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Articles 1 - 30 of 155
Full-Text Articles in Physics
Investigation Of An Unusual Thin Layer Descending Through The Upper Stratosphere, Houston D. Bentley
Investigation Of An Unusual Thin Layer Descending Through The Upper Stratosphere, Houston D. Bentley
Physics Capstone Projects
Lidar observations on the night of 19-20 February 2004 at Logan, Utah (41.74 N, 111.81 W) revealed a strange thin layer which descended from roughly 55 km to 30 km over seven hours. Approximations are made for the dimensions and descent rate of the layer. Although the particle radius and density are unknown, a range can be determined from the descent rate and reference to the sizes of known particles. Several possible sources for the layer are explored, concluding that an object entering the Earth’s atmosphere was the most probable cause.
Impact Of Bubble Baths On Stainless Steel Sphere Water Entry, Wesley Robinson
Impact Of Bubble Baths On Stainless Steel Sphere Water Entry, Wesley Robinson
Physics Capstone Projects
Soap Bubbles on the water surface would seem to be an intuitive means for splash suppression, but their presence appears to be a double edged sword. We present on the water entry of hydrophilic spheres where the liquid surface is augmented by the presence of a bubble layer, similar to a bubble bath. While the presence of a bubble layer can diminish splashing upon impact at low Weber numbers, it also induces cavity formation at speeds below the critical velocity. The formation of a cavity generally results in larger Worthington jets and thus, larger amounts of ejected liquid. Bubble layers …
Mathematica Program To Compute Klein Gordon Equation For Generic Black Holes, Brant Smith
Mathematica Program To Compute Klein Gordon Equation For Generic Black Holes, Brant Smith
Physics Capstone Projects
The goal of this project is to develop a program that will compute the Klein Gordon equation for generic Black Holes through the program Mathematica. This program will be available on Utah State websites for public usage. This project focuses on an understanding of General Relativity and more concretely on theoretical aspects of Black Holes. Developing the program begins with computing the Laplace equation in flat space to understand what it means to have empty space without a Black Hole. The Klein Gordon equation for a Schwarzschild Black Hole is then solved to show what happens once a static, non-rotating …
Rectifying Garbage-In Equals Garbage-Out Using A Secondary Electron Yield Materials Database, Phil Lundgreen, Jr Dennison
Rectifying Garbage-In Equals Garbage-Out Using A Secondary Electron Yield Materials Database, Phil Lundgreen, Jr Dennison
Presentations
No abstract provided.
An Introduction To Quantile-Quantile Plots For The Experimental Physicist, Allen Andersen, Jr Dennison
An Introduction To Quantile-Quantile Plots For The Experimental Physicist, Allen Andersen, Jr Dennison
Journal Articles
No abstract provided.
Entry Of A Sphere Into A Water-Surfactant Mixture And The Effect Of A Bubble Layer, Nathan B. Spiers, Mohammad M. Mansoor, Randy Craig Hurd, Saberul I. Sharker, W. G. Robinson, B. J. Williams, Tadd T. Truscott
Entry Of A Sphere Into A Water-Surfactant Mixture And The Effect Of A Bubble Layer, Nathan B. Spiers, Mohammad M. Mansoor, Randy Craig Hurd, Saberul I. Sharker, W. G. Robinson, B. J. Williams, Tadd T. Truscott
Mechanical and Aerospace Engineering Faculty Publications
A rigid sphere entering a liquid bath does not always produce an entrained air cavity. Previous experimental work shows that cavity formation, or the lack thereof, is governed by fluid properties, wetting properties of the sphere, and impact velocity. In this study, wetting steel spheres are dropped into a water-surfactant mixture with and without passing through a bubble layer first. Surprisingly, in the case of a water-surfactant mixture without a bubble layer, the critical velocity for cavity formation becomes radius dependent. This occurs due to dynamic surface tension effects, with the local surface tension in the splash increasing during surface …
Fluted Films, Nathan B. Spiers, Mohammad M. Mansoor, Jesse Belden, Randy Craig Hurd, Zhao Pan, Tadd T. Truscott
Fluted Films, Nathan B. Spiers, Mohammad M. Mansoor, Jesse Belden, Randy Craig Hurd, Zhao Pan, Tadd T. Truscott
Mechanical and Aerospace Engineering Faculty Publications
This paper is associated with a poster winner of a 2017 APS/DFD Milton van Dyke Award for work presented at the DFD Gallery of Fluid Motion. The original poster is available from the Gallery of Fluid Motion, https://doi.org/10.1103/APS.DFD.2017.GFM.P0030
Real-Time Video Processing Of Arcing Events To Determine Coincidence, Jr Dennison, Gregory Wilson, Jonh Mojica Decena, Brian Wood
Real-Time Video Processing Of Arcing Events To Determine Coincidence, Jr Dennison, Gregory Wilson, Jonh Mojica Decena, Brian Wood
Posters
No abstract provided.
An Analysis Of Variations In Published Secondary Electron Yield Measurements Of Copper, Phil Lundgreen, Jr Dennison
An Analysis Of Variations In Published Secondary Electron Yield Measurements Of Copper, Phil Lundgreen, Jr Dennison
Posters
No abstract provided.
An Analysis Of Variations In Published Secondary Electron Yield Measurements Of Copper, Phil Lundgreen, Jr Dennison
An Analysis Of Variations In Published Secondary Electron Yield Measurements Of Copper, Phil Lundgreen, Jr Dennison
Posters
No abstract provided.
Effects Of Radiation On The Electrostatic Discharge Of Polymers, Kip Quilter, Megan Loveland, Alexandra Hughlett, Jr Dennison
Effects Of Radiation On The Electrostatic Discharge Of Polymers, Kip Quilter, Megan Loveland, Alexandra Hughlett, Jr Dennison
Posters
No abstract provided.
Real-Time Video Processing Of Arcing Events To Determine Coincidence, Jr Dennison, Gregory Wilson, Jonh Mojica Decena, Brian Wood
Real-Time Video Processing Of Arcing Events To Determine Coincidence, Jr Dennison, Gregory Wilson, Jonh Mojica Decena, Brian Wood
Posters
A system has been developed and tested for real-time monitoring of environmentally-induced electrostatic discharge events to test spacecraft component and material survivability. Simultaneous detection by several parallel methods in coincidence, enhances event detection, minimizes false signals, and collects complementary information to determine arc location, intensity, and timing. This research focuses on four computer-interfaced video cameras which provide spatial and temporal detection of visual arcing from the surface of various elements. A real time processing solution was developed which can calculate integrated intensities, sensitively detect intensity threshold events, and store relevant video frames from these threshold events. Post processing of this …
Electron Yield Measurements Of Multilayer Conductive Materials, Gregory Wilson, Matthew Robertson, Jordan Lee, Jr Dennison
Electron Yield Measurements Of Multilayer Conductive Materials, Gregory Wilson, Matthew Robertson, Jordan Lee, Jr Dennison
Presentations
No abstract provided.
Charging Effects Of High Voltage Probe Pulse On Pulsed Electroacoustic Measurements, Zachary Gibson, Jr Dennison, Erick W. Griffiths, Lee Pearson, Anthony Pearson
Charging Effects Of High Voltage Probe Pulse On Pulsed Electroacoustic Measurements, Zachary Gibson, Jr Dennison, Erick W. Griffiths, Lee Pearson, Anthony Pearson
Presentations
No abstract provided.
Detection And Classification Of High Energy Beta Radiation Induced Damage Of Raspberry Pi Zero Intended For Opal Cubesat, Jonh Mojica Decena, Jr Dennison, Brian Wood, Ryan J. Martineau, Michael Taylor
Detection And Classification Of High Energy Beta Radiation Induced Damage Of Raspberry Pi Zero Intended For Opal Cubesat, Jonh Mojica Decena, Jr Dennison, Brian Wood, Ryan J. Martineau, Michael Taylor
Presentations
No abstract provided.
Electron Yield Of A Carbon-Composite Nanodielectric, Jr Dennison, Matthew Robertson, Gregory Wilson, Justin Christensen
Electron Yield Of A Carbon-Composite Nanodielectric, Jr Dennison, Matthew Robertson, Gregory Wilson, Justin Christensen
Presentations
No abstract provided.
Simulating Microgravity And Space Radiation With A Rotary Cell Culture System (Rccs), Alexandra Nelson, Lori Caldwell, Eryn Hanson, Jr Dennison, Elizabeth Vargis
Simulating Microgravity And Space Radiation With A Rotary Cell Culture System (Rccs), Alexandra Nelson, Lori Caldwell, Eryn Hanson, Jr Dennison, Elizabeth Vargis
Presentations
No abstract provided.
Characterizing Vibrationally Induced Damage Of Carbon Nanotube Forests, Jordan Lee, Brian Wood, Ashlan Keeler, Jr Dennison, T. -C. Shen
Characterizing Vibrationally Induced Damage Of Carbon Nanotube Forests, Jordan Lee, Brian Wood, Ashlan Keeler, Jr Dennison, T. -C. Shen
Presentations
No abstract provided.
Detection And Classification Of High Energy Beta Radiation Induced Damage Of Raspberry Pi Zero Intended For Opal Cubesat, Jonh Mojica Decena, Ryan J. Martineau, Jr Dennison, Brian Wood, Michael J. Taylor
Detection And Classification Of High Energy Beta Radiation Induced Damage Of Raspberry Pi Zero Intended For Opal Cubesat, Jonh Mojica Decena, Ryan J. Martineau, Jr Dennison, Brian Wood, Michael J. Taylor
Presentations
No abstract provided.
Simulating Microgravity And Space Radiation With A Rotary Cell Culture System (Rccs), Alexandra Nelson, Lori Caldwell, Eryn Hanson, Jr Dennison, Elizabeth Vargis
Simulating Microgravity And Space Radiation With A Rotary Cell Culture System (Rccs), Alexandra Nelson, Lori Caldwell, Eryn Hanson, Jr Dennison, Elizabeth Vargis
Presentations
No abstract provided.
Charging Effects Of High Voltage Probe Pulse On Pulsed Electroacoustic Measurements, Zachary Gibson, Jr Dennison, Lee Pearson, Erick Griffiths, Anthony Pearson
Charging Effects Of High Voltage Probe Pulse On Pulsed Electroacoustic Measurements, Zachary Gibson, Jr Dennison, Lee Pearson, Erick Griffiths, Anthony Pearson
Presentations
No abstract provided.
Electron Yield Of Carbon-Composite Nanodielectric, Matthew Robertson, Justin Christensen, Gregory Wilson, Jr Dennison
Electron Yield Of Carbon-Composite Nanodielectric, Matthew Robertson, Justin Christensen, Gregory Wilson, Jr Dennison
Presentations
No abstract provided.
Characterization Of Electron Yield Suppression With Carbon Nanotube Forest Grown On Silicon Substrates, Brian Wood, Jordan Lee, Justin Christensen, Gregory Wilson, Jr Dennison, T. -C. Shen
Characterization Of Electron Yield Suppression With Carbon Nanotube Forest Grown On Silicon Substrates, Brian Wood, Jordan Lee, Justin Christensen, Gregory Wilson, Jr Dennison, T. -C. Shen
Presentations
No abstract provided.
Characterization Of Electron Yield Suppression With Carbon Nanotube Forest Grown On Silicon Substrates, Brian Wood, Jordan Lee, Gregory Wilson, Jr Dennison, T. -C. Shen
Characterization Of Electron Yield Suppression With Carbon Nanotube Forest Grown On Silicon Substrates, Brian Wood, Jordan Lee, Gregory Wilson, Jr Dennison, T. -C. Shen
Presentations
No abstract provided.
Optical Transmission Of Irradiated Optical Filters, Ashlan Keeler, Jr Dennison, Brian Wood, Jonh Mojica Decena
Optical Transmission Of Irradiated Optical Filters, Ashlan Keeler, Jr Dennison, Brian Wood, Jonh Mojica Decena
Presentations
No abstract provided.
Characterizing Vibrationally Induced Damage Of Carbon Nanotube Forests, Jordan Lee, Brian Wood, Ashlan Keeler, Jr Dennison, T. -C. Shen
Characterizing Vibrationally Induced Damage Of Carbon Nanotube Forests, Jordan Lee, Brian Wood, Ashlan Keeler, Jr Dennison, T. -C. Shen
Presentations
No abstract provided.
Real-Time Video Processing Of Arcing Events To Determine Coincidence, Jr Dennison, Gregory Wilson, Jonh Mojica Decena, Brian Wood
Real-Time Video Processing Of Arcing Events To Determine Coincidence, Jr Dennison, Gregory Wilson, Jonh Mojica Decena, Brian Wood
Presentations
No abstract provided.
Optical Transmission Of Irradiated Optical Filters, Jr Dennison, Ashlan Keeler, Brian Wood, Jonh Mojica Decena
Optical Transmission Of Irradiated Optical Filters, Jr Dennison, Ashlan Keeler, Brian Wood, Jonh Mojica Decena
Presentations
No abstract provided.
Electron Yield Measurements Of Multilayer Conductive Materials, Gregory Wilson, Matthew Robertson, Jordan Lee, Jr Dennison
Electron Yield Measurements Of Multilayer Conductive Materials, Gregory Wilson, Matthew Robertson, Jordan Lee, Jr Dennison
Presentations
No abstract provided.
Validation Of Ionospheric Specifications During Geomagnetic Storms: Tec And Fof2 During The 2013 March Storm Event, Jasoon S. Shim, Ioanna Tsagouri, Larisa Goncharenko, Lutz Rastaetter, Maria Kuznetsova, Dieter Bilitza, M. Codrescu, A. J. Coster, Stanley C. Solomon, M. Fedrizzi, Matthias Förster, Timothy J. Fuller-Rowell, Larry Gardner, Joseph Huba, A. A. Namgaladze, Boris E. Prokhorov, Aaron J. Ridley, Ludger Scherliess, Robert W. Schunk, Jan Josef Sojka, Lie Zhu
Validation Of Ionospheric Specifications During Geomagnetic Storms: Tec And Fof2 During The 2013 March Storm Event, Jasoon S. Shim, Ioanna Tsagouri, Larisa Goncharenko, Lutz Rastaetter, Maria Kuznetsova, Dieter Bilitza, M. Codrescu, A. J. Coster, Stanley C. Solomon, M. Fedrizzi, Matthias Förster, Timothy J. Fuller-Rowell, Larry Gardner, Joseph Huba, A. A. Namgaladze, Boris E. Prokhorov, Aaron J. Ridley, Ludger Scherliess, Robert W. Schunk, Jan Josef Sojka, Lie Zhu
All Physics Faculty Publications
To address challenges of assessing space weather modeling capabilities, the CommunityCoordinated Modeling Center is leading a newly establishedInternational Forum for Space WeatherModeling Capabilities Assessment. This paper presents preliminary results of validation of modeled foF2 (F2 layer critical frequency) and TEC (total electron content) during the first selected 2013 March storm event (17 March 2013). In this study, we used eight ionospheric models ranging from empirical to physics-based, coupled ionosphere-thermosphere and data assimilation models. The quantities we considered are TEC and foF2 changes and percentage changes compared to quiet time background, and the maximum and minimum percentage changes. In addition, …