Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics Commons™

Open Access. Powered by Scholars. Published by Universities.®

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 38491 - 38520 of 294438

Full-Text Articles in Physical Sciences and Mathematics

Measurement Of The Dependence Of The Hadron Production Fraction Ratios F S/F U And F D/F U On B Meson Kinematic Variables In Proton-Proton Collisions At √S=13 Tev, A. Tumasyan Sep 2023

Measurement Of The Dependence Of The Hadron Production Fraction Ratios F S/F U And F D/F U On B Meson Kinematic Variables In Proton-Proton Collisions At √S=13 Tev, A. Tumasyan

Department of Physics and Astronomy: Faculty Publications

The dependence of the ratio between the B0s and B+ hadron production fractions, fs/fu, on the transverse momentum (pT) and rapidity of the B mesons is studied using the decay channels B0s → J/ψϕ and B+ → J/ψK+. The analysis uses a data sample of proton-proton collisions at a center-of-mass energy of 13 TeV, collected by the CMS experiment in 2018 and corresponding to an integrated luminosity of 61.6 fb−1. The fs/fu ratio is observed to depend on the B …

Go to article

Community Adaptations To Wildfire Risk In Central Oregon, Usa: An Empirical Study Of Inclusionary Practices In Collaborative Wildfire Risk Mitigation, Liam Resener Sep 2023

Community Adaptations To Wildfire Risk In Central Oregon, Usa: An Empirical Study Of Inclusionary Practices In Collaborative Wildfire Risk Mitigation, Liam Resener

Dissertations and Theses

Adverse impacts of wildfire in Western North America have become increasingly present through the 21st century, driven by landscape changes imposed by colonists in the 19th and 20th centuries. Community adaptations to wildfire will be necessary through the 21st century to restore landscapes and protect the safety and livelihoods of people who live in at-risk areas. Wildfire risk extends across countless environmental and social systems, and individuals have competing ideas about what constitutes that risk and how to best adapt to it. As resources are being allocated to community adaptations, important questions emerge about the values …

Go to article

The Influence Of Polystyrene Microplastics On Juvenile Steelhead Trout (Oncorhynchus Mykiss), Kaitlyn Marie Baker Sep 2023

The Influence Of Polystyrene Microplastics On Juvenile Steelhead Trout (Oncorhynchus Mykiss), Kaitlyn Marie Baker

Dissertations and Theses

Mass production of plastic within the past decade has led to over 100 billion tons of plastics being added to the world’s oceans through rivers and effluent disposal and decomposition. For marine environments, the sudden and constant growth of microplastics (plastics 1 µm to 5 mm in diameter), is of particular concern to top-predatory fish such as steelhead trout (Oncorhynchus mykiss), who passively or actively uptake microplastics while consuming prey. Previous research has demonstrated clear detrimental impacts of microplastic accumulation in bivalves, seabirds, and zebrafish, including decreased diet, reproduction rates, and metabolism, as well as increased rates of …

Go to article

Mass-Selected Ion–Molecule Cluster Beam Apparatus For Ultrafast Photofragmentation Studies, Xiaojun Wang, Mahmudul Hasan, Lin Fan, Yibo Wang, Hui Li, Daniel S. Slaughter, Martin Centurion Sep 2023

Mass-Selected Ion–Molecule Cluster Beam Apparatus For Ultrafast Photofragmentation Studies, Xiaojun Wang, Mahmudul Hasan, Lin Fan, Yibo Wang, Hui Li, Daniel S. Slaughter, Martin Centurion

Department of Physics and Astronomy: Faculty Publications

We describe an apparatus for investigating the excited-state dissociation dynamics of mass-selected ion–molecule clusters by mass-resolving and detecting photofragment-ions and neutrals, in coincidence, using an ultrafast laser operating at high repetition rates. The apparatus comprises a source that generates ion–molecule clusters, a time-of-flight spectrometer, and a mass filter that selects the desired anions, and a linear-plus-quadratic reflectron mass spectrometer that discriminates the fragment anions after the femtosecond laser excites the clusters. The fragment neutrals and anions are then captured by two channeltron detectors. The apparatus performance is tested by measuring the photofragments: I−, CF3I−, …

Go to article

Joint Semiparametric Kernel Network Regression, Byung Jun Kim, Inyoung Kim Sep 2023

Joint Semiparametric Kernel Network Regression, Byung Jun Kim, Inyoung Kim

Michigan Tech Publications

Variable selection and graphical modeling play essential roles in highly correlated and high-dimensional (HCHD) data analysis. Variable selection methods have been developed under both parametric and nonparametric model settings. However, variable selection for nonadditive, nonparametric regression with high-dimensional variables is challenging due to complications in modeling unknown dependence structures among HCHD variables. Gaussian graphical models are a popular and useful tool for investigating the conditional dependence between variables via estimating sparse precision matrices. For a given class of interest, the estimated precision matrices can be mapped onto networks for visualization. However, the limitation of Gaussian graphical models is that they …

Go to article

Inner Workings Of Milankovitch Cycles, Linda A. Hinnov Sep 2023

Inner Workings Of Milankovitch Cycles, Linda A. Hinnov

Sustainability Seminar Series

Milankovitch cycles are incoming solar radiation (insolation) cycles forced by variations in Earth’s orbital eccentricity, axial obliquity and precession, and are recorded on Earth in cyclostratigraphy. Insolation undergoes major daily and annual cycles with weak modulation from the obliquity variation. Thresholds in the Earth’s climate response to insolation generate the strong precession signals commonly observed in cyclostratigraphy. Dr. Hinnov will demonstrate these and other features using the insolation equation, and will discuss the manifestation of these features in key cyclostratigraphic sections.

Go to article

Approval Letter For The Butte Priority Soils Operable Unit, Final 2021 Unreclaimed Sites Sampling Ur-32 Site Evaluation Summary Report (Dated June 9, 2023), Nikia Greene Sep 2023

Approval Letter For The Butte Priority Soils Operable Unit, Final 2021 Unreclaimed Sites Sampling Ur-32 Site Evaluation Summary Report (Dated June 9, 2023), Nikia Greene

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Go to article

Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) 2022 Residential Metals Abatement Program (Non-Residential Parcels-Indoor Soil) Butte High School Indoor Soils Investigation Summary Report (Isr) (Dated August 7, 2023), Nikia Greene Sep 2023

Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) 2022 Residential Metals Abatement Program (Non-Residential Parcels-Indoor Soil) Butte High School Indoor Soils Investigation Summary Report (Isr) (Dated August 7, 2023), Nikia Greene

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Go to article

Exploring Nonprofit Views On Water Management And Conservation Strategies, Jillian Marie Farley Sep 2023

Exploring Nonprofit Views On Water Management And Conservation Strategies, Jillian Marie Farley

Dissertations and Theses

Valuing water resources presents a multitude of methodological and theoretical challenges, including economics, biodiversity, and cultural significance. Information is not readily available on the individuals working every day on water resource management and how they navigate such a complex topic. This project is designed to help all parties better understand the opinions of individuals working for nonprofit organizations and Watershed Councils in the State of Oregon about current methods of water resource conservation. The results reflect respondents’ personal views on the process and practices of valuing water and are designed to prompt deeper discussions between the organizations, communities, and policymakers. …

Go to article

North Bergen Outcrop Field And Geochemical Data, Jane L. Alexander, Sean T. Thatcher, Jay Tobon, Victoria Rivelli Sep 2023

North Bergen Outcrop Field And Geochemical Data, Jane L. Alexander, Sean T. Thatcher, Jay Tobon, Victoria Rivelli

Publications and Research

This file contains the data collected on an outcrop of the Stockton Formation in North Bergen, NJ. It contains field observations, mineralogy and geochemical data for major, trace and rare earth elements.

Go to article

Near Peer Pedagogies For Culturally Sustaining Computer Science And Mathematics, Cliff Freeman, Eli Tucker-Raymond, Juan Gutierrez Sep 2023

Near Peer Pedagogies For Culturally Sustaining Computer Science And Mathematics, Cliff Freeman, Eli Tucker-Raymond, Juan Gutierrez

Journal of Computer Science Integration

In this study, College STEM Literacy Workers act as co-teachers in 9th and 10th grade classrooms alongside mathematics teachers as they both learn to integrate a 30-hour integrated computer science/mathematics curriculum. As part of the curriculum for educator learning, we adapted the Algebra Project’s “Model of Excellence” for culturally relevant-sustaining pedagogies. We used the framework to explore how teachers understand College STEM Literacy Workers’ contributions in the model as well as College STEM Literacy Workers’ own experiences in the classroom. We found that while teachers and College STEM Literacy Workers did not individually instantiate the model of excellence, they were …

Go to article

Two New Absolute Gravity Base Stations Established In Lincoln, Ne, Kris Guthrie, Irina Filina Sep 2023

Two New Absolute Gravity Base Stations Established In Lincoln, Ne, Kris Guthrie, Irina Filina

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Two new absolute gravity base stations were established on the University of Nebraska-Lincoln City Campus in April 2022. The values were transferred with a relative gravity meter from four existing stations within 238 miles and were later validated by the National Oceanic and Atmospheric Administration. The final values at 22.5 cm above marker height are 980177.781 ± 0.010 mGal at the Lincoln Bell Tower Station and 980178.079 ± 0.010 mGal at the Lincoln Museum station with a gravity gradient of -3.105 µGal/cm. This paper describes the process of transferring gravity values and outlines recommendations for similar projects in the future.

Go to article

Butte Priority Soils Operable Unit (Bpsou) Unreclaimed And Insufficiently Reclaimed Sites Request For Change 2023-02, Mike Mcanulty Sep 2023

Butte Priority Soils Operable Unit (Bpsou) Unreclaimed And Insufficiently Reclaimed Sites Request For Change 2023-02, Mike Mcanulty

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Go to article

Approval Letter For The Butte Priority Soils Operable Unit, Draft Final Unreclaimed Sites (Ur-06) Temporary Best Management Practice (Bmp) Work Plan (May 15, 2023), Nikia Greene Sep 2023

Approval Letter For The Butte Priority Soils Operable Unit, Draft Final Unreclaimed Sites (Ur-06) Temporary Best Management Practice (Bmp) Work Plan (May 15, 2023), Nikia Greene

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Go to article

Climate Change Impacts And Adaptation To Permafrost Change In High Mountain Asia: A Comprehensive Review, Prashant Baral, Simon Allen, Jakob F. Steiner, Tika R. Gurung, Graham Mcdowell Sep 2023

Climate Change Impacts And Adaptation To Permafrost Change In High Mountain Asia: A Comprehensive Review, Prashant Baral, Simon Allen, Jakob F. Steiner, Tika R. Gurung, Graham Mcdowell

Department of Earth and Atmospheric Sciences: Faculty Publications

Changing climatic conditions in High Mountain Asia (HMA), especially regional warming and changing precipitation patterns, have led to notable effects on mountain permafrost. Comprehensive knowledge of mountain permafrost in HMA is mostly limited to the mountains of the Qinghai-Tibetan Plateau, with a strong cluster of research activity related to critical infrastructure providing a basis for related climate adaptation measures. Insights related to the extent and changing characteristics of permafrost in the Hindu Kush Himalaya (HKH), are much more limited. This study provides the first comprehensive review of peer-reviewed journal articles, focused on hydrological, ecological, and geomorphic impacts associated with thawing …

Go to article

Precision E- Beam Polarimetry At An E-E+ B Factory Using Tau-Pair Events, J. P. Lees, V. Poireau, V, Tisserand, E. Grauges, A. Palano, G. Eigen, D. N. Brown, Yu. G. Kolomensky, M. Fritsch, H. Koch, R. Cheaib, C. Hearty, T. S. Mattison, J. A. Mckenna, R. Y. So, V. E. Blinov, A. R. Buzykaev, V. P. Druzhinin, Milind Purohit, Et. Al. Sep 2023

Precision E- Beam Polarimetry At An E-E+ B Factory Using Tau-Pair Events, J. P. Lees, V. Poireau, V, Tisserand, E. Grauges, A. Palano, G. Eigen, D. N. Brown, Yu. G. Kolomensky, M. Fritsch, H. Koch, R. Cheaib, C. Hearty, T. S. Mattison, J. A. Mckenna, R. Y. So, V. E. Blinov, A. R. Buzykaev, V. P. Druzhinin, Milind Purohit, Et. Al.

Faculty Publications

We present a new technique, “tau polarimetry,” for measuring the longitudinal beam polarization present in an e+e− collider through the analysis of e+e− → τ+τ− events. By exploiting the sensitivity of τ decay kinematics to the longitudinal polarization of the beams, we demonstrate that the longitudinal polarization can be measured with a 3 per mil systematic uncertainty at the interaction point using a technique that is independent of spin and beam transport modeling. Using 424.2 ± 1.8 fb−1 of BABAR data at √ s = 10.58 GeV, the average longitudinal …

Go to article

Reu-Deim Classification Of Hispanic Voters In Hispanic Groups Using Name And Zip Code Data In Palm Beach, Florida, Kamila Soto-Ortiz Sep 2023

Reu-Deim Classification Of Hispanic Voters In Hispanic Groups Using Name And Zip Code Data In Palm Beach, Florida, Kamila Soto-Ortiz

Beyond: Undergraduate Research Journal

When it comes to registering to vote, Hispanic voters can only register as “Hispanic” in the “Race/Ethnicity” category, causing difficulties when analyzing voting trends amongst the Hispanic community. Upon the recent idea that not all Hispanic Groups vote the same, the goal is to create a model that can possibly identify a voter’s Hispanic Group with the information provided on the public Florida voter file. This is accomplished using name and zip code data for all voters in Palm Beach, Florida. This paper will explore the model implemented, its findings and limitations. Palm Beach, Florida, is met with low confidence …

Go to article

Measurement Of The Top Quark Mass Using A Profile Likelihood Approach With The Lepton + Jets Final States In Proton–Proton Collisions At √ S = 13tev, A. Tumasyan Sep 2023

Measurement Of The Top Quark Mass Using A Profile Likelihood Approach With The Lepton + Jets Final States In Proton–Proton Collisions At √ S = 13tev, A. Tumasyan

Department of Physics and Astronomy: Faculty Publications

The mass of the top quark is measured in 36.3 fb−1 of LHC proton–proton collision data collected with the CMS detector at √ s = 13 TeV. The measurement uses a sample of top quark pair candidate events containing one isolated electron or muon and at least four jets in the final state. For each event, the mass is reconstructed from a kinematic fit of the decay products to a top quark pair hypothesis. A profile likelihood method is applied using up to four observables per event to extract the top quark mass. The top quark mass is measured …

Go to article

Measurement Of The Top Quark Mass Using A Profile Likelihood Approach With The Lepton + Jets Final States In Proton–Proton Collisions At √S = 13tev, A. Tumasyan Sep 2023

Measurement Of The Top Quark Mass Using A Profile Likelihood Approach With The Lepton + Jets Final States In Proton–Proton Collisions At √S = 13tev, A. Tumasyan

Department of Physics and Astronomy: Faculty Publications

The mass of the top quark is measured in 36.3 fb−1 of LHC proton–proton collision data collected with the CMS detector at √ s = 13 TeV. The measurement uses a sample of top quark pair candidate events containing one isolated electron or muon and at least four jets in the final state. For each event, the mass is reconstructed from a kinematic fit of the decay products to a top quark pair hypothesis. A profile likelihood method is applied using up to four observables per event to extract the top quark mass. The top quark mass is measured …

Go to article

Machine Learning Techniques For The Identification Of Risk Factors Associated With Food Insecurity Among Adults In Arab Countries During The Covid-19 Pandemic, Radwan Qasrawi, Maha Hoteit, Reema Tayyem, Khlood Bookari, Haleama Al Sabbah, Iman Kamel, Somaia Dashti, Sabika Allehdan, Hiba Bawadi, Mostafa Waly, Mohammed O. Ibrahim, Stephanny Vicuna Polo, Diala Abu Al-Halawa Sep 2023

Machine Learning Techniques For The Identification Of Risk Factors Associated With Food Insecurity Among Adults In Arab Countries During The Covid-19 Pandemic, Radwan Qasrawi, Maha Hoteit, Reema Tayyem, Khlood Bookari, Haleama Al Sabbah, Iman Kamel, Somaia Dashti, Sabika Allehdan, Hiba Bawadi, Mostafa Waly, Mohammed O. Ibrahim, Stephanny Vicuna Polo, Diala Abu Al-Halawa

All Works

BACKGROUND: A direct consequence of global warming, and strongly correlated with poor physical and mental health, food insecurity is a rising global concern associated with low dietary intake. The Coronavirus pandemic has further aggravated food insecurity among vulnerable communities, and thus has sparked the global conversation of equal food access, food distribution, and improvement of food support programs. This research was designed to identify the key features associated with food insecurity during the COVID-19 pandemic using Machine learning techniques. Seven machine learning algorithms were used in the model, which used a dataset of 32 features. The model was designed to …

Go to article

Bridging The Gap Between Academic Research And Reduction To Practice: Manufacturing Scale-Up Of Polymeric Membranes For Water Treatment, David Lu, Isabel C. Escobar Sep 2023

Bridging The Gap Between Academic Research And Reduction To Practice: Manufacturing Scale-Up Of Polymeric Membranes For Water Treatment, David Lu, Isabel C. Escobar

Kentucky Water Resources Annual Symposium

No abstract provided.

Go to article

Modeling, Managing, And Mitigating Stormwater Flooding Using A Real-Time Monitoring Network And Environmental Equity Approach, Ben Hauschild, Jason S. Polk, Trayson Lawler, Adam Desloge Sep 2023

Modeling, Managing, And Mitigating Stormwater Flooding Using A Real-Time Monitoring Network And Environmental Equity Approach, Ben Hauschild, Jason S. Polk, Trayson Lawler, Adam Desloge

Kentucky Water Resources Annual Symposium

No abstract provided.

Go to article

Stormwater Management Advances Using Smart Sensing Network Architecture For Precipitation Monitoring, Brittany Pekara, Jason S. Polk, James Adam Shelley Sep 2023

Stormwater Management Advances Using Smart Sensing Network Architecture For Precipitation Monitoring, Brittany Pekara, Jason S. Polk, James Adam Shelley

Kentucky Water Resources Annual Symposium

No abstract provided.

Go to article

Development Of A Spatial And Statistical Diagnostic Tool To Prioritize Pfas Sample Locations In Kentucky Surface Waters, Ariel Robinson, Angela Gutierrez, Kelly G. Pennell Sep 2023

Development Of A Spatial And Statistical Diagnostic Tool To Prioritize Pfas Sample Locations In Kentucky Surface Waters, Ariel Robinson, Angela Gutierrez, Kelly G. Pennell

Kentucky Water Resources Annual Symposium

No abstract provided.

Go to article

A Flood Of Consequences In Louisville, Kentucky: Using Hgis To Track Refugees Impacted By The 1937 Ohio River Flood, Trevor Harry, Margaret M. Gripshover Sep 2023

A Flood Of Consequences In Louisville, Kentucky: Using Hgis To Track Refugees Impacted By The 1937 Ohio River Flood, Trevor Harry, Margaret M. Gripshover

Kentucky Water Resources Annual Symposium

No abstract provided.

Go to article

Sewer Gas, Siphons And Long-Term Stewardship For Community Interventions, Hong Cheng Tay, Kelly G. Pennell Sep 2023

Sewer Gas, Siphons And Long-Term Stewardship For Community Interventions, Hong Cheng Tay, Kelly G. Pennell

Kentucky Water Resources Annual Symposium

No abstract provided.

Go to article

Perceptions And Visual Awareness Of Urban Karst Flooding To Inform Preparedness Planning And Management Actions, Grace Herrmann, Jason Polk Sep 2023

Perceptions And Visual Awareness Of Urban Karst Flooding To Inform Preparedness Planning And Management Actions, Grace Herrmann, Jason Polk

Kentucky Water Resources Annual Symposium

No abstract provided.

Go to article

Blended Learning In The Wake Of Ict Infrastructure Deficiencies: The Case Of A Zimbabwean University, Lucia Makwasha, Sam Jnr Takavarasha, Hazel Mubango Sep 2023

Blended Learning In The Wake Of Ict Infrastructure Deficiencies: The Case Of A Zimbabwean University, Lucia Makwasha, Sam Jnr Takavarasha, Hazel Mubango

African Conference on Information Systems and Technology

In the wake of debates between actors in the Zimbabwean higher education sector about the effectiveness of e-learning models, it is important to investigate the effectiveness of using blended learning at a time when infrastructure challenges are disrupting ICT access. This paper aims to address this quest for a deeper understanding by investigating students' perceptions of blended learning at a selected Zimbabwean university. Twelve in-depth interviews were conducted with students from a Zimbabwean university that employs blended learning under an interpretivist paradigm. Vygotsky's Zone of Proximal Development (ZPD) was used for conceptualising students' cognitive development and Engestrom's (2003) Third-generation Activity …

Go to article

Factors Influencing User Adherence Towards Privacy Standards Of Internet Of Things Devices, Philip Bazanye, Walter Uys, Wallace Chigona Sep 2023

Factors Influencing User Adherence Towards Privacy Standards Of Internet Of Things Devices, Philip Bazanye, Walter Uys, Wallace Chigona

African Conference on Information Systems and Technology

The upsurge in the use of Internet of things (IoT) devices increases the likelihood of cyber-attacks on end users. The objective of the study reported here was to investigate the factors that influence IoT device users’ adherence to privacy standards. This interpretivist exploratory research was guided by a three-phased approach using activity theory. The interview questions were derived from the conceptual model and themes analysed using deductive thematic analysis. The findings indicate that a lack of adherence is driven by a lack of trust in IoT devices and service providers, as well as convenience and health factors. In addition, users’ …

Go to article

Contaminant Transport Mechanisms And Source Tracking In Karst Groundwater Systems Under Agriculture Land Use, Shreya Pandley, Jason S. Polk Sep 2023

Contaminant Transport Mechanisms And Source Tracking In Karst Groundwater Systems Under Agriculture Land Use, Shreya Pandley, Jason S. Polk

Kentucky Water Resources Annual Symposium

No abstract provided.

Go to article

First Prev Next Last