Öztürkoğlu, Ömer

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Profile URL
https://gcris.yasar.edu.tr/handle/123456789/12225
Name Variants
Job Title
Doç.Dr.
Email Address
Main Affiliation
01.01.06.02. İşletme Bölümü
Status
Current Staff
Website
ORCID ID
0000-0003-3937-6657
Scopus Author ID
55173968900
Turkish CoHE Profile ID
Google Scholar ID
wc9BozAAAAAJ
WoS Researcher ID
B-8480-2019
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omer.ozturkoglu.jpg (8.95 KB)

Sustainable Development Goals

NO POVERTY1
NO POVERTY
0
Research Products
ZERO HUNGER2
ZERO HUNGER
0
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GOOD HEALTH AND WELL-BEING3
GOOD HEALTH AND WELL-BEING
3
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QUALITY EDUCATION4
QUALITY EDUCATION
0
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GENDER EQUALITY5
GENDER EQUALITY
0
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CLEAN WATER AND SANITATION6
CLEAN WATER AND SANITATION
0
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AFFORDABLE AND CLEAN ENERGY7
AFFORDABLE AND CLEAN ENERGY
1
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DECENT WORK AND ECONOMIC GROWTH8
DECENT WORK AND ECONOMIC GROWTH
3
Research Products
INDUSTRY, INNOVATION AND INFRASTRUCTURE9
INDUSTRY, INNOVATION AND INFRASTRUCTURE
5
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REDUCED INEQUALITIES10
REDUCED INEQUALITIES
1
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SUSTAINABLE CITIES AND COMMUNITIES11
SUSTAINABLE CITIES AND COMMUNITIES
0
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RESPONSIBLE CONSUMPTION AND PRODUCTION12
RESPONSIBLE CONSUMPTION AND PRODUCTION
2
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CLIMATE ACTION13
CLIMATE ACTION
0
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LIFE BELOW WATER14
LIFE BELOW WATER
0
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LIFE ON LAND15
LIFE ON LAND
0
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PEACE, JUSTICE AND STRONG INSTITUTIONS16
PEACE, JUSTICE AND STRONG INSTITUTIONS
0
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PARTNERSHIPS FOR THE GOALS17
PARTNERSHIPS FOR THE GOALS
1
Research Products
Documents

23

Citations

270

h-index

9

Go to Scopus profile
Documents

19

Citations

234

Go to WoS profile
Scholarly Output

39

Articles

22

Views / Downloads

0/4

Supervised MSc Theses

7

Supervised PhD Theses

4

WoS Citation Count

179

Scopus Citation Count

265

Patents

0

Projects

2

WoS Citations per Publication

4.59

Scopus Citations per Publication

6.79

Open Access Source

13

Supervised Theses

11

JournalCount
Journal of Yasar University3
An International Journal of Optimization and Control: Theories & Applications (IJOCTA)2
Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi2
Advanced Sustainable Systems1
Alphanumeric Journal1
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Scholarly Output Search Results

Now showing 1 - 10 of 39
  • Thumbnail Image
    Conference Object
    Product Swapping and Transfer Sales between Suppliers in a Balanced Network
    (IEEE, 2013) Ikbal E. Dizbay; Orner Ozturkoglu; Dizbay, Ikbal E.; Ozturkoglu, Orner; M Ganzha; L Maciaszek; M Paprzycki
    In this paper we present a preliminary deterministic mathematical model of cooperative supply chain network of suppliers and customers. We consider horizontal cooperation among suppliers such that they can swap their orders to reduce their transportation cost and they can purchase products from each other to reduce their shortage cost. Hence the objective is to examine the potential swap and horizontal purchasing operations between suppliers under perfect information sharing. Assuming a balanced network in a single-period in which total capacity of suppliers is greater than or equal to the total demand of customers we conduct an empirical analysis for six suppliers and eight customers. The analysis suggests for many suppliers the benefits of order swapping and lateral purchasing.
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    Article
    The integrated network model of pipeline sea and road distribution of petroleum product
    (2016) Oyewale LAWAL; OMER OZTURKOGLU; Lawal, Oyewale; Ozturkoglu, Omer
    Nigeria ranks high among the community of oil producers both in the world. It is therefore paradoxical that Nigeria with such profile in Organization of Petroleum Exporting Countries (OPEC) statistics finds it difficult to optimize its supply distribution while spending so much money on transportation and distribution. This paper thus reviews the petroleum product supply and distribution systems in the country. Thus we develop a single period single product deterministic mathematical model to effectively distribute the product to the end user through the most effective channel to the interest of the economy of the country. In our model we first consider a perfect condition in the petroleum industry irrespective of the production crises and conflicts like pipeline vandalism communal instability. We then consider different scnearios that presumes several breakdown cases in pipeline connection to anaylze the survivability of the network of petroleum distribution.
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    Article
    Citation - WoS: 6
    Citation - Scopus: 8
    An Evaluation of Order-picking Tour Efficiency in Two-block Warehouses
    (OSCM FORUM, 2019) Omer Ozturkoglu; Deniz Hoser; Hoser, Deniz; Ozturkoglu, Omer
    This study investigates the effects of critical operational and strategical decisions in order-picking warehouses on order pickers' tour lengths. For this study one of the most-commonly applied layouts in practice called two-block layout with a central cross aisle was considered. A full factorial experimental design and multiple-comparisons (Bonferroni t-tests) were applied to statistically determine the significance of various levels of storage policies pick-list sizes warehouse shape ratios warehouse sizes and their all interactions on average tour length. The analysis showed that deeper storage areas were superior to wider areas in small- and medium-sized warehouses. Warehouse designs with a 1: 1 width-to-depth shape ratio offered the most robust layouts. Within-storage aisle policy significantly reduced order-picking tour length and generally outperformed other storage policies.
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    Article
    Identical parallel machine scheduling with nonlinear deterioration and multiple rate modifying activities
    (2017) OMER OZTURKOGLU; Ozturkoglu, Omer
    This study focuses on identical parallel machine scheduling of jobs with deteriorating processing times and rate-modifying activities. We consider nonlinearly increasing processing times of jobs based on their position assignment. Rate modifying activities (RMAs) are also considered to recover the increase in processing times of jobs due to deterioration. We also propose heuristics algorithms that rely on ant colony optimization and simulated annealing algorithms to solve the problem with multiple RMAs in a reasonable amount of time. Finally we show that ant colony optimization algorithm generates close optimal solutions and superior results than simulated annealing algorithm.
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    Article
    Citation - Scopus: 1
    New business model proposal in the digital age: sustainability-focused servitization
    (EMERALD GROUP PUBLISHING LTD, 2025) Yucel Ozturkoglu; Omer Ozturkoglu; Elif Danisman; Ozturkoglu, Yucel; Danisman, Elif; Ozturkoglu, Omer
    PurposeWith the pressure of global markets and demanding customers most production companies are moving from pure production to the integration of products and services. This new formation is known as servitization and can give companies a strong competitive advantage. The recent studies in the literature propose that servitization has a positive impact on sustainability by improved energy consumption. However they also underscored the need for better implementation of sustainability and the barriers avoiding sustainable servitization behavior. This research aims to investigate sustainability-oriented servitization barriers which have not taken any attention by previous research and their relationships for successful implementations.Design/methodology/approachWe extracted fifteen servitization barriers from the literature and a focus group study. Then we presented their relationship with sustainable dimensions such as human business economic and market and environment. Using the selected experts' assessments we implemented Fuzzy-TISM to analyze the causal relationship among the barriers. We also implemented Fuzzy-MICMAC analysis to categorize the barriers.FindingsThe findings presented that lack of understanding of customer cultural problems high market risk financial constraints lack of environmental awareness and lack of environmental regulations are independent variables and play a very critical role in the success of sustainable-servitization implementations. Finally we proposed several managerial insights and a structured hierarchical model that can be used as a guide by practitioners to develop a better strategy for their implementations.Originality/valueTo the best of our knowledge a detailed examination of the barriers and challenges in the triple bottom line approach is already missing at the desired level. From this point of view this study is the first research that determines barriers of servitization based on the triple-bottom-line model with a sustainability perspective.
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    Master Thesis
    The Distribution Network Model of Pteroleum Product - Nigerian Dowstream Sector as a Case Study
    (2013) Lawal, Oyewale; Öztürkoğlu, Ömer
    Nijerya hem dünyada hem de Afrika?da büyük petrol üreticileri arasında yer almaktadır. Petrol İhraç Eden Ülkeler Örgütü (OPEC)?nün istatistiklerine ve bu topluluk içerisindeki yerine rağmen, Nijerya?nın sürekli olarak benzin yokluğu çekmesi ve tedarik ağını en iyi şekilde oluşturamaması paradoksal bir durum oluşturmaktadır. Böylece, bu tez ülke ekonomisine katkı sağlamak amacıyla petrol ürünlerinin son kullanıcılara etkin kanallar yoluyla en etkin bir şekilde dağıtımını sağlayacak bir model oluşturarak ülkede yaşanılan yoksunluğu incelemek ve bu konuya katkıda bulunmayı amaçlamaktadır. Böylece, bu çalışmada nihai kullanıcılara kadar olan taşıma maliyetlerini düşürmek için tedarikçi ülkelerden eyaletlerde bulunan son kullanıcılara kadarki ağı analiz etmekteyiz. Modelimizde yağmacılık, yıkıcılık, kötü yönetim, altyapıda yaşanılan sıkıntılar gibi üretim krizlerine ve çatışmalarına neden olan unsurları gözönünde bulundurmayıp, mükemmel durum altında modelimizi geliştirdik.En son olarak, Nijerya petrol endüstrisine ait toplanan veriler ile modelimizi çalıştırdık ve sonuçlar gösterdi ki bazı boru hatları en iyi dağıtım yapısında etkin bir şekilde kullanılmamakta, ama ağın bazı bölgelerinde ortaya çıkabilecek bozulmalara karşı dağıtım ağını destekleyici önemli bir rol üstlenmektedir.
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    Article
    Citation - WoS: 6
    Citation - Scopus: 10
    Evaluating Chevron aisle design in unit load warehouses with multiple pickup and deposit points
    (GAZI UNIV FAC ENGINEERING ARCHITECTURE, 2018) Omer Ozturkoglu; Yeliz Kocaman; Sevkinaz Gumusoglu; Kocaman, Yeliz; Ozturkoglu, Omer; Gümüşoğlu, Şevkinaz
    Warehousing is becoming more important in the supply chain management than before because of increasing competitiveness in market. Efficient warehouse management has become a critical factor that affects customer satisfaction. Especially managing the lead-time in a warehouse for preparation of a customer order has become one of the critical issues for warehouse managers. Order delivery time in a warehouse is affected by all warehouse activities such as unloading trucks storing and picking products packaging and shipping. The most critical activities are storing and picking because they are the most time consuming activities. Travel time for storing and picking activities depends on aisle layout of the warehouse. Therefore aisle design in a warehouse becomes a research field for researchers. In this study the effect of multiple P&D point on the performance of Chevron design under various warehouse sizes and under different material flow policies is investigated. A mathematical model is constructed in continuous warehouse space and then the expected travel time in a discrete warehouse is calculated. As a result Chevron design outperforms the equivalent traditional design when there are a few number of P&D points and central P&D points have higher material flows than others in warehouse that have 3/1 width/height shape ratio.
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    Article
    Citation - WoS: 1
    Citation - Scopus: 1
    Factors affecting recommended childhood vaccine demand
    (IOS PRESS, 2022) Ikbal Ece Dizbay; Omer Ozturkoglu; Dizbay, İkbal Ece; Öztürkoǧlu, Ömer
    Reaching a high vaccination coverage level is of vital essence when preventing epidemic diseases. For mandatory vaccines the demand can be forecasted using some demographics such as birth rates or populations between certain ages. However it has been difficult to forecast non-mandatory vaccine demands because of vaccine hesitation alongside other factors such as social norms literacy rate or healthcare infrastructure. Consequently the purpose of this study is to explore the predominant factors that affect the non-mandatory vaccine demand focusing on the recommended childhood vaccines which are usually excluded from national immunization programs. For this study fifty-nine factors were determined and categorized as system-oriented and human-oriented factors. After a focus group study conducted with ten experts seven system-oriented and eight human-oriented factors were determined. To reveal the cause and effect relationship between factors one of the multi-criteria decision-making methods called Fuzzy-DEMATEL was implemented. The results of the analysis showed that Immunization-related beliefs Media/social media contents/messaging and Social cultural religious norms have a strong influence on non-mandatory childhood vaccine demand. Furthermore whereas Availability and access to health care facilities and Political/ financial support to health systems are identified as cause group factors Quality of vaccine and service delivery management is considered an effect group factor. Lastly a guide was generated for decision-makers to help their forecasting process of non-mandatory vaccine demands to avoid vaccine waste or shortage.
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    Doctoral Thesis
    Factors Affecting International Students’ Study Destination
    (2022) Lawal, Oyewale Dhıkrulah; Öztürkoğlu, Ömer
    Factors affecting international students in making their choice of destination are critical indicators that actors in the educational industries find so critical to explore and understand. This study underwent a comprehensive and multi-methodological approach to understanding these critical factors. As countries have started the utilization of international education as another source of soft power, the government is looking for the best strategy to position themselves in a way to attract international students. This has prompted the need in optimizing the best approach of using these factors by the actors to employ in fulfilling their organizational objectives. To examine the factors that affect international students' study destinations, this study comprises three different studies with different objectives and methodologies in order to understand these factors. The methodologies employed are qualitative analysis (interview approach), quantitative analysis (questionnaire approach), and experts' analysis (using the Fuzzy-DEMATEL approach). An emerging factor was discovered in the interview method with factors in literature used for the quantitative analysis. 64 items were used to design a questionnaire that was administered to 788 international students and presented 8 component factors regarding the factors influencing international students' destinations. The results after considering international students' and experts' opinions, presented sets of important factors that should be focused on by the policymaker for their marketing strategies. It also shows that University ranking is the most significant while the Attractiveness of the campus and facilities within it is the least significant factor in the experts' opinion. The strength of the relationship of each pair of factors was also classified as 'very strong', 'strong' and 'medium' relationships which constitute the strategy map was also highlighted. The map serves as the ideal tool for policymakers to know how to best strategize to achieve their institution objectives after understanding their own competitive potentials.
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    Article
    Aşı Tedarik Zinciri Süreçleri: Karşılaşılan Sorunlar ve Dijital Çözümler
    (2021) OMER OZTURKOGLU; IKBAL ECE DIZBAY; Ozturkoglu, Omer; Dızbay, Ikbal Ece
    Salgın hastalıkların yayılımını engelleme yöntemlerinin en önemlilerinden biri aşılama yöntemidir. Aşılama yöntemi kullanılarak salgın hastalıkların tamamen yok edilmesimümkün olabilmektedir.Ancak hastalık veya salgınların önüne geçebilmesi için aşıların tedarik zinciri aşamalarından herhangi birinde soğuk zincirin bozulmaması ve uygun koşullarda işlem yapılmasıgerekmektedir. Aşı tedarik zincirlerinde uygun koşullarsağlanamadığı takdirde bağışıklık oranlarıdüşmekte aşı fireleri çevresel atıklar ve bağışıklama maliyetleri artmaktadır. Bu çalışmada aşı tedarik zinciri aşamalarıanaliz edilmiştir. Literatür taraması iletedarik zinciri aşamalarının etkin yönetilmesi için verilmesi gereken kararlar ve Endüstri 4.0 kapsamında kullanılabilecek teknolojik gelişmeler incelenmiştir.