Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- Anthropogenic (1)
- Asymmetry (1)
- Bacteria (1)
- Binding (1)
- Carbon monoxide (1)
-
- Carboxydothermus hydrogenoformans (1)
- Columbian (1)
- Computation time (1)
- Computer simulation (1)
- CooA (1)
- DNA (1)
- Discrete stochastic model (1)
- Escherichia coli (1)
- Extinct (1)
- Gluon (1)
- Heme protein (1)
- Hemoprotein (1)
- Homolog (1)
- Human migration (1)
- Invariant mass (1)
- Longitudinal (1)
- Mammoth (1)
- Mathematical model (1)
- Migration rate (1)
- Mutagenesis (1)
- North America (1)
- Nuclear physics (1)
- Overkill hypothesis (1)
- Particles (1)
- Photon (1)
- Publication
- Publication Type
Articles 1 - 4 of 4
Full-Text Articles in Physical Sciences and Mathematics
Minimal Noise-Induced Stabilization Of One-Dimensional Diffusions, Tony Allen, Emily Gebhardt, Adam Kluball, Tiffany N. Kolba
Minimal Noise-Induced Stabilization Of One-Dimensional Diffusions, Tony Allen, Emily Gebhardt, Adam Kluball, Tiffany N. Kolba
Mathematics and Statistics Faculty Publications
The phenomenon of noise-induced stabilization occurs when an unstable deterministic system of ordinary differential equations is stabilized by the addition of randomness into the system. In this paper, we investigate under what conditions one-dimensional, autonomous stochastic differential equations are stable, where we take the notion of stability to be that of global stochastic boundedness. Specifically, we find the minimum amount of noise necessary for noise-induced stabilization to occur when the drift and noise coefficients are power, polynomial, exponential, or logarithmic functions.
Measurement Of The Longitudinal Double-Spin Asymmetry For Neutral Pion Production In Polarized Proton Collisions At √S = 510 Gev, Taegyun Kim
Physics & Astronomy Honors Papers
Beyond the valence quarks' spin contribution to the total spin of a proton, gluon and sea quark contributions are becoming clear as well. For proton+proton collisions at a center of mass energy of 510 GeV , neutral pion production is dominated by gluon-gluon and gluon-quark scattering. An avenue to constrain the gluon polarization is the asymmetry, ALL, in the production of neutral pions from collisions of longitudinally spin-polarized proton beams. Our experiment was performed with the STAR detector at the Relativistic Heavy Ion Collider (RHIC), unique for its ability to collide spin-polarized proton beams. The Endcap Electromagnetic Calorimeter …
Mutagenic And Spectroscopic Investigation Of Ph Dependent Cooa Dna Binding, Brian R. Weaver
Mutagenic And Spectroscopic Investigation Of Ph Dependent Cooa Dna Binding, Brian R. Weaver
Chemistry Honors Papers
The carbon monoxide (CO) sensing heme protein, CooA, is a transcription factor which exists in several bacteria that utilize CO as an energy source. CooA positively regulates the expression of coo genes in the presence of CO such that the corresponding proteins may metabolize CO. The present studies have yielded the unexpected result that Fe(III) CooA binds DNA tightly at pH < 7, deviating from all previously reported work which indicate that CooA DNA binding is initiated only when the exogenous CO effector reacts with the Fe(II) CooA heme. This observation suggests that the disruption of one or more salt bridges upon effector binding may be a critical feature of the normal CooA activation mechanism. To test this possibility, several protein variants that eliminated a selected salt bridge for the CooA homolog from Rhodospirillum rubrum were prepared via site-directed mutagenesis. Samples of these variant proteins, which were overexpressed in Escherichia coli, were then characterized by spectroscopic methods and functional assays to investigate the impact these mutations had on CooA heme coordination …
A Simulation Of Anthropogenic Mammoth Extinction, Matthew Klapman
A Simulation Of Anthropogenic Mammoth Extinction, Matthew Klapman
Undergraduate Honors Papers
There are multiple hypotheses as to why the Columbian Mammoth (Mammuthus columbi) and other megafauna in North America went extinct relatively recently and relatively quickly. The most popular of which are disease, climate change, meteorite strikes, and over hunting by humans [2, 9]. There is evidence to show that a combination of factors contributed to the megafaunal extinction, but ”overkill” explores the idea that early humans migrated onto the continent and then hunted the mammoths and other megafauna to extinction. The overkill hypothesis was first proposed by anthropologist Paul Martin in 1973 [8]. Evidence from radiocarbon dating shows that the …