4,341 research outputs found

    Imperial Valley's proposal to develop a guide for geothermal development within its county

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    A plan to develop the geothermal resources of the Imperial Valley of California is presented. The plan consists of development policies and includes text and graphics setting forth the objectives, principles, standards, and proposals. The plan allows developers to know the goals of the surrounding community and provides a method for decision making to be used by county representatives. A summary impact statement for the geothermal development aspects is provided

    Channel-wall limitations in the magnetohydrodynamic induction generator

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    Discussion of magnetohydrodynamic induction generator examines the machine in detail and materials problems influencing its design. The higher upper-temperature limit of the MHD system promises to be more efficient than present turbine systems for generating electricity

    Review of \u3ci\u3eBleeding Borders: Race, Gender, and Violence in Pre-Civil War Kansas\u3c/i\u3e by Kristen Tegtmeier Oertel

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    Bleeding Kansas has long been an important topic for political historians exploring how it influenced Congress, presidential campaigns, and the coming of the Civil War. Kristen Tegtmeier Oertel\u27s book uses the insights of recent social historians to add depth to this political narrative, thereby strengthening our understanding of how antebellum Kansas changed America. Bleeding Borders begins with a chapter that positions Kansas as a frontier territory. Oertel\u27s antebellum Kansans are divided by race, but not just between white and black. Starting her history in the 1820s, Oertel finds that white settlers\u27 perceptions of and interactions with Kansas Indians played a crucial role in developing white racial identity. Drawing on studies of whiteness, she finds that almost all white settlers compared themselves favorably to both the area\u27s older and more recent Indian nations, setting the stage for her conclusion that white supremacy would be a common belief among whites on both sides of the slavery question. The only exceptions to that rule, she notes, were a handful of white abolitionists who worked with African Americans to stop attempts to bring slavery (and slaves) into the Territory. Oertel\u27s section on the pervasiveness of slave resistance is particularly strong, and the African American efforts against enslavement that she chronicles help to explain both the desperation of the proslavery settlers and their ultimate failure

    Review of \u3ci\u3eBleeding Borders: Race, Gender, and Violence in Pre-Civil War Kansas\u3c/i\u3e by Kristen Tegtmeier Oertel

    Get PDF
    Bleeding Kansas has long been an important topic for political historians exploring how it influenced Congress, presidential campaigns, and the coming of the Civil War. Kristen Tegtmeier Oertel\u27s book uses the insights of recent social historians to add depth to this political narrative, thereby strengthening our understanding of how antebellum Kansas changed America. Bleeding Borders begins with a chapter that positions Kansas as a frontier territory. Oertel\u27s antebellum Kansans are divided by race, but not just between white and black. Starting her history in the 1820s, Oertel finds that white settlers\u27 perceptions of and interactions with Kansas Indians played a crucial role in developing white racial identity. Drawing on studies of whiteness, she finds that almost all white settlers compared themselves favorably to both the area\u27s older and more recent Indian nations, setting the stage for her conclusion that white supremacy would be a common belief among whites on both sides of the slavery question. The only exceptions to that rule, she notes, were a handful of white abolitionists who worked with African Americans to stop attempts to bring slavery (and slaves) into the Territory. Oertel\u27s section on the pervasiveness of slave resistance is particularly strong, and the African American efforts against enslavement that she chronicles help to explain both the desperation of the proslavery settlers and their ultimate failure

    Study of electrode phenomena by the cathode ray oscillograph

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    A study of the time of passivation of gold has been made in a series of hydrochloric acid solutions. For a given concentration of hydrochloric acid the equation (i - iâ‚€)T = K holds for all current densities provided the solution is vigorously stirred. This equation is similar to that obtained by Shutt and Walton working at lower current densities. A linear relation has been found to exist between iâ‚€, the limiting current density and the acid concentration. A similar relation also holds between the constant K and the hydrochloric acid concentration. The results obtained have been interpreted on the basis of a diffusion theory. The time of passivation is taken to be the time required to set up a diffusion layer at the electrode surface. The reduction of the chloride concentration at the electrode surface to nearly zero is assumed to be necessary before the passivation of the electrode can take place. Two methods have been given whereby the thickness of the diffusion layer at the electrode can be determined The results are in reasonable agreement with each other and are of the order normally encountered in diffusion phenomena. A reason for the non-application of sand's equation has been suggested

    Fission Yield Measurements from Deuterium-Tritium Fusion Produced Neutrons Using Cyclic Neutron Activation Analysis and Coincidence Counting.

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    The work described in this dissertation used cyclic neutron activation analysis (CNAA) coupled with gamma-gamma coincidence counting with high-purity germanium detectors to measure the independent and cumulative fission yields of short-lived fission products from thorium-232, uranium-235, and uranium-238. Fission yields of short-lived fission products are needed to enhance the precision and expediency of pre- and post-detonation nuclear forensics. The measurements presented in this work illustrate the large differences in the delayed gamma-ray response following a nuclear detonation. The work performed in this dissertation applied non-destructive CNAA using deuterium-tritium fusion produced neutrons to induce fission. Irradiated targets were shuttled from the irradiation position at the face of the neutron generator to a radiation detection system in less than 0.3 seconds using a pneumatic transfer system. Delayed gamma-rays emitted by fission progeny with half-lives on the order of seconds to several minutes were acquired using three high-purity germanium detectors operating in coincidence. Gamma emissions from this timescale exhibit the largest differences in intensity between individual actinides because of order-of-magnitude variations in independent fission yields for fission products at the wings and valley of the fission product distribution curve. Fission product decay data from the listed targets were evaluated to measure the fission yields of arsenic-84, selenium-86, bromine-88, krypton-90 and -92, rubidium-94, strontium-94, -95, and -96, yttrium-96m, zirconium-99, barium-143, and lanthanum-146. Time-dependent gamma-ray spectra were used to measure the fission yields of the listed radioisotopes along with: bromine-86 and -87, krypton-89, yttrium-97m and -99, tellurium-136, iodine-136 metastable and ground states, xenon-138, -139, and -140, cesium-140 and -142, and barium and lanthanum-144. All of the measured fission yields have yet to be experimentally determined, with exception to the noble gases. In the near term, these fission yields will improve the accuracy of the fission yields of fission products with half-lives on the order of hours to days produced by deuterium-tritium fusion neutron induced fission. Better precision in the fission yields of longer lived fission products improves the accuracy of the nuclear forensics process. In the future, these fission yields could aid nuclear forensics analyses from a global array of high-resolution gamma spectrometers.PhDNuclear Engineering and Radiological SciencesUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/133371/1/bpnuke_1.pd

    Some applications of radar return data to the study of terrestrial and oceanic phenomena

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    Side-looking radar spacecraft application to mapping, imagery, altimetry, geology, pedology, glaciology, agriculture, and oceanograph

    Comparing Computing Platforms for Deep Learning on a Humanoid Robot

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    The goal of this study is to test two different computing platforms with respect to their suitability for running deep networks as part of a humanoid robot software system. One of the platforms is the CPU-centered Intel NUC7i7BNH and the other is a NVIDIA Jetson TX2 system that puts more emphasis on GPU processing. The experiments addressed a number of benchmarking tasks including pedestrian detection using deep neural networks. Some of the results were unexpected but demonstrate that platforms exhibit both advantages and disadvantages when taking computational performance and electrical power requirements of such a system into account.Comment: 12 pages, 5 figure
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