Ph.D. Theses: Recent submissions

  • Automated reasoning on exceptions in commitment-based multiagent systems 
    Kafalı, Remzi Özgür. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    Exceptions constitute a signi cant portion of people's lives. When things do not go as planned, due to environmental reasons or because one does not bring about his responsibility in a given task, unexpected situations ...
  • Detection quality measure in surveillance wireless sensor networks 
    Komar, Can. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    The performance of a surveillance wireless sensor network is generally measured with its detection capability which is affected by various parameters such as the sensor count, the sensor range, the area width and the target ...
  • Efficient mapping of ADAS (Advanced driver assistance system) algorithms onto multicore architectures 
    Par, Kerem. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    This thesis aims to address the real-time performance requirements of ADAS (Advanced Driver Assistance System) and autonomous vehicle applications on emerging multicore CPU and manycore GPU architectures. A parallel particle ...
  • Modelling software reliability using Hybrid Bayesian networks 
    Tosun, Ayşe. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    In this research, we analyse the problem of predicting software reliability from AI perspective. We observe that existing models are built based on expert knowledge including de ning a set of metrics through surveys and ...
  • Improving performance of defect predictors using confirmation bias metrics 
    Çalıklı, Handan Gül. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2012.)
    Software defect prediction models help managers to prioritize their testing effort. Algorithms, which are used to learn defect predictors, have reached a ceiling such that further improvements may only come from increasing ...
  • A scheduling model for centralized cognitive radio networks 
    Gözüpek, Didem. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    In this thesis, we present a scheduling model for centralized cognitive radio networks. Our model consists of a set of schedulers that focus on the data transmission of the secondary users and determine with which frequency, ...
  • Channel selection and assignment schemes for efficient spectrum sharing and energy efficiency in cognitive radio networks 
    Bayhan, Suzan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    In this thesis, we focus on distributed channel selection and centralized channel assignment in cognitive radio networks (CRN). For the former topic, we are concerned with the efficiency of spectrum sharing whereas in the ...
  • Evolutionary algorithms for solving DEC-POMDP problems 
    Eker, Barış. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    The Decentralized Partially Observable Markov Decision Process (DEC-POMDP) model addresses the multiagent planning problem in partially observable environments. Due to its NEXP-complete complexity, only small size problems ...
  • Cooperative spectrum sensing and radio environment map construction in cognitive radio networks 
    Yılmaz, Hüseyin Birkan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    In this thesis, we focus on both internal and external sensing in Cognitive Radio (CR) networks. In internal sensing, individual CRs discover spectrum opportunities via spectrum sensing whereas in external sensing, an ...
  • Application of the 3G PCS technologies to the mobile subsystem of the next generation tactical communications systems 
    Çayırcı, E. (Erdal) (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1999., 2000.)
    The advances in high-speed computations, multimedia and wireless communications promise new opportunities to develop more robust and agile battlefield communications systems. However, there are some major distinctions ...
  • Generalized tensor factorization 
    Yılmaz, Yusuf Kenan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    This thesis proposes a unified probabilistic framework for modelling multiway data. Our approach establishes a novel link between probabilistic graphical models and tensor factorization, that allows us to design arbitrary ...
  • Integrating morphology into automatic speech recognition: morpholexical and discriminative language models for Turkish 
    Sak, Haşim. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    Languages with agglutinative or in ectional morphology have proven to be challenging for speech and language processing due to relatively large vocabulary sizes leading to a high number of out-of-vocabulary (OOV) words. ...
  • Core-crust modeling approach for formal representation of trust in relation to computer security 
    Bahtiyar, Şerif. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    The increasing availability of high bandwidth network connections with low-cost computing equipments has stimulated the use of service-oriented environments. Emerging service-oriented environments are expected to be open ...
  • Load balanced forwarding in multimedia wireless sensor networks 
    Işık, Sinan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    Congestion is a challenging problem in wireless sensor networks which exacerbates with the high volume of data traffic imposed by video applications that are enabled by the evolution of low-cost camera hardware. In this ...
  • Application mapping and optimization for cmp based architectures 
    Demiröz, Betül. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    Chip Multiprocessors (CMPs) are becoming standard and primary building blocks for personal computers as well as large scale parallel machines, including supercomputers. In this thesis, our main focus is on performance-aware ...
  • FPFM : a formal specification and verification framework for security policies in multi-domain mobile networks 
    Ünal, Devrim. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    We present a framework called Formal Policy Framework for Mobility (FPFM) for the specification and verification of domain and inter-domain security policies in a multi-domain mobile network environment. FPFM supports the ...
  • Quality of service aware contention and deployment quality analysis in multimedia wireless sensor networks 
    Dönmez, Mehmet Yunus. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    Emerging multimedia applications for wireless sensor networks (WSN) require the co-existence of different types of traffic with different quality of service (QoS) provisions in terms of latency and throughput. Prioritization ...
  • Computer processing of Turkish: |morphological and lexical investigation 
    Güngör, Tunga. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1995., 1995.)
    The morphological analysis of Turkish is the subject of this thesis. Turkish belongs to the group of agglutinative languages. Because of its agglutinative nature, Turkish morphology is quite complex and includes many ...
  • Multi-resolution model plus correction paradigm for task and skill refinement on autonomous robots 
    Meriçli, Çetin. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    Robots need to be taught what type of tasks or skills they are expected to perform, and how to perform those particular tasks or skills. However, there is no universally accepted single approach for transferring the task ...
  • Assessing and enhancing machine learning methods in IVF process : predictive modeling of implantation and blastocyst development 
    Özkaya, Aslı Uyar. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    In this thesis, we address the decision-making problems in in vitro fertilization treatment from the machine learning perspective aiming to increase the clinical success rates. Initially, we present a comprehensive and ...

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