University of North Texas

About: University of North Texas is a education organization based out in Denton, Texas, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 11866 authors who have published 26984 publications receiving 705376 citations. The organization is also known as: Fight, North Texas & UNT.

The SBSM Guide to Actigraphy Monitoring: Clinical and Research Applications

Abstract: Actigraphs are compact, lightweight, computerized accelerometer-based devices that have been used to evaluate sleep and wake in humans for nearly four decades.1 While polysomnography (PSG) continue...

Catalytic Mechanisms of Sulfur-Doped Graphene as Efficient Oxygen Reduction Reaction Catalysts for Fuel Cells

Abstract: Density functional theory (DFT) was applied to study sulfur-doped graphene clusters as oxygen reduction reaction (ORR) cathode catalysts for fuel cells. Several sulfur-doped graphene clusters with/without Stone–Wales defects were investigated and their electronic structures, reaction free energy, transition states, and energy barriers were calculated to predict their catalytic properties. The results show that sulfur atoms could be adsorbed on the graphene surface, substitute carbon atoms at the graphene edges in the form of sulfur/sulfur oxide, or connect two graphene sheets by forming a sulfur cluster ring. These sulfur-doped graphene clusters with sulfur or sulfur oxide locating at graphene edges show electrocatalytic activity for ORR. Catalytic active sites distribute at the zigzag edge or the neighboring carbon atoms of doped sulfur oxide atoms, which possess large spin or charge density. For those being the active catalytic sites, sulfur atoms with the highest charge density take a two-electron tran...

The influence of CO2 concentration on stomatal density

Abstract: summary A survey of 100 species and 122 observations has shown an average reduction in stomatal density of 14.3% (SE ±2.2 %) with CO2 enrichment, with 74% of the cases exhibiting a reduction in stomatal density. A sign test demonstrated that stomatal density decreases, in response to CO2, significantly more often than expected by chance. Repeated observations on the same species indicated a significant repeatability in the direction of the stomatal response. Analyses which removed the potential effect of taxonomy on this data set showed no significant patterns in the dependency of the degree of stomatal change on growth form (woodiness vs. non-woodiness; trees vs. shrubs), habitat (cool vs. warm) or stomatal distribution on the leaf (amphi- vs. hypostomatous). Forty-three of the observations had been made in controlled environments and under a typical range in CO., enrichment of 350–700 μmol mol−1. For these cases the average stomatal density declined by 9% (SE ± 3.3%) and 60% of the cases showed reductions in stomatal density. When analyses were restricted to these 43 observations, amphistomatous samples more frequently had greater changes in stomatal density than did hypostomatous samples. The degree of reduction in stomatal density with increasing CO2 increases with initial stomatal density, after the influence of taxonomy is removed using analyses of independent contrasts. When the data were examined for patterns that might be due explicitly to the effects of relatedness, the subclasses of the Hamamelidae and the Rosidae showed highly significant reductions in stomatal density with CO2 (87% of the species studied in the Hamamelidae and 80% of the species in the Rosidae showed reduction with CO2 enrichment) and correlations between initial stomatal density and degree of reduction in stomatal density. The species sampled in the Hamamelidae were dominantly trees, whereas herbs dominated the species in the Rosidae. There were insufficient species studied at lower taxonomic levels to warrant further statistical analyses. This problem results from experimental and observational data being most often restricted to one species per taxonomic level, typically up to the level of order, a feature which can severely limit the extraction of taxonomically-related and ecologically-related plant responses.

Counseling for Spiritual Wellness: Theory and Practice.

Abstract: Spiritual wellness is an emerging area of interest in counseling. It still lacks clarity, however, in definition and application. To increase familiarity with and encourage counselor intervention regarding the spiritual dimension, the authors of this article attempt to define more clearly the concept of spiritual health and to describe ways to use techniques for the enhancement of spiritual wellness and the advancement of spiritual development.

With Malice toward Some: How People Make Civil Liberties Judgments

Abstract: Preface: Political tolerance and democratic life Part I. Theoretical Background and Overview: 1. Political tolerance and democratic practice 2. Antecedent considerations and contemporary information 3. Thinking and mood Part II. Contemporary Information and Political Tolerance Judgments: 4. Tolerance judgments and contemporary information - the basic studies Appendix 4A. The basic experiments - manipulation checks Part III. Refining the Model - The Role of Antecedent Conserations as Individual Differences: 5. Threat and political tolerance 6. Democratic values as standing decisions and contemporary information 7. Source credibility, political knowledge and animus in making tolerance judgments - the Texas experiment 8. Individual differences: The influence of personality Part IV. Implications and Conclusions: 9. Intensity, motivations, and behavioral intentions 10. Human nature and political tolerance Appendices Bibliography.