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137 Matching Results
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Retinal oxygen supply shaped the functional evolution of the vertebrate eye
Article explores the hypothesis that oxygen diffusion limited the evolution of retinal morphology by reconstructing the evolution of retinal thickness and the various mechanisms for retinal oxygen supply, including capillarization and acid-induced haemoglobin oxygen unloading.
Date:
December 10, 2019
Creator:
Damsgaard, Christian; Lauridsen, Henrik; Funder, Anette MD; Thomsen, Jesper S.; Desvignes, Thomas; Crossley, Dane A., II et al.
System:
The UNT Digital Library
Actinide tetra-N-heterocyclic carbene ‘sandwiches’
Article preparing highly-symmetrical, thorium and uranium octakis-carbene ‘sandwich’ complexes by ‘sandwiching’ the An(IV) cations between two anionic macrocyclic tetra-NHC ligands. The complexes are characterized by a range of experimental methods and DFT calculations.
Date:
May 10, 2021
Creator:
DeJesus, Joseph F.; Kerr, Ryan W. F.; Penchoff, Deborah A.; Carroll, Xian B.; Peterson, Charles C.; Arnold, Polly L. et al.
System:
The UNT Digital Library
The specificity of plant defences
This article discusses the specificity of plant defences.
Date:
January 10, 1980
Creator:
Dixon, R. A. & Lamb, Christopher J.
System:
The UNT Digital Library
A semi-automated method for extracting channels and channel profiles from lidar-derived digital elevation models
Article introduces a semi-automated method for extracting stream channels and channel profiles from high-resolution digital elevation models (DEMs) using image processing techniques. The method is implemented as an ArcGIS Python add-in toolbar named Channel Extraction and demonstrated using a lidar-derived DEM in a study area along the San Andreas fault in California, USA.
Date:
March 10, 2020
Creator:
Dong, Pinliang; Zhong, Ruofei; Xia, Jisheng & Tan, Shucheng
System:
The UNT Digital Library
The neuroprotective properties of palmitoylethanolamine against oxidative stress in a neuronal cell line
This article discusses the neuroprotective properties of palmitoylethanolamine against oxidative stress in a neuronal cell line.
Date:
December 10, 2009
Creator:
Duncan, Scott R.; Chapman, Kent D. & Koulen, Peter
System:
The UNT Digital Library
Teacher Qualification and the Achievement Gap in Early Primary Grades
This article examines the relationship of the qualification requirement of the No Child Left Behind Act to the goal of reducing the academic achievement gap.
Date:
August 10, 2009
Creator:
Easton-Brooks, Donald & Davis, Alan
System:
The UNT Digital Library
Reduced reflectance and altered color: The potential cost of external particulate matter accumulation on urban Rock Pigeon (Columba livia) feathers
Authors of the article state that airborne particulate matter (PM) can accumulate on feather surfaces and alter feather appearance, so they quantified PM accumulation on Rock Pigeon feathers and analyzed the spectral properties of extracted particulates. Their findings suggest that wild birds could incur an urban pollution penalty as PM accumulation has the potential to alter feather properties.
Date:
February 10, 2023
Creator:
Ellis, Jennifer L.; Ponette-González, Alexandra G.; Fry, Matthew & Johnson, Jeff A.
System:
The UNT Digital Library
The metabolic cost of turning right side up in the Mediterranean spur-thighed tortoise (Testudo graeca)
Article examining the the metabolic cost of self-righting in the terrestrial Mediterranean spur-thighed tortoise using respirometry and kinematic video analysis and comparing this to the metabolic cost of locomotion at a moderate, easily sustainable speed. The results found that self-righting is, relatively, metabolically expensive and costs around two times the mass-specific power required to walk.
Date:
January 10, 2022
Creator:
Ewart, Heather E.; Tickle, Peter G.; Sellers, William I.; Lambertz, Markus; Crossley, Dane A., II & Codd, Jonathan R.
System:
The UNT Digital Library
Social- and Content-Aware Prediction for Video Content Delivery
Article proposes a Social- and Content-aware Video content delivery Prediction method (SCVP) to address the problem of predicting whether a video will be watched by a user for efficient video content delivery in mobile social networks.
Date:
February 10, 2020
Creator:
Fan, Yuqi; Yang, Bing; Hu, Donghui; Yuan, Xiaohui & Xu, Xiong
System:
The UNT Digital Library
Using CRISPR/Cas to enhance gene expression for crop trait improvement by editing miRNA targets
Article states that gene editing tools such as CRISPR/Cas9 are often thought of as a means to prevent gene expression; however, a more subtle and yet powerful approach is the enhancement of gene expression by precise deletion of repressor sites within a gene of interest. Authors argue that gene editing of miRNA target sites is preferable over deletion of the miRNA genes themselves, given that it avoids the pitfalls of unspecific derepression of miRNA target(s) beyond the gene of interest.
Date:
January 10, 2023
Creator:
Ferreira, Savio S. & Reis, Rodrigo S.
System:
The UNT Digital Library
Bieberians at the Gate?
Article discussing theories on the evaluation of philosophy and philosophers and the peer review process.
Date:
December 10, 2012
Creator:
Frodeman, Robert; Holbrook, J. Britt & Briggle, Adam
System:
The UNT Digital Library
Electric Field Enhanced Photoluminescence of CdTe Quantum Dots Encapsulated in Poly (N-Isopropylacrylamide) Nano-Spheres
This article shows an electric field dependent collapse of the poly(N-isopropylacramide) nanospheres and employs the electric field dependence as a means to adjust the photoluminescence process of the quantum dots in a hybrid material.
Date:
November 10, 2008
Creator:
Garner, Brett W.; Cai, Tong; Hu, Zhibing & Neogi, Arup
System:
The UNT Digital Library
The “Malevolent” Benevolence: what happens to perceived immigrant threat when value priorities collide?
This article examines how self-transcending human values affect perceptions of immigrant threat. Results show that benevolence and universalism tend to affect perceived immigrant threat in opposite directions. A part of individuals’ anti-immigrant bias does not stem from strictly self-interested motivations, as often proposed, but by a sense of loyalty to the interests of our immediate contacts.
Date:
February 10, 2021
Creator:
Grigoropoulou, Nikolitsa
System:
The UNT Digital Library
Examining Scientific Literacy through New Media
Article evaluates the impact of new media on scientific literacy. Content analysis with a coding scheme was performed on 42 filtered websites and 20 microblogs to analyze the role of new media in disseminating scientific knowledge. The results showed that the quality of science-oriented websites was higher than that of microblogs. Suggestions about how to improve the quality of science-oriented new media and how to develop students’ scientific literacy through new media are also discussed.
Date:
July 10, 2019
Creator:
Gu, Xiaoqing; Wang, Chunli & Lin, Lin
System:
The UNT Digital Library
Composition-dependent apparent activation-energy and sluggish grain-growth in high entropy alloys
Article discusses experimental results which reveal that the apparent activation-energy for grain-growth in an fcc-based AlxCoCrFeNi high entropy alloy (HEA) system increases from 179 to 486 kJ/mol when the Al content increases from x = 0.1 to 0.3.
Date:
April 10, 2019
Creator:
Gwalani, Bharat; Salloom, Riyadh; Alam, Talukder; Valentin, S.G.; Zhou, X.; Thompson, G. et al.
System:
The UNT Digital Library
Dynamic Shear Deformation of a Precipitation Hardened Al0.7CoCrFeNi Eutectic High-Entropy Alloy Using Hat-Shaped Specimen Geometry
The article reports on the shear deformation of a eutectic structured HEA and effect of precipitation on shear deformation, particularly Al₀.₇CoCrFeNi high-entropy alloy (HEA). A split-Hopkinson pressure bar (SHPB) was used to compress the hat-shaped specimens to study the local dynamic shear response of the alloy. The change in the width of shear bands with respect to precipitation and deformation rates was studied. The precipitation of L1₂ phase did not delay the formation of adiabatic shear bands (ASB) or affect the ASB width significantly, however, the deformed region around ASB, consisting of high density of twins in fcc phase, was reduced from 80 µm to 20 µm in the stronger precipitation strengthened condition.
Date:
April 10, 2020
Creator:
Gwalani, Bharat; Wang, Tianhao; Jagetia, Abhinav; Gangireddy, Sindhura; Muskeri, Saideep; Mukherjee, Sundeep et al.
System:
The UNT Digital Library
Shedding New Light on Weak Emission-Line Quasars in the CIV-Hβ Parameter Space
Article describes how weak emission-line quasars (WLQs) are a subset of Type 1 quasars that exhibit extremely weak Lyα+N V λ1240 and/or C IV λ1549 emission lines. The authors investigate the relationship between emission-line properties and accretion rate for a sample of 230 `ordinary' Type 1 quasars and 18 WLQs at z<0.5 and 1.5<z<3.5 that have rest-frame ultraviolet and optical spectral measurements.
Date:
April 10, 2023
Creator:
Ha, Trung; Dix, Cooper; Matthews, Brandon M.; Shemmer, Ohad; Brotherton, Michael S.; Myers, Adam D. et al.
System:
The UNT Digital Library
Terahertz spectroscopy of MOFs reveals dynamic structure and contact free ultrafast photoconductivity
Article describes how metal-organic frameworks (MOFs) are porous crystalline materials, and their large pores make them particularly interesting for membranes, gas separation, and gas storage. The authors discuss how gas-MOF interactions alter the MOFs' spectral fingerprints.
Date:
January 10, 2024
Creator:
Hamilton, Kendra & Neu, Jens
System:
The UNT Digital Library
A smartphone-based online system for fall detection with alert notifications and contextual information of real-life falls
This article presents the results of a prospective study investigating a proof-of-concept, smartphone-based, online system for fall detection and notification. Apart from functioning as a practical fall monitoring instrument, this system may serve as a valuable research tool, enable future studies to scale their ability to capture fall-related data, and help researchers and clinicians to investigate real-falls.
Date:
August 10, 2021
Creator:
Harari, Yaar; Shawen, Nicholas; Mummidisetty, Chaithanya K.; Albert, Mark & Kording, Konrad P.
System:
The UNT Digital Library
Holographically Formed Three-Dimensional Penrose-Type Photonic Quasicrystal Through a Lab-Made Single Diffractive Optical Element
This describes the use of a holographic lithography method to fabricate large-area three-dimensional Penrose-type photonic quasicrystals.
Date:
September 10, 2010
Creator:
Harb, Ahmad; Torres, Faraon; Ohlinger, Kris; Lin, Yuankun; Lozano, Karen; Xu, Di et al.
System:
The UNT Digital Library
Geometry, groceries, and gardens: Learning mathematics and social justice through a nested, equity-directed instructional approach
Authors of the article addressed the call for explorations of how BIPOC students’ “experiences in secondary mathematics classrooms might advance transformative, equity-focused, pedagogical models” by exploring how a nested, equity-directed approach created different kinds of opportunities for students to take up, shift, or resist what it means to teach, learn, and do mathematics. Specifically, authors looked at efforts to engage equity-directed dominant and critical approaches through a series of three mathematics projects aimed at investigating food insecurity as a social (in)justice issue using geometry.
Date:
June 10, 2023
Creator:
Harper, Frances K. & Kudaisi, Queshonda J.
System:
The UNT Digital Library
Probing Noise in Flux Qubits via Macroscopic Resonant Tunneling
Article on the characterization of noise in a flux qubit using macroscopic resonant tunneling between the two lowest lying states of a bistable rf SQUID. Analysis of these results indicates that the dominant source of low energy flux noise in this device is a quantum mechanical environment in thermal equilibrium.
Date:
September 10, 2008
Creator:
Harris, R.; Johnson, M. W.; Han, S.; Berkley, A. J.; Johansson, J.; Bunyk, P. et al.
System:
The UNT Digital Library
Acetaldehyde oxidation at elevated pressure
A detailed chemical kinetic model for oxidation of CH3CHO at intermediate to high temperature and elevated pressure has been developed and evaluated by comparing predictions to novel high-pressure flow reactor experiments as well as shock tube ignition delay measurements and jet-stirred reactor data from literature. The flow reactor experiments were conducted with a slightly lean CH3CHO/O2 mixture highly diluted in N2 at 600–900 K and pressures of 25 and 100 bar. This is the accepted manuscript version of the published article.
Date:
April 10, 2021
Creator:
Hashemi, Hamid; Christensen, Jakob M.; Marshall, Paul & Glarborg, Peter
System:
The UNT Digital Library
Generation of over 1000 Diffraction Spots from 2D Graded Photonic Super-Crystals
Discusses a project in which researchers were able to generate over 1000 diffraction spots from a graded photonic super-crystal with a unit super-cell size of 12a × 12a where a is the lattice constant and hole radii are gradually changed in dual directions.
Date:
April 10, 2020
Creator:
Hassan, Safaa; Jiang, Yan; Alnasser, Khadijah; Hurley, Noah; Zhang, Hualiang; Philipose, Usha et al.
System:
The UNT Digital Library