Fen Bilimleri Enstitüsü: Recent submissions

  • On the history of expansion and matter - energy content of the universe 
    Çamlıbel, Ali Kazım. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    The aim of this dissertation is to explore the vast phenomenological area between the cosmological observations and the theoretical approaches. We are speci cally focusing on type Ia supernova data and what they tell us ...
  • CERN LINAC4 beam dynamics studies and commissioning up to 12 MeV 
    Yıldız, Veli. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    Linac4 is a normal conducting, 160 MeV H{u100000} ions accelerator that is being constructed within the scope of the LHC Injectors Upgrade project. Linac4 will be connected to the Proton Synchrotron Booster during the next ...
  • Modified theories of gravity via alternative couplings and their cosmological analyses 
    Kavuk, Mehmet. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    We propose alternative gravitational couplings, fields and design some models to explain some cosmological problems. We investigate a cosmological model in which the Stueckelberg fields describing a massive photon are ...
  • Signs and magnitudes of Lyapunov exponents in continuous time dynamical systems 
    Birol, İnanç. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Sciences and Engineering, 1997., 1997.)
    Methods for algebraically determining the signs and the magnitudes of Lyapunov exponents of a given dynamical system are studied.A number of Hamiltonian and dissipative systems are investigated.The existence of zero ...
  • Search for axions with micromegas detectors in the cern cast experiment 
    Yıldız, Süleyman Cenk. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    The CAST experiment is searching for the axion, which is a light, weakly interacting pseudoscalar particle, that is proposed to solve the so called Strong Charge-Parity Problem. The axions CAST is looking for are produced ...
  • Black holes and cosmic censorship 
    Düztaş, Koray. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2014.)
    This thesis starts with a brief review of causality conditions, gravitational collapse and singularity theorems. Cosmic censorship conjecture is introduced and the need for such a conjecture to preserve the deterministic ...
  • Effects of different types of fields to cosmology and of extra dimension to FCNC hadronic processes of the SM 
    Katırcı, Ayşe Nihan. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    The Effects of Different Types of Fields to Cosmology. Alternative cosmological models are proposed as a harbinger of new physics to overcome the perceived short- comings of the standard theory of cosmology (ACDM). We ...
  • Measurement of the differential dijet production cross section in proton-proton collisions at √s= 7 TeV 
    Işıldak, Bora. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    A measurement of the double-di erential inclusive dijet production cross section in proton-proton collisions at √s = 7 TeV is presented as a function of the dijet invariant mass and jet rapidity. The data correspond to ...
  • Heat kernel methods in many body problems 
    Erman, Fatih. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2010., 2010.)
    The main goal of this thesis is to construct a non-perturbative renormalization for several models in quantum mechanics and field theory by means of the heat kernel in two or three dimensional Riemannian manifolds and study ...
  • Cross sections for neutron-deuteron elastic scattering in the energy range 135 - 250 MeV 
    Ertan, Erol. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    New results for neutron-deuteron elastic scattering cross sections at energies from 135 to 250 MeV and center-of-mass angles from 80 to 130 have been measured at the WNR facility of the Los Alamos Neutron Science Center ...
  • Fluorescence dynamics of dye-dye and dye-nanostructures interactions 
    Açıkgöz, Sabriye. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    The decay dynamics of (Boradiazaindacene) BODIPY dye molecules embedded in Porous silicon (PSi) nanostructures produced by electrochemical anodization of p-type silicon wafers in an HF solution are investigated using ...
  • Bound state solutions of the Schrödinger equation for potentials with dirac delta functions 
    Uncu, Haydar. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    A general method for the bound state solutions of the SchrÄodinger equation for analytically solvable potentials with any ¯nite number of Dirac delta functions is intro- duced for n-dimensional systems. Then, the potentials ...
  • General unitary quantum groups and generalized Fermion algebras 
    Altıntaş, Azmi Ali. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    Since the middle of the twentieth century, physicists have concentrated on finding quantum counterparts of classical systems. When a classical system is quantized its invariance group may still be a classical group. In the ...
  • Chaoticity analysis of the current through pure, hydrogenated and hydrophobically modified PEG-SI thin films under varying relative humidity 
    Atak, Kaan. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    Polyethylene Glycol is known to have an irregular current characteristic under constant voltage and slowly varying relative humidity. In this study the current through a thin film of Gamma-isocyanatopropyltriethoxysilane ...
  • On the classical solutions of field theoretical models 
    Kalaycı, Jan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1984., 1984.)
  • Cylindrically symmetric spacetimes with pure rediation 
    Delice, Özgür. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2006., 2006.)
    In this thesis we have investigated some solutions of Einstein's field equations having cylindrical symmetry. The corresponding energy momentum tensor of most of these solutions has pure radiation equation of state. First, ...
  • Effects of gases on optical properties of polyethylene glycol 
    Bilen, Bükem. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    Humidity induced changes in the refractive index and thickness of polyethylene glycol (PEG) thin films are in situ determined by optical waveguide spectroscopy. PEG brushes are covalently attached to the surface of a thin ...
  • Black holes, cosmology and Brans-Dicke theories in 4+1 dimensional universe 
    Çiftci, Dilek. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    We consider the embedding of 3+1 dimensional cosmology in 4+1 dimensional Jordan-Brans-Dicke theory. We show that exponentially growing and power law scale factors are implied. We solve the Brans-Dicke equations and we ...
  • Exactly solvable potentials with Dirac delta point interactions 
    Erkol, Hakan. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    A general method to obtain s-wave bound states of the Schrödinger equation for analytically solvable potentials together with a finite number of the Dirac delta functions is presented for three-dimensional systems. The ...
  • A study on susy search strategies in the CMS, HPD noise spectrum and electron reconstruction efficiency 
    Deliömeroğlu, Mehmet. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2010., 2010.)
    The hybrid photo diodes in the HCAL will play an important role in detection of the jets and missing energy. It is very important to understand and monitor their charge spectrum. The charge spectrum of the HPD detectors ...

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