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Search Results: 1 - 10 of 50571 matches for " Ecir Y?lmaz "
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Dithiooxamide Modified Glassy Carbon Electrode for the Studies of Non-Aqueous Media: Electrochemical Behaviors of Quercetin on the Electrode Surface
Ay?en Demir Mülaz?mo?lu,Ecir Ylmaz,?brahim Ender Mülaz?mo?lu
Sensors , 2012, DOI: 10.3390/s120403916
Abstract: Electrochemical oxidation of quercetin, as an important biological molecule, has been studied in non-aqueous media using cyclic voltammetry, electrochemical impedance spectroscopy and scanning electron microscopy. To investigate the electrochemical properties of quercetin, an important flavonoid derivative, on a different surface, a new glassy carbon electrode has been developed using dithiooxamide as modifier in non-aqueous media. The surface modification of glassy carbon electrode has been performed within the 0.0 mV and +800 mV potential range with 20 cycles using 1 mM dithioxamide solution in acetonitrile. However, the modification of quercetin to both bare glassy carbon and dithiooxamide modified glassy carbon electrode surface was carried out in a wide +300 mV and +2,800 mV potential range with 10 cycles. Following the modification process, cyclic voltammetry has been used for the surface characterization in aqueous and non-aqueous media whereas electrochemical impedance spectroscopy has been used in aqueous media. Scanning electron microscopy has also been used to support the surface analysis. The obtained data from the characterization and modification studies of dithioxamide modified and quercetin grafted glassy carbon electrode showed that the developed electrode can be used for the quantitative determination of quercetin and antioxidant capacity determination as a chemical sensor electrode.
A Research on the Impacts of Core Employees on the Performances of SME’s  [PDF]
Kurtulu? Ylmaz Gen?
Sociology Mind (SM) , 2014, DOI: 10.4236/sm.2014.43021
Abstract:
This study includes a research on the impacts of core employees on the perceived performances of Small and Medium Sized Enterprises (SME’s). Employees, who are working at manufacturing department or basic function, were taken as core employees in the frame of the research. This research was conducted at the Middle and Eastern Black Sea region of Turkey; at 60 SME’s. The research was realised on the bases of the resource-based view of the firm; the relation between the characteristics of core employees as rareness, hardness to imitation and the perceived performances of SME’s were given. This study contributes to the literature for its regional focus to the topic and for the presentation of how SME’s perceive organizational performance as dimensional context. The results of the research didn’t support the hypothesis which claims that there is a positive relationship between the expertises of core employees, whose superior characteristics are specific to firms and the organizational performance.
Generalized K?the-Toeplitz Duals of Some Vector-Valued Sequence Spaces
Ylmaz Ylmaz
International Journal of Analysis , 2013, DOI: 10.1155/2013/862949
Abstract: We know from the classical sequence spaces theory that there is a useful relationship between continuous and -duals of a scalar-valued FK-space originated by the AK-property. Our main interest in this work is to expose relationships between the operator space and and the generalized -duals of some -valued AK-space where and are Banach spaces and . Further, by these results, we obtain the generalized -duals of some vector-valued Orlicz sequence spaces. 1. Introduction The idea of dual sequence space was introduced by K?the and Toeplitz [1]. Then, Maddox, [2], generalized this notion to -valued sequence classes where is a Banach space. This brings an important contribution to the operator matrix transformation of Banach space-valued sequence spaces. Remember that - and -duals of a (complex-valued) sequence space , denoted by and , respectively, are defined to be where is the space of all complex-valued sequences. The in the classical definitions of K?the-Toeplitz duals is replaced by a sequence of linear operators, not necessarily continuous, from into another Banach space . Thus, if is a nonempty set of sequences with , then generalized - and -duals of are defined to be respectively. It is clear that this notion depends on the space and if , then where is the space of all linear operators from into . Without the loss of generality we can restrict ourselves in this work to continuous operators and being the space of all continuous linear operators from into and being the space of all -valued sequences which is a natural generalization of . We know from the classical sequence spaces theory that there is a useful relationship between continuous and -duals of a sequence space whenever it has the AK-property. Related results are also expressed in [3, page 176]. Here, we are going to show that there is an analogue relationship for -valued sequence spaces in the context of generalized -duals with respect to another fixed Banach space . Further, by applying this result, we obtain generalized -duals of some vector-valued Orlicz sequence spaces. We think that our results give a fruitful way to find generalized duals of this kind of vector-valued sequence spaces. 2. Prerequisites We use the notations , and for the sets of all positive integers, complex numbers, and real numbers, respectively. For some locally convex (lc, for short) space denotes the continuous dual of and we denote by and the closed unit ball and the sphere of some normed space , respectively. An FH-space is an lc Fréchet space such that is a vector subspace of a Hausdorff topological vector space
A Dynamic Model of Mixed Duopolistic Competition: Open Source vs. Proprietary Innovation  [PDF]
Suat Akbulut, Murat Ylmaz
Theoretical Economics Letters (TEL) , 2015, DOI: 10.4236/tel.2015.56085
Abstract: We model the competition between a proprietary firm and an open source rival, by incorporating the nature of the GPL, investment opportunities by the proprietary firm, user-developers who can invest in the open source development, and a ladder type technology. We use a two-period dynamic mixed duopoly model, in which a profit-maximizing proprietary firm competes with a rival, the open source firm, which prices the product at zero, with the quality levels determining their relative positions over time. We analyze how the existence of open source firm affects the investment and the pricing behavior of the proprietary firm. We also study the welfare implications of the existence of the open source rival. We find that, under some conditions, the existence of an open source rival may decrease the total welfare.
Industry Orientation, Exporting and Productivity  [PDF]
Ylmaz K?l??aslan, Levent Erdo?an
Modern Economy (ME) , 2012, DOI: 10.4236/me.2012.31012
Abstract: This paper aims to analyse the relation between exporting behaviour of the firms and productivity by testing for learning by exporting hypothesis in Turkish manufacturing industry. Moreover, this study examines whether exporting and productivity relations change with respect to the orientation of industry in which the firm operates. We use the data on the largest 1000 industrial enterprises of Turkey from 1997 to 2007. The results based on unbalanced dynamic panel data models estimated show that there is no evidence that exporting fosters productivity at the firm level in Turkish manufacturing industry. Disaggregation of industries with respect to their orientations does not change this result. Exporting, or increase in the exports of the firm, doesn’t seem to be one of the sources of productivity growth at least for the firms already exporting in Turkish manufacturing.
p-ANCA and c-ANCA frequency and their relationship with other diseases in patients with lung cancer
Ahmet Ylmaz,Hatice Ylmaz
Journal of Clinical and Experimental Investigations , 2011,
Abstract: Objectives: In this study, we aimed to investigate the association of cancer with vasculitis and the frequency of cancer-related paraneoplastic syndromes and their relationship by measuring blood levels of Perinuclear type Anti-Neutrophilic Cytoplasmic Antibody (p-ANCA) and Cytoplasmic type antineutrophil cytoplasmic antibodies (c-ANCA) in patients with lung cancer and asthma and in healthy individuals.Materials and methods: 20 patients diagnosed with asthma, 26 patients following up with a diagnosis of lung cancer and control group of 20 healthy individuals were enrolled in this study. ANCA levels were measured in blood samples.Results: Borderline positive c-ANCA detected in 1 of 26 patients and 1/32 percent were positive detected in one patient. Borderline positive p-ANCA detected in 1 of 26 patients and 1/32 percent were positive detected in 1 patient. p-ANCA was positive detected in 2/20 of asthmatic patient and c-ANCA was borderline positive detected in 1/20 asthma patient. In asthma and cancer patients, physical examinations and pathological findings did not support the vasculitis. Only one subject in the control group was found to be borderline positive for c-ANCA.Conclusion: As a result, in some of the patients the positivity of ANCA was detected not related with vasculitis and paraneoplastic findings. Because of this, vasculitis should be considered in differential diagnosis of the patients whom considered as malignancy. J Clin Exp Invest 2011; 2 (4): 384-387Key words: p-ANCA, c-ANCA, paraneoplastic syndrome, lung cancer
On Two Problems for Matrix Polytopes  [PDF]
?erife Ylmaz, Taner Büyükk?ro?lu
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.517253
Abstract: We consider two problems from stability theory of matrix polytopes: the existence of common quadratic Lyapunov functions and the existence of a stable member. We show the applicability of the gradient algorithm and give a new sufficient condition for the second problem. A number of examples are considered.
The Performance of the Higher-Order Radiation Condition Method for the Penetrable Cylinder
Bülent Y lmaz
Mathematical Problems in Engineering , 2007, DOI: 10.1155/2007/17605
Abstract: We have considered the scattering of a plane wave by a penetrable acoustic circular cylinder. The boundary conditions are continuity of the total pressure and the total velocity. The wave speed and density of the target are different from that of the surrounding medium. We investigated the performance of higher-order SRCs up to L4 operator in two dimensions. We assume that in the rectangular Cartesian system of axes, (x,y,z), the z axis coincides with the axis of the cylinder and an incident wave propagates in a direction perpendicular to the z axis. All the field quantities are then independent of z. Numerical results are added to present the change of the module of the total field and the magnitude of the far field with respect to θ.
L’Enseignement en fran ais de la traduction en Turquie (le cas de l’Université d’Istanbul)
Arsun Uras Ylmaz
Synergies Turquie , 2008,
Abstract: L’objectif est de mettre en évidence la situation actuelle des départements de traduction et d’interprétation des universités en Turquie, notamment celle de l’université d’Istanbul. Dans ce cadre, nous visons à expliciter la position et le r le de ces départements dans l’enseignement universitaire et aussi dans le milieu professionnel. Après avoir fixé le nombre et démontré le cursus de ces départements en Turquie, nous faisons une brève présentation du contenu et de l’objectif des cours de l’université d’Istanbul. Ensuite, nous voudrions ouvrir à la discussion les problèmes rencontrés et les solutions offertes. Dans le cadre des projets que nous proposons en vue d’atteindre le niveau international en traduction/traductologie, il faudrait multiplier les conventions bilatérales avec les pays de l’Union européenne et organiser des activités comme les séminaires, les colloques, les symposiums (etc.) afin d’assurer un milieu d’échange, tant pour les étudiants que pour les enseignants chercheurs, mais aussi pour ceux qui sont intéressés par la traduction et/ou qui l’exercent comme profession
E itim Seviyesindeki Yükselmenin Geleneksel Aile Anlay n n De i imine Etkisi: Karabük üniversitesi rne i
Sinan Ylmaz
Tarih Kültür ve Sanat Ara?t?rmalar? Dergisi , 2012,
Abstract: zetGünümüzde aile ile ilgili yeni yakla mlar ortaya km ve geleneksel aile anlay lar de i meye ba lam t r. Evlilik ya n n yükselmesi, bo anmalar n artmas , nikahs z birlikte ya ama anlay n n yayg nla maya ba lamas , hanehalk say s n n kü ülmesi, ocuk say s n n azalmas vb. yeni yakla m ve anlay lar, s radan bir insan n bile g zlemleyebilece i l üde yayg nla m t r. Aile ile ilgili yeni anlay lar n ortaya kmas n tetikleyen elbette pek ok neden vard r. Bu ara t rmada, aile ile ilgili bu yeni anlay lar n ortaya kmas nda e itimin rolünün ne oldu u ara t r lmaktad r. Ara t rmada, aile anlay nda meydana gelen de i melerle ilgili olarak Tü K verilerinden yararlan ld gibi üniversite rencileri üzerinde yapm oldu umuz bir ara t rman n sonu lar na da yer verilmi tir. statistiksel veriler e itim seviyesinin dü ük oldu u d nemlerle kar la t r lm , b ylece e itim seviyesindeki yükselmenin nas l bir de i im ve d nü üme neden oldu u tespit edilmeye al lm t r. zellikle ikinci dünya sava sonras nda aile ile ilgili olarak Avrupa ve Amerika’da ya anan geli meler de incelenmi ve Türk ailesindeki geli melerle kar la t r larak benzer d nü ümlerin ya an p ya anmayaca tart lm t r. Today, new approaches about the family have emerged, and traditional family patterns have started to change. The increase of marriage age, the increase in the number of divorces, the tendency for cohabitation, the decrease in the number of family members and the decline in the number of offspring have become so wide-spread that these changes could be easily observed even by ordinary people. There are, of course, a lot of reasons that stimulate these new approaches about the family, yet this study focuses upon the role of education concerning the emergence of these new concepts about the family.In the study, the data taken from TUIK, as well as the results of a survey about the changes in the family patterns carried out on the university students are used. The statistical data are compared with the data of the previous periods in which the level of education was low. Additionally, the study examines how the increase in the level of education has brought about transformation in the traditional family patterns. Moreover, the transformations of family patterns in Europe and America, particularly after the Second World War, are studied, and these transformations are compared with the similar changes in the Turkish family patterns. The study also discusses whether the same transformations could be seen in Turkish family.RésuméAujourd’hui, de nouvelles approch
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