Graduate School of Natural and Applied Sciences

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Recent Submissions

A virtual panopticon in Turkey during the COVID-19 pandemic: The case of location-based mobile application 'Hayat Eve Sığar' Tükenmez, Başak; Karakaş, Bilge (2022-03-01) Based on Jeremy Bentham's panopticon design (1785) as the architectural manifestation of surveillance, Foucault theorizes how modern societies are built upon the relationship between power and knowledge operated by surv...
STABILITY AND FAILURE ANALYSIS OF EXCAVATIONS USED FOR UNDERGROUND MINING OF BATI RAMAN OIL FIELD Emci, Mehmet Emircan; Öztürk, Hasan; Department of Mining Engineering (2021-11-8) Batı Raman holds the Turkey's proven largest oil reserve (1.85 billion barrels). The reserve is located at an average depth of 1450 m within a fractured limestone. This heavy oil has a 12° API gravity and a viscosity of 20...
PrimePatNet87: Prime pattern and tunable q-factor wavelet transform techniques for automated accurate EEG emotion recognition Doğan, Abdullah; Akay, Merve; Barua, Prabal Datta; Baygin, Mehmet; Dogan, Sengul; Tuncer, Turker; Doğru, Ali Hikmet; Acharya, U. Rajendra (2021-11-01) © 2021 Elsevier LtdNowadays, many deep models have been presented to recognize emotions using electroencephalogram (EEG) signals. These deep models are computationally intensive, it takes a longer time to train the model. ...
Investigation of the effects of uncertainties of inflow hydrograph and dam breach geometry on outflow hydrograph Gödek, Neslihan Pınar; Yanmaz, Ali Melih; Çalamak, Melih; Department of Civil Engineering (2021-11) Precise breach outflow hydrograph is crucial for the accurate determination of the flood damage and cost at the downstream region. Precise flood inundation modeling is based on the use of a realistic breach outflow hydrogr...
DELAYED DETACHED-EDDY SIMULATION BASED PREDICTIONS OF BOUNDARY LAYER TRANSITION AND CAVITY FLOW NOISE Yalçın, Özgür; Özyörük, Yusuf; Department of Aerospace Engineering (2021-11-1) This dissertation investigates the boundary layer transition as well as the cavity flow noise prediction capabilities of a high-order in-house solver using various Delayed Detached-Eddy Simulation (DDES) frameworks. Before...
Improvement of silicon heterojunction solar cell performance with new surface structure and wide band gap carrier selective layers Dönerçark, Ergi; Turan, Raşit; Yerci, Selçuk; Department of Micro and Nanotechnology (2021-10-15) The photovoltaic (PV) industry is dominated by silicon-based solar cells owing to the abundance of silicon and its full-fledged technology. The main road for the PV industry points out to enhance the conversion efficiency ...
AN ANALYSIS ON THE EFFECT OF DYNAMIC RANGE ON OBJECT DETECTION WITH DEEP NEURAL NETWORKS Koçdemir, İsmail Hakkı; Kalkan, Sinan; Alatan, Abdullah Aydın; Department of Computer Engineering (2021-10-8) An important problem in computer vision, particularly in object detection, is being able to perceive objects even under challenging illumination conditions. Being robust to such conditions is especially important in applic...
AN INTEGRATED COMPUTATIONAL FRAMEWORK FOR NATURAL VENTILATION AND AIRBORNE CONTAMINANT DISPERSION ANALYSIS IN ARCHITECTURAL DESIGN Abbas, Günsu Merin; Gürsel Dino, İpek; Department of Architecture (2021-10-8) Over the last four decades, the negative impact of the building industry and the growing environmental crisis have led architects to develop sustainable design strategies for a better-performing built environment. Building...
Quantum Search in Sets with Prior Knowledge Çalıkyılmaz, Umut; Turgut, Sadi; Department of Physics (2021-10-7) Quantum search algorithm revolutionized the field by reducing the complexity significantly for the search problem. However, by not being able to decrease the complexity to logarithmic scales, this algorithm still needs a s...
A study on the behaviour of offshore suction bucket foundations under cyclic axial compressive loading Yilmaz, S. Alp; TAŞAN, HACI ERCAN (2021-10-01) Suction bucket foundations of offshore wind turbines (OWTs) are subjected to cyclic loads induced by wind and waves. The behaviour of buckets embedded in saturated sandy soil subjected to cyclic axial compression was studi...
The Mutual Construction of Heritage and Emergency: Neo-Ottomanist Heritage Policies in 2010s' Turkey Aykaç Leıdholm, Pınar (I.B.Tauris, 2021-10-01)
A quick look to the use of time domain nuclear magnetic resonance relaxometry and magnetic resonance imaging for food quality applications Özel, Barış; Öztop, Halil Mecit (2021-10-01) © 2021 Elsevier LtdEvaluation of food quality in industrial production is a major interest. Fast, reliable, cost-effective and easy-to-use applications are required for on-line inspection of food products. With the recent ...
Characterization of Pectin-Based Gels: A 1H Nuclear Magnetic Resonance Relaxometry Study Beira, Maria J.; Öztop, Halil Mecit; Sebastião, Pedro J. (2021-10-01) © 2021 American Chemical Society.Rare sugars are monosaccharides and their derivatives that are not commonly found in nature. d-Allulose is a rare sugar that is C-3 epimer of fructose and presents an alternative to sucrose...
Design, analysis and experimental study of a novel side thorax impactor to be used in pedestrian protection tests for flat front vehicles Saraç Karadeniz, Sevgi; Gökler, Mustafa İlhan; Department of Mechanical Engineering (2021-10) Pedestrian protection is crucial and the vehicle manufacturers put more and more effort to make vehicles safer for pedestrians in case of pedestrian involved accidents. Injuries and fatalities are very frequent and severe ...
Questioning endurance through the interruptions on urban memory: Konak SSK Blocks Karakaş, Bilge; Canaran, Deniz; Yılmaz, Ebru (2021-09-30) Konak Square has been evolved for centuries and reached today’s spatial configuration, especially with surrounding administrative, institutional, cultural, and commercial structures obtained by architectural competitions...
BROADBAND HIGH EFFICIENCY RF POWER AMPLIFIER DESIGN BASED ON MODIFIED CLASS-J APPROACH WITH APPLICATIONS USING GAN HEMT TECHNOLOGY Koç, Murat; Demir, Şimşek; Department of Electrical and Electronics Engineering (2021-9-29) RF power amplifiers have been the essential elements of any transmit/receive block. Especially in the transmit chain, some applications require high RF power, such as radar, jammer, telecommunication signals targeting a wi...
PREPARATION OF MULTILAYER CAPSULES CONTAINING DODECAHYDRO-CLOSO-DODECABORATE LOADED POLYMER MICELLES Aydemir, Umut; Erel Göktepe, İrem; Akdağ, Akın; Department of Biochemistry (2021-9-24) Boron Neutron Capture Therapy (BNCT) is a non-invasive radiotherapy technique which is based on delivery of non-radioactive 10B compounds to cancer cells and irradiation of the tumour tissues with low energy thermal neutro...
ALL SIC TRACTION CONVERTER FOR LIGHT RAIL TRANSPORTATION SYSTEMS: DESIGN METHODOLOGY AND DEVELOPMENT OF A 500 - 900 VDC, 165 KVA PROTOTYPE YILDIRIM, Doğan; Ermiş, Muammer; Department of Electrical and Electronics Engineering (2021-9-24) Design methodology and development of a 165 kVA, all-silicon carbide (SiC) traction converter for new generation light rail transportation systems (LRTS) have been carried out in this thesis. Electrical, mechanical, and th...
ESTIMATION OF STATOR RESISTANCE OF INDUCTION MOTOR USING INNOVATION BASED ADAPTIVE EXTENDED KALMAN FILTER Yırtar, Mehmet Zeki; Bostancı Özkan, Emine; Ertan, Hulusi Bülent; Department of Electrical and Electronics Engineering (2021-9-24) In the industry, induction motors are widely utilized due to their low cost and low maintenance requirements. To get better performance from the motor, vector control (FOC) is introduced in the last decades. In this thesis...
REAL TIME CALCULATION OF SHEM ANGLES BY METAHEURISTIC ALGORITHMS FOR VARIABLE FREQUENCY MOTOR DRIVES NALÇACI, Gamze; ERMİŞ, Muammer; ÇADIRCI, Işık; Department of Electrical and Electronics Engineering (2021-9-23) Harris hawks optimization (HHO) has been used to optimize a voltage source inverter's selective harmonic elimination method (SHEM) for light rail transportation. The primary goal of SHEM's pulse-width modulation strategy i...

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