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136 Matching Results
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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
Preferential intracellular pH regulation is a common trait amongst fishes exposed to high environmental CO2
Article testing the hypothesis that preferential pHi regulation is a widespread strategy of acid–base regulation among fish by measuring pHi regulation in 10 different fish species that are broadly phylogenetically separated, spanning six orders, eight families and 10 genera.
Date:
June 17, 2019
Creator:
Shartau, R. B.; Baker, D. W.; Harter, T. S.; Aboagye, D. L.; Allen, P. J.; Val, A. L. et al.
Object Type:
Article
System:
The UNT Digital Library
The Impact of Low Self-control on Past and Future Cyber Offending
Article presents a study examining the effects of self-control on a variety of self-reported cyber offenses as well as anticipated cyber offending behaviors.
Date:
April 6, 2020
Creator:
Nodeland, Brooke & Morris, Robert
Object Type:
Article
System:
The UNT Digital Library
Prescriptions for Correcting Ultraviolet-based Redshifts for Luminous Quasars at High Redshift
This article presents near-infrared spectroscopy of 18 luminous quasars at 2.15 < z < 3.70 that allows the authors to obtain reliable systemic redshifts for these sources.
Date:
April 8, 2020
Creator:
Dix, Cooper; Shemmer, Ohad; Brotherton, Michael S.; Green, Richard F.; Mason, Michelle & Myers, Adam D.
Object Type:
Article
System:
The UNT Digital Library
Fertility knowledge, contraceptive use and unintentional pregnancy in 29 African countries: a cross-sectional study
Article examines the association between incorrect knowledge of ovulation and unintentional pregnancy/child among young women in sub-Saharan Africa countries.
Date:
April 9, 2020
Creator:
Oppong, Joseph R.; Iyanda, Ayodeji Emmanuel; Dinkins, Barbara J.; Osayomi, Tolulope; Adeusi, Temitope Joshua & Lu, Yongmei
Object Type:
Article
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.
Object Type:
Article
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.
Object Type:
Article
System:
The UNT Digital Library
Underlying Ossification Phenotype in a Murine Model of Metastatic Synovial Sarcoma
This article presents the analysis of genetic mouse models of synovial sarcoma to determine the extent of ossification in the tumors and its relationship with morbidity. The authors noted higher ossification within their metastatic mouse model of synovial sarcoma. Their conclusion is that both metastasis and ossification are dependent on time, but that they are independent of one another.
Date:
April 10, 2020
Creator:
Kirkham, Matthew; Kalivas, Austen; Fatema, Kaniz; Luelling, Sarah; Dubansky, Brooke H.; Dubansky, Benjamin et al.
Object Type:
Article
System:
The UNT Digital Library
Excavating theory in teacher evaluation: Implementing evaluation frameworks as Wengerian boundary objects
This article explores the theory and practice between two existing conceptual frameworks: 1) social learning theory and 2) teacher evaluation systems.
Date:
April 13, 2020
Creator:
King, Kelley M. & Paufler, Noelle A.
Object Type:
Article
System:
The UNT Digital Library
Formula-Driven, Size-Tunable Synthesis of PMMA Nanoparticles by Varying Surfactant Concentration
Paper presents a streamlined, reproducible synthetic method for the production of size-tunable poly(methyl methacrylate) (PMMA) nanoparticles (PMMANPs) and amine-functionalized block-copolymer PMMANPs (H2N-PMMANPs) by varying subcritical concentrations of sodium dodecyl sulfate (SDS).
Date:
April 13, 2020
Creator:
Kamras, Bryan L.; Mirzanasiri, Nooshin; Korir, Daniel K.; Mandal, Sujata; Hariharakumar, Shreya L.; Petros, Robby A. et al.
Object Type:
Article
System:
The UNT Digital Library
The Relationships between Supply Chain Capability and Shareholder Value Using Financial Performance Indicators
Paper examines which financial performance indicators (FPIs) evaluate the level of supply chain capability (SCC) that explicitly touches all of the business functions and processes within and beyond the company.
Date:
April 13, 2020
Creator:
Hong, Seock-Jin & Najmi, Hossein
Object Type:
Article
System:
The UNT Digital Library
Existence of solutions for semilinear problems on exterior domains
Article proves the existence of an infinite number of radial solutions to ∆u+K(r)f(u) = 0 on ℝᶰ such that limᵣ →∞ u(r) = 0 with prescribed number of zeros on the exterior of the ball of radius R > 0 where f is odd with f < 0 on (0, β), f > 0 on (β, ∞) with f superlinear for large u, and K(r) ∼ r ⁻ᵅ with α > 2(N − 1).
Date:
April 15, 2020
Creator:
Iaia, Joseph A.
Object Type:
Article
System:
The UNT Digital Library
BAM: A Block-Based Bayesian Method for Detecting Genome-Wide Associations with Multiple Diseases
Article proposes a novel Bayesian method, named BAM, for simultaneously partitioning Single Nucleotide Polymorphisms (SNPs) into Linkage Disequilibrium(LD)-blocks and detecting genome-wide multi-locus epistatic interactions that are associated with multiple diseases. Experimental results on the simulated datasets demonstrate that BAM is powerful and efficient.
Date:
April 16, 2020
Creator:
Guo, Xuan; Wu, Guanying & Xu, Baohua
Object Type:
Article
System:
The UNT Digital Library
Modeling and Characterization of Scaling Factor of Flexible Spiral Coils for Wirelessly Powered Wearable Sensors
This article presents the design, modeling, and experimental characterization of flexible square-shaped spiral coils with different scaling factors for WPT systems. The effects of coil scaling factor on inductance, capacitance, resistance, and the quality factor (Q-factor) are modeled, simulated, and experimentally validated for the case of flexible planar coils. This article also presents the effect of skin contact with the flexible coil in terms of the power transfer efficiency (PTE) to validate the suitability as a wearable sensor.
Date:
April 17, 2020
Creator:
Biswas, Dipon K.; Sinclair, Melissa; Le, Tien; Pullano, Salvatore Andrea; Fiorillo, Antonino S. & Mahbub, Ifana
Object Type:
Article
System:
The UNT Digital Library
The Oxidation-Induced Autofluorescence Hypothesis: Red Edge Excitation and Implications for Metabolic Imaging
Research study explores how oxidation products of organic components (lipids, proteins, amino acids, etc.) can serve as the molecular source of red and near-infrared excited autofluorescence for biomedical diagnostics.
Date:
April 17, 2020
Creator:
Semenov, Alexey N.; Yakimov, Boris P.; Rubekina, Anna A.; Gorin, Dmitry A.; Drachev, Vladimir P.; Zarubin, Mikhail P. et al.
Object Type:
Article
System:
The UNT Digital Library
A New Multiteam System (MTS) Effectiveness Model
The article focuses on a systematic review of current team effectiveness frameworks and models. A narrative-based method for theorizing was utilized to develop a new MTS team effectiveness framework. This research contributes to the MTS literature by providing a new formula for team effectiveness at both the team level (team effectiveness formula) and the MTS level (MTS team effectiveness formula).
Date:
April 19, 2020
Creator:
Turner, John R.; Baker, Rose M.; Ali, Zain & Thurlow, Nigel
Object Type:
Article
System:
The UNT Digital Library
A Signature Assignment Puts Vegetables on the Line
This is an unpublished manuscript that delves into the use of Signature Assignments (SAs) which are real-world applications that embed curriculum learning objectives in routine classwork and facilitate assessment of outcomes across classes and disciplines. SAs tied to key learning objectives demonstrate student growth and reveal areas where instructional improvement might be needed. Additionally, SAs tied to curriculum objectives contribute to program and university understanding of teaching strategies that promote student success.
Date:
April 19, 2020
Creator:
Connors, Priscilla L.
Object Type:
Text
System:
The UNT Digital Library
Triplet photosensitizer-nanotube conjugates: synthesis, characterization and photochemistry of charge stabilizing, palladium porphyrin/carbon nanotube conjugates
Author Manuscript version of an article investigating the ability of a triplet photosensitizer to generate long-lived charge separated states, in contrast to traditionally used singlet photosensitizers, in covalently functionalized single-walled carbon nanotube hybrids.
Date:
April 21, 2020
Creator:
Arellano, Luis M.; Gobeze, Habtom B.; Gómez-Escalonilla, María J.; Fierro, Jose Luis G.; D'Souza, Francis & Langa, Fernando
Object Type:
Article
System:
The UNT Digital Library
Organizational Practices: A Digital Repository's Perspective
This presentation examines collection organization and preservation from the perspective of The Portal to Texas History, a digital repository for cultural heritage and historic materials from across the state of Texas. It focuses on how knowing one’s organizational scope, mission, and collection goals can help shape their materials management.
Date:
April 22, 2020
Creator:
Mangum, Jake & McIntosh, Marcia
Object Type:
Presentation
System:
The UNT Digital Library
Topological View of Flows Inside the BOLD Spontaneous Activity of the Human Brain
Article describes study which found that persistent, recurring blood oxygen level dependent (BOLD) signals in triangulated rs-fMRI videoframes display previously undetected topological findings, i.e., vortex structures that cover brain activated regions.
Date:
April 22, 2020
Creator:
Don, Arjuna P. H.; Peters, James F.; Ramanna, Sheela & Tozzi, Arturo
Object Type:
Article
System:
The UNT Digital Library
Psychosocial Mechanism of Adolescents’ Depression: A Dose-Response Relation with Physical Activity
The article highlights a study aimed (1) to examine the relations between different doses of physical activity (PA), light PA (LPA), moderate PA (MPA), and vigorous PA (VPA), academic self-efficacy, and depression among adolescents, and (2) to investigate the direct and indirect relations of various doses of PA to depression through academic self-efficacy among middle school adolescents. Findings of this study indicated that academic self-efficacy regulates adolescents’ depression. Tailoring different intensities of PA benefits adolescents’ academic self-efficacy by framing the positive and supportive environment in schools, which can potentially reduce the prevalence of depression during adolescence.
Date:
April 24, 2020
Creator:
Xiang, Man; Gu, Xiangli; Zhang, Xiaoxia; Moss, Samantha; Huang, Chaoqun; Nelson, Larry Paul et al.
Object Type:
Article
System:
The UNT Digital Library
Socialization on Sustainable Networks: The Case of eBay Green's Facebook
Article explores consumer socialization of sustainable networks based on the theory of consumer socialization, using eBay Green's Facebook presence as a case study.
Date:
April 24, 2020
Creator:
Kim, Haejung; Oh, Kyung Wha & Jung, Hye Jung
Object Type:
Article
System:
The UNT Digital Library
Association of Home Food Availability with Prediabetes and Diabetes among Adults in the United States
This article examined associations of home food availabilities with prediabetes and diabetes among 8929 adults (20–70 years) participating in 2007–2010 National Health and Nutrition Examination Surveys. The results show prediabetes participants had lower availability of healthy foods and higher availability of unhealthy foods, suggesting the need to improve healthy food availability at home for this population.
Date:
April 25, 2020
Creator:
McAtee, Jenniffer; Tao, Meng-Hua; King, Christian & Chai, Weiwen
Object Type:
Article
System:
The UNT Digital Library
High-Throughput Computational Search for Half-Metallic Oxides
The article describes a high-throughput computational search for half-metallic compounds. The analysis of calculated electronic properties of thousands of materials from the inorganic crystal structure database allowed the authors to identify potential half metals. They found over two-hundred strong half-metallic oxides; several of them have never been reported before.
Date:
April 25, 2020
Creator:
Liyanage, Laalitha S. I.; Slawińska, Jagoda; Gopal, Priya; Curtarolo, Stefano; Fornari, Marco & Buongiorno Nardelli, Marco
Object Type:
Article
System:
The UNT Digital Library