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 60151 - 60180 of 302616

Full-Text Articles in Physical Sciences and Mathematics

Student Pages - Nyc Neighborhoods: Health And Wealth, Center For Urban Resilience Apr 2021

Student Pages - Nyc Neighborhoods: Health And Wealth, Center For Urban Resilience

Module 05: Public Health & Water Quality

No abstract provided.


Student Pages - Answer Key - Nyc Neighborhoods: Health And Wealth, Center For Urban Resilience Apr 2021

Student Pages - Answer Key - Nyc Neighborhoods: Health And Wealth, Center For Urban Resilience

Module 05: Public Health & Water Quality

No abstract provided.


Student Pages - Comparing Two Nyc Neighborhoods, Center For Urban Resilience Apr 2021

Student Pages - Comparing Two Nyc Neighborhoods, Center For Urban Resilience

Module 05: Public Health & Water Quality

No abstract provided.


Lesson Plan - Public Health Action Plan, Center For Urban Resilience Apr 2021

Lesson Plan - Public Health Action Plan, Center For Urban Resilience

Module 05: Public Health & Water Quality

The purpose of this lesson is to revisit the driving question introduced in lesson 1 of this module: How can I make my neighborhood a healthier place to live? Students synthesize what they have learned across the module - that healthy neighborhoods have green space, robust social networks, effective waste delivery and waste removal, clean air and healthy foods. They use this general information to analyze a proposed exercise path. Students work in groups to address the action plan topic for this module: resources, both social and material. For this action plan, there is a specific focus on discussing resources …


Powerpoint - Identify Resources, Center For Urban Resilience Apr 2021

Powerpoint - Identify Resources, Center For Urban Resilience

Module 05: Public Health & Water Quality

No abstract provided.


Student Pages - Public Health Action Plan, Center For Urban Resilience Apr 2021

Student Pages - Public Health Action Plan, Center For Urban Resilience

Module 05: Public Health & Water Quality

No abstract provided.


Dynamic Topography Of The St. Francois Mountains, Joshua Carpenter Apr 2021

Dynamic Topography Of The St. Francois Mountains, Joshua Carpenter

Undergraduate Research Conference at Missouri S&T

The purpose of this research project was to search for evidence of relict topographic surfaces in the St. Francois Mountains that preserve a history of regional and/or global forces. To accomplish this, topographic cross-sections were taken in Google Earth to examine changes in the region's topography with focus towards the following features: sub-horizontal surfaces, knickpoints, and valley floors. Elevation data was then collected and plotted in Excel. This revealed sub-horizontal surfaces between elevations of ~1780-1545 ft; knickpoints between ~1700-900 ft; and valley floors at ~1470-1350 ft. and ~1200-900 ft. The sub-horizontal surfaces are interpreted as relict peneplains preserved during periods …


Volume 7 Full Text, Bjur Staff Apr 2021

Volume 7 Full Text, Bjur Staff

Butler Journal of Undergraduate Research

No abstract provided.


Table Of Contents And Front Matter, Bjur Staff Apr 2021

Table Of Contents And Front Matter, Bjur Staff

Butler Journal of Undergraduate Research

No abstract provided.


A Man Out West Is A Man, Nikola Andric Apr 2021

A Man Out West Is A Man, Nikola Andric

Undergraduate Research Conference at Missouri S&T

The goal of this research is to analyze who the cowboys were and show how the standard set for the cowboy in novels remained consistent during the period between 1902 and 1953. The presentation allows readers to think of their idea of a cowboy and then compare it with the idea of the cowboy drawn from the books used in the research. It is a great opportunity to find out who the perfect cowboy is, what cowboys' relationships with their horses look like, what is considered good, and what is considered evil during those fifty years. Above all, the most …


Mapping Renewal: How An Unexpected Interdisciplinary Collaboration Transformed A Digital Humanities Project, Elise Tanner, Geoffrey Joseph Apr 2021

Mapping Renewal: How An Unexpected Interdisciplinary Collaboration Transformed A Digital Humanities Project, Elise Tanner, Geoffrey Joseph

Digital Initiatives Symposium

Funded by a National Endowment for Humanities (NEH) Humanities Collections and Reference Resources Foundations Grant, the UA Little Rock Center for Arkansas History and Culture’s “Mapping Renewal” pilot project focused on creating access to and providing spatial context to archival materials related to racial segregation and urban renewal in the city of Little Rock, Arkansas, from 1954-1989. An unplanned interdisciplinary collaboration with the UA Little Rock Arkansas Economic Development Institute (AEDI) has proven to be an invaluable partnership. One team member from each department will demonstrate the Mapping Renewal website and discuss how the collaborative process has changed and shaped …


Small-Scale Wind Power Prediction, Nathan Skelton Apr 2021

Small-Scale Wind Power Prediction, Nathan Skelton

Undergraduate Research Conference at Missouri S&T

This study is focused on the development of viable power generation modeling for small scale wind power installations. Armed with a viable model, businesses and individuals would have another option to reliably power small-scale buildings or installations. This study defines small-scale wind power turbines as those installed on buildings, or otherwise operating under 30 meters (~100 feet). Both of these installation environments provide inconsistent wind speeds, among other properties, that most wind power models do not address. Through the development of a sample wind turbine and accompanying weather station, multiple methods of prediction have been implemented with varying degrees of …


Tempered Fbm With Reflecting Walls, Zachary Miller Apr 2021

Tempered Fbm With Reflecting Walls, Zachary Miller

Undergraduate Research Conference at Missouri S&T

Fractional Brownian Motion (FBM) is a Gaussian stochastic process with long-range correlations and a paradigmatic model for anomalous diffusion. For FBM confined by reflecting boundaries, recent work [1] demonstrated unusual accumulation and depletion of particles close to the walls. In many applications of FBM to physics, chemistry, and beyond, the long-range correlations are cut off (tempered) beyond a certain time scale [2]. Here, we study the behavior of tempered FMB in the presence of reflecting walls. More specifically, we analyze the probability density of tempered FBM on a one-dimensional interval between two reflecting wall.


Generating Effective Sentence Representations: Deep Learning And Reinforcement Learning Approaches, Mahtab Ahmed Apr 2021

Generating Effective Sentence Representations: Deep Learning And Reinforcement Learning Approaches, Mahtab Ahmed

Electronic Thesis and Dissertation Repository

Natural language processing (NLP) is one of the most important technologies of the information age. Understanding complex language utterances is also a crucial part of artificial intelligence. Many Natural Language applications are powered by machine learning models performing a large variety of underlying tasks. Recently, deep learning approaches have obtained very high performance across many NLP tasks. In order to achieve this high level of performance, it is crucial for computers to have an appropriate representation of sentences. The tasks addressed in the thesis are best approached having shallow semantic representations. These representations are vectors that are then embedded in …


Water Splitting By Mixed Chalcogenide Catalysts, Isabella Feltenstein Apr 2021

Water Splitting By Mixed Chalcogenide Catalysts, Isabella Feltenstein

Undergraduate Research Conference at Missouri S&T

The depleting supply of fossil fuels has led to deeper investigation of water-splitting as a sustainable energy source. Specifically, using transition metal chalcogenides to catalyze the water-splitting reaction through oxygen and hydrogen evolution reactions. While the decreasing electronegativity of the chalcogenide group increases their activity, it also decreases their stability, leading to the investigation of mixed anion chalcogenides in order to keep both the stability and activity high. This research will further the understanding and efficiency of water-splitting for energy storage and inspire more research in the future. In these experiments, cobalt telluroselenide (Cox-Tey-Sez) and nickel telluroselenide (Nix-Tey-Sez) catalysts were …


Sample Preparation Affects Non Structural Carbohydrates In Alfalfa, Gaëtan F. Tremblay, Annick Bertrand, Yves Castonguay, Gilles Bélanger, Sophie Pelletier, Réal Michaud Apr 2021

Sample Preparation Affects Non Structural Carbohydrates In Alfalfa, Gaëtan F. Tremblay, Annick Bertrand, Yves Castonguay, Gilles Bélanger, Sophie Pelletier, Réal Michaud

IGC Proceedings (1993-2023)

No abstract provided.


Nitrogen Intake And Utilisation Pattern In The Digestive Tract Of Sheep Grazing Four Subtropical Foggages, Willem A. Van Niekerk, Abubeker Hassen Apr 2021

Nitrogen Intake And Utilisation Pattern In The Digestive Tract Of Sheep Grazing Four Subtropical Foggages, Willem A. Van Niekerk, Abubeker Hassen

IGC Proceedings (1993-2023)

No abstract provided.


Effect Of Genotype And Cutting System On Agronomic And Feed Quality Characteristics Of Perennial Ryegrass (Lolium Perenne L.) Grown In Three Sites In Northern Germany, H. Salama, M. Lösche, Antje Herrmann, M. Gierus, Friedhelm Taube Apr 2021

Effect Of Genotype And Cutting System On Agronomic And Feed Quality Characteristics Of Perennial Ryegrass (Lolium Perenne L.) Grown In Three Sites In Northern Germany, H. Salama, M. Lösche, Antje Herrmann, M. Gierus, Friedhelm Taube

IGC Proceedings (1993-2023)

No abstract provided.


Fermentative Profile Of Soybean Silages Treated With Molasses And Microbial Inoculant, Odilon G. Pereira, L. O. Rosa, E. M. Santos Apr 2021

Fermentative Profile Of Soybean Silages Treated With Molasses And Microbial Inoculant, Odilon G. Pereira, L. O. Rosa, E. M. Santos

IGC Proceedings (1993-2023)

No abstract provided.


Bang The Can Slowly: An Investigation Into The 2017 Houston Astros, Ryan Elmore, Gregory J. Matthews Apr 2021

Bang The Can Slowly: An Investigation Into The 2017 Houston Astros, Ryan Elmore, Gregory J. Matthews

Mathematics and Statistics: Faculty Publications and Other Works

This article is a statistical investigation into the 2017 Major League Baseball scandal involving the Houston Astros, the World Series championship winner that the same year. The Astros were alleged to have stolen their opponents’ pitching signs in order to provide their batters with a potentially unfair advantage. This work finds compelling evidence that the Astros on-field performance was significantly affected by their sign-stealing ploy and quantifies the effects. The three main findings in the article are (i) the Astros’ odds of swinging at a pitch were reduced by approximately 27% (OR: 0.725, 95% CI: (0.618, 0.850)) when the sign …


Markov Chains And Their Applications, Fariha Mahfuz Apr 2021

Markov Chains And Their Applications, Fariha Mahfuz

Math Theses

Markov chain is a stochastic model that is used to predict future events. Markov chain is relatively simple since it only requires the information of the present state to predict the future states. In this paper we will go over the basic concepts of Markov Chain and several of its applications including Google PageRank algorithm, weather prediction and gamblers ruin.

We examine on how the Google PageRank algorithm works efficiently to provide PageRank for a Google search result. We also show how can we use Markov chain to predict weather by creating a model from real life data.


Vegetation Type And Decomposition Priming Mediate Brackish Marsh Carbon Accumulation Under Interacting Facets Of Global Change, Anthony J. Rietl, J. Patrick Megonigal, Ellen R. Herbert, Matthew L. Kirwan Apr 2021

Vegetation Type And Decomposition Priming Mediate Brackish Marsh Carbon Accumulation Under Interacting Facets Of Global Change, Anthony J. Rietl, J. Patrick Megonigal, Ellen R. Herbert, Matthew L. Kirwan

VIMS Articles

Coastal wetland carbon pools are globally important, but their response to interacting facets of global change remain unclear. Numerical models neglect species-specific vegetation responses to sea level rise (SLR) and elevated CO2 (eCO2) that are observed in field experiments, while field experiments cannot address the long-term feedbacks between flooding and soil growth that models show are important. Here, we present a novel numerical model of marsh carbon accumulation parameterized with empirical observations from a long-running eCO2 experiment in an organic rich, brackish marsh. Model results indicate that eCO2 and SLR interact …


The Power Of Information: Information, Leak Notices, And Water Conservation In Edina, Mn, Federico Chung Apr 2021

The Power Of Information: Information, Leak Notices, And Water Conservation In Edina, Mn, Federico Chung

Economics Honors Projects

This paper provides evidence on the effects of information provision on households’ water use. I use quarterly household consumption data from a utility in Minnesota to test the effect of a new residential water billing system on households’ water consumption. The updated billing format was possible as the utility transitioned to an automated meter reading (AMR) system. I also study impacts of another source of improved information provision from AMR adoption, faster high-water consumption notices. I find mixed evidence of the impact of personalized information on households’ water use. Households respond to high-consumption notices by significantly reducing consumption, even relative …


Bioaccumulation And Partitioning Of Heavy Metals In Cicindelidia Haemorrhagica In Yellowstone National Park, Monica Gotschall Apr 2021

Bioaccumulation And Partitioning Of Heavy Metals In Cicindelidia Haemorrhagica In Yellowstone National Park, Monica Gotschall

School of Natural Resources: Dissertations, Theses, and Student Research

The tiger beetle Cicindelidia haemorrhagica (Coleoptera: Cicindelidae) are widely distributed in Yellowstone National Park (YNP) and exclusively living on thermal areas. Heavy metals including arsenic, copper, lead, and selenium are present in these thermal springs, presenting an unique environment for C. haemorrhagica. Therefore, from 2018 – 2020 I sampled adult C. haemorrhagica from YNP and adult C. haemorrhagica from a known population in a salt flat in Idaho not associated with a hot spring and measured heavy metal concentrations. All populations of C. haemorrhagica bioaccumulated heavy metals. Cuticular waxes showed small concentrations of metals indicating that those metals are …


Thermal, Mechanical, And Rehealing Properties Of Cross-Linked Ionene Networks, Katelyn Lindenmeyer Apr 2021

Thermal, Mechanical, And Rehealing Properties Of Cross-Linked Ionene Networks, Katelyn Lindenmeyer

Honors College Theses

Polymers which contain ionic liquid groups have numerous applications in a wide variety of fields. Past research from our group has shown that IL-containing polymers which exist in covalently crosslinked networks can exhibit good ionic conductivities despite the hindrance in polymer chain mobility and relaxation. In part one of this thesis, efforts to create ionic networks which have the capability of being rehealed after exposure to an external stimulus are discussed. Thermoreversible maleimide-furan chemistry was incorporated into an imidazolium-containing ionene network. Maleimide-terminated, imidazolium-containing monomers were coupled with furan-functionalized monomers, prepared from commercially available multifunctional acrylates. Thermal, mechanical and rheological characterization …


On The Role Of Resonances In Polluting White Dwarfs By Asteroids, Jeremy L. Smallwood, Rebecca G. Martin, Mario Livio, Dimitri Veras Apr 2021

On The Role Of Resonances In Polluting White Dwarfs By Asteroids, Jeremy L. Smallwood, Rebecca G. Martin, Mario Livio, Dimitri Veras

Physics & Astronomy Faculty Research

Pollution of white dwarf atmospheres may be caused by asteroids that originate from the locations of secular and mean-motion resonances in planetary systems. Asteroids in these locations experience increased eccentricity, leading to tidal disruption by the white dwarf. We examine how the ν6 secular resonance shifts outwards into a previously stable region of the asteroid belt, as the star evolves to a white dwarf. Analytic secular models require a planet to be engulfed in order to shift the resonance. We show with numerical simulations that as a planet gets engulfed by the evolving star, the secular resonance shifts and the …


Electrochemical Gating Single-Molecule Circuits With Parallel Paths, Jun-Qing Su, Yi-Fan Zhou, Ling Tong, Ya-Hao Wang, Ju-Fang Zheng, Jing-Zhe Chen, Xiao-Shun Zhou Apr 2021

Electrochemical Gating Single-Molecule Circuits With Parallel Paths, Jun-Qing Su, Yi-Fan Zhou, Ling Tong, Ya-Hao Wang, Ju-Fang Zheng, Jing-Zhe Chen, Xiao-Shun Zhou

Journal of Electrochemistry

Electrochemical gating has emerged as a feasible and powerful method to tune single-molecule conductance. Herein, we demonstrate that the electron transport through single-molecule circuits with two benzene rings in parallel could be efficiently gated by electrochemistry. The molecular junctions with two parallel paths are fabricated with Au electrodes by STM break junction (STM-BJ) technique. Their conductance value exhibits a 2.82-fold enhancement by the constructive quantum interference compared to single-molecule junctions with single path for electron tunneling. Furthermore, the conductance of para-benzene based molecule could be electrochemically tuned with a modulation ratio of about 333%·V-1. With the help of …


Shedding Light On Dark Patterns: A Case Study On Digital Harms, Noreen Y. Whysel Apr 2021

Shedding Light On Dark Patterns: A Case Study On Digital Harms, Noreen Y. Whysel

Publications and Research

You’ve been there before. You thought you could trust someone with a secret. You thought it would be safe, but found out later that they blabbed to everyone. Or maybe they didn’t share it, but the way they used it felt manipulative. You gave more than you got and it didn’t feel fair. But now that it’s out there, do you even have control anymore?

Ok. Now imagine that person was your supermarket. Or your bank. Or your boss.

As designers of digital spaces for consumer products and services, how often do we consider the relationship we have with our …


Maternal Methylmercury Exposure Through Rice Ingestion And Child Neurodevelopment In The First Three Years: A Prospective Cohort Study In Rural China, Sarah E. Rothenberg, Susan A. Korrick, Jihong Liu, Yanfen Nong, Chuan Hong, Eva P. Trinh, Xu Jiang, Fred J. Biasini, Fengxiu Ouyang Apr 2021

Maternal Methylmercury Exposure Through Rice Ingestion And Child Neurodevelopment In The First Three Years: A Prospective Cohort Study In Rural China, Sarah E. Rothenberg, Susan A. Korrick, Jihong Liu, Yanfen Nong, Chuan Hong, Eva P. Trinh, Xu Jiang, Fred J. Biasini, Fengxiu Ouyang

Faculty Publications

Background

Rice is an important dietary source for methylmercury; however, rice does not contain the same beneficial nutrients as fish. Our main objective was to assess associations of prenatal methylmercury exposure through rice ingestion with child neurodevelopment in rural China.

Methods

Eligible peripartum women were enrolled (n = 391), provided peripartum hair samples, and children’s neurodevelopment was assessed at 12 months (n = 264, 68%) and 36 months (n = 190, 48%) using the Bayley Scales of Infant Development, 2nd Edition, including the Mental Developmental Index (MDI) and the Psychomotor Developmental Index (PDI). Associations between prenatal methylmercury …


Preparation And Characterization Of “Water-In-Salt” Polymer Electrolyte For Lithium-Ion Batteries, Xu Hou, Xin He, Jie Li Apr 2021

Preparation And Characterization Of “Water-In-Salt” Polymer Electrolyte For Lithium-Ion Batteries, Xu Hou, Xin He, Jie Li

Journal of Electrochemistry

Since the development of wearable and flexible electronic products, the demand of flexible energy storage devices such as batteries and super capacitors is in urgent. To enhance the safety and cycling stability for flexible lithium-ion batteries, “water-in-salt” polymer electrolyte was prepared by introducing 21 mol·kg-1 LiTFSI electrolyte into cross-linked polyacrylamide (PAM) after freeze-drying. A great amount of holes with the size range of 10 ~ 20 μm can be found on the surface and in the bulk of polyacrylamide, which is benefited from the freeze-drying process and acts as a great support for the electrolyte uptake. The “water-in-salt” polymer …