Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Yucesan, Melih(3)
- Akan, Yaprak(1)
- Ağar, Salih(1)
- Bakır, Eda(1)
- Bayrak, Fatih(1)
- Furtana, Beyza(1)
- Gökkoruk, Ali(1)
- Işık, Erdem(1)
- Kök, Baha Vural(1)
- Mahmat, Aybars(1)
- Taşgın, Yahya(1)
- Tosun, Nihat(1)
- Türk, Zeynep(1)
- Uçar, Aynur(1)
- Yalçın, Erkut(1)
- Yılmaz, Mehmet(1)
- Çeviren, Seher Meral(1)
- Şenel, Bilgin(1)
- Şenel, Mine(1)
Yayınlar
- MakaleAçık Erişim2024Perceptions of and intentions to use value stream costing in lean manufacturing enterprises in turkey
Türk, Zeynep; Çeviren, Seher Meral
New methods such as value-stream costing (VSC) and management, which focuses on shortening production times and providing added value for the customer, have become necessary because of rapid developments in technology. The purpose of this study is to examine the intentions of lean companies in Turkey to apply VSC. Survey data analyzed with SPSS and AMOS show that the perceived ease of use for the individual has a significant effect on both the intention to apply VSC and the perception of usefulness for the individual while that for the organization affects the perception of usefulness for the organization.
- MakaleAçık Erişim2023AISI 52100 Rulman Çeliğinin Ultrasonik Tornalama Yöntemi ile Kesici Takım Ömrünün İncelenmesi
Tosun, Nihat; Mahmat, Aybars; Ağar, Salih
Bu çalışmada, AISI 52100 çeliğinin geleneksel ve ultrasonik tornalanmasında işlem parametrelerinin performans karakteristikleri üzerindeki etkileri yani AISI 52100 çeliğinin işlenebilirliği deneysel, sayısal ve istatistiksel olarak araştırıldı. Çalışmada, işlenebilirliğin tespit edilmesi amacıyla, bağımsız değişkenlerin takım ömrü üzerine olan etkileri belirlendi. Deneysel çalışmalar, 50, 100 ve 150 m/dak kesme hızları, 0.1 mm/devir sabit ilerleme ve 0.5 mm sabit talaş derinliği gibi işleme şartları altında, sementit karbür ve kübik bor nitrür (CBN) kesici takımlar kullanılarak yürütüldü. Ultrasonik tornalamada, kesici takıma iki farklı titreşim genliği (5 ve 10 µm) ve iki farklı titreşim frekansı (20 ve 30 kHz) uygulandı.
- MakaleAçık Erişim2021The Investigation of Production Errors and Remedies Arising from the Mold and Material Used in the Plastic Injection Production Line
Taşgın, Yahya; Gökkoruk, Ali
Plastic injection molding is widely used in all areas of the industry. The most important reason for this is that seamless plastic products in desired shapes and sizes can be easily produced with injection molds. Plastic products are exposed to many different parameters during molding. Therefore, it is aimed to create correct production methods by seeing the effect of molding parameters. The purpose of this study was to determine the fast and correct method and minimizing the errors by detecting the manufacturing defects that may occur during the production of materials with different properties with plastic injection machines beforehand. As a result of this study, the problems caused by the air remaining in the mold during the production phase, the problems caused by the turbulence that may occur during the flow of the liquid raw material, the problems that occur in the areas where the flow paths overlap, the reasons for product loss, especially in thin-section parts, the adhesion of the part to the female mold, the product with burr, as well as problems such as distortion and gaps were determined and solutions were provided.
AtıfOpenAlex2TR Dizin1
İncele - MakaleAçık Erişim2021Numerical Investigation of the Effect of Using Nanofluids on Thermal Performance in an Energy Storage Pipe
Bayrak, Fatih; Işık, Erdem; Uçar, Aynur; Bakır, Eda
Considering the advances in technology, new approaches and heatsinks with good thermal performance are needed to achieve the efficiency and reliability expected from high-efficiency electronic devices. In this numerical study, an aluminum pipe with the same hydraulic diameter, channel length and cross-section geometry was used. To increase the heat transfer rate of the system; Al2O3/water nanofluids with water, 1% and 2% concentrations were used in the pipe, and a 5mm thick RT25HC phase change material (PCM) was used on the outer surface of the pipe. The fluids passed through the aluminum pipe were analyzed using the ANSYS 20.2 package program at four different speeds and four different Reynolds numbers. According to the results obtained, the mass melting ratio and Nusselt number were calculated for each fluid. When the results obtained from the study were examined, it was seen that the best Nusselt and liquid fraction was Reynolds 1500 and 2% Al2O3/water. For all refrigerants, it was concluded that the mass melting rate of the refrigerants and the Nusselt number increased with the increase of the fluid velocity.
- MakaleAçık Erişim2020Mekanik tesisat projelerinde best worst ve nötrosofik ahp entegre modeliyle hata türü ve etkileri analizi
Yucesan, Melih
Hata türü ve etkileri analizi (FMEA), sistemlerdeki, tasarımlardaki, ürünlerdeki, projelerdeki veya projelerdeki güvenliği iyileştirmeyi, tanımlamayı, değerlendirmeyi ve en aza indirmeyi hedefleyen bir risk değerlendirme aracıdır. Risk önceliği numarası (RPN), FMEA bazlı risk değerlendirme uygulamaları için temel değerlendirme kriteridir. RPN'in oluşum (O), şiddeti (S) ve tespiti (D) gibi risk faktörlerine dayanarak uygun şekilde hesaplanmalıdır. Bununla birlikte, geleneksel RPN hesaplama yöntemi, risk faktörlerinin ağırlığını göz önünde bulundurmamak gibi birçok nedenden dolayı ağır biçimde eleştirilmiştir. Geleneksel FMEA yönteminin bu dezavantajının üstesinden gelmek için, bu makale, mekanik tesisat projeleri için Best Worst method (BWM) ve Nötrosofik analitik hiyerarşi süreci (NAHP) ile entegre modelini içeren FMEA modelini önermektedir. FMEA parametresi S, O ve D'nin ağırlıkları, BWM yöntemiyle hesaplanır ve bu da, tutarlı bir şekilde ikili karşılaştırma ve güvenilir sonuçlar sağlar. Daha sonra dokuz arıza modu, NAHP metodu ile S, O ve D parametreleri açısından değerlendirilir. Arıza modlarının risk önceliklerini belirlemek için risk öncelik endeksleri hesaplanır. Son olarak, belirlenen arıza modları için önleyici tedbirler önerilmiştir.
AtıfOpenAlex2İncele - MakaleYalnız künye2019Green Supplier selection for plastic industry using integrated model based on Pythagorean fuzzy AHP and fuzzy TOPSIS
Yucesan, Melih
Purpose –Supply Chain Management (SCM) has emerged in recent years and is now increasing in popularity. It aims to reduce production costs, maximize earnings, improve customer relations, improve inventory management and increase customer satisfaction. Reducing total cost of procurement is one of the most important parameters in aligning the objectives of partners in a supply network.Design/methodology/approach – This paper proposed Pythagorean Fuzzy Analytic Hierarchy Process (PFAHP) and Fuzzy Technique for Order Preference by Similarity to Ideal Solution (FTOPSIS) integrated model for green supplier selection for plastic industry. In the first phase of the study, the parameters to be used in selecting suppliers are determined. Then, by making pairwise comparisons, the weights of these parameters are determined with PFAHP method. Finally, the supplier that is most suitable for 3 suppliers is determined using the FTOPSIS method.Findings – Among the criteria evaluated by 5 experts, the most important criteria, the parameters of the Inspection methods and management and organizations are determined as the most important parameters respectively. The supplier no. 3 has been identified as the most suitable supplier.Discussion –The case study is performed under a fuzzy environment to reduce uncertainty and vagueness, and linguistic variables parameterized by interval-valued Pythagorean and triangular fuzzy numbers are used. Through the case study, 8 main and 45 sub-criteria supplier selection evaluation criteria used to assess 3 suppliers by FTOPSIS. However, our study has some disadvantages and possible further work is recommended. Other possible different fuzzy sets can be used in the projected method.
AtıfTR Dizin3İncele - MakaleYalnız künye2019The Comparison of the EVA Based Resin Modified Bituminous Mixtures to SBS Modification in Terms of Mechanical Properties
Yalçın, Erkut; Furtana, Beyza; Kök, Baha Vural; Yılmaz, Mehmet
The bituminous coating layers used in the flexible pavement are the top layer that is directly exposed to the effects of the traffic and the environment and therefore must be quite robust in terms of mechanical properties. The bituminous binder used in the mixture, is commonly modified with the Styrene-Butadiene-Styrene (SBS) polymer additive so that the bituminous hot mixtures can resist to the increased traffic load and number for a long time without deforming. The high demand for SBS makes it difficult to supply when necessary and therefore brings on the use of alternative additives. In this study, the effects of the use of Ethylene-Vinyl-Acetate (EVA) based resin (EBR) on the mechanical properties of bituminous mixtures were investigated and their performance was compared with SBS modification. Marshall stability and flow, indirect tensile strength, indirect tensile stiffness modulus, indirect tensile cycling loading and dynamic creep tests were applied to pure and modified mixtures. As a result, it was found that EBR modification had significantly better performance compared to pure mixtures and showed close performance to SBS modification.
AtıfTR Dizin3İncele - MakaleYalnız künye2017Çekyat ÜretimindeÖncelikli Hedef Programlama İle Bütünleşik Üretim Planlaması
Yucesan, Melih
Bu çalışmanın amacı, mobilya endüstrisinde çekyat üretimi yapan bir işletmenin bütünleşik üretim planlama faaliyetleri için öncelikli hedef programlama yaklaşımının kullanılabilirliğini göstermektir. Karar verici için iki farklı bütünleşik üretim planı önerisi yapılmıştır. Planlardan biri iki öncelikli hedef programlama modeli kullanılarak yapılan bütünleşik üretim planıdır. Birinci öncelik hedeflenen kar miktarıdır, ikinci öncelik ise hedeflenen üretim miktarı ve hat düzgünleştirmedir. Birinci ve ikinci planda aynı kar miktarı hedeflenmesine rağmen, ikinci planda iş istasyonlarının çalışma süreleri mümkün olduğunca yakın olması istenmiştir. Böylece iş istasyonlarının boşta bekleme süreleri azalacaktır. Yapılan bu çalışma sonucunda üretim planlama ve kontrol faaliyetlerinin işletme verimliliği üzerindeki önemi ortaya koyulmuştur. Önerilen üretim planı modeli esas alınarak gelecek dönemlerde, model üzerinde ürün sayısı, çeşidi ve planlama dönemi sayısı değiştirilerek farklı amaçlar doğrultusunda farklı sonuçlar elde edilebileceği önerilmektedir
AtıfTR Dizin1İncele - MakaleYalnız künye2017Business Process Reengineering with Simulation Method
Şenel, Mine; Şenel, Bilgin; Akan, Yaprak
The aim of this study is to establish the Turkish Lokomotif Sanayi A.Ş., which serves as the locomotive of the Turkish Heavy Industry. (TÜLOMSAŞ) 14 bench, 30 personnel and bogie workshop business process change engineering methods by using simulation models suitable for Hammer Champy model, to renew the processes, to utilize the technology more while renewing the processes and to produce much better quality products. To do this, six scenarios were developed by considering the constraints of the factory and all the business processes which were either feasible, but whose operation was uncertain, and models were created by using the computerized ARENA 9.0 Simulation program in this scenario. As a result of total 12 months of change engineering engineering applications, the scenario giving the closest result to the most applicable targets was selected and the annual bogie amount was increased to 2164 with the scenario selected while the annual bogie amount was 2029 before the change engineering application. With this study, the change that will be realized with the change engineer applications in the railway sector will be able to eliminate all the uncertainty states with the established simulation models and to examine the business processes in detail.