Regular Black Hole Solutions of the Non-minimally Coupled Y(R)F2Y(R)F^2 Gravity

In this study we investigate regular black hole solutions of the non-minimally coupled $Y(R)F^2$ gravity model. We give two regular black hole solutions and the corresponding non-minimal model for both electrically or magnetically charged cases. We calculate all the energy conditions for these solutions.Comment: 11 pages, some typos are correcte

Holographic Superconductors with the General RF2RF^2 type Couplings

We explore the effects of the general non-minimally coupled $RF^2$-type couplings on the holographic s-wave superconductors numerically in the Schwarzschild-AdS background. We calculate the condensation and conductivity of the model for the coupling parameters $a_1$ and $\beta$. We obtain that the bigger deviations of the parameter $a_1$ from the minimal case lead to the larger deviations of the gap frequency from the universal value $\omega_g/T_c \approx 8$. Moreover the smaller $\beta$ and $a_1$ cause to gradually stronger and narrower coherence peak.Comment: 12 pages, 14 figure

Ioannis N. Grigoriadis, Instilling Religion in Greek and Turkish Nationalism: A”Sacred Synthesis”

Book Revie

Non-minimal RF2RF^2-type corrections to holographic superconductor

We study $(2+1)$-dimensional holographic superconductors in the presence of non-minimally coupled electromagnetic field to gravity by considering an arbitrary linear combination of $RF^2$-type invariants with three parameters. Our analytical analysis shows that the non-minimal couplings affect the condensate and the critical temperature.Comment: Accepted for publication in Modern Physics Letters

Determinants of Capital Structure in Financial Institutions: The Case of Turkey

This study analyzes the determinants of capital structure in the Turkish banking sector. We propose an empirical model in order to identify the factors that explain why banks hold capital beyond the amount required by the regulation. We used a panel data set that employs bank-level data from the Turkish banking sector covering the period 2002–2006 and estimated the model with generalized method of moments (GMM). The findings of this study suggest that lagged capital, portfolio risk, economic growth, average capital level of the sector and return on equity are positively correlated with capital adequacy ratio and share of deposits are negatively correlated with capital adequacy ratio.Capital Adequacy, Turkish Banking Sector, GMM

Is It How You Look or Speak That Matters? - An Experimental Study Exploring the Mechanisms of Ethnic Discrimination

Using a unique laboratory experiment where subjects are asked to guess the test performance of candidates presented by facial portraits and voice messages, this paper explores the following questions: Are beliefs about performance affected by if a candidate is perceived to have looks that are non-stereotypical for the dominant population and do these beliefs change if the candidate has native-like versus accented speech? The experiment is conducted in Sweden and the results show that candidates not perceived as stereotypically Swedish are considered to be worse performers. These beliefs are found in within-gender but not in cross-gender evaluations and are not eliminated when additional performance-related information about the candidates is provided. When candidates are presented by both looks and speech, differential evaluations based on looks disappear. Instead, we find strong negative beliefs about performance for candidates that speak Swedish with a foreign accent implying that ethnic stereotypes associated with speech override stereotypes associated with appearance. The negative beliefs associated with foreign-accented speech are not supported by corresponding mean differences in the candidates’ actual test performance.Experiment; Appearance; Speech; Beliefs; Performance; Stereotypes

Inflation of the Universe by the Non-minimal Y(R)F2Y(R)F^2 Models

The cosmological solutions of the non-minimal $Y (R)F^2$ theory which are compatible with FRW space-time are investigated. In order to avoid the isotropy violation of a vector field, it can be considered that the presence of a triplet of vector fields satisfying $SO(3)$ symmetry, or the average of randomly oriented electromagnetic fields over the sufficiently large volume. By considering the symmetry arguments, the inflation driven by the non-minimally coupled vector fields is studied. Then the cosmological solutions and corresponding models are obtained with the power law, hyperbolic and hybrid scale functions.Comment: 16 pages, accepted in MPL