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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial and engineering chemistry 7 (1968), S. 303-307 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    PO Box 1354, 9600 Garsington Road, Oxford OX4 2XG, UK. : Blackwell Science Ltd
    Fatigue & fracture of engineering materials & structures 28 (2005), S. 0 
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This paper reports results from SICAS, an experimental programme to evaluate the effectiveness of the equivalent initial flaw size (EIFS) approach in managing the structural integrity effects of pitting corrosion. Fatigue crack growth and life tests were conducted on anodized and pre-corroded 7010-T7651. The corrosion pits that initiated fatigue were then measured using the SEM. These data were analysed statistically to identify the pit geometric parameter(s) that influenced fatigue life. Projected pit area had the strongest effect, while pit depth and pit width were each statistically insignificant. The EIFS distribution for corroded 7010-T7651 was then calculated. Examination of the probability distribution of the ratio of EIFS area to pit area allowed the derivation of a scatter factor that gave safely conservative fatigue life predictions for the corroded material.
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 219 (1968), S. 1235-1236 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Results on Cen XR-2 from the flight on October 15 have been published elsewhere1. During the flight on October 24, the instrument was suspended from the balloon with its axis inclined at 40 from the vertical (360 rotation in ~ 8 min) and its field of view had an angular half-width of 17.5. The ...
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 207 (1965), S. 584-587 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WE have determined the positions of three cosmic X-ray sources in the constellations of Scorpio and Sagittarius within uncertainty areas of 1*2-3 square degrees. Positions for these sources were reported earlier by us at the Austin Conference on Relativistic Astrophysics on the basis of a ...
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 223 (1969), S. 162-163 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The detector was launched from Palestine, Texas, and floated at a nominal atmospheric depth of 3-4 g cm2 from 1400 h UT until the payload was cut down near Valdosta, Georgia, at 2X00 h UT. M-87 and the adjacent sky background were observed during the first throe hours of float. Cygnus X-l was ...
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 220 (1968), S. 249-250 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We used four Nal(Tl) scintillation detectors with a total sensitive area of 368 cm2 and an anticoincident jacket of plastic scintillator. The field of view had an angular width of 17-5 at half maximum. The instrument was suspended from the balloon with its axis inclined at 40 from the vertical, and ...
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 205 (1965), S. 554-555 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE angular diameters of the X-ray source regions in the constellations Scorpio and Sagittarius respectively have been investigated in two rocket experiments conducted on August 28, 1964 (flight I), and October 24, 1964 (flight II), at the White Sands Missile Range. These sources were first ...
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    International journal of earth sciences 57 (1968), S. 865-879 
    ISSN: 1437-3262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Abstract From 1960 to August, 1966, the activity of Oldoinyo Lengai took the form of quiet extrusion of carbonatite lava. In August, 1966, the style of activity changed abruptly and violent ash eruptions took place. The activity varied from minor emissions of ash to major Plinian and Vulcanian type eruptions. A new ash-cone built up within the crater and ash was widely distributed on the slopes of the volcano and over the surrounding countryside. The ash consists of sodium carbonate mixed with crystals of nepheline, pyroxene, wollastonite, apatite, melanite and pyrite. Also blocks of ijolite and melteigite were ejected during the activity.
    Abstract: Résumé De 1960 jusqu'en août, 1966, l'activité du volcan Oldoinyo Lengai consistait en coulées tranquilles de lave carbonatitique. En août, 1966, le genre d'activité changea abruptement et de violentes éruptions de cendres se produisirent. L'activité consistait tantôt en de petites émissions de cendres, tantôt en éruptions majeures du genre Plinien et Vulcanien. Un cône neuf de cendres s'amoncelait dans le cratère actif, et les cendres se dispersaient sur le pays environnant. Les cendres se composaient de carbonatite alcaline avec des cristaux de nephéline, pyroxène, wollastonite, melanite et de pyrite. D'ailleurs des blocs d'ijolite et de melteigite furent projetés hors du cratère pendant l'activité.
    Notes: Zusammenfassung Von 1960 bis zum August 1966 bestand die Tätigkeit des Vulkans Oldoinyo Lengai/Ostafrika in ruhigen Lava-Extrusionen. Im August 1966 änderte sich plötzlich die Art seiner Tätigkeit, und heftige Aschenbrüche fanden statt. Diese Tätigkeit variierte von kleineren Ascheneruptionen bis zu größeren Ausbrüchen plinianischen und vulkanischen Typs. Ein neuer Aschenkegel entstand in dem aktiven Krater, und Asche wurde weithin über die Abhänge des Vulkans und über die Umgebung verteilt. Die Asche besteht aus Natrium-Karbonatit mit einer Beimischung von Kristallen von Nephelin, Pyroxen, Wollastonit, Apatit, Melanit und Pyrit. Während des Ausbruchs wurden auch Ijolith- und Melteigitblöcke ausgeworfen.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Solar physics 6 (1969), S. 228-234 
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Very preliminary results for the distribution of γ-rays with energies greater than 50 MeV are presented. Extraterrestrial γ-rays appear to be concentrated to the plane of the galaxy.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 223 (1969), S. 1142-1143 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We adopt as our solution to the problem of deconvolving the source distribution and the detector response function the smallest set of hypothetical discrete sources that accounts for most of the X-ray counts in excess of the background and predicts the observed data with maximum likelihood. Tests ...
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