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 Collection: UNT Theses and Dissertations
Older Workers: Disability And Employment

Older Workers: Disability And Employment

Date: December 2011
Creator: Litle, Melanie A.
Description: The purpose of this study was to explore the demographic variables, typical vocational services, and competitive employment rates of older workers, ages 40 - 69 years of age, with disabilities using the RSA-911 database. The results describe the types of services received and the competitive employment outcomes for state and federal vocational rehabilitation consumers receiving services in 2009. Furthermore the sample of older workers (N = 1,152) was equally stratified into three age groups. Older workers, aged 60 to 69, had higher levels of education, received more types of vocational services, and were competitively employed at a much higher rate than those in the other age groups. The methods, discussion, study limitations, and recommendations for future research are presented.
Contributing Partner: UNT Libraries
Oligonucleotide guanosine conjugated to gallium nitride nano-structures for photonics.

Oligonucleotide guanosine conjugated to gallium nitride nano-structures for photonics.

Date: August 2008
Creator: Li, Jianyou
Description: In this work, I studied the hybrid system based on self-assembled guanosine crystal (SAGC) conjugated to wide-bandgap semiconductor gallium nitride (GaN). Guanosine is one of the four bases of DNA and has the lowest oxidation energy, which favors carrier transport. It also has large dipole moment. Guanosine molecules self-assemble to ribbon-like structure in confined space. GaN surface can have positive or negative polarity depending on whether the surface is Ga- or N-terminated. I studied SAGC in confined space between two electrodes. The current-voltage characteristics can be explained very well with the theory of metal-semiconductor-metal (MSM) structure. I-V curves also show strong rectification effect, which can be explained by the intrinsic polarization along the axis of ribbon-like structure of SAGC. GaN substrate property influences the properties of SAGC. So SAGC has semiconductor properties within the confined space up to 458nm. When the gap distance gets up to 484nm, the structure with guanosine shows resistance characteristics. The photocurrent measurements show that the bandgap of SAGC is about 3.3-3.4eV and affected by substrate properties. The MSM structure based on SAGC can be used as photodetector in UV region. Then I show that the periodic structure based on GaN and SAGC can have photonic ...
Contributing Partner: UNT Libraries
Olympic Dances by John Harbison, a Lecture Recital together with Three Recitals of Selected Works of D. Holsinger, P. Granger, K. Husa, B. Rands, R. Vaughan Williams, and Others

Olympic Dances by John Harbison, a Lecture Recital together with Three Recitals of Selected Works of D. Holsinger, P. Granger, K. Husa, B. Rands, R. Vaughan Williams, and Others

Date: December 1997
Creator: Kohlenberg, Kenneth Howard
Description: John Harbison's Olympic Dances was composed in 1996 and premiered in February 1997. The work was written as a piano score before it was orchestrated for a wind ensemble of 25 winds and two percussionists.The first section of the paper focuses on the various influences that have affected Harbison's compositional style. The composer's educational background includes several prominent teachers whose instruction had great impressions. Special emphasis is placed on those characteristics of Harbison's style that are most prominent in the work with which this paper is concerned, Olympic Dances. Olympic Dances was commissioned by the College Band Directors National Association and premiered at the CBDNA Twenty-ninth National Conference in Athens, Georgia, in a collaborative performance of the University of North Texas Wind Symphony and Pilobolus Dance Theatre. The second part of the paper presents an historical overview of CBDNA commissioning projects along with a summary of the genesis of the commissioning of Olympic Dances. The primary focus of the study appears in the third section of the paper. An analysis of the four movements of Olympic Dances is presented with attention to the objective elements of harmonic and melodic structures along with a focus on orchestration and scoring. This section ...
Contributing Partner: UNT Libraries
On Bounded Variation

On Bounded Variation

Date: August 1966
Creator: Lewis, Paul Weldon
Description: This paper is primarily concerned with developing the theory of real-valued functions of bounded variation and those ideas which are closely related to this main topic. In addition to this, some emphasis has been placed on the relationship of the theory of functions of bounded variation to specific areas of analysis. In particular, integration theory has been chosen as the vehicle to demonstrate this connection.
Contributing Partner: UNT Libraries
On Chaos and Anomalous Diffusion in Classical and Quantum Mechanical Systems

On Chaos and Anomalous Diffusion in Classical and Quantum Mechanical Systems

Date: August 1998
Creator: Stefancich, Marco
Description: The phenomenon of dynamically induced anomalous diffusion is both the classical and quantum kicked rotor is investigated in this dissertation. We discuss the capability of the quantum mechanical version of the system to reproduce for extended periods the corresponding classical chaotic behavior.
Contributing Partner: UNT Libraries
On Continuity of Functions Defined on Unrestricted Point Sets

On Continuity of Functions Defined on Unrestricted Point Sets

Date: August 1958
Creator: Wilson, Ural
Description: This thesis is concerned with an investigation of the generalizations of continuous real functions of a real variable. In particular, the relationship between uniform continuity and ordinary continuity is concerned. The concept of uniform continuity was first introduced by Heine about 1900.
Contributing Partner: UNT Libraries
On Delocalization Effects in Multidimensional Lattices

On Delocalization Effects in Multidimensional Lattices

Date: May 1998
Creator: Bystrik, Anna
Description: A cubic lattice with random parameters is reduced to a linear chain by the means of the projection technique. The continued fraction expansion (c.f.e.) approach is herein applied to the density of states. Coefficients of the c.f.e. are obtained numerically by the recursion procedure. Properties of the non-stationary second moments (correlations and dispersions) of their distribution are studied in a connection with the other evidences of transport in a one-dimensional Mori chain. The second moments and the spectral density are computed for the various degrees of disorder in the prototype lattice. The possible directions of the further development are outlined. The physical problem that is addressed in the dissertation is the possibility of the existence of a non-Anderson disorder of a specific type. More precisely, this type of a disorder in the one-dimensional case would result in a positive localization threshold. A specific type of such non-Anderson disorder was obtained by adopting a transformation procedure which assigns to the matrix expressing the physics of the multidimensional crystal a tridiagonal Hamiltonian. This Hamiltonian is then assigned to an equivalent one-dimensional tight-binding model. One of the benefits of this approach is that we are guaranteed to obtain a linear crystal with a ...
Contributing Partner: UNT Libraries
On Envelopes and Extraneous Loci of Differential Equations of Order One and Higher Degree

On Envelopes and Extraneous Loci of Differential Equations of Order One and Higher Degree

Date: August 1961
Creator: Lane, Hal Burns
Description: The purpose of this paper is to examine the properties of the envelope and the extraneous loci associated with the solution curves of ordinary differential equations of the first order and degree greater than one.
Contributing Partner: UNT Libraries
On Groups of Positive Type

On Groups of Positive Type

Date: August 1995
Creator: Moore, Monty L.
Description: We describe groups of positive type and prove that a group G is of positive type if and only if G admits a non-trivial partition. We completely classify groups of type 2, and present examples of other groups of positive type as well as groups of type zero.
Contributing Partner: UNT Libraries
On Lane's Integral

On Lane's Integral

Date: August 1971
Creator: Hill, William James
Description: The problem and purpose of this paper is to develop Lane's Integral in two-space, and then to expand these concepts into three-space and n-space. Lane's Integral can be used by both mathematicians and statisticians as one of the tools in the calculation of certain probabilities and expectations. The method of presentation is straightforward with the basic concepts of integration theory and Stieltjes Integral assumed.
Contributing Partner: UNT Libraries