Browsing OzU Theses & Dissertations by Author "Demiroğlu, Cenk"
Now showing items 1-20 of 38
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Adaptive MIMO free space optical communication systems
Free space optical (FSO) enjoys the high data rate of optical spectrum and have also the flexibility of RF links. FSO systems provide many advantages to the line of sight wireless communication technology. With the recent ... -
Advisor: an adaptive framework for test oracle automation of visual output systems
Genç, Ahmet Esat (2019-01-10)Test oracles differentiate between the correct and incorrect system behavior. Automation of test oracles for visual output systems mainly involves image comparison, where a snapshot of the observed output during test is ... -
Applications of time-series methods in electricity price forecasting
Ülgen, Toygar (2021-01-18)The prediction of day-ahead electricity prices with higher accuracy is always helpful for the market players of the power exchange. Models were designed in the first place to find out the best time-series estimation method ... -
Channel modeling for vehicular visible light communication
The demand for vehicular communication systems has increased since they are considered the key enabling technology for Intelligent Transportation Systems (ITSs). Vehicular communications allow information sharing between ... -
Channel modelling and characterization for visible light communications
Sarbazi, Elham (2014-08)Visible light communications (VLC) involve the dual use of illumination infrastructure (i.e., LEDs) for wireless communication purposes. Despite the growing academic and industrial interest, there is a lack of realistic ... -
Coded continuous phase modulation for tactical communications
Foruhandeh, Mahsa (2014-08)Satisfying the various demands of tactical transceivers is one the common challenges in military communications. Different modulation, coding and spread spectrum techniques are needed to meet these requirements. Although ... -
Comparison of text-independent speaker verification systems in a multi-class, semi-automatic detection scenario
Yeşil, Fatih (2013-06)Performance of the speaker veri cation systems is typically measured based on their binary decision accuracy. Soft outputs of the systems are used mostly for calibration or multiple system combination purposes. However, ... -
Design and quantitative analysis of a pulse wave velocity blood-pressure measurement subsystem with multiple-subject controlled experiments
Erkurşun, Burcu (2018-08)The main purpose of this study is to perform the pulse wave velocity (PWV) measurements with a new noninvasive optoelectronic continuous-time wearable sensor design and analyze the quantitative relation between the reference ... -
Development of the calibration scheme and system integration of the Ozyegin biopsy robot (OBR)
Ahmad, Mirza Awais (2016-08)Imaging systems can fail to visualize cancerous tissues for proper diagnosis. Needle based procedures, like biopsies, increase the chances of accurate diagnosis of tumors. These procedures also have applications in minimally ... -
Development of various corner-lit backlighting concepts in an advanced smart LED TV
Karslı, Kıvanç (2015-01)CCFL (Cold Cathode Florescent Lamp) based LCD (Liquid Crystal Display) TVs are replaced by Smart LED TVs with the help of recent improvements of the LED (Light Emitting Diode), electronics and information technologies. ... -
Diversity techniques for ultraviolet communications
Ardakani, Maryam Haghighi (2016-08)Strong molecular and aerosol scattering in ultraviolet (UV) wavelengths enable mechanisms where transmitter can communicate with the receiver in the absence of line of sight (LOS) link. Recent advances in solid state ... -
Diversity-multiplexing tradeoff for network coded cooperative OFDMA systems
Heidarpour, Ali Reza (2016-08)Cooperative communication (CC) exploits the broadcasting nature of wireless transmission and creates a distributed multiple-input multiple-output (MIMO) system among the wireless nodes which are physically separated from ... -
Enhanced unipolar OFDM based relay-assisted visible light communications
Gerard, Djengomemgoto (2016-08)Due to spectrum scarcity of the conventional radio frequency (RF) and the higher demand for wireless services, visible light communication (VLC) has emerged as a complementary solution to RF technology for ubiquitous ... -
Experimental analysis of RF based multi plane diffraction with over the air active cellular signal measurements
Aytekin, Ali (2021-01-13)In our study, mathematical modelling of single-plane diffraction (SPD) and multi-plane diffraction (MPD) architectures based on RF waves is created as theoretical. Free space, SPD and MPD based experimental studies are ... -
Experimental analysis of the impact of the refrigerator components on conducted electromagnetic interference
As the number of electronic devices in our daily lives increases day by day, the risk of electromagnetic interference (EMI) between the devices and between the device and the grid increases. Refrigerators are the only ... -
Experimental impact analysis of the refrigerator cable design on disturbance power test
The ever-increasing variety of electronic products brings with it many tests and controls. Especially for a product such as a refrigerator, which has an important place in the lives of users and works non-stop for almost ... -
Gyroscopes based on acoustic waveguides
Çetin, Hakan (2016-08)We propose novel gyroscope architectures based on acoustic waves propagating in a waveguide. This thesis is composed of two parts. In the first part, the fundamentals of the proposed gyroscope are discussed. The new gyroscope ... -
A hybrid statistical/unit-selection text-to-speech synthesis system for morphologically rich languages
Güner, Ekrem (2013-06)Two most prominent examples of Text-to-Speech (TTS) systems are Unit Selection based TTS (UTTS) and the Hidden Markov Model (HMM) based TTS (HTTS). UTTS has been the dominant approach of the last decade while HTTS has been ... -
Intelligent information gathering for open world policy reasoning
Büyükyıldız, İrfan Can (2015-08)Sistem politikaları her birimin kendi hedeflerine ulaşmaya çalıştığı çoklu etmen sistemlerinde önemli bir rol oynamaktadır. Politikalar ve ilgili mekanizmalar birimlerin kötü niyetli ve istenmeyen faaliyetlerini engellemek ... -
An investigation into junction temperature of green and blue LEDs
Özlük, Burak (2019-01-04)As more advanced technologies are developed, energy considerations are becoming more serious. This is also true for lighting systems that play a crucial role in worldwide energy consumption consisting of 15% of general ...
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