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Search Results: 1 - 10 of 53099 matches for " Kurtulu? Y?lmaz Gen? "
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A Research on the Impacts of Core Employees on the Performances of SME’s  [PDF]
KurtuluYlmaz Gen
Sociology Mind (SM) , 2014, DOI: 10.4236/sm.2014.43021
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.
Hepatitis a Seroprevalence Among 2-6 Year-Old Children of Low Socioeconomic Class Families
Gen, G.,Ylmaz, G.,Karacan, C.,Atay, N.
Erciyes Medical Journal , 2006,
Abstract: Purpose: Hepatitis A infection is an important public health problem in our country. However, its endemicity pattern has been changing in recent years both worldwide and in our country. The purpose of this study was to determine the seroprevalence of Hepatitis A infection among 2-6 year-old children of low socioeconomic class families.Material and Methods: This study was conducted on children of low socioeconomic class families who were expected to experience hepatitis A infection early in their life. Hepatitis A IgM and IgG antibody levels were determined on 736 children from 2 to 6 years old. Results: Three hundred and fifty-two were female and 384 were male among the 736 children. Ig G antibodies were found to be positive in 26 (3.5%) children. Conclusions: We recommend vaccination of children at preschool age. However, further epidemiologic studies are necessary concerning different socioeconomic levels. Following the results it may be possible to vaccinate children without determining antibody status if hepatitis A seropositivity is determined to be low at this age.
Mehmet Akkurt,ülkü Ylmaz,Hasan Kü?ükbay,Mustafa Gen?aslan
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536808042761
Abstract: The title compound, C26H26N2S2, was synthesized from bis[1,3-bis(3-phenylpropyl)benzimidazolidine-2-ylidene] and CS2 in toluene. The molecular structure is composed of a benzimidazole ring system with two phenylpropyl substituents and a dithiocarboxylate group in the 2-position. The benzimidazole unit is essentially planar, with a maximum atomic deviation of 0.008 (2) , and makes dihedral angles of 72.72 (10) and 27.62 (12)°, with the two phenyl rings. The dihedral angle between the two phenyl rings is 55.98 (15)°. The molecular packing is stabilized by a C—H...S intermolecular hydrogen-bonding interaction and a C—H...π interaction between a benzene H atom and the phenyl ring of a neighbouring molecule.
Retrospective Cohort Study of the Prevalence of Lumbosacral Transitional Vertebra in a Wide and Well-Represented Population
Demet U?ar,Bekir Yavuz U?ar,Yahya Co?ar,Kurtulu? Emrem,Gürkan Gümü?suyu,Serhat Mutlu,Burcu Mutlu,Mehmet Akif ?a?an,Ylmaz Mertsoy,Hatice Gümü?
Arthritis , 2013, DOI: 10.1155/2013/461425
Abstract: Purpose. The aim of this study is to determine the prevalence of lumbosacral transitional vertebra (LSTV) in a well-represented general population. Methods. For a retrospective cohort study, abdominal radiographs of adult subjects were queried with clear visibility of the vertebral body articulation of the last rib, all lumbar transverse processes, and complete sacral wings. Exclusion criteria included any radiologic evidence of previous lumbosacral surgery that would block our view. A total of 6200 abdominal films were reviewed, and 3607 were identified as being suitable for the measurement of the desired parameters. Results. A total of 3607 subjects were identified as eligible for the study, and 683 (18.9%) were classified as positive for a lumbosacral transitional vertebra. The prevalence of sacralization and lumbarization was found as 17.2% and 1.7%, respectively. The average age at the time of the study was years (18–86 years). Conclusions. As a result of different opinions, LSTV retains its controversial status. Our prevalence study of the general population will provide assistance for resolution of the controversy. Prevalence studies of the general population with a wide participation will shed light on comparative studies. 1. Introduction Lumbosacral transitional vertebra (LSTV) is a congenital vertebral anomaly of the L5-S1 junction in the spine [1]. LSTV occurs because of sacralization in which one or both of the transverse processes of the fifth lumbar vertebra exhibits fusion with the first sacral segment or as a result of lumbarization in which the first sacral segment exhibits an abnormal transverse process similar to that of the lumbar vertebra. This modification may contribute to incorrect determination of a vertebral segment, which can lead to surgery at the wrong level and unresolved symptoms [1]. LSTV is evaluated with lumbosacral anteroposterior radiographs, and abdominal radiographs may also show this anomaly. Abdominal radiographs, as radiographic examinations for abdominal indications, have many clinical uses and are most often indicated for patients who exhibit signs of intestinal obstruction or visceral perforation. In this study, a different purpose was pursued. We used abdominal radiographs which were with clear visibility of the last rib’s vertebral body articulation, all lumbar transverse processes, and the complete sacral wing to provide radiographic images of the lumbar spine. For a study evaluating LSTV cases, the use of these radiographs was desirable as they are likely to be representative of the general population. The
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.
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