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The Role of George Henry Lewes in George Eliot's Career: A Reconsideration
Get PDFRilett's article examines the "protection" and "encouragement" George Henry Lewes provided to Eliot throughout her fiction-writing career. According to biographers, Lewes showed his selfless devotion to Eliot by encouraging her to begin and continue writing fiction; by fostering the mystery of her authorship; by managing her finances; by negotiating her publishing contracts; by managing her schedule; by hosting a salon to promote her books; and by staying close by her side for twenty-four years until death parted them. By reconsidering each element of Lewes's devotion separately, Rilett challenges the prevailing construction of the Eliot–Lewes relationship as the ideal partnership of literary agent and author and the perfect marriage. Rilett's revisionist interpretation seeks to open up Eliot's fiction to productive new biographical readings for a new generation of scholars.PublishedYe
Scalings for the Alfven-cyclotron instability: Linear dispersion theory and hybrid particle-in-cell simulations
Get PDFThe Alfven-cyclotron instability is driven by an ion temperature anisotropy such that T-perpendicular to/T-|| >1 where and || denote directions perpendicular and parallel to a uniform background magnetic field B-o, respectively. The computations presented here consider a model of a magnetized, homogeneous, collisionless plasma. Two representations of the proton velocity distribution are considered: a single bi-Maxwellian and a magnetospheric-like configuration of two components, a more dense, relatively cool, isotropic component and a less dense, relatively hot, bi-Maxwellian component which drives the instability. Only wave propagation parallel to B-o is considered. Using numerical solutions of the full kinetic linear dispersion equation, concise analytic expressions for the scaling of the dimensionless maximum instability growth rate and the corresponding dimensionless real frequency are derived as functions of three dimensionless variables: the hot proton temperature anisotropy, the relative hot proton density, and the hot proton (||). Furthermore, using one-dimensional hybrid particle-in-cell simulations of this same instability, a third relation for the scaling of the maximum amplitude of the dimensionless fluctuating magnetic field energy density is derived.Publishe
Tick-Borne Illnesses of Alabama: Relationships Among Hosts, Habitats, and Ticks Throughout the State
No full textTicks are the foremost parasites of wildlife and humans in the United States, and may transmit pathogens associated with Lyme disease, Ehrlichiosis, spotted fever Rickettsiosis, and others. Despite the high occurrence of several species of ticks throughout Alabama, little is known about their distribution or the degree to which they carry pathogens. Consequently, the probability of encountering infected ticks in the state is unknown. For this project, we identified land use and climatic factors that affect tick and pathogen distribution and risk, and determined relationships among habitats, ticks, pathogens, and hosts. Ticks were trapped for one year (5/16-5/17) on 105 sites in deciduous, coniferous, pasture, early successional, and residential areas throughout Alabama. Hourly forest floor temperature and relative humidity were recorded on the same sites. Additionally, during the summers of 2015 and 2016, 478 ticks were collected from 89 white-tailed deer in 12 counties, and 3,302 ticks were collected from 809 deer on 12 Wildlife Management Areas during two successive winters from 2015-2017. Preliminary analyses show that across all locations and land uses, minimums and ranges of humidity and temperature are the primary drivers of overall tick abundance, particularly for nymphs. Conversely, within each land use, forest floor characteristics are the primary drivers. Additionally, while only 11% (n=61) of ticks captured on traps are black-legged ticks, 88% (n=2,894) were collected from deer between November to February, elucidating a deer’s critical role in their survival and movement, and suggesting traditional sampling methods for this species are ineffective in the Southeast.Analyses in progressN
Case 6.3 Auburn University: Collaboration and Inclusivity in a Campus-Wide ePortfolio Project
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Case 3.2: The Miller Writing Center at Auburn University: Semester Monitoring of Statistics to Respond On-Time
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Simulated Summer Rainfall Variability Effects on Loblolly Pine (Pinus taeda) Seedling Physiology and Susceptibility to Root-Infecting Ophiostomatoid Fungi
Get PDFSeedlings from four families of loblolly pine (Pinus taeda L.) were grown in capped open-top chambers and exposed to three different weekly moisture regimes for 13 weeks. Moisture regimes varied in intensity and frequency of simulated rainfall (irrigation) events; however, the total amounts were comparable. These simulated treatments were chosen to simulate expected changes in rainfall variability associated with climate change. Seedlings were inoculated with two root-infecting ophiostomatoid fungi associated with Southern Pine Decline. We found susceptibility of loblolly pine was not affected by water stress; however, one family that was most sensitive to inoculation was also most sensitive to changes in moisture availability. Many studies have examined the effects of drought (well-watered vs. dry conditions) on pine physiology and host-pathogen interactions but little is known about variability in moisture supply. This study aimed to elucidate the effects of variability in water availability, pathogen inoculation and their interaction on physiology of loblolly pine seedlings.Ye
Case 5.3: ePortfolios as an Archive of Development in Studio Arts at Auburn University
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Generation of rising-tone chorus in a two-dimensional mirror field by using the general curvilinear PIC code
Get PDFRecently, the generation of rising-tone chorus has been implemented with one-dimensional (1-D) particle-in-cell (PIC) simulations in an inhomogeneous background magnetic field, where both the propagation of waves and motion of electrons are simply forced to be parallel to the background magnetic field. In this paper, we have developed a two-dimensional (2-D) general curvilinear PIC simulation code and successfully reproduced rising-tone chorus waves excited from an anisotropic electron distribution in a 2-D mirror field. Our simulation results show that whistler waves are mainly generated around the magnetic equator and continuously gain growth during their propagation toward higher-latitude regions. The rising-tone chorus waves are observed off the magnetic equator, which propagate quasi-parallel to the background magnetic field with the wave normal angle smaller than 25 degrees. Due to the propagating effect, the wave normal angle of chorus waves is increasing during their propagation toward higher-latitude regions along an enough curved field line. The chirping rate of chorus waves is found to be larger along a field line with a smaller curvature.PublishedYe
Foreshock wave interaction with the magnetopause: Signatures of mode conversion
No full textOur previous hybrid simulation (Shi et al., 2013) under a radial interplanetary magnetic field (IMF) and a supercritical solar wind Mach number has shown that foreshock compressional waves originated from the quasi-parallel (Q-parallel to) shock are mode converted to kinetic Alfven waves (KAWs) at the Alfven resonance surface of the subsolar magnetopause. In this paper, three-dimensional global dayside mode conversion is investigated for cases under various solar wind conditions using the global hybrid model. The global patterns and propagations of KAWs are distinguished and presented. Under a near-critical Mach number (M-A = 3), KAW structures due to mode conversion exhibit a feature of broader excitation regions in the magnetopause boundary layer (MPBL) compared to supercritical Mach number (M-A = 5) shocks. For cases with an oblique IMF with supercritical Mach numbers (M-A = 5), the amplitude of magnetosheath compressional waves is larger at the quasi-parallel shock (Q-parallel to) than at the quasi-perpendicular (Q-perpendicular to) shock. Downstream of the Q-parallel to shock, there is a general trend that the perturbations of density (N) and magnetic field (B) change from predominantly in-phase in the magnetosheath to antiphase near the MPBL. While downstream of the Q-perpendicular to shock, an antiphase relation between N and B is dominant throughout the magnetosheath and magnetopause except near the shock transition. The compressional drivers are found to reach an extended region of the magnetopause due to the combined effects of wave propagation in the plasma frame and flow convection, leading to a broad region of mode conversion at the magnetopause. Subsequently, the resulting KAWs can be carried to the regions downstream of the Q-perpendicular to shock owing to the flow convection at the magnetopause. The KAWs propagate poleward along the geomagnetic field lines and meanwhile are carried tailward by the ambient flows, and they are more intense in the downstream of Q-parallel to shocks than downstream of Q-perpendicular to shocks.PublishedYe