Endüstri Mühendisliği Bölümüne ait bildiri ve sunumlar bu koleksiyonda listelenir. https://hdl.handle.net/20.500.12294/468 2026-05-04T07:37:54Z 2026-05-04T07:37:54Z Güney, Evren Ercan, Sami Çakır, Volkan Düzdar, İrem https://hdl.handle.net/20.500.12294/2076 2022-10-03T18:45:11Z 2013-01-01T00:00:00Z

A mathematical model and solution techniques for the influential selection problem Güney, Evren; Ercan, Sami; Çakır, Volkan; Düzdar, İrem In the era of social networks, many companies shift their marketing campaigns to this new media. Any person who influences his/her connections is called an influential. Since companies have limited budgets for advertising, they have to correctly select the influentials, which will forward their message to their connections over the online social network. In this study, the problem of selecting the best influentials regarding different objectives and constraints are modeled. The influential selection problem can be modeled similar to the famous set covering problem. We propose a binary integer programming formulation to represent the influential selection problem. We propose various different solution techniques to obtain close-to-optimal solutions and carry out experimental analysis to determine the performance of the techniques proposed. Arena;Boeing;et al.;FedEx Ground;The Ergonomics Center of North Carolina;The Hershey Company; IIE Annual Conference and Expo 2013 -- 18 May 2013 through 22 May 2013 -- San Juan

2013-01-01T00:00:00Z Barut, Elif Ercan, Sami https://hdl.handle.net/20.500.12294/2071 2022-10-03T18:44:36Z 2013-01-01T00:00:00Z

Innovative Way of Obtaining Energy Barut, Elif; Ercan, Sami In big cities., many people use public tarnsportation 'ehicIcs especially,metrobuses. The purpose of this innovative study is to produce energy from those 4 million passengers. This designed system will produce electrical energy from the passcngerpeople's kinetic energy while they are passing through the tollhars. This innovative way of thougt may be used for other passing systems like metro,universities.stadiums and so on. The tollbar has been designed with an additional part which have dynamo,cogwheels, lamp.charge mach inc and multimeter. The constructed system will produce electricity and accumulate it. Later the accumulated electrical energy may be used whenever needed. International Institute of Informatics and Systemics (IIIS); 17th World Multi-Conference on Systemics, Cybernetics and Informatics, WMSCI 2013 -- 9 July 2013 through 12 July 2013 -- Orlando, FL

2013-01-01T00:00:00Z Güney, Evren Düzdar, İrem Çakır, Volkan Özdemir, Abdullah Şahin, Özge https://hdl.handle.net/20.500.12294/2054 2022-10-03T18:45:10Z 2014-01-01T00:00:00Z

An efficient variable neighbourhood search heuristic for the influential selection problem Güney, Evren; Düzdar, İrem; Çakır, Volkan; Özdemir, Abdullah; Şahin, Özge A online social network consists of individuals or entities which are tied by a certain type of interdependency such as collaboration, friendship or acquaintance. Due to the wide usage of internet, many companies actively use this new media in their marketing campaigns. Given an online social network, a person that influences his/her connections is called an influential. Since companies have limited budgets for advertising, they have to correctly select the influentials, which will forward their message to their connections over various online social networks and hope that a cascade will be triggered so that a maximum number of individuals are reached. In most of the previous studies the social networks are modeled as stochastic fields where the cascading process is represented by linear threshold or independent cascade models. It is shown that determining the top-k influential nodes within the network under this setting is NP-hard and a greedy based heuristic provides a provable approximation guarantee. Following these initial efforts many researchers worked on the improvement of the efficiency of the greedy algorithm without focusing on the solution quality. In this study, the problem of selecting the best k-influentials in social netrowk is studied from the solution quality perspective and using a Variable Neighbourhood Serach(VNS) heuristic optimal solutions are sought. Experimental analysis on certain real-life data is carried out to determine the performance of the techniques proposed. 1st International Conference on Engineering and Applied Sciences Optimization, OPT-i 2014 -- 4 June 2014 through 6 June 2014 --

2014-01-01T00:00:00Z Karaca, Tolga Kudret Çakır, Volkan https://hdl.handle.net/20.500.12294/1969 2022-10-03T18:45:21Z 2017-01-01T00:00:00Z

Production process evaluation and improvement by using the method of discrete event simulation Karaca, Tolga Kudret; Çakır, Volkan The label printing and packaging industry has a rapidly growing and evolving market in the world. The most important aim of the companies is to accomplish the demand and expectations of the customers in the market. Label printing houses have to improve their production processes to produce fast and good quality products. In this paper, system performance was analyzed and remedial solutions were sought for a company, which is active under variable demand conditions. Aim of this study is identifying bottlenecks, balancing production lines and improving system efficiency by using simulation. A conceptual model was created including two main production lines and a discrete event simulation model was created at Arena software. After validation and verification steps scenario analysis were conducted and solutions for production problems and improvement suggestions were made to the management of the company. © 2017 EUROSIS-ETI. All rights reserved. #nofulltext# --- Çakır, Volkan (Arel Author), Karaca, Tolga Kudret (Arel Graduate Student); 31st Annual European Simulation and Modelling Conference, ESM 2017 -- 25 October 2017 through 27 October 2017 --

2017-01-01T00:00:00Z