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  • 1
    Electronic Resource
    Electronic Resource
    PREDICTION OF THE FATIGUE LIMIT OF CRACKED SPECIMENS BASED ON THE CYCLIC R-CURVE METHOD (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 20 (1997), S. 0 
    Details
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract— The propagation behaviour of fatigue cracks emanating from pre-cracks was numerically simulated to evaluate the development of crack closure with crack growth. The crack opening stress intensity factor at the threshold was approximated as a function of the applied stress and the amount of crack extension. Pre-cracked specimens of a medium-carbon steel with a small surface crack and a single-edge crack were fatigued to investigate experimentally the initiation and propagation of cracks from pre-cracks. Crack closure was dynamically measured by using an interferometric strain/displacement gauge. The threshold condition of crack initiation from pre-cracks was given by a constant value of the effective stress intensity range which was equal to the threshold value for long cracks. The cyclic R-curve was constructed in terms of the threshold value of the maximum stress intensity factor as a function of crack extension approximated on the basis of the experimental and numerical results. The cyclic R-curve method was used to predict the fatigue thresholds of pre-cracked specimens. The predicted values of the fatigue limits for crack initiation and fracture, and the length of non-propagating cracks agreed very well with the experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01497.x
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  • 2
    Electronic Resource
    Electronic Resource
    Mechanistic Aspects of the Interaction of Polyanionic Oligodeoxynucleotides with HL60 Cells (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 660 (1992), 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.1749-6632.1992.tb21097.x
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  • 3
    Electronic Resource
    Electronic Resource
    The 610-780 nm diffuse emission of LiAr and its dynamics study
    Amsterdam : Elsevier
    Optics Communications 83 (1991), S. 310-314 
    Details
    ISSN: 0030-4018
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0030-4018(91)90063-J
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  • 4
    Electronic Resource
    Electronic Resource
    Detailed large-signal dynamic modelling of DFB laser structures and comparison with experiment (1994)
    Springer
    Optical and quantum electronics 26 (1994), S. S817 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract This paper describes the first general large-signal dynamic multiple-mode laser model that incorporates all the main mechanisms known to influence the dynamic behaviour of DFB laser structures with the exception of thermal effects: longitudinal mode spatial hole burning, carrier transport effects, nonlinear gain, and laser and submount parasitics. The time evolution of the output power and wavelength of all modes is predicted, and full spectra can be plotted as a function of time. The model has been extended to include an approximation to the effects of propagation down dispersive fibre, thereby allowing the simulation of filtered received eye diagrams. Detailed comparison of the model with the experimental performance of 2×λ/8 DFB lasers has shown good agreement, allowing the performance to be optimized, particularly with respect to longitudinal hole burning and carrier transport. The model is also applied to gain-switched operation of 2×λ/8 DFB structures, fast pulsing of three-section λ/4 DFB lasers, and the dynamic behaviour of complex coupling coefficient DFB laser structures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00326664
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  • 5
    Electronic Resource
    Electronic Resource
    Regeneration of simon poplar (Populus simonii) from protoplast culture (1995)
    Springer
    Plant cell reports 14 (1995), S. 442-445 
    Details
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Simon poplar (Populus simonii) protoplasts were isolated from suspension cells, with protoplast yield of 3.8×107 g−1 F. W. They were cultured in a K8P liquid medium containing 13.57μM 2,4-D, 1.07μM NAA and 0.93 μM KT. Protoplast culture was influenced by the plating density, osmotic pressure, and the sources and amounts of nitrogen and carbon in the culture medium. Multiple shoots were produced from protoplast-derived callus after culture on MS medium containing 4.44 μM BA, 2.32μM KT, 2.28 μM ZT, and 0.54μM NAA. Shoots 2–3 cm in height were isolated from the calli and rooted on 1/2 MS medium. After transplantation into pots, the regenerated plants grew vigorously in greenhouse.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00234051
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  • 6
    Electronic Resource
    Electronic Resource
    Microstructures of W-Mo functionally graded material (2000)
    Springer
    Journal of materials science 19 (2000), S. 955-958 
    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/10.1023/A:1006712104200
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  • 7
    Electronic Resource
    Electronic Resource
    Residual and working stresses of a TiC/Ni3Al FGM and its structure optimization (1995)
    Springer
    Journal of materials science 14 (1995), S. 1620-1623 
    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/BF00455434
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  • 8
    Electronic Resource
    Electronic Resource
    Adsorption of a new amphoteric cellulosic copolymer onto bentonite (1999)
    Springer
    Colloid & polymer science 277 (1999), S. 499-502 
    Details
    ISSN: 1435-1536
    Keywords: Key words Amphoteric cellulose ; Bentonite ; Adsorption ; Surfactants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The adsorption of a new amphoteric cellulosic copolymer onto bentonite from aqueous solutions was studied at different salt concentrations and temperatures. The adsorption kinetics included a fast step and a slow step. The rate of initial rapid adsorption was reduced by the addition of NaCl. An increase in the concentration of added NaCl or increasing temperature decreased the amounts adsorbed. The influence of sodium dodecylsulfate and hexadecyl trimethylammonium chloride was also studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050416
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  • 9
    Electronic Resource
    Electronic Resource
    Synergistic blends from aqueous solutions of two cellulose derivatives (1999)
    Springer
    Colloid & polymer science 277 (1999), S. 886-890 
    Details
    ISSN: 1435-1536
    Keywords: Key words Synergistic blend ; Carboxymethylcellulose ; Hydroxyethylcellulose ; Viscosity ; Interpolymer complexation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Homogeneous blends of two solutions of carboxymethylcellulose and hydroxyethylcellulose (HEC) were studied with respect to viscosity properties at different blending ratios, shear rates and temperatures. The blends exhibited viscosity synergism at all blending ratios, as well as improved shear and temperature stability. Maximum synergism was observed for the blend containing 67% of HEC. The UV and IR spectra showed that the hydrogen-bonding interaction between the blended components is the main reason for the synergism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050466
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  • 10
    Electronic Resource
    Electronic Resource
    Application of a new family of amphoteric cellulose-based graft copolymers as drilling-mud additives (1999)
    Springer
    Colloid & polymer science 277 (1999), S. 1001-1004 
    Details
    ISSN: 1435-1536
    Keywords: Key words Amphoteric graft copolymer ; Water-soluble cellulose derivative ; Drilling-fluid additive ; Water-based mud ; Oilfield drilling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A new family of amphoteric cellulose-based graft copolymers (CGADs), which were prepared by grafting acrylamide and dimethylaminoethyl methacrylate onto sodium carboxymethyl cellulose, have been investigated for their properties as multifunctional drilling-mud additives with respect to shale inhibition, rheological control and filtrate-loss control. For the CGADs investigated, the shale-inhibition ability improves but the filtration-control ability weakens with increasing content of cationic groups. An increase in the concentration of CGADs results in better inhibition and viscosity-building as well as lower fluid loss. The pH of the medium has an effect on the inhibitive property. A comparative study among CGADs and some commercial polymeric drilling-mud additives was also carried out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050482
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