Ph.D. Theses: Recent submissions

  • Model driven security framework for software design and verification 
    Deveci, Engin. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    Information system security is receiving increasing attention every day because a security problem can cause serious nancial loss or even loss of lives. Some of these security problems occur as a result of poor design ...
  • Tensor fusion: learning in heterogeneous and distributed data 
    Şimşekli, Umut. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    In this thesis, we focus on coupled matrix and tensor factorization models; that provide a good modeling accuracy { practicality trade o for modeling large-scale and/or heterogeneous data that are collected from diverse ...
  • Bayesian changepoint and time-varying parameter learning in regime switching volatility models 
    Yümlü, Mustafa Serdar. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    This dissertation proposes a combined state and piecewise time-varying parameter learning technique in regime switching volatility models using multiple changepoint detection. This approach is a Sequential Monte Carlo ...
  • Computer aided detection of spina bifida using features derived from curvature scale space and zernike moments 
    Konur, Umut. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    The work of this dissertation focuses on a specifc computer aided diagnosis (CAD) problem, although the main concept can be generalized to similar problems. Our aim is to detect the presence of the spina bi da (open spine) ...
  • Analysis of reception process for an absorbing receiver in molecular communication via diffusion 
    Akkaya, Ali. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    Nanotechnology is currently being applied to vast number of elds to overcome the challenges faced with existing technologies that cannot e ciently scale down to nano level. However, considering the limited processing and ...
  • Robust machine learning methods for computational paralinguistics and multimodal affective computing 
    Kaya, Heysem. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    The analysis of a ect (e.g. emotions or mood), traits (e.g. personality), and social signals (e.g. frustration, disagreement) are of increasing interest in human computer interaction, in order to drive human-machine ...
  • Reconfigurable network-on-chip (NoC) architectures for embedded systems 
    Bayar, Salih. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    Communication architectures such as Point-to-Point (P2P) and shared bus are poorly scalable as the number of cores or the communication volume increase. Networkon- Chip (NoC) has been proposed to reduce power consumption ...
  • Tuning model complexity using cross-validation for supervised learning 
    Yıldız, Olcay Taner. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2005., 2005.)
    In this thesis, we review the use of cross-validation for model selection and propose the MultiTest method which solves the problem of choosing the best of multiple candidate supervised models. The MultiTest algorithm ...
  • Case-based mobile manipulation 
    Meriçli, Tekin. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    The ability to manipulate the environment is one of the primary skills that autonomous mobile service robots are expected to have, considering that the daily lives of humans heavily rely on this skill. There are various ...
  • Human activity recognition with wireless sensor networks using machine learning 
    Alemdar, Hande. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    Recognizing human behavior in an automated manner is essential in many ambient intelligence applications such as smart homes, health monitoring applications and emergency services. In order to make such long term health ...
  • An issue recommender model using the developer Collaboration network 
    Çağlayan, Bora. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Assignment of new issues to developers is an important part of software maintenance activities. In this research, we build an issue recommendation model that recommends new issues to developers and highlights the defect ...
  • An efficient evolutionary clustering and prediction model for gene expression time series data 
    Erdem, Atakan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Because of using manual methods in some parts of gene expression experiments, reliability of the data is low. If this data is directly utilized as input to a data mining algorithm or a model for evaluating gene expression ...
  • Cooperative sensing scheduling strategies for Cognitive Radio networks 
    Eryiğit, Salim. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    In this thesis, our main focus is on cooperative sensing scheduling (CSS) for cognitive radio networks (CRNs). We first consider the joint scheduling of sensing and transmission for a multi-channel CRN with varying sensing ...
  • Thread vulnerability for multicore architectures 
    Öz, Işıl. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    Continuously reducing transistor sizes and aggressive low power operating modes employed by modern architectures tend to increase transient error rates. A metric of reliability is required in order to evaluate approaches ...
  • Multi-view feature extraction based on canonical correlation analysis 
    Şakar, Cemal Okan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Canonical Correlation Analysis (CCA) aims at identifying linear dependencies between two sets of variables. CCA has recently become popular in the eld of machine learning with the increase in the number of multi-view ...
  • Generating, ranking, and enacting commitment protocols 
    Günay, Akın. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    Multiagent systems o er novel techniques to solve computational challenges that involve data interpretation, reasoning and decision making, without human intervention. An important aspect of every multiagent system is ...
  • Three dimensional face recognition under occlusion variance 
    Alyüz, Neşe. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    With advances in sensor technology, three dimensional (3D) face has become an emerging biometric modality, preferred especially in high security applications. However, dealing with occlusions covering the facial surface ...
  • Distributed simulation framework based on load balanced implementation of standard clock algorithm with web based extensions 
    Darcan, Osman Nuri. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2003., 2003.)
    Standard Clock approach is used to simulate a number of parametric variants of a single system. In this thesis, a simulation engine based on the distributed implementation of the Standard Clock approach on networks of ...
  • Energy efficiency analysis and modeling of cognitive and heterogeneous wireless networks 
    Gür, Gürkan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    The surging energy costs and the environmental consequences of energy generation and exploitation have put energy e ciency aspect of wireless systems into focus in an unprecedented manner. Moreover, the capacity expectations ...
  • Real-time human hand pose estimation and tracking using depth sensors 
    Kıraç, Mustafa Furkan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    The human hand has become an important interaction tool in computer systems. Using the articulated hand skeleton for interaction was a challenge until the development of input devices and fast computers. In this thesis, ...

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