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  • 2005-2009
  • 2000-2004  (9)
  • 1995-1999
  • 1975-1979
  • 1925-1929
  • 2002  (9)
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  • 2005-2009
  • 2000-2004  (9)
  • 1995-1999
  • 1975-1979
  • 1925-1929
Year
  • 1
    Electronic Resource
    Electronic Resource
    Local vibrational modes of carbon in GaSb and GaAsSb (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 1942-1944 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have measured the Raman spectra of heavily carbon doped (p〉1019 cm−3) GaSb and GaAsSb. A local vibrational mode (LVM) due to carbon residing on group-V lattice sites was observed at 540 cm−1 for GaSb and 568 cm−1 for GaAs0.44Sb0.56. A gap mode at 164 cm−1 was observed for GaSb. The frequency of the LVM as well as the gap mode is in quantitative agreement with recent theoretical predictions. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1461871
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  • 2
    Electronic Resource
    Electronic Resource
    A SMALL SCALE LABORATORY NOODLE SHEETING MACHINE1 (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of texture studies 33 (2002), S. 0 
    Details
    ISSN: 1745-4603
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Rheological properties of cooked noodles made on a small-scale laboratory sheeting machine developed at the Cereal Research Centre were strongly correlated with the same properties of noodles made on a pilot noodle sheeting machine. Values obtained from both machines were evaluated against 22 laboratory tests used in our breeding program. For example, cooked noodle viscoelasticity (r=0.89, P 〈 0.01) and cooked noodle cutting force (r = 0.79, P 〈 0.01) were similar. Cooked noodle viscoelasticity of fresh noodles made on the laboratory machine correlated significantly (P 〈 0.05) with 17 of the tests and cooked noodle cutting force correlated significantly with 18 tests. Cooked noodle viscoelasticity of dried noodles made with the pilot plant noodle machine had significant correlations (P 〈 0.05) with only 14 of the tests and cooked noodle cutting force had significant correlations with 15 tests. The pilot plant machine requires a minimum of 500 g for one sample, while the small-scale sheeting machine requires only 5-10 g of flour.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-4603.2002.tb01367.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Stokes slip flow through a grid of circular cylinders (2002)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 14 (2002), S. 3358-3360 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The Stokes flow through a row of equally spaced circular cylinders with partial slip on the boundaries is studied by domain decomposition and matching. The pressure drop or resistance across the grid is found for various slip and normalized cylinder radii. Asymptotic formulas are found for sparcely and closely spaced cylinders. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1499127
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    A perturbation solution for a crack in a power-law material under gross yielding (2002)
    Oxford, UK : Blackwell Science, Ltd
    Fatigue & fracture of engineering materials & structures 25 (2002), 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 In order to develop an analytical method for quantifying the plastic-blunting behaviour of a short crack embedded in a notch plastic zone, the perturbation solution of He and Hutchinson is extended to include the effect of strain gradient. An edge-cracked plate subjected to a linearly varying remote strain is considered in this work to simulate the plastic deformation associated with a small crack at a notch root. The strain hardening of the material is assumed to obey a power-law. Comparison with finite-element (FE) computations demonstrates that this perturbation solution provides accurate values for the crack-tip opening displacement (CTOD) under gross-yielding conditions for a range of hardening parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1460-2695.2002.09898.x
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  • 5
    Electronic Resource
    Electronic Resource
    In situ investigation of small fatigue crack growth in poly-crystal and single-crystal aluminium alloys (2002)
    Oxford, UK : Blackwell Science, Ltd
    Fatigue & fracture of engineering materials & structures 25 (2002), 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  In situ scanning electron microscope observations of short crack growth in both a poly-crystal and a single-crystal alloy revealed that fatigue cracks may grow in a shear decohesion mode over a length that is several times the grain size, far beyond the conventional stage I regime. In the poly-crystal aluminium alloy 2024-T351, fatigue cracks were found to continue to grow along one shear band even after two mutually perpendicular shear bands had formed at the crack tip. For the single-crystal alloy specimen with the loading axis being nearly perpendicular to its main shear plane, mode I fatigue cracks were found to grow along the shear band. These two types of fatigue crack growth pose a significant challenge to the existing fatigue crack growth correlating parameters that are based on crack-tip opening displacement. In particular, it has been found that the cyclic crack-tip opening displacement, which accounts for both large-scale yielding and the lack of plasticity-induced crack closure, is unable to unify the growth rates of short and long cracks in aluminium 2024-T351, suggesting a possible dependence of crack growth threshold on crack length.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.8756-758x.2001.00484.x
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Closure of plane-strain cracks under large-scale yielding conditions (2002)
    Oxford, UK : Blackwell Science, Ltd
    Fatigue & fracture of engineering materials & structures 25 (2002), 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  This paper presents computational and theoretical investigations of the plasticity-induced crack-closure of a plane-strain crack under large-scale yielding conditions. Solutions of the crack-tip opening displacements for a stationary crack and a growing fatigue crack have been obtained using the finite element method. The self-similar crack-closure model has been extended to the plane strain case by introducing two plastic constraint factors: one for tension yielding and the other for compression yielding. These two plastic constraint factors are identified by matching the model predictions with the computational results. It is shown that the first constraint factor decreases rapidly with the applied stress while the second constraint factor is approximately equal to unity. The findings of this study allow the cohesive-zone based crack-closure model to be extended to plane-strain cracks, especially under large-scale yielding conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.8756-758x.2002.00483.x
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  • 7
    Electronic Resource
    Electronic Resource
    An assay for quantification of white spot syndrome virus using a capture ELISA (2002)
    Oxford UK : Blackwell Science Ltd
    Journal of fish diseases 25 (2002), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2761.2002.00360.x
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  • 8
    Electronic Resource
    Electronic Resource
    X-ray Absorption Near-Edge Structure of Grain-Boundary-Segregated Y and Zr in Creep-Resistant Alumina (2002)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 85 (2002), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: X-ray absorption near-edge structure (XANES) depends on stereochemical features of coordination polyhedra around probe atoms. K-edge XANES of Y and Zr segregated in alumina grain boundaries has been obtained and analyzed using metallic Y and Zr, Y2O3, YAG, and monoclinic ZrO2 as standards. Grain-boundary-segregated Y and Zr show a positive chemical shift, and the magnitude of the shift, as compared with that of Y2O3 and ZrO2, respectively, is different for Y and Zr, indicating that, relative to Y2O3 and ZrO2, charge transfers for the grain-boundary-segregated Y and Zr are different. This result is also supported by the strength of the threshold resonance. A pre-edge shoulder is seen in K-edge XANES for grain-boundary-segregated Y and Zr but not for Y2O3 and ZrO2. This shoulder is attributed to the 1s→ 4d transition, which is normally forbidden, but can occur because of d–p mixing, which is favored by a tetrahedral coordination configuration. These results suggest that some of the grain-boundary-segregated Y and Zr have coordination configurations with a well-defined tetrahedral symmetry. The XANES results are compared with those obtained from EXAFS. Implications of these results for understanding of the enhanced creep resistance in alumina are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.2002.tb00486.x
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Multiple Epstein–Barr virus-associated subcutaneous angioleiomyomas in a patient with acquired immunodeficiency syndrome (2002)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 147 (2002), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Tumours of smooth muscle origin, either solitary or multiple, are occasionally found in immunocompromised patients, particularly in children with acquired immunodeficiency syndrome (AIDS). Most of the reported AIDS-associated leiomyomatous neoplasms have been found in the visceral organs, and the tumour cells all possessed the Epstein–Barr virus (EBV) genome. Here we present a 32-year-old-man with AIDS who developed three skin nodules on his lower left extremity. No other tumorous lesions were found using computed tomography scans. Two of the three nodules were resected for pathological examination. Histologically, both tumours were well circumscribed and located in the subcutis. The tumours were composed of interlacing fascicles of spindle-shaped cells with prominent vasculature and lymphocytic infiltration. No pleomorphism, mitosis or necrosis was seen. Immunohistochemically, the tumour cells were reactive to smooth muscle actin and desmin. Angioleiomyoma was diagnosed. EBV-encoded small RNAs were also demonstrated in the nucleus of the tumour cells by in situ hybridization but no EBV receptor (CD21) or latent membrane protein (LMP)-1 was found in the tumour cells. No human herpesvirus (HHV)-8 genome was detected in the lesion using polymerase chain reaction analysis. The results of this study indicated that EBV containing subcutaneous angioleiomyoma was another neoplasm that must be considered in patients with human immunodeficiency virus infection who develop skin nodules. The role of EBV in the pathogenesis of this unique neoplasm is still unknown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2133.2002.04818.x
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