Bulletin of the American Physical Society
2021 Joint Spring Meeting of the Texas Sections of APS, AAPT and Zone 13 of the SPS
Volume 66, Number 2
Thursday–Sunday, April 8–11, 2021; Virtual
Session D06: SPS Talks |
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Sunday, April 11, 2021 10:00AM - 10:12AM |
D06.00001: An Electromagnetic Induction Paradox Michael Espinosa, Dr. James C. Espinosa A thin wire is allowed to move with a velocity v parallel to a long straight wire carrying a current i. After solving for the induced emf using Faraday's law, we will apply Ritz's force law to arrive at the same solution. The wire will then be allowed to remain stationary while the current carrying wire will move with a velocity v. The answer for the field theory approach will change while the Ritz force law gives the same result. [Preview Abstract] |
Sunday, April 11, 2021 10:12AM - 10:24AM |
D06.00002: Low-Cost Gamma Ray Spectrometry Jonathan Samudio Typical gamma ray spectrometry is done using professional grade equipment with expensive scintillation detectors. This project aimed to construct a much lower cost detector which would provide a gamma spectrum that generally matches the accepted spectrum energies for a specific radionuclide. An attempt at constructing a custom high voltage power supply for the experimental apparatus was made, but errors in construction led to the use of a commercial power supply. The detector was assembled and wired to the Theremino software analyzer and a gamma spectrum was obtained and calibrated for Cs-137. This was then compared to control data and literature references and it was determined the low-cost apparatus does produce a recognizable and usable spectrum. However, the output signal is plagued by noise and is generally small which eliminated the possibility of further analyzer developments until the issue can be solved through troubleshooting and potential redesign . [Preview Abstract] |
Sunday, April 11, 2021 10:24AM - 10:36AM |
D06.00003: Periodic Transit Analysis of Exoplanet Host Candidate TIC 464340013 Cecilia Hassan NASA’s Transiting Exoplanet Survey Satellite (TESS) conducts an all-sky survey of significantly luminous stars and collects photometric data for potential transit analysis and exoplanet discovery. One exoplanet host candidate, TESS Input Catalog (TIC) item 464340013, is here examined. TIC 464340013 is a spectral type F5 main-sequence star with an absolute magnitude of 7.28. Photometric data of this star is folded into a phase diagram with a coherent transit dip. From this analysis, possible transit parameters are determined, most significantly a period of approximately 3.29 days. A known period is necessary for predicting future transits and facilitating future observations of the star. The transit parameters of TIC 464340013 lie within the bounds of the Tingley diagnostic for exoplanet transits, supporting the existence of a planet orbiting TIC 464340013. Also, successive modeling of the transit for orbital parameter analysis consistently reveals a semimajor axis less than four times larger than the radius of the star. The extreme likelihood of this planet’s existence, as well as the unusual size of its orbit, makes TIC 464340013 a prime candidate for follow-up investigation, so that the existence of the planet may be confirmed and its parameters more precisely quantified. [Preview Abstract] |
Sunday, April 11, 2021 10:36AM - 10:48AM |
D06.00004: Free Falling Atom James Espinosa, Dr. James C. Espinosa In the mid 1960's, Gryzinski published in the Physical Review Letters the idea that atomic electrons are falling into the nucleus. They are diverted by magnetic forces from entering it. We will summarize his development of this purely classical model and present a time line showing the rise and fall in the interest in this picture of the atom. [Preview Abstract] |
Sunday, April 11, 2021 10:48AM - 11:00AM |
D06.00005: Optical Tweezers Matthew Macasadia An ``optical tweezers'' device was constructed using an obsolete microscope and off-the shelf parts. This apparatus is intended to serve as a demonstration of the forces in a single beam,~gradient radiation pressure laser trap for use in the Texas Lutheran University (TLU) advanced lab course. At the start of this project, the tool was disassembled and scavenged for parts for other experiments. Once assembled, the challenge of a low-cost sample illumination mechanism became a roadblock to imaging the particles for trapping. The field of view~is on the order of only a few microns,~such that illuminating the sample without~imaging other artifacts is~not a trivial task.~In this project, we have developed an innovative light source that combines an ultra-low cost integrating sphere and an off the shelf super bright LED lamp. The light source design and construction, including integration of optics using custom, 3D-printed coupling parts will be discussed. [Preview Abstract] |
Sunday, April 11, 2021 11:00AM - 11:12AM |
D06.00006: Using Image Processing for Automated Object Tracking in Videos Levi Torres The goal of this research was to develop an efficient algorithm to track objects in videos using image processing methods. In order to run the algorithm, the desired video first had to be split into individual frames. In order to track the specific objects in the video, template images of the objects were defined. Then, using Python libraries including SciPy and scikit-image, each frame was processed to acquire a match to the templates which was used to track the objects throughout the duration of the video. In result, a proof-of-concept algorithm was developed that was able to efficiently track all the objects desired in the video. [Preview Abstract] |
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