Browsing by Author "Koç, Ebubekir"
Now showing items 21-40 of 45
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An Improved Bees Algorithm for Training Deep Recurrent Networks for Sentiment Classification
Zeybek, Sultan; Pham, Duc Truong; Koç, Ebubekir; Seçer, Aydın (MDPI, 2021)Recurrent neural networks (RNNs) are powerful tools for learning information from temporal sequences. Designing an optimum deep RNN is difficult due to configuration and training issues, such as vanishing and exploding ... -
Improving the Surface Quality and Mechanical Properties of Selective Laser Sintered PA2200 Components by the Vibratory Surface Finishing Process
Khan, Hamaid M.; Sirin, Tolga B.; Tarakçı, Gürkan; Bulduk, Mustafa E.; Coşkun, Mert; Koç, Ebubekir; Kaynak, Yusuf (Springer, 2021)This paper attempts to improve the physical and mechanical properties of selective laser sintered polyamide PA2200 components through a vibratory surface finishing process by inducing severe plastic deformation at the ... -
Investigation of Direct Metal Laser Sintering Downskin Parameters’ Sagging Effect on Microchannels
Çalışkan, Cemal İrfan; Özer, Gökhan; Coşkun, Mert; Koç, Ebubekir (Springer, 2021)Additive manufacturing technology is an innovative and advantageous production technology in producing microchannels, heat exchangers designed in complex geometries. Process parameters developed to provide production ... -
Investigation of Elemental Distribution in the Sheet Sections After Aluminum Continuous Sheet Casting, Cold Rolling and Heat Treatment Processes
Ulus, Ali; İpek, Sadık Kaan; Ekici, Hamdi; Öter, Zafer Çağatay; Koç, Ebubekir (TMS Annual Meeting & Exhibition, 2018)Aluminum is used in millions of different products in many diverse industries from the aerospace industry to the food industry. Owing to its low density, high strength when alloyed, high elasticity, recyclability, high ... -
Investigation of Manufacturability and Efficiency of Micro Channels with Different Geometries Produced by Direct Metal Laser Sintering
Çalışkan, Cemal İrfan; Coşkun, Mert; Özer, Gökhan; Koç, Ebubekir; Vurkır, Turgut Azer; Yöndem, Gökay (Springer, 2021)Manufacturability without supports in design studies for additive manufacturing (AM) brings many advantages such as time, cost, part surface quality, and design freedom. It is thought that the geometries that can be ... -
Investigation of the Effects of Different Heat Treatment Parameters on the Corrosion and Mechanical Properties of the AlSi10Mg Alloy Produced with Direct Metal Laser Sintering
Özer, Gökhan; Tarakçı, Gürkan; Yılmaz, Mustafa S.; Öter, Zafer Çağatay; Sürmen, Ömer; Akça, Yaşar; Coşkun, Mert; Koç, Ebubekir (Wiley Online Library, 2019)In this study, AlSi10Mg samples produced by the direct metal laser sintering (DMLS) method were applied to heat treatment with different parameters (stress relief and T6). Heat‐treated and as‐built samples were subjected ... -
Investigation of the Surface Quality and Dimensional Accuracy of Polymer Patterns Produced by Selective Laser Sintering (SLS) Method for Investment Casting (IC)
Özer, Gökhan; Özbay, Burçin; Tarakçı, Gürkan; Yılmaz, Mustafa Safa; Bulduk, Mustafa Enes; Koç, Ebubekir; Acar, Serhat; Güler, Kerem Altuğ; Öter, Zafer Çağatay (Taylor & Francis Group, 2020)In this study, Polymer (Primecast® 101-EOS)patterns were produced with the EOS Formiga P110 system, and these patterns were compared with conventional wax patterns using their suitability for the investment casting (IC) ... -
Investigation of Wear Behavior of PA 12 Matrix Ceramic Reinforced Composites Produced by Selective Laser Sintering Method
Kısasöz, Burçin Özbay; Tütük, İbrahim; Koç, Ebubekir; Karabeyoğlu, Sencer Süreyya; Kısasöz, Alptekin (Gazi University, 2024)In this study, ceramic-reinforced PA 12 matrix composites were fabricated by using Selective Laser Sintering (SLS) additive manufacturing method with different energy density values. Additionally, dry sliding wear tests ... -
Kuşevleri ve 3 Boyutlu Baskı Yöntemi ile Üretimi
Çalışkan, Cemal İrfan; Koç, Ebubekir (FSM Vakıf Üniversitesi, 2019-06)İnceliğin estetiğe, estetiğin mimariye dönüştüğü kuşevi, yaşadığımız coğrafyada, yüzyıllar öncesi temelleri atılmış bir geleneğin, kültürel değerin günümüze ulaşan, kaybolmasından endişe duyulan izleri olarak görülebilir. ... -
Makine Öğrenme Metotları Kullanılarak Fonların Fiyat Tahmini İçin Model Geliştirilmesi
Çalışkan, Sedrettin (Fatih Sultan Mehmet Vakıf Üniversitesi, Lisansüstü Eğitim Enstitüsü, 2020)Bu tez çalışmasında, makine öğrenme algoritmaları kullanılarak fonlann fiyat tahmini için model geliştirilmesi yapılmıştır. Fon fiyat tahmin sistemi amacıyla geliştirilmesi yapılan model çalışmasında kullanılan veri setinin ... -
MS-TR: A Morphologically Enriched Sentiment Treebank and Recursive Deep Models for Compositional Semantics in Turkish
Zeybek, Sultan; Koç, Ebubekir; Seçer, Aydın (Taylor & Francis, 2021)Recursive Deep Models have been used as powerful models to learn compositional representations of text for many natural language processing tasks. However, they require structured input (i.e. sentiment treebank) to encode ... -
A Novel 3D Printed Air-Cooled Fuel Cooler Heat Exchanger for Aviation Industry
Koca, Aliihsan; Çalışkan, Cemal İrfan; Koç, Ebubekir; Akbal, Ömer (Taylor & Francis Ltd., 2022)Unmanned aerial vehicles are expected to complete their missions even in adverse weather conditions. Overheating in the engine area may occur, particularly at high speeds due to using the full engine throttle. Another ... -
Numerical Investigation of Heat Current Study Across Different Platforms in SLM Processed Multi-Layer AlSi10Mg
Khan, Hamaid Mahmood; Dirikolu, M. Hüsnü; Koç, Ebubekir; Öter, Zafer Çağatay (Elsevier, 2018)Selective Laser Melting (SLM) of three dimensional multi-layer model is being numerically investigated using finite element method with academic ANSYS software. The temperature distribution and melt pool formation with ... -
Parameters Optimization for Horizontally Built Circular Profiles: Numerical and Experimental Investigation
Khan, Hamaid Mahmood; Dirikolu, M. Hüsnü; Koç, Ebubekir (Elsevier, 2018)Selective laser melting (SLM), a type of additive manufacturing (AM) process, is chosen for direct fabrication of powder-based functional metallic objects. The designing of small circular geometries or overhang surfaces ... -
Production of Metallic Parts by Additive Manufacturing
Yılmaz, Fevzi; Koç, Ebubekir; Tekkeşin, Mustafa (IMMC, 2014-09)The additive manufacturing technology has been introduced early in 1980s, since then it became one of the key technologies to manufacture everything from prosthetic limbs to aircraft parts in many industries. In this ... -
Selective Laser Sintering of Aluminum Extrusion Dies
Koç, Ebubekir; Akça, Yaşar; Öter, Z. Çağatay; Coşkun, Mert (FSM Vakıf Üniversitesi, 2016-12)In this study, geometric forms of maraging steel dies used in aluminum extrusion were optimized by means of flow dynamics as well as surface quality and mechanical properties of the final part. Maraging steel (MS1) dies ... -
Support Optimization for Overhanging Parts in Direct Metal Laser Sintering
Öter, Zafer Çağatay; Çoşkun, Mert; Akça, Yaşar; Sürmen, Ömer; Yılmaz, Mustafa Safa; Özer, Gökhan; Tarakçı, Gürkan; Khan, Hamaid Mahmood; Koç, Ebubekir (Elsevier, 2019)The present work focuses mainly on the utilization of different support profiles for overhang structures in EOS M290 Direct Metal Laser Sintering (DMLS) machine. Maraging steel (MS1) parts with large overhangs were ... -
Tek Boyutlu(1D) Indırect Tıme-Of-Flıght(İtof) Tabanlı Sensör Uygulaması
Mutlu, Abdul Kadir (Fatih Sultan Mehmet Vakıf Üniversitesi, Lisansüstü Eğitim Enstitüsü, 2021)Tez çalışmasında, ışık kaynağının kullanıldığı ölçüm yöntemlerinin biyomedikal alandaki kullanımları belirtilip uçuş süresi(time-of-flight) yöntemiyle çalışan tek boyutlu ölçümler yapabilen bir sensör geliştirilmiştir. ... -
Thermoplastic Polymers and Polymer Composites Used in Selective Laser Sintering (SLS) Method
Kısasöz, Burçin Özbay; Koç, Ebubekir (Springer, 2023)Selective laser sintering (SLS) is a powder bed fusion (PBF) additive manufacturing (AM) technique that uses high-energy beams (laser beams, electron beams, or an infrared panel heater) to coalescence (or melt) ... -
Thermo‑Mechanical Simulations of Selective Laser Melting for AlSi10Mg Alloy to Predict the Part‑scale Deformations
Söylemez, Emrecan; Koç, Ebubekir; Coşkun, Mert (Springer, 2019)Abstract Selective laser melting (SLM) is one of the most frequently employed metal additive manufacturing methods. Various industries such as aerospace, automotive, biomedical, and tooling utilize SLM parts. Although ...
