population, serendipitously located in the Central Anatolia region, into the academic literature through a bioarchaeological perspective.
Optical, Non-Linear Optical and Electronic Properties of 1,3,4-Oxadiazole Derivative: A Combined Experimental and Theoretical Study
(Springer, 2025) Şaş, Emine Babur
We investigated the electronic and optical properties of an organic material, 2-(4-bromophenyl)-5-phenyl-1,3,4-oxadiazole (BP-OXA), combining experimental measurements and theoretical calculations. FT-IR and FT-Raman spectra were recorded in the solid phase. The NMR chemical shifts (1H and 13C) were recorded in chloroform solution. The 1H and 13C NMR spectra were computed by using the gauge-invariant atomic orbital (GIAO) method, showing good agreement with the experimental ones. PL studies were utilized to investigate the light-emitting properties of BP-OXA. UV–Vis spectra were recorded in dichloromethane (DCM) at different concentrations, showing strong absorption peaks in the near-UV region (200–400 nm). In the study, we calculated the HOMO–LUMO energy gaps, UV spectra, and optical parameters of the molecule using B3LYP and CAM-B3LYP functional methods and evaluated their compatibility with experimental data. The experimental optical band gap (Eg) of the molecule of approximately 3.84 eV indicates that it has semiconductor properties. Additionally, refractive index values (1.70–2.58) and optical conductivity parameters indicate that BP-OXA is well-suited for optoelectronic applications. The material exhibits robust optical behavior, supported by high dipole moments and significant hyperpolarizability values (5503.52 × 10⁻33 esu), suggesting potential for advanced photonic technologies. These results highlight BP-OXA as a promising candidate for applications in optoelectronic devices and nonlinear optics.
