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Articles 121 - 150 of 3639
Full-Text Articles in Physical Sciences and Mathematics
Electric Utility Performance In The Mountain West, Hira Ahmed, Miguel Soriano Ralston, Caitlin J. Saladino, William E. Brown Jr.
Electric Utility Performance In The Mountain West, Hira Ahmed, Miguel Soriano Ralston, Caitlin J. Saladino, William E. Brown Jr.
Environment
This fact sheet examines select data from the Citizens Utility Board (CUB) report, “Electric Utility Performance: A State-By-State Review,” which provides information on the affordability, reliability, and environmental responsibility of electric utility energy consumption. The original report provides a comprehensive state-by-state profile of utility performance in the United States. These data were originally reported by the Energy Information Administration (EIA) of the U.S. Department of Energy. This federal entity is responsible for the aggregation and dissemination of information about the American energy industry. This fact sheet highlights energy sources, affordability, reliability, and environmental impact of energy consumption in the Mountain …
Recycling In The Mountain West, Zachary Billot, Caitlin J. Saladino, William E. Brown Jr.
Recycling In The Mountain West, Zachary Billot, Caitlin J. Saladino, William E. Brown Jr.
Environment
This fact sheet synthesizes data on rates of recycling from the March 2021 report "50 States of Recycling," sponsored by the Ball Corporation.The information presented in this document focuses on the effectiveness of recycling in total and by recyclable item, as well as the quantity of product recycled specifically within the Mountain West states of Arizona, Colorado, Nevada, New Mexico, and Utah.
Resident Scientists-In-Schools: Harnessing Altruism In Stem, Alison Sloat
Resident Scientists-In-Schools: Harnessing Altruism In Stem, Alison Sloat
UNLV Best Teaching Practices Expo
The Resident Scientists-in-Schools and the STEM Teacher Development Academy program helps to diversify and expand the STEM pipeline in CCSD schools.
Why Are My Rates Going Up? An Examination Behind Nv Energy's Recent Electric Rate Increase, Grace Zielinski
Why Are My Rates Going Up? An Examination Behind Nv Energy's Recent Electric Rate Increase, Grace Zielinski
Undergraduate Research Symposium Lightning Talks
96% of Nevadans live in NV Energy's service territory. Rate increase directly connected to natural gas consumption rate increase. Recent Californian heatwave raised demand for Natural Gas, straining supply and increasing prices. NV Energy does not make profit over recent increase. Electric rate increase implemented to cover the Natural Gas price increase.
A Literature Review On Developments In Timber Design And Its Impact On Carbon Emissions, Raquel Jackson
A Literature Review On Developments In Timber Design And Its Impact On Carbon Emissions, Raquel Jackson
Undergraduate Research Symposium Posters
Carbon dioxide emissions are a growing issue worldwide as urbanization and industrialization continues to increase (ie. Steel and concrete). Non-renewable resources limit steel and concrete production. Despite current methods to reduce greenhouse gasses, carbon emissions remain difficult to reduce from steel and concrete industries.
An Exploratory Factor Analysis Of Climate Friendly Purchasing Choices, Susan E. Gutierrez, Fred Vincent Y. Margallo, Zihan Gong
An Exploratory Factor Analysis Of Climate Friendly Purchasing Choices, Susan E. Gutierrez, Fred Vincent Y. Margallo, Zihan Gong
Undergraduate Research Symposium Posters
Climate change is negatively affecting the environment and all its inhabitants. People's increased awareness have made them more willing to adopt more climate friendly purchasing choices. The Climate Change Action Inventory measures how often individuals take actions that can reduce climate change. We focused on the Climate Friendly Purchasing Choices Domain. We conducted an exploratory factor analysis of the Climate Friendly Purchasing Domain to help us examine the factor structure.
Development Of A Novel Ionic Liquid-Coated Adsorbent For Treating Emerging Contaminants In Recycled Water On The International Space Station, Madeline Carroll, Gabson Baguma, Savanna Vacek
Development Of A Novel Ionic Liquid-Coated Adsorbent For Treating Emerging Contaminants In Recycled Water On The International Space Station, Madeline Carroll, Gabson Baguma, Savanna Vacek
Undergraduate Research Symposium Posters
Synthesize at least 3 biobased ionic liquids. Optimize method for conducting liquid-liquid extractions. Analyze and quantify how much DMSO2 is removed by the ionic liquids. Coat biochar with the most effective biobased ionic liquids.
Groundwater Remediation Using Modified Biochar, Kers Ung-Watson, Ismail Abdulraheem, Nikki Tibayan, Suraj Pochampally
Groundwater Remediation Using Modified Biochar, Kers Ung-Watson, Ismail Abdulraheem, Nikki Tibayan, Suraj Pochampally
Undergraduate Research Symposium Posters
Biochar, a lightweight black residue made of carbon, has proved to be an effective adsorbent to remove TCE from groundwater. Not only is it an economical substitute for conventional adsorbents but it can be created by using a variety of organic materials. For this project, it will rely on walnut shell feedstock to create biochar as this had the best ability to adsorb TCE.
Nuclear Power Plant In Las Vegas, Ryan W. Murray
Nuclear Power Plant In Las Vegas, Ryan W. Murray
Undergraduate Research Symposium Posters
This research focuses on the impact of a “Nuclear Power Plant in Las Vegas” or ‘NPP in LV’ for short. Nuclear power is clean, has no greenhouse gas emissions, and has a moderate cost of kilowatt hours. Las Vegas, or more specifically Clark County uses Gas power plants to produce a majority of their electricity. My project will show what a nuclear plant could do if built in the city of Las Vegas. What is a Nuclear power plant? The EIA’s definition is “A nuclear power plant uses the heat that a nuclear reactor produces to turn water into steam, …
Poliovirus Detection In Las Vegas Wastewater, Sage Boss, Hayley Baker, Ching-Lan Chang
Poliovirus Detection In Las Vegas Wastewater, Sage Boss, Hayley Baker, Ching-Lan Chang
Undergraduate Research Symposium Posters
Wastewater surveillance for poliovirus is a useful tool for spatial surveillance and evaluation of immunization efficacy. Polio testing in wastewater has been conducted since the 1980s in Finland and Israel, and the virus was recently discovered in New York. With increasing concern regarding the vaccination of children against the virus, there has been worry that polio cases could once again present themselves in the Las Vegas Valley. By testing for the virus in wastewater, we can monitor any new cases or outbreaks that occur and inform authorities as to the location and viral count. The wastewater samples were collected at …
The Analysis Of Radio And X-Ray Energetics Of Fast Radio Bursts, Emily Huerta
The Analysis Of Radio And X-Ray Energetics Of Fast Radio Bursts, Emily Huerta
Undergraduate Research Symposium Posters
Here, we analyze the graphs and figures presented in Laha et al. (2022) and compare their slopes to our figures. Laha et al. (2022) includes two graphs, one that shows a comparison between radio fluence vs. x-ray fluence and radio energy vs. x-ray energy. In these graphs, the slopes are anywhere from 3.3e-14 to 2e-5, which are much less than unity. Our figures are consistent with these values, also providing slopes anywhere between the same range. Strong limits on this ratio between radio and x-ray energetics can either support the magnetar progenitor model, or completely dismiss it. Since we found …
The Global Effects Of Climate Change: Detrimental Impacts On The Environment, Ecosystem, Coral Reefs, Human Health/Well-Being, And Global Economy, Lucky Heng
Undergraduate Research Symposium Posters
Despite criticism, scientists have been continuing to find more evidence to prove that the threats on the coral reefs around the world are real. The impact of rising climate temperature, pollution, ocean acidification, etc. has been leading to increasing amounts of mass bleaching and a massive decline in coral reefs in past decades. This research study utilizes a systematic literature review and secondary research to collect, analyze and provide evidence that climate change impacts the ecosystem, and marine life (coral reefs) species on the planet. By addressing the impact of climate change and its significance on the ecosystem and global …
Trapping And Cooling Of Ca+ For Cold Ion-Radical Collisions, Bernardo Gutierrez
Trapping And Cooling Of Ca+ For Cold Ion-Radical Collisions, Bernardo Gutierrez
Undergraduate Research Symposium Posters
Free radicals are molecules that contain an unpaired valence electron which induces high reactivity. Ion radical reactions are typically exothermic and have low (or zero) activation energy. It is for these reasons that ion-radical reactions are believed to dominate in interstellar clouds where temperatures hover around 3-10K. State-to-state measurements require precision control of both reactants.
3-D Visualizations Of Terrestial Exoplanet Interiors Generated With Magrathea In Blender, Tristan Benally, David Rice
3-D Visualizations Of Terrestial Exoplanet Interiors Generated With Magrathea In Blender, Tristan Benally, David Rice
Undergraduate Research Symposium Posters
There has been significant progress in simulating exoplanet interiors in the past decade. With the discovery of the TRAPPIST-1 system in the last few years, there have been many publications presenting models to best characterize specific aspects of exoplanets in study. However, with more parameters and considerations for different characteristics of an exoplanet there will be a need to represent many findings into a comprehensive model in the future. We extend the capabilities of MAGRATHEA from a planet interior solver to start incorporating multi-faceted functions starting with generating 3-D terrestrial planetary visualizations using a 3-D open-source computer graphic software called …
Drought Levels In Nevada Counties, 2022, Julianna Jovillar, Caitlin J. Saladino, William E. Brown Jr.
Drought Levels In Nevada Counties, 2022, Julianna Jovillar, Caitlin J. Saladino, William E. Brown Jr.
Environment
This fact sheet synthesizes data on drought levels within Nevada counties from the National Integrated Drought Information System (NIDIS) in 2022. The information presented in this document focuses on the breakdown of the number of Nevada residents affected by the droughts within each county and the drought experience in each county.
Towards The Electronic Response Of Carbon-Based Van Der Waals Heterostructures In A Diamond Anvil Cell, George Thomas Foskaris
Towards The Electronic Response Of Carbon-Based Van Der Waals Heterostructures In A Diamond Anvil Cell, George Thomas Foskaris
UNLV Theses, Dissertations, Professional Papers, and Capstones
The nanoscale regime of materials has been at the forefront of research and interest in condensed matter physics for many years. In a merger of the fields of two-dimensional (2D) materials and high pressure physics, we present an investigation of the electronic response of carbon-based, van der Waals (vdW) heterostructures in a diamond anvil cell (DAC). Combining these fields presents us with the ability to study the characteristics of such systems both optically, and through electrical transport. Properties such as conductance, band structure, and layer number are considered. The samples in this study are assembled using exfoliation and stacking techniques …
Calcite Spherulite Formations And Their Controls In Halophilic Bacterial Cultures, Zakaria Jibrin
Calcite Spherulite Formations And Their Controls In Halophilic Bacterial Cultures, Zakaria Jibrin
UNLV Theses, Dissertations, Professional Papers, and Capstones
This study arose from an accidental discovery of calcite spherulites forming on colonies of various halophilic bacteria grown on solid Luria-Bertani medium made containing water from a brine pool in Death Valley, their natural habitat. Further studies with a large spherulite forming bacteria, Pseudoalteromonas haloplanktis, showed that calcite precipitation conditions were the consequence of bacteria using amino acids as a source of carbon and energy, a metabolism that produces NH3 and CO2 waste products. NH3 raises the pH of the medium, turning CO2 into CO32-. Calcium in the natural brine combines with CO32-. The resulting spherulitic calcite precipitation is nano-acicular …
Display Applications For Grating Angle Magnification Accelerated Angular Scanners, Daniel Jesus Valdes
Display Applications For Grating Angle Magnification Accelerated Angular Scanners, Daniel Jesus Valdes
UNLV Theses, Dissertations, Professional Papers, and Capstones
This work includes experimental demonstrations of grating angle magnification accelerated optical beam scanners. Diffraction grating scanners governed by the grating equation can have scan speed advantages over the flat mirror bound by Snell's law of reflection. Scan speed enhancement of 750% was achieved with a 635nm laser and 1800 groove/mm diffraction grating configuration thanks to the grating angle magnification. A three-color diffraction grating scanner shows identical results at larger scan angles. Tunable acceleration speed is a feature enabled by the diffraction grating scanner to operate in a high-speed scanning region and/or high-resolution scanning region depending on the demands of the …
Hydrogeologic Heterogeneity Identification: Using Inverse Modeling Of Synthetic Borehole Temperatures To Predict Groundwater Flux, Kevin Heintz
UNLV Theses, Dissertations, Professional Papers, and Capstones
Heat has been effectively used as a groundwater tracer for decades, and high-resolution temperature data can better identify and quantify discrete flow zones. Refinements to the numerical modeling of advective heat transfer in borehole temperature sensing deployments can improve understanding of dynamic hydrogeologic systems. In my thesis, I develop a novel two-dimensional coupled radial groundwater flow and heat transfer numerical model that considers intra-borehole vertical flow. To test the performance of this model, I used finite element analysis to generate synthetic data sets consisting of prescribed variable flow fields and resulting borehole temperatures. I input synthetic temperatures into the two-dimensional …
Estimation Of The Parameters In A Mixture Of Two Normal Distributions And The Generalized Pivotal Quantity Method, Md Faruk Hossain
Estimation Of The Parameters In A Mixture Of Two Normal Distributions And The Generalized Pivotal Quantity Method, Md Faruk Hossain
UNLV Theses, Dissertations, Professional Papers, and Capstones
A pivotal quantity is a random variable that is a function of both the random data and the unknown population parameters and whose probability distribution does not depend on any of the unknown parameters. The population parameters here may include nuisance parameters. Historically, pivotal quantities have been used for the construction of test statistics for hypothesis testing of some of these unknown parameters. They have also been used for the construction of confidence intervals for some of these parameters.Generalized pivotal quantities (GPQ) were introduced by Tsui and Weerahandi (1989) and Weerahandi (1993). A GPQ is a function, not only of …
Day ‘N’ Nite: Habitability Of Tidally Locked Planets With Sporadic Rotation, Cody James Shakespeare
Day ‘N’ Nite: Habitability Of Tidally Locked Planets With Sporadic Rotation, Cody James Shakespeare
UNLV Theses, Dissertations, Professional Papers, and Capstones
Tidally locked worlds provide a unique opportunity for constraining the climates of detected exoplanets. They are unique in that few exoplanet spin and obliquity states are known or will be determined in the near future. The TRAPPIST-1 exoplanet system has multiple habitable zone planets that, in the past, have been presumed to be tidally locked. However, a recent study shows the dynamical conditions present in the TRAPPIST-1 system make rotation and large librations possible spin states for these planets. I confirm the tendency for these planets to sporadically transition from tidally locked libration to slow rotation using N-body simulations independent …
What Can General Chemistry Students Learn From External Representations Of Acid- Base Titrations?, Nicole Baldwin
What Can General Chemistry Students Learn From External Representations Of Acid- Base Titrations?, Nicole Baldwin
UNLV Theses, Dissertations, Professional Papers, and Capstones
Laboratory activities are a prevalent and essential part of chemistry learning because of their potential to help students develop problem solving abilities, visualize chemistry concepts learned in lecture, and gain practical skills. However, learning in the laboratory environment is not without its challenges. For example, cookbook-style chemistry laboratories can promote superficial learning, and cognitive overload can result from the study of new concepts and the use of new procedures in this environment. Multiple pedagogies and supports have been developed to address challenges such as these. The current research focuses upon external representations that are commonly used to support learning in …
The Metabolic Change Of Lipid Species In Stam Mice With Hepatocellular Carcinoma, Devin J. Peart
The Metabolic Change Of Lipid Species In Stam Mice With Hepatocellular Carcinoma, Devin J. Peart
UNLV Theses, Dissertations, Professional Papers, and Capstones
Primary liver cancer hepatocellular carcinoma (HCC) is the second leading cause of cancer death worldwide. In the US, primary liver cancer is the most rapidly increasing type of cancer due to increases in hepatitis B and C and the continued trend of greater and greater percentages of the population suffering from obesity, diabetes mellitus and metabolic syndrome. The prognosis for this disease is poor, with a 5-year survival rate of 26% as compared to only 2% when the cancer is metastatic. Unfortunately, current strategies for early detection of HCC, including routine CT imaging or alpha-fetoprotein biomarker, are suboptimal and tend …
Retrospective Varying Coefficient Association Analysis Of Longitudinal Binary Traits, Gang Xu
Retrospective Varying Coefficient Association Analysis Of Longitudinal Binary Traits, Gang Xu
UNLV Theses, Dissertations, Professional Papers, and Capstones
Many genetic studies contain rich information on longitudinal phenotypes that require powerful analytical tools for optimal analysis. Genetic analysis of longitudinal data that incorporates temporal variation is important for understanding the genetic architecture and biological variation of complex diseases. Most of the existing methods assume that the contribution of genetic variants is constant over time and fails to capture the dynamic pattern of disease progression. However, the relative influence of genetic variants on complex traits fluctuates over time.We developed several tests to fill the gap of analyzing time-varying genetic effects in longitudinal GWAS for binary traits. First, we propose a …
Use Of Healthcare Utilization Records For Analyzing Trends In Clinical Toxoplasmosis: A Comparison Of Nevada And The United States, Elijah Kreutzer
Use Of Healthcare Utilization Records For Analyzing Trends In Clinical Toxoplasmosis: A Comparison Of Nevada And The United States, Elijah Kreutzer
UNLV Theses, Dissertations, Professional Papers, and Capstones
Toxoplasmosis, a zoonotic disease caused by the parasitic protist Toxoplasma gondii, is a ubiquitous, global public health concern with a wide variety of clinical manifestations. Surveillance for the disease is lacking even in developed countries, and what surveillance is present most often focuses on pregnant women. This research investigated trends in clinical toxoplasmosis in Nevada and nationally to address the lack of knowledge concerning how Nevada discharges compare to national discharges in cases of toxoplasmosis. Specifically, this research sought to determine what characterizes toxoplasmosis in Nevada across inpatient, outpatient, and emergency department settings, as well as how these cases differ …
Quantifying The Effect Of Disturbance On Native Mojave Desert Shrubs, Tamara J. Wynne
Quantifying The Effect Of Disturbance On Native Mojave Desert Shrubs, Tamara J. Wynne
UNLV Theses, Dissertations, Professional Papers, and Capstones
Disturbance can come in many different forms. In our studies, we looked at the impact of a solar photovoltaic facility on native plants growing inside and outside of the facility, alteration in precipitation (simulated) on four native shrubs and the impact of applying supplemental water as a function of volume and frequency to establish native shrubs such as might occur at restoration sites. Disturbance is becoming a more common phenomenon in many ecosystems throughout the world, increasing the need for studies that quantify the impact at the plant and ecosystem level. Each research project revealed different plant responses, such as …
Identification Of Factors Contributing To Traffic Crashes By Analysis Of Text Narratives, Cristian D. Arteaga-Sanchez
Identification Of Factors Contributing To Traffic Crashes By Analysis Of Text Narratives, Cristian D. Arteaga-Sanchez
UNLV Theses, Dissertations, Professional Papers, and Capstones
The fatalities, injuries, and property damage that result from traffic crashes impose a significant burden on society. Current research and practice in traffic safety rely on analysis of quantitative data from crash reports to understand crash severity contributors and develop countermeasures. Despite advances from this effort, quantitative crash data suffers from drawbacks, such as the limited ability to capture all the information relevant to the crashes and the potential errors introduced during data collection. Crash narratives can help address these limitations, as they contain detailed descriptions of the context and sequence of events of the crash. However, the unstructured nature …
Jiapi: A Type Checker Generator For Statically Typed Languages, Benjamin Cisneros Merino
Jiapi: A Type Checker Generator For Statically Typed Languages, Benjamin Cisneros Merino
UNLV Theses, Dissertations, Professional Papers, and Capstones
Type systems are a key characteristic in the context of the study of programming languages. They frequently offer a simple, intuitive way of expressing and testing the fundamental structure of programs. This is especially true when types are used to provide formal, machine-checked documentation for an implementation. For example, the absence of type errors in code prior to execution is what type systems for static programming languages are designed to assure, and in the literature, type systems that satisfy this requirement are referred to as sound type systems. Types also define module interfaces, making them essential for achieving and maintaining …
Transient Sources And How To Study Them: Selected Topics In Multi-Messenger Astronomy, Jiawei Luo
Transient Sources And How To Study Them: Selected Topics In Multi-Messenger Astronomy, Jiawei Luo
UNLV Theses, Dissertations, Professional Papers, and Capstones
The discovery of cosmic neutrino flux by IceCube, and the multi-messenger observations of gravitational event GW170817 ushered in the era of multi-messenger astronomy. Since the Universe itself is a natural laboratory, multi-messenger astronomy can help us study the most extreme physics processes in great detail. In this dissertation, we touch on some of the currently unanswered questions involving different types of transient sources and different “messengers” of multi-messenger astronomy. We employ a variety of analysis methods, including machine learning, a method that has not yet been widely adopted in astronomy but is rapidly gaining momentum.We start this dissertation with Chapter …
Along Strike Tectonic Evolution Of The Neogene Bermejo Foreland Basin And Eastern Precordillera Thrust Front, Argentina (30-32ºs), Zoey Catherine Plonka
Along Strike Tectonic Evolution Of The Neogene Bermejo Foreland Basin And Eastern Precordillera Thrust Front, Argentina (30-32ºs), Zoey Catherine Plonka
UNLV Theses, Dissertations, Professional Papers, and Capstones
The Bermejo retroarc foreland basin system formed in flexural response to Miocene crustal thickening in the Andean orogenic system, specifically, the eastward propagation of the Precordillera fold-thrust belt and the basement-involved uplift of the Sierras Pampeanas. Previous work in the area has mainly focused on the mechanisms and expression of flat slab subduction and the structural geometry of the basement-involved Sierras Pampeanas and east-vergent Precordillera fold-thrust belt at depth. Much of this work has furthered the understanding of Bermejo basin evolution north of 31ºS, however debate still exists whether the N-S trending Bermejo basin evolved synchronously or asynchronously through time. …