Browsing Ph.D. Theses by Title

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  • 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.)
  • 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 ...
  • Perturbative and non-perturbative physics from singularities 
    Pazarbaşı, Cihan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2022., 2022), 2022)
    A function that representing a physical quantity has singularities which con tain perturbative or non-perturbative information about the physical system under investigation. Moreover, the theory of resurgence tells us that ...
  • Photoacoustic signal characterization of cell morphology in microchannel flow 
    Uluç, Nasire. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    Photoacoustic (PA) imaging, a hybrid imaging modality, provides both functional and structural information of biological tissue by combining both optical imaging and ultrasound imaging. It takes advantages of high contrast ...
  • Photoacoustic signal detection via atomic force microscopy cantilevers 
    Demirkıran, Aytaç. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    In this thesis, we first present a custom-designed photoacoustic microscopy system (PAM) which includes two separate excitation lasers. One of these tools is a novel fiber-based laser system developed particularly for ...
  • Physical modeling of drug transport in cancer 
    Yonucu, Şirin. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    Understanding the interaction of tumors with their microenvironment is imper ative to understand its development and to increase the efficiency of therapies. In addition to all other genetic and biochemical determinants of ...
  • 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 ...
  • Probing mechanical and chemical properties of biological materials by multiple modalities 
    Pesen, Medine Tuna. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2022., 2022)
    Mechanical and chemical alterations are the signature of most diseases, such as endometriosis, sickle cell, malaria, and cancer. Detecting such alterations has vital importance for early diagnosis and efficient treatments. ...
  • Quantum group structures associated with invariances of some physical algebras 
    Kayserilioğlu, Ufuk. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2005., 2005.)
    In this study, the anticommuting spin algebra is introduced and it is shownto be invariant under the action of the quantum group SOq=-1(3). Furthermore, itsrepresentations and Hopf algebra structure are studied and found ...
  • Quantum phenomena and shape dynamics 
    Dündar, Furkan Semih. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    In this thesis, we considered quantum phenomena (Unruh effect) in Shape Dy namics, version of Bohmian Mechanics that is compatible with Mach’s Principle, and a solution (gravitational collapse of a spherically symmetric ...
  • Scaling solutions of N = 2 supergravity and holography 
    Mirfendereski, Delaram. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2019., 2019.)
    The 4D N = 2 SUGRA is the low energy limit of Type II string theory compactified on a Calabi-Yau three-fold. The theory contains BPS black holes with multi centered configurations consisting of bound states of dyonic ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Some new cosmological applications of the energy-momentum squared gravity 
    Uzun, Nebiye Merve. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2021., 2021.)
    We investigate two specific forms of a new-type of modified gravity called Energy Momentum Squared Gravity (EMSG) constructed by the addition of the term f(TµνT µν) to the Einstein-Hilbert action with a cosmological constant ...
  • Spin orientations and spin-orbit torque in magnetic nanostructures 
    Karakaş, Vedat. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2019., 2019.)
    In this thesis three different spintronic devices and their static behaviours are studied under external magnetic field or applied current. We started to work on the static properties of magnetic antivortices, formed in a ...
  • The role of trigger waves in cancer angiogenesis 
    Debir, Birses. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2022., 2022)
    This study includes mathematical modeling of biological observations and numer ical solutions of these models. Our study focused on different phenomenons, including; vessel formation, intracellular calcium ion concentration, ...

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