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2020 Aquaponics Industry Survey Dataset
No full textThis dataset contains the responses from an international aquaponics industry survey conducted from December 2019 to June 2020. Responses (N = 433) were collected using a mixture of question formats to obtain qualitative and quantitative data. Respondents differentiated themselves as hobbyist, producer, educator, or supporting group. All groups received the introductory block (21 questions), training/work hours (2), fish production (11), plant production (14), food safety (7), demographics (8) and a wrap-up block to collect voluntary survey feedback and contact information (4). Educators received 10 classroom usage questions and producers received 23 additional questions about business and marketing. This data should be used to inform research, teaching, and Extension efforts. This data has been de-identified to protect the confidentiality of the respondents. Please contact the author with questions.Ye
Review: Michael Hollington, George Eliot Middlemarch, Clefs concours Anglais-Litterature
No full textArticle from the George Eliot Review, digitized and hosted by the George Eliot Review Online.Publishe
Review: George Eliot: Interdisciplinary Essays: A Bicentennial Collection. Ed. Jean Arnold and Lila Marz Harper
No full textArticle from the George Eliot Review, digitized and hosted by the George Eliot Review Online.Publishe
Reflecting on the Past, Reconstructing the Future: Faculty Members’ Threshold Concepts for Teaching Writing in the Disciplines
Get PDFA growing body of scholarship in writing studies has started exploring threshold concepts for writing, providing a synoptic view of the transformations students undergo as they learn about writing. However, the field has not yet undertaken a systematic investigation of threshold concepts for the teaching of writing. A distinction between threshold concepts for writing and threshold concepts for the teaching of writing is especially important for WAC initiatives that work with faculty in the disciplines who may not have extensive training in writing pedagogy. Research into threshold concepts for the teaching of writing in the disciplines can help WAC professionals better understand the conceptual transformations these faculty experience as they participate in our programs. In this article, we present three threshold concepts for the teaching of writing in the disciplines that we identified: effective writing pedagogy involves iterative, multifaceted change; students’ development as writers can be supported through scaffolded interventions; and genres can be taught as actions, not (just) as forms. To illustrate these concepts, we share faculty narratives from a survey and focus groups, which we analyze using a narrative framework for identifying threshold concepts derived from phenomenographic analysis. We conclude by suggesting additional candidates for threshold concepts for the teaching of writing in the disciplines, and commenting on the value of narrative for promoting faculty reflection and assessing WAC faculty development.PublishedYe
Identification of Rickettsia felis DNA in the blood of domestic cats and dogs in the USA
Get PDFBackground: The main vector and reservoir host of Rickettsia felis, an emerging human pathogen causing flea-borne
spotted fever, is the cat flea Ctenocephalides felis. While cats have not been found to be infected with the organism,
significant percentages of dogs from Australia and Africa are infected, indicating that they may be important mammalian reservoirs. The objective of this study was to determine the presence of R. felis DNA in the blood of domestic
dogs and cats in the USA.
Methods: Three previously validated PCR assays for R. felis and DNA sequencing were performed on blood samples
obtained from clinically ill domestic cats and dogs from 45 states (2008–2020) in the USA. The blood samples had
been submitted for the diagnosis of various tick-borne diseases in dogs and feline infectious peritonitis virus, feline
immunodeficiency virus, and Bartonella spp. in cats. Phylogenetic comparisons were performed on the gltA nucleotide sequences obtained in the study and those reported for R. felis and R. felis-like organisms.
Results: Low copy numbers of R. felis DNA (around 100 copies/ml whole blood) were found in four cats (4/752,
0.53%) and three dogs (3/777, 0.39%). The very low levels of infection in clinically ill animals is consistent with R. felis
being an unlikely cause of disease in naturally infected dogs and cats. The low copy numbers we found emphasize
the requirement for very sensitive PCRs in prevalence studies.
Conclusions: The low prevalence of naturally infected PCR-positive cats is further evidence that cats are unlikely to
be important reservoirs of R. felis. Similarly, the low prevalence in dogs suggests they are not important reservoirs in
the USA. Investigations should continue into the role other mammalian species may be playing in the epidemiology
of R. felis infections.Publishedye
Kinetic Alfven Waves From Magnetotail to the Ionosphere in Global Hybrid Simulation Associated With Fast Flows
No full textWe have used the Auburn Global Hybrid Code in 3-D to study the generation, dynamics, and global structure of kinetic Alfven waves (KAWs) from the magnetotail to the ionosphere. Our results show that KAWs are generated in magnetic reconnection in the plasma sheet, located around fast flows, and carrying transverse electromagnetic perturbations, parallel Poynting fluxes, parallel currents, and parallel electric field. Overall, shear Alfvenic turbulent spectrum is found in the plasma sheet. The KAWs are shear Alfven waves possessing short perpendicular wavelength with k(perpendicular to)rho(i) similar to 1, where k(perpendicular to) is the perpendicular wave number and rho(i) the ion Larmor radius. The KAWs are identified by their dispersion relation and polarizations. The structures of these KAWs embedded in the plasma sheet are also revealed by placing a virtual satellite in the tail. In order to understand whether the Poynting fluxes carried by the shear Alfven waves/KAWs in the plasma sheet can be carried directly along field lines to the ionosphere, we have tracked the wave propagation from the plasma sheet to the ionosphere. It is found that in front of the flow-braking region, the structure and strength of the shear Alfven waves are significantly altered due to interaction with the dipole-like field, mainly by the flow shear associated with the azimuthal convection. Also in front of the dipole-like field region, ion kinetic effects (Hall effects) lead to the generation of additional pairs of KAWs. As such, the generation and transport of the shear Alfven waves/KAWs to the ionosphere are illustrated for the first time in a comprehensive manner on the global scale.PublishedYe
Whistler Mode Waves Excited by Anisotropic Hot Electrons With a Drift Velocity in Earth's Magnetosphere: Linear Theory
Get PDFWith a linear theoretical model, we have investigated the properties of whistler waves excited by anisotropic hot electrons with a drift velocity parallel to the background magnetic field, which is usually neglected in previous studies. It is found that a finite drift velocity can significantly change the properties of excited whistler waves, resulting in distinct properties for parallel and antiparallel propagating waves. In the high-beta regime, as the drift velocity increases, the frequency of parallel propagating whistler waves increases, while that of antiparallel propagating waves is found to decline. So parallel and antiparallel propagating whistler waves appear in different frequency bands. However, the growth rate of parallel wave is always smaller than that of antiparallel wave and falls below 10(-2)Omega(e) for large drift velocities (v(d)/v(th) > 1.5), in which case the parallel wave may be too weak to be observed. Generally, the growth rate of whistler waves in both directions is enhanced with the increasing anisotropy or proportion of hot electrons. In the low-beta regime, the trends of the frequency and linear growth rate of excited whistler waves are quite similar to those in the high-beta regime. But with the increase of the drift velocity, the wave normal angle of parallel propagating whistler waves gradually declines until reaching 0, while that of antiparallel propagating waves continues to increase. Our study may be helpful to understand various whistler mode spectra observed in the Earth's magnetosphere.PublishedYe
Review: Thomas Albrecht, The Ethical Vision of George Eliot
No full textArticle from the George Eliot Review, digitized and hosted by the George Eliot Review Online.Publishe