Digital Commons Network^™

Studies Of Light Nuclei In Χeft: A Status Report, R. Schiavilla

Physics Faculty Publications

A status report on χEFT studies of few-nucleon electroweak structure and dynamics is provided, including electromagnetic form factors of few nucleon systems, the pp weak fusion and muon weak captures on deuteron and ³He, an a number of parity-violating processes induced by hadronic weak interactions

Advances In Theory Of Coherent Electron Cooling, Andrey Elizarov

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

The coherent electron cooling is a novel hadron beam cooling technique that is being developed at Brookhaven National Laboratory. It is a realization of the stochastic cooling, in which an electron beam is used in the modulator, amplifier and kicker. In the modulator, hadrons create electron density perturbations. Then these perturbations are amplified in the free electron laser, while hadrons pass through dispersion section, where they are placed such that, in the kicker, amplified perturbations' electric fields accelerate or decelerate hadrons, depending on their velocities, cooling the beam. In the present dissertation, we describe ways to model the modulator section …

Exact Results In Supersymmetric And Superconformal Quantum Field Theories, Wolfger Peelaers

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

In this dissertation we perform exact, non-perturbative computations in supersymmetric and superconformal quantum field theories. In the first part, we show that the conformal bootstrap equations, which implement the requirement that in a conformal quantum field theory any four-point function should be crossing symmetric, have an exactly solvable truncation in theories with extended supersymmetry. As a result, we introduce a new 4d/2d correspondence that assigns to any four-dimensional N =2 superconformal quantum field theory, Lagrangian or non-Lagrangian, a two-dimensional chiral algebra, and subsequently explore its structure in the context of theories of class S. In the second part, we extend …

Thinking Nature, "Pierre Maupertuis And The Charge Of Error Against Fermat And Leibniz", Richard Samuel Lamborn

USF Tampa Graduate Theses and Dissertations

The purpose of this dissertation is to defend Pierre Fermat and Gottfried Wilhelm Leibniz against the charge of error made against them by Pierre Maupertuis that they errantly applied final causes to physics. This charge came in Maupertuis’ 1744 speech to the Paris Academy of Sciences, later published in different versions, entitled Accord Between Different Laws Which at First Seemed Incompatible. It is in this speech that Maupertuis lays claim to one of the most important discoveries in the history of physics and science, The Principle of Least Action. From the date of this speech up until the end …

Serum Proteins Enhance Dispersion Stability And Influence The Cytotoxicity And Dosimetry Of Zno Nanoparticles In Suspension And Adherent Cancer Cell Models, Catherine B. Anders, Jordan J. Chess, Denise G. Wingett, Alex Punnoose

Biomedical Research Institute Publications and Presentations

Agglomeration and sedimentation of nanoparticles (NPs) within biological solutions is a major limitation in their use in many downstream applications. It has been proposed that serum proteins associate with the NP surface to form a protein corona that limits agglomeration and sedimentation. Here, we investigate the effect of fetal bovine serum (FBS) proteins on the dispersion stability, dosimetry, and NP-induced cytotoxicity of cationic zinc oxide nanoparticles (nZnO) synthesized via forced hydrolysis with a core size of 10 nm. Two different in vitro cell culture models, suspension and adherent, were evaluated by comparing a phosphate buffered saline (PBS) nZnO dispersion (nZnO/PBS) …

College Of Science And Mathematics Newsletter, Fall 2015, College Of Science And Mathematics, Wright State University

College of Science and Mathematics Newsletters

This 6 page newsletter discusses various happenings within the College of Science and Mathematics. It begins with a letter from the dean, and continues on with news, events, alumni news, and other community news.

Astr 103: Descriptive Astronomy Syllabus, Michael Sibbernsen

Department of Physics and Astronomy: Syllabi

Syllabus for ASTR 103 Descriptive Astronomy for Fall 2015 semester.

Astr 113: Life In The Universe Syllabus, Edward Schmidt

Department of Physics and Astronomy: Syllabi

Syllabus for ASTR 113 Life in the Universe for Fall 2015 semester.

Introduction To Physics, Soumitra Chattopadhyay, Jeffrey Linek

Physics and Astronomy Grants Collections

This Grants Collection for Introduction to Physics was created under a Round Two ALG Textbook Transformation Grant.

Affordable Learning Georgia Grants Collections are intended to provide faculty with the frameworks to quickly implement or revise the same materials as a Textbook Transformation Grants team, along with the aims and lessons learned from project teams during the implementation process.

Documents are in .pdf format, with a separate .docx (Word) version available for download. Each collection contains the following materials:

• Linked Syllabus
• Initial Proposal
• Final Report

Effective Microscopic Models For Sympathetic Cooling Of Atomic Gases, Roberto Onofrio, Bala Sundaram

Dartmouth Scholarship

Thermalization of a system in the presence of a heat bath has been the subject of many theoretical investigations especially in the framework of solid-state physics. In this setting, the presence of a large bandwidth for the frequency distribution of the harmonic oscillators schematizing the heat bath is crucial, as emphasized in the Caldeira-Leggett model. By contrast, ultracold gases in atomic traps oscillate at well-defined frequencies and therefore seem to lie outside the Caldeira-Leggett paradigm. We introduce interaction Hamiltonians which allow us to adapt the model to an atomic physics framework. The intrinsic nonlinearity of these models differentiates them from …

Stealth Assessment In Video Games, Val Shute

2009 - 2019 ACER Research Conferences

Games can be powerful vehicles to support learning, but their success in education hinges on getting the assessment part right. In this presentation, I will explore how games can use stealth assessment to measure and support the learning of competencies critical for the future. I will discuss what stealth assessment is, why it is important, and how to develop and accomplish it. I will also provide examples within the context of a game called Physics Playground that I designed and developed with my team. I’ll share what has been learned by recent research on stealth assessments in games, including: Does …

Non-Equilibrium Physics From An Inference Perspective, Valentin Walther

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

This thesis describes implications of inference logic and information theory on non-equilibrium physics. Inference logic prescribes a unique way of converting information about mean-values into probability assignments, which are applied to the physics of non-equilibrium systems. This thesis is structured in four chapters: First, the central theorems of information theory are derived from the basic requirements of any inference procedure. The theory, formulated to apply to physical equilibrium systems with mean-value constraints, is called Maximum Entropy (MaxEnt). This idea bridges the work of Shannon and Boltzmann and sets difficult concepts from statistical physics, such as ergodicity and metric transitivity, into …

Toward Analog Quantum Computing: Simulating Designer Atomic Systems, Jacob L. Bigelow, Veronica L. Sanford

Physics and Astronomy Summer Fellows

We use a magneto-optical trap to cool rubidium atoms to temperatures in the _µK range. On the _µs timescales of our experiment, the atoms are moving slowly enough that they appear stationary. We then excite them to a Rydberg state, where the outer electron is loosely bound. In these high energy states, the atoms can exchange energy with each other. Since the energy exchange depends on the separation and the relative orientation of the atoms, we can potentially control their interactions by controlling the spatial arrangements of the atoms. We model this system using simulations on a supercomputer …

The Role Of Blowing Snow In The Activation Of Bromine Over First-Year Antarctic Sea Ice, R. M. Lieb-Lappen, R. W. Obbard

Dartmouth Scholarship

It is well known that during polar springtime halide sea salt ions, in particular Br^-, are photochemically activated into reactive halogen species (e.g., Br and BrO), where they break down tropospheric ozone. This research investigated the role of blowing snow in transporting salts from the sea ice/snow surface into reactive bromine species in the air. At two different locations over first-year ice in the Ross Sea, Antarctica, collection baskets captured blowing snow at different heights. In addition, sea ice cores and surface snow samples were collected throughout the month-long campaign. Over this time, sea ice and surface snow …

Torque And Rotational Motion (11th Grade), Connor Gorman, Leslie Salazar

Understanding by Design: Complete Collection

The creation of the new AP Physics 1 course has introduced quite a few changes into the curriculum which have proven challenging for students. In particular, AP Physics 1 requires that students possess a deep, working knowledge of algebraic processes along with a sharp understanding of physics concepts which can be utilized in tandem to solve a wide array of problems given from many different perspectives. Within the angular dynamics unit, students must incorporate what has proven to be an incredibly difficult series of physics concepts into this repertoire. This unit was written to help with the process students must …

Models Of Time Travel And Their Consequences, Antonio M. Mantica

Oglethorpe Journal of Undergraduate Research

How do we travel through time? We know that we can move forward in it (we have no choice), but can we jump forward in time? Can we go backward in time? It also gives rise to other troubling questions: is time measurable in distinct increments, or does it flow continuously? In "Models of Time Travel and their Consequences," Antonio Mantica walks the reader through current understandings of how time functions in Einstein's universe and proposes three distinct models to explain it. Following that, he provides a list of experiments to credit or discredit the models. Appropriate for audiences of …

Electron Transmission Through Micrometer Sized Funnelshaped Tapered Glass Capillaries And Electron Micro-Beam Production, Samanthi Jayamini Wickramarachchi

Dissertations

The prime motivation of this work is to understand the fundamental transmission process of an electron beam through a funnel-shaped capillary taking into account its shape together with the energy, angular and time dependence of the transmitted electrons produce a microsized electron beam. The utilized capillaries had inlet/outlet diameters of 800/16 μm, 800/100 μm and lengths of 35 mm. Considerable transmission of 800 and 1000 eV electrons for tilt angles up to 1.5^o and only small transmission for 500 eV electrons was observed for the capillary with the smaller outlet diameter of 16 μm. Incident electrons with energies of …

The Skatepark Mathematics Extravaganza, William Robertson

Selected Works Temporary Series

In the fall of 2014, a series of live demonstrations and field-based activities were lead by a team of educators and top action sports athletes who performed at local high schools. These events, entitled the “Skatepark Mathematics Extravaganza”, were done in order to engage high school students in focused explorations of mathematics set in a real world setting that is relevant to youth culture, namely skateboarding and bicycle motocross (BMX). These activities incorporated mathematics for the students to do after the demonstration in meetings with classes in which the Action Science Stunt Team performed maneuvers on ramps at the high …

The Skatepark Mathematics Extravaganza, William Robertson

Departmental Papers (TE)

In the fall of 2014, a series of live demonstrations and field-based activities were lead by a team of educators and top action sports athletes who performed at local high schools. These events, entitled the “Skatepark Mathematics Extravaganza”, were done in order to engage high school students in focused explorations of mathematics set in a real world setting that is relevant to youth culture, namely skateboarding and bicycle motocross (BMX).  These activities incorporated mathematics for the students to do after the demonstration in meetings with classes in which the Action Science Stunt Team performed maneuvers on ramps at the high …

Integrating Formative Assessment Into Physics Instruction: The Effect Of Formative Vs. Summative Assessment On Student Physics Learning And Attitudes, Chaiphat Plybour

Dissertations

Of many instructional strategies used to improve teaching and learning in science, formative assessment is potentially one of the most effective. A central feature is timely feedback during learning, giving students the opportunity to benefit and improve while also enabling teachers to adjust instruction to learner needs. By contrast, conventional assessment tends to be mostly summative, assigning point scores, grading and ranking students, and providing extrinsic motivation. For maximum effectiveness in enhancing learning, formative assessment should be designed into instruction from the start rather than being an add-on. This project comprised development, teaching, and research aspects. Two physics topic modules, …

Schwarzschild Spacetime And Friedmann-Lemaitre-Robertson-Walker Cosmology, Zachary Cohen

Honors Scholar Theses

The advent of General Relativity via Einstein's field equations revolutionized our understanding of gravity in our solar system and universe. The idea of General Relativity posits that gravity is entirely due to the geometry of the universe -- that is, the mass distribution throughout the universe results in the "curving" of spacetime, which gives us the physics we see on a large scale. In the framework of General Relativity, we find that the universe behaves differently than was predicted in the model of gravitation developed by Newton. We will derive the general relativistic model for a simple system near a …

Gravitational Wave Background In The Quasi-Steady State Cosmology, Sree Ram Valluri, Sayantan Auddy, J V. Narlikar, S V. Dhurandhar, R G. Vishwakarma

Physics and Astronomy Publications

This paper calculates the expected gravitational wave background (GWB) in the quasi-steady state cosmology (QSSC). The principal sources of gravitational waves in the QSSC are the mini-creation events (MCE). With suitable assumptions the GWB can be computed both numerically and with analytical methods. It is argued that the GWB in QSSC differs from that predicted for the standard cosmology and a future technology of detectors will be able to decide between the two predictions. We also derive a formula for the flux density of a typical extragalactic source of gravitational waves.

Quantum And Photon Revolution, Raymond C.H. Ooi

Archival Material (2010s)

No abstract provided.

Measuring The Hyperfine Splittings Of Lowest Energy Atomic Transitions In Rubidium, Benjamin D. Graber

Undergraduate Honors Thesis Projects

The goal of this experiment was to measure the hyperfine energy splittings of the ground to first excited state transitions in rubidium using saturated absorption spectroscopy. Using this technique, we measured these transition energy spectra by taking the difference of two photodiode outputs due to multiple beams of a single laser scanned over a range of frequencies and shone through a cell of Rb vapor. When the laser frequency was resonant with an atomic transition, photons of those frequencies were absorbed, leaving a dip in intensity of the beam measured at the photodiode. One of the two laser beams had …

Physics Alumni Newsletter Spring 2015, Terry Goforth

Physics Alumni Newsletter

Physics Alumni Newsletter

The Physics Alumni Newsletter is produced by the SWOSU Physics Department.

Our Engineering Physics students are recruited in fields such as electronics, aerospace, mechanical engineering, petroleum engineering and software engineering. Graduates also have careers in meteorology, architecture, education and more.

Visualizing Relationships Between Related Variables: Improving Physics Education Through D3.Js Network Visualizations, Stephanie Friend

Liberal Arts and Engineering Studies

phiMap is a web application started by Cal Poly professors and students to aid professors in teaching physics. I developed Javascript visualizations for phiMap that serve to simplify the processes of both teaching and learning physics. These visualizations aim to present relationships between physics variables in an easy to understand manner, and they could eventually have a huge impact on physics education.

Dual-Spacecraft Reconstruction Of A Three-Dimensional Magnetic Flux Rope At The Earth's Magnetopause, H. Hasegawa, B. U. Ö. Sonnerup, S. Eriksson, T. K. M. Nakamura

Dartmouth Scholarship

We present the first results of a data analysis method, developed by Sonnerup and Hasegawa (2011), for reconstructing three-dimensional (3-D), magnetohydrostatic structures from data taken as two closely spaced satellites traverse the structures. The method is applied to a magnetic flux transfer event (FTE), which was encountered on 27 June 2007 by at least three (TH-C, TH-D, and TH-E) of the five THEMIS probes near the subsolar magnetopause. The FTE was sandwiched between two oppositely directed reconnection jets under a southward interplanetary magnetic field condition, consistent with its generation by multiple X-line reconnection. The recovered 3-D field indicates that a …

07. Criminal Justice, Northeastern State University

Oklahoma Research Day Abstracts

No abstract provided.

06. Computer Science, Northeastern State University

Oklahoma Research Day Abstracts

No abstract provided.

03. Biology, Northeastern State University

Oklahoma Research Day Abstracts

No abstract provided.