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Search Results: 1 - 10 of 227059 matches for " Mustafa ?zgür Yayli "
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An Efficient Analytical Method for Vibration Analysis of a Beam on Elastic Foundation with Elastically Restrained Ends
Mustafazgür Yayli,Murat Aras,Süleyman Aksoy
Shock and Vibration , 2014, DOI: 10.1155/2014/159213
Abstract: An efficient analytical method for vibration analysis of a Euler-Bernoulli beam on elastic foundation with elastically restrained ends has been reported. A Fourier sine series with Stoke’s transformation is used to obtain the vibration response. The general frequency determinant is developed on the basis of the analytical solution of the governing differential equation for all potential solution cases with rigid or restrained boundary conditions. Numerical analyses are performed to investigate the effects of various parameters, such as the springs at the boundaries to examine how the elastic foundation parameters affect the vibration frequencies. 1. Introduction Beams resting on elastic foundations have wide application in engineering practice. The vibration analysis of beams is investigated using various elastic foundation models, such as, Vlasov, Pasternak, and Winkler models. A number of studies have been performed to predict the dynamic response of beams on elastic foundations with different boundary conditions. Numerous works have been performed to explore the static deflection and vibration response of the beams resting on various elastic foundations. Chun [1] has investigated free vibration of hinged beam. Maurizi et al. [2] have considered the vibration frequencies for a beam with different boundary conditions. Vibration of beams on partial elastic foundations has been studied by Doyle and Pavlovic [3]. Laura et al. [4] have investigated beams which carry concentrated masses subject to an axial force. Abbas [5] has investigated vibration of Timoshenko beams with elastically restrained ends. Free vibration and stability behavior of uniform beams and columns with nonlinear elastic end rotational restraints has been considered by Rao and Naidu [6]. Free vibration behaviour of an Euler-Bernoulli beam resting on a variable Winkler foundation has been considered by Kacar et al. [7]. Civalek [8] has implemented differential quadrature and harmonic differential quadrature methods for buckling analysis of thin isotropic plates and elastic columns. H. K. Kim and M. S. Kim [9] have considered vibration of beams with generally restrained boundary conditions. A number of studies have been reported investigating the free vibration of beams on elastic foundation [10–25]. Although vibration analysis of beams on elastic foundation is a widely studied topic, there are only few papers that exist in the literature pertaining to the analysis of beams with elastically restrained ends. In this study, an efficient method is introduced for the analysis of the free
Customer’s Advisory as a Facilitator of Innovation and a Game-Changer in the Competition
Mustafazgür Güng?r
Business Systems Review , 2012, DOI: 10.7350/bsr.a07.2012
Abstract: In the beginning of higher-competition decades, organizations were forced to analyze and revise their processes for optimization. They needed to reinvent better ways to execute their core businesses. The challenge was also linked to dynamism in buyer behavior, the ever-changing needs and wants, and decrease in the customer loyalty due to discontent, and parallel to that due to the variety of offers in market place. From this perspective, the focus of innovativeness to remain competitive enforces firms to develop new perspectives in consumer behavior analysis, whereby “customer’s advisory” is the core to pull this stakeholder group to the process of creativity. In this paper, the need to obscure “customer’s advisory” is underlined in the right composure to address an easier and inexpensive tool to evaluate services of the organization. In addition, author highlights the requirements and explains the use of it as a driver of innovative corporate thinking for new features and services.
NMR SPECTROSCOPIC STUDY AND DFT CALCULATIONS OF VIBRATIONAL ANALYSES, GIAO NMR SHIELDINGS AND 1JCH, 1JCC SPIN-SPIN COUPLING CONSTANTS OF 1,7-DIAMINOHEPTANE
zgür Alver, Cemal Parlak, Mustafa enyel
Bulletin of the Chemical Society of Ethiopia , 2009,
Abstract: Vibrational frequencies and approximate mode descriptions of 1,7-diaminoheptane (dahp) have been determined via Becke-3-Lee-Yang-Parr (B3LYP) density functional method with 6-31G(d) basis set. 1H, proton coupled and uncoupled 13C, 15N, DEPT, COSY, HETCOR, INADEQUATE NMR spectra and the magnitude of one bond 1JCH, 1JCC coupling constants of dahp (C7H18N2) have been reported for the first time. 1H, 13C, 15N NMR chemical shifts and 1JCH, 1JCC coupling constants of dahp have been calculated by means of B3LYP density functional method with 6-311++G(d,p) basis set. Comparison between the experimental and the theoretical results indicates that density functional B3LYP method is able to provide satisfactory results for predicting vibrational frequencies and NMR properties. KEY WORDS: 1,7-Diaminoheptane, Vibrational assignments, NMR, GIAO, DFT Bull. Chem. Soc. Ethiop. 2009, 23(1), 85-96.
NMR spectroscopic study and DFT calculations of vibrational analyses, GIAO NMR shieldings and 1JCH, 1JCC spin-spin coupling constants of 1,7-diaminoheptane
zgür Alver,Cemal Parlak,Mustafa ?enyel
Bulletin of the Chemical Society of Ethiopia , 2009,
Abstract: Vibrational frequencies and approximate mode descriptions of 1,7-diaminoheptane (dahp) have been determined via Becke-3-Lee-Yang-Parr (B3LYP) density functional method with 6-31G(d) basis set. 1H, proton coupled and uncoupled 13C, 15N, DEPT, COSY, HETCOR, INADEQUATE NMR spectra and the magnitude of one bond 1JCH, 1JCC coupling constants of dahp (C7H18N2) have been reported for the first time. 1H, 13C, 15N NMR chemical shifts and 1JCH, 1JCC coupling constants of dahp have been calculated by means of B3LYP density functional method with 6-311++G(d,p) basis set. Comparison between the experimental and the theoretical results indicates that density functional B3LYP method is able to provide satisfactory results for predicting vibrational frequencies and NMR properties.
NMR spectroscopic study and DFT calculations of GIAO NMR shieldings and 1JCH spin-spin coupling constants of 1,9-diaminononane
zgür Alver,Cemal Parlak,Mustafa ?enyel
Bulletin of the Chemical Society of Ethiopia , 2009,
Abstract: 1H, proton coupled and decoupled 13C, DEPT, HETCOR NMR spectra, the magnitude of one bond 1JCH coupling constants and 13C NMR spin-lattice relaxation time (T1) of 1,9-diaminononane (danon, C9H22N2) have been reported for the first time. 1H, 13C NMR chemical shifts and 1JCH coupling constants of danon have been calculated by means of B3LYP density functional method with 6-311++G(d,p) basis set. Comparison between the experimental and the theoretical results indicates that density functional B3LYP method is able to provide satisfactory results for predicting NMR properties.
On the Logarithmic Regularity Conditions for the Variable Exponent Hardy Type Inequality
Aziz Harman,Mustafazgür Kele?
International Journal of Analysis , 2014, DOI: 10.1155/2014/606012
Abstract: We discuss a logarithmic regularity condition in a neighborhood of the origin and infinity on the exponent functions and for the variable exponent Hardy inequality to hold. 1. Introduction There are several papers devoted to the variable exponent Hardy inequality: Let be positive measurable functions and , ; then inequality (1) and (2) hold under certain conditions on the weight functions , and the exponents , . Two types of conditions arise here: a balance condition on the weights and a regularity condition on the exponents (see below). Necessary and sufficient conditions for the validity of general inequality (1) were found in [1] for the case of , in [2] for cases and , in [3] for cases and , and in [4] for mixed cases and ??( and ). Some special cases of (1) are studied in [5–10] too. So, the inequality is a particular case of (1) when , and , where is the Hardy operator. For the constant exponents , this inequality holds if , (see, e.g., [11]). Necessary and sufficient conditions on the , for inequality (2) to hold are and if the exponents , are continuous near the origin and infinity such that the conditions are satisfied (see, e.g., [5–7, 9]). In [8] (see also [10]) it was proved that the condition is necessary for inequality (2) to hold if one of these exponents is a constant. Also, it was proved in [10] that the condition is sufficient for inequality (2) to hold on bounded interval if a constant in the condition for the satisfies and the is zero. The condition is weaker then . Also the function satisfies the condition but does not satisfy . In this note, we will focus on the results of sufficiency and necessity of regularity conditions , , and below for inequality (2) to hold. The space of functions is introduced as the class of measurable functions in , which have a finite modular. A norm in is given in the form As to the basic properties of spaces , we refer to [12]. 2. Main Results We will state some sufficiency and necessity assertions concerning inequality (2). Along the way, it will be given a proof for two elementary estimates that we had used. Let us introduce the following classes of measurable functions. We say, is in the class if is in the class if and is in the class if Theorem 1 (see [8]). Suppose and is an increasing function on such that is continuous at and , ; then for the inequality to hold it is necessary that . Theorem 2 (see [8]). Suppose and is a decreasing function on such that is continuous at and , ; then for the inequality to hold it is necessary that . Theorem 3. Suppose is measurable functions such that , , , ; then
Spondyloepiphyseal Dysplasia Tarda in Twins
Ferhat ?ekmez,Mustafazgür Pirgon,?lhan Asya Tanju
Güncel Pediatri , 2011,
Abstract: Introduction: Spondyloepiphyseal dysplasia (SED) is a genetically heterogeneous disorder often associated with the early onset of osteoarthrosis. The X-linked recessive form (SEDL) affects boys and is characterized by reduced height, arm span exceeding total height, and barrel chest deformity. The radiographic phenotype comprises a hump-shaped deformity of vertebral bodies and mild epiphyseal dysplasia of the femoral head associated with early signs of hip arthrosis.The disorder is caused by mutations in the SEDL (or sedlin) gene on Xp22.12-p22.31. SED should be kept in mind as a differential diagnosis in men with early “primary” bilateral osteoarthrosis.Case Report: Here, 11 years old twins diagnosed as SED due to walking disability, limitation of joint motion, pain at the hips and disability in standing for a long time were presented. Discussion: This rare skelatal dysplasia must be kept in mind in patients with painful spine and hip joints, and walking disability. (Jo-ur-nal of Cur-rent Pe-di-at-rics 2011; 9: 97-9)
THE ASSOCIATION OF COMMON ATRIUM AND SMITH-LEMLI-OPITZ SYNDROME IN AN INFANT
Ahmet Sert,zgür Pirgon,Mehmet Emre Atabek,Mustafa Dogan
Marmara Medical Journal , 2008,
Abstract: Smith-Lemli-Opitz syndrome is a rare syndrome presenting with multiple congenital anomalies/mental retardation associated with low plasma cholesterol levels. The spectrum of severity extends from prenatal death with holoprosencephaly or other lethal malformations, to patients with minimal physical abnormalities and normal intelligence or minimal intellectual impairment. Congenital heart defect is found in half of the Smith-Lemli-Opitz syndrome patients. To our knowledge, the association of common atrium and Smith-Lemli-Opitz syndrome has not been described before in the medical literature. We present a 4-month-old infant case of such association.
(Z)-Ethyl 4-chloro-2-[(4-chlorophenyl)hydrazono]-3-oxobutanoate
G?khan Alpaslan,zgür ?zdamar,Mustafa Odaba?o?lu,Orhan Büyükgüng?r
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536807065300
Abstract: The title compound, C12H12Cl2N2O3, crystallizes as a non-merohedral twin with a twinning ratio of 0.51:0.49. The molecule adopts a keto–hydrazo tautomeric form stabilized by an intramolecular N—H...O hydrogen bond. The configuration around the N—N bond is trans.
Duplicated urethra and a possible mullerian-renal-cervical spine (MURCS) association in a male child: a case report
?a?r? Güneri,Lütfi Tun?,Fazl? Polat,Mustafazgür Tan
Turkish Journal of Urology , 2012,
Abstract: We report on a 2-year-old boy who was referred to our clinic with recurrent urinary tract infections, neurogenic bladder dysfunction and duplicated urethra. The child was unable to void spontaneously, and a suprapubic catheter had been placed. We performed an internal urethrotomy on his patent urethra, but the procedure did not successfully restore spontaneous voiding. After the surgery, we evaluated the child for the presence of congenital syndromes, especially the MURCS (Mullerian-Renal-Cervical Spine) association. Six months later, the patient underwent a left orchiopexy procedure. There was no evidence of the right testis. This case shows that the male variant of the MURCS association may accompany miscellaneous urogenital anomalies such as renal agenesis, cross renal ectopy, vesicoureteral reflux, neurogenic bladder dysfunction, posterior urethral valve, duplicated urethra, bilateral/unilateral undescended testes or vanishing testis.
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