Browsing by Subject "Gas"
Now showing 1 - 6 of 6
Results Per Page
Sort Options
Item Open Access An analysis of the development and the importance of oil and gas resources in Russia and their relationship to the Russian economic growth and foreign policy(Bilkent University, 2008) Kara, GöktuğThis dissertation analyzes the development of the oil and gas sector in Russia with a view to understand the role of these assets on the formation of Russian state interests and consequent policy prioritization, both at the domestic and the international level. The study identifies economic and political issues on which the influence of the oil and gas resources has been significant. The dissertation elucidates the various links between Russian economic development and revenues from the oil and gas sector, and well as explicit and implicit connections between Russian foreign policy and the oil and gas sector. In the changing world order, strategic manipulation, communication, persuasion and economic incentives became as important as military might or an outright threat in order to shape the outcome of international issues. Following the collapse of the Soviet Union, oil and gas diplomacy, pipeline politics, subsidised energy deliveries, threats to cut-off energy deliveries coloured Russian attempts to revitalize influence throughout the territory of the former Soviet iv Union. Russia today is wedged between net consumers of energy which are competing to secure best terms for their oil and gas deliveries. As the Russian military capabilities fell after 1991, the policy around these vital resources has become the primary drivers of Russian domestic and foreign agenda. Another aim of this analysis is to contribute to the study of international relations by emphasizing its analysis of a state’s domestic agenda’s effect on the international arena. Domestic factors have a crucial relevance to relationships shared by actors at the international level. This dissertation will use Russia’s development of the oil and gas sector as a case for evaluating and understanding the relationship between domestic and international issues.Item Open Access The challenges facing Eastern Mediterranean gas and how international law can help overcome them(Taylor and Francis, 2021) Stanič, A.; Karbuz, SohbetEnormous natural gas reserves in the Eastern Mediterranean have attracted the attention of the international energy majors. The region, however, remains one of the most under-explored and -exploited regions in the world. Numerous technical, commercial, legal and political challenges need to be overcome for these resources to be exploited and exported. This article examines the key commercial and legal challenges the region faces, and proposes possible ways to overcome these challenges by discussing the international law on the delimitation of maritime boundaries and the customary international law obligations of states in the region to resolve delimitation disputes peacefully, to make every effort to enter into provisional arrangements of a practical nature pending agreement on final delimitation and to refrain from unilaterally exploiting natural resources in disputed maritime zonesItem Open Access Dielectric screening effects on electron transport in Ga0.51In0.49P/InxGa1-xAs/GaAs quantum wells(American Institute of Physics, 2000-04-18) Besikci, C.; Bakir, A. T.; Tanatar, BilalThe effects of dielectric screening on the two dimensional polar optical phonon scattering and on electron transport in Ga0.51In0.49P/InxGa1-xAs/GaAs (x=0, 0.15, and 0.25) modulation doped heterostructures and high electron mobility transistors are investigated through the ensemble Monte Carlo technique. The two dimensional polar optical phonon scattering rates including and excluding dielectric screening effects are calculated using the self-consistently evaluated electronic states in the quantum well. The calculated scattering rates are compared in order to see the effects of screening on the inter- and intra-subband scattering. Screening significantly lowers the intra-subband polar optical phonon scattering rates in both lattice matched and pseudomorphic structures. This results in a considerable lowering of the critical electric field beyond which negative differential resistance is seen. Screening also modifies the dependence of transport properties on the quantum well parameters. The results of the ensemble Monte Carlo simulations of high electron mobility transistors show that the performance of the device is considerably underestimated, if screening is not included in the calculation of the polar optical phonon scattering rates. (C) 2000 American Institute of Physics.Item Open Access Dynamic correlation effects on the plasmon dispersion in a two-dimensional electron gas(The American Physical Society, 2003) Yurtsever, A.; Moldoveanu, V.; Tanatar, BilalThe charge-density oscillations (plasmons) of a low-density two-dimensional uniform electron gas are studied within the framework of finite temperature and frequency dependent (dynamic) version of Singwi, Tosi, Land, and Sjölander theory and compared with the recent experimental results. The use of the Hartree-Fock approximation for the static structure factor leads to a finite temperature dynamical counterpart of the static Hubbard approximation. We observe important differences between dynamic and static local-field factors as well as between the corresponding plasmon dispersion laws. Our calculated plasmon energies that include dynamic correlations are in very-good agreement with the recent experimental results.Item Open Access Spin magnetization of a strongly correlated electron gas confined in a two-dimensional finite lattice(American Physical Society, 2004) Niţǎ, M.; Dinu, V.; Aldea, A.; Tanatar, BilalThe influence of disorder and interaction effects on the ground state polarization of the two-dimensional correlated electron gas is studied by numerical investigations of the unrestricted Hartree-Fock approach. With the model of Anderson disorder a continuous increase of the spin magnetization until the fully polarized regime is obtained. The ferromagnetic ground state is found to be favorable when the electron number is lowered and the interaction and disorder parameters are suitably chosen.Item Open Access Temperature dependence of the energy of a vortex in a two-dimensional Bose gas(Elsevier, 2004) Rajagopal, K. K.; Tanatar, Bilal; Vignolo, P.; Tosi, M. P.We evaluate the thermodynamic critical angular velocity Ωc(T) for creation of a vortex of lowest quantized angular momentum in a strictly two-dimensional Bose gas at temperature T, using a mean-field two-fluid model for the condensate and the thermal cloud. Our results show that (i) a Thomas-Fermi description of the condensate badly fails in predicting the particle density profiles and the energy of the vortex as functions of T; and (ii) an extrapolation of a simple Thomas-Fermi formula for Ωc(0) is nevertheless approximately useful up to T≃0.5Tc.