Bulletin of the American Physical Society
2015 Joint Fall Meeting of the APS and AAPT New England Sections
Friday–Saturday, November 6–7, 2015; Hanover, New Hampshire
Session A1: Contributed Posters |
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Chair: Marcelo Gleiser, Dartmouth College Room: Hopkins Center Alumni Hall |
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A1.00001: Time Distortion Homer Tilton, Florentin Smarandache Time distortion described by special relativity is only an appearance without being ``real'' in the sense that Einstein taught before 1921. The general relativity environment (acceleration / gravitation) can truly affect the running of clocks which depend on atomic processes for their timekeeping and in that sense the distortion is real; and while all atomic processes would be expected to run slower under increased gravitation fields, biological processes, pendulum-regulated clocks and balance-wheel-regulated clocks would not be affected in the same way; and it seems needlessly abstruse to say that the rate of flow of ``time itself'' is affected by the presence of a gravitational field. [Preview Abstract] |
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A1.00002: Modeling Neutron Star Stability with a Modified Tolman-Oppenheimer-Volkoff Equation James O'Brien, Spasen Chaykov The Tolman-Oppenheimer-Volkoff (TOV) equation represents the solution to the Einstein field equations where the source of curvature is given by the stress-energy tensor of a perfect fluid. In flat space it has the form $T_{\mu\nu} = (\rho + p)U_\mu U_\nu + p\eta_{\mu\nu}$ and the convention for curved space-time is to just replace the Minkowski metric with $g_{\mu\nu} $. For our research we instead use a modified stress-energy tensor of the form $T_{\mu\nu} = (\rho + p)U_\mu U_\nu + pg_{\mu\nu} + \pi_{\mu\nu} $ where the anisotropic $\pi_{\mu\nu} $ is a symmetric, traceless rank two tensor which obeys $U^\mu\pi_{\mu\nu} = 0$. The motivation is that such a term in the stress-energy tensor can account for effects due to the curvature of space-time and would not be present in the tensor describing flat space.The final revised TOV equation is of the form $-r^2p' = GM\rho[1+\frac{p-2q}{\rho}][1+\frac{4\pi r^3(p-2q)}{M}][1-\frac{2GM}{r}]^{-1}-2r^2q' - 6rq $ where the primes indicate differentiation with respect to the radial coordinate and the q terms arise from the components of $\pi_{\mu\nu}$. The equation was then solved numerically with both a polytropic and a MIT bag model equations of state. The result is a changed prediction for the stability range of neutron stars. [Preview Abstract] |
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A1.00003: Alternative Gravity Rotation curves for the Little Things Survey James O'Brien, Jeremy Dentico, Brian Stefanski, Adam Smith, Robert Moss, Modestas Stulge Galactic rotation curves have proven to be the testing ground for dark matter bounds in spiral galaxies of all morphologies. Dwarf Galaxies serve as an increasingly interesting testing ground of rotation curve dynamics due to their increased stellar formation and typically rising rotation curve. These galaxies usually are not dominated by typical stellar structure and mostly terminate at small raidial distances. This, coupled with the fact that Cold Dark Matter theories such as NFW ({$\Lambda CDM$}) struggle with the universality of galactic rotation curves, allow for exclusive features of alternative gravitational models to be analyzed. Recently, the THINGS (The HI Nearby Galactic Survey) has been extended to include a sample of 25 dwarf galaxies now known as the Little Things Survey. Here, we present a thorough application of alternative gravitational models to the Little Things survey, specifically focusing on MOND and Conformal Gravity. An analysis and discussion of the results of the fitting procedure of the two alternative gravitational models are explored. We posit here that both the Conformal Gravity and MOND can provide an accurate description of the galactic dynamics without the need for copious dark matter. [Preview Abstract] |
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A1.00004: Stability bounds on compact astrophysical objects from information-entropic measure Nan Jiang, Marcelo Gleiser We obtain bounds on the stability of various self-gravitating astrophysical objects using a new measure of shape complexity known as configurational entropy. We apply the method to Newtonian polytropes, neutron stars with an Oppenheimer-Volkoff equation of state, and to self-gravitating configurations of complex scalar field (boson stars) with different self couplings, showing that the critical stability region of these stellar configurations obtained from traditional perturbation methods correlates well with critical points of the configurational entropy with accuracy of a few percent or better. [Preview Abstract] |
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A1.00005: Inflation and the Measurement Problem Dhrubo Jyoti, Stephon Alexander, Joao Magueijo Inflation is a very successful paradigm in cosmology, solving the Horizon, Flatness and Monopole problems with the Hot Big Bang theory. But perhaps its biggest selling point is that, it provides an elegant, quantum mechanical origin of large scale structure. [Starobinski, 1980; Guth and Pi, 1982] However, while this description of the emergence of primordial structure from quantum zero-point fluctuations of the inflaton field has been studied in detail for decades [Prokopec 1994; Polarski and Starobinski 1996; Kiefer et al. 2007], a number of prominent authors acknowledge important gaps in our understanding of the mechanism [Weinberg, ``Primordial Cosmology''; Lyth and Liddle, ``The Primordial Density Perturbations''; Padmanabhan, ``Cosmology'' CUP]. (For a review, see [Sudarsky et al 2006]) Even some of the leading proponents of the theory concede that the current description, the so-called quantum-to-classical transition, is only ``pragmatic" and needs eventually to be fully justified [Kiefer and Polarski 2009]. In our upcoming paper [Alexander, Jyoti and Magueijo, to appear], we discuss and define this cosmological quantum measurement problem, and propose a solution. Our work is similar in spirit to that of [Martin, Vennin, Peter 2012; Canate, Pearle, Sudarsky 2013], except that we propose an effective collapse mechanism arising from interaction of Fourier modes, rather than a fundamental modification to the Schrodinger equation. [Preview Abstract] |
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A1.00006: LIFE IN THE WHISPERING COSMOS? Paul H. Carr Could there be life on the billions and billions of exoplanets in the Whispering Cosmos (1)? This is the back-body radiation that has expanded and cooled from the hot big bang 13.8 billion years ago. The 4.5 billion year history of our planet is our best data source for life. About 0.8 billions years after the earth was formed, the first prokaryote cells emerged. Two billion years later, they developed photosynthesis that slowly converted the carbon dioxide, CO2, in the earth's early atmosphere to 20{\%} oxygen. This enabled the Cambrian explosion of multicellular life 0.54 years ago. Dinosaurs needed these higher concentrations to oxidize sugar for energy. Harvard biologist Ernst Mayr believed that single celled life may be common in our universe, but intelligence is rare. Venus had a runaway greenhouse effect. Its dense CO2 atmosphere is 730 K, hot enough to melt lead. Might our earth undergo a runaway greenhouse effect similar to Venus? Since the industrial revolution, the increased burning of fossil fuels is raising CO2 levels 300 times faster than the CO2 increase after the Ice Age. REFERENCE (1) Paul H. Carr, ``Not with a Bang, but a Whisper,'' APS News, Letter, December 2007. [Preview Abstract] |
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A1.00007: The Cable-Car Model Homer Tilton, Florentin Smarandache A sailing ship which depends on light from the sun to accelerate it remains in that way connected to the sun; its reference is the sun, and its speed is limited to less than the speed of light, $c$, relative to the sun. Propulsive energy cannot reach a ship traveling away from the sun faster than that. It is limited to the speed of light for the same reason a cable car is limited to the speed of the cable. It is riding on, and being pulled along by, a lightbeam. Einstein wondered what it would be like to ride on a lightbeam. It may simply be like riding on a cable car. A sailing ship is limited to that speed, $c$, by design, not by some inscrutable, overarching, outranks-everything-else Law of Nature. A speed limit - an actual speed limit -- exists for it. On the other hand if the ship carried a back-up rocket it could now be lit to provide additional thrust and further acceleration. [Preview Abstract] |
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A1.00008: Temperature Dependent Study of Dielectric Parameters for In-Ag Doped Glassy Alloy Dipti Sharma, Suresh Sharma, Rajendra Shukla, Ashok Kumar Temperature dependent study of dielectric constant and dielectric loss were done for bulk chalcogenide glassy alloy of Se90In8Ag2 varying temperature from 298 K to 476 K. The dielectric constant found to be increased as temperature increased and then showed a plateau decreased from the higher value for the higher temperatures whereas the dielectric loss found to be decreased first and then a small increase as temperature increased. The temperature dependence of dielectric constant and dielectric loss could be explained using Guintini and Elliott's model of correlated barrier hopping over a potential barrier.1-3. (1) D. Sharma et al., Thin Solid Films 357 (1999) 214-217; (2) D. Sharma et al., Adv. Mater. Opt. Electron. 10 (2000) 251-259; (3) D. Sharma et al., Materials and Manufacturing Process 18 (2003) 93-104. Keywords: Temperature dependence, dielectric constant, dielectric loss, Ag doped glassy alloy. [Preview Abstract] |
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A1.00009: Long-Lived Nuclear Spin States in Monodeuterated Methyl Groups Stuart Elliott, Stuart Sawyer, David Kolin, Lynda Brown, Daniel O'Leary, Malcolm Levitt Nuclear magnetic resonance (NMR) experiments are limited by relaxation dynamics. Observing non-equilibrium magnetization is restricted to timescales governed by the longitudinal relaxation time T$_{\mathrm{1}}$, which limits potential applications such as hyperpolarization or transport phenomena. Long-lived states (LLS) have relaxation times much longer than T$_{\mathrm{1}}$, providing a possible approach to overcome relaxation constraints. Often the duration of information capture is extended by an order of magnitude over T$_{\mathrm{1}}$. LLS commonly exist in symmetry-constrained homonuclear pairs termed singlet states, with some multi-spin variants established. Molecular systems exhibiting LLS include; parahydrogen, parawater, gamma-picoline, peptides, fumarates and naphthalenes. A recent addition to the LLS family is the monodeuterated methyl (CH$_{\mathrm{2}}$D) group. Radio frequency pumping of NMR silent spin states is achieved using the spin-lock induced crossing (SLIC) pulse sequence. A LLS decay constant (T$_{\mathrm{S}})$ of 27.0 \textpm 0.6 s was recorded. A number of CH$_{\mathrm{2}}$D-2-x-piperidine derivatives are currently in synthesis to extend singlet lifetimes and to control chemical shift differences, the later of which are to be compared with computational predictions. [Preview Abstract] |
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A1.00010: Parameters study of frequency-modulated continuous wave electrically detected magnetic resonance in phosphorus doped silicon at low magnetic field. Lihuang Zhu, Chandrasekhar Ramanathan In this study we investigate the detection sensitivity of frequency-modulated CW-EDMR to study paramagnetic spin defects in silicon. Our experiments are performed on phosphorus-doped natural silicon wafers with a home-built 2.5 GHz system (\textasciitilde 80 mT) at 5 K, where the low Q resonator together with the QuickSyn microwave source allows us to perform well controlled frequency modulation at 2.5GHz.Frequency modulation can potentially minimize the relative contribution of magnetic field induced currents in the EDMR experiment. We measure the signal to noise ratios of both the dangling bond and phosphorus dopant as a function of multiple experimental parameters such as modulation amplitude and modulation frequency. The optimal modulation frequency and modulation amplitude for both phosphorous and angling bond is found in our experiment. For frequency modulated low field CW-EDMR we observed that the resulted signal to noise ratio is qualitatively similar to field modulated CW-EDMR. The frequency modulated low field CW-EDMR provides technical advantage over field modulated CW-EDMR without sacrificing the signal to noise ratio. [Preview Abstract] |
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A1.00011: Exploring fluctuations in colloidal membranes with optical microscopy Jerome Fung, Zvonimir Dogic We discuss colloidal suspensions of rodlike particles that can self-assemble into monolayer membranes. The particles consist of $\sim$1-$\mu$m-long, $\sim$7-nm-diameter rodlike viruses. Adding a non-adsorbing polymer to a suspension of these virus rods induces a short-ranged attraction between the rods. This attraction can result in the formation of large sheets, one rod length thick, in which the rods lie parallel to each other. These colloidal membranes behave like biological lipid membranes, but are much easier to study with light since the virus rods are much larger than lipid molecules. We discuss measurements of two types of thermal fluctuations in these colloidal membranes using optical microscopy. First, we use an interferometric technique, reflection interference contrast microscopy, to measure height fluctuations of a membrane resting above a glass surface. These measurements may enable studies of the as yet unknown contribution of Gaussian curvature to the membrane free energy. Second, we examine membranes consisting of two types of viruses, one longer than the other, in which the long and short viruses can phase separate. We explore the free energy of the edges of phase-separated domains by measuring edge fluctuations using fluorescence microscopy. [Preview Abstract] |
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A1.00012: The Study of the Origins of Photoluminescence in Graphene Oxide Nicholas Lombardo, Anton Naumov In spite of multiple outstanding properties, a novel 2-dimensional nanomaterial, graphene, has now acquired a number of intriguing applications in microelectronics. However, due to its band structure with zero band gap, graphene does not show any optical response, which hampers its use in optoelectronic devices such as solar cells and light-generating devices. This work is directed toward inducing optical response in graphene through controlled oxidation and studying~the origins of such optical properties. It has been shown through previous works that ozone-induced transformation of Reduced Graphene Oxide (RGO) to Graphene Oxide (GO) alters the fluorescence signature of this graphene derivative, thus producing a band gap. We applied a controlled oxidation treatment to a water suspension of RGO in order to functionalize the material with oxygen containing groups, yielding GO.~ After the treatment, a broad fluorescence feature centered at \textasciitilde 532 nm was measured from the GO.~ Theoretical PM3 models of GO were then created in order to elucidate the origins of the fluorescence mechanism and suggest if optical properties of GO were caused by confinement effects or defect states at oxygen containing groups. [Preview Abstract] |
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A1.00013: Preparation and Properties of Nano-Particulate Conductive and Dielectric Oxides via Co-precipitation Using Various Chloride Sources James Masi, Timothy Holt, Mackenzie Sullivan Conductive and dielectric oxides (In$_{\mathrm{2}}$O$_{\mathrm{3}}$, BaTiO$_{\mathrm{3}}$, ZnO, ZnO:Al, and ZnO:In.) based nanoparticles have become a centerpiece for research in the scientific community over recent years. This work was conducted with the intent of developing a nano-particulate variable In, Zn, Ba, Ti (and doped combinations) oxide chemistry which was easy to implement at low temperatures (\textless 100$^{\mathrm{o}}$C) in the lab/classroom, and eliminating high temperature fabrication methods and metastability considerations. We used a metal chloride approach involving the eventual oxidation of combinatorial variations on the oxides. The initial tests were made by fabricating, from nano-particulate powders, both conductive thin layers and planar capacitors, calculating their electrical conductivity/permittivity, and their loss tangents at up to 1.8 GHz. The powders were properly suspended via wetting agents to prevent aggregation. The spin coated layers and plates were tested for both conductive/dielectric properties. The simplicity of the methods makes possible application in both secondary and university labs. [Preview Abstract] |
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A1.00014: What is a probability amplitude in the real physical world? Jeffrey Boyd What is a probability amplitude? All quantum mathematics (QM) is built on such amplitudes. Every other science uses probabilities; QM alone uses the square root of probabilities. Why? According to our model an amplitude is a real physical object. It has the shape of a cylindrical helix which particles follow backwards. This idea is found in Feynmans book QED. He speaks of amplitudes moving through space like the hands of a rapidly spinning clock. Particles follow such amplitudes with the probability of the square of the clocks hand (a complex vector). Such a hand traces a cylindrical helix. It conveys no energy. Feynman was mystified about what such amplitudes are in the physical world. But they are CENTRAL to his thinking. Feynman assumes that the clock faces travel in the same direction as particles. But empirical evidence suggests they travel in the opposite direction: particles follow amplitudes backwards. The Theory of Elementary Waves (TEW) is built on the idea that amplitudes and particles travel in opposite directions. If you review all wave particle duality experiments from this viewpoint, none of them contradict this. Other experiments can only be explained if amplitudes move in opposite direction as particles. [Preview Abstract] |
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A1.00015: A Study of the Dielectric Materials and Nano Particles Used in the Electrochemical Capacitors Hojung Chun, Soohyun Kim, Hyunjeong Chang In many technological fields, such as electro chemical fields, the development of nano technology has been arising in recent years. The capacitance of the capacitor is predicted to improve, when the space between the plates of a capacitor is filled with an insulator. In this research, the influence of multiple dielectric materials inserted in one capacitor on the electric field distribution, in the capacitor system was studied. Patterns of the capacitances were found, and the electric charges and electric energy in the capacitor plates were calculated. Compared to a standard capacitor, a super-capacitor can hold hundreds of times more electrical density. In this study, we show how nano particles, the metal-organic frameworks (MOFs) can be integrated into super-capacitor devices. How the flexibility with which their metal oxide and organic constituents, can be varied and used to uncover their high capacitance and long life-cycle behavior, are also shown. This study examines how metal-organic frameworks (MOFs) made as nanocrystals (nMOFs), can be successfully incorporated into electrical devices to be used as super-capacitors. Using this mechanism, a MOF with multiple metal ions and organic functionalities is suggested. [Preview Abstract] |
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A1.00016: Functionalization of Graphene via Atmospheric Pressure Plasma Jet. Weixin Huang Graphene, the two-dimensional sp$^{\mathrm{2}}$ -hybridized carbon, has received significant attention due to its unusual physical and chemical properties. Its zero band gap, however, weakens the competitive strength of graphene to achieve semiconducting behavior. Functionalization of graphene that deforms the band structure of graphene can result in a metal-semiconductor transition. We report our investigations on functionalization of single layer graphene using an atmospheric pressure plasma jet (APPJ) that can generate a variety of reactive plasma species at near-room temperatures. An APPJ was ignited in He and used for treatment of monolayer graphene surfaces. These surfaces were analyzed by ultra-high vacuum X-ray photoelectron spectroscopy (XPS). The obtained C 1s XPS spectra allowed identification of formed surfaces species (C-OH, C-O-C, C$=$O, and COOH) and demonstrated that the growth rate of a specific oxygen species depends on exposure time of plasma treatment. Plasma-treated graphene films containing more than 40{\%} oxygen content were obtained in the atmospheric environment. [Preview Abstract] |
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A1.00017: USING CELLULAR PHONE VIDEO CAPTURE SOFTWARE TO DETERMINE 2-D KINEMATICS AND DRAG FORCE ON PROJECTILES Ryan Dorland Student use of cellular phones is ubiquitous at any college campus. Several companies have taken advantage of this opportunity to utilize the graphics and computing power available to students. In a series of laboratory experiments in an introductory college physics course, we made use of Vernier Video Physics\texttrademark for iPad\texttrademark and iPhone\texttrademark to determine the 2-D kinematics equations of a water balloon launch. Since R$_{\mathrm{e}}$ \textgreater 1000, students were able to determine the drag force on the balloon and verify a quadratic relationship with velocity, and answer many questions related to drag. Using video-capture software allows for inclusion and treatment of topics such air resistance that are usually ignored or minimized at an introductory level, and provides students with `their own data on their own phone' to extend understanding of ideal and real projectiles beyond textbook examples. [Preview Abstract] |
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A1.00018: Quantitative Analysis of Database Use: Post-Secondary Expert and Novice Characteristics Andria Schwortz, Andrea Burrows Database skills are used in many STEM fields, from healthcare work with hundreds of patients, to astronomy research with tens of thousands of galaxies. However, few fields explicitly teach students the necessary skills to analyze such data. The authors studied a matched set of 87 participants working with large datasets, using astronomical data from the Sloan Digital Sky Survey as the specific data. Participants were university students, in-service and pre-service K-12 teachers, science graduate students, and science and science fiction authors. An eight question multiple choice pre-/post-test was administered, on the skills of analyzing datasets and the astronomy content. Scores were compared and a t-test performed for males vs. females and undergraduates vs. non-undergraduates, for both the pre- and post-tests, for the test as a whole and with questions split by novice/expert level and by skills/content. Participants exhibited gains in both recall and synthesis questions, indicating learning of astronomy content and database skills are non-linear. Participants also exhibited learning in both database skills and astronomy content. Implications include a stronger database focus, both in the creation and analysis, in K-20 STEM education. [Preview Abstract] |
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A1.00019: "Snowflake" Bentley's Guide to Viewing Aurora in New England Gary Parker Many students in New England have never seen an aurora despite its frequency of occurrence being more than 5 percent. Wilson Bentley (1865-1931), a Vermont farmer who became famous for pioneering snowflake photography, started a daily aurora watch at age 17 and maintained it into the last month of his life. This record contains three temporal patterns of auroral occurrence that offer not only helpful guidance to fruitful observing but also a promising approach to engaging students on the topics of space weather and star/planet relationships. [Preview Abstract] |
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A1.00020: A CLOSER LOOK AT EDUCATIONAL ISSUES PERTAINING TO CLAIMS ABOUT DANGEROUS ANTHROPOGENIC CLIMATE CHANGE-GLOBAL WARMING Laurence I. Gould Many arguments have been made that -- as a result of human activities which emit greenhouse gases (mainly carbon dioxide) -- there is a dangerous trend of increasing global temperatures so as to result in events such as melting glaciers, rising sea levels, and increased storms. Material presented in this poster draws on topics from a one-semester freshman seminar course taught at the University of Hartford in 2009 and again in 2014. The course was devoted to a critical-thinking approach to the topic of Dangerous Anthropogenic Climate Change-Global Warming. This poster will -- through an analysis which includes some of those arguments and methodologies -- show how curious people can seek a deeper understanding of the issues and thus enhance their ability at scientific enquiry. The material should be of particular interest to students and educators. [Preview Abstract] |
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A1.00021: Analysis of Bio-Images Using the Gaussian Functions and Histograms Bokeun Kwon, William Xiao, Hayoung Kyung The operation of an imaging process in MRI includes transforming the weak radio signal, known as magnetic resonance obtained from the part of the body that is being scanned, to the frequency domain. The computer program in the MRI then uses this frequency information to create images of the body tissues. To produce an MRI image of the body tissues, this paper presents the data that is reduced in size from a frequency domain in a relatively large k-space that can be collected using two different filters. Rather than using common exponential functions, we are able to create higher quality images by using MRI filters based on proposed exponential equations. The proposed equations allow k-space data to be recorded in more directions, reducing the ringing artifact, unlike a square equations that create spurious signals near sharp transitions. The proposed filter can capture more or less data in k-space, as the exponential power changes. Therefore, determining that the best image is shown when a certain number in the k-space is chosen. In this paper, the histogram of an equalized image of the MRI scan is analyzed to create clear and evenly distributed frequencies. Such different histograms produce different k-spaces generated by Fourier Transformation. [Preview Abstract] |
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A1.00022: Biomechanical Fracture Risk Analysis of the Human Femur Bone JAE HOON CHOI, HAYOUNG Kyung, JIMIN DAVID SHIN The femur is the longest and the strongest bone in the human body. In this research, biomechanical simulation of the loads and energies required to fracture the proximal part of the femur has been carried out in various cases under fixed variables. Factors such as loading conditions, mass of the colliding objects, speed of the mass, speed of the femur, and human weights were all considered as possible variables simulating one particular type of collision. Quantitative computed energy absorbed from the collision or fall was used to estimate the risk of fracture of the femur bone. Average bone density of 1500 kilograms per cubic meter, 1.3cm in radius and 27 percent of a person's height were used to calculate different masses of the femur in different heights of adults. By calculating the energy or work to fracture the isolated femur, we expect the use of the proposed variables to show improved assessments of the degree of fracture and of the component of risk of fracture that is associated with different types of collision. Data shows that the speed of the colliding object and moving speed of the human during collision or fall, rather than bone strength itself, can be the dominant factors causing the fracture of the femur bone. [Preview Abstract] |
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A1.00023: Computational and Physical Analysis of Cardiovascular System Hayoung Kyung, Seung Yoon Lee, Luther Lu The website created in CSS and html coding language, describes the computational analysis of cardiovascular system. A web application program created in Javascript, has been adapted to the website to aid users determine if one has cardiovascular disease; specifically aortic stenosis. The grade of an aortic stenosis condition, is categorized into five cases: Normal, mild, moderate, severe, or critical. This information on this web application is meant to be educational based on basic physical equations, cardio, physics and computer simulations. A variety of methods are employed to assess the degree of aortic stenosis in our program; including mean transvalvular gradients and valve area, calculated by the continuity equation. Our results show that severe AS causing LV systolic dysfunction depends on the transaortic velocity, and AS can lead to a patient with severe LV dysfunction. As the data shows, the AVV causing AS occurs at 3.0 cm/sec. However, given there is not a uniform diameter, the measurement using echocardiogram may be inaccurate in cases of aortic stenosis. If the obtained valve area using the echocardiogram is in the range of AS, the hemodynamics can be used for the validation. [Preview Abstract] |
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A1.00024: Maintaining the First Bohr Orbit Radius by Photon Suppression Ernst Wall We utilize a novel method for describing the mechanism that maintains the hydrogen atom's electron at its calculated first Bohr radius within 52 ppm of the experimental value. The basis of this model is a finite sized, revolving light speed point charge model of a vortex electron having a Compton circumference orbit. We relate the finite sized orbital radius of the vortex electron to that of the Bohr radius by means of the inverse fine structure constant to within 52 ppm. To determine the Bohr radius, this vortex electron model, as its charge revolves internally, generates a vortex of outwardly spiraling Compton length wavelets cyclotron fashion that are reflected off of the nucleus and back onto the electron. Previously, we explored impacts on the electron's charge. But here, the Compton wavelets in front of an accelerating electron are compressed, and those in back of it are decompressed, in both cases at a greater and greater rate, causing an increasing electric field across the electron's finite extent, and this generates photons. The reflected wavelets synchronously overlay the electron at the Bohr radius and neutralize its radiating electric field, suppressing its ability to radiate its energy away, holding it there. Ref.- www.tachyonmodel.com [Preview Abstract] |
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A1.00025: Dartmouth GreenCube: ~Undergraduate Physics Balloon Research Saba Nejad GreenCube is a scientifically motivated, student-driven CubeSat development and flight program in Dartmouth Physics. With each balloon flight we try to incorporate new design features into potentially small payloads for Low Cost Access to Space (LCAS) aurora sounding rocket proposals by Professor Lynch. We've had balloon launches every year for the past few years. We used the data collected in the previous balloon flight to compare the accuracy of different pressure and temperature sensors which les to us eliminating one for this coming balloon flight. We are also adding a light detecting sensor and scintillator block in this coming balloon flight in order to be able to detect muons. GreenCube also participated in Dartmouth's 2015 Digital Arts Expo with a project called Interactive Vector Field Visualization. We created an array of Arduino-powered sensors which measured wind speed and direction and mapped the data in real time to create an interactive display. It's important to note that every aspect of the balloon launches, starting from the ideas and design to implementation and building the different parts is done by the students themselves. [Preview Abstract] |
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