Fen Bilimleri Enstitüsü: Recent submissions

  • Effects of humidity and various gases on the electrical conductivity of polyethylene glycol 
    Erdamar, Özgül. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2006., 2006.)
    Characterization of the electrical properties of covalently linked pure, hydrogenated and hydrophobically modified poly{ethylene glycol} (PEG) thin films under a changing relative humidity is examined by dc measurements. ...
  • Chaotic structures in conductivity mechanisms 
    Yıldırım, H. Ahmet. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2005., 2005.)
    Chaotic behavior in the transient current through thin Aluminum-PMMA-Alu-minum films has been analyzed for times ranging up to 30000s, in the temperaturerange 293-363 K for applied voltages in the range 10-80V. The general ...
  • Cononical structure and integrability of new-dimensional field theories 
    Neyzi, Fahrünisa. (Thesis (Ph.D.)- Bogazici University. Institute for Graduate Studies in Science and Engineering, 1984., 1984.)
  • Primordial and late-time inflation in Brans-Dicke cosmology 
    Çalık, Mehmet. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2006., 2006.)
    The basic motivation of this work is to attempt to explain the rapid primordial inflation and the observed slow late-time inflation by using the Brans-Dicke theory of gravity. We show that the ratio of primordial and ...
  • Simulation of transient curret through polymethylmathacrylate thin films based on a charge density wave model 
    Şahin, Gökhan. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2006., 2006.)
    A piecewise continuous, time dependent di®usive coupling in a classical onedimensional randomly pinned charge density wave model has been used for the analysisof experimentally observed transient current data for ...
  • Analysis of J / ψ ώπ π at BESIII 
    Yüncü, Alperen. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    Using a sample of 1.3 billion J= events collected with the BESIII detector at the BEPCII storage ring, the decay channel J= ! ! 0 0 has been studied. Two of the lightest tetraquark candidates, f0(500) (a.k.a. ) and f0(980) ...
  • Ultrasound simulations using computed tomography images as priors 
    Tuzer, Mert. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    Medical ultrasound system is one of the most ubiquitous imaging modalities in the world. In addition to the noninvasive nature of it, being low-cost and portable compared to other modalities makes it wide-spread in hospitals. ...
  • Aspects of supersymmetric mechanics 
    Çapku, Zürbiye. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Supersymmetry is a space time symmetry which relates bosons to fermions or vice verca. It requires that for each particle there has to be an anti- particle with the same mass. Along this thesis some supersymmetric Lagrangian ...
  • Finite size effects on the Bose-Einstein condensation 
    Doğan, Ebru. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    In this thesis, the nite size e ects for the Bose-Einstein condensation are investigated. The application of the Poisson summation method on the ideal Bose gas (both for relativistic and non-relativistic cases) is studied. ...
  • Search for E6 iso-singlet quarks in ATLAS, through the H J Z J decay channel 
    Sıral, İsmet. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    This thesis searches for the heavy iso-singlet quarks forseen by F. Gursey, P. Ramond and P. Sikivie' s E6 grand uni ed theory model using the data recorded by the ATLAS detector under the pp ! DD ! HjZj ! 4j 2l decay ...
  • Improving physical parameterization for warm bias of REGCM4.0 on arctic and sub-arctic (MID, MID-EAST and NORTHEAST Asia regions 
    Öztürk, Tuğba. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    In this thesis, the semi-empirical cloudiness parameterization adapted to the regional climate model of the Abdus Salam International Center for Theoretical Physics (ICTP), RegCM to improve the model's ability to simulate ...
  • Structural characterization of NiMnX (Sn, In) thin film alloys 
    Güvenç, Sema. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Ferromagnetic Ni-Mn-X (Sn, In) alloys are predicted as potential candidates for energy e cient Magnetocaloric E ect (MCE) technologies. The MCE is the basis of magnetic refrigeration and it is expected to leads to a ...
  • Spin - based three dimensional memory 
    Kalyoncu, Yemliha Bilal. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Magnetic memory is the major information storage method for the last sixty years. Since its invention, this technology has undergone very rapid and vast improvements while being challenged by the requirement for higher ...
  • Fusion of W states using optical quantum gates 
    Diker, Fırat. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    In this work, after talking about historical developments leading to ideas of information processing based on quantum dynamics, we will be constructing basic mathematical expressions for qubits and quantum gates, the To ...
  • Dynamic properties of soft magnetic materials in the shape of thin films and ribbons 
    Kılınç, Muhammed Hasan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    For the last two decades, the giant magneto impedance (GMI) effect has been studied mainly because of its potential use in high sensitivity magnetic field sensors. Nonetheless, magneto impedance response is not only important ...
  • Fluorescence dynamics of bodipy molecules on ito thin film 
    Yartaşı, Ekrem. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Fluorescence dynamics of bodipy dye molecules deposited on Indium Tin Oxide (ITO) thin films is studied in this thesis. Bodipy molecules deposited on ITO thin films of different thicknesses and resistivities are analyzed ...
  • Muon track reconstruction from cathode strip readout of streamer tube planes in chorus muon spectrometer 
    Perdahçı, Nazım Ziya. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1996., 1996.)
    We have studied several methods to achieve the best spatial resolution and the highest track reconstruction efficiency using the limited streamer tube planes with external pickup strips orthogonal to signal wires and the ...
  • Comparison of the multi-anode PMTs with the old HF PMTs by studying the collision data 
    Öz, Yavuz. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    The Hadron Forward (HF) calorimeter of the CMS detector improves jet detection and missing transverse energy resolution in the high pseudorapidity range. HF employs photomultiplier tubes (PMT) that measure the Cerenkov ...
  • On static spherically symmetric solutions of Einstein's equations with two perfect fluids as source 
    Uzun, Nebiye Merve. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    We first point out that in the context of static spherically symmetric solutions of Einstein's Equations, the "radially imperfect fluids" introduced recently are equivalent to superpositions of noninteracting normal and ...
  • Intersections of s-branes with waves and monopoles 
    Beşken, Mert. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    In this thesis we study static and time dependent solutions of supergravity theories. We discuss p-branes, plane waves, Kaluza-Klein monopoles and time dependent S-brane solutions. We then proceed to describe the Kaluza-Klein ...