Browsing Faculty of Engineering by OzU Authors "Duman, Ekrem"
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Application of sequence-dependent traveling salesman problem in printed circuit board assembly
Alkaya, A. F.; Duman, Ekrem (IEEE, 2013-06)Optimization issues regarding the automated assembly of printed circuit boards attracted the interest of researchers for several decades. This is because even small gains in assembly time result in very important benefits ... -
Applying migrating birds optimization to credit card fraud detection
Elikucuk, I.; Duman, Ekrem (Springer Science+Business Media, 2013)We discuss how the Migrating Birds Optimization algorithm (MBO) is applied to statistical credit card fraud detection problem. MBO is a recently proposed metaheuristic algorithm which is inspired by the V flight formation ... -
Benchmarking regression algorithms for income prediction modeling
Kibekbaev, Azamat; Duman, Ekrem (Elsevier, 2016)This paper aims to predict incomes of customers for banks. In this large-scale income prediction benchmarking paper, we study the performance of various state-of-the-art regression algorithms (e.g. ordinary least squares ... -
Benchmarking regression algorithms for income prediction modeling
Kibekbaev, Azamat; Duman, Ekrem (IEEE, 2015)This paper aims to predict incomes of customers for banks. In this large-scale income prediction benchmarking paper, we study the performance of various state-of-the-art regression algorithms (e.g. ordinary least squares ... -
Classification of hundreds of classes: A case study in a bank internal control department
Duman, Ekrem (IOS Press, 2023)The main function of the internal control department of a bank is to inspect the banking operations to see if they are performed in accordance with the regulations and bank policies. To accomplish this, they pick up a ... -
Combining and solving sequence dependent traveling salesman and quadratic assignment problems in PCB assembly
Alkaya, A. F.; Duman, Ekrem (Elsevier, 2015-09-10)In this study we undertake the optimization of chip shooter component placement machines which became popular in assembling printed circuit boards (PCB) in recent years. A PCB is usually a rectangular plastic board on which ... -
Comparison of computational intelligence models on forecasting automated teller machine cash demands
Alkaya, A. F.; Gultekin, O. G.; Danaci, E.; Duman, Ekrem (Old City Publishing, 2020)We take up the problem of forecasting the amount of money to be withdrawn from automated teller machines (ATM). We compare the performances of eleven different algorithms from four different research areas on two different ... -
A cost-sensitive decision tree approach for fraud detection
Sahin, Y.; Bulkan, S.; Duman, Ekrem (Elsevier, 2013-11-01)With the developments in the information technology, fraud is spreading all over the world, resulting in huge financial losses. Though fraud prevention mechanisms such as CHIP&PIN are developed for credit card systems, ... -
Deep reinforcement learning approach for trading automation in the stock market
Kabbani, Taylan; Duman, Ekrem (IEEE, 2022)Deep Reinforcement Learning (DRL) algorithms can scale to previously intractable problems. The automation of profit generation in the stock market is possible using DRL, by combining the financial assets price 'prediction' ... -
Detecting credit card fraud by modified Fisher discriminant analysis
Mahmoudi, Nader; Duman, Ekrem (Elsevier, 01.04.2015)In parallel to the increase in the number of credit card transactions, the financial losses due to fraud have also increased. Thus, the popularity of credit card fraud detection has been increased both for academicians and ... -
Intelligent classification-based methods in customer profitability modeling
Ekinci, Y.; Duman, Ekrem (Springer International Publishing, 2015)The expected profits from customers are important informations for the companies in giving acquisition/retention decisions and developing different strategies for different customer segments. Most of these decisions can ... -
Migrating birds optimization: a new metaheuristic approach and its performance on quadratic assignment problem
Duman, Ekrem; Uysal, M.; Alkaya, A. F. (Elsevier, 2012-12-25)We propose a new nature inspired metaheuristic approach based on the V flight formation of the migrating birds which is proven to be an effective formation in energy saving. Its performance is tested on quadratic assignment ... -
A new application of the traveling salesman problem: The Turkish cashier problem
Duman, Ekrem (Ministry Communications & High Technologies Republic Azerbaijan, 2022)We define the problem of finding a route for the cashier that minimizes the cost of transportation as the Turkish Cashier Problem (TCP). It is a special case of the well-known traveling salesman problem. To solve the TCP, ... -
A novel and successful credit card fraud detection system Implemented in a Turkish Bank
Duman, Ekrem; Buyukkaya, A.; Elikucuk, I. (IEEE, 2013)We developed a credit card fraud detection solution for a major bank in Turkey. The study was completed in about three years and the developed system has been in use since February 2013. It had a great impact in the rule ... -
Optimal ATM replenishment policies under demand uncertainty
Ekinci, Y.; Serban, N.; Duman, Ekrem (Springer Nature, 2021-06)The use of Automated Teller Machines (ATMs) has become increasingly popular throughout the world due to the widespread adoption of electronic financial transactions and better access to financial services in many countries. ... -
Optimization of ATM cash replenishment with group-demand forecasts
Ekinci, Y.; Lu, J.-C.; Duman, Ekrem (Elsevier, 2015-05-01)In ATM cash replenishment banks want to use less resources (e.g., cash kept in ATMs, trucks for loading cash) for meeting fluctuated customer demands. Traditionally, forecasting procedures such as exponentially weighted ... -
Preface: 13th cologne-twente workshop on graphs and combinatorial optimization (CTW 2015)
Duman, Ekrem; Alkaya, A. F.; Pickl, S.; Faigle, U. (Elsevier, 2019-01-10)N/A -
Profit-based artificial neural network (ANN) trained by migrating birds optimization: a case study in credit card fraud detection
Zakaryazad, Ashkan; Duman, Ekrem; Kibekbaev, Azamat (World Academy of Science, Engineering and Technology, 2015)A typical classification technique ranks the instances in a data set according to the likelihood of belonging to one (positive) class. A credit card (CC) fraud detection model ranks the transactions in terms of probability ... -
A profit-driven Artificial Neural Network (ANN) with applications to fraud detection and direct marketing
Zakaryazad, Ashkan; Duman, Ekrem (Elsevier, 2016-01-26)The rapid growth in data capture and computational power has led to an increasing focus on data-driven research. So far, most of the research is focused on predictive modeling using statistical optimization, while profit ... -
Social media analytical CRM: a case study in a bank
Duman, Ekrem (IOS Press, 2023)The use of the social media (SM) has become more and more widespread during the last two decades, the companies started looking for insights for how they can improve their businesses using the information accumulating ...
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