7,606 research outputs found
WPA Interview - Lee M. Calloway
No full textA transcript of a WPA Interview with Lee M. Calloway conducted by Chas R. Fuller in the 1930s. Calloway was boring in Ash County, North Carolina on March 16, 1858 a year prior to his family moving to Tarrant County. He recalls moving east of Birdville in 1864. Calloway also describes moving to Smithfield in 1883 and then to Fort Worth in 1886. He recalls working for stores in Fort Worth and describes an incident his father had with others at a Spring.https://mavmatrix.uta.edu/specialcollections_workprojectsadministration/1136/thumbnail.jp
The subzero microbiome: Microbial activity in frozen and thawing soils
No full textMost of the Earth's biosphere is characterized by low temperatures (<5 °C) and cold-adapted microorganisms are widespread. These psychrophiles have evolved a complex range of adaptations of all cellular constituents to counteract the potentially deleterious effects of low kinetic energy environments and the freezing of water. Microbial life continues into the subzero temperature range, and this activity contributes to carbon and nitrogen flux in and out of ecosystems, ultimately affecting global processes. Microbial responses to climate warming and in particular, thawing of frozen soils are not yet well understood although the threat of microbial contribution to positive feedback of carbon flux is substantial. To date, several studies have examined microbial community dynamics in frozen soils and permafrost due to changing environmental conditions, and some have undertaken the complicated task of characterizing microbial functional groups and how their activity changes with changing conditions, either in situ or by isolating and characterizing macromolecules. With increasing temperature and wetter conditions microbial activity of key microbes and subsequent efflux of greenhouse gases also increase. In this review, we aim to provide an overview of microbial activity in seasonally frozen soils and permafrost. With a more detailed understanding of the microbiological activities in these vulnerable soil ecosystems, we can begin to predict and model future expectations for carbon release and climate change.Peer reviewe
Interaction of flexible filaments with the wake of cylinder at low Reynolds numbers
No full textThis work is the very first attempt to understand and optimize the configuration of flexible filaments placed on the lee side of a bluff body to manipulate flow transitions and bifurcations. It is found that the presence of a sparse set of flexible filaments on the lee side of a cylinder can interfere with the 2D-3D transition process resulting in elongation of recirculation bubble, inhibition of higher order unstable modes, and narrowing the global energy content about a particular shedding frequency. Filaments become effective when spacing between them is smaller than the dominant unstable mode at each particular Reynolds number, i.e. A and B modes
Mie scattering captures observed optical properties of ambient biomass burning plumes assuming uniform black, brown, and organic carbon mixtures
No full textMie scattering captures observed optical properties of ambient biomass burning plumes assuming uniform black, brown, and organic carbon mixtures
Citation: Chylek, P., Lee, J. E., Romonosky, D. E., Gallo, F., Lou, S., Shrivastava, M., Carrico, C. M., Aiken, A. C., Dubey, M. K. (2019), Mie scattering captures observed optical properties of ambient biomass burning plumes assuming uniform black, brown, and organic carbon mixtures. J. Geophys. Res. Atmopsheres.
Corresponding Author: Chylek, P.
Email: [email protected]
Data Description:
Summary of SSA and AAE values for laboratory burns. Fuel for Laboratory burns was approximately 50 g of masticated material. A resistance heater, approximately 700 C, was used to ignite burns. SSA and AAE values are time weighted average and standard deviation
Auto-regulating New Media
No full textUsing Foucault's (1977, 1978) notion of panoptic method of governmentality and looking at the case of Singapore's Internet policy, this paper attempts to expand on the idea-and ideals-of 'auto-regulation'(Lee, 2000, pp. 4-5; Lee & Birch, 2000). Auto-regulation, as I shall posit in this paper, provides a way for regulatory enforcement and surveillance to become sufficiently transparent and 'normalised' so that 'the exercise of power may be supervised by society as a whole'(Foucault, 1977, pp.207-208) rather than by a select group of policy and law enforcement officers, or civil society /activist groups
The Marble Man: Images Depict Lee, His Friends, And His Legend
No full textRobert E. Lee: An Album tells of Lee\u27s life through images. This book is an album in the literal sense, author Emory M. Thomas explains. It contains pictures, contemporary with Lee and with us, of places associated with Lee. It includes pictures of people Lee knew and pictures of Lee. Here...
Biography of Mary Jane Oliver
No full textTypescript of a sketch biography about Mary Jane (Oliver) Barlow, who came came from England around 1851 and with her husband, Oswald Barlow, helped to settle Saint George. Author unknown, but copied on January 13, 1937 by Virginia M. Lee of the Federal Writers Project, WPA, at Ogden, Uta
P01-330 - Dreaming Brain and Acculturative Mind
No full textAuthor intends to explicate dreaming brain and mind interactions by interpreting the neurophenomenology of dreaming brain as well as by analyzing the narratives of collected dream data. The author articulates acculturative dreaming mind by demonstrating two empirical research outcomes and suggests some analogical connections between dreaming brain and acculturative dreaming mind.The author explored an acculturative dreaming model by analyzing dream data that show an unconscious self-adaptation or acculturative self-process. The author designed “Lee Acculturation Dream Scale” (Lee, Sang Bok, 2005: Psychological Reports, 96, 454-456) to analyze the location of each dream by evaluating the dream content. A two-sample t test on the mean score of the “Lee Acculturation Dream Scale” indicated significant difference between men and women (Lee, 2005).In terms of domain-specific dreaming mind the author analyzed the dreamers’ anxiety level by evaluating the dream content. A sample t test on the “Lee Cross-cultural Anxiety Dream Scale”(Lee, Sang Bok, 2008) means showed significant difference between the two groups(p< 0.001): Korean college students group (N=93, M=1.7, SD=1.2) and Korean-American college student group (N=165, M=2.3, SD=1.5). In this study, Korean American college students, who were experiencing cross-cultural life situation and under acculturation process in the USA, showed more anxiety in their dream contents than Korean college students.Dreaming brain and mind need to be recapitulated as having inherently acculturative function regardless of cultural origins, value or life-style difference.</jats:p
Novel Reductive Dehalogenases from the Marine Sponge Associated Bacterium Desulfoluna spongiiphila
No full textDesulfoluna spongiiphila strain AA1 is an organohalide respiring bacterium, isolated from the marine sponge Aplysina aerophoba, that can use brominated and iodinated phenols, in addition to sulfate and thiosulfate as terminal electron acceptors. The genome of Desulfoluna spongiiphila strain AA1 is approximately 6.5 Mb. Three putative reductive dehalogenase (rdhA) genes involved in respiratory metabolism of organohalides were identified within the sequence. Conserved motifs found in respiratory reductive dehalogenases (a twin arginine translocation signal sequence and two iron-sulfur clusters) were present in all three putative AA1 rdhA genes. Transcription of one of the three rdhA genes was significantly upregulated during respiration of 2,6-dibromophenol and sponge extracts. Strain AA1 appears to have the ability to synthesize cobalamin, the key cofactor of most characterized reductive dehalogenase enzymes. The genome contains genes involved in cobalamin synthesis and uptake and can grow without cobalamin supplementation. Identification of this target gene associated with debromination lays the foundation for understanding how dehalogenating bacteria control the fate of organohalide compounds in sponges and their role in a symbiotic organobromine cycle. In the sponge environment, D. spongiiphila strain AA1 may thus take advantage of both brominated compounds and sulfate as electron acceptors for respiration.Peer reviewe
Intern experience with Texas Utilities Services, Inc.: an internship report
No full textIncludes author's vita (leaf 78)"Submitted to the College of Engineering of Texas A&M University in partial
fulfillment of the requirement for the degree of Doctor of Engineering."Includes bibliographical referencesThis report is a review of the author's year of experience as an intern
with Texas Utilities Services...The author worked as a Nuclear Fuels Engineer for the duration
of the internship period. His primary assignment was the development of a system to facilitate
the financial accounting and materials accountability for nuclear fuel. This assignment
required the author to coordinate the design process with many people from different
disciplines. In addition, the author was responsible for performing financial and economic
analyses of the nuclear fuel cycle. This offered him the opportunity to evaluate the economic
impact of various engineering and financial decisions upon the nuclear fuel
cycle
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