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ECO-FRIENDLY STABILIZATION OF SOFT CLAYS: UTILIZING SEWAGE SLUDGE AS A SUSTAINABLE ALTERNATIVE TO CEMENT Haroon, Muhammad Usama; Ekinci, Abdullah; Sustainable Environment and Energy Systems (2026-1-19) Rapid growth in wastewater treatment has intensified the challenge of managing sewage sludge (SS), while the energy- and carbon-intensive nature of Portland cement underscores the need for lower-impact soil stabilisation methods. This thesis investigates the technical and environmental feasibility of partially replacing cement with SS and thermally treated sewage sludge ash (SSA) in cement-stabilised clay. The program spans five SS/SSA conditions (fresh SS; SS at 105°C; SSA at 300, 600, and 1100°C), three c...
Locally stationary time vertex process models Aslan, Deniz; Vural, Elif; Department of Electrical and Electronics Engineering (2026-1-13) Graph signal processing provides a powerful framework for analyzing data defined over irregular network structures. In many real-world applications, time-vertex signals are observed only partially due to sensing failures, communication constraints, or limited data availability, making the learning of reliable signal models a challenging task. In particular, estimating parametric models from incomplete time-vertex observations requires capturing both temporal dynamics and graph-dependent statistical structur...
-(y)Ip Constructions in Turkish Kesici, Alper; Gracanın Yüksek, Martına; Department of English Language Teaching (2026-2-6) This study examines -(y)Ip constructions in Turkish and addresses three issues: (i) the structural status of the -(y)Ip constituent as an adjunct or a conjunct, (ii) the distribution of null and overt subjects in -(y)Ip constructions, and (iii) the height at which the -(y)Ip constituent is merged. I first argue that the -(y)Ip constituent is an adjunct rather than a conjunct. This is based on the behavior of the -(y)Ip constituent compared to veAND-coordination and adverbial clauses. Adopting this analysis,...
BUSINESS ORGANIZATIONS AND POLITICS IN TÜRKİYE: THE RELATIONSHIP BETWEEN CHAMBERS OF COMMERCE AND GOVERNMENTS (1920-1960) Seval, Emin Mirbatur; Çelik, Birten; Department of History (2026-2-2) This thesis analyzes the strategic relationships between chambers of commerce and the state, governments, and political parties in Türkiye from 1920 to 1960. Following the abolition of the Ottoman sultanate in 1922 and the establishment of the Turkish Republic in 1923, the chambers of commerce evolved significantly due to state policies, economic conditions, and ideological shifts. During the Republican era, the businesspeople via the chambers of commerce had to adapt to the national economic policies of th...
Diagnosing Autism Spectrum Disorder in High-Functioning Adults Using Deep Learning Models on the Web-Based Data Shafique, Ali; Yesilada Yilmaz, Yeliz; Eraslan, Sukru; Computer Engineering (2026-1-21) Autism Spectrum Disorder (ASD) is a neurodevelopmental condition characterized by social-communication difficulties, repetitive behaviors, and restricted interests. Detection supports timely intervention and improved outcomes. Eye-tracking combined with Artificial Intelligence offers a promising solution. While various Machine Learning (ML) approaches have been explored for ASD diagnosis, Deep Learning (DL) has not previously been applied to web-page interaction eye-tracking datasets. Web page interactions ...
PERFORMANCE ENHANCEMENT OF FLOATING PHOTOVOLTAIC (FPV) SOLAR PANELS VIA SUBMERGED EXTENDED SURFACES Azhari, Jalees Saqib Kamal; Masera, Kemal; Fahrioglu, Murat; Sustainable Environment and Energy Systems (2025-12-29) Climate change and its effect have created a stress on the renewable energy sector to meet increasing demand across the world. Solar PV technology has become a dominant source of energy but losses efficiency in extreme temperatures. Several passive cooling strategies have been developed for solar photovoltaic panels. However, they contribute to uniform temperature distribution enhancing overall system performance. This study proposes enhancement of cooling effect on FloatingSolar PV modules using water subm...
INTEGRATING GENERATIVE AI INTO PROGRAMMING EDUCATION: AN EXPLORATORY STUDY OF STUDENT INTERACTIONS AND LEARNING OUTCOMES güner, hacer; Er, Erkan; Department of Computer Education and Instructional Technology (2026-1-20) This study examines how students interact with ChatGPT in an introductory programming course and how instructional approaches shape their interaction patterns, learning outcomes, and perceptions. Using a mixed-methods design, three integration strategies (unguided use, explicit instruction on effective prompting, and structured scaffolding) were implemented across three in-class practice sessions during a semester. Quantitative data were gathered through a prior knowledge test and post-session quizzes, whil...
FOREIGN POLICY CHANGE AND “NEW NATIONALISM” IN SAUDI ARABIA (2015-2023): A ROLE THEORETICAL APPROACH Battaloğlu, Nesibe Hicret; Altunışık, Meliha; Department of Area Studies (2026-2-4) Since the Arab Uprisings of 2011, the Gulf Cooperation Council (GCC) states have experienced profound political and strategic transformations that increasingly blur the boundaries between domestic governance and foreign policy. This dissertation situates Saudi Arabia at the center of this regional reconfiguration, arguing that the Gulf has emerged as a new center of Arab power following the decline of traditional Arab political hubs. While early Saudi activism after 2011 largely reflected familiar threat pe...
Development of a cross-arm from fiber-reinforced polymer composite angle sections for use in power distribution towers Kılıç, Burak Talha; Baran, Eray; Department of Civil Engineering (2026-1-20) Glass fiber-reinforced polymer (GFRP) composites are increasingly used in critical infrastructure systems due to their high strength-to-weight ratio, corrosion resistance, and ease of installation. However, their anisotropic behavior and complex failure mechanisms make structural design more challenging compared with steel. In this study, a GFRP composite cross-arm was developed for 34.5 kV distribution towers using pultruded angle profiles. Critical loading conditions for the prototype tower were determine...
A DATA DRIVEN FRAMEWORK FOR SURFACE ROUGHNESS PREDICTION IN ADDITIVE MANUFACTURING Erkan, Engin Deniz; Sürer, Elif; Yaman, Ulaş; Department of Data Informatics (2026-1-6) Additive manufacturing is a technology that aims to fabricate three-dimensional objects by adding layers of materials on top of each other. However, the surface quality of objects fabricated via additive manufacturing may vary and be difficult to control. This thesis proposes a machine-learning approach to predict the surface roughness of objects which are additively manufactured. The most important characteristics for forecasting surface roughness are investigated in this study using data analysis and mach...
Autism Through the Lens of Lacanian Psychoanalysis: A Qualitative Study Erten, İrem; Gençöz, Tülin; Canbolat, Fazilet; Department of Psychology (2026-2-4) This dissertation examines autism through a Lacanian psychoanalytic framework, focusing on how regulation, bodily experience, and social linkage are organized in adult autism. Based on in-depth qualitative interviews with autistic adults, the study explores experiences of social relations, sensory sensitivity, masking, and diagnosis. Data were analyzed using reflexive thematic analysis with a theory-informed interpretative approach. The findings show that regulation is sustained through specific arrangement...
MORTALITY SALIENCE AND RISK-TAKING IN DECISION MAKING: CAUSAL AND COGNITIVE MODELLING OF BEHAVIORAL AND NEURAL MECHANISMS Başerdem, Elif Öykü; Yet, Barbaros; Department of Cognitive Sciences (2026-1-14) The replication crisis poses a significant challenge for Terror Management Theory (TMT), particularly regarding the link between Mortality Salience (MS) and risk-taking. While TMT argues that reminders of mortality directly increase risk-taking, empirical findings are inconsistent. This dissertation aims to address these inconsistencies by focusing on the relationship between TMT and risk behavior by modelling the causal and cognitive mechanisms based on a systematic literature review and an empirical study...
A Machine Learning Framework for High-Frequency Midprice Prediction: Feature Engineering, Hyperparameter Space Exploration, and Profit-Loss Evaluation Tiryaki, Barış; Schmidt, Şenan Ece; Department of Electrical and Electronics Engineering (2026-1) This thesis studies short-horizon mid-price direction prediction in high-frequency trading using limit order book (LOB) data from Borsa Istanbul. A machine learning framework based on XGBoost is proposed to predict whether the mid-price will move up, stay the same, or move down over a short time horizon. A new feature called Effective Q-Price (EQP) is introduced in the scope of the thesis to better represent market liquidity. EQP combines price and quantity information across multiple depth levels and can b...
Wasserstein distributionally robust optimization reformulations for wholesale and local energy market operations Karabaş, Tolga; Tural, Mustafa Kemal; Peker Sarhan, Meltem; Department of Industrial Engineering (2026-1-15) The increasing penetration of intermittent renewable energy sources (RESs) introduces substantial uncertainty into both wholesale and local electricity markets, necessitating decision-making frameworks that are robust against distributional ambiguity. This thesis develops novel Wasserstein distributionally robust optimization reformulations for market clearing and bidding problems across multiple market layers. These reformulations encompass distributionally robust objective functions, chance constraints, a...
REQUIEM FOR THE #THISFLAG MOVEMENT IN ZIMBABWE Tarambwa, Aswad Nyasha; Çırakman Deveci, Aslı; Department of Political Science and Public Administration (2026-2-2) Zimbabwe has long been plagued by cycles of instability, and conditions have arguably worsened in the post-Mugabe era. This thesis investigates the causes, nature and degree of the instabilities and contradictions in Zimbabwe’s state-building from the perspective of a social movement, seeking to reinvigorate debates on statebuilding. Notably, the literature overlooks the nexus between state-building and social movements in understanding Zimbabwean politics. Hence, framed as a requiem, this thesis reflects o...
MULTI-STEP NEURAL NETWORK BASED SYSTEM IDENTIFICATION AND NMPC FOR AN UNDERACTUATED UNMANNED SURFACE VEHICLE Yıldırım, Mustafa; Ankaralı, Mustafa Mert; Department of Electrical and Electronics Engineering (2026-1-22) This thesis focuses on learning a dynamics model for an underactuated 3-DOF unmanned surface vehicle (USV) using neural networks and deploying the learned model inside nonlinear model predictive control (NMPC). Physics-based maneuvering models provide useful structure, but accuracy can be affected by parameter uncertainty, noisy measurements, and actuator behavior. In real operation, the USV dynamics depend on current velocity and the actual thrust, while the available signals are noisy velocity measuremen...
COLLABORATION FOR PRIVATE SECTOR FINANCING: UN AND PRIVATE SECTOR PERSPECTIVES IN TÜRKİYE Bülbül, Rabia; Aybars, Ayşe İdil; Department of Social Policy (2026-2-2) The United Nations has been instrumental in supporting governments, civil society organizations and communities at international, national and subnational levels in cooperation with its stakeholders to achieve sustainable development. Its programmes and interventions designed to deliver results for supporting vulnerable people and systems strengthening are funded mostly by public donor countries for financing international development. However, given the recent sharp budget cuts in public funds due to finan...
DEPOLITICIZATION, REPOLITICIZATION, AND THE CLASS DYNAMICS OF FINANCIALIZATION: THE CASE OF AKP-ERA TURKEY AND THE ROLE OF CBRT Çelik, Furkan Enes; Birler, Reşide Ömür; Department of Political Science and Public Administration (2026-1-30) This thesis examines the Justice and Development Party (AKP) period in power (2002-2023), the relationship between the Central Bank of the Republic of Turkey (CBRT) and the AKP during this period, and the transformation of monetary policy in this context from the perspective of Critical Political Economy and Open Marxism. The study argues against mainstream approaches that emphasize the central bank's independence discourse, maintaining that central bank independence is shaped by class dynamics. The thesis ...
Enhancement of Demand Forecasting for Agrochemical Products Through Advanced Analytics Kaya, Gizem; Eren, Pekin Erhan; Department of Data Informatics (2026-1-20) Demand forecasting is an essential part of supply chain planning. Accurate prediction of sales directly affect the resource efficiency and success of inventory management process. However it is especially challenging for some business domains, including agriculture, due to strong seasonal patterns, fluctuating demand drivers, and market uncertainty. This study searches for the enhancement of demand forecasting for agrochemical products by applying machine learning and deep learning algorithms, including mul...
Various Aspects of Compact Objects and Black Holes in Extended Theories of Gravity Çelik, Ufuk Can; Tekin, Bayram; Keles, Ahmet; Department of Physics (2025-12-24) In the study of response of gravitational objects to tidal fields, the tidal Love numbers are introduced as linear response coefficients. We study the tidal deformability of gravitational objects such as neutron stars and black holes both in General Relativity and higher curvature metric theories of gravity, e.g. Einstein-Gauss-Bonnet theory. We also briefly discuss gravity in diverse dimensions and calculate tidal Love numbers in this limit.