Yazar "Tarı, Özlem" için listeleme
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Phase transitions in molecular crystals as an example of coupled systems studies
Yurtseven, H.; Tarı, Özlem (AMER SCIENTIFIC PUBLISHERS, 2014)Molecular crystals exhibit phase transitions under various temperature, pressure and concentration conditions. Thermodynamic quantities such as the specific heat, thermal expansion and isothermal compressibility show ... -
Pippard relation close to the alpha - beta transition for quartz in granite
Yurtseven, Hamit; Tarı, Özlem; Gümüş, Ayşegül (American Institute of Physics, 2016)In this study, we examine variation of the thermal expansion ?p with the isothermal compressibility KT at various temperatures (1 atm) close to the ?-ß transition in quartz using the experimental data from the literature. ... -
Pippard relations for cubic gauche nitrogen
Yurtseven, Hamit; Tiryaki, Özgecan; Tarı, Özlem (2016)The Pippard relations (CP vs. ?P and ?P vs. ?T) are examined at various temperatures up to 1200 K at zero pressure (P = 0) for the cubic gauche nitrogen. The specific heat (CP) is related to the thermal expansion (?P) and ... -
Pressure dependence of the heat capacity near the melting point in benzene
Yurtseven, Hamit; Tarı, Özlem (Elsevier Science, 2017)The heat capacity C-p is calculated as a function of pressure at constant temperatures of 25, 40 and 51 degrees C for the solid and liquid phases of benzene near the melting point. For this calculation, the observed molar ... -
Pressure effect on the cholesteric – smectic A transition in cholestryl myristate
Yurtseven, Hamit; Yolal, B.; Tarı, Özlem (Taylor & Francis, 2016)Cholesteryl myristate exhibits tricritical behavior under high pressures close to its cholesteric-smectic A (Ch/SA) transition, as observed experimentally. We study here the thermodynamic properties of this liquid crystal ... -
Raman frequencies calculated at various pressures in phase I of benzene
Tarı, Özlem; Yurtseven, Hamit (KCS Publications, 2013)We calculate in this study the pressure dependence of the frequencies for the Raman modes of A (Ag), B (Ag, B2g) and C (B1g, B3g) at constant temperatures of 274 and 294K (room temperature) for the solid phase I of benzene. ... -
Surrogate Based Design Optimization of Multi-Band Antenna
Tarı, Özlem; Aysu, Belen; Mahouti, Peyman; Belen, Mehmet Ali (Institute of Electrical and Electronics Engineers Inc., 2021)In this work, design optimization process of a multiband antenna via the use of Artificial Neural Network (ANN) based surrogate model and meta-heuristic optimizers is studied. For this mean firstly, by using Latin-Hyper ... -
Surrogate-Based Design Optimization of Multi-Band Antenna
Belen, Aysu; Tarı, Özlem; Mahouti, Peyman; Belen, Mehmet A.; Caliskan, Alper (Applied Computational Electromagnetics Society (ACES), 2022)In this work, design optimization process of a multi-band antenna via the use of artificial neural network (ANN) based surrogate model and meta-heuristic optimizers are studied. For this mean, first, by using Latin-Hyper ... -
Temperature dependence of magnetic and thermal properties of chiral HyFe and HyMn close to phase transitions by using the Landau mean field model
Tarı, Özlem; Yurtseven, Hamit (Elsevier Science, 2019)Magnetic and thermal properties of chiral metal formate frameworks (MOFs) of NH2NH3M(HCOO)(3), M = Fe, Mn, namely, HyFe and HyMn are investigated close to phase transitions by using Landau phenomenological model. By expanding ... -
Temperature effect on the structural ferroelectric – paraelectric transition in Li2Ge7O15
Yurtseven, Hamit; Tarı, Özlem (Taylor & Francis, 2016)Li2Ge7O15 (LGO) undergoes the ferroelectric – paraelectric transition at Tc D283.5K. The crystal structure of LGO is orthorhombic with the four formula units in the unit cell in the paraelectric phase (T < TC) . The ... -
Thermodynamic study on the magnetic transition and structural phase transition in [(CH3)(2)NH2][Na0.5Fe0.5(HCOO)(3)] by using the Landau phenomenological model
Yurtseven, H.; Tarı, Özlem (Amer Inst. Physics, 2020)In this study, we apply the Landau phenomenological model to describe magnetic transition and structural phase transition in a metal formate framework (MOF) of the ferromagnetic [(CH3)(2)NH2][Na0:5Fe0:5(HCOO)(3)], namely, ... -
Variation of the molar volume with the temperature and the Pippard relations near the melting point in benzene
Tarı, Özlem; Yurtseven, Hamit (Elsevier, 2016)In this study, we calculate variation of the molar volume with the temperature at constant pressures (70.5, 85.2, 128 and 175.2 MPa) using the experimental data from the literature for the solid and liquid phases of benzene ... -
Variation of the raman frequency of a soft mode with the pressure (20 oc) for the phase transitions in NH4F
The Raman frequency of a soft mode (238 cm-1) is analyzed as a function of pressure at 20 oC for NH4F using the experimental data from the literature. This analysis is performed for the pressure dependence of the Raman ...