Scopus İndeksli Yayınlar Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/20.500.12416/8651
Browse
115 results
Search Results
Correction A Simple Analytical Eam Model for Some Bcc Metals (Retraction of Vol 15, Pg 1259, 2010)(Elsevier Science Bv, 2011) Dursun, Ibrahim H.; Guvenc, Ziya B.; Kasap, E.Article Citation - WoS: 8Citation - Scopus: 9Diffraction of Waves by an Impedance Half-Plane(Elsevier Science Bv, 2013) Umul, Y. Z.The solution of the diffraction problem of waves by an impedance half-plane that satisfies the impedance boundary condition is obtained for the first time in the literature. A reflection coefficient which is the function of the angular and spatial variables in the polar coordinates is defined and its exact expression is obtained with the aid of the impedance boundary condition. The resultant diffraction field is compared with the solution of Malyuzhinets numerically and their differences are stressed. The structures of the total scattered, geometrical optics and diffracted waves are also investigated. (C) 2013 Elsevier B.V. All rights reserved.Conference Object Citation - WoS: 17Citation - Scopus: 26Using User-Centered Design Approach in Course Design(Elsevier Science Bv, 2010) Kahraman, Z. Ezgi HalilogluUser-centered design approach is a contemporary design approach which actively involves users at every stage of the design process for the development of more effective, efficient and safe products. This paper is based on a case study that attempts to adapt this approach into course design in order to increase the effectiveness of teaching, and the learnability and success of university students. The paper discusses the phases of the designing process including analysis of student needs, limitations and expectancies in the teaching process, designing teaching activities, and assessment of students about courses designed with respect to user-centered design approach (C) 2010 Elsevier Ltd. All rights reserved.Article Citation - WoS: 49Citation - Scopus: 51Multidetermination of Thiamine Hcl and Pyridoxine Hcl in Their Mixture Using Continuous Daubechies and Biorthogonal Wavelet Analysis(Elsevier Science Bv, 2003) Baleanu, D; Dinç, EA new graphical method based on the one-dimensional wavelet transform (WT) was proposed and tested on mixture of thiamine hydrochloride (THI) and pyridoxine hydrochloride (PYR) in the presence of strongly overlapping signals. We selected from the data of the UV-VIS absorption spectra a signal consisting of 1150 points corresponding to the concentration range 8-32 mg ml(-1) for each vitamin and we subjected it to Daubechies8 (DAUB8) and Biorthogonal6.8 (BIOR6.8) wavelet transforms. Since the peaks of the transformed signals were bigger than original ones a zero crossing method was applied to obtain the calibration graphs. In addition, the validity of Beer-Lambert law was assumed for the transformed signals. An appropriate scale setting was choosing to obtain an alternative calibration for each method. MATLAB 6.5 software was used for one-dimensional wavelet analysis and the basic concepts about wavelet method were given. The obtained results were successfully compared among each other as well as with those obtained by other literature methods. The method developed in this paper is rapid, easy to apply, not expensive and it is suitable for analyzing of the overlapping signals of compounds in their mixtures without any chemical pre-treatment. (C) 2002 Elsevier Science B.V. All rights reserved.Article Citation - WoS: 1650Citation - Scopus: 1877On Conformable Fractional Calculus(Elsevier Science Bv, 2015) Abdeljawad, ThabetRecently, the authors Khalil et al. (2014) introduced a new simple well-behaved definition of the fractional derivative called conformable fractional derivative. In this article we proceed on to develop the definitions there and set the basic concepts in this new simple interesting fractional calculus. The fractional versions of chain rule, exponential functions, Gronwall's inequality, integration by parts, Taylor power series expansions, Laplace transforms and linear differential systems are proposed and discussed. (C) 2014 Elsevier By. All rights reserved.Article Citation - WoS: 148Citation - Scopus: 155Cantor-Type Cylindrical-Coordinate Method for Differential Equations With Local Fractional Derivatives(Elsevier Science Bv, 2013) Srivastava, H. M.; He, Ji-Huan; Baleanu, Dumitru; Yang, Xiao-JunIn this Letter, we propose to use the Cantor-type cylindrical-coordinate method in order to investigate a family of local fractional differential operators on Cantor sets. Some testing examples are given to illustrate the capability of the proposed method for the heat-conduction equation on a Cantor set and the damped wave equation in fractal strings. It is seen to be a powerful tool to convert differential equations on Cantor sets from Cantorian-coordinate systems to Cantor-type cylindrical-coordinate systems. (c) 2013 Published by Elsevier B.V.Article Citation - WoS: 24Citation - Scopus: 26Sampled-Data Nonlinear Observer Design for Chaos Synchronization: a Lyapunov-Based Approach(Elsevier Science Bv, 2014) Mashhadi, Seyed Kamal-e-ddin Mousavi; Baleanu, Dumitru; Faieghi, Mohammadreza; Mousavi Mashhadi, Seyed Kamal-e-ddinThis paper considers sampled-data based chaos synchronization using observers in the presence of measurement noise for a large class of chaotic systems. We study discretized model of chaotic systems which are perturbed by white noise and employ Lyapunov-like theorems to come up with a simple yet effective observer design. For the choice of observer gain, a suboptimal criterion is obtained in terms of LMI. We present semiglobal as well as global results. The proposed scheme can also be extended for discrete-time chaotic systems. Numerical simulations have been carried out to verify the effectiveness of theoretical results. (C) 2013 Elsevier B.V. All rights reserved.Article Citation - WoS: 16Citation - Scopus: 18An Empirical Examination of the Generalized Fisher Effect Using Cross-Sectional Correlation Robust Tests for Panel Cointegration(Elsevier Science Bv, 2015) Yuksel, Aydin; Omay, Tolga; Yuksel, AsliThis study examines the generalized Fisher hypothesis as applied to common stocks by using the recently proposed second generation panel cointegration tests. Unlike their predecessors, these new tests assume the existence of cross-section dependence in the data. For the sample analyzed, we report that these new tests, but not their predecessors, provide strong support for the existence of cointegration between stock and goods prices. Moreover, further analysis cannot reject the hypothesis that the cointegration relation is linear. Finally, our Fisher coefficient estimates are in the range between 0.68 and 1.27 and give support to the generalized Fisher hypothesis. (C) 2014 Elsevier B.V. All rights reserved.Conference Object Citation - WoS: 300Citation - Scopus: 368Models, Solutions and Enabling Technologies in Humanitarian Logistics(Elsevier Science Bv, 2015) Ertem, Mustafa Alp; Ozdamar, LinetWe present a survey that focuses on the response and recovery planning phases of the disaster lifecycle. Related mathematical models developed in this area of research are classified in terms of vehicle/network representation structures and their functionality. The relationships between these characteristics and model size are discussed. The review provides details on goals, constraints, and structures of available mathematical models as well as solution methods. In this review, information systems applications in humanitarian logistics are also surveyed, since humanitarian logistics models and their solutions need to be integrated with information technology to enable their use in practice. (C) 2014 Elsevier B.V. All rights reserved.Article Citation - WoS: 32Citation - Scopus: 37Environmental Risk Assessment of Small Hydropower (Shp) Plants: a Case Study for Tefen Shp Plant on Filyos River(Elsevier Science Bv, 2014) Kucukali, SerhatA multi-criteria scoring tool is used to assess the environmental risk level of small hydropower plants on the basis of documented evidence, measured data, and on-site observations. The assessment is based on evaluating compliance with the standards of the European Bank for Reconstruction and Development (EBRD). The following environmental criteria are assessed: environmental flow, water quality, fish passage and protection, watershed protection, threatened and endangered species. I evaluated the Tefen hydropower plant, which has been in operation on the Filyos River in northwestern Turkey since 2011. The assessment showed that the plant failed all of the EBRD criteria. (C) 2013 International Energy Initiative. Published by Elsevier Inc. All rights reserved.