Faculty of Engineering

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Ergül, Özgür Salih (287)
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Recent Submissions

Nanoparticle concentration and solvent exchange via organic solvent ultrafiltration Ozcelik, Feyza; Çulfaz Emecen, Pınar Zeynep (2025-02-19) Downstream processing of nanoparticles after synthesis frequently involves purification, concentration and solvent exchange steps. While these are typically done via centrifugation in lab scale, ultrafiltration is a practi...
Isotropic gap formation, localization, and waveguiding in mesoscale Yukawa-potential amorphous structures Sarihan, Murat Can; Gövdeli, Alperen; Lan, Zhihao; Yilmaz, Yildirim Batuhan; Erdil, Mertcan; Wang, Yupei; Aras, Mehmet Sirin; Yanik, Cenk; Panoiu, Nicolae Coriolan; Wong, Chee Wei; Kocaman, Serdar (2024-12-01) Amorphous photonic structures are mesoscopic optical structures described by electrical permittivity distributions with underlying spatial randomness. They offer a unique platform for studying a broad set of electromagneti...
Traditional seismic hazard analyses underestimate hazard levels when compared to observations from the 2023 Kahramanmaras earthquakes Altindal, Abdullah; Askan Gündoğan, Ayşegül (2024-12-01) A sequence of two major earthquakes, Mw7.8 Pazarcik, and Mw7.5 Elbistan, struck Southeastern Turkey in February 2023. The large magnitudes of the earthquakes and the short time between the two events raised questions about...
Communication of project risk assessment information through visuals Dikmen Toker, İrem; Karakocak, Elif; Birgönül, Mustafa Talat (2024-12-01) Risk assessment is aimed at providing necessary risk-related information to decision-makers for formulating risk mitigation strategies. Poor communication of its context and outputs may lead to misperceptions and wrong jud...
Supercooled erythritol for high-performance seasonal thermal energy storage Yang, Sheng; Shi, Hong-Yi; Liu, Jia; Lai, Yang-Yan; Bayer, Özgür; Fan, Li-Wu (2024-12-01) Seasonal storage of solar thermal energy through supercooled phase change materials (PCM) offers a promising solution for decarbonizing space and water heating in winter. Despite the high energy density and adaptability, n...
Privacy-preserving federated machine learning on FAIR health data: A real-world application Sınacı, Ali Anıl; Gencturk, Mert; Alvarez-Romero, Celia; Laleci Erturkmen, Gokce Banu; Martinez-Garcia, Alicia; Escalona-Cuaresma, María José; Parra-Calderon, Carlos Luis (2024-12-01) Objective: This paper introduces a privacy-preserving federated machine learning (ML) architecture built upon Findable, Accessible, Interoperable, and Reusable (FAIR) health data. It aims to devise an architecture for exec...
Defining faces, defying borders: authority conflicts between medical specialties through cosmetic interventions ERGUR, ALİ; Akkaya, Beril; Saral, C. (2024-12-01) At first glance, medical specializations seem to be delineated according to well-defined scientific criteria; the apparently-functional division of labor generates a general hierarchy of specialized knowledge and practice....
Design Optimization of a Novel Flush Boundary Layer Diverter Kucuk, Umut Can; Tuncer, İsmail Hakkı (2024-12-01) A novel boundary layer diverter is designed and optimized for increasing the performance of a typical semi-submerged inlet ingesting large amounts of boundary layer flow. A conceptual diverter configuration based on the pr...
The use of chitosan aerogels as an adsorbent for the regeneration of frying oil Delice, Feyza Nur; Namlı, Serap; Uzun, Merve Akpınar; GÜVEN, ÖZGE; TEKİN, AZİZ; Öztop, Halil Mecit (2024-11-01) One of the most commonly used food preparation methods is deep-fat frying. The improvement of the quality of used frying oil (UFO) is important because the reuse of frying oil could provide significant savings to the food ...
Graph domain adaptation with localized graph signal representations Pilavcı, Yusuf Yiğit; Güneyi, Eylem Tuğçe; Cengiz, Cemil; Vural, Elif (2024-11-01) In this paper we propose a domain adaptation algorithm designed for graph domains. Given a source graph with many labeled nodes and a target graph with few or no labeled nodes, we aim to estimate the target labels by makin...
Transmit beampattern design for FDA-MIMO radar using complex manifold optimization Özen, Berkcan; Tuncer, Temel Engin (2024-11-01) Frequency diverse array multiple-input multiple-output (FDA-MIMO) radar can produce time-stationary range-angle dependent beampattern. The problem with these beampatterns is the repeating lobes in the angle-range domain. D...
Perceptions of built environment professionals on intelligent office buildings: The interplay between technology, design for sustainability and responsiveness Gündoğan, Handan; Dikmen Toker, İrem; Atasoy Özcan, Güzide (2024-10-15) The confluence of technological advances, climate mitigation efforts, and evolving user expectations has significantly transformed how the built environment is conceptualized, designed, and delivered; Intelligent Buildings...
Oxide coated nickel powder as support for platinum(0) nanoparticles: Magnetically separable catalysts for hydrogen generation from the hydrolysis of ammonia borane Akbayrak, Serdar; Çakmak, Gülhan; Öztürk, Tayfur; Özkar, Saim (2024-10-15) We report the development of a novel method for the preparation of magnetically separable platinum nanoparticles. Magnetic nickel nanopowder is initially synthesized in a radiofrequency plasma reactor where in-line passiva...
Pushout tests on demountable bolted angle shear connectors for steel-concrete composite structures Karakuş, Berk; Arıkoğlu, Pınar; Topkaya, Cem (2024-10-15) Welded connectors are commonly utilized in steel-concrete composite construction. However, these connectors lack demountability, hindering the recycling or reuse of steel sections. In response to this limitation, high-stre...
Feedback motion planning via sequential composition of random elliptical funnels Durmaz, Atakan; Ozdemir, Oguz; Ankaralı, Mustafa Mert (2024-10-15) This paper presents a novel feedback motion planning and control framework tailored for unmanned surface vehicles (USVs), validated through experiments on a physical USV platform. The framework utilizes sparse random neigh...
Optically responsive dry cholesteric liquid crystal marbles Kocaman, Ceren; Batır, Özge; Büküşoğlu, Emre (2024-10-01) Dry liquid crystal marbles are structures that consist of cholesteric liquid crystal (CLC) droplets prepared by the mixture of chiral-doped thermotropic LCs encapsulated by cellulose nanocrystals (CNCs) that have been drie...
Numerical and experimental investigations of swirl-stabilized partially premixed flames using natural gas-hydrogen-air mixtures Böncü, Emre; Güleryüz, Dilay; Karaca, Mehmet; Allouis, Christophe Gerard; Gökalp, İskender (2024-10-01) This study uses experimental and numerical techniques to examine natural gas and hydrogen mixtures as fuel with a partially premixed swirl-stabilized burner. Variations in the fuel mixture composition were investigated thr...
Accelerated 3D CFD modeling of multichannel flat grooved heat pipes Gökçe, Gökay; Çetin, Barbaros; Dursunkaya, Zafer (2024-10-01) Flat grooved heat pipes (HPs) have become essential in advanced thermal management solutions across various engineering applications. Modeling these devices, especially multichannel flat grooved HPs, involves significant c...
Material modeling and recent findings in transcatheter aortic valve implantation simulations Mutlu, Onur; Saribay, Murat; Yavuz, Mehmet Metin; Salman, Huseyin Enes; Al-Nabti, A.Rahman D.M.H.; Yalcin, Huseyin Cagatay (2024-10-01) Background and objective: Transcatheter aortic valve implantation (TAVI) has significantly transformed the management of aortic valve (AV) diseases, presenting a minimally invasive option compared to traditional surgical v...
Scour at the rear side of rubble mound revetments due to random wave overtopping: Laboratory experiments Yıldırım, Mehmet Emre; Yaman, Mert; Baykal, Cüneyt (2024-10-01) This study presents the physical model experiments on the wave overtopping induced bed level changes at an unprotected rear side of a rubble mound revetment with a crown wall. In the experiments, the wave conditions, the b...

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