Engineering Commons^™

Antiferromagnetism In The Van Der Waals Layered Spin-Lozenge Semiconductor Crte3, Michael Mcguire, V. Ovidiu Garlea, Santosh Kc, Valentino Cooper, Jiaqiang Yan, Huibo Cao, Brian Sales

Faculty Publications

The crystallographic, magnetic, and transport properties of the van der Waals bonded, layered compound CrTe3 have been investigated on single-crystal and polycrystalline materials. The crystal structure contains layers made up of lozenge-shaped Cr4 tetramers. Electrical resistivity measurements show the crystals to be semiconducting, with a temperature dependence consistent with a band gap of 0.3 eV. The magnetic susceptibility exhibits a broad maximum near 300 K characteristic of low dimensional magnetic systems. Weak anomalies are observed in the susceptibility and heat capacity near 55 K, and single-crystal neutron diffraction reveals the onset of long-range antiferromagnetic order at this temperature. Strongly dispersive …

How To Engage Students Both Inside And Outside The Classroom | College Of Engineering, Usu College Of Engineering

College of Engineering News

The S-STEM project team held a teaching seminar on April 4, 2017, for faculty and graduate students in the College of Engineering who are interested in how to engage students in active learning both inside and outside the classroom.

Hybrid-Impulsive Higher Order Sliding Mode Control In Reduced Information Environment, Fathi M. Aldukali

Research Horizons Day Posters

No abstract provided.

Development Of A Bio-Inspired, Low-Cost, Piezoelectric Airflow Sensor, Evan Unruh

Research Horizons Day Posters

No abstract provided.

Design And Development Of A High Altitude Wind Tunnel (Hat), David Ritchie

Research Horizons Day Posters

No abstract provided.

Microstrip Patch Antenna Design, Simulation, And Optimization At X-Band, Alfred Setyono, Beatrix Setyono, Victoria Eccles

Research Horizons Day Posters

No abstract provided.

Concept Study Of A Reusable Suborbital Launch Vehicle (Rslv), Jared Fuchs, Matthew Haskell, Benjamin Thompson, William Hankins

Research Horizons Day Posters

No abstract provided.

Investigation Of Copper Catalysts For Propylene Epoxidation, Hayden Fowler, Zheng Lu

Research Horizons Day Posters

No abstract provided.

Determining The Translational Velocity Of Flying Objects Using Ultrasonic Sensors, Alex Christley

Research Horizons Day Posters

No abstract provided.

Size Distribution Of Carbon Nanoparticles From A Methane/Argon Hv Pulsed Dc Ampj, Steven Doyle

Research Horizons Day Posters

No abstract provided.

Hyporheic Nitrate Uptake And Stoichiometric Limitations: Mesocosm Experiments Along A River Continuum., Vanessa A. Garayburu Caruso

Civil Engineering ETDs

Nutrient uptake in streams and rivers is controlled by complex transport dynamics and biogeochemical interactions, which together regulate nutrient export from watersheds. Decoupling the relative contributions of transport and biogeochemical processes to nutrient uptake at the watershed scale has been challenging due to the spatial and temporal heterogeneity of physicochemical properties. Furthermore, logistical constraints have resulted in solute-specific analyses, primarily concentrated in headwater streams, that disregard the role of stoichiometry in controlling biological uptake. We used experimental mesocosm (column experiments) along the Jemez River-Rio Grande continuum (1^st-8^th stream order) to isolate spatial differences in biological nitrate uptake. …

Characterization Of A Small Electro-Mechanical Contact Using Non-Conventional Measurement Techniques, Kelsey M. Johnson

Mechanical Engineering ETDs

Currently there are limitations in computing chatter behavior of small electrical contacts embedded in components using finite element models. Reduced order models (ROM) have been developed of such electrical contact sub-assemblies to assess the chatter behavior of the contacts during vibration and shock environments. The current ROM method requires experimental validation. This ROM also neglects the damping effects of the viscous fluid that typically surrounds such sub-assemblies. Dynamic ring-down testing of the electrical contacts in air was performed and will provide a validation data set for the current ROM. Additionally, dynamic ring-down testing of the electrical contact was performed in …

Experimental And Computational Investigations Of Heat Transfer Systems In Fluoride Salt-Cooled High-Temperature Reactors, Joel T. Hughes

Nuclear Engineering ETDs

Fluoride salt-cooled high-temperature reactors (FHRs) face a number of challenges similar to those faced by other Generation IV advanced reactor concepts. Predicting heat transfer in these systems accurately and reliably is one major challenge. Another is ensuring the safety of these systems during challenging operating conditions across the design basis envelope. Finally, achieving good economics to compete in a modern power generation portfolio is necessary for moving any nuclear power plant concept past the pre-conceptual stage. This dissertation attempts to support, from a thermal-hydraulics research standpoint, the case that the FHR can attain these goals. The dissertation focuses on several …

Turbulent Boundary Layer Features Via Lagrangian Coherent Structures, Proper Orthogonal Decomposition And Dynamic Mode Decomposition, Naseem Ali, Murat Tutkun, Raul Bayoan Cal

Mechanical and Materials Engineering Faculty Publications and Presentations

High-speed stereo PIV-measurements have been performed in a turbulent boundary layer at Reθ of 9800 in order to elucidate the coherent structures. Snapshot proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD) are used to visualize the flow structure depending on the turbulent kinetic energy and frequency content. The first six POD and DMD modes show the largest and the lowest amount of energy and frequency, respectively. Lagrangian coherent structure (LCS) based on the algorithm developed using the variational theory is also applied to track the flow via attracting and repelling trajectories. The shapes and the length of the trajectories …

Getting To Know The Data: Understanding Assumptions, Sensitivities, Uncertainty, And Being "Conservative" While Using Ite's Trip Generation Data In The Land Development Process, Kristina Marie Currans

PSU Transportation Seminars

Many agencies rely on trip generation estimates to evaluate the transportation impacts of land development in urban and suburban areas alike. Over the past decade, substantial attention has been paid to one national set of guidelines—the Institute of Transportation Engineers (ITE) Trip Generation Handbook (2014) and corresponding Manual (2012)—focusing in particular to improve the use of these data and supplementary methods for urban contexts.

The purpose of this study is to explore the typical data provided in the Handbook, within the context of these new improved state-of-the-art methods. As ITE’s describes, “an example of poor professional judgment is to rely …

The Effect Of Power Supply Ramp Time On Sram Puf's, Abdelrahman T. Elshafiey Mr.

Electrical and Computer Engineering ETDs

Physical unclonable functions (PUFs) are security primitives that exploit the device mismatches. PUFs are a promising solution for hardware cryptography and key storage. They are used in many security applications including identification, authentication and key generation. SRAM is one of the popular implementations of PUFs. SRAM PUFs offer the advantage, over other PUF constructions, of reusing resources (memories) that already exist in many designs.

In this thesis, for the first time, it is demonstrated that the start-up value of an SRAM PUF could be different depending on the SRAM power supply rising time. An analytical model has been developed to …

Characterization Of A Beam Position Monitor For Linear Accelerators, Artem Kuskov

Electrical and Computer Engineering ETDs

Los Alamos National Laboratory is one of the leaders in the development of accelerator based Mo-99 radioisotope production, a key diagnostic for medical applications. In order to increase the efficiency of Mo-99 yield, a non-interfering Beam Position Monitor (BPM) system was developed that measures the time-dependent centering of the Bremsstrahlung producing electron beam. The Beam Positioning Monitor is comprised of 4 capacitive pickups positioned at 90 degrees to each other housed in a conflat 4.5” (63.5 mm) flange. This thesis develops, from first principles, analytical solutions for the transfer curve of this diagnostic based. Additionally, finite element time and frequency …

Swosu Research And Scholarly Activity Fair 2017, Lisa Appeddu, Cj Smith

SWOSU Research and Scholarly Activity Fair Programs

Welcome to the Twenty-Fourth SWOSU Research and Scholarly Activity Fair! On display today are 158 poster presentations and 11 oral presentations, involving 314 student researchers, writers, presenters, and artists, and 47 faculty sponsors encompassing scholarly activity from the SWOSU Departments of Art, Communication, and Theatre; Biological Sciences; Business & Computer Science; Chemistry and Physics; Engineering Technology; Language & Literature; Music; Pharmaceutical Sciences; Psychology; and Social Sciences; and SWOSU School of Nursing and Allied Health Sciences. In addition, there are poster presentations from the Western Technology Center Biomedical Academy, Francis Tuttle Technology Center, El Reno Public Schools, and BlueSTEM AgriLearning …

Satellite Sequencing Optimization Using A Genetic Algorithm, Andrew Verstraete

Research and Creative Activities Poster Day

The problem of mission design for a robotic servicing satellite in geosynchronous Earth orbit (GEO) was investigated. A representative set of potential client satellites was selected, and operational needs were randomly assigned based on the average number of GEO retirements, anomalies, and repositioning maneuvers that currently occur each year. An objective function was developed to represent the value of servicing mission sequences, including client fees, time penalties, and operational risk. A genetic algorithm was then used to find sequences of operations on the potential client set that maximized the objective function’s value. Scenarios were analyzed with the database of satellites …

Computer Simulation Of Flexiblity And Inertial Effects On Self-Propelled Swimming Bodies, Ye Luo, Tai-Hsien Wu

Research and Creative Activities Poster Day

In this research, a numerical simulation method is employed to simulate a flapping movement for a flexible slender swimmer in a fluid. Our objective is to study dynamic behaviors of the flapping movement. Fig. 1 shows a sketch of the simulation: the leading edge of the swimming body is swung in the vertical direction to generate a horizontal thrust force, which drives the body itself to cruise in the horizontal direction in a fluid. The simulation is based on a combination of three numerical methods: the Lattice Boltzmann Method (LBM), Lattice Spring Model (LSM), and Immersed Boundary Method (IBM). The …

Evaluation Of The Effectiveness Of Clearview Font And Fluorescent Yellow Sheeting On Michigan’S Freeways, Lusanni Acosta Rodriguez

Research and Creative Activities Poster Day

Halation and irradiation make guide sign fonts hard to recognize. Drivers missing the needed information tend to be anxious and confused potentially causing fatal accidents. In order to avoid or mitigate the situation a newer font, Clearview, is installed to provide better readability in nighttime and from far distances. In a similar, context, the lack of brightness in sheeting material for warning signs leads to missing the cautionary information. Installation of fluorescent yellow sheeting provided signs with more noticeable and brighter materials. This study evaluates the effectiveness of the Clearview fonts along with fluorescent yellow sheeting installed in Michigan freeways. …

Analysis Of Emergency Medical Services Response Continuum For Motor Vehicle Crashes In Michigan, Megan Kuk

Research and Creative Activities Poster Day

Timely response of Emergency Medical Services (EMS) personnel at a crash site may help prevent loss of life and thereby impact the quality of life for an individual at risk. This study was conducted to review The Michigan Department of Community Health, Emergency Medical Services Section data collected over a 5-year period beginning in 2010. Specific intentions were to identify current EMS response, treatment, and transport trends.

A Statistical Model For Emergency Medical Services Response To Motor Vehicle Crashes In Michigan, Megan Kuk

Research and Creative Activities Poster Day

The response time is a crucial element of Emergency Medical Services (EMS). However, there are neither federal nor state (specifically Michigan) laws in place to regulate EMS response times, and standards are being set by individual vendors or local organizations. Investigation into response time performance measures may lead to further discoveries, innovations, and potentially identify best practices to improve existing systems used by EMS. Leading to quicker access to care for the end users (crash victims) and potentially saving numerous human lives.

Turbulence Analysis For The Improvement Of Internal Combustion Engine Efficiency, James R. Macdonald, Claudia Fajardo-Hansford

Research and Creative Activities Poster Day

Developing a complete understanding of the structure and behavior of the near-wall region (NWR) in reciprocating, internal combustion (IC) engines and of its interaction with the core flow is needed to support the implementation of advanced combustion and operating strategies to improve engine efficiency. The NWR in IC engines is fundamentally different from the canonical steady-state turbulent boundary layers (BL), which have been extensively researched. Motivated by this need, this poster presents results from the analysis of two-component velocity data measured with particle image velocimetry near the head of a single-cylinder, optical engine. The interaction between the NWR and the …

An Interactive Web-Based Tool For Fatigue Analysis And Life Prediction, Daniel Kujawski

Faculty Research and Creative Activities Award (FRACAA)

• Interactive web-based tool creates a modern approach to fatigue analysis and life prediction for use in engineering classrooms.
• Bridge the gap between theory and reality.
• The unique attributes of this software allows engineering students to learn and gain more insight to fatigue analysis in a given semester.

Usu Alumnus Makes Generous Contribution To College Of Engineering, Usu College Of Engineering

College of Engineering News

Utah State University alumnus Bhupesh Parikh is sharing a gift that will impact future engineering students for many years to come.

Dna Directed Assembly Of Gold-Tipped Metallic Single-Walled Carbon Nanotubes Into Electrical Devices, Ronald D. Salesky

Nanoscience and Microsystems ETDs

Carbon nanotubes have rightfully been regarded as a wonder material since their discovery by Iijima in 1991 and the subsequent elucidation of their many material properties. Their extreme strength is 10-fold higher than any industrial fiber. Their current density carrying capability is orders of magnitude higher than copper without failure from electromigration. Their high thermal conductivity bests diamond, and their structural versatility leads to either semiconducting or metallic electronic character. These properties all make the integration of carbon nanotubes into functional devices of high value. However, they remain a material of largely unrealized potential due to several challenges that arise …

The Mathematical Theory Of Deformation Arrest In Large-Strain Dynamic Plasticity, Brendan A. Kullback

Mechanical Engineering ETDs

Ductile structural components subjected to explosive loadings exhibit a large range of behaviors. The response of beams, walls, and blast doors is estimated using two methods. The engineering level approaches are highly simplified and neglect much of the relevant physics while the use of finite element or shock-code simulation is expensive and not suited to rapid problem solving and parameter studies. In this dissertation, a medium fidelity reduced order modeling approach has been derived to capture the most relevant physics governing rupture of ductile bodies dynamically deforming in tension.

Solution of the inertially stretching jet is used to reveal the …

Mechanical Engineering Students Win Big In Las Vegas | College Of Engineering, Usu College Of Engineering

College of Engineering News

Mechanical engineering students from Utah State University competed against 23 other teams and won 2^nd place overall in the 2017 Human Powered Vehicle Challenge.

Biological Engineering Students Showcase Research At Industry Meeting | College Of Engineering, Usu College Of Engineering

College of Engineering News

Biological engineering students from Utah State University helped welcome the world to Utah earlier this month at the Institute of Biological Engineering’s (IBE) annual meeting held in Salt Lake City.