Ömür Uğur

E-mail

ougur@metu.edu.tr

Department

Graduate School of Applied Mathematics

ORCID

0000-0001-9348-7775

Scopus Author ID

23994756900

Web of Science Researcher ID

D-2361-2013

A stabilized finite element formulation with shock-capturing for solving advection-dominated convection–diffusion equations having time-fractional derivatives Cengizci, Süleyman; Uğur, Ömür; Natesan, Srinivasan (2024-03-01) Numerical instabilities arising when simulating transport phenomena dominated by convection processes are among the most challenging situations in computational science, demanding the use of non-classical formulations and ...
Hybrid wavelet-neural network models for time series Kılıç, Deniz Kenan; Uğur, Ömür (2023-09-01) The use of wavelet analysis contributes to better modeling for financial time series in the sense of both frequency and time. In this study, S&P500 and NASDAQ data are separated into several components utilizing multiresol...
A SUPG formulation augmented with shock-capturing for solving convection-dominated reaction–convection–diffusion equations Cengizci, Süleyman; Uğur, Ömür; Natesan, Srinivasan (2023-07-01) In this computational study, stabilized finite element solutions of convection-dominated stationary and linear reaction–convection–diffusion equations are studied. Although the standard (Bubnov–) Galerkin finite element me...
A stabilized FEM formulation with discontinuity-capturing for solving Burgers’-type equations at high Reynolds numbers Cengizci, Süleyman; Uğur, Ömür (2023-04-01) This computational study is concerned with the numerical solutions of Burgers’-type equations at high Reynolds numbers. The high Reynolds numbers drive the nonlinearity to play an essential role and the equations to become...
The Impact of Feature Selection and Transformation on Machine Learning Methods in Determining the Credit Scoring Koç, Oğuz; Uğur, Ömür; Kestel, Sevtap Ayşe (2023-03-01) Banks utilize credit scoring as an important indicator of financial strength and eligibility for credit. Scoring models aim to assign statistical odds or probabilities for predicting if there is a risk of nonpayment in r...
SUPG formulation augmented with YZ beta shock-capturing for computing shallow-water equations Cengizci, Suleyman; Uğur, Ömür (2023-02-01) We demonstrate that the streamline-upwind/Petrov-Galerkin (SUPG) formulation enhanced with YZ beta discontinuity-capturing, that is, the SUPG-YZ beta formulation, is an efficient and robust method for computing 2D shallow-...
Optimal placement of the multiple magnetic sources for the MHD flow in a rectangular duct Evcin, Cansu; Uğur, Ömür; Tezer, Münevver (2023-01-01) In this paper, we consider the optimal control of the fully developed, steady, laminar, unidirectional flow of an incompressible electrically conducting fluid in a long channel of rectangular cross-section (duct). The magn...
SUPG-YZ beta computation of chemically reactive convection-dominated nonlinear models Cengizci, Suleyman; Uğur, Ömür; Natesan, Srinivasan (2022-09-01) In this computational study, we deal with the stabilized finite element solutions of convection-dominated models having nonlinear reaction mechanisms. The existence of advection terms in these models causes the numerical s...
Numerical Modeling of Hypersonic Air and Carbon Dioxide Flows in Thermochemical Non-Equilibrium with SU2-NEMO Solver Çelik, Mutlu; Uğur, Ömür; Eyi, Sinan (2022-06-23) Modeling of hypersonic aerothermodynamics in non-equilibrium flow is a challenging problem of aircraft design. Especially, prediction of atmospheric reentry and other planet’s entry heat loads are significant for aerospace...
Optimal Limit Order Book Trading Strategies with Stochastic Volatility in the Underlying Asset Aydoğan, Burcu; Uğur, Ömür; Aksoy, Ümit (2022-1-01) In quantitative finance, there have been numerous new aspects and developments related with the stochastic control and optimization problems which handle the controlled variables of performing the behavior of a dynamical s...

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