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Articles 1  30 of 243
FullText Articles in Physics
9th Annual Postdoctoral Science Symposium, University Of Texas Md Anderson Cancer Center Postdoctoral Association
9th Annual Postdoctoral Science Symposium, University Of Texas Md Anderson Cancer Center Postdoctoral Association
MD Anderson Cancer Center Postdoctoral Association Annual Postdoctoral Science Symposium Abstracts
The mission of the Annual Postdoctoral Science Symposium (APSS) is to provide a platform for talented postdoctoral fellows throughout the Texas Medical Center to present their work to a wider audience. The MD Anderson Postdoctoral Association convened its inaugural Annual Postdoctoral Science Symposium (APSS) on August 4, 2011.
The APSS provides a professional venue for postdoctoral scientists to develop, clarify, and refine their research as a result of formal reviews and critiques of faculty and other postdoctoral scientists. Additionally, attendees discuss current research on a broad range of subjects while promoting academic interactions and enrichment and developing new collaborations.
A Tribute To Robert U. Ayres For A Lifetime Of Work In Technological Forecasting And Related Areas, Steven M. Miller
A Tribute To Robert U. Ayres For A Lifetime Of Work In Technological Forecasting And Related Areas, Steven M. Miller
Research Collection School Of Information Systems
Bob Ayres was born in the UnitedStates in 1932. For his university studies at the bachelors, masters and PhD levels, he concentrated in physics and mathematics. When we think of Bob today, we think of his pioneering work across the areas of technological forecasting, industrial metabolism and industrial ecology, and the role of energy and thermodynamics in economic growth. How did a person with a strong fundamental education as a physicist end up as a pioneering thinker and thought leader at the intersection of energy, environment and economics?
Unbounded Derivations Of C*Algebras And The Heisenberg Commutation Relation, Lara M. Ismert
Unbounded Derivations Of C*Algebras And The Heisenberg Commutation Relation, Lara M. Ismert
Dissertations, Theses, and Student Research Papers in Mathematics
This dissertation investigates the properties of unbounded derivations on C*algebras, namely the density of their analytic vectors and a property we refer to as "kernel stabilization." We focus on a weaklydefined derivation δ_{D} which formalizes commutators involving unbounded selfadjoint operators on a Hilbert space. These commutators naturally arise in quantum mechanics, as we briefly describe in the introduction.
A first application of kernel stabilization for δ_{D} shows that a large class of abstract derivations on unbounded C*algebras, defined by O. Bratteli and D. Robinson, also have kernel stabilization. A second application of kernel stabilization provides a ...
2019 Petersheim Academic Exposition Schedule Of Events, Seton Hall University
2019 Petersheim Academic Exposition Schedule Of Events, Seton Hall University
Petersheim Academic Exposition
2019 Petersheim Academic Exposition
Semiclassically Modeling Hydrogen At Rydberg States Immersed In Electromagnetic Fields, Jaron Williams
Semiclassically Modeling Hydrogen At Rydberg States Immersed In Electromagnetic Fields, Jaron Williams
Mathematics Senior Capstone Papers
Originally, closedorbit theory was developed in order to analyze oscillations in the near ionization threshold (Rydberg) densities of states for atoms in strong external electric and magnetic fields. Oscillations in the density of states were ascribed to classical orbits that began and ended near the atom. In essence, observed outgoing waves following the classical path return and interfere with original outgoing waves, giving rise to oscillations. Elastic scattering from one closed orbit to another gives additional oscillations in the crosssection. This study examines how quantum theory can be properly used in combination with classical orbit theory in order to study ...
Volume 11, Jacob Carney, Ryan White, Joseph Hyman, Jenny Raven, Megan Garrett, Ibrahim Kante, Summer Meinhard, Lauren Johnson, William "Editha" Dean Howells, Laura Gottschalk, Christopher Siefke, Pink Powell, Natasha Woodmancy, Katharine Colley, Abbey Mays, Charlotte Potts
Volume 11, Jacob Carney, Ryan White, Joseph Hyman, Jenny Raven, Megan Garrett, Ibrahim Kante, Summer Meinhard, Lauren Johnson, William "Editha" Dean Howells, Laura Gottschalk, Christopher Siefke, Pink Powell, Natasha Woodmancy, Katharine Colley, Abbey Mays, Charlotte Potts
Incite: The Journal of Undergraduate Scholarship
Table of Contents:
Introduction, Dr. Roger A. Byrne, Dean
From the Editor, Dr. Larissa "Kat" Tracy
From the Designers, Rachel English, Rachel Hanson
Synthesis of 3,5substituted Parabens and their Antimicrobial Properties, Jacob Coarney, Ryan White
Chernobyl: Putting "Perestroika" and "Glasnot" to the Test, Joseph Hyman
Art by Jenny Raven
Watering Down Accessibility: The Issue with Public Access to Alaska's Federal Waterways, Meagan Garrett
Why Has the Democratic Republic of the Congo outsourced its Responsibility to Educate its Citizens? Ibrahim Kante
Art by Summer Meinhard
A Computational Study of Single Molecule Diodes, Lauren Johnson
Satire of the State through ...
Surface Waves Over Currents And Uneven Bottom, Alan C. Compelli, Rossen Ivanov, Calin I. Martin, Michail D. Todorov
Surface Waves Over Currents And Uneven Bottom, Alan C. Compelli, Rossen Ivanov, Calin I. Martin, Michail D. Todorov
Articles
The propagation of surface water waves interacting with a current and an uneven bottom is studied. Such a situation is typical for ocean waves where the winds generate currents in the top layer of the ocean. The role of the bottom topography is taken into account since it also influences the local wave and current patterns. Specific scaling of the variables is selected which leads to approximations of Boussinesq and KdV types. The arising KdV equation with variable coefficients, dependent on the bottom topography, is studied numerically when the initial condition is in the form of the one soliton solution ...
Generalized Fock Spaces And The Stirling Numbers, Daniel Alpay, Motke Porat
Generalized Fock Spaces And The Stirling Numbers, Daniel Alpay, Motke Porat
Mathematics, Physics, and Computer Science Faculty Articles and Research
The BargmannFockSegal space plays an important role in mathematical physics and has been extended into a number of directions. In the present paper, we imbed this space into a Gelfand triple. The spaces forming the Fréchet part (i.e., the space of test functions) of the triple are characterized both in a geometric way and in terms of the adjoint of multiplication by the complex variable, using the Stirling numbers of the second kind. The dual of the space of test functions has a topological algebra structure, of the kind introduced and studied by the first named author and Salomon.
Full Dyon Excitation Spectrum In Extended LevinWen Models, Yuting Hu, Nathan Geer, YongShi Wu
Full Dyon Excitation Spectrum In Extended LevinWen Models, Yuting Hu, Nathan Geer, YongShi Wu
Mathematics and Statistics Faculty Publications
In LevinWen (LW) models, a wide class of exactly solvable discrete models, for twodimensional topological phases, it is relatively easy to describe only singlefluxon excitations, but not the charge and dyonic as well as manyfluxon excitations. To incorporate charged and dyonic excitations in (doubled) topological phases, an extension of the LW models is proposed in this paper. We first enlarge the Hilbert space with adding a tail on one of the edges of each trivalent vertex to describe the internal charge degrees of freedom at the vertex. Then, we study the full dyon spectrum of the extended LW models, including ...
A New Method For MultiBit And Qudit Transfer Based On Commensurate Waveguide Arrays, Jovan Petrovic, J. J. P. Veerman
A New Method For MultiBit And Qudit Transfer Based On Commensurate Waveguide Arrays, Jovan Petrovic, J. J. P. Veerman
Mathematics and Statistics Faculty Publications and Presentations
The faithful state transfer is an important requirement in the construction of classical and quantum computers. While the highspeed transfer is realized by opticalfibre interconnects, its implementation in integrated optical circuits is affected by crosstalk. The crosstalk between densely packed optical waveguides limits the transfer fidelity and distorts the signal in each channel, thus severely impeding the parallel transfer of states such as classical registers, multiple qubits and qudits. Here, we leverage on the suitably engineered crosstalk between waveguides to achieve the parallel transfer on optical chip. Waveguide coupling coefficients are designed to yield commensurate eigenvalues of the array and ...
Shape Resonances Of The Transverse Magnetic Mode In A Spherically Stratified Medium, Umaporn Nuntaplook, John A. Adam
Shape Resonances Of The Transverse Magnetic Mode In A Spherically Stratified Medium, Umaporn Nuntaplook, John A. Adam
Mathematics & Statistics Faculty Publications
Although morphologydependent resonances (MDRs) have been studied for decades, it is interesting to note that TM resonances have not been as widely investigated as those of the TE mode. Nevertheless, the formers are also worthy of additional study. Even though the TE and TM mode resonances can be generated using the same technique, their properties (such as the additional sharp peak in the source function at the particle surface) are quite distinct. We present the derivation of the resonance formulations for TM mode for both increasing and decreasing piecewiseconstant refractive index profiles in a twolayer model of a sphere embedded ...
Gravitational Radiation From A Toroidal Source, Aidan Schumann
Gravitational Radiation From A Toroidal Source, Aidan Schumann
Summer Research
This research uses a linearized form of Einstein's General Relativity to find the quadrupole moment from an oscillating toroidal mass and charge current. With the quadrupole terms, we found the gravitational radiation from the energy distribution. We make the assumptions that we are in the lowenergy and far field limits.
Quantum Econometrics: How To Explain Its Quantitative Successes And How The Resulting Formulas Are Related To Scale Invariance, Entropy, Fuzzy, And Copulas, Hung T. Nguyen, Kittawit Autchariyapanitkul, Olga Kosheleva, Vladik Kreinovich, Songsak Sriboonchitta
Quantum Econometrics: How To Explain Its Quantitative Successes And How The Resulting Formulas Are Related To Scale Invariance, Entropy, Fuzzy, And Copulas, Hung T. Nguyen, Kittawit Autchariyapanitkul, Olga Kosheleva, Vladik Kreinovich, Songsak Sriboonchitta
Departmental Technical Reports (CS)
Many aspects of human behavior seem to be welldescribed by formulas of quantum physics. In this paper, we explain this phenomenon by showing that the corresponding quantumlooking formulas can be derived from the general ideas of scale invariance, fuzziness, and copulas. We also use these ideas to derive a general family of formulas that include nonquantum and quantum probabilities as particular cases  formulas that may be more adequate for describing human behavior than purely nonquantum or purely quantum ones.
Introduction To The Usu Library Of Solutions To The Einstein Field Equations, Ian M. Anderson, Charles G. Torre
Introduction To The Usu Library Of Solutions To The Einstein Field Equations, Ian M. Anderson, Charles G. Torre
Tutorials on... in 1 hour or less
This is a Maple worksheet providing an introduction to the USU Library of Solutions to the Einstein Field Equations. The library is part of the DifferentialGeometry software project and is a collection of symbolic data and metadata describing solutions to the Einstein equations.
ModeSum Prescription For Vacuum Polarization In Black Hole Spacetimes In Even Dimensions, Peter Taylor, Cormac Breen
ModeSum Prescription For Vacuum Polarization In Black Hole Spacetimes In Even Dimensions, Peter Taylor, Cormac Breen
Articles
We present a modesum regularization prescription for computing the vacuum polarization of a scalar field in static spherically symmetric black hole spacetimes in even dimensions. This is the first general and systematic approach to regularized vacuum polarization in higher even dimensions, building upon a previous scheme we developed for odd dimensions. Things are more complicated here since the evendimensional propagator possesses logarithmic singularities which must be regularized. However, in spite of this complication, the regularization parameters can be computed in closed form in arbitrary even dimensions and for arbitrary metric function f(r). As an explicit example of our method ...
Evolution Of Superoscillations For Schrödinger Equation In A Uniform Magnetic Field, Fabrizio Colombo, Jonathan Gantner, Daniele C. Struppa
Evolution Of Superoscillations For Schrödinger Equation In A Uniform Magnetic Field, Fabrizio Colombo, Jonathan Gantner, Daniele C. Struppa
Mathematics, Physics, and Computer Science Faculty Articles and Research
AharonovBerry superoscillations are bandlimited functions that oscillate faster than their fastest Fourier component. Superoscillations appear in several fields of science and technology, such as Aharonov’s weak measurement in quantum mechanics, in optics, and in signal processing. An important issue is the study of the evolution of superoscillations using the Schrödinger equation when the initial datum is a weak value. Some superoscillatory functions are not square integrable, but they are real analytic functions that can be extended to entire holomorphic functions. This fact leads to the study of the continuity of a class of convolution operators acting on suitable spaces ...
Neuronal Correlation Parameter In The Idea Of Thermodynamic Entropy Of An NBody Gravitationally Bounded System, Ioannis Haranas, Ioannis Gkigkitzis, Ilias S. Kotsireas, Carlos Austerlitz
Neuronal Correlation Parameter In The Idea Of Thermodynamic Entropy Of An NBody Gravitationally Bounded System, Ioannis Haranas, Ioannis Gkigkitzis, Ilias S. Kotsireas, Carlos Austerlitz
Physics and Computer Science Faculty Publications
Understanding how the brain encodes information and performs computation requires statistical and functional analysis. Given the complexity of the human brain, simple methods that facilitate the interpretation of statistical correlations among different brain regions can be very useful. In this report we introduce a numerical correlation measure that may serve the interpretation of correlational neuronal data, and may assist in the evaluation of different brain states. The description of the dynamical brain system, through a global numerical measure may indicate the presence of an action principle which may facilitate a application of physics principles in the study of the human ...
A Finite Difference Method For OffFault Plasticity Throughout The Earthquake Cycle, Brittany A. Erickson, Eric M. Dunham, Arash Khosravifar
A Finite Difference Method For OffFault Plasticity Throughout The Earthquake Cycle, Brittany A. Erickson, Eric M. Dunham, Arash Khosravifar
Mathematics and Statistics Faculty Publications and Presentations
We have developed an efficient computational framework for simulating multiple earthquake cycles with offfault plasticity. The method is developed for the classical antiplane problem of a vertical strikeslip fault governed by rateandstate friction, with inertial effects captured through the radiationdamping approximation. Both rateindependent plasticity and viscoplasticity are considered, where stresses are constrained by a DruckerPrager yield condition. The offfault volume is discretized using finite differences and tectonic loading is imposed by displacing the remote side boundaries at a constant rate. Timestepping combines an adaptive RungeKutta method with an incremental solution process which makes use of an elastoplastic tangent stiffness tensor ...
BeurlingLax Type Theorems In The Complex And Quaternionic Setting, Daniel Alpay, Irene Sabadini
BeurlingLax Type Theorems In The Complex And Quaternionic Setting, Daniel Alpay, Irene Sabadini
Mathematics, Physics, and Computer Science Faculty Articles and Research
We give a generalization of the Beurling–Lax theorem both in the complex and quaternionic settings. We consider in the first case functions meromorphic in the right complex halfplane, and functions slice hypermeromorphic in the right quaternionic halfspace in the second case. In both settings we also discuss a unified framework, which includes both the disk and the halfplane for the complex case and the open unit ball and the halfspace in the quaternionic setting.
Ode To Applied Physics: The Intellectual Pathway Of Differential Equations In Mathematics And Physics Courses: Existing Curriculum And Effective Instructional Strategies, Brandon L. Clark
Honors College
The purpose of this thesis is to develop a relationship between mathematics and physics through differential equations. Beginning with firstorder ordinary differential equations, I develop a pathway describing how knowledge of differential equations expands through mathematics and physics disciplines. To accomplish this I interviewed mathematics and physics faculty, inquiring about their utilization of differential equations in their courses or research. Following the interviews I build upon my current knowledge of differential equations in order to reach the varying upperdivision differential equation concepts taught in higherlevel mathematics and physics courses (e.g., partial differential equations, Bessel equation, Laplace transforms) as gathered ...
2017 Petersheim Academic Exposition Schedule Of Events, Seton Hall University
2017 Petersheim Academic Exposition Schedule Of Events, Seton Hall University
Petersheim Academic Exposition
2017 Petersheim Academic Exposition
On A Class Of Quaternionic Positive Definite Functions And Their Derivatives, Daniel Alpay, Fabrizio Colombo, Irene Sabadini
On A Class Of Quaternionic Positive Definite Functions And Their Derivatives, Daniel Alpay, Fabrizio Colombo, Irene Sabadini
Mathematics, Physics, and Computer Science Faculty Articles and Research
In this paper, we start the study of stochastic processes over the skew field of quaternions. We discuss the relation between positive definite functions and the covariance of centered Gaussian processes and the construction of stochastic processes and their derivatives. The use of perfect spaces and strong algebras and the notion of Fock space are crucial in this framework.
The Poynting–Robertson Effect In The Newtonian Potential With A Yukawa Correction, Ioannis Haranas, Omiros Ragos, Ioannis Gkigkitzis, Ilias S. Kotsireas, Connor Martz, Sheldon Van Middekoop
The Poynting–Robertson Effect In The Newtonian Potential With A Yukawa Correction, Ioannis Haranas, Omiros Ragos, Ioannis Gkigkitzis, Ilias S. Kotsireas, Connor Martz, Sheldon Van Middekoop
Physics and Computer Science Faculty Publications
We consider a Yukawatype gravitational potential combined with the PoyntingRobertson effect. Dust particles originating within the asteroid belt and moving on circular and elliptic trajectories are studied and expressions for the time rate of change of their orbital radii and semimajor axes, respectively, are obtained. These expressions are written in terms of basic particle parameters, namely their density and diameter. Then, they are applied to produce expressions for the time required by the dust particles to reach the orbit of Earth. For the Yukawa gravitational potential, dust particles of diameter 10^{3 }m in circular orbits require times of the ...
Fast Multipole Method Using Cartesian Tensor In Beam Dynamic Simulation, He Zhang, He Huang, Rui Li, Jie Chen, LiShi Luo
Fast Multipole Method Using Cartesian Tensor In Beam Dynamic Simulation, He Zhang, He Huang, Rui Li, Jie Chen, LiShi Luo
Mathematics & Statistics Faculty Publications
The fast multipole method (FMM) using traceless totally symmetric Cartesian tensor to calculate the Coulomb interaction between charged particles will be presented. The Cartesian tensor based FMM can be generalized to treat other nonoscillating interactions with the help of the differential algebra or the truncated power series algebra. Issues on implementation of the FMM in beam dynamic simulations are also discussed. © 2017 Author(s).
Simulation Study On Jleic High Energy Bunched Electron Cooling, H. Zhang, Y. Roblin, Y. Zhang, Ya. Derbenev, S. Benson, R. Li, J. Chen, H. Huang, L. Luo
Simulation Study On Jleic High Energy Bunched Electron Cooling, H. Zhang, Y. Roblin, Y. Zhang, Ya. Derbenev, S. Benson, R. Li, J. Chen, H. Huang, L. Luo
Mathematics & Statistics Faculty Publications
In the JLab Electron Ion Collider (JLEIC) project the traditional electron cooling technique is used to reduce the ion beam emittance at the booster ring, and to compensate the intrabeam scattering effect and maintain the ion beam emittance during the collision at the collider ring. Different with other electron coolers using DC electron beam, the proposed electron cooler at the JLEIC ion collider ring uses high energy bunched electron beam, provided by an ERL. In this paper, we report some recent simulation study on how the electron cooling rate will be affected by the bunched electron beam properties, such as ...
ModeSum Prescription For The Vacuum Polarization In Odd Dimensions, Peter Taylor, Cormac Breen
ModeSum Prescription For The Vacuum Polarization In Odd Dimensions, Peter Taylor, Cormac Breen
Articles
We present a new modesum regularization prescription for computing the vacuum polarization of a scalar field in static sphericallysymmetric black hole spacetimes in odd dimensions. This is the first general and systematic approach to regularized vacuum polarization in higher dimensions. Remarkably, the regularization parameters can be computed in closed form in arbitrary dimensions and for arbitrary metric function $f(r)$. In fact, we show that in spite of the increasing severity and number of the divergences to be regularized, the method presented is mostly agnostic to the number of dimensions. Finally, as an explicit example of our method, we show ...
Exploring Mathematical Strategies For Finding Hidden Features In MultiDimensional Big Datasets, Tri Duong, Fang Ren, Apurva Mehta
Exploring Mathematical Strategies For Finding Hidden Features In MultiDimensional Big Datasets, Tri Duong, Fang Ren, Apurva Mehta
STAR (STEM Teacher and Researcher) Presentations
With advances in technology in brighter sources and larger and faster detectors, the amount of data generated at national user facilities such as SLAC is increasing exponentially. Humans have a superb ability to recognize patterns in complex and noisy data and therefore, data is still curated and analyzed by humans. However, a human brain is unable to keep up with the accelerated pace of data generation, and as a consequence, the rate of new discoveries hasn't kept pace with the rate of data creation. Therefore, new procedures to quickly assess and analyze the data are needed. Machine learning approaches ...
A ThreeFold Approach To The Heat Equation: Data, Modeling, Numerics, Kimberly R. Spayd, James G. Puckett
A ThreeFold Approach To The Heat Equation: Data, Modeling, Numerics, Kimberly R. Spayd, James G. Puckett
Math Faculty Publications
This article describes our modeling approach to teaching the onedimensional heat (diffusion) equation in a onesemester undergraduate partial differential equations course. We constructed the apparatus for a demonstration of heat diffusion through a long, thin metal rod with prescribed temperatures at each end. The students observed the physical phenomenon, collected temperature data along the rod, then referenced the demonstration for purposes in and out of the classroom. Here, we discuss the experimental setup, how the demonstration informed practices in the classroom and a project based on the collected data, including analytical and computational components.
Ogden College Of Science & Engineering Newsletter (Summer 2016), Cheryl Stevens, Dean
Ogden College Of Science & Engineering Newsletter (Summer 2016), Cheryl Stevens, Dean
Ogden College of Science & Engineering Publications
No abstract provided.
Why 3D Space? Why 10D Space? A Possible Simple Geometric Explanation, Vladik Kreinovich
Why 3D Space? Why 10D Space? A Possible Simple Geometric Explanation, Vladik Kreinovich
Departmental Technical Reports (CS)
In physics, the number of observed spatial dimensions (three) is usually taken as an empirical fact, without a deep theoretical explanation. In this paper, we provide a possible simple geometric explanation for the 3D character of the proper space. We also provide a simple geometric explanation for the number of additional spatial dimensions that some physical theories use. Specifically, it is known that for some physical quantities, the 3D space model with pointwise particles leads to meaningless infinities. To avoid these infinities, physicists have proposed that particles are more adequately described not as 0D points, but rather as 1D strings ...