Miracles, 2018 Olivet Nazarene University
Miracles, Cassi Bossong
The Prospect Of Human Spiritual Unity Through The Cosmic Story, 2018 Department of Religion and Philosophy, Dominican University of California
The Prospect Of Human Spiritual Unity Through The Cosmic Story, Philip Novak
Collected Faculty and Staff Scholarship
Thomas Berry and Brian Swimme have noted that, “we seem to be moving beyond any religious expression so far known to the human into a meta-religious age that seems to be a new comprehensive context for all religions.” That “new comprehensive context” is of course now known as Big History -- a.k.a. the Evolutionary Epic, Universe Story, or New Cosmic Story—the astonishing contemporary synthesis of modern sciences that tells a coherent story of the evolution of the universe from the Big Bang 13.7 billion years ago to the present.
Yet with the notable exception of the writings ...
Detection Of Survival And Proliferation Of Sulfate Reducers Under Simulated Martian Atmospheric And Soil Conditions, 2017 University of Arkansas, Fayetteville
Detection Of Survival And Proliferation Of Sulfate Reducers Under Simulated Martian Atmospheric And Soil Conditions, Sergio Mosquera Mora
Theses and Dissertations
Numerous studies have tried to determine the survivability and proliferation of microorganisms under simulated Martian conditions. Furthermore, most of them have been focused on the ability of these microbes to cope with high brines’ salt (NaCl) concentrations inherent of the Martian surface. However, there are not studies related to the ability of bacteria to survive on subsurface environments that have increasing concentrations of sulfate compounds. For this research, a group of microorganisms known as sulfate-reducing bacteria or simply sulfate reducers were chosen due to their ability to use sulfate compounds as terminal electron acceptors to produce metabolic energy, their tolerance ...
Energy From Active Galactic Nuclei And The Effects On Host Spiral Galaxies, 2017 University of Arkansas, Fayetteville
Energy From Active Galactic Nuclei And The Effects On Host Spiral Galaxies, Amanda Schilling
Theses and Dissertations
I have investigated the energy output of active galactic nuclei (AGN) in order to understand how these objects evolve and the impact they may have on host galaxies. First, I looked at a sample of 96 AGN at redshifts $z \sim 2, 3,$ and $4$ which have imaging and thus luminosity measurements in the $griz$ and $JHK$ observed wavebands. For these galaxies, I have co-epochal data across those bands which accounted for variability in AGN luminosity. I used the luminosity measurements in the five bands to construct spectral energy distributions (SED) in the emitted optical-UV bands for each AGN. I ...
Knotty Inflation And The Dimensionality Of Spacetime, 2017 University of Edinburgh
Knotty Inflation And The Dimensionality Of Spacetime, Arjun Berera, Roman V. Buniy, Thomas W. Kephart, Heinrich Päs, João G. Rosa
Mathematics, Physics, and Computer Science Faculty Articles and Research
We suggest a structure for the vacuum comprised of a network of tightly knotted/linked flux tubes formed in a QCD-like cosmological phase transition and show that such a network can drive cosmological inflation. As the network can be topologically stable only in three space dimensions, this scenario provides a dynamical explanation for the existence of exactly three large spatial dimensions in our Universe.
Quantum Physics And Relativity In Lovecraft's Fiction, 2017 Ursinus College
Quantum Physics And Relativity In Lovecraft's Fiction, Garrison Mccammon
English Summer Fellows
The early twentieth century brought about some of the best and most influential horror or weird tales ever written in the English speaking world. The most impressive and most lauded author of the group composed of such figures as Algernon Blackwood, M. R. James, Arthur Machen, Clark A. Smith, and Robert E. Howard was H. P. Lovecraft. Posthumously declared the literary successor to Edgar Allan Poe, Lovecraft’s fiction and tales of terror have cast such a huge shadow that every significant author in weird writing since his passing has claimed him as a literary heir. Lovecraft’s works were ...
Investigating Brown Dwarf Atmospheres: Gravity, Dust Content, Cloud Structure And Metallicity, 2017 The University of Western Ontario
Investigating Brown Dwarf Atmospheres: Gravity, Dust Content, Cloud Structure And Metallicity, Kendra Kellogg
Electronic Thesis and Dissertation Repository
Brown dwarfs are the lowest mass products of star formation. Their low masses don't allow them to sustain, or sometimes even begin, the thermonuclear processes that provide stars with internal energy and the thermal pressure necessary to maintain hydrostatic equilibrium. Thus, their radii and effective temperatures decrease as they age, continually changing their spectral classification. However, it is now a well-known fact that the spectral appearance of ultra-cool dwarfs is governed by more than just temperature. Factors such as gravity, metallicity and cloud distribution play an important role in the structure and composition of ultra-cool dwarf atmospheres and ultimately ...
Characterizing Cool Brown Dwarfs And Low-Mass Companions With Low-Resolution Near-Infrared Spectra, 2017 The Graduate Center, City University of New York
Characterizing Cool Brown Dwarfs And Low-Mass Companions With Low-Resolution Near-Infrared Spectra, Paige Godfrey
All Dissertations, Theses, and Capstone Projects
Exoplanet direct detections are reaching the temperature regime of cool brown dwarfs, motivating further understanding of the coolest substellar atmospheres. These objects, T and Y dwarfs, are numerous and isolated in the field, thus making them easier to study in detail than objects in companion systems. Brown dwarf spectral types are derived from spectral morphology and generally appear to correspond with decreasing mass and effective temperature (Teff). However, spectral subclasses of the colder objects do not share this monotonic temperature correlation, indicating that secondary parameters (gravity, metallicity, dust) significantly influence spectral morphology. These secondary atmospheric parameters can provide insight ...
Gravitational Wave Behavior At A Vacuum-Matter Interface, 2017 University of Puget Sound
Gravitational Wave Behavior At A Vacuum-Matter Interface, Jake Litterer
Honors Program Theses
In classical electrodynamics, boundary conditions of the E and B fields are derived from Maxwell's equations, which are used to derive the Fresnel equations describing the behavior of a wave at an interface between media with given indices of refraction. Though electrodynamics and gravity are in some instances strikingly analogous, boundary conditions in general relativity are somewhat more opaque. We will see that while while continuity of the metric must be true in general, discontinuity of the extrinsic curvature of spacetime, while allowed by the Einstein field equations, results in a singularity in the energy-momentum tensor. This singularity is ...
Accuracy And Stability Of Integration Methods For Neutrino Transport In Core Collapse Supernovae, Kyle A. Gregory
University of Tennessee Honors Thesis Projects
No abstract provided.
Have We Found Our Neighbors? The Search For Habitable Planets Outside Our Solar System, 2017 Duquesne University
Have We Found Our Neighbors? The Search For Habitable Planets Outside Our Solar System, Madeline Galbraith
No abstract provided.
Detection And Characterization Of Extrasolar Planets Through Planet-Disk Dynamical Interactions, 2017 The University of Western Ontario
Detection And Characterization Of Extrasolar Planets Through Planet-Disk Dynamical Interactions, Maryam Tabeshian
Electronic Thesis and Dissertation Repository
Structures observed in circumstellar disks may be caused by gravitational interaction with planetary or stellar companions. These perturbed disks are often signposts of planet birth in exoplanetary systems, and offer insights into the properties of both the disk and the perturbing planets. Therefore, structures observed in these disks provide a powerful tool for detecting and studying extrasolar planetary systems. In this work, we examine the link between disk structures and nearby/embedded planets using numerical simulations of both hypothetical and observed disk systems.
We demonstrate that gaps can be opened in dynamically cold debris disks at the mean-motion resonances (MMRs ...
Fermi-Lat Daily Monitoring Observations Of The Microquasar Cygnus X-1, 2017 Georgia College and State University
Fermi-Lat Daily Monitoring Observations Of The Microquasar Cygnus X-1, Austin P. Waldron, Stephen R. Hood, Arash Bodaghee
Georgia College Student Research Events
Detection of gamma-ray emission from microquasars is important for understanding particle acceleration in the jet, and for constraining leptonic/hadronic emission models. We present a continuation of a 1-d likelihood analysis on gamma-ray observations by Fermi-LAT (0.1-10 GeV) of the accreting black hole candidate Cygnus X-1. Combining this gamma-ray data with available X-ray monitoring data from Swift and MAXI allowed us to reveal over a dozen days (in 2008-2016) during which Cyg X-1 displayed low-significance (3-4 sigma) excesses, many of which were contemporaneous with apparent transitions in the X-rays.
Diffuse Gamma-Ray Emission From Nearby Molecular Clouds As A Probe Of Cosmic Ray Density Variations, 2017 Graduate Center, City University of New York
Diffuse Gamma-Ray Emission From Nearby Molecular Clouds As A Probe Of Cosmic Ray Density Variations, Ryan Abrahams
All Dissertations, Theses, and Capstone Projects
We analyze gamma-ray emission from nearby, interstellar molecular clouds in order to calibrate current tracers of the interstellar medium and to probe local cosmic ray gradients. Gamma-rays detected by the Fermi Gamma-ray Space Telescope are created when cosmic rays collide with atomic nuclei in the interstellar medium, and thus provide a unique, unbiased view of the distribution of gas. The gamma-ray flux per proton in the interstellar medium, also known as the gamma-ray emissivity, contains information about the density of high energy cosmic rays. These cosmic rays are born in supernovae shock waves and diffuse throughout the Galaxy. The cosmic ...
Alignment Of The Western And Eastern Passage Tombs At Knowth Tomb 1, 2017 Dublin Institute of Technology
Alignment Of The Western And Eastern Passage Tombs At Knowth Tomb 1, Frank Prendergast, Tom Ray
This report presents a summary account of two surveys undertaken by the authors to determine and interpret the alignments of the western and eastern passage tombs at Knowth, Co. Meath. The findings indicate that contrary to earlier suggestions, the eastern passage and the western passage (inner and outer) are not aligned towards sunrise and sunset respectively at the period of the vernal and autumnal equinoxes.
Conference Review ‘’The Astronomy In Skyscapes - Archaeoastronomy Beyond Alignments’’. Full Day Session At The National Astronomy Meeting, University Of Nottingham (United Kingdom), 27th June–1st July, 2016, 2017 Dublin Institute of Technology
Conference Review ‘’The Astronomy In Skyscapes - Archaeoastronomy Beyond Alignments’’. Full Day Session At The National Astronomy Meeting, University Of Nottingham (United Kingdom), 27th June–1st July, 2016, Frank Prendergast
The National Astronomy Meeting (NAM) of the Royal Astronomical Society (RAS) was held at the University of Nottingham Jubilee Campus on 27th June–1st July, 2016. This event is the primary annual scientific conference for astronomers and space scientists drawn mainly from the UK and Ireland. It is sponsored and coordinated by RAS. NAM 2016 had eight plenary talks spanning topics from planets to cosmology. Additionally, there were 60 parallel sessions broadly split into five themes, one of which was archaeoastronomy. This was the third successive NAM conference to feature a parallel session on archaeoastronomy, and was organised and chaired ...
Intergalactic Hi And Ovi: A Survey Of 259 Low-Z Cos Absorbers With Reference To Ionization Mechanics, 2017 University of Colorado, Boulder
Intergalactic Hi And Ovi: A Survey Of 259 Low-Z Cos Absorbers With Reference To Ionization Mechanics, Shannon Osborne
Undergraduate Honors Theses
Modern astrophysics still lacks a strong understanding of the Intergalactic Medium (IGM), particularly the Warm-Hot Intergalactic Medium (WHIM; T = 105 – 107 K). To better understand the distribution and temperature of this gas, absorption-line observations along AGN sight lines from the Cosmic Origins Spectrograph onboard the Hubble Space Telescope (COS/HST) were analyzed (see Danforth et al. 2016). Here we present the largest analysis to date of IGM systems detected in both HI and OVI: 259 absorbers along 52 sight lines. We separate these systems into aligned and non-aligned categories based on the velocity separation of the HI and ...
Observations And Light Curve Analysis Of Transiting Extra-Solar Planets, 2016 Stephen F Austin State University
Observations And Light Curve Analysis Of Transiting Extra-Solar Planets, Clark M. Holcomb
Electronic Theses and Dissertations
The purpose of this research was to perform the procedures to study transiting exoplanets in their entirety, from the data collection process to determining physical characteristics and orbital properties. The research was conducted with two telescopes of different sizes (16” and 12”) at multiple sites in order to refine the detection process. Both Maxim DL and Mira Pro x64 software were used to process the resulting images. The PHOEBE program was used to model the data to determine the properties of the exoplanets, which were then compared to the results obtained by other astronomers. The data collection process as well ...
Commercial Space Situational Awareness (Ssa) Capabilities And Their Benefits For Civilian Space Traffic Management (Stm), Mark A. Skinner
Space Traffic Management Conference
Paralleling (but lagging) satellite development, SSA, long the sole domain of sophisticated militaries, now includes commercial providers. These commercial capabilities, identified as beneficial to the sustainable use of outer space, have demonstrated technical sophistication sufficient to positively contribute to the mitigation of satellite interference and provide actionable SSA information. Utilizing small optical telescopes, these entities are able to determine the orbits of objects in the geosynchronous orbit (GSO) to sizes as small as 1 m2, with measured positional uncertainties of 10s of meters, on the order of the size of a modern communications satellite. These techniques can benefit ...
High Power Optically Pumped Semiconductor Lasers For Sodium Guidestar Applications, 2016 University of New Mexico
High Power Optically Pumped Semiconductor Lasers For Sodium Guidestar Applications, Shawn W. Hackett
Optical Science and Engineering ETDs
Optically pumped semiconductor lasers (OPSLs) are shown to provide a much more compact and less expensive source for illumination of the sodium layer of the mesosphere for use as a sodium laser guidestar via single and two photon excitation schemes. This represents a revolution in laser guidestar technology as the cost, size, and power requirements for a laser guidestar system are shown to have been decreased by an order of magnitude with guidestar performance shown to be similar to previous sources. Sodium laser guidestar sources for broadband simultaneous illumination of multiple lines are developed and simulated. Simulations are then compared ...