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  • Articles  (35)
  • Springer  (32)
  • Wiley  (3)
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  • Articles  (35)
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  • 1
    Electronic Resource
    Electronic Resource
    Parallel finite element method utilizing the mode splitting and sigma coordinate for shallow water flows (1999)
    Springer
    Computational mechanics 23 (1999), S. 144-150 
    Details
    ISSN: 1432-0924
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Parallel finite element method for the analysis of quasi-three dimensional shallow water flow is presented. The mode splitting technique and the sigma coordinate (generalized coordinate) are employed to use parallel computers effectively. Parallel implementation of the unstructured grid-based formulation is carried out on the Hitachi parallel-super computer SR2201. The tidal flow of Tokyo Bay is simulated for a numerical example. The speed-up ratio and the efficiency of the parallelization are investigated. The present method is shown to be a useful and powerful tool for the large scale computation of shallow water flows.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004660050394
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  • 2
    Electronic Resource
    Electronic Resource
    Reversible structural phase transition in Ni-Mn-Ga alloys in a magnetic field (2000)
    Springer
    JETP letters 72 (2000), S. 373-376 
    Details
    ISSN: 1090-6487
    Keywords: 64.70.Kb ; 75.30.Kz
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In Ni2+x Mn1−x Ga shape-memory ferromagnetic alloys with coincident magnetic and structural phase transitions, a reversible structural field-induced phase transition was observed at constant temperature and pressure in magnetic fields of about 10 T. Computational results are in qualitative agreement with experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1331149
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  • 3
    Electronic Resource
    Electronic Resource
    Ultrasonic speeds and densities of poly(dimethylsiloxane) (viscosity grades 30 and 50×10−4 m · s−1) at 298.15, 303.15, and 308.15 K under high pressures (1985)
    Springer
    International journal of thermophysics 6 (1985), S. 451-463 
    Details
    ISSN: 1572-9567
    Keywords: bellows piezometer ; density ; high pressure ; poly(dimethylsiloxane) ; sing-around technique ; ultrasonic speed
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The ultrasonic speeds and densities of poly(dimethylsiloxane), viscosity grades 30 and 50×10−4 m · s−1 at 298.15 K, were measured at 298.15, 303.15, and 308.15 K. The measurements were carried out using new apparatuses, one for measurement of the speed under pressures up to 200 MPa and another for measurement of the density under pressures up to 100 MPa. The former is constructed with a sing-around technique of the fixed-path type operated at a frequency of 2 MHz, and the latter is a dynamic bellows piezometer. The probable uncertainty in the present results is within ±0.23% for speed and ±0.19% for density for all the experimental conditions. The ultrasonic speed in these fluids at first increases rapidly with pressure and then indicates a mild rise in the highpressure region. Similar pressure effects are observed for the density. The relationship between the speed and the density satisfied a first-order function well. The isentropic compressibility, derived from the speed and density, also showed a large pressure effect. The values and its pressure effects seemed almost independent of the viscosity of poly(dimethylsiloxane).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00508890
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  • 4
    Electronic Resource
    Electronic Resource
    Ultrasonic speed in mixtures of monochlorodifluoromethane and monochloropentafluoroethane under high pressures (1989)
    Springer
    International journal of thermophysics 10 (1989), S. 661-671 
    Details
    ISSN: 1572-9567
    Keywords: binary mixture ; critical region ; high pressure ; R22 ; R502 ; R115 ; refrigerants ; ultrasonics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The ultrasonic speed u of [(1 -ϰ) CHClF2(1) + ϰC2ClF5(1)] including the azeotropic mixture [CHClF2(1) + C2ClF5(1)] was measured at pressures up to 51 MPa within the temperature range 283.15 to 373.15 K, using a sing-around technique operated at a frequency of 2 MHz with an estimated uncertainty of less that ±2.4 m·s−1. For ϰ = 0.1537 and 0.6268, measurements of the vapor pressure are also reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00507987
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  • 5
    Electronic Resource
    Electronic Resource
    Densities of tetramethylsilane, tetraethylsilane, and tetraethoxysilane under high pressures (1990)
    Springer
    International journal of thermophysics 11 (1990), S. 477-486 
    Details
    ISSN: 1572-9567
    Keywords: density ; equation of state ; high pressure ; Tait equation ; tetraethylsilane ; tetraethoxysilane ; tetramethylsilane
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Accurate density data for tetramethylsilane, tetraethylsilane, and tetraethoxysilane in the temperature range from 283.15 to 333.15 K under pressure up to 100 MPa have been measured in order to test existing correlation methods. We have also measured the saturated liquid densities of tetramethylsilane, tetraethylsilane, and tetraethoxysilane in the temperature range from 283 to 343 K. The modified Rackett equation and the COSTAD correlation were used to correlate the saturated liquid density data. The Tait equation and a modified van der Waals equation of state were used to correlate the liquid density data under pressure. It was found that the average absolute deviations of the experimental values from those calculated with the Tait equation and the modified van der Waals equation of state were less than 0.01 and 0.21%, respectively. The effective hard sphere diameters for these three silane compounds were determined from the modified van der Waals equation of state parameter. It was found that the effective hard-sphere diameter decreases with temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00500840
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  • 6
    Electronic Resource
    Electronic Resource
    In vitro mineralization in bovine tooth germ cell cultured with sintered hydroxyapatite (1993)
    Springer
    Journal of materials science 4 (1993), S. 569-574 
    Details
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Unerupted teeth were extracted from the mandibles of calves, and the enamel surfaces containing ameloblasts and cells of papilla layer were scraped off. Cells migrated from the fragments were transferred into culture flasks containing small bars of sintered hydroxyapatite, and the cultures were incubated long-term. Most of the cells showed a fibroblastic morphology, but some of the cells formed an epithelial cell nest. The fibroblastic cells grew steadily, but the epithelial cells showed poor growth. The fibroblastic cells formed multiple cell layers and were embedded in collagenous matrix containing type I trimer collagen. By 3 months, fibrous bands appeared on the surface of the cell layers and surrounded the bars of sintered hydroxyapatite. Such bands increased in size with incubation time. Mineral deposition was observed in the well-developed bands. The deposited crystals were found by the X-ray powder diffraction method to be hydroxyapatite; the Ca/P molar ratio of 1.49 was determined by the ICP method. These results indicated that cells of papilla layer have the capacity to mineralize in vitro in the presence of sintered hydroxyapatite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00125595
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  • 7
    Electronic Resource
    Electronic Resource
    Effectiveness of a dispersant for the thickening of alumina slurries whilst retaining the fluidity (1993)
    Springer
    Journal of materials science 28 (1993), S. 4456-4460 
    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 Concentrated alumina slurries were fluidized in an optimum amount of polyacrylates (PAA) in the content region where a good dispersion was obtained. Dispersion was necessary, but not sufficient for fluidization. The expected role of PAA in the thickening was retention of a water-reducing ability to retain the fluidity. Thickening of the alumina slurry to the limit of retaining the fluidity was achieved by the amount of PAA at which the flow point showed a minimum. The flow of alumina slurries around the limit was approximated by the Bingham model which was characterized by the yield stress and the Bingham viscosity. The flow curves of the slurries containing insufficient PAA had a yield stress which decreased with increasing amount of PAA and disappeared at an optimum amount of PAA to give a minimum flow point. The yield stress again increased retaining the low Bingham viscosity with increasing amount of PAA, to exceed the optimum amount for molecular weights smaller than 10 000. On the other hand, the Bingham viscosity increased without increasing the yield stress with increasing amount of PAA, to exceed the optimum amount for molecular weights larger than 20 000. The effect of PAA on the dispersion and flow behaviour could be explained by the electrostatic stabilization based on the Derjaguin-Landau, Verwey-Overbeek (DLVO) theory for the PAA with a molecular weight smaller than 10 000, and by the steric stabilization for the PAA with a molecular weight larger than 20 000.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01154956
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  • 8
    Electronic Resource
    Electronic Resource
    Formation of protein- and peptidemembrane assemblies and membrane fusion (1997)
    Springer
    Colloid & polymer science 106 (1997), S. 219-222 
    Details
    ISSN: 1435-1536
    Keywords: Amphipathic peptide ; clathrin ; liposome ; membrane ; fusion ; fusion mechanism
    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 Membrane fusion reactions consist of three steps: close apposition of membranes, mixing of lipid molecules, and formation of new bilayers in a different direction. For elucidation of the molecular mechanisms of these three steps, we have studied membrane fusion induced by amphipathic helical peptides and the protein clathrin using liposome membrane systems. Based on the results, we propose two different mechanisms of membrane close apposition: close apposition of negatively or positively charged membranes occurs through the hydrophobic interaction between proteins or peptides after their electrostatic binding to the membranes, whereas close apposition of neutral membranes occurs through the membrane binding and self-aggregative properties of proteins or peptides that are provided by neutralization of their surface charges. We also propose a possible mechanism for the lipid-mixing reaction to form new bilayers, which is interpreted in terms of destabilization of the bilayer structure within hydrophobic protein- or peptide-membrane assemblies and stabilization of the bilayer structure in their hydrophilic media.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01189524
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  • 9
    Electronic Resource
    Electronic Resource
    A fluorometric sensitivity test for chloroquine in Plasmodium falciparum isolates from patients (1987)
    Springer
    Parasitology research 73 (1987), S. 303-305 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A new technique for assessment of in vitro growth of Plasmodium falciparum by fluoroassay was used to determine the sensitivity to chloroquine of parasites from cases of malaria imported into Japan. The technique was reliable, giving comparable results to the Rieckmann test, and is also applicable in the field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00531082
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  • 10
    Electronic Resource
    Electronic Resource
    Acquirement of protective immunity in mice through infection with an attenuated isolate and its failure in parent virulentPlasmodium berghei (1989)
    Springer
    Parasitology research 75 (1989), S. 614-618 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract In virulentPlasmodium berghei infection, mice showed suppressive responses to sheep red blood cells SRBC (PFC) as well as the parasite antigen (DTH) and developed autoantibodies against homologous lymphocytes. On the other hand, mice infected with an attenuated variant derived fromP. berghei did not show these responses but developed solid protective immunity against parent parasite infection accompanied by high antibody titre. When such an immune serum was transferred into mice, attenuated parasite infection was completely eliminated. These results show that an attenuated variant stimulates antibody production, which contributes to protection against the parasites. In contrast, in virulentP. berghei infections harmful immunopathological responses against the host are more prominent than protective immune responses against the parasites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00930958
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