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2024

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Articles 2221 - 2250 of 8366

Full-Text Articles in Physical Sciences and Mathematics

Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou), Draft Residential Metals Abatement Program Construction Completion Report (Non-Residential Parcels – Indoor Dust) – Kennedy Elementary (Dated April 17, 2024), Molly Roby Jul 2024

Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou), Draft Residential Metals Abatement Program Construction Completion Report (Non-Residential Parcels – Indoor Dust) – Kennedy Elementary (Dated April 17, 2024), Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

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Experimental Design For Scientific Discovery, Quan Minh Nguyen Jul 2024

Experimental Design For Scientific Discovery, Quan Minh Nguyen

McKelvey School of Engineering Theses & Dissertations

Experimental design offers an elegant model of many problems where one navigates within a vast search space seeking data points with certain characteristics. A multitude of applications in science and engineering fall under this umbrella, with drug and materials discovery being prime examples. The experimental design approach maintains a probabilistic model of the search space, and uses Bayesian decision theory accounting for this model to guide the accumulation of observed data to maximize an experimentation objective of interest. This dissertation explores Bayesian optimization and active search, two realizations of the experimental design framework that model discovery tasks. While existing solutions …

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Towards Environmentally Sustainable Preservation Of Heritage Buildings, Rozal Rozal Yousef Hanna1, Ayman Gamal El-Din Abd El- Tawab2, Walaa Abou El- Haggag Mehanna3 Jul 2024

Towards Environmentally Sustainable Preservation Of Heritage Buildings, Rozal Rozal Yousef Hanna1, Ayman Gamal El-Din Abd El- Tawab2, Walaa Abou El- Haggag Mehanna3

Journal of Engineering Research

The construction industry, characterized by its intricate processes and extensive stakeholder networks, stands at the cusp of a digital revolution. The adoption of blockchain-smart contract (BCSC) technology is at the heart of this transformation. This research delves deep into the BCSC within the construction arena to provide comprehensive insight into its probable applications, inherent challenges, and potential future trajectories. Leveraging the PRISMA analysis technique, a curated collection of relevant academic research articles was assembled, shedding light on the existing body of knowledge regarding the application of BCSC technology in construction. The authors developed an innovative user interface tool customized to …

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Review: Protection Of Wooden Structures With Nano-Titanium Dioxide Coating, Zienab Zienab A. Ahmed1*, And M. M. Mosallem2 Jul 2024

Review: Protection Of Wooden Structures With Nano-Titanium Dioxide Coating, Zienab Zienab A. Ahmed1*, And M. M. Mosallem2

Journal of Engineering Research

Wood is widely used for various purposes with good performance. Wood works as the main material for furniture, monuments, decorations and constructions. which has the close relationship with human. Durability of wood is important in ensuring an appropriate life for the structure being designed. Wooden construction deteriorates easily due to UV radiation and weather conditions. Many of wood types need a preservative treatment. Several compounds are available for chemical protection, but not all are completely safe for human health. New technologies with low environmental impact and economically feasible are developed, which improves the life cycle of wood. Titanium dioxide is …

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Urbanism Strategies For Linking Existing And New Cities, Naglaa J. Q. Mo’Men Abdel-Qader Ebrahim1, Mohsen Bayad2 Jul 2024

Urbanism Strategies For Linking Existing And New Cities, Naglaa J. Q. Mo’Men Abdel-Qader Ebrahim1, Mohsen Bayad2

Journal of Engineering Research

New cities, designed for urban growth outside existing metropolitan regions, face challenges in street infrastructure due to rapid expansion. Efficient control of mobility is crucial as cities grow. Sustainable transportation involves factors like infrastructure, public transit, delivery networks, affordability, efficiency, air quality, health, and reduced emissions. Commuting between established and new urban areas is common, leading to issues like urban sprawl, longer travel times, and congestion in developing countries. The challenge is to improve accessibility while addressing air quality, traffic, congestion, noise, built environment, emissions, and sprawl. This study aims to explore factors influencing mobility choices in Egypt, focusing on …

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Holomorphic Functional Calculus Approach To The Characteristic Function Of Quantum Observables, Andreas Boukas Jul 2024

Holomorphic Functional Calculus Approach To The Characteristic Function Of Quantum Observables, Andreas Boukas

Journal of Stochastic Analysis

No abstract provided.

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Multi-Case Study Of Left-Flank Boundaries Within Supercells, Peyton B. Stevenson Jul 2024

Multi-Case Study Of Left-Flank Boundaries Within Supercells, Peyton B. Stevenson

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

This study investigates the prevalence and significance of forward-flank convergence boundaries (FFCBs) and left-flank convergence boundaries (LFCBs) in shaping the structure and intensity of supercells, using observational data from various field projects. Unlike previous research focusing on individual cases, this study examines a diverse range of cases to provide comprehensive insights into the relationship between these boundaries and supercell characteristics such as intensity, longevity, and tornadogenesis. By analyzing high-resolution surface data, the research addresses the frequency, location, and intensity of these boundaries, and their impact on pseudo vertical vorticity, pseudo convergence, and density gradients. A total of 228 boundary identifications …

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Biostratigraphic Revision Of Esthonyx (Tillidontia, Mammalia) In The Contect Of Climate Change In The Lower Eocene Of The Bighorn Basin, Wyoming, John Colter Johnson Jul 2024

Biostratigraphic Revision Of Esthonyx (Tillidontia, Mammalia) In The Contect Of Climate Change In The Lower Eocene Of The Bighorn Basin, Wyoming, John Colter Johnson

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

Esthonyx is an early Eocene tillodont found in North America, Europe, and India. The genus was named by Edward Drinker (E. D.) Cope in 1874 based on specimens from the San Jose Formation in New Mexico. Since then, several species of Esthonyx have been described from North America alone. The best record of Esthonyx comes from the central Bighorn Basin (BHB) in Wyoming, where it appears in 220 localities in a 640 m-thick stratigraphic succession. Since the last summary of Esthonyx in the BHB, several hundred new specimens have been collected and curated at the Denver Museum of Nature and …

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Phylogeny And Disparity Of Ammonoid Family Acanthoceratidae Over Ocean Anoxic Event 2, Lindsey Howard Jul 2024

Phylogeny And Disparity Of Ammonoid Family Acanthoceratidae Over Ocean Anoxic Event 2, Lindsey Howard

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

The widespread use of genera as proxies for species in paleobiological studies might affect the results of these studies. Although most attention has been given to taxonomic diversity studies, this could also be true of disparity and phylogenetic studies. In particular, the assumption that particular character states truly diagnose all members of a genus might distort results. This study examines the disparity of Acanthoceratid ammonoids at both the generic and species level. 149 species from 42 genera were examined with 52 characters measured. Following the measurements, an inverse modeling simulation was run 100 times to generate a simulated phylogeny with …

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Design And Evaluation Of An Esa-Based Method Of Ensemble Subsetting For A Wofs (Warn On Forecast-Like System), Daniel J. Butler Jul 2024

Design And Evaluation Of An Esa-Based Method Of Ensemble Subsetting For A Wofs (Warn On Forecast-Like System), Daniel J. Butler

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

Forecasting severe thunderstorm environments in the southeastern United States can be challenging due to mesoscale heterogeneities such as shortwave troughs, pre-existing airmass boundaries, cold fronts aloft, low-level jets, dry air intrusions, and mesoscale lows. To combat these challenges, ensemble sensitivity analysis (ESA) may be applied to a Warn-on-Forecast (WOF)-like ensemble to improve forecasts of severe convection through ensemble weighting and subsetting. Ensemble-based weighting and subsetting uses ensemble members that most accurately represent the thunderstorm environment in areas of mesoscale heterogeneity. This study creates and evaluates the ensemble-based weighting and subsetting in four cases of severe thunderstorm occurrence. The open parameter …

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Eighth-Order Foldy-Wouthuysen Transformation, Ulrich D. Jentschura Jul 2024

Eighth-Order Foldy-Wouthuysen Transformation, Ulrich D. Jentschura

Physics Faculty Research & Creative Works

The calculation of higher-order binding corrections to bound systems is a fundamental problem of theoretical physics. For any nonrelativistic expansion, one needs the Foldy-Wouthuysen transformation, which disentangles the particle and the antiparticle degrees of freedom. This transformation is carried out here to eighth order in the momenta or to eighth order in the momentum operators, which is equivalent to the eighth order of the fine-structure constant. Matrix elements of the eighth-order terms are evaluated for F5/2 and F7/2 states in hydrogenlike ions and compared with the Dirac-Coulomb energy levels.

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Tunneling Dynamics Of 164dy Supersolids And Droplets, S. I. Mistakidis, K. Mukherjee, S. M. Reimann, H. R. Sadeghpour Jul 2024

Tunneling Dynamics Of 164dy Supersolids And Droplets, S. I. Mistakidis, K. Mukherjee, S. M. Reimann, H. R. Sadeghpour

Physics Faculty Research & Creative Works

The tunneling dynamics of a magnetic Dy164 quantum gas in an elongated or pancake skewed double-well trap is investigated with a time-dependent extended Gross-Pitaevskii approach. Upon lifting the energy offset, different tunneling regimes can be identified. In the elongated trap and for sufficiently large offset, the different configurations exhibit collective macroscopic tunneling. For smaller offset, partial reflection from and transmission through the barrier lead to density accumulation in both wells, and eventually to tunneling locking. One can also reach the macroscopic self-trapping regime for increasing relative dipolar interaction strength, while tunneling vanishes for large barrier heights. A richer dynamical behavior …

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Magnetic Properties Of Diluted Hexaferrites, Logan Sowadski, Sean Anderson, Cameron Lerch, Julia E. Medvedeva, Thomas Vojta Jul 2024

Magnetic Properties Of Diluted Hexaferrites, Logan Sowadski, Sean Anderson, Cameron Lerch, Julia E. Medvedeva, Thomas Vojta

Physics Faculty Research & Creative Works

We revisit the magnetic properties of the hexagonal ferrite PbFe12-xGaxO19. Recent experiments have reported puzzling dependences of the ordering temperature and the saturation magnetization on the Ga concentration x. To explain these observations, we perform large-scale Monte Carlo simulations, focusing on the effects of an unequal distribution of the Ga impurities over the five distinct Fe sublattices. Ab initio density-functional calculations predict that the Ga ions preferably occupy the 12k sublattice and (to a lesser extent) the 2a sublattice. We incorporate this insight into a nonuniform model of the Ga distribution. Monte Carlo simulations …

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Integrity Roofing Nw Sustainability Officer, Sam Woodman Jul 2024

Integrity Roofing Nw Sustainability Officer, Sam Woodman

College of the Environment Internship Reports

My internship as the Sustainability Officer at Integrity Roofing NW has been an invaluable learning experience that has enhanced my understanding of sustainable roofing practices and provided me with practical skills and insights into the roofing industry. Over the past few months, I focused on several key objectives, including mastering the ins and outs of sustainable roofing, identifying and promoting cost-effective and environmentally friendly materials, understanding the economic and environmental benefits of sustainable practices, and applying knowledge from my Environmental Science (ENVS) and Economics (ECON) classes to real-world scenarios. Additionally, I sought to develop my proficiency in Excel and gain …

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Deception Pass State Park Intern, Chloe Lindstrom Jul 2024

Deception Pass State Park Intern, Chloe Lindstrom

College of the Environment Internship Reports

Most of my background science work and most of what guided me towards Environmental Science was marine science and marine biology. I have an abundance of experience collecting oceanography data, and working in aquatic environments, but one of my learning goals was to branch out and away from marine science. Not only is it a popular destination for guests hoping to go outside and enjoy nature, but Deception Pass is also home to much wildlife. I regularly encountered chipmunks, bunnies, squirrels, bald eagles, red-tail hawks, deer, orcas, and other birds and mammals during my internship. All these organisms rely on …

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Wwu Iws Internship, Andrew Aguilar Jul 2024

Wwu Iws Internship, Andrew Aguilar

College of the Environment Internship Reports

For my internship I worked as a research assistant at the Institute for Watershed Studies (IWS). IWS is a research institute affiliated with the College of the Environment at Western Washington University (WWU) that conducts research on freshwater lakes, streams, and wetlands. The main project that IWS works on is the Lake Whatcom Monitoring Project. This project has been monitoring Lake Whatcom since 1988 with the goal of providing a long-term record of data on a variety of water quality parameters. The monitoring program was initiated because Lake Whatcom is the primary drinking water source for the City of Bellingham …

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Washington Conservation Corps Crew Member, Eric Newell Jul 2024

Washington Conservation Corps Crew Member, Eric Newell

College of the Environment Internship Reports

During my time at WCC, I have learned about state government structure and have gotten a closer look at how it works from the inside. Previously I associated DNR with wildland 1 firefighting, which is one of the things they do, but now I understand that DNR has many, many divisions and a very complicated structure. The department is made up of fire experts, geologists, recreation managers, foresters, mappers, conservation experts, and much more. DNR has six regions and each of them operates largely separated from the others. This is advantageous because rules and regulations can be specific to a …

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Birch Bay State Park Intern, Kylee Wright Jul 2024

Birch Bay State Park Intern, Kylee Wright

College of the Environment Internship Reports

This past summer I worked at Birch Bay State Park in Birch Bay, Washington as a park aide. I spent the summer working with Park Rangers to keep this protected piece of land along the Strait of Georgia a space where people and nature can mingle. I wanted to work here because it seemed like the perfect way to start down the path towards working in the outdoors in a context where I am doing what I can to keep natural spaces wild and protected, while also making it possible for people to see them in all their splendor so …

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Pacmam Intern, Natalia Debardeleben Jul 2024

Pacmam Intern, Natalia Debardeleben

College of the Environment Internship Reports

For my Summer internship, I assisted PacMam (Pacific Mammal Research) in Anacortes, WA and remotely. PacMam is a 501c3 non-profit organization that is dedicated to better understanding more about marine mammal populations in the Salish Sea. During my time interning for PacMam, the main marine mammals that they were focusing on were harbor seals and porpoises. The work that I conducted for PacMam was primarily in assisting with harbor seal identifications where I identified new seals, even naming a few, but also reidentified seals that had already been confirmed and added to the Seal Codex. With harbor seal research, there …

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Wwu Marine Chemistry Lab And Field Assistant, Elsa (Christopher Adam) Lindenmeyr Jul 2024

Wwu Marine Chemistry Lab And Field Assistant, Elsa (Christopher Adam) Lindenmeyr

College of the Environment Internship Reports

During this internship, I gained both laboratory and field experience through numerous things. I first learned how to assemble mold for the gels that would be used for the experiment. This was done by sandwiching a rubber tube and spacers between two pieces of glass and then pouring the liquid gels with a pipette. The pouring of the gels took preciseness to pour quickly enough that it doesn’t set half-way through and create stripes, and not pour so quickly that you get bubbles. I learned to make agarose and acrylamide solutions and how long and the conditions they need to …

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Washington Conservation Corps Crew Member, Naomi A. Ellis Jul 2024

Washington Conservation Corps Crew Member, Naomi A. Ellis

College of the Environment Internship Reports

One of my primary objectives going into this summer was to gain a more comprehensive understanding of the realities of physical labor, an essential aspect of applied science in the field, especially in conservation work. Although I have always enjoyed working with my hands and challenging myself with outdoor activities, my professional experience in this area was limited. The job met this objective right away, starting with a backcountry overnight trip, or spike. Our task involved camping out for four days while assisting in a grid search through a conserved natural area for lost DNR materials. It was important to …

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Ahtna Intertribal Resource Commission Intern, Luke Joi Duvall Jul 2024

Ahtna Intertribal Resource Commission Intern, Luke Joi Duvall

College of the Environment Internship Reports

This summer, I spent ten weeks working as a fisheries technician for the Ahtna Intertribal Resource Commission. My primary position duties involved taking genetic and health samples for sockeye and chinook salmon. Throughout this summer I developed knowledge in the anatomy, ecology, management, and sampling techniques associated with salmon along with gaining insight and experience in other fields while collaborating with organizations outside my own. Furthermore, I gained valuable insight into the multiple organizations and attitudes involved in the management of natural resources throughout Alaska. Coming out of this experience, I feel prepared to progress further into research and conservation …

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Community Boating Center Bioluminescence Intern, Eddie Joi Nosal Jul 2024

Community Boating Center Bioluminescence Intern, Eddie Joi Nosal

College of the Environment Internship Reports

2024 is the third year of the bioluminescence internship position at the Community Boating Center. In the last two years, the Community Boating Center has partnered with Western Washington University to assist in research on bioluminescence and education through guided night kayak tours. Previous research was done by now-WWU alumni Lucy Greeley and Carrley Smith with the goal of identifying bioluminescent dinoflagellate species, planktonic community composition during bioluminescent events, and the effects of environmental factors on brightness of dinoflagellates. The work done by previous interns has gained recognition from the Bellingham Herald, presented at conferences, and has had a video …

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Shannon Point Marine Center Research Intern, Sam Joi Clement Jul 2024

Shannon Point Marine Center Research Intern, Sam Joi Clement

College of the Environment Internship Reports

For the past two quarters, I have worked with Professor Morgan Eisenlord on two experiments involving eelgrass wasting disease. In both experiments, samples were collected from Padilla Bay. One, which dates back to the Summer of 2023, analyzes how the protist Labyrinthula zostera (which causes eelgrass wasting disease) presents itself in eelgrass when compared to algae. Another, primarily worked on by two students at the Shannon Point Marine Center during the Summer of 2024, analyzed differences in eelgrass wasting disease between two different species of eelgrass in Padilla Bay: Zostera marina and Zostera Japonica.

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Whatcom Humane Society Wildlife Rehab Intern, Bella Joi Moore Jul 2024

Whatcom Humane Society Wildlife Rehab Intern, Bella Joi Moore

College of the Environment Internship Reports

For my internship through Western, I decided to go with Whatcom’s Humane Socierty’s Wildlife rehabilitation center. This particular place is part of Whatcom’s few different centers for animals but this one in particular deals with wildlife animals and sometimes (temporarily) marine mammals. I’ve always known I wanted to work with animals so this experience was one in a million. It was very hands on and right in the middle of the field which was very cool.

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Roni Lifeworks Intern, Anthony Ortiz Jul 2024

Roni Lifeworks Intern, Anthony Ortiz

College of the Environment Internship Reports

During this internship, I was under the guidance of Dr. Jocelyn Enabulele (Roni Lifeworks) and Seth Schromen-Wawrin (Seattle Department of Health). I am deeply passionate about environmental science, and I have always been intrigued by the relationship between humans and the natural environment, therefore this internship was naturally appealing and likely contributed to my ability to secure such an awe-inspiring opportunity to play a significant role in this research project. It has offered me the unique opportunity to dive into and apply some of the knowledge and critical thinking skills I have attained directly in the field. Participating in this …

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Wild Bird Wildlife Rehab Intern, Maggy Herman Jul 2024

Wild Bird Wildlife Rehab Intern, Maggy Herman

College of the Environment Internship Reports

During my internship at Barnswallow, I worked three days a week and was responsible for a variety of tasks each day. Every week followed a similar schedule such as one day a week being reserved for cleaning and another for preparing food, among other tasks. My main objective was to support the rehabilitation center by completing assigned tasks ensuring that the center ran smoothly. Overall, my role as an intern was to help maintain a good quality of life for all residents at Barnswallow.

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Landmark Environmental Intern, Meredith Czoschke Jul 2024

Landmark Environmental Intern, Meredith Czoschke

College of the Environment Internship Reports

Landmark Environmental specializes in assessing and remediating chemically contaminated sites, often involving construction or redevelopment projects. Their work is divided into several key aspects: Phase I Environmental Site Assessments (ESAs), Phase II ESAs, and additional remediation activities. This report aims to provide a detailed account of my responsibilities, the skills I acquired, and how these align with my academic background and career goals.

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Deception Pass State Park Beach Naturalist Intern, Mikaela Silva Jul 2024

Deception Pass State Park Beach Naturalist Intern, Mikaela Silva

College of the Environment Internship Reports

Deception Pass State Park in Oak Harbor, Washington, spans over 4,000 acres on two islands – Fidalgo to the north and Whidbey to the south (Deception Pass State Park, 2024). Originally, in 1866 the land around the pass was set aside to be a military reservation by the United States government (Deception Pass State Park, 2024). In 1922 the property was then designated by a Congressional Act for public recreation, creating Deception Pass State Park (Deception Pass State Park, 2024). The bridge that connects the two islands is a major tourist attraction along with the rugged cliffs, old-growth forest, historical …

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Silfab Solar Processing Intern, Abigail A. Marshall Jul 2024

Silfab Solar Processing Intern, Abigail A. Marshall

College of the Environment Internship Reports

The knowledge I gained about Lean manufacturing concepts also deepened my understanding of manufacturing and sustainability. A large part of Lean manufacturing includes a focus on reducing different types of waste. These wastes include transportation, excess production, excess inventory, defects, time, human talent, motion, and unneeded processing. Although the focus of Lean manufacturing is on maximizing production efficiency and improving customer value, many of these wastes are also deeply related to environmental sustainability. Unnecessary transportation, production, processing and materials are all direct contributors to carbon emissions. In this way, Lean manufacturing can be another valuable tool for both increasing profit …

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