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Study Of The Reactions E+E−→2(ΠEΠ−)Π0Π0Π0 And 2(Π+Π−)Π0Π0Η At Center-Of-Mass Energies From Threshold To 4.5 Gev Using Initial-State Radiation, J. P. Lees, V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, D. N. Brown, Yu. G. Kolomensky, M. Fritsch, H. Koch, T. Schroeder, R. Cheaib, C. Hearty, T. S. Mattison, J. A. Mckenna, R. Y. So, V. E. Blinov, A. R. Buzykaev, Milind Purohit, Et. Al.

Faculty Publications

We study the processes e⁺e⁻→2(π⁺π⁻)π⁰π⁰π⁰γ and 2(π⁺π⁻)π⁰π⁰ηγ in which an energetic photon is radiated from the initial state. The data were collected with the BABAR detector at SLAC. About 14 000 and 4700 events, respectively, are selected from a data sample corresponding to an integrated luminosity of 469  fb⁻¹.The invariant mass of the hadronic final state defines the effective e⁺e⁻ center-of-mass energy. The center-of-mass energies range from threshold to 4.5 GeV. From …

Analysis Of Waveform Distortions Produced By Interferometer Response Functions For Future Searches Of Gravitational-Wave Signals From Core-Collapse Supernovae, Anton Gribovskiy

Physics Dissertations - Archive

Multi-messenger astronomy recently added a fundamentally new component to its wide array of observational tools: a gravitational-wave detector. A number of binary black holes mergers have already been detected by gravitational-wave interferometers and the data have been analyzed by the scientific community. Moreover, simultaneous observation of gravitational waves with electromagnetic signals led to the first observation of a binary neutron star merger. Success in gravitational-wave detection motivated the efforts to improve current detectors and initiated the design of future detectors with significantly enhanced sensitivities. The detector improvements will lead to increase of the detection range for binary star mergers and …

Design And Control Of A Peristaltic Pump To Simulate Left Atrial Pressure In A Conductive Silicone Model, Jeremy Collins

Mechanical Engineering Undergraduate Honors Theses

According to the CDC, atrial fibrillation is responsible for more than 454,000 hospitalizations and approximately 158,000 deaths per year. A common treatment for atrial fibrillation is catheter ablation, a process in which a long flexible tube is guided through the femoral artery and to the source of arrhythmia in the heart, where it measures the electrical potential at various locations and converts problematic heart tissue to scar tissue via ablation. This paper details the design and control of a low-cost ($400) peristaltic pump system using repetitive control to replicate blood pressure in the left atrium in a conductive silicone model …

A Fully-Automated, Deep Learning-Based Framework For Ct-Based Localization, Segmentation, Verification And Planning Of Metastatic Vertebrae, Tucker Netherton, Tucker James Netherton

Dissertations and Theses (Open Access)

Palliative radiotherapy is an effective treatment for the palliation of symptoms caused by vertebral metastases. Visible evidence of disease is localized on medical images as part of the treatment planning process. However, complicating factors such as time pressures, anatomic variants in the spine, and similarities in adjacent vertebrae are associated with wrong level treatments of the spine. In addition, erroneous manual contouring of anatomic structures is a major failure mode in radiotherapy treatment planning.

The purpose of this study is to mitigate the challenges associated with treatment planning of the spine by automating the treatment planning process for three-dimensional conformal …

A Study Of The Frustrated Honeycomb Battery Material Na2ni2teo6, Nathan Christopher Episcopo

Open Access Theses & Dissertations

The P2-type layered hexagonal compound Na2Ni2TeO6 with Ni2+ on a honeycomb lattice was synthesized by the standard solid-state route. Structural characterization chemical phase purity was confirmed by Rietveld refinement of laboratory and synchrotron data. The crystal structure refines well in the P63/mcm space group. Single crystal growth trials using the self-flux-melt method were conducted with limited success. The magnetic transition temperature pertaining to Ni2+ lattice was confirmed by analysis of specific heat capacity to be . The magnetic susceptibility remains largely unchanged in magnetic field of and external pressure of . There is an almost linear response in isothermal magnetization …

Study Of Neutral Hadron Production In A High Intensity Particle Physics Experiment., Jake W. Berg

Electronic Theses and Dissertations

In this dissertation I present independent measurements of the multiplicities, R, of π⁰ and η mesons produced in annihilation interactions of electrons and positrons at a center-of-mass energy of 10.54 GeV. Data were collected using the BaBar detector at the PEP-II storage rings located at the SLAC National Accelerator Laboratory in Menlo Park, California. Both mesons have a decay mode to two photons, which is used to identify them and measure their production per event. I find R(π⁰) = 2.8±0.3 per event and R(η) = 0.25±0.03 per event. I also present my contributions to …

Study Of Static And Dynamical Properties Of Complex Antiferroelectrics Materials, Kinnary Yogeshbhai Patel

Graduate Theses and Dissertations

The aim of this dissertation is the investigation of the static and dynamical properties of the complex antiferroelectric materials using Effective Hamiltonian method and First principles calculations. In chapter 3, a novel elemental interatomic coupling in perovskite materials which bilinearly couples the antiferroelectric displacements of cations with the rotations of the oxygen octahedra. This new coupling explains a very complex crystal structure of prototypical antiferroelectric PbZrO3. My explanation provides a unified description of many other complex antipolar crystal structures in variety of perovskite materials, including the occurrence of incommensurate phases in some of them. In chapter 4, results and analysis …

Numerical Modeling For Patch Antennas, Luis Mario Bres Castro

Theses and Dissertations

This thesis will focus on creating a number of designs that will be tested in a simulation environment using an electromagnetic solver software called Computer Simulation Technology(CST) as well as we are going to develop our own model to be able to simulate more complex design due to the limitations of CST licensing. The simulations will help us optimize the parameters of gain-frequency allocation for future projects of antenna building. After doing a parametric study of a patch antenna we will develop a model for the return signal of a signal patch antenna, we will present four potential models. The …

Learning The Chain Fountain In Steady State Motion, Mark Ddamulira

Honor’s College Freeman Research Journal

A chain of metallic balls or spheres leaps over and above the rim of a container in which it rests tracing a path like a fountain when one end of the chain is given a push towards the ground. This interesting phenomenon was discovered by Steve Mould to describe at atomic level what happens to the molecules in a self-siphoning fluid. However, to his surprise, the chain of beads did not flow over the rim of the container as the self-siphoning fluid did.

But why does this chain do this and what forces cause this fountain? Propositions for the origin …

Measurement Of The Top Quark Mass Using Leptonic Observables In Tt Events Produced In Pp Collisions At Sqrt S = 13 Tev With The Cms Experiment At The Lhc, Mark Douglas Saunders

Theses and Dissertations

A novel method is presented for the measurement of the top-quark mass using only leptonic observables in tt events produced in pp collisions at SQRT(s)= 13 TeV.Data, corresponding to an integrated luminosity of 35.9 fb−1, were collected with the CMS detector during LHC Run II in 2016. The measurement uses the top-quark mass dependence of multiple kinematic distributions comprised from the dilepton eμ final state of tt events. The top-quark mass dependence of each kinematic distribution is calibrated using events generated with a NLO Monte Carlo simulation, and for the first time, with a second simulation that includes the exact …

Memory Module Design For High-Temperature Applications In Sic Cmos Technology, Affan Abbasi

Graduate Theses and Dissertations

The wide bandgap (WBG) characteristics of SiC play a significant and disruptive role in the power electronics industry. The same characteristics make this material a viable choice for high-temperature electronics systems. Leveraging the high-temperature capability of SiC is crucial to automotive, space exploration, aerospace, deep well drilling, and gas turbines. A significant issue with the high-temperature operation is the exponential increase in leakage current. The lower intrinsic carrier concentration of SiC (10-9 cm-3) compared to Si (1010 cm-3) leads to lower leakage over temperature. Several researchers have demonstrated analog and digital circuits designed in SiC. However, a memory module is …

Quantum Dynamical Phenomena In Non-Hermitian And Magnomechanical Systems, Saeid Vashahri Ghamsari

Graduate Theses and Dissertations

In this dissertation, we have investigated quantum dynamics via three case studies. First, we studied a system of two coupled waveguides respectively carrying optical damping and optical gain in addition to squeezing elements in one or both waveguides. Such a system is expected to generate highly entangled light fields in the two waveguides. We, however, show that the degree of the created entanglement is significantly affected by the quantum noises associated with the amplification and dissipation. Because of the noise effect, one can only have nonzero entanglement for a limited time interval. Second, we generalized the first project by considering …

Non-Gaussian Measurements Of Coherent States Of Light For Metrology And Communication, Matthew Dimario

Physics & Astronomy ETDs

Conventional measurement technology is unable to extract the most amount of information possible from coherent states of light. Non-Gaussian measurements which can count individual photons can surpass the sensitivity limits of ideal conventional strategies, and approach the ultimate limits achievable given by quantum mechanics. This thesis presents investigations and demonstrations of these unconventional measurements, which utilize coherent operations and single photon counting. This thesis shows that non-Gaussian measurements can outperform conventional strategies in estimation tasks as well as a variety of communication problems. This thesis also investigates novel approaches and algorithms for building robustness to static and dynamic noise which …

Point Absorbers In Advanced Ligo, Aidan F. Brooks, Gabriele Vajente, Hiro Yamamoto, R. Abbott, C. Adams, R. Adhikari, A. Ananyeva, S. Appert, K. Arai, Karla E. Ramirez

Physics & Astronomy Faculty Publications

Small, highly absorbing points are randomly present on the surfaces of the main interferometer optics in Advanced LIGO. The resulting nanometer scale thermo-elastic deformations and substrate lenses from these micronscale absorbers significantly reduce the sensitivity of the interferometer directly though a reduction in the power-recycling gain and indirect interactions with the feedback control system. We review the expected surface deformation from point absorbers and provide a pedagogical description of the impact on power buildup in second generation gravitational wave detectors (dual-recycled Fabry-Perot Michelson interferometers). This analysis predicts that the power-dependent reduction in interferometer performance will significantly degrade maximum stored power …

Two Developments For Efficient And Accurate Density Functional Theory Calculations, Zachary John Buschmann

Open Access Theses & Dissertations

Density functional theory (DFT) has long been the workhorse of quantum chemists and materials scientists. As the ability of modern DFT codes to address larger and more complex molecular systems has grown, so too has the computational cost, with cutting edge simulations requiring thousands of hours of wall time on the worldâ??s fastest supercomputers.For this reason, efficiency in both memory and time is critical at every step of the process. In fact, the increasing scope of physical systems that can be modeled is as much a function of computational elegance as of the physical fidelity of the simulation. The continuing …

Machine Learning Optimizes A Survey Of Dark Energy, Steven Karst

Undergraduate Research Conference at Missouri S&T

Measuring the history of cosmic expansion via the Baryon Acoustic Oscillation (BAO) scale from a three-dimensional galaxy map is a well established technique to probe the nature of dark energy. In fact, a forthcoming galaxy redshift survey, the Subaru Prime Focus Spectrograph (PFS), is designed mainly for this purpose. An essential optimization problem in such galaxy redshift surveys is the target selection. Namely, it is not clear how we should select our targets to maximize the number of galaxies which provide successful redshift measurement in a desired cosmic epoch, while avoiding other galaxies. Taking PFS as an example, we apply …

Improving Skills In Computer Methods: Introductory Toolkit To Python For Undergraduate Physics Majors, Erin O'Donnell, Melissa Rasmussen

Physics Capstone Projects

The computer-based curriculum for undergraduate physics students before 2019 struggled to stay current and applicable. When the course was created in the early 2000s, MathCad was used daily by many physicists. As computer’s and their computational abilities have grown exponentially, so have programming languages and applications. Now in the late 2010s/early 2020s, Excel, Python, and Mathematica are some of the most common computer appliques. To address this, we created toolkits to give undergraduate physicists the experience for future classes, careers, and graduate school. This paper focuses on the process for creating the Python toolkit and overall class setup. Run on …

382— Wiyn Open Cluster Study: Ubvri Photometry Of Ngc 2204, Kylie Snyder, Dante Scarazzini

GREAT Day Posters

The purpose of this project was to study the open star cluster NGC2204 using images taken at Kitt Peak National Observatory using the WIYN 0.9m telescope. These images were analyzed photometrically with the intention of determining the reddening, metallicity, age, and distance modulus of the star cluster. Each image was analyzed using software that determined the point spread function and applied that function to determine the magnitude of each star in that image. These magnitudes were taken for each filter, UBVRI, and then combined and averaged to create a single catalog. Standard stars, taken on the same night, were used …

Single-Neutron States In 51ti Via Neutron Transfer Reaction To 50ti, Jessica Nebel-Crosson

Physics and Astronomy Honors Papers

My project clarifies previous measurements made for the high excitation states of titanium isotopes, specifically ⁵¹Ti. We used a single-neutron transfer reaction from a deuterium source and measured the energy difference between the initial energy of the deuterium source, the transferred neutron, and the free proton. Our analysis included creating angular distribution plots of the proton momentum and the loose assignments of the single-particle state nature for each excitation state. We took these measurements via the Super-Enge Split-Pole Spectrograph at Florida State University.