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  • 2005-2009  (8)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Phase Transformation Modeling of Medium-Carbon Forging Steel (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 2443-2448 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The kinetics of phase transformations in medium-carbon forging steels (MCFS) have beenmodeled based on CALPHAD multicomponent thermodynamics and the classical nucleation-growththeory. New treatments include the time dependency of parabolic growth rate of proeutectoid ferrite(α) , which account for the soft impingement effect by carbon enrichment in austenite (γ). And apotential transition of γ/α interface equilibrium has also been considered depending on temperaturesand velocity of the moving interface. To make a realistic prediction of the onset of pearlite (P)transformation, a normal distribution of γ grain size has been assumed and successive α→Ptransformation kinetics in each grain size have been summated.The developed program coupled with thermodynamic solver, 'ThermoCalc', calculated the isothermalkinetics of MCFS and has been found to predict well the effect of minor difference of chemicalcomposition / holding temperatures
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.2443.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    HRTEM Study of Nanostructures in Hydrogen-Absorbing Mg-Ni and Mg-Ni-La Alloys Prepared by Melt-Spinning (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 561-565 (Oct. 2007), p. 1629-1632 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The structure of melt-spun and crystallized Mg-10%Ni and Mg-10%Ni-5%La alloys isstudied using HRTEM, coupled with ED and EELS techniques, for specimens subjected tohydrogenation and dehydrogenation. The presence of nano-sized (5-10nm) Mg2Ni grains dispersedin the matrix of Mg nano-grains is observed before hydrogenation. This structure is almostpreserved after hydrogenation and dehydrogenation at 300°C. In the hydrogenated specimen,nanoboundaries lying between MgH2 and Mg2NiH4 nano-grains are observed. They appear toprovide main routes for the hydrogen transport in these nanostructured materials
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.1629.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Continuous Three-Dimensional Examination of Interior Hair Structure (2005)
    Oxford, UK : Blackwell Science Ltd
    International journal of cosmetic science 27 (2005), S. 0 
    Details
    ISSN: 1468-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The ability to continuously examine the interior hair structure throughout a treatment process is very important in designing effective hair products. Microscopy is commonly used to observe the interior of hair, but this method requires a sliced sample, making continuous observation impossible. Use of X-ray computed tomography (CT) as a non-destructive measurement has been proposed, but this method has a disadvantage in that it is impossible to obtain full-color interior images of the sample. Thus, a non-destructive method for continuous, full-color examination of the interior hair structure has been lacking. In this study a new method is proposed that enables non-destructive and continuous measurement of the interior hair structure with color information. In our method, optical CT is used for reconstruction of the interior hair structure. Our new theories enabled us to solve the crucial problem of the large observational error of traditional optical CT systems caused by internal light scattering and to make its practical application possible. A new optical CT system based on our method was implemented. This system displayed sufficient accuracy when the phantom image was measured, and clear and full-color cross-sectional images were obtained without destruction of the sample when human hair was observed. When the bleaching and dyeing processes were continuously measured, changes in the interior hair with time could be observed. These results clearly indicate that our new method provides a powerful tool for research and product development.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1463-1318.2005.00268_1.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Abrupt onset of a second energy gap at the superconducting transition of underdoped Bi2212 (2007)
    [s.l.] : Nature Publishing Group
    Nature 450 (2007), S. 81-84 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The superconducting gap—an energy scale tied to the superconducting phenomena—opens on the Fermi surface at the superconducting transition temperature (Tc) in conventional BCS superconductors. In underdoped high-Tc superconducting copper oxides, a ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature06219
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  • 5
    Electronic Resource
    Electronic Resource
    The first case of cutaneous mucormycosis caused by Rhizopus azygosporus (2005)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 153 (2005), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A rapidly enlarging leg ulcer appeared in a 54-year-old woman with systemic lupus erythematosus receiving aggressive immunosuppressive therapy. Skin biopsy revealed proliferation of hyphae in the midst of a neutrophilic abscess. Culture yielded Rhizopus azygosporus. As no organ involvement was detected by thorough examination, the patient was diagnosed as having primary cutaneous mucormycosis. Although intravenous amphotericin B therapy seemed to be very effective, it had to be discontinued due to nephrotoxicity. She unfortunately died of subsequent disseminated fungal infection and cerebral infarction in which the primary cause could not be determined. Minimum inhibitory concentrations of several antifungal drugs to the isolate were examined and amphotericin B proved to be the only agent that may potentially reach the effective plasma concentration. This is the first case report of cutaneous mucormycosis caused by R. azygosporus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.2005.06593.x
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Large-scale DNA microarray analysis of atopic skin lesions shows overexpression of an epidermal differentiation gene cluster in the alternative pathway and lack of protective gene expression in the cornified envelope (2005)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 152 (2005), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background  Atopic dermatitis (AD)-specific genes have not yet been clarified.Objectives  To identify gene expression specific to active atopic skin lesions.Methods  We analysed 23 000 genes in skin biopsy samples from 17 patients with AD and four normal controls using Affymetrix oligonucleotide arrays.Results  Four of the 10 genes with the greatest differences in expression between patients and controls, S100A8 and S100A7 (upregulated), and loricrin and filaggrin (downregulated), were epidermal differentiation genes located on 1q21, a locus previously reported to have a genetic linkage with AD.Conclusions  Our results, showing downregulation of the cornified envelope genes and upregulation of the alternative keratinization pathway, are the first to suggest abnormal epidermal differentiation and defective defences as key abnormalities in AD.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.2005.06352.x
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  • 7
    Electronic Resource
    Electronic Resource
    Fatigue crack propagation from a precrack under combined torsional and axial loading (2005)
    PO Box 1354, 9600 Garsington Road, Oxford OX4 2XG, UK. : Blackwell Science Ltd
    Fatigue & fracture of engineering materials & structures 28 (2005), 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: Fatigue tests of crack propagation from a precrack in thin-walled tubular specimens made of a medium-carbon steel were performed under cyclic torsion with and without superposed static or cyclic axial loading. The stress ratio of cyclic loading was −1. The fatigue crack-propagation path from a precrack was compared with the predictions based on the maximum tangential stress criterion. The direction of fatigue crack propagation follows the direction of the maximum of the range of the tangential stress, Δσ*θ max, near the crack tip determined from the stress intensity factor (SIF) which was calculated by considering the contacts of crack faces at the minimum load. The SIF calculated from the actual crack path by using the body force method (BFM) showed that the mode II SIF range quickly approached zero after a small amount of crack extension. The crack-propagation rate decreased first and then increased with crack extension. The initial dip of the crack-propagation rate was caused by the development of crack closure with crack extension. As cracks extended a long distance, the propagation rate was faster than the uniaxial data. This acceleration of crack propagation was caused by excessive plasticity near the crack tip.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1460-2695.2005.00861.x
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    In Situ X-Ray Stress Measurement in Electrodeposited Cu Foils under Tensile and Fatigue Loading (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 2395-2398 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Monotonic and cyclic loadings were subjected to electrodeposited copper foils (thickness is8 and 20 μm), and the deformation behavior was observed. In-situ X-ray stress measurement wascarried out under monotonic loading. The tensile strength of 8 μm foil was higher than that of 20 μmfoil. On the other hand, the elongation of 8 μm foil was smaller. When the plastic deformationoccurred, difference between the X-ray stress and the applied stress became large. The difference of20 μm foil was larger than that of 8 μm foil. Fatigue strength of 8 μm foil was also higher than that of20 μm foil. The value of the full width at half maximum, FWHM, increased dramatically at the firstcycle, and then the value became nearly constant. Just before fracture, the value increased again. Thechange in FWHM corresponded to the change in the accumulated ratchet strain
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.2395.pdf
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