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  • Springer  (33)
  • Springer Nature  (4)
  • 2000-2004  (24)
  • 1965-1969  (13)
  • 1
    Electronic Resource
    Electronic Resource
    Effect of interphase interactions on the dielectric behaviour of polycarbonate/poly(styrene-co-acrylonitrile) blends (2000)
    Springer
    Polymer bulletin 44 (2000), S. 555-562 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Frequency and temperature dependences of the complex permittivity ɛ* (=ɛ′−i ɛ″, ɛ′ is the real and ɛ″ imaginary component, respectively) were investigated for blends of polycarbonate/poly(styrene-co-acrylonitrile) (PC/SAN). In the blends, two α-processes corresponding to the main transitions of PC and SAN were found; for SAN at concentrations c SAN≥ 20 wt% and for PC for c PC≥ 40 wt%. The Havriliak-Negami shape parameters describing the frequency dependence of ɛ′ and ɛ″ are virtually independent of temperature and composition. Slight shift of temperature or frequency positions of α-processes found for blends from those found for neat polymers with composition of blends indicated partial miscibility of components. The concentration dependences of ɛ′ and ɛ″ at low frequencies and high temperatures could be described with the Böttcher equation from which it followed that percolation threshold takes place for SAN inclusions at c SAN≈ 30 wt%. Both the reduced dielectric strength ΔɛT and the reduced Onsager term O t/c SAN (or O t/c PC) in dependence on the blend composition could be qualitatively described by the Böttcher equation as well.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890070078
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  • 2
    Electronic Resource
    Electronic Resource
    Virtual Path Design in Service-Specific ATM Networks (2000)
    Springer
    Journal of heuristics 6 (2000), S. 65-83 
    Details
    ISSN: 1572-9397
    Keywords: ATM network management ; virtual paths ; circuit-switching ; multicommodity network optimization ; add drop heuristic for combinatorial optimization problems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract This paper addresses the problem of virtual path management in ATM networks, which is the problem of jointly selecting efficient virtual trunk routes and sizing them to meet end-to-end grade-of-service requirements. The problem is posed over capacitated networks and is formulated as a two-level multi-commodity network flow problem with linear side-constraints (physical layer capacity) and non-linear side constraints (end-to-end/link blocking). Through a variety of examples we show the method (i) generates solutions that agree with engineering judgement, (ii) can solve VP layout management for realistic size networks (of up to 200 nodes) in reasonable time and (iii) provides upper bounds on how far the solution strays from the mathematically optimal design.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009613710108
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  • 3
    Electronic Resource
    Electronic Resource
    UBV observations of post-AGB supergiants and peculiarities of their photometric variability (2000)
    Springer
    Astronomy letters 26 (2000), S. 609-617 
    Details
    ISSN: 1562-6873
    Keywords: stars—supergiants ; variability and evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The systematic UBV observations of six variable post-AGB supergiants in 1991–1999 are presented. Their variability is analyzed. The coolest stars V1027 Cyg and V354 Lac exhibit bimodal pulsations with variable amplitudes. Apart from pulsations, the hotter stars V887 Her and IRAS 19386+0155 show light variations associated with a stellar wind. A variable stellar wind appears to be mainly responsible for the photometric variations in the still hotter stars SAO 163075 and IRAS 20572+4919. Distinct trends in the yearly mean brightness have been found in three of the six supergiants studied, with the trend amplitude being independent of the spectral range. They are interpreted as the result of dust envelopes composed of large grains with R=A V /E(B−V)≥7 becoming optically thin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1307895
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  • 4
    Electronic Resource
    Electronic Resource
    Determination of the density and refractive index of cesium ozonide (1966)
    Springer
    Russian chemical bulletin 15 (1966), S. 2169-2171 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. The density and refractive index of cesium ozonide have been determined for the first time. 2. The taking and grinding of micro samples of cesium ozonide, a substance extremely sensitive to the action of moisture and carbon dioxide and thermally unstable, was effected by means of a special dosing device.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00867730
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  • 5
    Electronic Resource
    Electronic Resource
    Refractivity characteristics of basic metal ozonides (1967)
    Springer
    Russian chemical bulletin 16 (1967), S. 2440-2441 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. Crystals of rubidium ozonide are anisotropic and biaxial, and are characterized by three indices of refraction: Np=1.456, Nm=1.576, Ng=1.750. 2. The density of RbO3 is equal to 2.75 g/cm3. 3. The value of the molecular refraction of the O3 − ion is equal to 11.63 cm3.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00911864
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of heat-treatment on brittleness of ferrite-austenite steels (1965)
    Springer
    Metal science and heat treatment 7 (1965), S. 185-187 
    Details
    ISSN: 1573-8973
    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/BF00658531
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  • 7
    Electronic Resource
    Electronic Resource
    Influence of phase transformations on the ductility of austenitic-ferritic steels (1966)
    Springer
    Metal science and heat treatment 7 (1966), S. 810-813 
    Details
    ISSN: 1573-8973
    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/BF00666972
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  • 8
    Electronic Resource
    Electronic Resource
    Decomposition of δ-ferrite during tempering of steels 08Kh19N9F2S2 and 0Kh20N11M3BT (ÉP89) (1968)
    Springer
    Metal science and heat treatment 10 (1968), S. 361-364 
    Details
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. It was established that the basic scheme of the decomposition of δ-ferrite during tempering of austenitic-ferritic steels is δ→M23C6+δ; δ→γ′+δ; δ→σ+γ″. Depending on the composition of the steel and the heat treatment, any of the three phases may be formed first — M23C6, γ′, or σ. 2. Because of the high rate of embrittlement of steel 0Kh20N11M3BT (particularly cold-worked), slow heating and cooling in the temperature range where σ-phase is formed must be avoided during heat treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00650624
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  • 9
    Electronic Resource
    Electronic Resource
    Structural transformation during heat treatment of steel 1G36Yu6M2 (1968)
    Springer
    Metal science and heat treatment 10 (1968), S. 639-641 
    Details
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. The embrittlement of two-phase steel 1G36Yu6M2 at 650–900°C is due to the formation of a phase with a structure of the β-manganese type. 2. Raising the quenching temperature increases the amount of δ-ferrite, although at 1200–1250°C it decomposes with formation of secondary austenite. 3. The optimal moderating heat treatment for steel 1G36Yu6M2 is quenching from 1000°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00649380
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  • 10
    Electronic Resource
    Electronic Resource
    The nature of hardening and embrittlement of steel 0Kh20N9S2BGTYu (1969)
    Springer
    Metal science and heat treatment 11 (1969), S. 206-208 
    Details
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. Stell 0Kh20N9S2BGTYu has two temperature ranges of embrittlement \t-450–650\dgC and 700–850\dgC. In the high-temperature range \gs phase is formed. In the low-temperature range there is precipitation hardening of the ferritic component. At 500–550°C holding for 5 min results in substantial hardening and a reduction of plasticity, and therefore the temperature of the molten alkali used in pickling should not exceed 420°C. 2. The electron microscopic examination of the samples tempered in the embrittling low-temperature range showed precipitates of intermetallic phase with an ordered cubic structure coinciding crystallographically with the lattice of the matrix (\ga solid solution) but with a lattice parameter (5.7 \0A) double that of the matrix.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00658734
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