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Selim Kurt,Göktürk Tüysüzoğlu 한양대학교 아태지역연구센터 2022 Journal of Eurasian Studies Vol.13 No.2
One of the most critical disputes in the Post-Soviet space is the long-lasting Nagorno-Karabakh conflict between Azerbaijan and Armenia. While this issue has long been regarded as a land-based dispute to a large extent, it can also be stated from the securitization perspective that it is a conflict inherent in ethnic identity. The proposed way to solve a problem in the securitization approach is the desecuritization of the issue. However, negotiations conducted by the Minsk Group on the Nagorno-Karabakh conflict, which were initiated within the framework of the OSCE, did not yield any results. In this context, the process of resolving the issue through negotiations, in other words, desecuritization, failed. This has led to the re-securitization of the problem and paved the way for taking extraordinary measures to come to a solution. The final military confrontation experienced in 2020 has also been triggered specifically by this approach.
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Arikan Nihat,Ocak Hamza Yaşar,Dikici Yıldız Gökçen,Yıldız Yasin Göktürk,Ünal Rahmi 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.76 No.10
In the present study, the second-order elastic constants and the electronic band structures of the X2ScAl (x = Ir, Os, and Pt) compounds crystallized in the L21 phase were calculated separately by using the ab-initio density functional theory. According to the results for the second-order elastic constants, these compounds met the Born mechanical stability criteria. Also, according to the Pugh criteria, they were found to have a ductile structure and to show anisotropic behavior. The microhardneses of the compounds were between 2 and 14 GPa, and the highest hardness was found in the Ir2ScAl (14.290 GPa) compound. In addition, the energy band structures of these compounds were calculated, and the crystals were found to have a metallic bond structure. All the computed data were compared with previously calculated results obtained with different methods. According to the findings obtained in the present study, in terms of its mechanical and electronic behaviors, Ir2ScAl was found to have better physical properties than Os2ScAl and Pt2ScAl. The phonon dispersion curves and their corresponding total and projected densities of states were investigated for the first time by using a linear-response approach in the context of density functional perturbation theory. The frequencies of the optical phonon modes of all compounds at the Γ point were 4.767, 7.504 and 9.271 THz for Ir2ScAl, 2.761, 7.985 and 9.184 THz for Os2ScAl and 2.012, 5.6952 and 8.118 THz for Pt2ScAl. The heat capacity Cv at constant volume versus temperature was calculated using a quasi-harmonic approach and the results are discussed.
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