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1,555 Matching Results
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Re-examination of the N2O+O reaction
This article is about how the reaction of N20 with O is a key step in consumption of nitrous oxide in thermal processes. In the present work ,the authors re-examined a wide range of experiments relevant for the N2O+O reaction through kinetic modeling, paying attention to the impact of artifacts such as impurities and surface reactions.
Date:
July 27, 2023
Creator:
Glarborg, Peter; Allingham, Johanne S.; Skov, Alexander B.; Hashemi, Hamid & Marshall, Paul
Object Type:
Article
System:
The UNT Digital Library
Creating The Nimitz Timeline
This presentation is about the creation of the Nimitz Family Photographs Collection. It was presented at the UNT Libraries' 2024 Student Snapshots Symposium held in Denton, Texas.
Date:
April 10, 2024
Creator:
Skinner, Tyler
Object Type:
Presentation
System:
The UNT Digital Library
Reactions of hydrazine with the amidogen radical and atomic hydrogen
Article describes how the rate coefficient k1 for NH2 + N2H4 was measured to be (5.4 ± 0.4) × 10−14 cm3 molecule−1 s−1 at 296 K. The authors then describe how a combination of experiment and theory leads to a recommended rate coefficient for hydrogen abstraction of k1 = 6.3 × 10−23 T3.44 exp(+289 K/T) cm3 molecule−1 s−1.
Date:
June 7, 2023
Creator:
Gao, Yide; Alecu, I. M.; Hashemi, Hamid; Glarborg, Peter & Marshall, Paul
Object Type:
Article
System:
The UNT Digital Library
Probing High-Temperature Amine Chemistry: Is the Reaction NH3 + NH2 ⇄ N2H3 + H2 Important?
Article describes how the reaction NH3 + NH2 ⇄ N2H3 + H2 (R1) has been identified as a key step to explain experimental results for pyrolysis and oxidation of ammonia. In the present work, the reaction was studied by ab initio theory and by reinterpretation of experimental data.
Date:
March 14, 2023
Creator:
Marshall, Paul & Glarborg, Peter
Object Type:
Article
System:
The UNT Digital Library
Measurement of the Intramolecular Hydrogen-Shift Rate Coefficient for the CH3SCH2OO Radical Between 314 and 433 K
Article describes how the intramolecular hydrogen-shift rate coefficient of the CH3SCH2O2 (methylthiomethylperoxy, MSP) radical, a product formed in the oxidation of dimethyl sulfide (DMS), was measured using a pulsed laser photolysis flow tube reactor coupled to a high-resolution time-of-flight chemical ionization mass spectrometer that measured the formation of the DMS degradation end product HOOCH2SCHO. Measurements performed over the temperature range of 314–433 K yielded a hydrogen-shift rate coefficient of k1(T) = (2.39 ± 0.7) × 109 exp(−(7278 ± 99)/T) s–1 Arrhenius expression and a value extrapolated to 298 K of 0.06 s–1.
Date:
March 2, 2023
Creator:
Assaf, Emmanuel; Finewax, Zachary; Marshall, Paul; Veres, Patrick R.; Neuman, Andrew & Burkholder, James B. (James Bart), 1954-
Object Type:
Article
System:
The UNT Digital Library
Re-evaluation of rate constants for the reaction N2H4 (+ M) ⇄ NH2 + NH2 (+ M)
Article describes how rate constants for the dissociation/recombination reaction N2H4 (+ M) ⇄ NH2 + NH2 (+ M) are determined by a combination of quantum-chemical calculations and statistical unimolecular rate theory. Implications of the present re-evaluated rate constants for the modeling of high temperature ammonia oxidation kinetics are discussed, showing an only small influence of their precise values on the overall properties of the process.
Date:
October 4, 2023
Creator:
Cobos, Carlos J.; Glarborg, Peter; Marshall, Paul & Troe, Jürgen
Object Type:
Article
System:
The UNT Digital Library
A Student's Role in Collection Development
This poster is about a student's role in collection development. It was presented at the UNT Libraries' 2024 Student Snapshots Symposium held in Denton, Texas.
Date:
April 10, 2024
Creator:
Joseph, Mayakah
Object Type:
Poster
System:
The UNT Digital Library
How A Library Student Can Get A Job?
This poster describes how a library student may be able to get a job. It was presented at the UNT Libraries' 2024 Student Snapshots Symposium held in Denton, Texas.
Date:
April 10, 2024
Creator:
Dubey, Lakshmi
Object Type:
Poster
System:
The UNT Digital Library
Administrative Workflow
This presentation is about the administrative workflow of library administrative student assistants. It was presented at the UNT Libraries' 2024 Student Snapshots Symposium held in Denton, Texas.
Date:
April 10, 2024
Creator:
Kamarapu, Manumitha & Sivaprakasam, Renugopal
Object Type:
Presentation
System:
The UNT Digital Library
Day in the life of a Metadata Student: The Chronicles of Oklahoma
Presentation is about the day in the life of a metadata student working on the Chronicles of Oklahoma collection. It was presented at the UNT Libraries' 2024 Student Snapshots Symposium held in Denton, Texas.
Date:
April 10, 2024
Creator:
Bussey, Jennifer
Object Type:
Presentation
System:
The UNT Digital Library
Navigating the Digital Seas: Streamlining the Research Process in the Information Age
This is a video presentation about the research process for the Chester W. Nimitz Personal Letters collection. It was presented at the UNT Libraries' 2024 Student Snapshots Symposium held in Denton, Texas.
Date:
April 10, 2024
Creator:
Lord, Jacob
Object Type:
Presentation
System:
The UNT Digital Library
Experimental and Modeling Study of Water Time Histories during H2S-N2O Combustion in a Shock Tube
Article describes how, in the present study, the water formation was followed by laser absorption with N2O as an oxidant, instead of O2. Three H2S/N2O mixtures diluted in 98% Ar were studied to cover the following range of equivalence ratios: 0.5, 1.0, and 2.0, over a wide range of temperatures (1580–1940 K) around atmospheric pressure.
Date:
June 7, 2023
Creator:
Cooper, Sean P.; Marshall, Paul; Mathieu, Olivier; Pinzón, Laura T.; Mulvihill, Clayton R. & Glarborg, Peter
Object Type:
Article
System:
The UNT Digital Library
Supporting Student Parents in Willis Library
This is a poster about how to support student parents using the resources at Willis Library. It was presented at the UNT Libraries' 2024 Student Snapshots Symposium held in Denton, Texas.
Date:
April 10, 2024
Creator:
Ramos, Emma
Object Type:
Poster
System:
The UNT Digital Library
What I Have learned In My Year of Feedback
This presentation is about the experience gained while working as a student feedback assistant. It was presented at the UNT Libraries' 2024 Student Snapshots Symposium held in Denton, Texas.
Date:
April 10, 2024
Creator:
Esparza, Daniel
Object Type:
Presentation
System:
The UNT Digital Library
The Digital Archive Process in Relation to the Creation of Medieval Manuscripts
This is a presentation about how the digital archive process is related to the creation of medieval manuscripts. It was presented at the UNT Libraries' 2024 Student Snapshots Symposium held in Denton, Texas.
Date:
April 10, 2024
Creator:
Resetar, Connor
Object Type:
Presentation
System:
The UNT Digital Library
Computational study of the gas-phase reactions of sulfuric acid with OH(ΠJ), O(3PJ), Cl(2P) and O(1D2) radicals
This article is about how rate coefficients for reactions of H2SO4 with OH, O(3P) and Cl radicals over 160–298 K were estimated computationally. The authors propose kOH = 8.5 × 10-14 exp(-50 K/T), kO = 1.1 × 10-12 exp(-5012 K/T) and kCl = 3.1 × 10-9 exp(-3314 K/T) cm3 molecule-1 s−1.
Date:
December 27, 2021
Creator:
Marshall, Paul & Burkholder, James B. (James Bart), 1954-
Object Type:
Article
System:
The UNT Digital Library
Organizing a Successful Workload Analysis Project
Presentation sharing the process for developing and executing a workload analysis project at the University of North Texas Libraries for the Cataloging and Metadata Services department. It was presented at the Creative Solutions in Cataloging, Acquisitions, and Resources Management Conference held by Amigos Library Services on February 15, 2024.
Date:
February 15, 2024
Creator:
Yanowski, Kevin; Sassen, Catherine & Brannon, Sian
Object Type:
Presentation
System:
The UNT Digital Library
GSA Scholarly Works Workflow
This is a poster about the scholarly works workflow for a graduate student assistant. It was presented at the UNT Libraries' 2024 Student Snapshots Symposium held in Denton, Texas.
Date:
April 10, 2024
Creator:
Warrenfells, Ardis
Object Type:
Poster
System:
The UNT Digital Library
Self-Love Tabling: A GSA Outreach Event
This poster is about a tabling event about self-love as an outreach event. It was presented at the UNT Libraries' 2024 Student Snapshots Symposium held in Denton, Texas.
Date:
April 10, 2024
Creator:
Londa, Ashra & Cummins, Valerie
Object Type:
Poster
System:
The UNT Digital Library
UNT Music Library Social Media and Me
This is a presentation about the Music Library A-Z Social Media Campaign. It was presented at the UNT Libraries' 2024 Student Snapshots Symposium held in Denton, Texas.
Date:
April 10, 2024
Creator:
Walther, Becca
Object Type:
Presentation
System:
The UNT Digital Library
The Perspective Of Trust As An Imaging Assistant
This is an illustrated video presentation about the aspect of trust from the perspective of an imaging assistant. It was presented at the UNT Libraries' 2024 Student Snapshots Symposium held in Denton, Texas.
Date:
April 10, 2024
Creator:
Fohl, Aster & Guerrero, Brianna
Object Type:
Presentation
System:
The UNT Digital Library
An experimental and modeling study on auto-ignition kinetics of ammonia/methanol mixtures at intermediate temperature and high pressure
Article describes how a rapid compression machine has been applied to measure the ignition delay times of NH3/CH3OH mixtures covering pressures of 20 and 40 bar, equivalence ratios of 0.5, 1.0 and 2.0, and temperatures between 845 and 1100 K. Analysis of the pressure profiles shows three distinct ignition modes for NH3/CH3OH mixtures, facilitated by the pre-ignition heat release from NH3 consumption. A detailed mechanism for ignition of NH3/CH3OH fuel blends has been developed, capable of reproducing the ignition behavior of mixtures with reasonable accuracy.
Date:
April 29, 2022
Creator:
Li, Mengdi; He, Xiaoyu; Hashemi, Hamid; Glarborg, Peter; Lowe, Vincent M.; Marshall, Paul et al.
Object Type:
Article
System:
The UNT Digital Library
Digitizing Texas History
This poster describes the process of digitizing Texas history. It was presented at the UNT Libraries' 2024 Student Snapshots Symposium held in Denton, Texas.
Date:
April 10, 2024
Creator:
Guerrero, Brianna
Object Type:
Presentation
System:
The UNT Digital Library
Comment on ‘Extremely rapid self-reactions of hydrochlorofluoromethanes and hydrochlorofluoroethanes and implications in destruction of ozone’
Article comments on the claims made by the authors of the original article. The authors of the commentary note flaws in the DFT-based methodology and the commentators describe differences between their application and the original article's described application.
Date:
May 26, 2022
Creator:
Marshall, Paul & Burkholder, James B. (James Bart), 1954-
Object Type:
Article
System:
The UNT Digital Library