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Physics
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Master's
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UNT Theses and Dissertations
Absolute Beta Counting Using Thick Sources
Date: 1950
Creator: Anderson, Miles E., 1926-
Description: The problem with which we shall concern ourselves in this paper is the self-scattering and self-absorption of beta particles by the source.
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Permallink:digital.library.unt.edu/ark:/67531/metadc96872/
Analyzing Magnet System for the Electrostatic Accelerator
Date: August 1954
Creator: Young, Thomas E.
Description: This thesis describes the design and construction of a linear accelerator, specifically, a positive-ion source, a high voltage supply, an accelerating column, and the necessary associated vacuum system.
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Permallink:digital.library.unt.edu/ark:/67531/metadc130409/
The Angular Distribution and Total Flux of Neutrons Obtained from the Deuterium-Tritium Reaction
Date: 1956
Creator: Duggan, Jerome L.
Description: Mono-energetic neutrons have been produced with the low-voltage Cockroft-Walton accelerator at North Texas State College using two different reactions. It is the purpose of this paper to report the angular distribution and total flux of the neutrons obtained from the T(D,n) reaction.
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Permallink:digital.library.unt.edu/ark:/67531/metadc107901/
The Angular Distribution of the Deuterium-Deuterium Neutrons with 100 Kev Deuterons
Date: 1956
Creator: Hackfield, Bobby J.
Description: It is the purpose of this paper to present the experimental techniques used in obtaining. 3.25 MeV neutrons from the H2(d,n)He3 reaction, as well as an analysis of the experimental data.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc107904/
Application of the finite element method to some simple systems in one and two dimensions.
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Date: May 2002
Creator: Hunnell, Jason C.
Description: The finite element method (FEM) is reviewed and applied to the one-dimensional eigensystems of the isotropic harmonic oscillator, finite well, infinite well and radial hydrogen atom, and the two-dimensional eigensystems of the isotropic harmonic oscillator and the propagational modes of sound in a rectangular cavity. Computer codes that I developed were introduced and utilized to find accurate results for the FEM eigensolutions. One of the computer codes was modified and applied to the one-dimensional unbound quantum mechanical system of a square barrier potential and also provided accurate results.
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Permallink:digital.library.unt.edu/ark:/67531/metadc3087/
Approach to Quantum Information starting from Bell's Inequality (Part I) and Statistical Analysis of Time Series Corresponding to Complex Processes (Part II)
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Date: May 2002
Creator: Failla, Roberto
Description: I: Quantum information obeys laws that subtly extend those governing classical information, making possible novel effect such as cryptography and quantum computation. Quantum computations are extremely sensitive to disruption by interaction of the computer with its environment, but this problem can be overcome by recently developed quantum versions of classical error-correcting codes and fault-tolerant circuits. Based on these ideas, the purpose of this paper is to provide an approach to quantum information by analyzing and demonstrating Bell's inequality and by discussing the problems related to decoherence and error-correcting. II: The growing need for a better understanding of complex processes has stimulated the development of new and more advanced data analysis techniques. The purpose of this research was to investigate some of the already existing techniques (Hurst's rescaled range and relative dispersion analysis), to develop a software able to process time series with these techniques, and to get familiar with the theory of diffusion processes.
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Permallink:digital.library.unt.edu/ark:/67531/metadc3092/
Backscattering from Prolate Spheroids at Microwave Frequencies
Date: 1956
Creator: Sybert, Jim
Description: This thesis examines backscattering from prolate spheroids at microwave frequencies.
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Permallink:digital.library.unt.edu/ark:/67531/metadc107919/
Ballistic deposition: global scaling and local time series.
Date: December 2003
Creator: Schwettmann, Arne
Description: Complexity can emerge from extremely simple rules. A paradigmatic example of this is the model of ballistic deposition (BD), a simple model of sedimentary rock growth. In two separate Problem-in-Lieu-of Thesis studies, BD was investigated numerically in (1+1)-D on a lattice. Both studies are combined in this document. For problem I, the global interface roughening (IR) process was studied in terms of effective scaling exponents for a generalized BD model. The model used incorporates a tunable parameter B to change the cooperation between aggregating particles. Scaling was found to depart increasingly from the predictions of Kardar-Parisi-Zhang theory both with decreasing system sizes and with increasing cooperation. For problem II, the local single column evolution during BD rock growth was studied via statistical analysis of time series. Connections were found between single column time series properties and the global IR process.
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Permallink:digital.library.unt.edu/ark:/67531/metadc4392/
Brownian Movement and Quantum Computers
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Date: December 2004
Creator: Habel, Agnieszka
Description: This problem in lieu of thesis is a discussion of two topics: Brownian movement and quantum computers. Brownian movement is a physical phenomenon in which the particle velocity is constantly undergoing random fluctuations. Chapters 2, 3 and 4, describe Brownian motion from three different perspectives. The next four chapters are devoted to the subject of quantum computers, which are the signal of a new era of technology and science combined together. In the first chapter I present to a reader the two topics of my problem in lieu of thesis. In the second chapter I explain the idea of Brownian motion, its interpretation as a stochastic process and I find its distribution function. The next chapter illustrates the probabilistic picture of Brownian motion, where the statistical averages over trajectories are related to the probability distribution function. Chapter 4 shows how to derive the Langevin equation, introduced in chapter 1, using a Hamiltonian picture of a bath with infinite number of harmonic oscillators. The chapter 5 explains how the idea of quantum computers was developed and how step-by-step all the puzzles for the field of quantum computers were created. The next chapter, chapter 6, discus the basic quantum unit of information ...
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Permallink:digital.library.unt.edu/ark:/67531/metadc4660/
A Continuously Sensitive Cloud Chamber
Date: 1951
Creator: Hughes, James E.
Description: A continuous cloud chamber would be a valuable asset to laboratory work in nuclear and atomic physics. For this reason the construction and investigation of a continuously sensitive diffusion cloud chamber has been undertaken. It is the purpose of this paper to report the design and operating characteristics of such a chamber.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc97019/