Faculty of Engineering

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Ergül, Özgür Salih (287)
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Recent Submissions

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...
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...
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...
Tungsten oxide filled nanofibers for optical limiting in near infrared region PEPE, YASEMİN; AKKOYUN, ŞERİFE; Asci, Nurcan; Cakır, Onuralp; Tutel, Yusuf; Emrah Unalan, Husnu; KARATAY, AHMET; ELMALI, AYHAN (2024-09-01) In this study, tungsten trioxide (WO3) nanoparticles synthesized by a slightly modified reduction method were used as nanofillers in polyvinylpyrrolidone (PVP) nanofibers produced via electrospinning. SEM images revealed w...
A Numerical Investigation of Longitudinal Track–Bridge Interaction in Simply Supported Precast Concrete Girder Railway Bridges Ozturk, Alper; Baran, Eray; Askan Gündoğan, Ayşegül (2024-08-01) In railway tracks, additional stresses occur in rails due to interaction between the rail and the bridge superstructure, which is a phenomenon known as track–bridge interaction (TBI). The additional rail stresses (ARSs) de...
Unravelling temperature-dependent molecular changes in hydrated wheat and maize starches using 1H time-domain NMR van Rooyen, Jana; Grunin, Leonid; Öztop, Halil Mecit; Kruk, Danuta; Manley, Marena (2024-08-01) This study proved that time-domain NMR (TD-NMR) experiments can accurately demonstrate the interaction between starch (wheat and maize) and water and the distribution of water molecules in starch-water systems during heati...
Potential-based reward shaping using state–space segmentation for efficiency in reinforcement learning Bal, Melis İlayda; Aydın, Hüseyin; İyigün, Cem; Polat, Faruk (2024-08-01) Reinforcement Learning (RL) algorithms encounter slow learning in environments with sparse explicit reward structures due to the limited feedback available on the agent's behavior. This problem is exacerbated particularly ...
WLAV state estimation based topology error detection and identification in distribution networks with limited number of measurements Parlaktuna, Kemal; Dursun, Erk; Göl, Murat (2024-07-01) Rapidly populating renewable energy sources and storage units at the distribution system, made it crucial to monitor the system in real-time. This necessity brings new challenges and business opportunities for the distribu...
A novel CFD-ANN approach for plunger valve optimization: Cost-effective performance enhancement Kaak, Abdul Rahman Sabra; Çelebioğlu, Kutay; Bozkuş, Zafer; Ulucak, Oğuzhan; Aylı, Ece (2024-07-01) This paper introduces a novel computational fluid dynamics-artificial neural network (CFD-ANN) approach that has been devised to enhance the efficiency of plunger valves. The primary emphasis of this research is to achieve...
Non-invasive real-time diagnosis of PMSM faults implemented in motor control software for mission critical applications Demirel, Aykut; Keysan, Ozan; El-Dalahmeh, Ma'd; Al-Greer, Maher (2024-06-15) The machine's health should be continuously monitored, or a test should be applied on a regular basis to predict failure before fatal damage is incurred. Unexpected failures, particularly in mission-critical applications, ...
Failure Analysis of Abutment-Loaded Underground Coal Mine Stoppings during Explosion Karadeniz, Kutay E.; Güner, Doğukan; Sherizadeh, Taghi (2024-06-01) Underground mine structures like mine seals or built-in-place (BIP) refuge alternatives (RA) are exposed to specific loadings like explosions because of overlying and underlying strata conditions. Previous studies worked o...
Reduction of lipid oxidation in olive oil using gelatin-based centrifugally spun fibers loaded with caffeic acid Guler, Gunes Su; Yıldız, Eda; Yazicioglu, Nalan; Şümnü, Servet Gülüm; Şahin, Serpil (2024-06-01) Centrifugal spinning is a novel method in order to produce fibers in a fast and efficient way. The objective of this study was to explore the impact of varying concentrations of caffeic acid on the attributes of gelatin-ba...
Effect of dynamic soil-structure interaction modeling assumptions on the calculated seismic response of railway bridges with single-column piers resting on shallow foundations İmamoğlu, Çağrı; Dicleli, Murat (2024-06-01) In this study, the effect of dynamic soil-structure modelling assumptions on the calculated seismic response of railway bridges with single column piers resting on shallow foundations is investigated. For this purpose, 10 ...
A non-iterative boundary element formulation for nonlinear viscoelasticity Akay, Ahmet Arda; Gürses, Ercan; Göktepe, Serdar (2024-06-01) In this study, we propose a non-iterative boundary element method (BEM) of highly nonlinear viscoelasticity in time domain. The computationally attractive iteration-free algorithmic structure is achieved by the linearizati...
Joint shear strength prediction for fiber reinforced concrete beam-to-column connections Kantekin, Yunus; Burak Bakır, Burcu (2024-06-01)
Multichannel multimodal piezoelectric middle ear implant concept based on MEMS technology for next-generation fully implantable cochlear implant applications Pirim, Feyza; Atik, Ali Can; Yüksel, Muhammed Berat; Yılmaz, Akın Mert; UĞUR, MEHMET BİROL; Tunalı, Selçuk; BATU, AYKAN; Aslan, Mahmut Kamil; Özer, Mehmet Bülent; Külah, Haluk (2024-06-01) This paper introduces a unique multimode, multichannel piezoelectric vibration sensor for the next-generation fully implantable cochlear implant (FICI) systems. The sensor, which can be implanted on the middle ear chain to...
A life cycle assessment of the membrane processes applied for salt recovery from reactive dyeing wastewater Şimşek, Naz Zeynep; Yetiş, Ülkü (2024-06-01) The environmental impacts of membrane treatment for salt and water recovery from reactive dyeing wastewater are assessed using the Life Cycle Assessment (LCA) framework. Three membrane treatment options (UF-only, NF-only, ...
Fuzzy Einstein-based decision-making model for the evaluation of site selection criteria of floating photovoltaic system Melek, Abiddin Berhan; Gökmener, Serkan; Haspolat, Emre; Çiçek, Doğa Derman; Deveci, Muhammet; Oğuz, Elif; Khorasanchi, Mahdi (2024-06-01) The site selection step is one of the milestones required to ensure the success of a renewable energy project. The present study proposes a novel framework for the suitable site selection of floating photovoltaic (FPV) sys...
The effect of foot somatosensory loss in postural control during Functional reach test in patients with diabetic polyneuropathy: A controlled study Kahveci, Abdulvahap; Cengiz, Berat Can; Alcan, Veysel; Gürses, Senih; ZİNNUROĞLU, MURAT (2024-06-01) Background: In patients with diabetic polyneuropathy (DPN), differences in postural control due to losing the lower limb somatosensory information were reported. However, it is still unclear by which mechanisms the dynamic...
LONG-TERM WIND POWER AND GLOBAL WARMING PREDICTION USING MARS, ANN, CART, LR, AND RF Yılmaz, Yavuz; Nalçacı, Gamze; Kańczurzewska, Marta; Weber, Gerhard Wilhelm (2024-06-01) The modeling of electricity generation plays a crucial role in investment and long-term planning in power systems, primarily due to the significant volatility associated with wind and solar energy sources. Nevertheless, fo...

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