State of the Climate in 2008 (open access)

State of the Climate in 2008

This report describes observations of precipitation, temperature, and other climatology metrics from different global regions.
Date: August 2009
Creator: Peterson, T. C.; Baringer, M. O.; Diamond, H. J.; Fogt, R. L.; Levy, J. M.; Richter-Menge, J. et al.
Object Type: Text
System: The UNT Digital Library
Exploring Teachers’ Constructivist Beliefs Using Talis 2013: Approaches to Training and Development (open access)

Exploring Teachers’ Constructivist Beliefs Using Talis 2013: Approaches to Training and Development

The changing landscape of demographics, technology, and diversity in the learning environment is challenging schools around the world to rethink their approaches to the implementation of high-quality teaching practices. Classroom practices are becoming more complex because educators have to ensure that their students are well-equipped with 21st century skills (e.g., Darling-Hammond, 2010; Dede, 2010; Griffin, McGaw, & Care, 2012). Educators, curriculum developers, and school administrators need to be more than experts in pedagogy. They are now required to keep up with current ideas, innovative instructional practices, and the results of a variety of educational reform efforts. Believing that teachers’ beliefs are the most important psychological construct with regard to instructional practices (Pajares, 1992) and that teachers’ beliefs are related to their choice of classroom practices and, ultimately, the students’ performance (Bybee, Taylor, Gardner, Van Scotter, Powell, Westbrook, & Landes, 2006; Staub & Stern, 2002), the author of this study utilizes the international data set of the Teaching and Learning International Study (TALIS) 2013 to examine the associations between teachers’ constructivist beliefs, their self-efficacy beliefs, professional activities, and the school principals’ instructional leadership as related to lower secondary school teachers and principals in South Korea, Finland, and Mexico. These three countries …
Date: August 2015
Creator: Angnakoon, Putthachat
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Effects of Deepwater Horizon Crude Oil on Visual Function in Teleost Fishes (open access)

Effects of Deepwater Horizon Crude Oil on Visual Function in Teleost Fishes

The Deepwater Horizon oil spill released millions of barrels of oil into the Gulf of Mexico, impacting economically and ecologically important fishes. Polycyclic aromatic hydrocarbons (PAHs) present in the oil have been shown to cause developmental impairments in early life stage fishes, such as morphological and behavioral changes related to eye formation and visual processing following PAH exposure. Prior research reported reduced eye growth in open water, pelagic species, as well as reduced photoreceptor-specific transcription factors associated with eye development following exposure to crude oil. Though changes in transcriptomic-level pathways associated with vision and visual processing have been reported, it has yet to be determined how these changes relate to physiological or behavioral-level effects in fish. Therefore, the present studies evaluated the effect of weathered crude oil on eye development and visual function in mahi-mahi, red drum, sheepshead minnow, and zebrafish larvae. Fish were assessed through several visually-mediated behavioral assays, analyzed histologically and immunohistologically, along with subsequent transcriptomic analyses and associated gene expression changes. Larvae exposed to crude oil experienced significantly reduced abilities to exhibit optomotor or optokinetic responses relative to controls, with associated reductions in retinal development. Furthermore, genes associated with eye development and phototransduction were downregulated, with subsequent …
Date: August 2018
Creator: Magnuson, Jason T
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Hexagon, Volume 95, Number 3, Fall 2004 (open access)

The Hexagon, Volume 95, Number 3, Fall 2004

Quarterly publication of the Alpha Chi Sigma chemistry fraternity containing articles related to chemistry research and the activities of the organization, including local chapters and groups.
Date: Autumn 2004
Creator: Alpha Chi Sigma
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
Migration Information Gathering by Mexican-origin Immigrants in the Pre-migration Phase (open access)

Migration Information Gathering by Mexican-origin Immigrants in the Pre-migration Phase

U.S. immigration procedures are complex and may elude the average individual seeking admission to the United States. Understanding this, the current study investigates how information resources are used by potential migrants to learn about the migratory process. Using a mixed-methods approach, I interviewed 30 Mexican immigrants with unauthorized immigration experience about the process of gathering migration information in the pre-migration phase. Qualitative data were coded using seven themes generated from the primary research questions, including: Information Resources, Resources Used During Migration, Motivation for Migration, Method of Migration, Lack of Information/Misinformation, Types of Help and Types of Information. Findings suggest that the factors motivating migrants to come to the U.S. are combined in complex ways and lack of information about legal alternatives to unauthorized migration is an important factor influencing method of migration. Also, while access to new information resources is increasing, these resources are not being tapped for migration information.
Date: December 2015
Creator: Hudson, Cassie
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Hexagon, Volume 94, Number 4, Winter 2003 (open access)

The Hexagon, Volume 94, Number 4, Winter 2003

Quarterly publication of the Alpha Chi Sigma chemistry fraternity containing articles related to chemistry research and the activities of the organization, including local chapters and groups.
Date: Winter 2003
Creator: Alpha Chi Sigma
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
The Relationship Between Environmental Barriers and Modes of Technology Transfer: A Study of United States Companies with Operations in Mexico (open access)

The Relationship Between Environmental Barriers and Modes of Technology Transfer: A Study of United States Companies with Operations in Mexico

This study is an empirical evaluation of the relationship between perceptions of the elements of the remote environment of business and the mode of transfer utilized by 90 United States companies transferring technology to Mexico. Characteristics of the technology, the company, and the industry were found, from a thorough search of the literature, to be the key aspects of technology transfer. The primary hypothesis predicted that a significant relationship would exist between perceptions of barriers and choice of transfer mode.
Date: August 1994
Creator: LeMaster, Jane
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Papers concerning Robertson's Colony in Texas, Volume 2 (open access)

Papers concerning Robertson's Colony in Texas, Volume 2

"Leftwich's Grant is the second volume in a series that is intended to document the colonization of an area in Central Texas that eventually became known as Robertson's Colony." It covers "the three years that [Robert] Leftwich spent in Mexico City and Saltillo" and includes "a complete account of his official negotiations with both the national government in Mexico City and the state government of Coahuila and Texas. It also includes documents concerning Dr. Felix Robertson, President of the Texas Association, and the group of young men who came to Texas with him in the fall of 1825 to explore the grant and survey land for the stockholders" (p. 11). The index begins on page 667.
Date: 1975
Creator: McLean, Malcolm Dallas
Object Type: Book
System: The Portal to Texas History