Erişime Açık

Project staff scheduling with theory of coalition

Oğuzhan Ahmet ARIK | Erkan KÖSE

Project scheduling has been still one of the hottest topics in the management area. The goal of traditional project management is to complete the project at the earliest possible time in accordance with the available resources without violating priority relations of the activities involved. Unlike traditional project management, this study deals with the possibility of a coalition among the staf available to accomplish tasks of the project. The tasks can be fulflled by more than one staf members. Staf’s coalition shortens the completion time of the tasks. A natural problem that arises in this ...Daha fazlası

Makale/Derleme 2019 GROUP DECISION AND NEGOTIATION 12 Görüntülenme

Erişime Açık

Locating unmanned aircraft systems for multiple missions under different weather conditions

Erkan KÖSE

Motivated by the increasing civilian use of Unmanned Aerial Vehicles (UAVs), this paper considers the simultaneous location and routing of UAVs for multiple missions and diferent weather conditions. We include modeling and computational experience inspired by requirements for air surveillance by the Turkish government’s public agencies. We model these demands in multiple mission areas and consider the impact of diferent weather conditions on the ability to employ UAVs from diferent geographic locations. We formulate the problem as a two-stage stochastic integer linear program with recourse and ...Daha fazlası

Makale/Derleme 2019 Operational Research 5 Görüntülenme

Mixed integer programming approach for seasonal anomalies in stock markets: A case study for BIST

Oğuzhan Ahmet ARIK

This paper proposes a mixed integer programming approach for seasonal anomalies in stock markets and presents a case study for the XU030 index in the stock market of Istanbul Stock Exchange (BIST). Stock markets are significant for economies of countries all over the world. Investors get economical wealth or lose some of their investment by selling and buying stocks. Therefore, buying and selling times of stocks are so important. This paper investigates a well-known effect called as ‘Sell in May and Go Away’ by proposing a MIP approach that searches best times for buying and selling of stocks ...Daha fazlası

Makale/Derleme 2018 New Trends and Issues Proceedings on Humanities and Social Sciences 3 Görüntülenme

Çok atamalı-kapasitesiz p-adü medyan probleminin yapay arı kolonisi algoritmasıyla çözümü

Betül YILDIRIM

Bildiri

Bildiri 2019 39. Yöneylem Araştırması ve Endüstri Mühendisliği Kongresi, Başkent Üniversitesi/Ankara ( Optimization ) , pp. 8 - 81 11 Görüntülenme

İki aşamalı tedarik zinciri koordinasyonunun bulanık talep altında analizi

Gülçin CANBULUT

Çalışmada; bir tedarikçi ve bir perakendeciden oluşan iki aşamalı bir tedarik zinciri yapısı talep değişkeninin bulanık parametre olması durumunda incelenmiştir. Tedarik zinciri üyelerinin her birinin farklı hedefleri bulunmakta ve kendi performanslarını optimum yapmayı istemektedirler. Bu sebeple tedarik zinciri üyeleri arasındaki koordinasyonun sağlanması gerekmektedir. Bu koordinasyona göre tedarik zincirleri; merkezi ve merkezkaç tedarik zincirleri olarak değerlendirilmektedir. Çalışmada merkezi ve merkezkaç tedarik zinciri modelleri için talep parametresinin bulanık değişken olması şartıy ...Daha fazlası

Makale/Derleme 2019 JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY 8 Görüntülenme

Performance Evaluation of a Two-stage Supply Chain Under Fuzzy Environment

Gülçin CANBULUT

In this paper, performance evaluation of a two-stage supply chain which consists of a supplier and a retailer under uncertainty environment is examined. In the literature; many studies have been investigated on supply chain performance analysis in uncertainty environment and demand parameter is an essential data on these analyses. When there is sufficient data about demand, it is easy to construct probability distribution of demand. However, in the absence of enough historical data, it is impossible to construct the probability distribution. The demand parameter is intuitively determined and s ...Daha fazlası

Makale/Derleme 2018 JOURNAL OF MULTIPLE-VALUED LOGIC AND SOFT COMPUTING 6 Görüntülenme

Fuzzy parallel machine scheduling problem under fuzzy job deterioration and learning effects with fuzzy processing times

Oğuzhan Ahmet ARIK

This chapter presents a mixed integer non-linear programming (MINLP) model for a fuzzy parallel machine scheduling problem under fuzzy job deterioration and learning effects with fuzzy processing times in order to minimize fuzzy makespan. The uncertainty of parameters such as learning/deterioration effects and processing times in a scheduling problem makes the solution of the problem uncertain. Fuzzy sets can be used to encode uncertainty in parameters. In this chapter, possibilistic distributions of fuzzy parameters and possibilistic linear programming approaches are used in order to create a ...Daha fazlası

Kitap Bölümü 2018 Advanced Fuzzy Logic Approaches in Engineering Science , pp. 4 - 67 19 Görüntülenme

The most livable city selection in Turkey with the grey relational analysis

Erkan KÖSE | Gülçin CANBULUT

Purpose – This study has two main objectives: (1) to expand the application areas of grey system theory and (2) to select the most livable city in Turkey. Design/methodology/approach – Choosing the most livable city is a complex problem that requires many criteria to be considered. It is important to select decision points according to which the criteria selection will be made and to what extent the criteria will affect the evaluation. For this purpose, a questionnaire was prepared to determine the criteria to be used in the assessment. The survey results were evaluated by the factor analysis ...Daha fazlası

Makale/Derleme 2020 Grey Systems: Theory and Application 5 Görüntülenme

Goal programming approach for carrying people with physical disadvantages

Oğuzhan Ahmet ARIK | Erkan KÖSE | Gülçin CANBULUT

Most of today's optimization efforts aim to reduce costs, time or the number of resources used. However, optimization efforts should consider other factors as important as these, such as facilitating the lives of the disabled, elderly and pregnant and helping them in their daily lives. In this study, the Nuh Naci Yazgan (NNY) University (Kayseri/Turkey) personnel transport problems were discussed. The NNY University provides a shuttle service to bring employees to school at the start of the work and to leave them at home after work. In order to shorten the collection / distribution time and th ...Daha fazlası

Makale/Derleme 2020 Promet - Trafic&Transportation 7 Görüntülenme

Single machine earliness/tardiness scheduling problem with grey processing times and the grey common due date

Oğuzhan Ahmet ARIK

Purpose – This paper presents a mixed-integer programming model for a single machine earliness/tardiness scheduling problem where the objective is to minimize total earliness/tardiness duration when the uncertainty of parameters such as processing times and due date is coded with grey numbers. Design/methodology/approach – Grey theory and grey numbers are used for illustrating the uncertainty of parameters in processing times and common due date, where the objective is to minimize the total earliness/ tardiness duration. The paper proposes a 0–1 mathematical model for the problem and an effect ...Daha fazlası

Makale/Derleme 2020 Grey Systems: Theory and Applications 11 Görüntülenme

Reliable covering problem for emergency services vehicles: An application for Kayseri province

Betül YILDIRIM

Bildiri

Bildiri 2020 International Conference on Access to Recent Advences in Engineering and Digitalization , pp. 1 - 1 12 Görüntülenme

Solving p-hub median problem via artificial bee colony algorithm considering different search strategies

Betül YILDIRIM

Bildiri

Bildiri 2019 International Conference on Human-Computer Interaction, Optimization and Robotic Applications , pp. 1 - 1 2 Görüntülenme

Detaylı Arama

Filtreler

Koleksiyon [20]

İlgili Araştırmacılar [6]

Tam Metin [2]

Tür [4]

Yazar [6]

Alt Tür [2]

Alt Tür 1 [2]

Konu Başlıkları [19]

Bilimsel Araştırma Etkinlikleri [1]

Açık Erişim Tarihi [5]

Tarih [6]

Dizin Platformu [5]

İsmi Geçen [3]

WOS Kategorileri [4]

Projeler [1]

Oğuzhan Ahmet ARIK | Erkan KÖSE

Erkan KÖSE

Oğuzhan Ahmet ARIK

Betül YILDIRIM

Gülçin CANBULUT

Gülçin CANBULUT

Oğuzhan Ahmet ARIK

Erkan KÖSE | Gülçin CANBULUT

Oğuzhan Ahmet ARIK | Erkan KÖSE | Gülçin CANBULUT

Oğuzhan Ahmet ARIK

Betül YILDIRIM

Betül YILDIRIM