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373 Matching Results
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Influence of high heating rates on evolution of oxides on directed laser energy additively fabricated IN718
Article studying material response under dynamic short duration-high temperature oxidation.
Date:
September 1, 2021
Creator:
Mazumder, Sangram
Object Type:
Article
System:
The UNT Digital Library
District Reliance by Service Function: A Study of Public Financing of American Special Districts
This article provides an exploratory investigation of special district finance reliance from expenditure reliance of general–purpose governments on special districts’ service delivery and financing mode of special districts. The study shows that special districts have replaced the role of general-purpose governments and which revenue sources districts rely on the most.
Date:
April 1, 2021
Creator:
Park, HyungGun & Shi, Yu
Object Type:
Article
System:
The UNT Digital Library
Pulmonary compliance and lung volume varies with ecomorphology in anuran amphibians: implications for ventilatory-assisted lymph flux
This article examining the correlation between pulmonary compliance, lung volume, and lymph flux rates in anurans. The findings of this article suggest that lymph mobilization capacity may explain some of the variation in pulmonary compliance and lung volume in anurans.
Date:
October 1, 2011
Creator:
Hedrick, Michael; Hillman, Stanley S.; Drewes, Robert C. & Withers, Philip C.
Object Type:
Article
System:
The UNT Digital Library
Upper lethal temperatures of Northern Bobwhite embryos and the thermal properties of their eggs
This article explores the upper lethal temperature for Bobwhite eggs. Results find that thermal tolerances of Northern Bobwhite embryos are high, indicating an adaptation to the naturally occurring temperature extremes in the Bobwhite's environment. However, the results also indicate that high temperatures could have plausibly contributed to the population decline observed in the Bobwhite's semi-arid range.
Date:
January 1, 2012
Creator:
Reyna, Kelly S. & Burggren, Warren W.
Object Type:
Article
System:
The UNT Digital Library
Evaluation of Metadata Change in Authority Data Over Time: An Effect of a Standard Evolution
This article presents some results of the content analysis study that explores the authority data change over time in response to change in standards. Authority data describes persons, institutions, places, events, and works, as well as relations between them. This study contributes to the understanding of metadata change and its relation to functionality of authority records and improved information access.
Date:
February 1, 2019
Creator:
Zavalina, Oksana & Zavalin, Vyacheslav
Object Type:
Article
System:
The UNT Digital Library
Formulating a Scalable Approach to Patron-Requested Digitization in Archives
This article examines how archives were forced to rethink their modes of providing access to physical collections because of the coronavirus of 2019 (COVID-19). Whereas difficult copyright questions raised by reproducing items could previously be skirted by requiring researchers to work with materials in person, the long-term closure of reading rooms and decrease in long-distance travel mean that archives need a workflow for handling user digitization requests that is scalable and requires consulting only easily identifiable information and, assuming full reproduction is off the table, reproducing items in a collection under 17 U.S.C. § 108 or through a strategy of rapid risk assessment. There is a challenge in creating a policy that will work across different formats and genres of archival materials, so this article offers some suggestions for how to think about these parameters according to US copyright law and calls for a committee of experts to work out a model policy that could serve remote users of archival collections even after the COVID-19 crisis has passed.
Date:
June 1, 2021
Creator:
Hawkins, Kevin S. & Judkins, Julie
Object Type:
Article
System:
The UNT Digital Library
The Impact of Mental Aerobics Training on Older Adults
This article investigates the impact of mental aerobics on older adults. Findings support the conclusion that MA can be an effective intervention in improving older adults’ affectivity, everyday task self-efficacy, and self-rated health.
Date:
May 1, 2015
Creator:
Hayslip, Bert; Paggi, Kay & Caballero, Daniela
Object Type:
Article
System:
The UNT Digital Library
The Internet and College Students' Motivation to Vote
This article investigates the impact of the political information available on-line on college students’ motivation to vote. The results illustrate that not only politicians, but educators should be cognizant of this civic engagement process. Schools and teachers of all levels are one the front lines of the battle to create a more informed, more involved citizenry; higher education has a strong influence on motivation to vote.
Date:
March 1, 2004
Creator:
White, Amy E. & King, Kimi L.
Object Type:
Article
System:
The UNT Digital Library
Artificially Structured Boundary for a high purity ion trap or ion source
This article proposes a plasma enclosed by an Artificially Structured Boundary (ASB) as an alternative to existing ion source assemblies. In accelerator applications, many ion sources can have a limited lifetime or frequent service intervals due to sputtering and eventual degradation of the ion source assembly. Ions are accelerated towards the exit canal of positive ion sources, whereas, due to the biasing scheme, electrons or negative ions are accelerated towards the back of the ion source assembly.
Date:
March 27, 2014
Creator:
Pacheco, J. L.; Ordonez, Carlos A. & Weathers, Duncan L.
Object Type:
Article
System:
The UNT Digital Library
Phase space of positron trajectories exiting a charged particle source through a magnetic field point cusp
This article presents a configuration of magnetic fields using properties of cylindrically symmetric permanent magnets as a candidate to produce a high purity charged particle source or trap. Cylindrically symmetric hollow permanent magnets produce magnetic field point cusps on the axis of symmetry. A magnetic field point cusp reflects all particles that lie outside a narrow region of phase space, a region dependent on particle kinetic energies and on the magnetic field intensity.
Date:
December 30, 2013
Creator:
Kiester, A. S.; Pacheco, J. L.; Ordonez, Carlos A. & Weathers, Duncan L.
Object Type:
Article
System:
The UNT Digital Library
Effect of Elevated Temperatures on Properties of Blended Cements with Clinoptilolite
Article investigates the effect of elevated temperature on properties of clinoptilolite blended cements. Clinoptilolite was used at 5 %, 10 %, 15 % and 20 % replacement by weight for Portland cement while sand and water quantities were kept constant in all mix designs. The mortars with 5 % or 10 % cliniptilolite substitution have compressive strength exceeding 42.5 MPa after being subjected to 400 °C and 500 °C.
Date:
December 1, 2016
Creator:
Beycioglu, Ahmet; Yılmaz Aruntaș, Hüseyin; Gencel, Osman; Hagg Lobland, Haley E.; Şamandar, Ayhan & Brostow, Witold, 1934-
Object Type:
Article
System:
The UNT Digital Library
A New Way to Understand and Address Women’s Health in the Context of Complex Systems: Self-organizing Criticality
Article proposes applying concepts from nonlinear science developed and employed by physicists, economists, and meteorologists to women's health issues.
Date:
January 1, 2016
Creator:
Mancuso, Peggy; Liu, Fuqin; Restrepo, Elizabeth; Hamilton, Patricia; Grigolini, Paolo & Zou, Lin
Object Type:
Article
System:
The UNT Digital Library
Coprologic survey of endoparasites from Darwin’s fox (Pseudalopex fulvipes) in Chiloé, Chile
Article on parasite presence in the critically endangered Darwin's fox (Pseudalopex fulvipes) in Chile. Parasites found include species and genera reported for the first time in Darwin's fox.
Date:
January 1, 2012
Creator:
Jiménez, Jaime E.; Briceño, C.; Alcaíno, H.; Vásquez, P.; Funk, S. & González-Acuña, D.
Object Type:
Article
System:
The UNT Digital Library
Molecular Markers of Neuropsychological Functioning and Alzheimer's Disease
Article examines molecular markers of neuropsychological functioning among elders with and without Alzheimer's disease (AD) and determine the predictive ability of combined molecular markers and select neuropsychological tests in detecting disease presence. This work provides the foundation for the generation of a point‐of‐care device that can be used to screen for AD.
Date:
March 1, 2015
Creator:
Edwards, Melissa; Balldin, Valerie Hobson; Hall, James R. & O'Bryant, Sid E.
Object Type:
Article
System:
The UNT Digital Library
Timescales of learning in the basal ganglia and the hippocampus
This article is a commentary on "A role for the medial temporal lobe in feedback-driven learning: evidence from amnesia" by Foerde, K., Race, E., Verfaellie, M.,and Shohamy, D. (2013). It covers the idea that environmental feedback plays an important role with respect to both basal ganglia and hippocampus based learning. Evidence that both the hippocampus and the striatum are involved in reinforcement learning is given. This article suggests that future research use a more precise measurement of the two structures’ sensitivities to delay. The general picture suggests that the basal ganglia and the hippocampus share overlapping sensitivity to reinforcement signals, although at a different timescale.
Date:
August 1, 2013
Creator:
Ortu, Daniele; Skavhaug, Ida M. & Vaidya, Manish
Object Type:
Article
System:
The UNT Digital Library
Effect of selection for commercially productive traits on the plasticity of cardiovascular regulation in chicken breeds during embryonic development
Article investigates basic cardiovascular physiology in the Red Junglefowl, the broiler, and the White Leghorn breeds at 90% of incubation. The authors aimed to identify breed-specific features of arterial blood pressure and heart rate as well as the physiological mechanisms regulating them. They concluded that selection for rapid growth shifts cardiovascular regulatory plasticity to emphasize mechanisms that modulate pressure, and that selection for egg-laying capacity emphasizes mechanisms that modulate heart rate.
Date:
October 1, 2012
Creator:
Crossley, Dane A., II & Altimiras, J.
Object Type:
Article
System:
The UNT Digital Library
A unified, contemporary approach to teaching energy in introductory physics
Article proposes a more coherent, contemporary approach to the teaching of energy in introductory physics courses that offers students a principled way to avoid confusions.
Date:
July 1, 2019
Creator:
Chabay, Ruth; Sherwood, Bruce & Titus, Aaron
Object Type:
Article
System:
The UNT Digital Library
IslandCafe: Compositional Anomaly and Feature Enrichment Assessment for Delineation of Genomic Islands
Article discusses IslandCafe, a proposed method for genomic island detection.
Date:
October 1, 2019
Creator:
Jani, Mehul & Azad, Rajeev K.
Object Type:
Article
System:
The UNT Digital Library
Effects of UV Stabilizers on Polypropylene Outdoors
This article looks at hindered amine light stabilizers (HALSs) and nano ZnO were used to stabilize polypropylene (PP) film-based formulations that were exposed to ultraviolet (UV) light for different lengths of time, simulating the harsh outdoor weather of Dallas, Texas, USA. UV doses applied in our laboratory are 121 times larger than the UV dose provided by the sunlight in Texas. 15 different compositions were studied. The combination of HALSs and nano-ZnO stabilizers makes the PP films harder—which is important for some PP applications, such as toy manufacturing.
Date:
April 1, 2020
Creator:
Brostow, Witold, 1934-; Lu, Xinyao; Gencel, Osman & Osmanson, Allison T.
Object Type:
Article
System:
The UNT Digital Library
Solid State Optical Microlasers Fabrication via Microfluidic Channels
Paper proposes the use of a microfluidic channel with flow focusing technique to fabricate solid state polymeric microlasers to precisely control sizes for mass production.
Date:
March 1, 2020
Creator:
Manzo, Maurizio & Cavazos, Omar
Object Type:
Article
System:
The UNT Digital Library
Expendable Graphite as an Efficient Flame-Retardant for Novel Partial Bio-Based Rigid Polyurethane Foams
Study presents a novel bio-polyol synthesized using carvone, an extract from caraway, spearmint, or dill seeds via facile thiol-ene reaction.
Date:
May 1, 2020
Creator:
de Souza, Felipe M.; Choi, Jonghyun; Bhoyate, Sanket; Kahol, Pawan K. & Gupta, Ram K.
Object Type:
Article
System:
The UNT Digital Library
Preface 2004
Introduction to the 2004 edition of The Eagle Feather.
Date:
October 1, 2004
Creator:
Cox, Gloria C. & Eve, Susan Brown
Object Type:
Article
System:
The UNT Digital Library
Multimodal switching of a redox-active macrocycle
This article looks at molecules that can exist in multiple states with the possibility of toggling between those states based on different stimuli. They have potential for use in molecular switching or sensing applications. The coupling of two different oxidation states with two different charge-transfer states within one macrocyclic scaffold delivers up to five different optical outputs. This molecular switching manifold exploits intramolecular coupling of multiple redox active substituents within a single molecule.
Date:
March 1, 2019
Creator:
Payne, Daniel T.; Webre, W. A.; Matsushita, Yoshitaka; Zhu, Nianyong; Futera, Zdeněk; Labuta, J. et al.
Object Type:
Article
System:
The UNT Digital Library
We Need Diverse Resources
This was presented at the Brick and Click conference in 2019 at Northwest Missouri State University. It focused on building a diverse collection of resources and creating a welcoming space for all.
Date:
November 1, 2019
Creator:
Monahan, Jo
Object Type:
Presentation
System:
The UNT Digital Library