5,117 research outputs found

    Blackboard Teaching and Learning Conference 2010

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    Conference revie

    Patterns of megafloral change across the Cretaceous-Tertiary boundary in the Northern Great Plains and Rocky Mountains

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    The spatial and temporal distribution of vegetation in the terminal Cretaceous of Western Interior North America was a complex mosaic resulting from the interaction of factors including a shifting coastline, tectonic activity, a mild, possibly deteriorating climate, dinosaur herbivory, local facies effects, and a hypothesized bolide impact. In order to achieve sufficient resolution to analyze this vegetational pattern, over 100 megafloral collecting sites were established, yielding approximately 15,000 specimens, in Upper Cretaceous and lower Paleocene strata in the Williston, Powder River, and Bighorn basins in North Dakota, Montana, and Wyoming. These localities were integrated into a lithostratigraphic framework that is based on detailed local reference sections and constrained by vertebrate and palynomorph biostratigraphy, magnetostratigraphy, and sedimentary facies analysis. A regional biostratigraphy based on well located and identified plant megafossils that can be used to address patterns of floral evolution, ecology, and extinction is the goal of this research. Results of the analyses are discussed

    Black Hole: The Role of Black Aesthetics in Science Fiction

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    The main purpose of this thesis is to answer the question of why the genre of science fiction permits African-American authors to expand their themes beyond African-American concerns and characters. This thesis puts forward the argument that science fiction provides African-American writers with the capacity to craft their works\u27 central conflicts to include or exclude issues that affect the Black community. This thesis answers the question in four points, the first being a brief historical overview of the debate within the Black literary community on the prevalence of Black aesthetics. The overview also gives a summary of the debate over the true definition of science fiction. The next three points comprise the main body of the text by giving examples of the diversity of issues explored by three selected authors: Samuel Delany, Octavia Butler, and Charles Johnson. The thesis concludes that science fiction offers a freedom to African-American writers that cannot be found in other genres of fiction because its subjects are not bound by the social and cultural norms of a reality-based world

    The Development Of The ARP Colored Vocational High School, ARP, Texas, As A Consolidated School

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    If one peruses various indexes to studies in the numerous areas of education, he will observe the paucity of investigations dealing with the history and development of institutions whether they be universities, colleges, high schools, or elementary schools. Ever since the educational renaissance which began in the United States during the latter part of the eighteenth century, educational institutions have been constantly aware that the world Is in a state of continual flux and; therefore, to keep pace with the progress of the world, curricula must be constantly revised and improved to meet the students\u27 needs in their respective residential areas. In line with this philosophy, schools have consolidated for the purpose of better serving a larger rural area and community. And because the larger student populations of a consolidated area and community will not all attend college or university, industrial arts and homemaking courses have been included in the curriculum. Thus the school seeks to prepare people for life and to serve the community by increasing the happiness, hopes, and aspirations of the people who reside in it. The growth of colored secondary schools is an interesting field for study. When one considers the fact that the number of schools offering secondary education for colored people has Increased from fewer than 100 to approximately 1,400 within a generation, and the more significant fact that the enrollment of Negro high school pupils has risen from 4,000 to 167,000 during the same period, the need for investigation of the factors involved in this tremendous educational advance and the implications of this movement become immediately apparent. As the high school enrollment increased, the need for industrial high schools correspondingly increased. The provision for industrial education in rural high schools for colored pupils in Texas helped to extend the Tuskegee Institute idea of Booker T. Washington— education of the hands. But Washington\u27s idea, while new to America, was a part of the philosophy of the empirics who contended that knowledge is gained only through observation and practical experience. Thus the idea behind the Arp Colored Industrial High School is that of preparing the pupils to live a better and fuller life in the community. In so doing it is hoped that they will live the more abundant life

    Unit organization of the topic simple machines for ninth-grade general science

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    Thesis (Ed.M.)--Boston Universit

    On the limited amplitude resolution of multipixel Geiger-mode APDs

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    The limited number of active pixels in a Geiger-mode Avalanche Photodiode (G-APD) results not only in a non-linearity but also in an additional fluctuation of its response. Both these effects are taken into account to calculate the amplitude resolution of an ideal G-APD, which is shown to be finite. As one of the consequences, the energy resolution of a scintillation detector based on a G-APD is shown to be limited to some minimum value defined by the number of pixels in the G-APD.Comment: 5 pages, 3 figure

    Ariel - Volume 3 Number 4

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    Editors Richard J. Bonanno Robin A. Edwards Associate Editors Steven Ager Tom Williams Lay-out Editor Eugenia Miller Contributing Editors Paul Bialas Robert Breckenridge Lynne Porter David Jacoby Terry Burt Mark Pearlman Michael Leo Mike LeWitt Editors Emeritus Delvyn C. Case, Jr. Paul M. Fernhof

    The M-type stars

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    The papers in this volume cover the following topics: (1) basic properties and photometric variability of M and related stars; (2) spectroscopy and nonthermal processes; (3) circumstellar radio molecular lines; (4) circumstellar shells, the formation of grains, and radiation transfer; (5) mass loss; (6) circumstellar chemistry; (7) thermal atmospheric models; (8) quasi-thermal models; (9) observations on the atmospheres of M dwarfs; and (1) theoretical work on M dwarfs

    Lightweight Inflatable Solar Array: Providing a Flexible, Efficient Solution to Space Power Systems for Small Spacecraft

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    Affordable and convenient access to electrical power is critical to consumers, spacecraft, military and other applications alike. In the aerospace industry, an increased emphasis on small satellite flights and a move toward CubeSat and NanoSat technologies, the need for systems that could package into a small stowage volume while still being able to power robust space missions has become more critical. As a result, the Marshall Space Flight Center's Advanced Concepts Office identified a need for more efficient, affordable, and smaller space power systems to trade in performing design and feasibility studies. The Lightweight Inflatable Solar Array (LISA), a concept designed, prototyped, and tested at the NASA Marshall Space Flight Center (MSFC) in Huntsville, Alabama provides an affordable, lightweight, scalable, and easily manufactured approach for power generation in space or on Earth. This flexible technology has many wide-ranging applications from serving small satellites to soldiers in the field. By using very thin, ultraflexible solar arrays adhered to an inflatable structure, a large area (and thus large amount of power) can be folded and packaged into a relatively small volume (shown in artist rendering in Figure 1 below). The proposed presentation will provide an overview of the progress to date on the LISA project as well as a look at its potential, with continued development, to revolutionize small spacecraft and portable terrestrial power systems

    Aquilegia, Vol. 22 No. 3, May-June 1998: Newsletter of the Colorado Native Plant Society

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    https://epublications.regis.edu/aquilegia/1173/thumbnail.jp
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