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Recent Submissions

Comparison of Randomized Solutions for Constrained Vehicle Routing Problem Demirci, Ibrahim Ethem; Ozdemir, Saziye Ece; Yayla, Oğuz (2020-06-01) © 2020 IEEE.In this short paper, we study capacity constrained vehicle routing problem (CVRP) and its solution by randomized Monte Carlo methods. For solving CVRP we use some pseudorandom number generators commonly used in...
Kalman based neural network analysis with resampling methods for longitudinal aerodynamic coefficient estimation Millidere, Murat; Kurt, Huseyin Burak; Balli, Hakan; Uğur, Ömür (2020-01-01) © 2020, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.Accurateness of the approximated aerodynamic characteristics of an unstable aircraft is considerably significant in flight control s...
Modal analysis of elastic vibrations of incompressible materials based on a variational multiscale finite element method Codina, Ramon; Türk, Önder (null; 2019-10-04) In this study, we extend the standard modal analysis technique that is used to approximate vibration problems of elastic materials to incompressible elasticity. In modal analysis, the second order time derivative of the d...
Discontinuous Galerkin Methods for Convection Diffusion Equations with Random Coefficients Çiloğlu, Pelin; Yücel, Hamdullah (null; 2019-09-11) Partial differential equations (PDEs) with random input data is one of the most powerful tools to model oil and gas production as well as groundwater pollution control. However, the information available on the input dat...
Süperpikseller ve İmza Tabanlı Yöntemler Kullanarak Hiperspektral Hedef Tespiti Kütük, Mustafa; Koz, Alper; Alatan, Abdullah Aydın (2019-06-27) Spectral signature based methods which form the mainstream in hyperspectral target detection can be classified mainly in three categories as the methods using background modeling, subspace projection based methods, and hyb...
Uzun Ömürlülük Risk Analizi: Kredibilite Yaklaşımı Yıldırım Külekci, Bükre; Kestel, Sevtap Ayşe (2019-06-24)
Efficient GeMSS Based Ring Signature Scheme Demircioğlu, Murat; Akleylek, Sedat; Cenk, Murat (2019-06-18) The ring signature scheme has an important usage area of public key crypto-system. It can be used for e-voting,as well as leaking information without revealing identity within a group. However, mostof these syst...
Single-Family Houses Portfolio Optimization under Impact of Large Investors in Housing Markets Yılmaz, Bilgi; Korn, Ralf; Kestel, Sevtap Ayşe (null; 2019-06-14)
Hydro Inflow Forecasting and Virtual Power Plant Pricing in the Turkish Electricity market Çabuk, Sezer; Kestel, Sevtap Ayşe; Kalaycı, Erkan (2019-05-23) Hydro inflow forecasting with most accurate quantitative models is a very crucial subject for effective hydro optimization, virtual power plant pricing, volume risk management and weather derivatives pricing in the Turkish...
Open-TEE is No Longer Virtual: Towards Software-only Trusted Execution Environments Using White-box Cryptography BIÇAKCI, KEMAL; Ak, Ihsan Kagan; Ozdemir, Betul Askin; Gozutok, Mesut (2019-01-01) Trusted Execution Environments (TEEs) provide hardware support to isolate the execution of sensitive operations on mobile phones for improved security. However, they are not always available to use for application develope...
Multi-objective Aggregate Production Planning Model Considering Overtime and Outsourcing Options Under Fuzzy Seasonal Demand Tirkolaee, Erfan Babaee; Goli, Alireza; Weber, Gerhard Wilhelm (2019-01-01) This paper investigates a novel fuzzy multi-objective multi-period Aggregate Production Planning (APP) problem under seasonal demand. As two of the main real-world assumptions, the options of workforce overtime and outsour...
Compact and Simple RLWE Based Key Encapsulation Mechanism Alkim, Erdem; Bilgin, Yusuf Alper; Cenk, Murat (2019-01-01) n this paper, we propose a key encapsulation scheme based on NewHope and Kyber, two NIST post-quantum standardization project candidates. Our scheme is based on NewHope, thus it is simple and has fast implementation while ...
On plateaued functions, linear structures and permutation polynomials Mesnager, Sihem; Kaytancı, Kübra; Özbudak, Ferruh (2019-01-01) We obtain concrete upper bounds on the algebraic immunity of a class of highly nonlinear plateaued functions without linear structures than the one was given recently in 2017, Cusick. Moreover, we extend Cusick’s class to ...
Ideal factorization method and its applications Kurt, Sibel; Yayla, Oğuz (2019-01-01) © Springer Nature Switzerland AG 2019.In this work the unsolvability of certain equations is studied in the case of cyclotomic number fields whose ring of integers is not a principal ideal domain. Winterhof et al. consider...
An improved algorithm for iterative matrix-vector multiplications over finite fields Mangır, Ceyda; Cenk, Murat; Manguoğlu, Murat (2018-11-09) Cryptographic computations such as factoring integers and computing discrete logarithms over finite fields require solving a large system of linear equations. When dealing with such systems iterative approaches such as Wie...
Discontinuous Galerkin Methods for Unsteady Convection Diffusion Equation with Random Coefficients Çiloğlu, Pelin; Yücel, Hamdullah (null; 2018-10-21) Partial differential equations (PDEs) with random input data is one of the most powerful tools to model oil and gas production as well as groundwater pollution control. However, the information available on the input data ...
Analyzing Housing Market Dynamics using Linear and non-Parametric Models Yılmaz, Bilgi ; Yerlikaya Özkurt, Fatma ; Kestel, Ayşe Sevtap (2018-10-07) This paper analyzes the dynamic effect of macroeconomic indicators, such as financial and commodity market indicators on national housing markets. Furthermore, it does not only focus on the impact of the variables but also...
Approximation of excessive backlog probabilities of two parallel queues Ünlü, Kamil Demirberk; Sezer, Ali Devin (2018-07-25) Let X be the constrained random walk on Z 2 + with increments (1, 0), (−1, 0), (0, 1) and (0, −1) representing the lengths at service completion times of two queues with exponentially distributed interarrival and service t...
Speeding up Curve25519 using Toeplitz Matrix-vector Multiplication Taskin, Halil Kemal; Cenk, Murat (2018-01-24) This paper proposes a new multiplication algorithm over F-2(255)-19 where the de-facto standard Curve25519 [2] algorithm is based on. Our algorithm for the underlying finite field multiplication exploits the Toeplitz matri...
Iterative methods for tomography problems: implementation to a cross-well tomography problem Karadeniz, M. F.; Weber, Gerhard Wilhelm (2017-08-23) The velocity distribution between two boreholes is reconstructed by cross-well tomography, which is commonly used in geology. In this paper, iterative methods, Kaczmarz's algorithm, algebraic reconstruction technique (ART)...