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Articles 1 - 9 of 9
Full-Text Articles in Physical Sciences and Mathematics
Measuring The Night Sky Brightness Of Butler University, Austin Thomas Jacks
Measuring The Night Sky Brightness Of Butler University, Austin Thomas Jacks
Undergraduate Honors Thesis Collection
Light pollution has had a significant impact on ground-based telescope observations in recent years. As the night sky brightness continues to increase, astronomers are looking for new ways to combat this growing problem. According to the International Dark Sky Association (IDA), “An important part of solving the problem of light pollution is to have a thorough understanding of its magnitude, and a great way to do that is to measure the brightness of the night sky” [1]. The night sky brightness of surrounding Butler University is measured using the Holcomb Observatory 0.95-meter Cassegrain telescope. Different types of filters were used …
Constraining The Parameters Of Six Known Transiting Exoplanets, Mackenzie Lee Jones
Constraining The Parameters Of Six Known Transiting Exoplanets, Mackenzie Lee Jones
Undergraduate Honors Thesis Collection
We present two new transits of GJ~1214b, five of TrES-lb, two of XO~2b, and one each of TrES~3b)WASP-16b and WASP- 36b. These observations were made with multiple observatories including IRTF-MORIS, Butler University's Holcomb Observatory, SARA-KPNO, and SARA-eTIO. Due to poor conditions and a lack of good comparison stars within the field of view, the parameter values for the radius ratio, inclination, and orbital distance, found for GJ-1214b are not reliable. The timing values, while still suspect, suggest consistency with the current ephemeris. After further analysis, the radius ratio we found for TrES-1b in Sloan r' is 0.0.13501±0.0001l, which differs by …
Quantum Diffusion-Limited Aggregation, David Bradley Johnson
Quantum Diffusion-Limited Aggregation, David Bradley Johnson
Undergraduate Honors Thesis Collection
Though classical random walks have been studied for many years, research concerning their quantum analogues, quantum random walks, has only come about recently. Numerous simulations of both types of walks have been run and analyzed, and are generally well-understood. Research pertaining to one of the more important properties of classical random walks, namely, their ability to build fractal structures in diffusion-limited aggregation, has been particularly noteworthy. However, nobody has yet pursued this avenue of research in the realm of quantum random walks. The study of random walks and the structures they build has various applications in materials science. Since all …
The Effect Of Tidal Disruptions On Giant Stars In The Galactic Center, Brian B. Geiss
The Effect Of Tidal Disruptions On Giant Stars In The Galactic Center, Brian B. Geiss
Undergraduate Honors Thesis Collection
Recent observational data suggest the depletion of late-type giant stars in the inner most region of the Galactive Nucleus. Using dynamically evolving Fokker-Planck models of the Galactic Nucleus, we have followed in detail the stellar distribution as it evolves through the postmain-sequence phases. Of particular interest was the effect of stellar collisions and tidal disruptions by the central massive black hole on post main sequence stars as they expand in size. B y modeling tidal disruptions and stellar collisions, we have found that there should be a significant depletion of the giant stars in the innermost regions of the nucleus. …
Numerical Simulation Of Nonlinear Wave Propagation With Application To Geophysical Prospecting, Andrew M. Smith
Numerical Simulation Of Nonlinear Wave Propagation With Application To Geophysical Prospecting, Andrew M. Smith
Undergraduate Honors Thesis Collection
Specifically, this research is intended to extend the use of the seismic reflection method to materials for which traditional linear wave analysis is insufficient.
Modeling Bound States In The Continuum For Multiple Electrons In A Quantum Dot Pair, Thomas Ian Tuegel
Modeling Bound States In The Continuum For Multiple Electrons In A Quantum Dot Pair, Thomas Ian Tuegel
Undergraduate Honors Thesis Collection
The bound eigenstates of an electron inside a pair of quantum dots embedded on an infinite quantum wire are examined using the method of particular solutions. The eigenstates of a two-electron system in the same structure are examined perturbatively using wavefunction expansions for the one-electron eigenstates. The stability of the two-electron eigenstates is evaluated and compared with other theoretical results. It is found that stable bound states in the continuum exist for two electrons confined to this geometry.
Determination Of Energy Level Excitation States Of Time Dependent Optogalvanic Signals In A Discharge Plasma, Michael Christopher Blosser
Determination Of Energy Level Excitation States Of Time Dependent Optogalvanic Signals In A Discharge Plasma, Michael Christopher Blosser
Undergraduate Honors Thesis Collection
When tuning a laser between two excited energy levels of the atoms in a discharge plasma, the discharge current will temporarily be disturbed. This disturbance or change in current is the optogalvanic effect (OGE). The fundamental goal of this project is to determine the exponential rates in the time-dependent OGE signals. These rates are related to the collision rates for the atoms in the plasma. The OGE data will be experimentally recorded, fitted, and analyzed to extract the exponential rates related to the energy levels of the atom in gas in the discharge lamp.
Implementing Quantum Random Walks In Two-Dimensions With Application To Diffusion-Limited Aggregation, Colin Frederick Sanberg
Implementing Quantum Random Walks In Two-Dimensions With Application To Diffusion-Limited Aggregation, Colin Frederick Sanberg
Undergraduate Honors Thesis Collection
This study simulates random movement and aggregation of particles in two-dimensional space based upon both quantum and classical mechanics. Using an original computer program to perform the calculations, the objective is to compare how quantum effects influence the random movement of a particle in comparison to the classical random movement. These effects are further studied by analyzing how the amassing of particles around a "seed" is affected by the differences in the random movement. Using the classical models that were generated as the basis of comparison, the initial results show that the quantum model aggregate grows at a slower ratc …
The Spectroscope In Celestial Physics, S. A. Harker
The Spectroscope In Celestial Physics, S. A. Harker
Manuscript Thesis Collection
No abstract provided.