Başlık için Ph.D. Theses listeleme

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  • Broadband power-line noise modeling and compensation 
    Güzel, Tayyar. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    Broadband power-line communication (BPLC) has become more popular in the Smart Grid context as it allows broadband access, media sharing, automated meter reading etc. However, it still remains as a challenging task to ...
  • Channel polarization with higher - order memory 
    Afşer, Hüseyin. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    Channel coding is one of the most fundamental problems regarding the nature of communication. Polar codes, developed by Ar kan, were the rst demonstration of practical channel codes that provably achieve theoretical limits ...
  • Circuit level analog design automation 
    Sönmez, Özsun Serkan. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2010., 2010.)
    This thesis presents a simulation-based analog circuit synthesis methodology, its integration with system and layout level analog synthesis tools, and synthesis examples that were performed to validate the usefulness of ...
  • CMOS based optoelectronic catheter localization system for magnetic resonance imaging environment 
    Sarıoğlu, Baykal. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    The use of minimally invasive medical techniques has greatly reduced risks to patients and has increased our understanding of how the body works. Detection of catheters is one of the most important tasks in these techniques. ...
  • Consensus based power control algorithms for heterogenous networks 
    Şenel, Kamil. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    The resource allocation problem is crucial for unveiling the potential of heterogeneous networks. The demand for higher data rates from an increasing number of devices compels the operators to look for solutions beyond the ...
  • Content based medical image retrieval 
    Marvasti, Neda Barzegar. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    Fast technological developments of di erent medical imaging and data collection techniques increase the expectation of more accurate interpretations and diagnoses of radiologists. However, to carefully analyze the resulting ...
  • Convergence rate analysis and optimization of distributed consensus algorithms 
    Cihan, Onur. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    The problem of achieving a common value in a distributed information sharing context, referred to as distributed consensus or agreement, is an important topic that has drawn significant research attention of late. Consensus ...
  • Cross-lingual voice conversion 
    Türk, Oytun. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    Cross-lingual voice conversion refers to the automatic transformation of a source speaker’s voice to a target speaker’s voice in a language that the target speaker can not speak. It involves a set of statistical analysis, ...
  • Current-model CMOS sequential multiple-valued logic circuits 
    Sarıca, Fatma. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    The use of circuits with more than two logic levels, named as Multiple-Valued Logic (MVL) circuits, have a potential for reducing chip area consumed by interconnection wiring and functional units in Very-Large Scale ...
  • DDoS attack detection using signal processing and statistical approaches 
    Erhan, Derya. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2021., 2021.)
    DDoS attacks cause a variety of changes in the properties of the attributes in the network traffic. Modeling these changes using signal processing and statistical ap proaches provides detection of these attacks. This thesis ...
  • Density-based shape descriptors and similarity learning for 3D object retrieval 
    Akgül, Ceyhun Burak. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    Next generation search engines will enable query formulations, other than text, relying on visual information encoded in terms of images and shapes. Content-based retrieval research aims at developing search engines that ...
  • Design aspects of discrete time chaos based true random number generators 
    Çiçek, İhsan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    In this thesis, design aspects of discrete time chaos based cryptographic grade TRNGs are studied starting from chaotic map equations to in depth analyses of the generated entropy. Custom mathematical models of discrete ...
  • Design of high efficiency switching converters for mobile applications 
    Ozanoğlu, Kemal. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2020., 2020.)
    High power efficiency is a key design specification in mobile applications, mainly to increase battery life. To answer this need, switching converters are preferred in such applications to convert the battery voltage to ...
  • Design of low noise CCII based current mode circuits to be used in high frequency applications 
    Arslan, Emre. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2010., 2010.)
    High performance analog circuits need to be modified according to modern telecommunication needs such as higher frequency (GHz regions), low power, low voltage, low noise and higher relative dynamic range. The attractive ...
  • Design of multidimensional perfectreconstruction filter banks with compression applications 
    Celasun, Işıl. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1996., 1996.)
    The acoustics, vibration, tacho voltage (tacho is a part of the universal motor used to get a feedback from the motor to control the speed), feeding voltage and the supply current signals reflect the health of the motor. ...
  • Design, fabrication and characterization of micromachined THz absorbers 
    Mamaghani, Ayda. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2020., 2020.)
    The purpose of this research is to develop a new class of THz absorbers for imaging and sensing applications that can provide improved functionality and perfor mance. These absorbers consist of periodic arrays of layered ...
  • Development of a high level synthesis tool specialized on fir-based multirate systems 
    Yurdakul, Arda. (Thesis (Ph.D.)- Bogazici University. Institute for Graduate Studies in Science and Engineering, 1999., 1999.)
    Digital Signal Processing (DSP) is the most studied area in design automation, because it is one of the most well-established branches of electrical engineering for several years. In the last few years, it is stimulated ...
  • Development of new learning algorithms for spiking neural networks 
    Öniz, Yeşim. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    The main shortcomings with the gradient descent-based learning algorithms used for neural networks are that the convergence speed is relatively slow and the algorithm can be easily trapped into a local optimum. The studies ...
  • Distributed group consensus in multi - agent networks 
    Erkan, Özlem Feyza. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    Recent advances in computing and communication technologies have led to considerable progress in multi-agent networks. A variety of applications ranging from social networks to intelligent transportation systems makes the ...
  • Electronic tunability in analog filters 
    Metin, Bilgin. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    In the beginning years of the analog design, discrete components were being used in the analog design procedures. After manufacturing, trimmer capacitors and potentiometers were used for electronic tunability to compensate ...

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