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636 Matching Results
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Field Validation of Zero Energy Lab Water-to-Water Ground Coupled Heat Pump Model
Heat pumps are a vital part of each building for their role in keeping the space conditioned for the occupant. This study focuses on developing a model for the ground-source heat pump at the Zero Energy lab at the University of North Texas, and finding the minimum data required for generating the model. The literature includes many models with different approaches to determine the performance of the heat pump. Each method has its pros and cons. In this research the equation-fit method was used to generate a model based on the data collected from the field. Two experiments were conducted for the cooling mode: the first one at the beginning of the season and the second one at the peak of the season to cover all the operation conditions. The same procedure was followed for the heating mode. The models generated based on the collected data were validated against the experiment data. The error of the models was within ±10%. The study showed that the error could be reduced by 20% to 42% when using the field data to generate the model instead of the manufacturer’s catalog data. Also it was found that the minimum period to generate the cooling …
Date:
May 2016
Creator:
Abdulameer, Saif
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Ozone Pollution of Shale Gas Activities in North Texas
The effect of shale gas activities on ground-level ozone pollution in the Dallas-Fort Worth area is studied in detail here. Ozone is a highly reactive species with harmful effects on human and environment. Shale gas development, or fracking, involves activities such as hydraulic fracturing, drilling, fluid mixing, and trucks idling that are sources of nitrogen oxides (NOX) and volatile organic compounds (VOC), two of the most important precursors of ozone. In this study two independent approaches have been applied in evaluating the influences on ozone concentrations. In the first approach, the influence of meteorology were removed from ozone time series through the application of Kolmogorov-Zurbenko low-pass filter, logarithmic transformation, and subsequent multi-linear regression. Ozone measurement data were acquired from Texas Commission on Environmental Quality (TCEQ) monitoring stations for 14 years. The comparison between ozone trends in non-shale gas region and shale gas region shows increasing ozone trends at the monitoring stations in close proximity to the Barnett Shale activities. In the second approach, the CAMx photochemical model was used to assess the sensitivity of ozone to the NOX and VOC sources associated with shale oil and gas activities. Brute force method was applied on Barnett Shale and Haynesville Shale emission …
Date:
May 2016
Creator:
Ahmadi, Mahdi
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Nuestra Voz (Fort Worth, Tex.), Vol. 2, No. 24, Ed. 1, May 2016
Monthly newspaper providing news and information to the Tarrant, Dallas, and Denton County Latino communities along with advertising.
Date:
May 2016
Creator:
Alvarado, Felix
Object Type:
Newspaper
System:
The Portal to Texas History
Southwest Retort, Volume 68, Number 9, May 2016
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 2016
Creator:
American Chemical Society. Dallas/Fort Worth Section.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
U.S.-Nordic Relations
This report briefly discusses U.S. relations with the Nordic countries--Denmark, Finland, Iceland, Norway, and Sweden.
Date:
May 10, 2016
Creator:
Archick, Kristin
Object Type:
Report
System:
The UNT Digital Library
Determinants of Principal Pay in the State of Texas
The purpose of the study was to examine district, campus, and community determinants of principal’s salaries using a spatial econometric framework. Among the district variables business tax (p = 0.001), property tax (p < .01), and the Herfindahl Index (measure of competition) were statistically significant indicators of principal salaries. The results suggest that more affluent districts tend to pay principals higher salaries, which was expected. Regarding campus characteristics, the percent of economically disadvantaged was not a statistically sound indicator (p = 0.468), but campus enrollment was significant (p = <.01). Interestingly as the percentage of economically disadvantaged students increased, the principal salary decreased. In contrast, as student enrollment increases the salary of principals increases, suggesting that principals of larger campuses earn higher salaries. Interestingly, student achievement was not a statistically significant predictor of principals’ salary given that pay for performance in Texas is at the forefront of political debate. Among the variables examined at the community level, only the percentage of homes owner occupied (p = 0.002) was found to be a statistically significant indicator of principal salary (p = .002). The lack of evidence on reforms, such as determinants of principal salary, points to data and research deficiencies to …
Date:
May 2016
Creator:
Asbury, Elizabeth Ann
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Comprehensive Addiction and Recovery Act of 2016 (S. 524): Comparison of Senate- and House-Passed Versions
This report discusses selected differences and similarities between the Senate- and House-passed versions of the Comprehensive Addiction and Recovery Act of 2016 (CARA; S. 524), which aims to address the problem of opioid addiction in the United States. The two versions of the bill differ substantially. The scope of the differences may be illustrated by their structures: The Senate bill has 28 sections organized in 8 titles, whereas the House bill has 69 sections organized in 18 titles.
Date:
May 23, 2016
Creator:
Bagalman, Erin & Sacco, Lisa N.
Object Type:
Report
System:
The UNT Digital Library
Active Opioid Legislation in the House: In Brief
This report briefly summarizes opioid-related bills that were considered during "Opioid Week" (the week of May 9, 2016) The summaries in this report may be useful illustrations of the range of approaches Members of Congress have proposed to address the problem of opioid addiction.
Date:
May 13, 2016
Creator:
Bagalman, Erin; Sacco, Lisa N. & Rosen, Liana W.
Object Type:
Report
System:
The UNT Digital Library
Impact of Teacher and Student Ethnicity on Student Assessments
The purpose of the study was to answer the questions: Do students show greater academic success in English language arts/reading as measured by the Texas Assessment of Knowledge and Skills (TAKS) exam scores in secondary education when their teachers are the same ethinicity? Do students show greater academic success in math as measured by the TAKS exam scores in secondary education when their teachers are the same ethnicity? Minority students' success on the TAKS test was compared to the assessment scores of White students from the 2010-2011, 2011-2012, and 2012-13 school year in thre suburban school districts. This topic has been a subject of discussion since the late 10970s when Cardenas and Cardenas (1977) studied the achievement among minority students and their White peers. The conversation continued through authors such as Takei and Shouse (2008), Hays (2011), Ladson-Billings (2006), Dee (2003, 2005), and Brown (2006). To answer these research questions, a hierarchical multiple regression analysis was conducted on the data collected. Although the study verified the achievement gap between minority students and White students, the study indicated no consistent pattern corroborating that minority students were more successful when taught by teachers of the same ethnicity. In many cases, students learned …
Date:
May 2016
Creator:
Barnes, Barbara (Principal)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Influence of Urban Green Spaces on Declining Bumble Bees (Hymenoptera: Apidae)
Bumble bees (Bombus spp.) are adept pollinators of countless cultivated and wild flowering plants, but many species have experienced declines in recent decades. Though urban sprawl has been implicated as a driving force of such losses, urban green spaces hold the potential to serve as habitat islands for bumble bees. As human populations continue to grow and metropolitan areas become larger, the survival of many bumble bee species will hinge on the identification and implementation of appropriate conservation measures at regional and finer scales. North Texas is home to some the fastest-growing urban areas in the country, including Denton County, as well as at least two declining bumble bee species (B. pensylvanicus and B. fraternus). Using a combination of field , molevular DNA and GIS methods I evaluated the persistence of historic bumble bee species in Denton County, and investigated the genetic structure and connectivity of the populations in these spaces. Field sampling resulted in the discovery of both B. pensylvanicus and B. fraternus in Denton County's urban green spaces. While the relative abundance of B. fraternus in these spaces was significantly lower than historic levels gleaned from museum recors, that of B. pensylvanicus was significantly higher. Statistical analyses found …
Date:
May 2016
Creator:
Beckham, Jessica L.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Abortion and Family Planning-Related Provisions in U.S. Foreign Assistance Law and Policy
This report details legislation and policies that restrict or place requirements on U.S. funding of abortion or family planning activities abroad. The level and extent of federal funding for these activities is an ongoing and controversial issue in U.S. foreign assistance and will likely continue to be a point of contention during the 114th Congress.
Date:
May 17, 2016
Creator:
Blanchfield, Luisa
Object Type:
Report
System:
The UNT Digital Library
A Spatial Econometric Study Examining the Determinants of Principal Salaries
The lack of evidence on reforms, such as determinants of principal salary, points to data and research deficiencies to be addressed in order to learn more about their effects and make sound public policies. The purpose of the study was to examine district and community determinants of principals’ salaries using a spatial econometric framework. The findings have implications for education policy development related to pay for contribution, rather than pay based on tenure, experience, or district wealth. The quantitative study used a spatial regression approach to model school, district, and community factors as determinants of Texas high school principal’s salary. Principal salaries are viewed from several lenses in this study by considering effective outcomes of pay defined by actual salaries and market considerations for pay as defined by community, organizational and human capital variables. Literature from the private sector as well as from the public school setting was used as a theoretical underpinning for the hypotheses set forth in this study. The findings provide empirical insights regarding how principal salaries are determined. The study found a statistically significant spatial autocorrelation relationship at p<.05 confirming geographic locations is a robust influence on principal salaries. After controlling for the spatial autocorrelation the …
Date:
May 2016
Creator:
Bland, J. Edward
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Leonard Graphic (Leonard, Tex.), Vol. 126, No. 18, Ed. 1 Thursday, May 5, 2016
Weekly newspaper from Leonard, Texas that includes local, state, and national news along with advertising.
Date:
May 5, 2016
Creator:
Blevins, Betsy
Object Type:
Newspaper
System:
The Portal to Texas History
The Leonard Graphic (Leonard, Tex.), Vol. 126, No. 19, Ed. 1 Thursday, May 12, 2016
Weekly newspaper from Leonard, Texas that includes local, state, and national news along with advertising.
Date:
May 12, 2016
Creator:
Blevins, Betsy
Object Type:
Newspaper
System:
The Portal to Texas History
The Leonard Graphic (Leonard, Tex.), Vol. 126, No. 20, Ed. 1 Thursday, May 19, 2016
Weekly newspaper from Leonard, Texas that includes local, state, and national news along with advertising.
Date:
May 19, 2016
Creator:
Blevins, Betsy
Object Type:
Newspaper
System:
The Portal to Texas History
The Leonard Graphic (Leonard, Tex.), Vol. 126, No. 21, Ed. 1 Thursday, May 26, 2016
Weekly newspaper from Leonard, Texas that includes local, state, and national news along with advertising.
Date:
May 26, 2016
Creator:
Blevins, Betsy
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 96, No. 87, Ed. 1 Sunday, May 1, 2016
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
May 1, 2016
Creator:
Bloom, David
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 96, No. 88, Ed. 1 Tuesday, May 3, 2016
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
May 3, 2016
Creator:
Bloom, David
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 96, No. 89, Ed. 1 Wednesday, May 4, 2016
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
May 4, 2016
Creator:
Bloom, David
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 96, No. 90, Ed. 1 Thursday, May 5, 2016
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
May 5, 2016
Creator:
Bloom, David
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 96, No. 91, Ed. 1 Friday, May 6, 2016
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
May 6, 2016
Creator:
Bloom, David
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 96, No. 92, Ed. 1 Sunday, May 8, 2016
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
May 8, 2016
Creator:
Bloom, David
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 96, No. 93, Ed. 1 Tuesday, May 10, 2016
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
May 10, 2016
Creator:
Bloom, David
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 96, No. 94, Ed. 1 Wednesday, May 11, 2016
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
May 11, 2016
Creator:
Bloom, David
Object Type:
Newspaper
System:
The Portal to Texas History