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Browsing PhD Thesis by Title

Browsing PhD Thesis by Title

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  • Analysis of Viscous Incompressible Fluid Flows and Heat Transfer 
    Uddin, Md. Sharif (University of Rajshahi, 2010)
    We first present a brief ideas and principles in "Fluid Mechanics" which may serve as the background materials of viscous, incompressible laminar Newtonian or non-Newtonian fluid flow problems considered in the present ...
  • Analysis on Viscous Incompressible Thermal Flow on a Ventilated Enclosure by Finite Element Method 
    Ahammad, Main Uddin (University of Rajshahi, 2014)
    Heat transfer in enclosure in which the influence of free (natural) and forced convection (mixed convection) are of comparable magnitude occurs frequently in engineering situations. The applications include the heat ...
  • Analytical Invcstlgations in Tubulent and IVIlID Tttdmlent Flow 
    Rahman, Md. Lutfor (198)
    The thesis entitled "Analytical Investigations in Turbulent and MHD Turbulent Flow" is being presented for the award of the degree of Doctor of Philosophy in Mathematics. It is the outcome of my research conducted in the ...
  • Asymptotic Method for Time Dependent Nonlinear Differential Systems with Slowly Varying Coefficients 
    Roshid, Harun-Or- (University of Rajshahi, 2013)
    Almost all perturbation methods are developed to find periodic solutions of nonlinear system where transients are not considered. First Krylov and Bogoliubov introduced a perturbation method which is well known as “asymptotic ...
  • Bekenstein-Hawking Entropy by Energy Quantization from Different Black Holes 
    Hossain, Md. Jakir (University of Rajshahi, 2016)
    We investigate the Bekenstein-Hawking entropy from different types of non-rotating black holes in de Sitter and Anti-de Sitter spaces by using the energy quantization mechanism in analogy with Bohr’s atomic model. We ...
  • Characterizations of K-Derivations and Bi-Derivations on Lie Ideals of Gamma Rings 
    Nazneen, Ayesha (University of Rajshahi, 2016)
    The present thesis entitled, "CHARACTERIZATIONS OF K-DERIVATIONS AND BI-DERIVATIONS ON LIE IDEALS OF GAMMA RINGS" is the outcome of researches carried out by me under the close supervisions of Dr. Akhil Chandra Paul, ...
  • Characterizations of Prime and Semiprime Gamma Rings with Derivations and Lie Ideals 
    Rahman, Md. Mizanor (University of Rajshahi, 2014)
    Gamma ring was first introduced by N. Nobusawa as a generalization of a classical ring. W. E. Barnes generalized the definition of a gamma ring due to Nobusawa. Presently the gamma ring due to Barnes is known as a gamma ...
  • Characterizations of Some Radical Rings and Gamma Rings 
    Rashid, Md. Mahbubur (University of Rajshahi, 2006)
    The present thesis entitled "Characterizations of Some Radical Rings and Gamma Rings" is the outcome of the research by me under the supervision of Dr. A. C. Paul, Professor, Department of Mathematics, University of Rajshahi. ...
  • Compactness and Connectedness Concept in Intuitionistic Fuzzy Topological Spaces 
    Mahbub, Md. Aman (University of Rajshahi, 2020-12)
    The fundamental concept of a fuzzy set and fuzzy set operations was first introduced by L. A. Zadeh (Zadeh, 1965) in 1965 and it provides a natural foundation for treating mathematically the fuzzy phenomena, which exists ...
  • Cosmic String in theory of General Relativity 
    Biswas, Md.Elias Uddin (1997)
    This thesis is organized as follows. Chapter I contains a brief discussion of the production of various topological defects in cosmological phase transitions in the early universe. The three kinds of topological defects ...
  • Damped Forced Vibration of Some Quasi-Linear Differential Systems 
    Dey, Pinakee (University of Rajshahi, 2008)
    There are many approaches for approximating solutions of nonlinear vibrating problems. The most common methods for constructing approximate analytical solutions to the nonlinear vibrating problems are the perturbation ...
  • Effects of Air Bubbles on Storm Surge 
    Rahman, Md. Azizur (University of Rajshahi, 2011)
    The development of real time operational surge prediction system in the Bay of Bengal incorporating air bubble effects is still limited and is needed immediate attention. In this respects the study has been focused the ...
  • Investigation of Some Aspects of Protoplanetary Model of Planetary Formation 
    Paul, Gour Chandra (University of Rajshahi, 2005)
    In this thesis we have investigated some aspects of the protoplanetary theory of planetary formation, namely, the structure of a protoplanet, sedimentation of heavy elements in a protoplanet, and the effect of mass loss ...
  • Investigation of some aspects of protoplanetary model of planetary formation 
    Paul, Gour Chandra (University of Rajshahi, 2005)
    In this thesis we have investigated some aspects of the protoplanetary theory of planetary formation, namely, the structure of a protoplanet, sedimentation of heavy elements in a protoplanet, and the effect of mass loss ...
  • KBM Asymptotic Method for third order Nonlinear Oscillations 
    Alam, Md. Shamsul (University of Rajshahi, 2000)
    In most treatments or nonlinear oscillations hy perturbation method. only periodic oscillations are treated; transients are not considered. Krylov and Bogoliubov have used a perturbation method to discuss transients in the ...
  • N-Ideals of a Lattice 
    Latif, Md. Abdul (University of Rajshahi, 1994)
    This thesis studies the nature of n-ideals of a lattice. The topic arose out of a study on the kernels, around a particular element n, of a skeletal congruence on a distributive lattice. The idea of n-ideals in a lattice ...
  • On Finitely Generated n-ldeals of a Nearlattice 
    Rahman, Md. Mizanur (University of Rajshahi, 2006)
    The thesis studies extensively the nature of finitely generated n-ideals of a near lattice. Many authors including [1], [34] and [35] have studied about n-ideals of a lattice. A convex sublattice containing a fixed element ...
  • On Fuzzy Compactness 
    Talukder, Md. Abdul Mottalib (University of Rajshahi, 2015)
    The fundamental concept of a fuzzy set and fuzzy set operations was first introduced by L. A. Zadeh [175] in 1965 and it provides a natural foundation for treating mathematically the fuzzy phenomena, which exists pervasively ...
  • On Generalizations of Separation properties, Compactness and Connectedness 
    Biswas, Sanjoy Kumar (University of Rajshahi, Rajshahi, 2019)
    The thesis is concerned with generalizations of some important and interesting properties of separation, compactness and connectedness in a span of seven chapters. In the first chapter pseudo regular and pseudo normal ...
  • On Generalizations of Separation Properties, Compactness and Connectedness 
    Biswas, Sanjoy Kumar (University of Rajshahi, 2019)
    The thesis is concerned with generalizations of some important and interesting properties of separation, compactness and connectedness in a span of seven chapters. In the first chapter pseudo regular and pseudo normal ...

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