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  • Articles  (31)
  • 1980-1984  (31)
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (27)
  • Sociology
  • Technology
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  • Articles  (31)
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  • 1
    Electronic Resource
    Electronic Resource
    BALANCE OF PAYMENTS DISTURBANCES AND THE DEBT OF THE NON-OIL LESS DEVELOPED COUNTRIES: RETROSPECT AND PROSPECT (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Kyklos 33 (1980), S. 0 
    Details
    ISSN: 1467-6435
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Sociology , Economics
    Notes: The paper identifies the disturbances in the balance of payments of the non-oil less developed countries responsible for the rapid growth in their external debt between 1972 and 1977. It also examines prospects for the future. It finds that the sharp growth in the current account deficits in the years 1974 and 1975 was due primarily to adverse movements in the terms of trade. But trade terms were reversed in 1976 and 1977 and the deficit was reduced. Still overall inflation, slow export growth, and large interest payments kept the deficit substantially above the 1972 and earlier levels. In part II the paper examines how the debt to GNP ratio of the LDC's could be affected by four factors: export growth, changes in real interest rates, terms of trade, and credit rationing. A model is developed which shows that certain combinations of the four factors could lead to rapid accumulation of debt relative to GNP.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-6435.1980.tb02644.x
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  • 2
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    Rewriting Vietnamese History (1980)
    London : Periodicals Archive Online (PAO)
    Journal of contemporary Asia. 10:3 (1980) 286 
    Details
    ISSN: 0047-2336
    Topics: History , Political Science , Sociology , Economics
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:f626-1980-010-03-000005
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  • 3
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    Agrarian Differentiation in the Southern Region of Vietnam (1984)
    London : Periodicals Archive Online (PAO)
    Journal of contemporary Asia. 14:3 (1984) 283 
    Details
    ISSN: 0047-2336
    Topics: History , Political Science , Sociology , Economics
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:f626-1984-014-03-000002
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  • 4
    Electronic Resource
    Electronic Resource
    Stimulated raman scattering up to 10 orders in an optical fiber (1981)
    Springer
    Applied physics 24 (1981), S. 303-306 
    Details
    ISSN: 1432-0630
    Keywords: 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract This paper describes the experimental investigation of stimulated Raman scattering obtained from a multimode fiber. 10 orders of stimulated Stokes scattering of wavelengths in the 546–702 nm region were obtained from a 480m multimode, low-loss, graded-index quartz fiber pumped by a 532 nm frequency-doubled YAG-Nd laser beam with a pulse duration of 7 ns, output power of 0.7 MW and repetition rates of 5 and 10 pps.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00899726
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  • 5
    Electronic Resource
    Electronic Resource
    Subregion generalized variational principles for elastic thick plates (1983)
    Springer
    Applied mathematics and mechanics 4 (1983), S. 175-184 
    Details
    ISSN: 1573-2754
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Mathematics , Physics
    Notes: Abstract In this paper, the subregion generalized variational principle for elastic thick plates is proposed. Its main points may be stated as follows: 1. Each subregion may be assigned arbitrarily as a potential region or complementary region. The subregion variational principles of potential energy, complementary energy and mixed energy represent three special forms of this principle. 2. The number of independent variational variables in each subregion may be assigned arbitrarily. Any one of the subregions may be assigned, as a one-variable-region, two-variable-region or three-variable-region. 3. The conjunction conditions of displacements and stresses on each interline of neighbouring subregions may be relaxed. On the basis of this principle the finite element analysis of non-conforming elements for thick plates can be formulated. Different finite element models for thick plates can be obtained by different applications of this principle. In particular, the subregion mixed variational principle for thick plates may be applied to formulating the subregion mixed finite element method for thick plates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01895442
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  • 6
    Electronic Resource
    Electronic Resource
    Analysis of shallow spherical shell with circular base under eccentrically applied concentrated loads (1981)
    Springer
    Applied mathematics and mechanics 2 (1981), S. 679-698 
    Details
    ISSN: 1573-2754
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Mathematics , Physics
    Notes: Abstract In this paper, problems of a shallow spherical shell with circular base under eccentrically applied concentrated loads are discussed. The solutions for six cases of eccentrically applied concentrated loads are given, namely: (1) Normal concentrated load, (2) Meridional tangential concentrated load, (3) Circumferential tangential concentrated load, (4) Concentrated moment in the tangential plane, (5) Concentrated moment in the meridional normal plane, (6) Concentrated moment in the circumferential normal plane. From the solutions of concentrated loads, the solutions of distributed line loads in the form of cosnθ along the circle are obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01897640
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  • 7
    Electronic Resource
    Electronic Resource
    Pansymmetry and fixed pansystems theorems (1984)
    Springer
    Applied mathematics and mechanics 5 (1984), S. 1715-1720 
    Details
    ISSN: 1573-2754
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Mathematics , Physics
    Notes: Abstract In this paper, we continue the research of fixed pansystems theorems presented in ref [1], and discuss the existence, the structure and the number of fixed subsets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01897947
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  • 8
    Electronic Resource
    Electronic Resource
    Determination of pendant allyl and monomer content in polydiallylphthalate (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 29 (1984), S. 407-411 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Methods are described for the determination of diallylphthalate monomer and pendant allyl contents in homopolymers of diallylphthalate. The monomer content was determined by gel permeation chromatography. The total allyl content was determined by FTIR and computer subtraction of solvent spectrum. The pendent allyl content can be calculated from the difference between total allyl and allyl caused by monomer. Determination of both monomer and pendant allyl content in the prepolymer is essential for accurate prediction of the physical properties of the cured polymer.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1984.070290138
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  • 9
    Electronic Resource
    Electronic Resource
    Epoxy resin cure. II. FTIR analysis (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 29 (1984), S. 3713-3726 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Fourier transform infrared (FTIR) spectroscopy is used to determine the cure rate of an epoxy resin consisting of Tetraglycidyl-4,4′-diaminodiphenyl methane (TGDDM) and diaminodiphenylsulfone (DDS). Cure rates at 120 and 160°C are shown to increase noticeably when 1% BF3-MEA is added to either TGDDM to TGDDM plus DDS. Fluoroboric acid is shown to increase the cure rates even more than the BF3-MEA. These Results combined with the NMR results in the accompanying article indicate that BF3-MEA is not a catalyst for epoxy resin cure. Instead it is rapidly hydrolyzed to fluoroboric acid which acts as the catalyst.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1984.070291207
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  • 10
    Electronic Resource
    Electronic Resource
    Dynamic mechanial properties of sulfonated cyclized cis-1,4-polyisoprene (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 27 (1982), S. 657-671 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Acetyl sulfate was used as sulfonating agent for the sulfonation of cis-1,4-polyisoprene. IR and NMR spectra showed that the sulfonation was accompanied by extensive cyclization. A series of DSC and loss tangent studies of both the sodium salts and the methyl esters was undertaken. It was found that cyclization exerts a profound influence on the micrbrownian segmental motion of the hydrocarbon matrix and is the dominant factor in raising the glass transition temperatures. However, the differences in the mechanical properties between salts and esters suggest that the presence of ions does influence the melt viscosities and shear moduli of the sulfonated cyclized rubbers; this influence can be minimized by esterification or water absorption. It is seen that the ionic effects in these materials are quite typical of those encountered in a wide range of other ionomers.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1982.070270229
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