Fen Bilimleri Enstitüsü: Recent submissions

  • Colour TV sync pulse generator 
    Orak, Kemal. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1981., 1981.)
    In this thesis study, the,synchronizing signals which are used in the transmitter systems of the television that is the most common mass communication means of today have been studied and a practical studio pulse generator ...
  • Active packet filtering against DDoS attack 
    Seifpoor, Tina. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Distributed Denial of Service (DDoS) attacks are one of the dominant and persistent threats to the security of the Internet nowadays. The aim of these attacks are mainly resource or the bandwidth consumption with enormous ...
  • Simulating atmospheric turbulence using a bubble model for free space optical communication links 
    Yüksel, Demet. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    Free space optical (FSO) communication has emerged as a viable technology for broadband wireless applications. FSO technology o ers the potential of high bandwidth capacity over unlicensed optical wavelengths. On long-range ...
  • A novel biosensor based on a planar water gated organic field effect transistor using biotin functionalized polythiophene 
    Sis, Farshid Taleb. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    In this thesis, a novel affinity type biological sensor based on a planar water-gated field effect transistor (WGOFET) is introduced and investigated. The liquid electrolyte layer in the WGOFET is used as the gate insulator ...
  • Adative bias and class AB operational amplifier topologies for sigma delta converters 
    Karaduman, Tayyar Oğuz. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    The technological improvements in digital Very Large Scale Integrated (VLSI) circuits increase the need of analog digital converter with high performance and lower power consumption. Principally, the oversampling techniques ...
  • Automatic datapath and controller generation for reconfigurable ASIP 
    Çulha, Ender. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    The need for complex designs that meet the desired application speci c criteria and time-to-market pressure increase the importance of High Level Synthesis (HLS) tools, which take high level behavioral representation of ...
  • Integer programming based analysis of decoding failures for LDPC codes 
    Sarıduman, Abdullah. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    Low-density parity-check (LDPC) codes are one of the most e cient and common error correcting codes thanks to their high error performance. Using iterative messagepassing decoding or linear programming (LP) decoding with ...
  • Multirobot exploration with bubble space based topological maps 
    Akdeniz, Bayram Cevdet. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    This thesis is concerned with autonomous exploration with single and multirobot systems. In particular, the robots are assumed to be endowed with three-dimensional laser sensors. The exploration strategies are based on ...
  • Thermoelectrical properties of polithiophene (P3HT) thin film polymers 
    Hacıahmetoğlu, İbrahim Gökhan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    Conducting and semiconducting polymers show very interesting thermoelectric characteristics by having relatively high electrical but low thermal conductivity. This suggests that they can be used in thermoelectric patterning, ...
  • On off keying modulation/demodulation and its applications 
    Omuz, Berk. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    OOK based communication is getting more and more popular to reduce the power consumption of portable systems. Although OOK based communication requires less circuit complexity, high performance structures are needed. Most ...
  • FPMA design in submicron technologies with digital error correction 
    Kara, İsmail. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    The trend in VLSI systems towards System-On-Chip (SOC) leads to integration of digital and analog circuits on a single chip. The communication between the digital and analog blocks is employed by A/D and D/A converters. ...
  • A harmonic balance method and its implementation for the steady-state analysis of nonlinear networks 
    Kavaklıoğlu, Ömer. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1981., 1981.)
    A method for finding the petiodic solution of nonlinear networks which avoids the time domain solution of the dynamic equations has been investigated. In the method, the network under consideration is decomposed into one ...
  • New approaches to automated analog circuit design for robustness 
    Kırbaç, Can Doğan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    This thesis presents di erent simulation-based analog circuit synthesis methodologies to obtain robust circuit synthesis and their results. HSPICE is used as simulator and SACSES is used as general methodology for mentioned ...
  • Assertion based verification for analog and mixed-signal designs using simulations 
    Ulus, Doğan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    This thesis studies assertion based veri cation methodology for analog and mixedsignal (AMS) designs and improves analog expressiveness of assertions. Assertion based veri cation methodology is originally derived for digital ...
  • Delay based handover algorithm design for femtocell networks 
    Kaymakçıoğlu, Piri. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    Mobile communication systems have limited frequency resources and macrocellular architecture utilizes smaller one tier cells to gain frequency reuse. One approach to enhance the overall system capacity is to use two tier ...
  • Design and characterization of the power supply unit and driver blocks of a MOS based localization system for MRI 
    Çamlı, Berk. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    MRI is an imaging technique frequently used in medicine and related elds. Advantages associated with it are the acquisition of images with higher contrast and exibility in computational environment. MRI is also desirable ...
  • Rigid & elastic composite registration of 3D LEG T1-weighted MR images for strain analysis 
    Derman, Ekberjan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    Strain analysis of deformation eld is a crucial step for scienti c analysis of muscle structures in MRI data sets. They are commonly used for di erent types of data analysis such as force transmission among muscles which ...
  • Skeletal muscle deformation analysis using diffusion tensor magnetic resonance imaging 
    Akyazı, Pınar. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    Skeletal muscles are highly organized tissues formed of ber bundles packed together. Muscle bers have distinct orientations which makes them a favorable subject for di usion tensor imaging (DTI) based analyses. DTI ...
  • Maximum disparity estimation for depth discomfort detection 
    Gürol, Ömer Can. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    This thesis documents a work in which prediction of depth related discomfort levels, while watching stereoscopic 3D videos is studied. In commercial 3D videos, excessive depth levels can cause discomfort to the viewer and ...
  • Effects of reverberation on monaural speech separation and recognition 
    Kurçenli, Hakan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    Speech recognition is an active area of research with implementations spanning from commercial to medical applications such as hearing aids. Recognition of speech signals is studied for decades and a lot of progress has ...