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  • 1
    Electronic Resource
    Electronic Resource
    Carrier frequency-dependent intrinsic parameters in an ion-implanted silicon photo-MESFET (1987)
    Springer
    Applied physics 44 (1987), S. 361-364 
    Details
    ISSN: 1432-0630
    Keywords: 72.40 ; 78.55 ; 85.30 ; 85.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Carrier frequency-dependent intrinsic parameters of an ion-implanted silicon photo-MESFET have been analysed theoretically. The internal gate source capacitanceC gs is found to increase with increasing carrier frequency under the normally OFF condition and the change is small under the normally ON condition. Also, the internal drain-source resistanceR ds increases with frequency at a fixed flux density and wavelength of operation. The ion-implanted photo-MESFET could become useful as optically controlled switching device in digital circuits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00624604
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  • 2
    Electronic Resource
    Electronic Resource
    Immunodiagnosis and Immunotherapy in Autistic Children (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 540 (1988), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1988.tb27186.x
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  • 3
    Electronic Resource
    Electronic Resource
    High-alumina refractory castables with calcium aluminate binder (1989)
    Springer
    Journal of materials science 8 (1989), S. 424-426 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00720694
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  • 4
    Electronic Resource
    Electronic Resource
    Electrochemical behaviour of AISI 321 stainless steel in methanol-H2SO4 mixtures (1989)
    Springer
    Journal of applied electrochemistry 19 (1989), S. 317-322 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The electrochemical corrosion behaviour (passivity, pitting and repassivation) of austenitic stainless steel AISI 321 containing titanium has been investigated in methanol containing different concentrations of sulphuric acid (0.001–1 M). The cathodic reaction is observed to be hydrogen evolution. Anodic polarization of the stainless steel reveals a characteristic ‘cathodic loop’ in methanol with higher concentrations of H2SO4 (0.1 M and 1 M). A clear and stable passivity is also observed in each solution mixture which breaks down at higher potentials due to pitting. The passivation current, passivity range, pitting intensity and pitting potential are found to vary with variation of acid concentration in the methanol. The kinetics of pitting and the morphology of the pits have been studied. A variation in concentration of acid and scan rate has been found to influence the protection potential of the stainless steel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01015229
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  • 5
    Electronic Resource
    Electronic Resource
    Strong cylindrical magnetogasdynamic shock waves in a rotating interplanetary medium (1984)
    Springer
    Astrophysics and space science 103 (1984), S. 95-98 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Strong cylindrical magnetogasdynamic shock waves in rotating interplanetary medium has been studied and an analytic solution for their propagation has been obtained. Using characteristic method and considering the effect of Coriolis force, we have shown that magnetic field has significant effect on the velocity of the shock wave.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00650047
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  • 6
    Electronic Resource
    Electronic Resource
    Sintering study of calcium aluminate (1996)
    Springer
    Journal of materials science 31 (1996), S. 5163-5168 
    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 Measurement of the initial sintering shrinkage of CaAl2O4 at temperatures of 1300, 1325 and 1350 °C are reported. The particle sizes chosen were −53 + 45, −63 + 53 and −75 + 63 microns and the soaking periods were from 15 to 360 min. A time dependence of the shrinkage has shown that volume diffusion is the dominant mechanism of sintering. At any given time and temperature, the per cent shrinkage was found to be a decreasing function of particle size. The activation energy for the sintering of CaAl2O4 was found to be 766.38 KJ mol−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00355920
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  • 7
    Electronic Resource
    Electronic Resource
    Passivity and pitting of austenic stainless steel AISI 316 in the CH3OH-H2SO4 system (1990)
    Springer
    Journal of materials science 25 (1990), S. 690-696 
    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 passivity and pitting behaviour of AISI 316 stainless steel in methanol containing different concentrations (0.001 to 1 M) of H2SO4 has been investigated by an electrochemical method. Higher concentrations of sulphuric acid have been found to facilitate the passivation process and influence the passivity current and passivation range. The studies reveal the peculiarities of steel pitting and predicts the protective properties of the surface by a process of repassivation in this system. The kinetics of pitting, morphology of the pits and repassivation of the surface have been investigated for this steel. The beneficial effect of molybdenum as an alloying element of steel, on corrosion behaviour has been noticed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00714096
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  • 8
    Electronic Resource
    Electronic Resource
    Correlation between point load index and compressive strength for quartzite rocks (1993)
    Springer
    Geotechnical and geological engineering 11 (1993), S. 269-272 
    Details
    ISSN: 1573-1529
    Keywords: Point load text ; compressive strength ; quartzite rocks
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Summary The relationship of the point load test with uniaxial compressive strength was examined using quartzite rocks to substantiate the existing correlations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00466369
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  • 9
    Electronic Resource
    Electronic Resource
    Controlled blasting in an open-pit mine for improved slope stability (1995)
    Springer
    Geotechnical and geological engineering 13 (1995), S. 51-57 
    Details
    ISSN: 1573-1529
    Keywords: Blasting ; slope ; open-pit ; mine presplitting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Summary A case study is presented where a controlled blasting programme (presplitting) was adopted in an open-pit copper mine in order to improve the stability of the resulting cut slopes. The aim was to reduce over break and minimize damage to the final pit walls from production blasts. The use of presplitting allowed considerably higher benches to be adopted with much steeper overall slope angles. The extra cost of presplitting was fully justified by the improved face stability and the resulting reduction in overburden quantity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00600523
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  • 10
    Electronic Resource
    Electronic Resource
    Optimization of slope angle of a lead-zinc mine (1995)
    Springer
    Geotechnical and geological engineering 13 (1995), S. 143-156 
    Details
    ISSN: 1573-1529
    Keywords: Slope ; rock mass rating ; opencast ; mine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Summary The present study represents an attempt to optimize the overall slope angle of a lead-zinc mine in Rajasthan state, which could extend to a depth of 170 m during the first phase of mining. Detailed geotechnical investigations were conducted. These included geotechnical mapping, determination of the physio-mechanical properties of intact rock, determination of the rock mass rating and estimation of rock mass properties. Information was collected from mapping of benches and borehole logs. Based on these data, limit equilibrium and numerical simulation techniques were applied in order to assess the stability of the slopes and determine an optimum slope angle. From these investigations it has been inferred that the overall footwall and hangingwall slopes should be 42° and 48° respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00456714
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