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Development and functionalization of electrospun fiber coated thin film microextraction devices for rapid mass spectrometric determination of biologically important polar molecules
Öztürk, Merve; SALİH, BEKİR; Eroğlu, Ahmet E.; Boyacı, Ezel (2024-06-15)
Rapid diagnosis of diseases is one of the challenging areas in clinical research. From the analytical chemist's perspective, the main challenges are isolating the compounds from the bio-specimen and lengthy analysis times....
Tailoring titanosilicate molecular sieves by vanadium substitution for humidity sensing applications
Davoudnezhad, Ramona; Kuzyaka, Duygu; Akata Kurç, Burcu (2024-03-15)
There is a great interest in developing humidity sensors with enhanced sensitivity at all relative humidity (RH) ranges. To explore this, vanadium (V)-incorporated titanosilicate microporous thin films were successfully fa...
The effect of inelastic behavior of beam-to-column connection regions on the seismic performance of RC frame structures
Akın, Umut; Burak Bakır, Burcu; Department of Civil Engineering (2024-3-06)
The seismic behavior of reinforced concrete frame structures substantially depends on the response of beam-column connection regions as revealed by prior experimental research studies. Accurate evaluation of the nonlinear ...
Studies on the nanocellulose filled polylactide based biocomposites
Sarı, Burcu; Kaynak, Cevdet; Department of Polymer Science and Technology (2024-3)
In the first part of this dissertation, the main purpose of the first step was to obtain and characterize cellulose nanocrystal (CNC) particles by applying sulfuric acid hydrolysis method to the starting material of microc...
Ground Motion Simulation in Large Basins
Şişman Dersan, Fatma Nurten; Dicleli, Murat; Askan Gündoğan, Ayşegül; Department of Engineering Sciences (2024-2-23)
A significant component of seismic risk evaluation estimation is the assessment of potential earthquake ground motion records which are anticipated during future earthquakes. For this purpose and other engineering applicat...
Modelling and simulation of friction in metal forming applications
Başpınar, Murat; Darendeliler, Haluk; Department of Mechanical Engineering (2024-2-23)
In this study, a generalized friction model is proposed to be applied in metal forming processes. Friction model takes into account junction growth of asperities during combined loading and in order to represent real life ...
Frequency Response Function Based Modal Updating of Aerospace Structures
Genç, Cem; Çalışkan, Mehmet; Department of Mechanical Engineering (2024-2-16)
This thesis explores finite element updating methods based on frequency response functions (FRFs), comparing classical modal approaches with newer techniques like Amplitude Residue (AR) or mostly called Response Function M...
Numerical investigation of aerodynamics of missiles with wrap-around tail fins
Demirtaş, Uğurtan; Sezer Uzol, Nilay; Department of Aerospace Engineering (2024-2-15)
This thesis investigates the aerodynamic characteristics of roll induction for missiles with wrap-around tail fins by performing steady-state RANS and unsteady URANS and DDES simulations. In RANS simulations, the effects o...
The Catalysing Role of Interfaces, in the Ongoing Creation of Space at Different Urban Scales
Atak Akbulut, Hazal; Ataöv Demirkan, Anlı; Aykaç Leıdholm, Pınar; Department of City and Regional Planning (2024-2-12)
The pursuit of rigid order and control in urban planning has led to the fragmentation of urban areas and the deterioration of the interrelation among system components that interact in an integrated way. By prioritizing pi...
WHO LEADS THE WAY? BUYER VS. SUPPLIER INITIATIVES IN SUPPLY CHAIN CARBON FOOTPRINT REDUCTION
Elif, Kuşçu; Karaer, Özgen; Tan, Tarkan; Department of Industrial Engineering (2024-2-6)
We study two supply chain models: (i) Buyer-Led Supplier Development and (ii) Supplier-Led Supplier Development, which are consisting of a buyer and a supplier. We analyze which player should initiate the carbon footprint ...
The effects of service design on super app brand perception and user experience
Şimşekler, Sümeyye; Pedgley, Owaın Francıs; Yekta, Bakırlıoğlu; Department of Industrial Design (2024-1-27)
This study aims to investigate the effects of service design elements (user interface, payment, logistics, return process, and customer support services) on super apps brand perception and user experiences by also consider...
DETERMINATION OF PROBABILITY OF INTERNAL EROSION IN EARTHEN DAM SEEPAGE
Yanar, Oğulcan; Çalamak, Melih; Department of Civil Engineering (2024-1-26)
Piping, caused by internal erosion, is one of the main failure modes of earthen dams. In this study, a probabilistic modeling framework was proposed to determine the reliability of an earthen dam against internal erosion. ...
3D printed concrete: multiscale mechanical characterization and computational modeling
Bayrak, Alper Tunga; Sarıtaş, Afşin; Akgül, Çağla; Department of Civil Engineering (2024-1-26)
This thesis presents a comprehensive exploration of the physical, mechanical, and thermal properties of 3D Printed Concrete (3DPC) structures across micro, meso, and macrostructural scales. The central focus is the analysi...
Probabilistic hazard assessment of seismically-induced slope deformations
Akbaş, Burak; Çetin, Kemal Önder; Gülerce, Zeynep; Department of Civil Engineering (2024-1-26)
Risk and safety assessment of earthquake-induced slope deformations are critical for proper management and mitigation of secondary hazards arising from the ground shaking during seismic events. Therefore, the objective of ...
INVESTIGATION OF ARTIFICIAL INTELLIGENCE TOOLS IN DESIGN PROCESS AND CREATIVITY
Arda, Denizhan; Börekçi, Naz Ayşe Güzide Z.; Department of Industrial Design (2024-1-26)
In recent years, artificial intelligence (AI) tools have seen a significant development and entered many areas of our lives. Sources of inspiration related to design, current news channels, and social media pages share vis...
CHALLENGES OF PRE-SERVICE PHYSICS TEACHERS IN ARGUMENT-DRIVEN INQUIRY ACTIVITIES
Demirtaş, Dilber; Özdemir, Ömer Faruk; Yıldırım, Ufuk; Department of Secondary Science and Mathematics Education (2024-1-26)
This study aimed to investigate challenges faced by pre-service physics teachers (PPTs) in an online course based on Argument-Driven Inquiry (ADI) as they acted as learners, planners, and instructors. An undergraduate elec...
BEYOND THE SURFACE: UNRAVELING THE IMPACTS OF MICROPLASTICS, DISSOLVED ORGANIC CARBON AND WARMING ON BACTERIA AND CILIATES
Yalçın, Gülce; Beklioğlu, Meryem; Jeppesen, Erik; Department of Biology (2024-1-26)
Shallow lake ecosystems face multiple stressors, including microplastic (MP) pollution, allochthonous dissolved organic matter (allo-DOM or tDOM) inputs, and the impact of climate change on water temperature. With the aim ...
SYNCHRONIZATION OF CHAOS THROUGH UNPREDICTABILITY IN DYNAMICAL SYSTEMS
Başkan, Kağan; Kürkcüoğlu, Seçkin; Akhmet, Marat; Department of Physics (2024-1-26)
The investigation of chaos synchronization spans three decades, resulting in the development of several methods such as identical, phase, and generalized synchronization. However, conventional methods often fail to detect ...
THE ROLE OF G-DOMAIN ON K-RAS AND Gα DIMERIZATION
Aydın, İrem; Son, Çağdaş Devrim; Department of Molecular Biology and Genetics (2024-1-26)
K-Ras protein is a member of the Ras superfamily, also known as a small G protein, and plays roles in different signaling pathways via binding and activating various effectors. Most of these pathways enable cellular activi...
Melt infiltration squeeze casting of SiC reinforced functionally graded metal matrix composite processing and characterization
Tatlışen, Eralp; Kalkanlı, Ali; Department of Metallurgical and Materials Engineering (2024-1-26)
Today, silicon carbide(SiC) ceramics reinforced with aluminum(Al) are used in variety of applications such as ballistics, structural applications, automotive industry and electrical systems. The aim of this study is to pro...
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