Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
Browse
7 results
Search Results
Now showing 1 - 7 of 7
Conference Object A Gyrostabilizer Test Setup With Vessel Motion Capability About Its Metacenter(Springer Science and Business Media B.V., 2023) Bozelli, M.R.; Kurt, B.; Dede, M.İ.C.The rolling motion of the vessels decreases the comfort of the passengers and may damage the goods inside. Gyrostabilizers are used for generating anti-rolling torque to stabilize the vessel. This study presents a new test system that can imitate sea states resulting in the rolling motion of the vessel about its metacenter. This new system allows the study of gyrostabilizer control and test of sensory systems without the need for an actual vessel and sea environment. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.Conference Object Optimization of the Flywheel of a Gyrostabilizer by Addressing “fair” Performance Criteria(Springer Science and Business Media B.V., 2023) Kurt, B.; Bozelli, M.R.; Dede, M.İ.C.Gyrostabilizers are used for producing anti-rolling torque to stabilize the undesired rolling motion of a vessel. There are several gyrostabilizer products with different specifications for the same size ships. This paper investigates this issue and proposes “fair” performance criteria for gyrostabilizers considering the targeted sea state conditions. A case study is carried out using the new performance criteria in a gyrostabilizer optimization process. The results indicate that the optimized design can outperform the commercially available products. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.Conference Object Citation - Scopus: 1Water Quality Evaluation Using Various Water Quality Indices: a Case Study for B. Menderes River, Turkey(International Association for Hydro-Environment Engineering and Research, 2022) Bor, A.; Elgi, Ș.Water quality is an important factor for public health and aquatic life, and it has become an increasingly important problem due to the growth ofthe population, urban expansion, and development. Forthis reason, the evaluation of surface water quality is an important issue for countries. Water quality indexing is widely used to present complex water quality data in a more comprehensible form and provides decision-makers and non-technical managers ofwater resources with concise information about water quality status. In this study, the water quality is determined based on the water quality monitoring data obtained from the Kocarli Bridge gauging station in the B. Menderes Riverforthe 9 years period between 2006 and 2014. The main pollutants in this region, with parameters exceeding border limit values PH were found to be Sulphate (S04), Nitrate (N03), Ammonia (NH4), Nitrite (N02), Phosphate (P04), Electrical Conductivity (EC), Total Dissolved Solids (TDS) Calcium (CA), Magnesium (MG), Sodium (Na), Potassium (K) and Bacteriological Parameters (E-coli, F-Strp, and Total Coli). In addition, five different WQI performances are compared so that the data can be easily interpreted. The methods used were the weighted arithmetic index (WAI-WQI) Environmental Water Quality Index (CCME-WQI) Canadian Council of Canada (CCME-WQI), Universal Water Quality Index (UWQI), Oregon Water Quality Index (0WQI), and Aquatic Toxicity Index (ATI). The applicability of different methodologies is discussed, and significant inconsistencies were observed between the classification results. © 2022 IAHR.Conference Object Citation - Scopus: 2The Role of the Computational Designer From Computer-Aided Design To Machine Learning-Aided Design a Study on Generative Models and Design Prompts(Education and research in Computer Aided Architectural Design in Europe, 2023) Yonder, V.M.; Dulgeroglu, O.; Dogan, F.; Cavka, H.B.The rising sophistication of digital design technologies and instruments requires computational designers to acquire a broader set of abilities, such as expertise in a variety of digital models, scripting languages, and the ability to manage complicated data models. In the field of design, the concepts of machine learning-aided design and data-driven techniques contribute to the production of various and numerous design possibilities. Ultimately, this will lead the computational designer to redefine his or her power over the design protocol. In this paper, ChatGPT-3.5, Dall-E v2, and Stable Diffusion, cutting-edge artificial intelligence models, are used to construct sample design scenarios. Using a text mining application, the scenario-specific prompts were examined to explore these models' computational design potential. © 2023, Education and research in Computer Aided Architectural Design in Europe. All rights reserved.Article Introducing Engineering Students To Microfluidics and 3d Printing Using Hands-On Activities(American Society for Engineering Education, 2023) Dogan, E.; Borgaonkar, A.D.; Nafisi, N.; Miri, A.K.Microfluidics technology involves the regulation of flow in micron-sized channels for desired reactions, with applications in biological modeling, drug manufacturing, screening of biological agents, and various engineering fluid dynamics-related purposes. Despite its growth and development, microfluidics has not been widely included as a teaching topic in undergraduate engineering education. This manuscript presents a hands-on project-based learning approach that can be easily implemented into core engineering courses, such as fluid mechanics, transport, chemical reactions, and others. Project-based activities presented here have three main parts: material preparation based on synthetic polymers, light-assisted manufacturing of a microfluidic device, and mass transport experiments to observe the fluid behavior. The project leverages 3D printing and the potential to connect students with makerspaces and 3D printing and to get them started on the path to bringing their ideas to life. The paper includes a breakdown of how to access and evaluate these activities. As a result of this hands-on activity, students will understand how fluid mechanics concepts are applied to microfluidics. Students will also learn about a novel interdisciplinary field that is growing rapidly. Engineering technology students will benefit from exposure to the application side of this emerging field through these lab-style activities that they are accustomed to in the majority of their core courses. Finally, the authors hope that such successful integration will encourage faculty to introduce other novel science and engineering topics that are currently only accessible through research experiencebased courses. © 2023, American Society for Engineering Education. All rights reserved.Review Citation - WoS: 18Citation - Scopus: 18A Review on New Cobalt-Free Cathode Materials for Reversible Solid Oxide Fuel Cells(Chulalongkorn Univ, Metallurgy & Materials Science Research Inst, 2023) Akkurt, Sedat; Sındırac, Can; Özmen Egesoy, Tuğce; Ergen, EmreThe exponential growth in the requirement of fuel cells and batteries leads to increased demand for cobalt due to its common use in high-performance Li-ion batteries and high-temperature fuel cells/electrolyzers. This sharp increment in demand raises concern about the availability of limited reserves of cobalt which can impact the price of cobalt. Moreover, the geographic limitations of cobalt resources may endanger the whole supply chain. In addition to all those, huge moral issues of cobalt mining are also another problem. Hence, leading battery, fuel cells and electrolyzer manufacturers are looking for sustainable alternatives to reduce cobalt dependency. A more specific limitation is shown in Solid Oxide Fuel Cells (SOFCs) cathode materials that contain cobalt. Incompatibilities have already been observed between the cathode materials containing cobalt and the electrolytes in terms of the thermal expansion coefficient mismatch during the transition of the operating temperature from high to low. An advantage of low operating temperatures is the reduction of material costs compared to high temperature. Increasing the electrochemical performance of the cell and eliminating thermal expansion coefficient difference problems are in concert aimed at the development of cobalt-free cathode materials. Therefore, cobalt-free cathode materials are vital for the sustainability of SOFCs and green transition of the energy sector since they can be used as cathode and anode material in symmetrical SOFCs which is also known as reversible SOFC (RSOFC). In this review, we comprehensively summarize the recent advances of cobalt-free perovskite cathode materials for intermediate temperature RSOFCs.Editorial The Editorial Preface: Contemporary Histories of Design and Transience(Univ Oviedo, 2023) Emgin, Bahar; Ata, Zeynep; Tunç Cox, Ayça; Kılınç, Kıvanç[No abstract available]