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Articles 31 - 60 of 1658

Full-Text Articles in Physics

Mesospheric Gravity Wave Climatology And Variances Over The Andes Mountains, Jonathan Rich Pugmire Dec 2018

Mesospheric Gravity Wave Climatology And Variances Over The Andes Mountains, Jonathan Rich Pugmire

All Graduate Theses and Dissertations

Look up! Travelling over your head in the air are waves. They are present all the time in the atmosphere all over the Earth. Now imagine throwing a small rock in a pond and watching the ripples spread out around it. The same thing happens in the atmosphere except the rock is a thunderstorm, the wind blowing over a mountain, or another disturbance. As the wave (known as a gravity wave) travels upwards the thinning air allows the wave to grow larger and larger. Eventually the gravity wave gets too large – and like waves on the beach – it crashes causing ...


Rectifying Garbage-In Equals Garbage-Out Using A Secondary Electron Yield Materials Database, Phil Lundgreen, Jr Dennison Nov 2018

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 Nov 2018

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 Speirs, Mohammad Mansoor, Randy Hurd, Saberul Sharker, W. G. Robinson, B. J. Williams, Tadd T. Truscott Oct 2018

Entry Of A Sphere Into A Water-Surfactant Mixture And The Effect Of A Bubble Layer, Nathan Speirs, Mohammad Mansoor, Randy Hurd, Saberul 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. Speirs, Mohammad M. Mansoor, Jesse Belden, Randy C. Hurd, Zhao Pan, Tadd T. Truscott Oct 2018

Fluted Films, Nathan B. Speirs, Mohammad M. Mansoor, Jesse Belden, Randy C. 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


Electron Yield Of A Carbon-Composite Nanodielectric, Jr Dennison, Matthew Robertson, Gregory Wilson, Justin Christensen Oct 2018

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 Oct 2018

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.


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 Oct 2018

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.


Optical Transmission Of Irradiated Optical Filters, Jr Dennison, Ashlan Keeler, Brian Wood, Jonh Mojica Decena Oct 2018

Optical Transmission Of Irradiated Optical Filters, Jr Dennison, Ashlan Keeler, Brian Wood, Jonh Mojica Decena

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 Oct 2018

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.


Simulating Microgravity And Space Radiation With A Rotary Cell Culture System (Rccs), Alexandra Nelson, Lori Caldwell, Eryn Hanson, Jr Dennison, Elizabeth Vargis Oct 2018

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.


Electron Yield Measurements Of Multilayer Conductive Materials, Gregory Wilson, Matthew Robertson, Jordan Lee, Jr Dennison Oct 2018

Electron Yield Measurements Of Multilayer Conductive Materials, Gregory Wilson, Matthew Robertson, Jordan Lee, Jr Dennison

Presentations

No abstract provided.


Real-Time Video Processing Of Arcing Events To Determine Coincidence, Jr Dennison, Gregory Wilson, Jonh Mojica Decena, Brian Wood Oct 2018

Real-Time Video Processing Of Arcing Events To Determine Coincidence, Jr Dennison, Gregory Wilson, Jonh Mojica Decena, Brian Wood

Presentations

No abstract provided.


An Analysis Of Variations In Published Secondary Electron Yield Measurements Of Copper, Phil Lundgreen, Jr Dennison Oct 2018

An Analysis Of Variations In Published Secondary Electron Yield Measurements Of Copper, Phil Lundgreen, 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 Oct 2018

Real-Time Video Processing Of Arcing Events To Determine Coincidence, Jr Dennison, Gregory Wilson, Jonh Mojica Decena, Brian Wood

Posters

No abstract provided.


Electron Yield Of Carbon-Composite Nanodielectric, Matthew Robertson, Justin Christensen, Gregory Wilson, Jr Dennison Oct 2018

Electron Yield Of Carbon-Composite Nanodielectric, Matthew Robertson, Justin Christensen, Gregory Wilson, Jr Dennison

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 Oct 2018

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.


Effects Of Radiation On The Electrostatic Discharge Of Polymers, Kip Quilter, Megan Loveland, Alexandra Hughlett, Jr Dennison Oct 2018

Effects Of Radiation On The Electrostatic Discharge Of Polymers, Kip Quilter, Megan Loveland, Alexandra Hughlett, Jr Dennison

Posters

No abstract provided.


An Analysis Of Variations In Published Secondary Electron Yield Measurements Of Copper, Phil Lundgreen, Jr Dennison Oct 2018

An Analysis Of Variations In Published Secondary Electron Yield Measurements Of Copper, Phil Lundgreen, Jr Dennison

Posters

No abstract provided.


Electron Yield Measurements Of Multilayer Conductive Materials, Gregory Wilson, Matthew Robertson, Jordan Lee, Jr Dennison Oct 2018

Electron Yield Measurements Of Multilayer Conductive Materials, Gregory Wilson, Matthew Robertson, Jordan Lee, 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 Oct 2018

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.


Real-Time Video Processing Of Arcing Events To Determine Coincidence, Jr Dennison, Gregory Wilson, Jonh Mojica Decena, Brian Wood Oct 2018

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 ...


Characterizing Vibrationally Induced Damage Of Carbon Nanotube Forests, Jordan Lee, Brian Wood, Ashlan Keeler, Jr Dennison, T. -C. Shen Oct 2018

Characterizing Vibrationally Induced Damage Of Carbon Nanotube Forests, Jordan Lee, Brian Wood, Ashlan Keeler, Jr Dennison, T. -C. Shen

Presentations

No abstract provided.


Characterizing Vibrationally Induced Damage Of Carbon Nanotube Forests, Jordan Lee, Brian Wood, Ashlan Keeler, Jr Dennison, T. -C. Shen Oct 2018

Characterizing Vibrationally Induced Damage Of Carbon Nanotube Forests, Jordan Lee, Brian Wood, Ashlan Keeler, 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 Oct 2018

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.


Charging Effects Of High Voltage Probe Pulse On Pulsed Electroacoustic Measurements, Zachary Gibson, Jr Dennison, Lee Pearson, Erick Griffiths, Anthony Pearson Oct 2018

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.


Optical Transmission Of Irradiated Optical Filters, Ashlan Keeler, Jr Dennison, Brian Wood, Jonh Mojica Decena Oct 2018

Optical Transmission Of Irradiated Optical Filters, Ashlan Keeler, Jr Dennison, Brian Wood, Jonh Mojica Decena

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 J. Sojka, Lie Zhu Oct 2018

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 J. 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 ...


Long-Term Stability Of Ion-Beam Treated Space Polymers In Geo-Simulated Environment, J Kleiman, Z Iskanderova, L Krishtein, Jr Dennison, Brian Wood, C Best Oct 2018

Long-Term Stability Of Ion-Beam Treated Space Polymers In Geo-Simulated Environment, J Kleiman, Z Iskanderova, L Krishtein, Jr Dennison, Brian Wood, C Best

Presentations

No abstract provided.


Long-Term Stability Of Ion-Beam Treated Space Polymers In Geo-Simulated Environment, J Kleiman, Z Iskanderova, C Best, Jr Dennison, Brian Wood Oct 2018

Long-Term Stability Of Ion-Beam Treated Space Polymers In Geo-Simulated Environment, J Kleiman, Z Iskanderova, C Best, Jr Dennison, Brian Wood

Presentations

No abstract provided.