Istanbul, Turkey
Istanbul, Turkey

Fatih University is a private university with branches in Büyükçekmece, and, Anatolian Side, Istanbul, Turkey. In Turkey, there is no private university in the actual sense yet: All universities are subject to regulations of the Higher Education Council and all get their students via Student Selection and Placement Center , a governmental institution that holds countrywide compulsory exam for entrance to universities. It employs professors from over 30 countries focusing on academic diversity. Fatih University has the highest number of international students among Turkish universities, which makes it the most colorful Turkish university. Tuition fee is lower for international students than for native students. The number of students getting education at the university is around 14 thousand.English is the medium of instruction in most departments, and students are encouraged to learn an additional foreign language. There are also separate/parallel departments that teach students in Turkish, native language.The university was established in 1996 by the Turkish Association of Health and Medical Treatment. The ninth President Suleyman Demirel was present at the formal inauguration of the University in November 1996.The rector of Fatih University is Prof. Dr. Şerif Ali Tekalan. Mustafa Özcan is the Chairman of the Board of Trustees of Fatih University. With regard to its social inclination, it has connections with the Islamic Gülen movement of the Turkish cleric Fethullah Gülen. Wikipedia.

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Sevimoglu O.,Fatih University | Tansel B.,Florida International University
Waste Management | Year: 2013

Performances of gas engines operated with landfill gas (LFG) are affected by the impurities in the LFG, reducing the economic viability of energy recovery. The purpose of this study was to characterize the trace compounds in the LFG at the Odayeri Landfill, Istanbul, Turkey which is used for energy recovery. Composite gas samples were collected and analyzed for trace compounds (hydrocarbons, siloxanes, and volatile halogenated hydrocarbons) over a 3-year period. Trace compounds entering the gas engines, their impact on the engine performance were evaluated. The operational problems included deposit formation in the combustion chamber, turbocharger, and intercooler of engine before the scheduled maintenance times. High levels of hydrogen sulfide, as well as chlorinated and fluorinated compounds cause corrosion of the engine parts and decrease life of the engine oils. Persistence of siloxanes results in deposit formation, increasing engine maintenance costs. Pretreatment of LFG is necessary to protect the engines at the waste-to-energy facilities with persistence levels of siloxanes and volatile halogenated hydrocarbons. © 2012 Elsevier Ltd.

Senel M.,Fatih University
Synthetic Metals | Year: 2011

Glucose oxidase (GOx) was covalently immobilized onto an electrochemically prepared novel copolymer of ferrocene branched polypyrrole for the construction of an amperometric glucose biosensor. Ferrocene-pyrrole monomers were prepared by condensation reaction between ferrocene ethanol and 3-(1H-pyrrol-1-yl) propanoic acid and ferrocene-pyrrole, 3-(1H-pyrrol-1-yl)propanoic acid, and pyrrole monomers were electrochemically polymerized on the surface of the electrode. GOx was covalently immobilized onto the co-polymer coated electrode surface by using coupling agents to create amine bonds. The prepared copolymers were utilized as conducting films for amperometric glucose sensing after immobilization of GOx. Amperometric response was measured as a function of concentration of glucose at a fixed potential of +0.38 V vs. Ag/AgCl in a phosphate-buffered saline solution (pH 7.0). Results clearly showed that the ferrocene groups on the co-polymer play the role of electron transfer mediator between the redox center of glucose oxidase (GOx) and the surface of the electrode. Also, the effects of pH and temperature, storage, reusability and interference of the amperometric glucose biosensor were investigated. © 2011 Elsevier B.V. All rights reserved.

Surgit O.,Fatih University
Surgical Laparoscopy, Endoscopy and Percutaneous Techniques | Year: 2010

Background: Laparoscopic surgery has long been the treatment of choice for recurrent or bilateral hernias, and for unilateral hernias when the patient does not want to undergo open surgery. Each laparoscopic incision or trocar presents risks for hemorrhage, organ injury, incisional hernia, and poor cosmetic outcome. For this reason, single-incision laparoscopic surgery (SILS) is being increasingly used to treat a variety of conditions. The aim of this study was to evaluate the use of SILS for total extraperitoneal (TEP) repair of hernias in the largest series performed to date. PATIENTS and Methods: During the period from June to September 2009, 23 consecutive patients underwent SILS for TEP repair of inguinal hernias. SILS was performed under general anesthesia, with the use of a single access port device and articulating as well as standard laparoscopic instruments. Demographic and clinical data, intraoperative findings, and postoperative course were recorded. Results: In the 23 patients (mean age 48.4y; 18 males and 5 females), a total of 27 hernias were repaired. Unilateral hernias were present in 19 patients and bilateral hernias in four. Of the unilateral hernias, 11 were on the right and 8 on the left. Indirect hernias occurred in 15 patients, direct hernias in 7 patients, and a direct+indirect hernia was seen in 1 patient. All hernias were repaired successfully with SILS except in 1 patient. In this patient, due to the large size of the hernia and the presence of adhesions, the procedure was converted to a standard laparoscopic TEP repair. Mean operative times for unilateral and bilateral hernias were 48.4 minutes (range: 32-62min) and 96.7 minutes (range: 85-120min), respectively. None of the patients experienced intraoperative or postoperative complications. Mean hospital stay was 1.17 days. Conclusions:The use of SILS for TEP repair of hernias provides excellent cosmetic results, and articulating instruments seem to be useful for this procedure. Copyright © 2010 by Lippincott Williams & Wilkins.

Sevkli M.,Fatih University
International Journal of Production Research | Year: 2010

Supplier selection is vital to the success of a manufacturing firm. Supplier selection is a multi-criteria decision-making problem and is of strategic importance for most companies. As the conventional methods for supplier selection are inadequate for dealing with the imprecise or vague nature of linguistic assessment, a new method called the fuzzy technique for ELECTRE (ELimination Et Choix Traduisant la REalite) is proposed. The aim of this study is to compare and contrast crisp and fuzzy ELECTRE methods for supplier selection. The proposed methods are applied to a manufacturing company in Turkey. After determining the criteria that affect the supplier selection decisions, the results for both crisp and fuzzy ELECTRE methods are presented. © 2010 Taylor & Francis.

MnxNi1-xFe2O4 (x=0.2, 0.4, 0.6) nanoparticles were synthesized by a polyethylene glycol (PEG)-assisted hydrothermal route. We present a systematic investigation on the structural, magnetic, electrical and dielectric properties of the products by using XRD, FT-IR, SEM, TGA, VSM and dielectric spectroscopy, respectively. Single phased cubic spinel structure was confirmed for all samples and the average crystallite size of the products was estimated using Line profile fitting and ranges between 6.5 and 11 nm. The nanoparticles have ferromagnetic nature with small coercivity. The samples showed semiconducting behavior which is revealed from temperature dependent conductivity measurements. Temperature and frequency dependent dielectric property; dielectric permittivity (ε) and ac conductivity (σAC) studies for the samples indicated that the dielectric dispersion curve for all samples showed usual dielectric dispersion confirming the thermally activated relaxation typical for Debye-like relaxation referring to it as the Maxwell-Wagner relaxation for the interfacial polarization of homogeneous double structure. The particle size, saturation magnetization, coercive field, conductivity and dielectric constant of the samples are strictly temperature dependent and increased with Mn concentration. © 2012 Elsevier Ltd and Techna Group S.r.l.

Gonca E.,Fatih University
Journal of Fluorine Chemistry | Year: 2013

By cyclotetramerization of 2,3-bis[2-fluoro-5-(trifluoromethyl)benzylthio] maleonitrile in the presence of magnesium butanolate, magnesium porphyrazinate carrying eight (2-fluoro-5-(trifluoromethyl)benzylthio) functional groups on the periphery positions has been synthesized. Conversion of the magnesium porphyrazinate into the metal-free derivative was achieved by treatment with trifluoroacetic acid. Further reaction of this product with different metal (II) acetates have led to the metallo porphyrazines. Then, chloro-octakis [2-fluoro-5-(trifluoromethyl)benzylthio] porphyrazinato iron (III) (FePzCl) was prepared by the reaction of metal-free porphyrazine with iron (II) acetate and further treatment with HCl solution. The monomeric bisaxial complex FePz(py)2 as well as the bridged complex [FePz(pyz)]n were formed as stable complexes by reacting FePzCl with pyridine or pyrazine, respectively. These novel complexes were characterized by elemental analysis, together with FT-IR, 1H NMR, 13C NMR, 19F NMR, UV-vis and mass spectral data. © 2013 Elsevier B.V.

Tanveer M.,Fatih University | Tezcanli Guyer G.,Fatih University
Renewable and Sustainable Energy Reviews | Year: 2013

The use of solar radiation in wastewater treatment is a shift of artificial ultraviolet light to renewable and sustainable solar source. Various types of concentrating and non-concentrating solar reactors have been used in wastewater treatment applications. This study reviews the application, design and operational parameters of compound parabolic collector (CPC) for wastewater treatment. It is the most promising type of non-concentrating collectors which is better than concentrating collector. Details of CPC design parameters like reflective surface, absorbing tube material, absorbing tube diameter, and acceptance angle have been elaborated. Core operational parameters like photo catalyst types and their optimum concentration, pH and light intensity have also been undertaken. Application of CPC in wastewater treatment and water disinfection has been explained in the final part of the paper. © 2013 Elsevier Ltd.

Uzer A.,Fatih University
Computers and Mathematics with Applications | Year: 2010

A multiplicative calculus dealing with real valued functions is extended to a multiplicative type complex calculus (MCC) dealing with complex valued functions. Some fundamental theorems and concepts of the classical calculus are interpreted from the view point of the MCC and the analogies between them are given. Also new notations for the MCC are defined. The MCC is distinguished from the classical calculus by calling the classical calculus as the additive type complex calculus (ACC). © 2010 Elsevier Ltd. All rights reserved.

Caliskan S.,Fatih University
Physics Letters, Section A: General, Atomic and Solid State Physics | Year: 2013

Spin polarized Density Functional Theory combined with Non-Equilibrium Green's Function Formalism is applied to investigate the spin dependent transport in carbon based monatomic systems. Both one-dimensional linear and ring structures sandwiched between spin polarized nickel electrodes are examined. Incorporating of nickel electrodes and rings leads to interesting spin dependent properties. The influence of electrode structure is also addressed, using the Ni(100) pyramidal and plane electrodes. It is revealed that spin dependent behavior is largely determined by the atomic arrangement of the monatomic system, and that both the transport and magnetic properties can be tuned by odd-even disparity and/or appropriate ring(s). The mechanisms governing the spin dependent properties in these structures are discussed. © 2013 Elsevier B.V. All rights reserved.

A film of chitosan-polypyrrole-gold nanoparticles was fabricated by in-situ chemical synthesis method and its application in glucose biosensor was investigated. The obtained biosensor exhibited a high and reproducible sensitivity of 0.58 μA/mM, response time ~ 4 s, linear dynamic range from 1 to 20 mM, correlation coefficient of R2 = 0.9981, and limit of detection (LOD), based on S/N ratio (S/N = 3) of 0.068 mM. A value of 1.83 mM for the apparent Michaelis-Menten constant was obtained. The resulting bio-nanocomposite provided a suitable environment for the enzyme to retain its bioactivity at considerably extreme conditions, and the decorated gold nanoparticles in the bio-nanocomposite offer good affinity to enzyme. © 2014 Published by Elsevier B.V.

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