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  • 1
    Electronic Resource
    Electronic Resource
    A Program-Oriented General Process Simulator (1972)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 11 (1972), S. 179-183 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/i260042a005
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  • 2
    Electronic Resource
    Electronic Resource
    Evidence on the locomotor pattern of Homo from early Pleistocene of Kenya (1974)
    [s.l.] : Nature Publishing Group
    Nature 251 (1974), S. 135-136 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The specimen, KNM-ER813 (ref. 1), is a well preserved right talus; details of its morphology have been described and illustrated elsewhere2. It was recovered from beds between tuffaceous horizons that have been correlated with tuffs dated at 2.61 ±0.26 and 1.57±0.00 million yr (Myr) ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/251135a0
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  • 3
    Electronic Resource
    Electronic Resource
    Main, Jackson Turner: Political Parties before the Constitution : Chapel Hill, The University of North Carolina Press, for the Institute of Early American History and Culture at Williamsburg, Virginia, 1973 (1974)
    Cambridge : Cambridge University Press
    Journal of American studies 8 (1974), S. 116-117 
    Details
    ISSN: 0021-8758
    Source: Cambridge Journals Digital Archives
    Topics: English, American Studies , History , Political Science , Sociology , Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0021875800013803
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  • 4
    Electronic Resource
    Electronic Resource
    Locomotor Affinities of Hominoid Tali from Kenya (1973)
    [s.l.] : Nature Publishing Group
    Nature 246 (1973), S. 45-46 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Plot of canonical axes I and II. Circles are drawn with a radius of two eigenvalues. 1, Gorilla; 2, Pan; 3, Papio; 4, Cercopithecus (mono, and nictitans)\ 5, Colobus; 6, Pongo. The object of the earlier work was to test the hypothesis, formulated by the late L. S. B. Leakey3, that two tali, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/246045a0
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  • 5
    Electronic Resource
    Electronic Resource
    Early hominid ulna from the Omo basin, Ethiopia (1974)
    [s.l.] : Nature Publishing Group
    Nature 249 (1974), S. 174-176 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The specimen (see Fig. 1) has been damaged both before and after fossilisation and the surface bone has many linear cracks, some of which are more than 1 mm wide and are filled with matrix. The shaft is broken in five places and at the distal three sites it has been possible to reassemble the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/249174a0
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  • 6
    Electronic Resource
    Electronic Resource
    An isotope dilution method for the determination of dissolved carbon dioxide (1974)
    Springer
    Cellular and molecular life sciences 30 (1974), S. 970-972 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Riassunto Si descrive un metodo per determinare il contenuto di anidride carbonica dell'acqua, che prevede il passaggio del CO2 dall'acqua attraverso una membrana di lattice ad una soluzione alcalina dove la variazione di conduttività e radioattività viene misurata e usata per calcolare il livello di CO2 del campione d'acqua.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01938393
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  • 7
    Electronic Resource
    Electronic Resource
    P total, $$P_{H_2 O} $$ and the occurrence of cummingtonite in volcanic rocks (1973)
    Springer
    Contributions to mineralogy and petrology 40 (1973), S. 149-158 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The phenocryst assemblage of cummingtonite, orthopyroxene, quartz, titanomagnetite and ilmenite in rhyolites of New Zealand has been used to calculate P total and $$P_{H_2 O} $$ . The values of P total and $$P_{H_2 O} $$ depend strongly upon whether an ideal mixing, or an ordered, model is used for the solid-solutions, but in both cases $$P_{H_2 O} $$ ≈P total. The rhyolite magma contained over 9 per cent water (by weight) when the cummingtonite phenocrysts precipitated, and possibly as much as 12 per cent, so that it is surprising that one of these rhyolites is a coherent lava. The calculated values of P total and $$P_{H_2 O} $$ are very sensitive to uncertainty in both the composition of the solid-solutions and temperature. Calculations show that $$P_{H_2 O} $$ 〉0.7–0.8 P total for cummingtonite to precipitate in rhyolites, and that iron-rich olivine and cummingtonite could only exist in rhyolites over a small temperature range at a pressure near 5 kilobars. Hornblende phenocrysts co-existing with fayalitic olivine in rhyolites accordingly have a very low activity of Mg7Si8O22(OH)2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00378172
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  • 8
    Electronic Resource
    Electronic Resource
    Series to sequence and series to series transformations in Frechet spaces (1970)
    Springer
    Mathematische Annalen 184 (1970), S. 224-232 
    Details
    ISSN: 1432-1807
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01351566
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  • 9
    Electronic Resource
    Electronic Resource
    Stress relaxation in beryllia (1971)
    Springer
    Journal of materials science 6 (1971), S. 281-288 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Beryllia beams were loaded at temperature in four-point bending to a deflection of 0.001 in. or 0.002 in. and the decrease in load necessary to maintain the deflection constant was measured as a function of time. The beryllia was fine-grained, in the range ∼ 1 to 7μm, and the porosity varied between 3 and 21%. The test conditions covered a temperature range of 850 to 1240°C, experiments took from 10 min to 8 h: the loads used produced initial maximum outer fibre stresses of the order 3000 to 6000 psi. A method was developed for calculating the stress distribution in a beam at any time and this was used to analyse the results. The stress relaxation process was found to be stress-activated, and the conversion of elastic to plastic strain could be expressed as a creep law having the form $$\dot \in = k_0 exp \left( {\frac{{ - Q}}{{RT}}} \right) exp \left( {\frac{{Cv\sigma }}{{RT}}} \right)$$ . The activation energy was 100 ± 2 kcal mole−1 and the activation volume was large, probably of the order of 103 atoms. The rate constantk 0 was approximately proportional to the fraction of intergranular porosity and inversely proportional to the cube of the grain diameter. It is suggested that the mechanism of grain boundary sliding is consistent with the observations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02403093
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  • 10
    Electronic Resource
    Electronic Resource
    Stress relaxation in beryllia (1971)
    Springer
    Journal of materials science 6 (1971), S. 281-288 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Beryllia beams were loaded at temperature in four-point bending to a deflection of 0.001 in. or 0.002 in. and the decrease in load necessary to maintain the deflection constant was measured as a function of time. The beryllia was fine-grained, in the range ∼ 1 to 7μm, and the porosity varied between 3 and 21%. The test conditions covered a temperature range of 850 to 1240°C, experiments took from 10 min to 8 h: the loads used produced initial maximum outer fibre stresses of the order 3000 to 6000 psi. A method was developed for calculating the stress distribution in a beam at any time and this was used to analyse the results. The stress relaxation process was found to be stress-activated, and the conversion of elastic to plastic strain could be expressed as a creep law having the form $$\dot \in = k_0 exp \left( {\frac{{ - Q}}{{RT}}} \right) exp \left( {\frac{{Cv\sigma }}{{RT}}} \right)$$ . The activation energy was 100 ± 2 kcal mole−1 and the activation volume was large, probably of the order of 103 atoms. The rate constantk 0 was approximately proportional to the fraction of intergranular porosity and inversely proportional to the cube of the grain diameter. It is suggested that the mechanism of grain boundary sliding is consistent with the observations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00553583
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