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 Collection: UNT Theses and Dissertations
The Interactions of Plasma with Low-k Dielectrics: Fundamental Damage and Protection Mechanisms

The Interactions of Plasma with Low-k Dielectrics: Fundamental Damage and Protection Mechanisms

Date: August 2011
Creator: Behera, Swayambhu Prasad
Description: Nanoporous low-k dielectrics are used for integrated circuit interconnects to reduce the propagation delays, and cross talk noise between metal wires as an alternative material for SiO2. These materials, typically organosilicate glass (OSG) films, are exposed to oxygen plasmas during photoresist stripping and related processes which substantially damage the film by abstracting carbon, incorporating O and OH, eventually leading to significantly increased k values. Systematic studies have been performed to understand the oxygen plasma-induced damage mechanisms on different low-k OSG films of various porosity and pore interconnectedness. Fourier transform infrared spectroscopy, x-ray photoelectron spectroscopy and atomic force microscopy are used to understand the damage kinetics of O radicals, ultraviolet photons and charged species, and possible ways to control the carbon loss from the film. FTIR results demonstrate that O radical present in the plasma is primarily responsible for carbon abstraction and this is governed by diffusion mechanism involving interconnected film nanopores. The loss of carbon from the film can be controlled by closing the pore interconnections, He plasma pretreatment is an effective way to control the damage at longer exposure by closing the connections between the pores.
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Interactions of Presentation Formats and Decision-Maker Characteristics upon Multiple Decision-Making Tasks: an Experiment Using Multiple Cognitive Assessments

Interactions of Presentation Formats and Decision-Maker Characteristics upon Multiple Decision-Making Tasks: an Experiment Using Multiple Cognitive Assessments

Date: December 1994
Creator: Henson, Kerry L. (Kerry Lynn)
Description: Information systems research tends to ignore individual differences in users. This laboratory experiment sought to illuminate contributions of decision-makers' cognitive processes to decision outcome as reflected in four hypothesis sets: the impact of imagery preference and presentation format upon (HI) recall accuracy and upon hemispheric activation during (H2) encoding and (H3) recall, and (H4) to examine the relationship between hemispheric activation differences and accuracy differences. Point-value (specific values) and intraset-pattern (relationships between values) recall were considered. Thirty MBA students, grouped by imagery preference (cognitive style) as favoring verbal (textual) or visual (graphical) information presentation, performed computer-based recall tasks using tabular and graphical formats in a repeated measures design. Hemispheric activation (cognitive process) was assessed using ratios of EEG activity in six frequency bands captured from six pairs of homologous electrode sites during encoding and recall.
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The Interactive Effect of Fund Balance and Revenue Diversification on Local Government Fiscal Sustainability

The Interactive Effect of Fund Balance and Revenue Diversification on Local Government Fiscal Sustainability

Date: August 2013
Creator: Wachira, David W.
Description: This dissertation explores how cities achieve fiscal sustainability—the financial capacity to consistently meet basic public service responsibilities regardless of economic conditions. Two research questions arise from the interplay between the local economy and fiscal sustainability. First, what management tools do cities use to achieve fiscal sustainability given that economic conditions are largely outside their control? Second, what explains the variation among cities in the financial management tools used to achieve fiscal sustainability? The financial management tools of interest in this study are revenue diversity and the size of the fund balance. It is conjectured that financial management tools interact with each other prompting the tools to function as policy substitutes for each other. Cities achieve fiscal sustainability by strategically choosing budget-balancing tools appropriate to their economic conditions. The study utilizes a cross-state comparison from 351 Massachusetts municipal governments using panel data from 2000 to 2009 and 993 New York municipal governments using panel data from 2001 to 2010. Using theories of fiscal sustainability and revenue diversification, several models are proposed that test the interactive effects of fund balance size and revenue diversity on fiscal sustainability. The results from the empirical analyses show that cities use various financial management tools to ...
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The Interactive Effects of Tax and Expenditure Limitations Stringency with Revenue Diversity and the Council-manager Form of Government on Municipal Expenditures

The Interactive Effects of Tax and Expenditure Limitations Stringency with Revenue Diversity and the Council-manager Form of Government on Municipal Expenditures

Date: December 2014
Creator: Jaikampan, Kraiwuth
Description: This dissertation examines the effects of tax and expenditure limitations (TELs) stringency and its interaction with revenue diversity and the council-manager form of government on municipal general fund expenditure. TELs are explicit rules that states impose to reduce local government spending. TELs stringency varies from state to state, leading to difficulties in assessing their impact across the nation. This dissertation proposes a new means for measuring the stringency of TELs imposed on local governments. Factor analysis is utilized, and then factor scores are calculated to identify degrees of TELs stringency. This study contends that higher levels of TELs stringency are associated with lower local government spending. However, the effectiveness of TELs is dependent on revenue diversity and the form of government. This study suggests that both revenue diversity and the council-manager form of government mitigate the impacts of TELs stringency on local government spending. Panel data from 2007 to 2011 from 1,508 municipalities are utilized. This study finds that higher levels of TELs stringency are associated with lower levels of municipal general fund expenditures per capita. However, TELs stringency is effective only when revenue diversity is low and when cities have a form of government other than council-manager. These results ...
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An Interactive Tool to Investigate the Inference Performance of Network Dynamics From Data

An Interactive Tool to Investigate the Inference Performance of Network Dynamics From Data

Date: August 2012
Creator: Veenadhar, Katragadda
Description: Network structure plays a significant role in determining the performance of network inference tasks. An interactive tool to study the dependence of network topology on estimation performance was developed. The tool allows end-users to easily create and modify network structures and observe the performance of pole estimation measured by Cramer-Rao bounds. The tool also automatically suggests the best measurement locations to maximize estimation performance, and thus finds its broad applications on the optimal design of data collection experiments. Finally, a series of theoretical results that explicitly connect subsets of network structures with inference performance are obtained.
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Interest and Personality Patterns of Experienced Teachers

Interest and Personality Patterns of Experienced Teachers

Date: 1950
Creator: Vaughan, George E., Jr.
Description: The purpose of this study is to determine and analyze interest and personality patterns of experienced teachers as measured by certain standardized tests.
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Interest Differentiation and Profile Elevation: Investigating Correlates of Depression, Confidence, and Vocational Identity

Interest Differentiation and Profile Elevation: Investigating Correlates of Depression, Confidence, and Vocational Identity

Date: May 2007
Creator: Davis, Greta Ann
Description: Using a correlational design, this study examined relationships among and between differentiation, profile elevation, gender and educational level (predictors) and depression, confidence, and vocational identity (criterion). Clients presenting for counseling services (n = 90) with a career concern at a large, metropolitan university were included in the study. Six assumptions were examined using three single hierarchical regression analyses to reveal relationships among and between variables. Two research assumptions were confirmed at the .05 level of significance. Bivariate correlations were computed to examine the structure coefficients. Beta weights and structure coefficients were examined to determine the relative contribution of the predictors in the regression model. Results indicated that differentiation, profile elevation, gender and educational level did not predict significant variance in depression and vocational identity. However, differentiation, profile elevation, and educational level did significantly predict confidence (p< .0001).
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Interesting the Disinterested School Child through Arts and Crafts

Interesting the Disinterested School Child through Arts and Crafts

Date: 1947
Creator: Lindsey, Vera Grace
Description: The problem is to determine why fifteen lower grade pupils were absent from school so many times during the previous year and to ascertain whether the pupils' attendance records could be improved in the present year through arts and crafts.
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The Interests and Activities of the Seventh Grade, Huey School, Wichita Falls, Texas

The Interests and Activities of the Seventh Grade, Huey School, Wichita Falls, Texas

Date: 1950
Creator: Griffith, R. Francis
Description: Interest is a guiding force in helping an individual to realize the pattern he is making through his day by day experiences. All children have not had the same experiences. They may or may not be interested in the same activity. It has been said that behavior is caused. If behavior is caused, then, to know the interests of children may be very valuable in diverting or guiding their activities which are desirable to help them better fit themselves to the society in which they live. Thus, the problem of this thesis is to discover the interests and activities of a seventh-grade group of boys and girls attending Huey School, Wichita Falls, Texas.
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Interests Eternal and Perpetual:  British Foreign Policy and the Royal Navy in the Spanish Civil War, 1936 - 1937

Interests Eternal and Perpetual: British Foreign Policy and the Royal Navy in the Spanish Civil War, 1936 - 1937

Date: August 2000
Creator: Sanchez, James
Description: This thesis will demonstrate that the British leaders saw the policy of non-intervention during the Spanish Civil War as the best option available under the circumstances, and will also focus on the role of the Royal Navy in carrying out that policy. Unpublished sources include Cabinet and Admiralty papers. Printed sources include the Documents on British Foreign Policy, newspaper and periodical articles, and memoirs. This thesis, covering the years 1936-37, is broken down into six chapters, each covering a time frame that reflected a change of policy or naval mission. The non-intervention policy was seen as the best available at the time, but it was shortsighted and ignored potentially serious long-term consequences.
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