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  • 1
    Electronic Resource
    Electronic Resource
    Lattice parameter and optical-energy gap values for Cd x Zn y Mn z Te alloys (1983)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 2 (1983), S. 1911-1918 
    Details
    ISSN: 0392-6737
    Keywords: X-ray determination of structures
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Campioni policristallini di leghe di Cd x Zn y Mn z Te (x+y+z)=1 sono stati prodotti con una tecnica di funsione e di tempra, temprando a 800°C per due settimane per dare buone condizioni di equilibrio. Fotografie con polvere ai raggi X secondo Debye-Scherrer sono state usate per determinare i valori del parametro di reticoloa e l'intervallo della soluzione solida nella fase di zincoblenda. L'intervallo per la soluzione solida determinato è in buon accordo con i valori precedenti per sistemi pseudobinari Cd1−z Mn z Te e Zn1−z Mn z Te. Misurazioni a temperatura ambiente dell'assorbimento ottico e della riflettanza modulata sono state fatte per dare valori del gap di energiaE 0 in funzione della composizione. La variazione dei parametria edE 0 al variare della composizione è stata adattata ad un'adeguata equazione empirica, l'accuratezza dell'approssimazione è state migliore della diffusione media sperimentale. Dai parametri approssimati, i contorni cona costate edE 0 costante sono stati dedotti.
    Notes: Summary Polycrystalline samples of Cd x Zn y Mn z Te alloys (x+y+z=1) were produced by a melt and anneal technique, by annealing at 800°C for 2 weeks giving good equilibrium conditions. Debye-Scherrer X-ray powder photographs were used to determine values of the lattice parametera and the range of solid solution in the zincblende phase. The range of solid solution determined is in good agreement with the previous values for the pseudobinary systems Cd1−x Mn z Te and Zn1−z Mn z Te. Room temperature measurements of optical absorption and modulated reflectance were made to give values of the energy gapE 0 as functions of composition. The variation of the parametersa andE 0 with composition is fitted to a suitable empirical equation, the accuracy of fitting was better than the average experimental scatter. From the fitted parameters, contours of constanta and of constantE 0 were drawn.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02457886
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  • 2
    Electronic Resource
    Electronic Resource
    Static and dynamic single-crystal x-ray diffraction studies of some solid-state photodimerization reactions (1981)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 85 (1981), S. 3636-3642 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j150624a022
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  • 3
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    Massignon, tr. by Mason: The Passion of al-Hallaj: Mystic and Martyr of Islam (Book Review) (1984)
    Washington : Periodicals Archive Online (PAO)
    Middle East Journal. 38:2 (1984:Spring) 343 
    Details
    ISSN: 0026-3141
    Topics: Ethnic Sciences , History , Political Science , Sociology , Economics
    Description / Table of Contents: ISLAM
    Notes: "BOOK REVIEWS"
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:1158-1984-038-02-000045
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  • 4
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    Nationalism and Colonialism in Modern India (Book Review) (1982)
    London : Periodicals Archive Online (PAO)
    Journal of contemporary Asia. 12:2 (1982) 236 
    Details
    ISSN: 0047-2336
    Topics: History , Political Science , Sociology , Economics
    Notes: Reviews
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:f626-1982-012-02-000010
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  • 5
    Electronic Resource
    Electronic Resource
    Concrete crack depth meter using nonlinear ADC (1984)
    Springer
    Journal of nondestructive evaluation 4 (1984), S. 127-131 
    Details
    ISSN: 1573-4862
    Keywords: Concrete NDT ; NL-ADC ; crack depth measurement ; NDE
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract This paper introduces the design and construction of an electronic hybrid signal processing meter that develops an output voltage proportional to the depth of a concrete crack. The circuit employs multiplication, squaring, and square-rooting functions by means of a special nonlinear ADC and counting scheme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00566217
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  • 6
    Electronic Resource
    Electronic Resource
    Magic angle spinning29Si and27Al NMR study of mordenite dealumination (1983)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 1 (1983), S. 193-198 
    Details
    ISSN: 1573-1111
    Keywords: Magic angle spinning29Si NMR ; magic angle spinning27Al NMR ; sodium mordenite ; zeolites ; 22736
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Magic angle spinning29Si NMR presents a rapid qualitative method of assessing the degree of dealumination of sodium mordenite modified by acid leaching and heat treatment. A quantitative determination of the29Si coordination sphere is hampered by the overlap of chemical shift ranges for Si−O−Al and Si−O−H species. MAS27Al NMR indicates the presence of octahedrally coordinated Al in interstitial sites in all treated samples. On treating mordenite samples at high temperatures (∼700°C) much of the Al becomes invisible to the NMR experiment because of its location in sites of low symmetry and large quadrupole coupling constant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00656822
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  • 7
    Electronic Resource
    Electronic Resource
    Exchange ofA 1 andZ 1 (J PC=2−−) mesons in charged pion photoproduction (1981)
    Springer
    The European physical journal 10 (1981), S. 263-266 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Finite energy sum rules are evaluated for the amplitudes corresponding to the exchange of theA 1 and its exchange degenerate partner, theZ 1 (J PC=2−−), in charged pion photoproduction. Both sum rules are roughly compatible with theoretical estimates of these exchanges, and a definiteA 1 signal found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01549734
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  • 8
    Electronic Resource
    Electronic Resource
    Crystal and molecular structures of 2-(p-methylbenzyl)- and 2-(p-chlorobenzyl)-5-(p-bromobenzylidene)cyclopentanone. Influence of chloro and methyl substitution on solid-state reactivity (1982)
    Springer
    Journal of chemical crystallography 12 (1982), S. 377-389 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The crystal structures of the title compounds have been determined as part of an investigation into the factors which may influence the solid-state reactivity of benzylidene cyclopentanones. Thep-methyl derivative, which is photoactive in the crystalline state, in monoclinic:P21/c,a=18.381(2),b=11.209(2),c=8.285(2) Å,β=94.46(12)°, andz=4. The chloro derivative, which is photostable, is also monoclinic:P21/c,a=17.522(4),b=7.906(2),c=11.888(2) Å,β=91.19(14)°, andz=4. The structures were solved and developed via the heavy-atom method and refined by least-squares to finalR values of 0.062 and 0.061, respectively, using 1902 and 2356 observed reflections measured using an automatic diffractometer. The conformations of the two molecules in their crystal structures are significantly different and lead to dissimilar packing arrangements, which clearly account for the different photochemical behaviors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01159054
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  • 9
    Electronic Resource
    Electronic Resource
    Adhesion of ice to a flexible substrate (1984)
    Springer
    Journal of materials science 19 (1984), S. 73-81 
    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 The adhesion of ice to a flexible substrate, polyurethane elastomer, has been studied using the Andrews-Stevenson test procedure which involves the pressurization to failure of an enclosed interfacial crack. The temperature, rate of pressurization and substrate layer thickness were varied and the failure energy (critical energy release rate) determined. If energy release from the flexible substrate is ignored an apparent failure energy is obtained which first increases and then decreases as the layer thickness rises from zero to 4 mm. This thickness effect results in a large variation in the pressure needed to produce failure, and is thus important in relation to the ice-release properties of the substrate. It is shown that the thickness effect can be explained quantitatively in terms of the energy release from the flexible substrate, which, in turn, depends on its visco-elastic properties. The true failure energy is derived and is also found to correlate with the visco-elastic response of the rubber. Finally, these ideas are used to explain the effects of rate and temperature on the conditions of failure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00552995
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  • 10
    Electronic Resource
    Electronic Resource
    Adhesion of ice to a flexible substrate (1984)
    Springer
    Journal of materials science 19 (1984), S. 73-81 
    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 The adhesion of ice to a flexible substrate, polyurethane elastomer, has been studied using the Andrews-Stevenson test procedure which involves the pressurization to failure of an enclosed interfacial crack. The temperature, rate of pressurization and substrate layer thickness were varied and the failure energy (critical energy release rate) determined. If energy release from the flexible substrate is ignored an apparent failure energy is obtained which first increases and then decreases as the layer thickness rises from zero to 4 mm. This thickness effect results in a large variation in the pressure needed to produce failure, and is thus important in relation to the ice-release properties of the substrate. It is shown that the thickness effect can be explained quantitatively in terms of the energy release from the flexible substrate, which, in turn, depends on its visco-elastic properties. The true failure energy is derived and is also found to correlate with the visco-elastic response of the rubber. Finally, these ideas are used to explain the effects of rate and temperature on the conditions of failure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02403112
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