Soft Power Antidote to Clash of Civilizations: The Case of Turkey-originated Volunteer Movement

( Erhan Atay ) 한국행정학회 2010 한국행정학회 학술발표논문집 Vol.2010 No.-

SOME NOTES ON EXTENSIONS OF BASIC UNIVALENCE CRITERIA

Erhan Deniz,Halit Orhan 대한수학회 2011 대한수학회지 Vol.48 No.1

The object of the present paper is to obtain a more general condition for univalence of analytic functions in the open unit disk U: The signicant relationships and relevance with other results are also given. A number of known univalent conditions would follow upon specializing the parameters involved in our main results.

GLOCAL SCHOOLS OF TURKEY:FROM RURAL AREAS TO GLOBAL STAGE

Erhan Atay 한국교육행정학회 2011 한국교육행정학회 학술연구발표회논문집 Vol.2011 No.2

Hospital Emergency Department Simulation for Resource Analysis

Erhan Kozan,Mel Diefenbach 대한산업공학회 2008 Industrial Engineeering & Management Systems Vol.7 No.2

The Emergency Department (ED) is an integral part of hospitals. Admissions from the ED account for a significant proportion for a hospital’s activity. Ensuring a timely and efficient flow of patients through the ED is crucial for optimising patient care. In recent years, ED overcrowding and its impact on patient flow has become a major issue facing the health sector. Simulation is rapidly becoming a tool of choice when examining hospital systems due to its capacity to involve numerous factors and interactions that impact the system. An analytical simulation model is used to investigate potential impacts by changing the following aspects of ED (physical layouts; number of beds; number and rate of patient arrivals; acuity of illness or injury of patients; access to radiology and pathology services; hospital staffing arrangements; and access to inpatient beds). Results of a significant numerical investigation at a hospital are also presented.

Comparison of four malignancy risk indices in the detection of malignant ovarian masses

Erhan Aktürk,Rıza Efendi Karaca,İbrahim Alanbay,Murat Dede,Emre Karaşahin,Müfit Cemal Yenen,İskender Başer 대한부인종양학회 2011 Journal of Gynecologic Oncology Vol.22 No.3

Objective: The aim of this study was to evaluate the ability of four risk of malignancy indices (RMI) to detect malignant ovarian tumors. Methods: This is a prospective study of 100 women admitted to the Department of Obstetrics and Gynecology of Gulhane Military Medicine Academy for surgical exploration of pelvic masses. To diagnose malignant ovarian tumors, the sensitivity, specificity, negative and positive predictive values and diagnostic accuracy of four RMIs (RMI 1, RMI 2, RMI 3, and RMI 4) were obtained. Results: In our study we found that there is no statistically significant difference in the performance of four different RMIs in discriminating malignancy. We think that malignancy risk indices is more reliable than the menopausal status, serum CA-125 levels, ultrasound features and tumor size separately in detecting malignancy. Conclusion: We concluded that any of the four malignancy risk indices described can be used for selection of cases for optimal therapy. These methods are simple techniques that can be used even in less-specialized gynecology clinics to facilitate the selection of cases for referral to an oncological unit. Objective: The aim of this study was to evaluate the ability of four risk of malignancy indices (RMI) to detect malignant ovarian tumors. Methods: This is a prospective study of 100 women admitted to the Department of Obstetrics and Gynecology of Gulhane Military Medicine Academy for surgical exploration of pelvic masses. To diagnose malignant ovarian tumors, the sensitivity, specificity, negative and positive predictive values and diagnostic accuracy of four RMIs (RMI 1, RMI 2, RMI 3, and RMI 4) were obtained. Results: In our study we found that there is no statistically significant difference in the performance of four different RMIs in discriminating malignancy. We think that malignancy risk indices is more reliable than the menopausal status, serum CA-125 levels, ultrasound features and tumor size separately in detecting malignancy. Conclusion: We concluded that any of the four malignancy risk indices described can be used for selection of cases for optimal therapy. These methods are simple techniques that can be used even in less-specialized gynecology clinics to facilitate the selection of cases for referral to an oncological unit.

Fluorescence Microscopy of Condensed DNA Conformations of Bacterial Cells

ErhanS?leymanoglu 한국미생물학회 2002 The journal of microbiology Vol.40 No.4

Cellular DNA in prokaryotes is organized in nucleic acid-protein self-assemblies referred to as the nucleoid. The physical forces responsible for its stability inside the poor solvent properties of the cytoplasm and their functional implications are not understood. Studies on the organisation and functioning of the cytosol of cells largely rely on experimental protocols performed in highly dilute solutions using biochemically purified molecules, which is not a reliable substitute for the situation existing in vivo. Our current research interest is focused on the characterization of biological and physical forces determining the compaction and phase separation of DNA in Escherichia coli cytoplasm. We have emphasized the effect of excluded volume in solutions with high macromolecular concentrations (macromolecular crowding) upon self-association patterns of reactions. The prokaryotic cytosol was simulated by addition of inert polymer polyethylene glycol (PEG) (average molecular weight 20000), as an agent which afterwards facilitates the self-association of macromolecules. Fluorescence microscopy was used for direct visualization of nucleoids in intact cells, after staining with DAPI (4',6-diamidino-2-phenylindole dihydrochloride). Addition of the crowding agent PEG 20,000, in increasing concentrations generated progressively enhanced nucleoid compaction, the effect being stronger in the presence of 0.2 M NaCl and 5 mM MgCl2. Under these conditions, the nucleoids were compacted to volumes of around 2 μm3 or comparable sizes with that of living cells.

The Crystal Field Effects in the Spin-1 ising Model with FM/AFM Interactions on a Two-layer Bethe Lattice

Erhan Albayrak,Seyma Akkaya 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.4

The exact recursion equations in a pair-wise approach are used to study the phase transitions on a two-layer Bethe lattice with crystal field (D) and external magnetic field (H) acting on the layers. The ferromagnetic (FM) and the antiferromagnetic (AFM) interactions for the spins of the upper and the lower layers, respectively, and either a FM- or an AFM-type interaction between the adjacent spins of the layers are assumed. The ground state (GS) phase diagrams of the model are calculated on the (J2/J1, J3/qJ1) planes for given system parameters, and thirteen distinct GS configurations are obtained. With the GS phase diagrams, the temperature-dependent phase diagrams of the model are obtained by studying the thermal behaviors of the order parameters and the response functions. The model was found to exhibit first- and second-order phase transitions for the coordination numbers q = 3, 4, and 6; hence, tricritical points are also observed. A reentrant behavior is also found whenever the model displays two N´eel temperatures. The exact recursion equations in a pair-wise approach are used to study the phase transitions on a two-layer Bethe lattice with crystal field (D) and external magnetic field (H) acting on the layers. The ferromagnetic (FM) and the antiferromagnetic (AFM) interactions for the spins of the upper and the lower layers, respectively, and either a FM- or an AFM-type interaction between the adjacent spins of the layers are assumed. The ground state (GS) phase diagrams of the model are calculated on the (J2/J1, J3/qJ1) planes for given system parameters, and thirteen distinct GS configurations are obtained. With the GS phase diagrams, the temperature-dependent phase diagrams of the model are obtained by studying the thermal behaviors of the order parameters and the response functions. The model was found to exhibit first- and second-order phase transitions for the coordination numbers q = 3, 4, and 6; hence, tricritical points are also observed. A reentrant behavior is also found whenever the model displays two N´eel temperatures.

BI-ROTATIONAL HYPERSURFACE SATISFYING ∆IIIx =AxIN 4-SPAC

Erhan Guler,Yusuf Yaylı,,Hasan Hilmi Hacısalihoglu 호남수학회 2022 호남수학학술지 Vol.44 No.2

We examine the bi-rotational hypersurface x = x(u, v, w) with the third Laplace-Beltrami operator in the four dimensional Euclidean space E 4. Giving the i-th curvatures of the hypersurface x, we obtain the third Laplace-Beltrami operator of the bi-rotational hypersurface satisfying ∆IIIx =Ax for some 4 × 4 matrix A.

THE HARDY SPACE OF RAMANUJAN-TYPE ENTIRE FUNCTIONS

Erhan Deniz,Murat Çağlar 호남수학회 2023 호남수학학술지 Vol.45 No.1

In this paper, we deal with some geometric properties including starlikeness and convexity of order β of Ramanujan-type entire functions which are natural extensions of classical Ramanujan entire functions. In addition, we determine some conditions on the parameters such that the Ramanujan-type entire functions belong to the Hardy space and to the class of bounded analytic functions.

Investigating the relation between secondary school students` achievement in forming and solving equations

Erhan Ertekin,Ersen Yazici,Ali Delice 한국수학교육학회 2009 수학교육연구 Vol.13 No.2