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Finite-Difference-Time-Domain Simulation Of Ultrafast Experiments, Alpha Ma May 2022

Finite-Difference-Time-Domain Simulation Of Ultrafast Experiments, Alpha Ma

Macalester Journal of Physics and Astronomy

The Finite-Difference-Time-Domain (FDTD) method is a numerical method that calculates electric fields or magnetic fields by interleaving them in space and time. Using a python package called “MEEP”, I was able to write optical simulations of ultrafast experiments, especially the Terahertz Pump-Probe experiments. The goal of this project was to use FDTD simulation to measure the transmission of an electro-magnetic pulse passing through a thin film of conducting material on a dielectric substrate in order to study the characteristic conductivity of potential solar cell materials.

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Molecular Line Search In Archival Alma Imaging Of M87, Xueyi Li May 2022

Molecular Line Search In Archival Alma Imaging Of M87, Xueyi Li

Macalester Journal of Physics and Astronomy

We present a molecular line search in spectral imaging of the elliptical galaxy M87 using archival data from the Atacama Large Millimeter/sub-millimeter Array (ALMA). The primary goal of this project is to verify and characterize possible CO transition lines, which can be used for future studies to determine the dynamics of the system, or the mass of the supermassive black hole (BH) in the center of the galaxy. After performing extensive atmospheric modeling, we found that most of the absorption features have a corresponding atmospheric ozone transition, so it is unlikely that these features are either Galactic or extragalactic. We …

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Lie Algebras And The Poincare Group, Jack Hempel Costello May 2022

Lie Algebras And The Poincare Group, Jack Hempel Costello

Macalester Journal of Physics and Astronomy

This paper will discuss my research with
Professor Tonnis ter Veldhuis on the Poincare Group
and other similar algebraic approaches based on the
Minkowski Metric. This paper will begin with an
introduction discussing group theory and expand on its
specific applications in theoretical physics.

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Simulating Interactions Between Coronal Mass Ejections, Damen S. Beverlin, Tatiana Niembro May 2022

Simulating Interactions Between Coronal Mass Ejections, Damen S. Beverlin, Tatiana Niembro

Macalester Journal of Physics and Astronomy

Coronal mass ejections (CMEs) launch large amounts of plasma and magnetic fields into the interplanetary medium. Under the right initial conditions, this ejecta can reach Earth and cause issues with electronic devices. As such, we would like to have an accurate model that depicts how these CMEs propagate as they leave the sun. By using fluid dynamics and one-minute resolution in-situ solar wind data, we sought to simulate CME plasma propagation with analytical and numerical models. Because the interstellar medium contains other material and other events happen on the sun simultaneously, CMEs can interact with each other and other ejecta, …

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Custom Calibration And Correction Of Photoemission Electron Microscope Images Using Graphene, Henry Bell May 2022

Custom Calibration And Correction Of Photoemission Electron Microscope Images Using Graphene, Henry Bell

Macalester Journal of Physics and Astronomy

The Photoemission Electron Microscope (PEEM) is a full-field electron microscope that utilizes the photoelectric effect to image a surface. Due to a spatial resolution on the order of 10 nanometers and its ability to image both the morphology of a surface and its band structure, it is a useful tool for understanding the properties of materials for use in electronic devices. To correct for random sample misalignment and the experimental frame of reference in the spectroscopy mode of the PEEM, the 3D dataset must be rotated in both the momentum and energy coordinates which requires pixel calibration and energy alignment. …

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Knocking Down Nox: Examining The Effects Of Transportation Electrification On Urban Ozone Production In The South Coast Air Basin, Jason Beal May 2022

Knocking Down Nox: Examining The Effects Of Transportation Electrification On Urban Ozone Production In The South Coast Air Basin, Jason Beal

Macalester Journal of Physics and Astronomy

With last year’s commitment to all in-state sales of new passenger cars and trucks being zero-emission by 2035 (California Executive Order N-79-20), California is leading the charge for transportation electrification in the United States. Despite being at the forefront of climate change management and mitigation, California has some of the worst air quality in the nation. While primarily motivated by a desire to reduce carbon dioxide emissions and reliance on fossil fuels, transportation electrification will also have a significant impact on local air quality. The goal of this study is to quantify and qualify this impact in the context of …

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Scandy: Simulating Realistic Human Scanpaths In Dynamic Real-World Scenes, Nicolas Roth, Martin Rolfs, Klaus Obermayer May 2022

Scandy: Simulating Realistic Human Scanpaths In Dynamic Real-World Scenes, Nicolas Roth, Martin Rolfs, Klaus Obermayer

MODVIS Workshop

No abstract provided.

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Fixational Eye Movements, Perceptual Filling-In, And Perceptual Fading Of Grayscale Images, Michael E. Rudd May 2022

Fixational Eye Movements, Perceptual Filling-In, And Perceptual Fading Of Grayscale Images, Michael E. Rudd

MODVIS Workshop

No abstract provided.

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Constraining Computational Models Of Brightness Perception: What’S The Right Psychophysical Data?, Guillermo Aguilar, Joris Vincent, Marianne Maertens May 2022

Constraining Computational Models Of Brightness Perception: What’S The Right Psychophysical Data?, Guillermo Aguilar, Joris Vincent, Marianne Maertens

MODVIS Workshop

No abstract provided.

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Cut The Cacophony: Creating Effective Visual Materials For Teaching, Rachel Evans, Jennifer Mart-Rice May 2022

Cut The Cacophony: Creating Effective Visual Materials For Teaching, Rachel Evans, Jennifer Mart-Rice

Teaching the Teachers Conference

Teaching legal research can be dense, multi-layered, and downright difficult. Conveying the information you need to students in an accessible and understandable way can be tough, particularly when you need to translate and condense complex subject matter into tangible teaching materials. In this collaborative workshop, presenters Jennifer Mart-Rice and Rachel Evans team up to combine their collective instructional experiences and work with attendees to design impactful visuals for the classroom. Attendees will learn about the must-haves and best practices for handouts and slide decks before being broken into groups where they will select a challenging slide deck and put their …

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Tiling Rectangles And 2-Deficient Rectangles With L-Pentominoes, Monica Kane May 2022

Tiling Rectangles And 2-Deficient Rectangles With L-Pentominoes, Monica Kane

Rose-Hulman Undergraduate Mathematics Journal

We investigate tiling rectangles and 2-deficient rectangles with L-pentominoes. First, we determine exactly when a rectangle can be tiled with L-pentominoes. We then determine locations for pairs of unit squares that can always be removed from an m × n rectangle to produce a tileable 2-deficient rectangle when m ≡ 1 (mod 5), n ≡ 2 (mod 5) and when m ≡ 3 (mod 5), n ≡ 4 (mod 5).

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Identifying And Localizing Multiple Objects Using Artificial Ventral And Dorsal Visual Cortical Pathways, Zhixian Han, Anne Sereno May 2022

Identifying And Localizing Multiple Objects Using Artificial Ventral And Dorsal Visual Cortical Pathways, Zhixian Han, Anne Sereno

MODVIS Workshop

We concluded in our previous study that model cortical visual pathways actively retained information differently according to the different goals of the training tasks. One limitation of our study was that there was only one object in each input image whereas in reality there may be multiple objects in a scene. In our current study, we try to find a brain-like algorithm that can recognize and localize multiple objects.

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Modeling Perceptual Grouping Strategies In Visual Search Tasks, Maria Kon, Gregory Francis May 2022

Modeling Perceptual Grouping Strategies In Visual Search Tasks, Maria Kon, Gregory Francis

MODVIS Workshop

No abstract provided.

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Model Of Visual Contrast Gain Control And Pattern And Noise Masking, Joshua A. Solomon May 2022

Model Of Visual Contrast Gain Control And Pattern And Noise Masking, Joshua A. Solomon

MODVIS Workshop

The first stage of the model can be subdivided into a global contrast sensitivity function (a 2-D log-parabolic filter of spatial frequency), followed by an array of sensors having Gabor-pattern receptive fields. The second stage is contrast gain control. At this stage, sensor outputs are subjected to an expansive transformation. Then the outputs are pooled and used to inhibit (or “normalize”) each other. Inhibition is strongest between sensors with similar preferences for orientation, spatial frequency and spatial location. In the final stage of the model, the nomalized sensor outputs for each image are subjected to Minkowski pooling. Two-alternative, forced-choice detection …

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Beta-Alanine Supplementation And Anaerobic Performance In Highly Trained Judo Athletes, Mateusz Halz, Magdalena Kaszuba, Jonatan Helbin, Sara Krzysztofik, Aleksandra Suchanecka, Adam Zając May 2022

Beta-Alanine Supplementation And Anaerobic Performance In Highly Trained Judo Athletes, Mateusz Halz, Magdalena Kaszuba, Jonatan Helbin, Sara Krzysztofik, Aleksandra Suchanecka, Adam Zając

Baltic Journal of Health and Physical Activity

Introduction. Previous studies have shown that several weeks of beta-alanine (BA) supplementation increases anaerobic work capacity and decreases muscular fatigue, but limited research was conducted on elite martial arts athletes. Therefore, the purpose of this study was to investigate the effect of chronic BA supplementation on high-intensity intermittent upper and lower-body performance in highly-trained judo athletes. Material and Methods: Sixteen elite judo athletes (21.8 ± 2.5 years old) were randomly assigned to receive either BA (4 g/d over the first 2 weeks and 6 g/d in the last 2 weeks) or placebo for 4 weeks. Before and after BA supplementation, …

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Participation In Higher Intensity Physical Activity Predicts Lower Depressive Symptom Incidence In College Students, Lucas D. Elliott, Oliver Wilson, Michele Duffey, Melissa Bopp May 2022

Participation In Higher Intensity Physical Activity Predicts Lower Depressive Symptom Incidence In College Students, Lucas D. Elliott, Oliver Wilson, Michele Duffey, Melissa Bopp

International Journal of Exercise Science

International Journal of Exercise Science 15(7): 667-675, 2022. The prevalence of depression and insufficient physical activity (PA) continue to rise in the United States, particularly among college students. PA is typically associated with decreased levels of depressive symptoms; however, the association between different intensities of PA and depressive symptoms is unclear among college students. The aim of this study was to examine how well weekly moderate PA (MPA), vigorous PA (VPA) and strength training (ST) volumes predicted depressive symptoms in college students. Students self-reported weekly MPA, VPA, ST, depressive symptoms (CESD-7), restful nights of sleep, grade point average (GPA) and …

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Montmorency Cherry Juice Consumption Does Not Improve Muscle Soreness Or Inhibit Pro-Inflammatory Monocyte Responses Following An Acute Bout Of Whole-Body Resistance Training., Devin Drummer, Kelly Pritchett, Gina M. Many, Blaise Dondji, Kathleen Connor, Jerusalem Tesfaye, Mark Young, Robert C. Pritchett May 2022

Montmorency Cherry Juice Consumption Does Not Improve Muscle Soreness Or Inhibit Pro-Inflammatory Monocyte Responses Following An Acute Bout Of Whole-Body Resistance Training., Devin Drummer, Kelly Pritchett, Gina M. Many, Blaise Dondji, Kathleen Connor, Jerusalem Tesfaye, Mark Young, Robert C. Pritchett

International Journal of Exercise Science

International Journal of Exercise Science 15(6): 686-701, 2022. Montmorency Cherry Juice (MCJ) may­­­ improve acute exercise recovery by attenuating inflammation and oxidative stress. However, the anti-inflammatory effects of MCJ on monocyte responses following resistance exercise have not been explored. Seven resistance-trained males (age: 22.9 ± 4.1 yrs; height: 1.8 ± 0.1 m; weight: 81.7 ± 13.2 kg) participated in this study. Participants completed a placebo-controlled crossover design, drinking either MCJ or placebo beverages, 7 days prior to completing an acute bout of unilateral resistance exercise. Statistical significance was assessed using a within-subjects repeated measures ANOVA; alpha level p ≤ 0.05. …

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Acute Dose-Response Of Duration During The Plank Exercise On Muscle Thickness, Echo-Intensity, Peak Force, And Perception Of Effort In Recreationally-Trained Participants, Dani Al Sheikh Aleais, Keanna Sullivan, Paula Ferreira, Priscyla N. Marchetti, Paulo Henrique Marchetti May 2022

Acute Dose-Response Of Duration During The Plank Exercise On Muscle Thickness, Echo-Intensity, Peak Force, And Perception Of Effort In Recreationally-Trained Participants, Dani Al Sheikh Aleais, Keanna Sullivan, Paula Ferreira, Priscyla N. Marchetti, Paulo Henrique Marchetti

International Journal of Exercise Science

International Journal of Exercise Science 15(6): 676-685, 2022. The primary purpose of this study was to evaluate the acute effects of different durations of the isometric forearm plank exercise (IFPE) on peak force, echo intensity, muscle thickness, and perception of effort in recreationally-trained participants. Fifteen resistance-trained participants (23±3years, 76.4±6.5kg, 173.3±6.5cm) performed the IFPE with bodyweight in one of three durations in a randomized order: a). 1-min, b). 2-min, and c). 3-min. Muscle thickness (MT), echo intensity (EI), peak force (PF), and rating of perceived exertion (RPE) were measured pre-test and post-test. Two-way repeated-measures ANOVAs (2x3) were used to test differences …

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The Effects Of Static And Dynamic Stretching On Muscle Oxygen Saturation In The Rectus Femoris, Zachary R. Brodeur, Michael J. Paustian, Drew A. Monteleone-Haught, Robert A. Lamm, Annaliza G. Pagano, Carrie E. Ellis May 2022

The Effects Of Static And Dynamic Stretching On Muscle Oxygen Saturation In The Rectus Femoris, Zachary R. Brodeur, Michael J. Paustian, Drew A. Monteleone-Haught, Robert A. Lamm, Annaliza G. Pagano, Carrie E. Ellis

International Journal of Exercise Science

International Journal of Exercise Science 15(3): 702-708, 2022. The purpose of this study was to analyze the muscle oxygen saturation (SmO2) of static and dynamic warm-up and assess their impact on athletic preparation. The acute effects of static and dynamic stretching on muscular and functional performance have been well established, with many studies highlighting physiological factors and performance markers (such as range of motion and flexibility). To date, no studies have analyzed the effects of dynamic stretching on muscle oxygenation. Twenty-three recreationally fit participants performed both static (SS) and dynamic stretching (DS) protocols targeting the rectus femoris muscle …

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Invitational Pedagogical Approaches To Sharing Examples Of Witnessing In An Intercultural Communication Course, Kristen A. Hungerford May 2022

Invitational Pedagogical Approaches To Sharing Examples Of Witnessing In An Intercultural Communication Course, Kristen A. Hungerford

Feminist Pedagogy

No abstract provided.

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Teaching Feminist Media Studies In A Post-Weinstein Era, Gigi Mcnamara May 2022

Teaching Feminist Media Studies In A Post-Weinstein Era, Gigi Mcnamara

Feminist Pedagogy

In this critical commentary, I will address the concept of witnessing as it relates to contemporary feminist empowerment while also properly situating Weinstein-produced films as historical mediated texts.

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The Threat Of Returning To “Normal”: Resisting Ableism In The Post-Covid Classroom, Sarah M. Parsloe, Elizabeth M. Smith May 2022

The Threat Of Returning To “Normal”: Resisting Ableism In The Post-Covid Classroom, Sarah M. Parsloe, Elizabeth M. Smith

Feminist Pedagogy

The abrupt switch to online learning during the COVID-19 pandemic highlighted pervasive ableism; accommodations that had been “impossible” were suddenly available. This critical commentary draws from interviews with 16 students and our own ethnographic accounts as student/professor to understand how COVID shaped disabled experiences in the classroom. As a student with a disability, Elizabeth was hyperaware of her vulnerability to illness, but also experienced herself as less impaired online. She could control her learning environment to minimize sensory and mobility challenges. Additionally, professors’ flexible policies helped her to manage energy, time, and symptoms. However, Elizabeth and her peers feared an …

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Witnessing With Cameras Off: Feminist Pedagogy And The Zoom Classroom, Kristin Comeforo May 2022

Witnessing With Cameras Off: Feminist Pedagogy And The Zoom Classroom, Kristin Comeforo

Feminist Pedagogy

No abstract provided.

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I Choose You, Or Maybe You: Understanding The Prism Of Intersectionality Using Reality Dating Television Shows, Alisha L. Menzies May 2022

I Choose You, Or Maybe You: Understanding The Prism Of Intersectionality Using Reality Dating Television Shows, Alisha L. Menzies

Feminist Pedagogy

No abstract provided.

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"My Two Ears Can Witness": Feminist Pedagogy From Rehearsal Hall To Classroom, Ben Long, Noah Long, Laura Grace Godwin May 2022

"My Two Ears Can Witness": Feminist Pedagogy From Rehearsal Hall To Classroom, Ben Long, Noah Long, Laura Grace Godwin

Feminist Pedagogy

Given that university rehearsal halls are a natural home for feminist pedagogy, this paper addresses professors across campus under the contention that the signature pedagogy of theatre offers a model for faculty in other disciplines. The essay adapts a series of rehearsal hall techniques for traditional classrooms as efficient ways of fostering subjectivity, empowerment, community, and reflection in service of socio-cultural ends. The original teaching activities outlined herein do not require theatrical performance, but they nevertheless draw upon the power of live witnessing and interactive response that make theatre a powerful pedagogical tool. The authors conclude with an illustration of …

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Sharing Walks As A Witnessing Practice: Exploring Movement-Based Pedagogies, Catalina Hernandez-Cabal May 2022

Sharing Walks As A Witnessing Practice: Exploring Movement-Based Pedagogies, Catalina Hernandez-Cabal

Feminist Pedagogy

How we walk—or our inability to do so—is telling of who we have been. I propose this simple movement practice as a pedagogical engagement with the concept of faithful witnessing, which refers to attending to modes of power unbalance that might go unnoticed, and to people's creative and resistant possibilities (Lugones, 2003; Figueroa-Vásquez, 2015). This activity is suggested to provoke reflections about how we understand and experience social difference and power unbalances. The work introduces a simple score (a creative prompt) to explore walking-with others, creating instructions to teach others our movement, learning others', and delving into conversations concerning the …

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Witnessing Engaged Voices: A Feminist Pedagogy Of Inclusion, Alana M. Nicastro, Patricia Geist-Martin May 2022

Witnessing Engaged Voices: A Feminist Pedagogy Of Inclusion, Alana M. Nicastro, Patricia Geist-Martin

Feminist Pedagogy

When student perspectives, needs, and wants are left out of academic discourse, the discursive structures necessary to encourage, organize, and evaluate their voice are absent. Students then become ambivalent instead of exercising their voice and decisively assessing the value of their contributions. This original teaching activity targets the problematics that constrain voices in the classroom and invites readers and listeners to consider their positionality and action as a commitment to a Feminist Pedagogy of Inclusion (FPoI). In this way, students and professors can deliberately hold a space where the act of witnessing is more than simply observing voice. The intended …

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What’S The Word On The Street?: Witnessing/Performing Theory, Desirée D. Rowe May 2022

What’S The Word On The Street?: Witnessing/Performing Theory, Desirée D. Rowe

Feminist Pedagogy

No abstract provided.

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All Of The Products, None Of The Liability: Examining The Supreme Court Of Ohio's Decision In Stiner V. Amazon.Com, Inc., Danny O'Connor May 2022

All Of The Products, None Of The Liability: Examining The Supreme Court Of Ohio's Decision In Stiner V. Amazon.Com, Inc., Danny O'Connor

University of Cincinnati Law Review

No abstract provided.

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The Fate Of Comment 8: Analyzing A Lawyer's Ethical Obligation Of Technological Competence, Lisa Z. Rosenof May 2022

The Fate Of Comment 8: Analyzing A Lawyer's Ethical Obligation Of Technological Competence, Lisa Z. Rosenof

University of Cincinnati Law Review

No abstract provided.

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