Browsing Ph.D. Theses by Title

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  • Realization and analysis of high performance physical unclonable functions based on ring oscillators 
    Kömürcü, Giray. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Physical Unclonable Functions (PUFs) are powerful techniques that are proposed recently to address security related problems. They have a wide range of applications including cryptographic key generation and storage, ...
  • Realization and modeling of water-gated field effect transistors (WG-FET) using 16-NM-THICK single crystalline silicon film and their circuit applications 
    Sönmez, Bedri Gürkan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    This thesis covers realization and modeling of novel water-gated field effect transistors (WG-FETs) which use 16-nm-thick single crystalline silicon lm as active layer. WG-FET devices utilize electrical double layer ...
  • Realization of two dimensional MEMS based displays using polymer composite micro-scanners integrated with one dimensional polymer LED arrays 
    Gökdel, Yiğit Dağhan. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    A novel type of displays are realized by hybrid and monolithic integration of optoelectronic devices with micro electro mechanical systems (MEMS). MEMS platform, with mechanical quality factor (20-50 in air) enhanced ...
  • Reconfiguring sliding-mode controller for underwater vehicles 
    Demirci, Ufuk. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2004., 2004.)
    The challenging control problem of underwater vehicles is addressed in this study under excessive sea wave disturbances at shallow submerged operation. The systems are becoming more and more complex with the effect of rapid ...
  • Ring oscillator based randon number generators 
    Güler, Ülkühan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    System-on-a-chip solutions require hardware based integrated circuit (IC) random number generator (RNG) for trustworthy transmission of information. Fully digital gate based IC RNGs became popular because of their uncomplicated ...
  • Robust ultra-wideband tranceiver integrated circuit design 
    Batur, Okan Zafer. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    Pulse-based wideband and UWB radios are well known for their use in radar technology. UWB has also been popular for its use on high data rate applications in recent years. UWB wireless sensor networks are known for their ...
  • Security and privacy analysis of authentication protocols in RFID systems 
    Ergüler, İmran. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    Radio Frequency IDentification (RFID) technology continues to flourish as an inherent part of virtually every ubiquitous environment. However, it became clear that the public— implying the industry— seriously needs mechanisms ...
  • Sensitivity theory application to the numerical solutions of the general optimal control problem 
    Eksin, İbrahim. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1983., 1983.)
    This study proposes various efficient numerical methods for the general optimal control problem. The basic feature of the methods developed here is that they somehow exploit the ideas and the concepts of the sensitivity ...
  • Sequential Bayesian modeling of non-stationary non-Gaussian processes 
    Gençağa, Orhan Deniz. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    This thesis brings a unifying approach for modeling non-stationary non-Gaussian signals which are widely encountered in many multidisciplinary research fields. In the literature, different approaches have been used to model ...
  • Single-channel speech-music separation for robust ASR with mixture of NMF models 
    Demir, Cemil. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    In this dissertation, we analyze the single-channel speech-music separation problem for automatic speech recognition (ASR). The motivation of the study is to increase the performance of the ASR systems by decreasing the ...
  • Solutions to restrictions of the current conveyor based circuits 
    Yüce, Erkan. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2006., 2006.)
    Current conveyor (CC) is one of the most widely used versatile active components. It potentially provides higher accuracy, wider bandwidth, greater linearity and larger dynamic range. The advantages of the CCs have brought ...
  • Sparse signal recovery from incomplete and perturbed data 
    Şenyuva, Rıfat Volkan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    Sparse signal recovery consists of algorithms that are able to recover undersampled high dimensional signals accurately. These algorithms require fewer measurements than traditional Shannon/Nyquist sampling theorem demands. ...
  • Split ring resonators in microwave regime for sensing of reagents in aqueous solutions 
    Çamlı, Berk. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2020., 2020.)
    In this thesis, design, fabrication, and characterization of different microwave band split ring resonator-based sensors used for sensing of glucose in aqueous solu tions are presented. Following an introduction to ...
  • Stable - matching based resource allocation methods in wireless communication systems 
    Sabuncu Sandal, Yağmur. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2019., 2019.)
    As the number of smart devices increases day by day, the need for new resource allocation techniques also increases. 5G technologies such as Long-Term Evolution Advanced (LTE-A), carrier aggregated heterogeneous networks ...
  • Standard cell all-digital phase locked loop design, analysis and high-level synthesis 
    Balcıoğlu, Yalçın. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    This thesis presents a new quantization noise suppression method for a timeto- digital Converter (TDC) and proposes an all-digital phase locked loop (ADPLL) architecture using only standard cell logic gates. Using new ...
  • Statistical and discriminative language modeling for Turkish large vocabulary continuous speech recognition 
    Arısoy, Ebru. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    Turkish, being an agglutinative language with rich morphology, presents challenges for Large Vocabulary Continuous Speech Recognition (LVCSR) systems. First, the agglutinative nature of Turkish leads to a high number of ...
  • Stochastic adaptive receding horizon controllers 
    Yaz, Engin. (Thesis (Ph.D)- Bogazici University. Institute for Graduate Studies in Science and Engineering, 1982., 1982.)
    In this thesis, the deterministic, stochastic and stochastic adaptive coritrolpossibilities based on the method of receding horizon is examiried. The receding horizon method assumes a fixed horizon length for feedback law ...
  • Structured and sequential representations for human action recognition 
    Çeliktutan, Oya. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    Human action recognition problem is one of the most challenging problems in the computer vision domain, and plays an emerging role in various elds of study. In this thesis, we investigate structured and sequential ...
  • Study of evaporated amorphous silicon films by frequency dependent conductivity and phase shift analysis of modulated photocurrent methods 
    Çil, Celal Zaim. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1989., 1989.)
    A.c. and d.c. conductivity measurements have been performed on amorphous silicon films produced by electron gun evaporation. The a.c. measurements have been performed at frequencies between 100 Hz and 2 MHz, and at ...
  • Supervised, semi-supervised and unsupervised methods in discriminative language modeling for automatic speech recognition 
    Dikici, Erinç. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    Discriminative language modeling aims to reduce the error rates by rescoring the output of an automatic speech recognition (ASR) system. Discriminative language model (DLM) training conventionally follows a supervised ...

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