997 resultados para Europaeus, Daniel E.P
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In a borehole in the southern outskirts of the town of Göttingen, limnic sediments of several Pleistocene warm periods occur intercalated with coarse solifluction debris and gravel of the river Leine. Pollen analysis of the limnic sediments in a borehole at Ottostrasse gave evidence of three warm periods of interglacial character, followed by three interstadial phases. The warm phases are separated one from another by stadial phases with, at least in one case, indications of periglacial solifluction. This sequence belongs to the Brunhes magnetic epoch. The pollen data allow to exclude an Eemian or Holsteinian age of the warm period sediments. Thus a Cromerian age is assumed, though the exact position of the newly described warm periods within the ''Cromerian'' remains uncertain. A section in a borehole at Akazienweg is of Holsteinian age.
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Workflow technology continues to play an important role as a means for specifying and enacting computational experiments in modern science. Reusing and re-purposing workflows allow scientists to do new experiments faster, since the workflows capture useful expertise from others. As workflow libraries grow, scientists face the challenge of finding workflows appropriate for their task, understanding what each workflow does, and reusing relevant portions of a given workflow.We believe that workflows would be easier to understand and reuse if high-level views (abstractions) of their activities were available in workflow libraries. As a first step towards obtaining these abstractions, we report in this paper on the results of a manual analysis performed over a set of real-world scientific workflows from Taverna, Wings, Galaxy and Vistrails. Our analysis has resulted in a set of scientific workflow motifs that outline (i) the kinds of data-intensive activities that are observed in workflows (Data-Operation motifs), and (ii) the different manners in which activities are implemented within workflows (Workflow-Oriented motifs). These motifs are helpful to identify the functionality of the steps in a given workflow, to develop best practices for workflow design, and to develop approaches for automated generation of workflow abstractions.
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This study shows the air flow behavior through the geometry of a freight truck inside a AF6109 wind tunnel with the purpose to predict the speed, pressure and turbulence fields made by the air flow, to decrease the aerodynamic resistance, to calculate the dragging coefficient, to evaluate the aerodynamics of the geometry of the prototype using the CFD technique and to compare the results of the simulation with the results obtained experimentally with the “PETER 739 HAULER” scaled freight truck model located on the floor of the test chamber. The Geometry went through a numerical simulation process using the CFX 5,7. The obtained results showed the behavior of the air flow through the test chamber, and also it showed the variations of speed and pressure at the exit of the chamber and the calculations of the coefficient and the dragging force on the geometry of the freight truck. The evaluation of the aerodynamics showed that the aerodynamic deflector is a device that helped the reduction the dragging produced in a significant way by the air. Furthermore, the dragging coefficient and force on the prototype freight truck could be estimated establishing an incomplete similarity.
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Back Row: John Andrews, Brent Petway, Courtney Sims, Chris Hunter, Amadou Ba, Graham Brown, Ronald Coleman
Front Row: Dani Wohl, Dion Harris, Sherrod Harrell, J.C. Mathis, Lester Abram, Daniel Bell
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The illus. are reproduced from the original ed.
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Originally published, New York : Newell, 1846.
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Bibliography of the works of Daniel Waterland: p. 353-356.
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Edited by Charles Follen.
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"Daniel Schubart": p. [311]-325.
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Back Row: Richard Petrie (Senior Manager), Gerald Williams, Tony Branoff, Louis Baldacci, John Morrow, Edgar Meads, William Kolesar
3rd Row: James Hunt (Trainer), Arthur Walker, Fred Baer, Duncan McDonald, John Veselenak, Raymond Kenaga, Daniel Cline
2nd Row: Edward Hickey, Robert Hurley, Richard Balzhiser, Thad Stanford, Robert Topp, Donald Bennett, Richard Beison
Front Row: Theodore Kress, Donald Dugger, Theodore Cachey, Richard O'Shaughnessy (Captain), Bennie Oosterbaan (head coach), James Balog, Ronald Williams
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back row: George Weitzel, manager Ritter Levinson, George Sibilsky, Harry MacDuff, Carlton Lindstrom, Joseph Bendey, Irving Reynolds
front row: (seated) Waldeck Levi, coach Joseph Barss, captain Daniel Petermann
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Standing L-R: Milton Eskowitz, mngr. Jack Solomon, coach John Johnstone, Joseph Appelt, Daniel Kean
Seated: Harvey Durand, Seymour Siegel, Clinton Sandusky, Howard Kahn, William Bowles
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Top Row: trainer Cassius Cahill, mngr. Roland Taylor, Tharel Kanitz, Frank Lovell, Albert Barley, asst. coach Bennie Oosterbaan, asst. coach Franklin Cappon
Middle Row: Joseph Truskowski, James Orwig, Ernest McCoy, coach George Veenker, Robert Chapman, Daniel Rose
Front Row: Joseph Balsamo, J. Dallas Whittle
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Back Row: Al Willlams, Peter Spitlany, Craig Ghio, Brent Bailey, Sanford Estroff, Blaine Desmarais, Neil Spitalny
Front Row: Charles Burnham, Paul McIntosh, Gary Balliet, coach William Newcomb, Daniel Hunter
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A circumpolar representative and consistent wetland map is required for a range of applications ranging from upscaling of carbon fluxes and pools to climate modelling and wildlife habitat assessment. Currently available data sets lack sufficient accuracy and/or thematic detail in many regions of the Arctic. Synthetic aperture radar (SAR) data from satellites have already been shown to be suitable for wetland mapping. Envisat Advanced SAR (ASAR) provides global medium-resolution data which are examined with particular focus on spatial wetness patterns in this study. It was found that winter minimum backscatter values as well as their differences to summer minimum values reflect vegetation physiognomy units of certain wetness regimes. Low winter backscatter values are mostly found in areas vegetated by plant communities typically for wet regions in the tundra biome, due to low roughness and low volume scattering caused by the predominant vegetation. Summer to winter difference backscatter values, which in contrast to the winter values depend almost solely on soil moisture content, show expected higher values for wet regions. While the approach using difference values would seem more reasonable in order to delineate wetness patterns considering its direct link to soil moisture, it was found that a classification of winter minimum backscatter values is more applicable in tundra regions due to its better separability into wetness classes. Previous approaches for wetland detection have investigated the impact of liquid water in the soil on backscatter conditions. In this study the absence of liquid water is utilized. Owing to a lack of comparable regional to circumpolar data with respect to thematic detail, a potential wetland map cannot directly be validated; however, one might claim the validity of such a product by comparison with vegetation maps, which hold some information on the wetness status of certain classes. It was shown that the Envisat ASAR-derived classes are related to wetland classes of conventional vegetation maps, indicating its applicability; 30% of the land area north of the treeline was identified as wetland while conventional maps recorded 1-7%.