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[Project Summary: EcoSpatial Information Database (ESID)]
Summary describing the work completed at AMEC Environment & Infrastructure, Inc. for the EcoSpatial Information Database (ESID). It includes background information on the project funding and sponsorship, goals, methodology, and findings.
Date:
May 2014
Creator:
AMEC Environment & Infrastructure, Inc.
Object Type:
Text
System:
The UNT Digital Library
5-Cyano-1,3-phenylene diacetate
This article discusses 5-cyano-1,3-phenylene diacetate.
Date:
May 24, 2014
Creator:
Abbassi, Bahar; Brumfield, Michela; Jones, Lloyd M.; Nesterov, Vladimir N. & Carr, Andrew J.
Object Type:
Article
System:
The UNT Digital Library
Interfacial Characterization of Chemical Vapor Deposition (Cvd) Grown Graphene and Electrodeposited Bismuth on Ruthenium Surface
Graphene receives enormous attention owing to its distinctive physical and chemical prosperities. Growing and transferring graphene to different substrates have been investigated. The graphene growing on the copper substrate has an advantage of low solubility of carbon on the copper which allow us to grow mostly monolayer graphene. Graphene sheet of few centimeters can be transferred to 300nm silicon oxide and quartz crystal pre-deposited with metal like Cu and Ru. Characterization of the graphene has been done with Raman and contact angle measurement and recently quartz crystal microbalance (QCM) has been employed. The underpotential deposition (UPD) process of Bi on Ru metal surface is studied using electrochemical quartz crystal microbalance (EQCM) and XPS techniques. Both Bi UPD and Bi bulk deposition are clearly observed on Ru in 1mM Bi (NO3)3/0.5M H2SO4. Bi monolayer coverage calculated from mass (MLMass) and from charge (MLCharge) were compared with respect to the potential scanning rates, anions and ambient controls. EQCM results indicate that Bi UPD on Ru is mostly scan rate independent but exhibits interesting difference at the slower scan. Bi UPD monolayer coverage calculated from cathodic frequency change (ΔfCathodic) is significantly smaller than the monolayer coverage derived from integrated charge under the cathodic …
Date:
May 2014
Creator:
Abdelghani, Jafar
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Source Apportionment Analysis of Measured Volatile Organic Compounds in Corpus Christi, Texas
Corpus Christi among of the largest industrialized coastal urban areas in Texas. The strategic location of the city along the Gulf of Mexico allows for many important industries and an international business to be located. The cluster of industries and businesses in the region contribute to the air pollution from emissions that are harmful to the environment and to the people living in and visiting the area. Volatile organic compounds (VOC) constitute an important class of pollutants measured in the area. The automated gas chromatography (Auto GC) data was collected from Texas Commission of Environmental Quality (TCEQ) and source apportionment analysis was conducted on this data to identify key sources of VOC affecting this study region. EPA PMF 3.0 was employed in this sources apportionment study of measured VOC concentration during 2005 - 2012 in Corpus Christi, Texas. The study identified nine optimal factors (Source) that could explain the concentration of VOC at two urbane monitoring sites in the study region. Natural gas was found to be the largest contributor of VOC in the area, followed by gasoline and vehicular exhaust. Diesel was the third highest contributor with emissions from manufacturing and combustion processes. Refineries gases and evaporative fugitive emissions …
Date:
May 2014
Creator:
Abood, Ahmed T.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
On the Solubility of Quercetin
Article discussing the solubility of quercetin. The authors have applied a methodology based on linear free energy equations for water-solvent and gas-solvent partitions to study solubilities.
Date:
May 15, 2014
Creator:
Abraham, M. H. (Michael H.) & Acree, William E. (William Eugene)
Object Type:
Article
System:
The UNT Digital Library
Development of a Cost Effective Wireless Sensor System for Indoor Air Quality Monitoring Applications
Poor air quality can greatly affect the public health. Research studies indicate that indoor air can be more polluted than the outdoor air. An indoor air quality monitoring system will help to create an awareness of the quality of air inside which will eventually help in improving it. The objective of this research is to develop a low cost wireless sensor system for indoor air quality monitoring. The major cost reduction of the system is achieved by using low priced sensors. Interface circuits had to be designed to make these sensors more accurate. The system is capable of measuring carbon dioxide, carbon monoxide, ozone, temperature, humidity and volatile organic compounds. The prototype sensor node modules were developed. The sensor nodes were the connected together by Zigbee network. The nodes were developed in such a way that it is compact in size and wireless connection of sensor nodes enable to collect air quality data from multiple locations simultaneously. The collected data was stored in a computer. We employed linear least-square approach for the calibration of each sensor to derive a conversion formula for converting the sensor readings to engineering units. The system was tested with different pollutants and data collected was …
Date:
May 2014
Creator:
Abraham, Sherin
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Exploratory Analysis of Social E-health Behavior
Extant literature has documented well that people seek health information via the internet as patients and consumers. Much less, however, is known about interaction and creation behaviors in the development of new online health information and knowledge. More specifically, generalizable sociodemographic data on who engages in this online health behavior via social media is lacking in the sociological literature. The term “social e-health” is introduced to emphasize the difference between seeking behaviors and interaction and creation behaviors. A 2010 dataset of a large nationally representative and randomly sampled telephone survey made freely available from the Pew Research Center is used to examine social e-health behavior according to respondents’ sociodemographics. The dependent variable of social e-health behavior is measured by 13 survey questions from the survey. Gender, race, ethnicity, age, education, and income are used as independent variables. Logistic regression analysis was used to determine the odds of engagement in social e-health behavior based on the sociodemographic predictors. The social determinants of health and digital divide frameworks are used to help explain why socioeconomic variances exist in social e-health behavior. The findings of the current study suggest that predictable sociodemographic patterns along the dimensions of gender, race, age, education, and income …
Date:
May 2014
Creator:
Acadia, Spencer
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Commentary on "Study of Assorted Interactions of an Ionic Liquid in Significant Solvent Systems using Compensated Equation of Fuoss Conductance and Vibrational Mode"
Article offering commentary on the article titled "Study of assorted interactions of an ionic liquid in significant solvent systems using compensated equation of fuoss conductance and vibrational mode."
Date:
May 1, 2014
Creator:
Acree, William E. (William Eugene)
Object Type:
Article
System:
The UNT Digital Library
National Healthcare Disparities Report 2013
This report summarizes data gathered to address three key questions: what is the status of health care quality, access and disparities in the United States, How have health care quality; access and disparities changed over time; where are health care quality, access, and disparities improving and where are they getting worse.
Date:
May 2014
Creator:
Agency for Healthcare Research and Quality
Object Type:
Report
System:
The UNT Digital Library
Family Structure and Marijuana Use Among Adolescents
Family structure as a predictive variable of juvenile delinquency has been studied for the last hundred years. This relationship originated due to societal belief that divorce was detrimental to adolescents. Due to the changing societal roles in the United States, family structure has been changing. More children are growing up in non-intact families, such as single-parent households, households with stepparents, cohabitating families, and households without a parent present. To study the effect family structure has on juvenile delinquency, researchers have utilized social control theory, differential association, self-control theory and general strain theory to conceptualize variables to explain why family structure influences delinquent behavior. A review of previous literature on this topic indicates that living in intact households, which are households with two biological parents who are married, have, on average, the lowest rates of delinquency. This thesis investigates the relationship between family structure and lifetime marijuana use among eighth and tenth grade adolescents in the United States through the use of secondary data analysis of Monitoring the Future Study, 2012. The results provide support for the relationship between family structure and lifetime marijuana use.
Date:
May 2014
Creator:
Aguilar, Jamie M.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Low Leakage Asymmetric Stacked Sram Cell
Memory is an important part of any digital processing system. On-chip SRAM can be found in various levels of the memory hierarchy in a processor and occupies a considerable area of the chip. Leakage is one of the challenges which shrinking of technology has introduced and the leakage of SRAM constitutes a substantial part of the total leakage power of the chip due to its large area and the fact that many of the cells are idle without any access. In this thesis, we introduce asymmetric SRAM cells using stacked transistors which reduce the leakage up to 26% while increasing the delay of the cell by only 1.2% while reducing the read noise margin of the cell by only 15.7%. We also investigate an asymmetric cell configuration in which increases the delay by 33% while reduces the leakage up to 30% and reducing the read noise margin by only 1.2% compared to a regular SRAM cell.
Date:
May 2014
Creator:
Ahrabi, Nina
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Space in Space: Privacy Needs for Long-Duration Spaceflight
Space exploration is a uniquely human activity. As humans continue to push the limits of exploring the unknown, they have sought knowledge supporting the sustenance of life in outer space. New technologies, advancements in medicine, and rethinking what it means to be a “community” will need to emerge to support life among the stars. Crews traveling beyond the Moon will rely on the development of new technologies to support the technological aspects of their missions as well as their quality of life while away from Earth. Likewise, through advancements in medicine, scientists will need to address remaining questions regarding the effects of long-duration spaceflight on the human body and crew performance. Space explorers must learn to utilize these new technologies and medical advancements while learning to adapt to their new environment in space and as a space community. It is important that researchers address these issues so that human survival beyond Earth is not only achievable but so that life among the stars is worth living and sustaining. This thesis addressed these issues in an attempt to extend the trajectory of space exploration to new horizons.
Date:
May 2014
Creator:
Aiken, Jo
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Use of Social Media in Informal Scientific Communication Among Scholars: Modeling the Modern Invisible College
The concept of the invisible college is a key focus of scientific communication research with many studies on this topic in the literature. However, while such studies have contributed to an understanding of the invisible college, they have not adequately explained the interaction of social and structural processes in this phenomenon. As a consequence, past research has described the invisible college differently based on researchers’ perspectives, resulting in misinterpretations or inconsistent definitions of the relevant social and structural processes. Information science and related disciplines have focused on the structural processes that lead to scholarly products or works while placing less emphasis on the social processes. To advance understanding of the invisible college and its dimensions (including both social processes and structural processes), a proposed model (Modern Invisible College Model, MICM) has been built based on the history of the invisible college and Lievrouw’s (1989) distinction between social and structural processes. The present study focuses on the social processes of informal communication between scholars via social media, rather than on the structural processes that lead to scholarly products or works. A developed survey and an employed quantitative research method were applied for data collection. The research population involved 77 scholars from …
Date:
May 2014
Creator:
Algarni, Mohammed Ayedh
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Nuestra Voz De North Texas (Fort Worth, Tex.), Vol. 1, No. 7, Ed. 1, May/June 2014
Newspaper providing news and information to the Tarrant and Dallas County Latino communities along with advertising.
Date:
May 2014
Creator:
Alvarado, Felix
Object Type:
Newspaper
System:
The Portal to Texas History
Thematic and Formal Narrative in Respighi’s Sinfonia Drammatica
Respighi’s scarcely-known orchestral work Sinfonia Drammatica lives up to its title by evoking a narrative throughout the course of its three movements. In this dissertation, I argue how the work’s surface, subsurface, and formal elements suggest this narrative which emerges as a cycle of rising and falling dramatic tension. I explain how Respighi constructs the work’s narrative in the musical surface through a diverse body of themes that employ three motives of contour. The disposition and manipulation of these motives within the themes suggest frequent fluctuations of the level of conflict throughout the symphony as a whole. To show the involvement of musical forms in the work’s narrative, I employ an approach which integrates harmony and thematic behavior. I utilize analytical methods from the current Formenlehre, including terms from James Hepokoski and Warren Darcy’s sonata deformation theory and William Caplin’s theories of formal functions to elucidate ties between the forms of the Sinfonia Drammatica’s movements and those of conventional sonata forms of the late-eighteenth century. This dissertation also employs Heinrich Schenker’s theories of structures, voice leading, and reduction to illustrate large-scale aspects of the Sinfonia Drammatica’s narrative. The resulting analyses show Respighi’s elaborations of common structural paradigms which serve to …
Date:
May 2014
Creator:
Amato, Alexander G.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Southwest Retort, Volume 66, Number 9, May 2014
This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date:
May 2014
Creator:
American Chemical Society. Dallas/Fort Worth Section.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Consumer Shopping Motivations with Facebook Retailers: Utilitarian Versus Hedonic
Retailers increasingly are connecting with consumers using social media. This two-way, networked communication method facilitates word-of-mouth that may ultimately impact retailer loyalty. The purpose of this study was to examine motivations of consumers’ purchase intention from apparel Facebook retailers, and the relationship between purchase intention and loyalty. Consumer motivations were examined in terms of the utilitarian values of cost, convenience, and information and the hedonic values of experiential shopping, bargain perception, sociability, and curiosity. The relationship of purchase intention and loyalty also was investigated. The instrument was developed from existing scales drawn from literature. A consumer panel (N = 250) of Facebook users that connect to apparel retailers was used to collect data through an online Qualtrics survey. Statistical analysis included descriptive statistics of frequency and crosstab distributions, factor analysis, and regression analysis. Factor analysis resulted in four dimensions including convenience, information, experience, and bargains. All motivators were found to be significantly related to both purchase intention and loyalty for this consumer group. The variable with the strongest relationship to both purchase intention and loyalty was experience. Additionally, a strong relationship was found between purchase intention and loyalty. Lastly, practical business implications are reviewed, in addition to limitations of the …
Date:
May 2014
Creator:
Anderson, Kelley B.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The European Parliament
This report mainly discusses The European Parliament which is a key institution of 28 member European Union. The role of the European Parliament in the legislative has expanded steadily over time as the scope of EU policy has grown.
Date:
May 19, 2014
Creator:
Archick, Kristin
Object Type:
Report
System:
The UNT Digital Library
Crisis in the Central African Republic
This report provides background on the evolving political, security, and humanitarian crisis in the Central African Republic (CAR), which began when a fractious rebel coalition seized control of the central government in March 2013. The report also describes U.S. policy responses and analyzes possible issues for Congress, including oversight of U.S. humanitarian assistance and support for international stabilization efforts in CAR.
Date:
May 14, 2014
Creator:
Arieff, Alexis
Object Type:
Report
System:
The UNT Digital Library
Bryophyte-Cyanobacteria Associations during Primary Succession in Recently Deglaciated Areas of Tierra del Fuego (Chile)
Article on bryophyte-cyanobacteria associations during primary succession in recently deglaciated areas of Tierra del Fuego (Chile).
Date:
May 12, 2014
Creator:
Arróniz-Crespo, María; Pérez-Ortega, Sergio; De Los Ríos, Asunción; Green, T. G. Allan; Ochoa-Hueso, Raúl; Casermeiro, Miguel Ángel et al.
Object Type:
Article
System:
The UNT Digital Library
Ensemble: 2014-05-12 – Aubrey ISD Bands
Access:
Use of this item is restricted to the UNT Community
Band concert performed in the UNT College of Music Winspear Hall.
Date:
May 12, 2014
Creator:
Aubrey High School. Symphonic Band.
Object Type:
Video
System:
The UNT Digital Library
Ensemble: 2014-05-13 – Aubrey ISD Bands
Access:
Use of this item is restricted to the UNT Community
Band concert performed at the UNT College of Music Winspear Hall.
Date:
May 13, 2014
Creator:
Aubrey Middle School. 7th/8th Concert Band.
Object Type:
Video
System:
The UNT Digital Library
Prescription Drug Abuse
This report examines prescription drug abuse in the United States. An estimated 6.8 million individuals currently abuse prescription drugs in the United States. Unlike policy on street drugs, federal policy on prescription drug abuse is complicated by the need to maintain access to prescription controlled substances (PCS) for legitimate medical use. The federal government has several roles in reducing prescription drug abuse.
Date:
May 21, 2014
Creator:
Bagalman, Erin; Sacco, Lisa N.; Thaul, Susan & Yeh, Brian T.
Object Type:
Report
System:
The UNT Digital Library
Shall We Dance? Teaching Parents the Communication Dance to Enhance Generalized Communication in Their Children
Children diagnosed with autism exhibit deficits in communication that impact their ability to control their immediate environment. Recent research on mand training has been criticized for producing a limited number of mand topographies over a long span of time with limited generalization to novel environments. There is a body of research, however, that successfully establishes larger repertoires. Training parents as change agents may mediate generalization by teaching under naturally maintaining contingencies. Additional effects of parent training may reduce parent reports of stress, increase favorable quality of parent-child interactions, and increase reports of parental self-efficacy. The current study evaluated the effects of a generalized training framework to teach parents how to target generalized mands and expand their child’s communicative topographies. The effects of the training were evaluated using a non-concurrent multiple baseline across participants and skills. Results indicated that parents were able to effectively teach their child to mand for a variety of items and events and to substantially increase the number of different mand topographies and expand the topographies the child emitted. Parents were observed to have higher overall confidence and lower overall stress following intervention. The current study builds on previous research on generalized teaching strategies for parents that …
Date:
May 2014
Creator:
Baker, Jacqueline R.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library