Digital Commons Network^™

Science, Technology, Engineering, And Mathematics (Stem) Project-Based Learning (Pbl) Education: A New Mexico Case Study For Equity And Inclusion, Kimberly A. Scheerer

Teacher Education, Educational Leadership & Policy ETDs

This research addresses how student participation in Science, Technology, Engineering, and Mathematics (STEM) project-based learning (PBL) education activities encourages underrepresented minority student achievement in STEM career field trajectories. Seven New Mexico high school counselors and 12 STEM organization personnel were interviewed during this study. Their responses represent the nuanced professional voices where New Mexico public education intersects with STEM student interest and cultural influence.

For students, STEM PBL can foster deep integration across educational disciplines and enhance STEM career trajectory interest and readiness. STEM education converged with PBL methodologies has the ability to leverage community support while broadening student networks. …

Particle Image Velocimetry Methodology For Calculating The Advective Losses At The Solar Tower For The Gen 3 Concentrated Solar Power System, Guillermo Anaya

Mechanical Engineering ETDs

The Falling Particle Receiver (FPR) built by Sandia National Laboratory (SNL) at the National Solar Thermal Testing Facilities (NSTTF) is one of the latest concentrated energy harvesting systems for Concentrated Solar Power (CSP). The FPR system at the NSTTF uses solid particles as both the heat transfer fluid and storage media. This FPR operates by having a gravity-driven particles curtain being irradiated through an open cavity by CSP, provided by a heliostat field. However, during operation plumes of particles being expelled out of the receiver cavity can be observed, resulting in heat losses as well as particle inventory losses. The …

The Impact Of Murals On Traffic Safety: A Behavior And Crash Analysis, Maria Cecelia Cruz

Civil Engineering ETDs

ABSTRACT

This research analyzed changes in motor vehicle volumes and motor vehicle speeds after the installation of an intersection mural in Albuquerque, NM and changes in crash frequency after mural installations in Philadelphia, PA. Data was collected manually on site for the Albuquerque study and secondary data – including installation dates and physical characteristics – were used for the Philadelphia crash analyses. Statistics were computed to determine trends in motor vehicle speeds and volumes relative to the Albuquerque mural installation. A geographic information system (GIS) spatial analysis and t-test statistical analyses were used to determine which Philadelphia murals saw significant …

That's A Wrap: Using Cultural Discourse Analysis To Explicate The Film Portrayal Of Communication Between Elderly Parents And Their Adult Child(Ren) In A Caregiving Relationship, Gerri A. Duran

Communication ETDs

There are burgeoning numbers of elderly and a significant number of their adult children provide them with some level of care. To date, there has been little research on elderly parents’ perspective as they communicate with their adult children about the care provided by their children. This dissertation addresses this gap by identifying the nature of the communication, as portrayed in film, which occurs between an elderly parent (EP) and their caregiving adult child (AC).

In addition to identifying the nature of communication between an EP and their AC, I examine the similarities/differences of their communication among the films. I …

Evaluating Microneedle Impedance For Monitoring Water Potential In Vitis Vinifera And Helianthus Annuus, Erica Grace Pauer

Biology ETDs

Measurements of plant water potential provide fundamental insights into how plants are interacting with the environment to manage water needs. However, monitoring water potential is difficult, time consuming, and frequently destructive. Several methods have been in development that attempt to monitor the water status of plant tissues in a simple, continuous, and non-destructive manner. One of these methods, electrical impedance spectroscopy (EIS), is emerging as a particularly promising tool that has several applications in plant biology. I used a new microneedle system that applies small electrodes to a range of tissues. By utilizing this tool in conjunction with a standard …

Evolution Of Shock-Driven Multi-Phase Instability, Joshua Chavez

Mechanical Engineering ETDs

ABSTRACT

In many models and experiments using shock tubes and shock tube instabilities, measurements of velocity and position of the flow features are frequently taken in a single horizontal direction (or in one plane), however, the three-dimensional flow structure is important and cannot be fully resolved by such measurements. By placing a mirror at 45 degrees atop a test section of a shock tube, it becomes possible to visualize the flow from two directions simultaneously. The mirror is used to see if viable data can be gathered from the second view in conjunction with the main view. With high-speed video …

Statistical Methods For Differential Gene Expression Analysis Under The Case-Cohort Design, Lidong Wang

Mathematics & Statistics ETDs

Differential gene expression analysis has the potential to discover candidate biomarkers, therapeutic targets, and gene signatures. How to save money when using an unaffordable sample is a practical question. The case-cohort (CCH) study design can blend the economy of case-control studies with the advantages of cohort studies. But it has not been seen in the medical research literature where high-throughput genomic data were involved.

A score test does not need to fit the Cox PH model iteratively; hence, it can save computing time and avoid potential convergence issues. We developed a score test under the CCH design to identify DEGs …

Material Characterization And Comparison Of Sol-Gel Deposited And Rf Magnetron Deposited Lead Zirconate Titanate Thin Films, Katherine Lynne Miles

Mechanical Engineering ETDs

Lead zirconate titanate (PZT) has been a material of interest for sensor, actuator, and transducer applications in microelectromechanical systems (MEMS). This is due to their favorable piezoelectric, pyroelectric and ferroelectric properties. While various methods are available to deposit PZT thin films, radio frequency (RF) magnetron sputtering was selected to provide high quality PZT films with the added capability of batch processing. These sputter deposited PZT films were characterized to determine their internal film stress, Young’s modulus, composition, and structure. After characterization, the sputtered PZT samples were poled using corona poling and direct poling methods. As a means of comparison, commercially …

Alternative Positioning, Navigation And Timing, Md Sadman Siraj

Shared Knowledge Conference

Positioning, Navigation, and Timing (PNT) services are exploited by critical infrastructures which are strategic for the functioning of the modern society, such as telecom, energy, finance, and transportation. Though the most popular PNT services' provider is the Global Positioning System (GPS), its performance is often impacted by adverse conditions and different varieties of interference, either intentional or unintentional. The potential degradation of the Global Positioning System and other Global Navigation Satellite Systems under several circumstances gives rise to the development of alternative position navigation and timing (PNT) technologies aiming at maintaining efficient and safe operations. Exploiting the efficient and effective …

The Hidden Story Of Online Social Network Graphs, Aisha B Rahman

Shared Knowledge Conference

Nowadays it is very difficult to find a person that is not connected to any sort of online social network, especially after experiencing the terrifying impacts of the COVID-19 pandemic and being stuck at home, people became more dependent on social media to consolidate themselves. One of the COVID-19 pandemic's most lasting effects is an upsurge in social media usage. Online social networks make it easier to connect with others and find those who share common interests. But the dark sides of social networks are also out there. Catfishing is what my study focuses on. Catfishing is the practice of …

Model-Free Data-Driven Control For Nonlinear Systems, Aliakbar Ahmadikashani

Shared Knowledge Conference

A complex heating, ventilation, and air conditioning (HVAC) system is hard to model and identify. Due to the diversity of building applications and the coupling of dynamics of the equipment and the building, plant models have significant uncertainty. Black-box modeling of such system e.g. nonlinear autoregressive models, and neural network models can become ill-conditioned, and problematic for control input design. In this research we aim to perform prediction and control based on data for a general nonlinear system subject to constraints. We consider the discrete-time nonlinear state evolution x+ = f (x, u) of the system, where the output y …

Rational Design Of Silica-Based Nanoparticles For Overcoming Barriers Of Sirna Delivery In Relapsed Prostate Cancer Applications, Angelea Maestas-Olguin

Shared Knowledge Conference

The use of exogenous siRNA technology to modulate aberrant protein expression resulting from genetic mutations is a promising therapeutic approach for treatment of diseases such as prostate cancer (PC). The promise of siRNA-based therapeutics is dependent on the development of platforms that effectively protect siRNA from nuclease degradation and deliver the siRNA to the cytosol of target cells. The establishment of nanoparticle-based siRNA delivery platforms have been investigated to mitigate the cost and safety issues associated with viral delivery platforms. In this work, we present the development and characterization of a lipid coated mesoporous silica nanoparticle (LC-MSN) to address the …

Rechargeable Al-Co2 Battery Using A Homogeneous Catalyst, Christopher Fetrow

Shared Knowledge Conference

Metal-CO2 batteries have emerged as a promising strategy to improve energy storage technology while capturing/concentrating carbon dioxide. The Al-CO2 battery has been previously as a primary battery to have an excellent discharge capacity when a small amount of oxygen is introduced. Herein we demonstrate an Al-CO2 battery that uses a homogeneous iodine-based redox mediator to enable the reversible discharge and charge of the battery with an ultra-low overpotential of 0.05V. By replacing oxygen gas with aluminum iodide in the electrolyte of the previously primary-only configuration, the battery maintains a high discharge capacity and can be recharged for 12 cycles at …

An Examination Of Ingan Micro-Led Carrier Dynamics Through Small Signal Rf Analysis, Elizabeth Dejong

Shared Knowledge Conference

Light-emitting diodes (LEDs) are by far the most efficient and customizable light source commercially available. While large-area LEDs already have a wide range of uses and represent a massive decrease in energy costs and consumption compared to conventional light sources, applications such as directional lighting, digital displays, and visible light communication would benefit from a reduction in LED source size. Smaller light sources can achieve higher precision directionality, higher display resolution, and faster modulation. Micro-LEDs, usually defined as having a diameter of 50 μm or less, therefore have the potential to further reduce energy consumption and increase functionality. However, micro-LEDs …

Investigating Poly (1,2-Butylene Fumarate) Biopolymer For Applications In Bone Tissue Engineering, Jasmine Jackson

Shared Knowledge Conference

INTRODUCTION: Synthetic biopolymers allow for the creation of bone scaffolds which degrade and may be designed to encourage regeneration of new bone tissue. A common biopolymer for bone tissue engineering poly (propylene-fumarate)(PPF) has been found to have mechanical properties similar to that of native bone; however, former research has suggested its slow degradation rate can pose issues in bone tissue regeneration applications. This research introduces poly (1,2-butylene fumarate)(1,2-PBF) as a potential material for 3D bioprinting of bone tissue scaffolds. METHODS: 1,2-PBF synthesis is done via a polycondensation reaction of fumaryl chloride and 1,2-butanediol using a nitrogen sparging method in which …

Fabricating Silicon Nitride Microrings For Optical Frequency Comb Generation, Gabriel Colacion

Shared Knowledge Conference

Since their invention over two decades ago, optical frequency combs have enabled dramatic advances in the way we measure light and time. The utility of these devices follows from their characteristic output of broadband optical frequencies along with their well-timed pulsed output. Optical frequency combs are now used in a multitude of applications including microwave and optical frequency generation, synchronization between state-of-the-art atom-based clocks, as well as atomic and molecular spectroscopy. However, the complexity and scale of optical frequency combs generally limits them to specialized optics laboratories. In response, there has been a significant effort to leverage advances in nano- …

Strong Anti-Stokes Photoluminescence From Colloidal Ytterbium-Doped Yttrium Lithium Fluoride Nanoparticles, Shruti Gharde

Shared Knowledge Conference

We have successfully synthesized colloidal lithium yttrium fluoride (YLF) nanoparticles doped with ytterbium with the goal of investigating their anti-Stokes emission. The Yb content was varied between 1% and 10%. The nanoparticles emit in near-infrared, with the emission spectrum extending from 960 nm to 1060 nm when excited with the 900 nm light. Strong anti-Stokes photoluminescence was observed when using excitation wavelengths ranging from 1000 nm to 1020 nm.

Student Water Scholars And Broader Impact Outreach: Motivations And Hinderances To Participation, Sydney Donohue

Shared Knowledge Conference

Universities serve as a hub for the advancement of water science and engineering knowledge and innovations. However, much of that expertise does not reach communities that could benefit from such knowledge. Many universities and research centers attempt to address this by organizing broader impact outreach events. Anecdotally, we have seen that of a pool of approximately 100 water-focused students, only the same small subset participates in every event while over 70% of those invited never volunteer to participate. Therefore, there is a need to assess students' motivations and hindrances for volunteering. This study aims to survey undergraduate and graduate student …

Molten Salt Pump Bearing Design And Test, Yuqi Liu

Shared Knowledge Conference

Fluoride Salt Cooled High-Temperature Reactors (FHRs) use particle fuel, graphite moderator, and molten fluoride salt coolant for power generation and process heat applications. The main loop of the FHR is a closed loop, operating at slightly above atmospheric pressure, with fluoride salt temperatures exceeding 600 °C. Reliable high-temperature molten salt pumps are critical to the successful deployment of FHRs. To stabilize the rotating shaft and reduce the associated coefficient of friction, molten salt pumps require well-designed bearings. Therefore, it is necessary to study the detailed hydrodynamic performance of bearings under high-temperature molten salt conditions. In the current study, a computational …

Music Genre Classification By Convolutional Neural Networks, Usame Suud

Mathematics & Statistics ETDs

In today’s world, deep learning models are widely used in a variety of fields. Audio

applications include speech recognition, audio classification, and music information

retrieval. In this paper, we will focus on the classification of music genres using an

artificial neural network. The development of audio machine learning techniques has

created an independence from traditional, more time-consuming signal processing

techniques. Starting with raw audio data, we will gain an understanding of what

audio is and its digital representation. Then, the focus will be on obtaining frequency

information from audio signals through the use of spectrograms. Transforming the

spectrograms into the …

Simulation Of Supercritical Multiphase Flows Using Machine Learning, Nelson P. Longmire

Mechanical Engineering ETDs

In many technologies, such as rocket engines and modern power plants, the pressures of the fluids in these systems have increased to increase efficiency. As a result, the fluids are under pressures higher than the critical pressure meaning the fluids are supercritical. Supercritical fluids are unique as a liquid/gas phase equilibrium no longer exists, and a process called pseudo boiling occurs where the fluid properties have steep gradients, which lead to interesting fluid mechanics and heat transfer characteristics. Our understanding of supercritical fluids has had exciting advances over the years. However, there are still phenomena that are still not well …

Theory Of Hypersoft Sets: Axiomatic Properties, Aggregation Operations, Relations, Functions And Matrices, Muhammad Saeed, Atiqe Ur Rahman, Muhammad Ahsan, Florentin Smarandache

Neutrosophic Sets and Systems

No abstract provided.

Improved Definition Of Nonstandard Neutrosophic Logic And Introduction To Neutrosophic Hyperreals (Fifth Version, Florentin Smarandache

Neutrosophic Sets and Systems

No abstract provided.

Weighted Aggregation Operators Of Single-Valued Neutrosophic Linguistic Neutrosophic Sets And Their Decision-Making Method, Wen-Hua Cui, Jun Ye, Jing-Jing Xue, Ke-Li Hu

Neutrosophic Sets and Systems

No abstract provided.

Towards Intelligent Road Traffic Management Based On Neutrosophic Logic: A Brief Review, Asma Ait Ouallane, Said Broumi, Endalkachew Teshome Ayele, Assia Bakali, Ayoub Bahnasse, Mohamed Talea

Neutrosophic Sets and Systems

No abstract provided.

Sine Exponential Measure Of Single Valued Neutrosophic Sets In Medical Diagnosis, R. Narmadhagnanam, A. Edward Samue

Neutrosophic Sets and Systems

No abstract provided.

Single-Valued Pentapartitioned Neutrosophic Exponential Similarity Measure Under Svpns Environment And Its Application In The Selection Of Bacteria, Srila Dey, Rama Debbarma, Binod Chandra Tripathy, Suman Das, Priyanka Majumder

Neutrosophic Sets and Systems

No abstract provided.

An Application Of Pentagonal Neutrosophic Linear Programming For Stock Portfolio Optimization, Hamiden Abd El-Wahed Khalifa, Muhammad Saeed, Atiqe Ur Rahman, Salwa El-Morsy

Neutrosophic Sets and Systems

No abstract provided.

Similarity Measures For Interval-Valued Neutrosophic Hypersoft Set With Their Application To Solve Decision Making Problem, Rana Muhammad Zulqarnain, Aiyared Iampan, Hamiden Abd El-Wahed Khalifa, Imran Siddique

Neutrosophic Sets and Systems

No abstract provided.

Location Selection Of Low-Carbon Logistics Park Based On The Neutrosophic Numbers Multiple Attribute Decision Making, Xinrui Xu, Dexue Deng, Cun Wei

Neutrosophic Sets and Systems

No abstract provided.