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Articles 1471 - 1500 of 27884
Full-Text Articles in Physical Sciences and Mathematics
Charge Transport In Dielectric: The Pulsed Electroacoustic Method, Zachary Gibson
Charge Transport In Dielectric: The Pulsed Electroacoustic Method, Zachary Gibson
Physics Student Research
Understanding and predicting charge accumulation and transport in dielectric materials is vital in applications where excess charge can accumulate including semiconductor devices, high-power electronic devices, high voltage DC cabling, high-energy physics facilities, plasma chambers, and spacecraft charging. Excess charge accumulation may result in electrostatic discharge events, which are the leading cause of spacecraft failure due to the space environment. The pulsed electroacoustic method allows you to “pop the hood” and non-destructively directly measure the embedded charge distributions in dielectric materials. Charge transport in disordered dielectric materials, measurements with the pulsed electroacoustic system, and comparison to models will be presented.
Me3al-Mediated Domino Nucleophilic Addition/Intramolecular Cyclisation Of 2-(2-Oxo-2-Phenylethyl)Benzonitriles With Amines; A Convenient Approach For The Synthesis Of Substituted 1-Aminoisoquinolines, Krishna M. S. Adusumalli, Lakshmi N.S. Konidena, Hima B. Gandham, Krishnaiah Kumari, Krishan R. Valluru, Satya K.R. Nidasanametla, Venkateswara R. Battula, Hari K. Namballa
Me3al-Mediated Domino Nucleophilic Addition/Intramolecular Cyclisation Of 2-(2-Oxo-2-Phenylethyl)Benzonitriles With Amines; A Convenient Approach For The Synthesis Of Substituted 1-Aminoisoquinolines, Krishna M. S. Adusumalli, Lakshmi N.S. Konidena, Hima B. Gandham, Krishnaiah Kumari, Krishan R. Valluru, Satya K.R. Nidasanametla, Venkateswara R. Battula, Hari K. Namballa
Publications and Research
A simple and efficient protocol for the construction of 1-aminoisoquinolines was achieved by treating 2-(2-oxo-2- phenylethyl)benzonitriles with amines in the presence of Me 3 Al. The reaction proceeds via a domino nucleophilic addition with subsequent intramolecular cyclisation. This method provides a wide variety of substituted 1-aminoisoquinolines with good func- tional group tolerance. Furthermore, the synthetic utility of this protocol was demonstrated in the successful synthesis of the anti- tumor agent CWJ-a-5 in gram scale.
Silver Bow Creek/Butte Area Npl Site 2022 Draft Butte Priority Soils Operable Unit Interim Site-Wide Groundwater Monitoring Quality Assurance Project Plan (Qapp), 11/16/21, Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
2022 Draft Butte Priority Soils Operable Unit Interim Site-Wide Surface Water Monitoring Quality Assurance Project Plan (Qapp), Trec Inc., A Woodard And Curran Company
2022 Draft Butte Priority Soils Operable Unit Interim Site-Wide Surface Water Monitoring Quality Assurance Project Plan (Qapp), Trec Inc., A Woodard And Curran Company
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
2022 Final Butte Priority Soils Operable Unit Interim Site-Wide Surface Water Monitoring Quality Assurance Project Plan, Trec Inc., A Woodard And Curran Company
2022 Final Butte Priority Soils Operable Unit Interim Site-Wide Surface Water Monitoring Quality Assurance Project Plan, Trec Inc., A Woodard And Curran Company
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Sbc/Butte Area Npl Site Final Bpsou Interim Site-Wide Surface Water Monitoring Qapp 2020 And 2021 Monitoring Period, 10/14/20, Nikia Greene
Sbc/Butte Area Npl Site Final Bpsou Interim Site-Wide Surface Water Monitoring Qapp 2020 And 2021 Monitoring Period, 10/14/20, Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Silver Bow Creek Butte Area Npl Site 2022 Draft Butte Priority Soils Operable Unit Interim Site-Wide Surface Water Monitoring Quality Assurance Project Plan. Consent Decree- Civil Action No. Cv 89-039-Bu-She, Josh Bryson
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Epa Region 8 Qa Document Review Crosswalk, Nikia Greene
Epa Region 8 Qa Document Review Crosswalk, Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Provenance: An Intermediary-Free Solution For Digital Content Verification, Bilal Yousuf, M. Atif Qureshi, Brendan Spillane, Gary Munnelly, Oisin Carroll, Matthew Runswick, Kirsty Park, Eileen Culloty, Owen Conlan, Jane Suiter
Provenance: An Intermediary-Free Solution For Digital Content Verification, Bilal Yousuf, M. Atif Qureshi, Brendan Spillane, Gary Munnelly, Oisin Carroll, Matthew Runswick, Kirsty Park, Eileen Culloty, Owen Conlan, Jane Suiter
Articles
The threat posed by misinformation and disinformation is one of the defining challenges of the 21st century. Provenance is designed to help combat this threat by warning users when the content they are looking at may be misinformation or disinformation. It is also designed to improve media literacy among its users and ultimately reduce susceptibility to the threat among vulnerable groups within society. The Provenance browser plugin checks the content that users see on the Internet and social media and provides warnings in their browser or social media feed. Unlike similar plugins, which require human experts to provide evaluations and …
Automated Classification Model With Otsu And Cnn Method For Premature Ventricular Contraction Detection, Liang-Hung Wang, Lin-Juan Ding, Chao-Xin Xie, Su-Ya Jiang, I-Chun Kuo, Xin-Kang Wang, Jie Gao, Pao-Cheng Huang, Patricia Angela R. Abu
Automated Classification Model With Otsu And Cnn Method For Premature Ventricular Contraction Detection, Liang-Hung Wang, Lin-Juan Ding, Chao-Xin Xie, Su-Ya Jiang, I-Chun Kuo, Xin-Kang Wang, Jie Gao, Pao-Cheng Huang, Patricia Angela R. Abu
Department of Information Systems & Computer Science Faculty Publications
Premature ventricular contraction (PVC) is one of the most common arrhythmias which can cause palpitation, cardiac arrest, and other symptoms affecting the work and rest activities of a patient. However, patients hardly decipher their own feelings to determine the severity of the disease thus, requiring a professional medical diagnosis. This study proposes a novel method based on image processing and convolutional neural network (CNN) to extract electrocardiography (ECG) curves from scanned ECG images derived from clinical ECG reports, and segment and classify heartbeats in the absence of a digital ECG data. The ECG curve is extracted using a comprehensive algorithm …
Silver Bow Creek/Butte Area Npl Site, Trec Inc., A Woodard And Curran Company
Silver Bow Creek/Butte Area Npl Site, Trec Inc., A Woodard And Curran Company
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Advances In Rhizobial Research – Progress Priorities In Temperate Areas, Angela Sessitsch
Advances In Rhizobial Research – Progress Priorities In Temperate Areas, Angela Sessitsch
IGC Proceedings (1993-2023)
Rhizobia are well known for their capacity to establish a symbiosis with legumes. During this symbiosis the bacteria inhabit root nodules where they reduce atmospheric nitrogen and make it available to the plant. Biological nitrogen fixation (BNF) is an important source of nitrogen and the various legume crops and pasture species often fix as much as 200-300 kg nitrogen per hectare (Peoples et al., 1995). Globally, symbiotic nitrogen fixation has been estimated to amount to at least 70 million metric tons of nitrogen per year (Brockwell et al., 1995). Furthermore, in many cases nitrogen fertilizers are not efficiently used by …
The Legume – Rhizobia Symbiosis. Does It Vary For The Tropics Relative To The Mediterranean Basin?, J. G. Howieson, A. Mcinnes
The Legume – Rhizobia Symbiosis. Does It Vary For The Tropics Relative To The Mediterranean Basin?, J. G. Howieson, A. Mcinnes
IGC Proceedings (1993-2023)
Symbiotic N fixation from legumes is one of the most important biological processes on the planet. It currently provides the majority of the N requirement in agriculture, yet will have to double if cereal crop production is to meet world demand by 2020 (Kennedy and Cocking 1997). To effectively harness the value of biological N fixation from legumes we need to more fully understand G2 x E; where G refers to the genotypes of both the legume (Gl) and its microsymbiont (rhizobia; Gr), and E refers to the edaphic environment in which the symbiosis is …
Advances In Forage Legumes: Shrub Legumes, M. H. Shelton
Advances In Forage Legumes: Shrub Legumes, M. H. Shelton
IGC Proceedings (1993-2023)
Forage tree legumes benefit agriculture through their multi-purpose contributions to livestock feeding, to productivity of farming systems, and to protection of the environment.
Of the several hundred forage tree legume species regarded as having potential for forage only c. twenty are in common use. These are listed together with their agroecological range and tolerance of adverse environments including acid soils, cool temperatures, low rainfall, poor drainage and high salinity. The value of many species to ruminants is limited due to low nutritive value arising from low protein availability and low acceptability caused principally by high condensed tannin content. Only 10 …
Alfalfa, J. H. Bouton
Alfalfa, J. H. Bouton
IGC Proceedings (1993-2023)
Cultivated alfalfa or lucerne (Medicago sativa spp. sativa) is the most important forage legume in the world with approximately 32 million hectares cultivated mainly in the temperate regions of both the northern and southern hemispheres. Intensive research has been conducted on the management and physiology of the crop and a major seed industry has developed world wide. Since insect and disease pests are numerous in alfalfa, development of cultivars with the proper fall dormancy and a broad genetic base for pest resistance has been pursued in order to provide increased adaptation, persistence, and yield. There has been a …
Carbon And Nitrogen Isotopic Discrimination In Alfalfa For High Yield And Quality Forage, W. S. Oliveira, P. P. A. Oliveira, M. Corsi, S. M. Tsai
Carbon And Nitrogen Isotopic Discrimination In Alfalfa For High Yield And Quality Forage, W. S. Oliveira, P. P. A. Oliveira, M. Corsi, S. M. Tsai
IGC Proceedings (1993-2023)
Biological nitrogen fixation and assimilation of CO2 can be indirectly monitored in alfalfa (Medicago sativa L.) through the variation of the stable N and C isotopes in the plant (Δ values). Such measurements result in a simple, non-destructive and reliable method for identification of alfalfa cultivars of high yield and nutritional quality. A program for selection of 12 alfalfa cultivars under field and controlled conditions (lysimeters) included determination of biomass and N accumulation. Under controlled conditions yields ranged from 1.77 to 2.47 ton/ha/month (Pioneer 5312 and WL-605) and N2-fixed varied from 77.43 to 84.01% for total N (Brazilian …
A Complete Characterisation Of Vertex-Multiplications Of Trees With Diameter 5, Willie Han Wah Wong, Eng Guan Tay
A Complete Characterisation Of Vertex-Multiplications Of Trees With Diameter 5, Willie Han Wah Wong, Eng Guan Tay
Theory and Applications of Graphs
For a connected graph G, let D(G) be the family of strong orientations of G; and for any D ∈ D(G), we denote by d(D) the diameter of D. The orientation number of G is defined as d(G)=min{d(D) | D ∈ D(G)}. In 2000, Koh and Tay introduced a new family of graphs, G vertex-multiplications, and extended the results on the orientation number of complete n-partite graphs. Suppose G has the vertex set V(G)={v1,v2,… vn}. For any sequence of n positive integers (s …
Analysis Of Ritalin Addiction And Recovery From Both A Physical And Psychological Lens, Nicole Madrigal, Tyler Marshall
Analysis Of Ritalin Addiction And Recovery From Both A Physical And Psychological Lens, Nicole Madrigal, Tyler Marshall
Fall Showcase for Research and Creative Inquiry
We will investigate the physical impacts, both short and long-term effects, of substance use. In doing so, we will frame an argument for the substance's addictive properties as it relates to both its physically addictive and sociological addictive properties. In doing so, a stronger understanding of how an individual can move through the stages of substance use, to abuse, and finally addiction will be reviewed. We will then address current treatment strategies for the substance and how they address or fail to address both the physical and sociological impacts of its use.
The Profound Photophysical Effects Of Organic Chromophore Connectivity And Coupling, David J. Walwark Jr
The Profound Photophysical Effects Of Organic Chromophore Connectivity And Coupling, David J. Walwark Jr
Nanoscience and Microsystems ETDs
Through-bond and through-space interactions between chromophores are shown to have wide-ranging effects on photophysical outcomes upon light absorption in organic molecules. In collapsed poly(3-hexylthiophene), through-space coupling creates hybrid chromophores that act as energy sinks for nearby excitons and favorable sites for molecular oxygen to dock. Upon excitation with visible light the highly-coupled chromophores react with the docked oxygen and subsequently do not quench nearby excitons as efficiently. In tetramer arrays of perylene diimide chromophores the central moiety through-bond connectivity is synthesized in two variants which exhibit vastly different single-molecule blinking behavior and theoretically-predicted electronic transition character. In the more-connected tetramer …
A Practical Solution: The Anthropocene Is A Geological Event, Not A Formal Epoch, Philip L. Gibbard, Andrew M. Bauer, Matthew Edgeworth, William F. Ruddiman, Jacquelyn L. Gill, Dorothy J. Merritts, Stanley C. Finney, Lucy E. Edwards, Michael J. C. Walker, Mark Maslin, Erle C. Ellis
A Practical Solution: The Anthropocene Is A Geological Event, Not A Formal Epoch, Philip L. Gibbard, Andrew M. Bauer, Matthew Edgeworth, William F. Ruddiman, Jacquelyn L. Gill, Dorothy J. Merritts, Stanley C. Finney, Lucy E. Edwards, Michael J. C. Walker, Mark Maslin, Erle C. Ellis
Biology and Ecology Faculty Scholarship
The Anthropocene has yet to be defined in a way that is functional both to the international geological community and to the broader fields of environmental and social sciences. Formally defining the Anthropocene as a chronostratigraphical series and geochronological epoch with a precise global start date would drastically reduce the Anthropocene’s utility across disciplines. Instead, we propose the Anthropocene be defined as a geological event, thereby facilitating a robust geological definition linked with a scholarly framework more useful to and congruent with the many disciplines engaging with human-environment interactions. Unlike formal epochal definitions, geological events can recognize the spatial and …
A 6-Cpg Validated Methylation Risk Score Model For Metabolic Syndrome: The Hypergen And Goldn Studies, Bertha A. Hidalgo, Bre Minniefield, Amit Patki, Rikki Tanner, Minoo Bagheri, Hemant K. Tiwari, Donna K. Arnett, Marguerite Ryan Irvin
A 6-Cpg Validated Methylation Risk Score Model For Metabolic Syndrome: The Hypergen And Goldn Studies, Bertha A. Hidalgo, Bre Minniefield, Amit Patki, Rikki Tanner, Minoo Bagheri, Hemant K. Tiwari, Donna K. Arnett, Marguerite Ryan Irvin
Epidemiology and Environmental Health Faculty Publications
There has been great interest in genetic risk prediction using risk scores in recent years, however, the utility of scores developed in European populations and later applied to non-European populations has not been successful. The goal of this study was to create a methylation risk score (MRS) for metabolic syndrome (MetS), demonstrating the utility of MRS across race groups using cross-sectional data from the Hypertension Genetic Epidemiology Network (HyperGEN, N = 614 African Americans (AA)) and the Genetics of Lipid Lowering Drugs and Diet Network (GOLDN, N = 995 European Americans (EA)). To demonstrate this, we first selected cytosine-guanine dinucleotides …
Analysis Of Fluoxetine (Prozac) Addiction And Recovery From Both A Physical And Psychological Lens, Kristen Dobek, Hannah Couch
Analysis Of Fluoxetine (Prozac) Addiction And Recovery From Both A Physical And Psychological Lens, Kristen Dobek, Hannah Couch
Fall Showcase for Research and Creative Inquiry
We will investigate the physical impacts both short and long term effects of of substance use. In doing so we will frame an argument for the substance's addictive properties as it relates to both its physically addictive and sociological addictive properties. In doing, so a stronger understanding of how an individual can move through the stages of substance use, to abuse, and finally addiction will be reviewed. We will then address current treatment strategies for the substance and how they address or fail to address both the physical and sociological impacts of its use.
Non-Local Approximation Properties, Kira Pierce
Non-Local Approximation Properties, Kira Pierce
Fall Showcase for Research and Creative Inquiry
This project concerns the approximation properties of a given set where X is a scattered sequence and Ï•(x) = 1/x* ln(1 + x^2 ). Similar approximation sets are commonly used in interpolation problems and are especially helpful due to their Fourier representation. For our work, we will work to prove the following theorem.
Geographic Distribution And History Of Plant Specimens At Longwood University Harvill-Stevens Herbarium, Ross Bechtle
Geographic Distribution And History Of Plant Specimens At Longwood University Harvill-Stevens Herbarium, Ross Bechtle
Fall Showcase for Research and Creative Inquiry
Herbaria are plant museums comprising collections of dried mounted plant specimens crucial for education, research, and conservation purposes. They provide a permanent record of plant diversity found in a particular area over time. An understanding of geographic coverage and history of collection of specimens in a herbarium is important for future planning and growth of a herbarium. The purpose of this study was to understand the county-level distribution and chronology of collection of plant specimens housed in Harvill-Stevens Herbarium at Longwood. Harvill-Stevens Herbarium is the largest collection of Virginia native plants the second largest herbarium in the state consisting of …
Peruvian Fur Seals As Archivists Of El Niño Southern Oscillation Effects, Mickie Rae Edwards, Susana Cardenas-Alayza, Michael Adkesson, Mya Daniels-Abdulahad, Amy Hirons
Peruvian Fur Seals As Archivists Of El Niño Southern Oscillation Effects, Mickie Rae Edwards, Susana Cardenas-Alayza, Michael Adkesson, Mya Daniels-Abdulahad, Amy Hirons
Marine & Environmental Sciences Faculty Articles
Peru’s coastal waters are characterized by significant environmental fluctuation due to periodic El Niño- La Niña- Southern Oscillation (ENSO) events. This variability results in ecosystem-wide food web changes which are reflected in the tissues of the Peruvian fur seal (Arctocephalus australis). Stable isotope ratios (δ13C and δ15N) in Peruvian fur seal vibrissae (whiskers) are used to infer temporal primary production and dietary variations in individuals. Sea surface temperature anomaly (SSTA) recordings from the Niño 1+2 Index region captured corresponding ENSO conditions. Fluctuations in δ15N values were correlated to SSTA records, indicating that …
Mgrre_Pureoilscouttickets_Kyncl, Jos & Marie_1_21127118890000, Mgrre
Mgrre_Pureoilscouttickets_Kyncl, Jos & Marie_1_21127118890000, Mgrre
Legacy Scout Tickets from Pure Oil Company
No abstract provided.
Cognizant Composites: Seamless Integration Of Circuitry And Sensors Into Structural Composites, Reuben Fresquez
Cognizant Composites: Seamless Integration Of Circuitry And Sensors Into Structural Composites, Reuben Fresquez
Computer Science ETDs
This thesis describes a set of novel techniques for embedding sensors, circuitry, and electronics into structural composites. I leverage recent developments in human computer interaction to create sensors and circuitry that are seamlessly incorporated into structural composites. I fabricate bend and compression sensors, along with circuitry, from textiles, which enables me to add electronic capabilities without impacting the composite’s structural integrity. I describe the construction of these “cognizant composites” and demonstrate their functionality. I also explore techniques for embedding standard electronic components, including microcontrollers, into structural composites. Potential applications of this technology include buildings that can warn occupants if load-bearing …
Reducing Kidney Discard With Artificial Intelligence Decision Support: The Need For A Transdisciplinary Systems Approach, Richard Threlkeld, Lirim Ashiku, Casey I. Canfield, Daniel Burton Shank, Mark A. Schnitzler, Krista L. Lentine, David A. Axelrod, Anil Choudary Reddy Battineni, Henry Randall, Cihan H. Dagli
Reducing Kidney Discard With Artificial Intelligence Decision Support: The Need For A Transdisciplinary Systems Approach, Richard Threlkeld, Lirim Ashiku, Casey I. Canfield, Daniel Burton Shank, Mark A. Schnitzler, Krista L. Lentine, David A. Axelrod, Anil Choudary Reddy Battineni, Henry Randall, Cihan H. Dagli
Engineering Management and Systems Engineering Faculty Research & Creative Works
Purpose of Review: A transdisciplinary systems approach to the design of an artificial intelligence (AI) decision support system can more effectively address the limitations of AI systems. By incorporating stakeholder input early in the process, the final product is more likely to improve decision-making and effectively reduce kidney discard.
Recent Findings: Kidney discard is a complex problem that will require increased coordination between transplant stakeholders. An AI decision support system has significant potential, but there are challenges associated with overfitting, poor explainability, and inadequate trust. A transdisciplinary approach provides a holistic perspective that incorporates expertise from engineering, social science, and …
The Birth And Incision History Of The San Juan River In The Past 5 Ma, Micael T. Albonico
The Birth And Incision History Of The San Juan River In The Past 5 Ma, Micael T. Albonico
Earth and Planetary Sciences ETDs
This study addresses the evolution of the San Juan River system and its confluence with the Colorado River, ~ 100 km above the regionally important Lees Ferry knickzone. The San Juan River is a 600-km-long continental-scale tributary of the Colorado River. From its headwaters in the San Juan Mountains in Colorado, the San Juan River flows across the Colorado Plateau, and into the Colorado River upstream of Grand Canyon. Published apatite fission track and apatite (U-Th)/He thermochronologic data show that rocks in Marble Canyon, as well as in middle and upper reaches of the San Juan River, were >75 °C …
Exploring The Geometric And Electronic Properties Of Palladium Doped Silicon Clusters, Madison Winkeler, Ciara N. Richardson
Exploring The Geometric And Electronic Properties Of Palladium Doped Silicon Clusters, Madison Winkeler, Ciara N. Richardson
Scholars Week
Transition metal-doped silicon clusters have unique properties and have been studied as building blocks for nanomaterials and microelectronics. Here, the structure and properties of candidate palladium doped silicon clusters (SinPd2: n=1-17) were determined using global optimization techniques on a high performance computing cluster at the San Diego Supercomputing Center. Then geometric structures were further optimized utilizing the B3LYP method with 6-311+G(d) basis sets for silicon and lanl2dz pseudopotential for palladium, followed by the larger DSDPBEP86 method with 6-311+G(2d) basis sets for silicon and SDD pseudopotential for palladium, as implemented in the Gaussian 16 program package. The energetics for each cluster …