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Three-dimensional Numerical Investigation of Electron Transport with Rotating Spoke in a Cylindrical Anode Layer Hall Plasma Accelerator

Description: The oscillation behavior described in [Tang et. al, Phys. Plasmas 19, 073519 (2012)] di ers too greatly from previous experimental and numerical studies to claim observation of the same phenomenon. Most signi cantly, the rotation velocity in [Tang et. al, Phys. Plasmas 19, 073519 (2012)] is three orders of magnitude larger than that of typical \rotating spoke" phenomena. Several physical and numerical considerations are presented to more accurately understand the numerical results of [Tang… more
Date: August 27, 1012
Creator: Ellison, C. Leland; Matyash, K.; Parker, J. B.; Raitses, Y. & Fisch, N. J.
Item Type: Refine your search to only Report

An die deutschen frauen!

Description: Instructions to the women of Germany, urging them to provide assistance and support in the war effort. Text is in a medieval-style font.
Date: August 6, 1914
Creator: Auguste Viktoria, Empress, consort of William II, German Emperor, 1858-1921.
Item Type: Refine your search to only Poster
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Some Engineering Problems of the Panama Canal in Their Relation to Geology and Topography

Description: Report issued by the Bureau of Mines over issues encountered during construction of the Panama Canal. As stated in the introduction, "this report aims to discuss, from the viewpoint of the mining geologist, the bearing of topographic and geologic conditions on certain problems that arose in the construction of the Panama Canal" (p. 7). This report includes tables, maps, illustrations, and photographs.
Date: August 1915
Creator: MacDonald, Donald F.
Item Type: Refine your search to only Report
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Destroy the Common Barberry

Description: Discusses the importance of eradicating the common barberry bush in order to prevent the spread of the disease black stem rust to wheat, oats, barley, rye, and wild grasses. Farmers are advised to dig up all common barberry bushes; however, Japanese barberry bushes are harmless and can remain, or farmers may even replace common barberry bushes with Japanese barberry bushes.
Date: August 1919
Creator: E. C. (Elvin Charles) Stakman, 1885-1979
Item Type: Refine your search to only Pamphlet
open access

The Problem of the Turbo-Compressor

Description: "In terminating the study of the adaptation of the engine to the airplane, we will examine the problem of the turbo-compressor, the first realization of which dates from the war; this will form an addition to the indications already given on supercharging at various altitudes. This subject is of great importance for the application of the turbo-compressor worked by the exhaust gases. Assuming that the increase of pressure in the admission manifold is the same in both cases, the pressure in the … more
Date: August 1920
Creator: Devillers, René
Item Type: Refine your search to only Report
open access

Soaring Flight in Guinea

Description: Report discusses information obtained from studying large birds that fly by soaring, which involves using the wind without moving their wings. An Egyptian vulture and African white-backed vulture were observed and their relative air speed, upward air velocity, lift, and drag were noted. The experimental methods for measuring these values are described.
Date: August 1920
Creator: Idrac, Pierre
Item Type: Refine your search to only Report
open access

Theory of Lifting Surfaces, Part 2

Description: A mathematical model is presented towards a theory of lifting and resistance on wings. It consists hide of a theory of multiplanes, conditions of flow at a great distance from the wing, lifting systems of minimum resistance, and free stream and stream limited by walls.
Date: August 1920
Creator: Prandtl, L.
Item Type: Refine your search to only Report
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The Employment of Airships for the Transport of Passengers: Indications on the Maximum Limits of Their Useful Load, Distance Covered, Altitude and Speed

Description: It was a conclusion of this detailed study of the practicality of using airships for carrying passengers that, although slow, airships are capable of carrying useful loads over long distances. However, it is noted that there is a certain limit to the advantages of large cubature. Beyond a certain point, the maximum altitude of the airship goes on decreasing, in spite of the fact that the range of action in the horizontal plane and the useful load go on increasing. The possibility of rapid climb… more
Date: August 1921
Creator: Nobile, Umberto
Item Type: Refine your search to only Report
open access

Gas Masks for Gases Met in Fighting Fires

Description: Technical paper issued by the Bureau of Mines over the development of gas masks designed for fighting fires. The characteristics of the different types of masks in development are presented. This paper includes tables, illustrations, and photographs.
Date: August 1921
Creator: Fieldner, Arno Carl; Katz, Sidney H. & Kinney, Selwyne P.
Item Type: Refine your search to only Report
open access

Large German airship stations

Description: "It is profitable to examine the organization and equipment of the German airship stations. The stations best adapted for serving as the basis of this study were chiefly constructed by the German Navy, during the war, for exclusively military purposes and do not therefore entirely satisfy the conditions of exploitation required for a civilian air service. The requisite modifications for satisfying the latter conditions may nevertheless be readily determined according to circumstances" (p. 1).
Date: August 1921
Creator: Sabatier, J.
Item Type: Refine your search to only Report
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