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Graduate School of Applied Mathematics
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Disruption, panic buying, and pricing: A comprehensive game-theoretic exploration
Soltanzadeh, Shima; Rafiee, Majid; Weber, Gerhard Wilhelm (2024-05-01)
No one can cast a shadow on the disruption and customer buying behavior change, especially panic buying, as a result of it. Thus, designing scenarios to examine the influence of this situation on pricing decisions plays a ...
Location–allocation problem for green efficient two-stage vehicle-based logistics system: A type-2 neutrosophic multi-objective modeling approach
Das, Soumen Kumar; Yu, Vincent F.; Roy, Sankar Kumar; Weber, Gerhard Wilhelm (2024-03-15)
In recent decades, global climate change has become one of the most critical environmental issues, leading to increased environmental and social concerns about the sustainability of logistics networks. This study proposes ...
A fast NTRU software implementation based on 5-way TMVP
Yaman Gökce, Neslihan; Gökce, Anıl Burak; Cenk, Murat (2024-03-01)
The fast and efficient operation of post-quantum cryptographic algorithms has become an important research topic, especially with the recent developments and the process of the PQC Standardization Project by NIST. Various ...
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 ...
SOME CONSTRUCTIONS OF MUTUALLY UNBIASED BASES OVER FINITE FIELDS
Elmas, Gökhan; Özkaya, Buket; Özbudak, Ferruh; Department of Cryptography (2024-2-26)
Mutually unbiased bases, as a mathematical concept, has important implications in quantum information theory where the information is encoded as linear combinations of vectors in Hilbert spaces instead of as arrays of digi...
Vine Copula Approach to Understand the Financial Dependence of the Istanbul Stock Exchange Index
Evkaya, Ömer Ozan; Gür, Ismail; Yıldırım Külekci, Bükre; Poyraz, Gülden (2024-02-01)
Recently, the complex dependence patterns among various stocks gained more importance. Measuring the dependency structure is critical for investors to manage their portfolio risks. Since the global financial crisis, resear...
Complete Characterization of a Class of Permutation Trinomial in Characteristic Five
Grassl, Markus; Özbudak, Ferruh; Özkaya, Buket; Gülmez Temür, Burcu (2024-02-01)
In this paper, we address an open problem posed by Bai and Xia in [2]. We study polynomials of the form f (x) = x4q+1 + λ1 x5q + λ2 x q+4 over the finite field F5k , which are not quasi- multiplicative equivalent to any of...
Proba: privacy-preserving, robust and accessible blockchain-powered helios
Kocaman, Sermin; Doğanaksoy, Ali; Sulak, Fatih; Department of Cryptography (2024-1-26)
Helios is the first web-based and open-audit voting system. The open-audit feature allows anyone to track the voting process, thus providing easy verifiability in all stages of the elections. Despite many advantages, Helio...
VERIFIABLE ACCOUNTABLE SUBGROUP MULTI-SIGNATURES
Ağırtaş, Ahmet Ramazan; Yayla, Oğuz; Department of Cryptography (2024-1-22)
In this thesis, we introduce an accountable subgroup multi-signature (ASM) framework. The framework comprises three novel pairing-based ASM schemes, i.e., vASM, ASMwSA and ASMwCA, each designed to be secure against chosen-...
The Impact of Renewable Energy Incentives on Carbon Prices in the USA
ÇOŞKUN, ESİN HİLAL; Kestel, Sevtap Ayşe; DALKIR, SERDAR (Springer, 2024-01-01)
PEER GROUP SITUATIONS AND GAMES WITH FUZZY UNCERTAINTY
Özcan, İsmail; ALPARSLAN GÖK, Sırma Zeynep; Weber, Gerhard Wilhelm (2024-01-01)
The social arrangement of organizations determines the potential possibilities of all group of agents in several economic and Operations Research (OR) situations. In this paper, a class of cooperative games in which agents...
Contingent Convertible Bonds and An Analysis About Their Pricing
GOKCAN, OZGE; Gaygısız Lajunen, Esma; Department of Financial Mathematics (2024-1)
This study aims to study contingent convertibles, exploring their elements, trigger mechanisms, and the complex relation between financial variables that influence their valuation. By examining various pricing methodologie...
Improved Spectral Bound for Quasi-Cyclic Codes
Luo, Gaojun; Ezerman, Martianus Frederic; Ling, San; Özkaya, Buket (2024-01-01)
Spectral bounds form a powerful tool to estimate the minimum distances of quasi-cyclic codes. They generalize the defining set bounds of cyclic codes to those of quasi-cyclic codes. Based on the eigenvalues of quasi-cyclic...
A STRATEGY BASED ON STATISTICAL MODELLING AND MULTI-OBJECTIVE OPTIMIZATION TO DESIGN A DISHWASHER CLEANING CYCLE
ANAPA, KORKUT; Yücel, Hamdullah; Bayraktar, Songül; Department of Scientific Computing (2023-12-22)
This thesis proposes a novel approach based on statistical learning and multi-objective optimization to reduce the need for experiments during the design phase of new cleaning cycles for household dishwashers. First, regre...
MULTIPLE CONNECTIVITY APPROACH TO NETWORK FORMATION GAMES
Çam, Can Deniz; Gaygısız Lajunen, Esma; Yücel, Hamdullah; Department of Scientific Computing (2023-12-11)
The analyses of network structures, formations and stability characteristics are gaining importance and attracting increasing attention. This thesis establishes a specific network formation game and suggests a network stab...
Methods for Masking CRYSTALS-Kyber Against Side-Channel Attacks
ÖZEREN, SILA; Yayla, Oğuz (2023-12-11)
Stop-loss reinsurance pricing and exposure curves under jump influence
Mert, Özenç Murat; Kestel, Sevtap Ayşe (2023-12-07)
ANALYSIS OF TWO VERSATILE MPC FRAMEWORKS MP-SPDZ AND MPYC
Aykurt, Fatih; Yayla, Oğuz; Department of Cryptography (2023-12-07)
Using secure multi-party computing protocols (MPC), a group of participants who distrust one another can securely compute any function of their shared secret inputs. Participants exchange these inputs in a manner similar t...
Direct and inverse problems for a 2D heat equation with a Dirichlet–Neumann–Wentzell boundary condition
Ismailov, Mansur I.; Türk, Önder (2023-12-01)
In this paper we present the inverse problem of determining a time dependent heat source in a two-dimensional heat equation accompanied with Dirichlet–Neumann–Wentzell boundary conditions. The model is of significant pract...
On the information content of implied liquidity measure: Evidence from the S&P 500 index options
Yerli, Cigdem; Eksi-Altay, Zehra; Kestel, Sevtap Ayşe (2023-11-01)
This paper aims to unfold the information content of the implied liquidity measure, which is introduced through the Conic Finance theory and considered a proxy for the market liquidity level. We propose a partial informati...
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