Bulletin of the American Physical Society
Far West Section Fall 2021 Meeting
Volume 66, Number 12
Friday–Saturday, October 29–30, 2021; Virtual
Session N01: Poster Session II (12:00-12:45pm) |
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N01.00001: Extracting and correcting neutron kinetic energy from neutron time-of-flight in the NIFFTE experiment Vanessa Aguilar The Neutron Induced Fission Fragment Tracking Experiment (NIFFTE) investigates nuclear fission using pulsed beams provided by the Los Alamos Neutron Science Center (LANSCE). As part of my research this summer my goal was to accurately determine the neutron energy from neutron time-of-flight (nToF) by applying a gaussian fit to the photo-fission peak and extracting the mean distance between the spallation target and the fission target. After that, the data must also be corrected for wraparound, which happens when faster neutrons from previous pulses overlap with ones from the current pulse. I looked into a method that can be taken to correct it. A double exponential fit can be applied to the micropulse tail, and then a ratio of the counts above and below the fit can be taken to obtain the number of wraparound events per neutron energy bin. From here it’s just a matter of making a correction for the wraparound in the data. Analysis details and current results will be presented. [Preview Abstract] |
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N01.00002: A time-symmetric resolution of the Einstein's boxes paradox Michael Heaney The Einstein's Boxes paradox was developed by Einstein, de Broglie, Heisenberg, and others to demonstrate the incompleteness of the Copenhagen Formulation of quantum mechanics. I explain the paradox using the Copenhagen Formulation. I then show how a Time-Symmetric Formulation of quantum mechanics resolves the paradox in the way envisioned by Einstein and de Broglie. Finally, I describe an experiment that can distinguish between these two formulations. [Preview Abstract] |
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N01.00003: A Computational Study of Vertical Force Production in the Smallest Flying Insects Hrithik Aghav Two-dimensional immersed boundary simulations were performed to determine how stroke plane angle and wing flexibility affect vertical force production for the smallest flying insects. Experimental data pertaining to small insect flight is limited and therefore, their flight mechanisms are still largely unknown. The immersed boundary method was used to solve the fully-coupled fluid-structure interaction problem of a flexible wing immersed in a two-dimensional viscous fluid. We considered five different strokes: a horizontal stroke, three hybrid strokes, and a vertical stroke. We also considered five different wing flexibilities ranging from rigid to highly flexible. Our results indicate that at Reynolds numbers relevant to small insect flight, the vertical force produced by a wing decreases with increasing stroke plane angle regardless of its flexibility and a rigid wing generates more vertical force than flexible wings at all stroke plane angles. This implies that the combination of a rigid wing with a horizontal stroke plane could possibly be the wing flexibility and stroke plane angle combination that generates the most vertical force in the flight of the smallest insects. [Preview Abstract] |
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N01.00004: A Two-Dimensional Model of Three Vital Cardiac Functions. Anthony Cortez The common understanding of the heart describes it as a pump that works to move blood around the body. While conceptually accurate, the function of the heart is far more complicated than this. The goal of this work is to add a level of detail to this everyday view by forming a two-dimensional numerical model to provide a deeper qualitative understanding of the heart. In its completed state, the model will depict the propagation of electrical waves that trigger the contraction of simulated muscle, which pump simulated fluid through the virtual heart. Electrical wave propagation, muscle contraction, and fluid flow, constitute the three parts of the model that we are proposing. These processes will be modeled with the FitzHugh-Nagumo (FHN) model, a mass-spring model, and Smoothed Particle Hydrodynamics (SPH), respectively. Thus far the electrical wave and fluid simulations have been implemented independently to run in real time. Once the mass-spring model is completed, work will begin to couple the methods to form the final version of the simulation. Coupling these popular methods should produce a real-time simulation that provides a good qualitative picture of the specified processes and gives a framework for scaling the program to three-dimensions. [Preview Abstract] |
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N01.00005: Stereochemical Analysis of Biodegradable Chemicals: Applications in Nano-material Science Minseo Kang The demand for sustainable polymer molecules (e.g. pharmaceuticals) and the limited development of safe chemicals are growing problems of global concern. The accumulation of polymer-based drug carriers not only poses a significant health risk but also highlights the disadvantages of the body's drug delivery systems. For example, the poor biodegradability of polystyrene (PS), poly(methyl methacrylate) (PMMA), and poly(N Isopropylacrylamide) limit the materials' potential ability to aid in drug delivery. In this paper, aliphatic polyesters and modern molecules were studied to determine their successes in biodegradability and biocompatibility. Due to the limitless combinations of metals and linkers in the chelators, such as porphyrins and EDTA, physicochemical properties of the chelators were reviewed. Natural porphyrins are preferable to synthetic organic molecules because they are less toxic and biodegradable. Analytical and computational techniques were used for quantitative and qualitative characterizations of new biodegradable molecules in this research. [Preview Abstract] |
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N01.00006: Multiple Memories in an Anisotropic Swelling System Max Varverakis, Hilary Jacks SwellPy simulates a 2D system of disordered particles in which the particles can expand and repel away from overlapping neighbors; by applying this swelling operation multiple times, we are able to write information into the system as a memory that can be accessed at a later time. Our recent work applies anisotropy to the system to increase its memory capacity by a factor of 2 relative to the more standard isotropic system. This increased memory capacity may be generalizable to systems in higher dimensions. [Preview Abstract] |
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