Department of Industrial Engineering, Article

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Recent Submissions

Compound effect of closing the loop and servitization in supply chains
Alegoz, Mehmet; Karaer, Özgen (2024-04-01)
Companies generally strive to become more sustainable by changing their business models or their supply chain structures. In this study, we evaluate the two aspects together; i.e., the compound effect of adopting servitiza...
An airport gate reassignment problem with gate closures
Poyraz, Dursen Deniz; Azizoğlu, Meral (2024-03-01)
In this study, we consider an airport gate reassignment problem where an airport has assigned gates to aircraft, but then a disruption occurs at some of the gates. After the disruption, we need to reassign the aircraft to ...
Energy efficient scheduling of a two machine robotic cell producing multiple part types
Aydoğan, Çiya; Gürel, Sinan (2024-01-01)
This paper studies robot speed control decisions and the energy consumption objective in a cyclic robotic cell scheduling problem. The study considers a two-machine flow shop cell that produces multiple part types. A robot...
Population-based exploration in reinforcement learning through repulsive reward shaping using eligibility traces
Bal, Melis Ilayda; İyigün, Cem; Polat, Faruk; Aydın, Hüseyin (2024-01-01)
Efficient exploration plays a key role in accelerating the learning performance and sample efficiency of reinforcement learning tasks. In this paper we propose a framework that serves as a population-based repulsive reward...
Revealing third-order interactions through the integration of machine learning and entropy methods in genomic studies
İyigün, Cem; Aydın Son, Yeşim (2024-01-01)
BackgroundNon-linear relationships at the genotype level are essential in understanding the genetic interactions of complex disease traits. Genome-wide association Studies (GWAS) have revealed statistical association of th...
An analysis of ambulance location problem from an equity perspective
Akdogan, M. Altan; Bayındır, Zeynep Pelin; İyigün, Cem (2023-12-01)
In this paper, we study the Emergency Medical Services (EMS) vehicle location problem from an equity perspective. We construct several mathematical programming models using a set of objective functions and constraints comm...
Scheduling a dual gripper material handling robot with energy considerations
Gürel, Sinan; Gultekin, Hakan; Emiroglu, Nurdan (2023-04-01)
Robotic cells are serial production systems that consist of a number of machines and a material handling robot that transfers parts between the machines. Energy consumption of a robot during its move between two machines c...
Finding the Nondominated Set and Efficient Integer Vectors for a Class of Three-Objective Mixed-Integer Linear Programs
Ceyhan, Gokhan; Köksalan, Mustafa Murat; Lokman, Banu (2023-03-01)
We consider a class of three-objective mixed-integer linear programs (MILPs) where at least one of the objective functions takes only discrete values. These problems commonly occur in MILPs where one or more of the three o...
Finding an energy efficient path for plug-in electric vehicles with speed optimization and travel time restrictions
Erdoğan, Bilgenur; Tural, Mustafa Kemal; Atashi Khoei, Arsham (2023-02-01)
Transportation is one of the main factors when global total energy consumption is considered and is a significant contributor to emissions of harmful gases including carbon dioxide (CO2). Due to their lower tailpipe CO2 em...
Biobjective route planning of an unmanned air vehicle in continuous space
TEZCANER ÖZTÜRK, DİCLEHAN; Köksalan, Mustafa Murat (2023-02-01)
We consider the route planning problem of an unmanned air vehicle (UAV) in a continuous space that is monitored by radars. The UAV visits multiple targets and returns to the base. The routes are constructed considering the...
An exact solution method and a genetic algorithm-based approach for the unit commitment problem in conventional power generation systems
Karabaş, Tolga; Meral, Fatma Sedef (2023-02-01)
The unit commitment problem (UCP) is one of the fundamental problems in power systems planning and operations that comprises two decisions: commitment and dispatching of conventional generating units. The objective is to m...
An integrated inventory and distribution planning problem for the blood products: An application for the Turkish Red Crescent
Kurt, Atil; Azizoğlu, Meral; Çetinkaya, Ferda Can (2023-01-01)
This study considers an integrated inventory planning and distribution problem based on an applied case at the Turkish Red Crescent’s Central Anatolian Regional Blood Center. We define two echelons, the first echelon being...
An integrated inventory and distribution planning problem for the blood products: An application for the Turkish Red Crescent
Kurt, Atil; Azizoğlu, Meral; Çetinkaya, Ferda Can (2023-01-01)
This study considers an integrated inventory planning and distribution problem based on an applied case at the Turkish Red Crescent’s Central Anatolian Regional Blood Center. We define two echelons, the first echelon being...
A partial coverage hierarchical location allocation model for health services
Karasakal, Orhan; Karasakal, Esra; Toreyen, Ozgun (2023-01-01)
We consider a hierarchical maximal covering location problem (HMCLP) to locate health centres and hospitals so that the maximum demand is covered by two levels of services in a successively inclusive hierarchy. We extend t...
Crowd-aware Thresholded Loss for Object Detection in Wide Area Motion Imagery
Hatipoglu, Poyraz Umut; İyigün, Cem; KALKAN, SİNAN (2023-01-01)
Detecting objects in Wide Area Motion Imagery (WAMI), an essential task for many practical applications, is particularly challenging in crowded scenes, such as areas with heavy traffic, since pixel resolutions of objects a...
Capacity allocation in service systems with preferred delivery times and multiple customer classes
Boran, Melis; Çavdar, Bahar; Işık, Tuğçe (2023-01-01)
Motivated by operational problems in click-and-collect systems, such as curbside pickup programs, we study a joint admission control and capacity allocation problem. We consider systems where customers have preferred servi...
Biobjective UAV routing for a mission to visit multiple mobile targets
Karabay, Nail; Köksalan, Mustafa Murat; TEZCANER ÖZTÜRK, DİCLEHAN (2023-01-01)
We address the route planning problem of an unmanned air vehicle (UAV) that operates in a two-dimensional hostile terrain monitored with radars. In this terrain, there are a number of targets that are planned to be visited...
Robotic stochastic assembly line balancing
Şahin, Muhammet Ceyhan; Tural, Mustafa Kemal (2023-01-01)
To keep up with the Industry 4.0 technological revolution and get the upper hand over competitors, manufacturing companies replace human workers with robots in their assembly processes. A popular approach in the manufactur...
Public R &D project portfolio selection under expenditure uncertainty
Çağlar, Musa; Gürel, Sinan (2023-01-01)
We consider a project portfolio selection problem faced by research councils in project and call-based R &D grant programs. In such programs, typically, each applicant project receives a score value during specially-design...
Arc routing based compact formulations for picker routing in single and two block parallel aisle warehouses
Saylam, Serhat; Çelik, Melih; Süral, Haldun (2023-01-01)
Order picking is the most expensive and labor-intensive warehouse activity. The objective of the order picking problem (OPP) is to collect the items on the pick list in a sequence that minimizes the total travel time. Whil...
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