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  • 2005-2009  (45)
  • 2000-2004  (22)
  • 1990-1994  (12)
  • 1
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    The relative amplitudes of mantle heterogeneity in P velocity, S velocity and density from free-oscillation data (1991)
    In:  Geophys. J. Int., Amsterdam, 4, vol. 105, no. 1-2, pp. 649-657, pp. 1334, (ISSN: 1340-4202)
    Details
    Publication Date: 1991
    Keywords: Velocity analysis ; Amplitude ; earth mantle ; Inhomogeneity ; Body waves ; P-waves ; Shear waves ; (The Earth's free) oscillations ; GJI
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Inversion of the strain accumulation state in crustal interior from observations of earth tide tilts (1992)
    Il Cigno Galileo Galilei
    In:  Professional Paper, Open-File Rept., Earthquake Prediction, Roma, Il Cigno Galileo Galilei, vol. 1, no. 2, pp. 317-332, (ISBN 0080419208)
    Details
    Publication Date: 1992
    Keywords: Earthquake precursor: prediction research ; Earthquake precursor: deformation or strain ; Earth tides ; Earthquake precursor: tilt ; JZSCHAU
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Quantitative 3D video microscopy of HIV transfer across T cell virological synapses (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-03-28
    Description: The spread of HIV between immune cells is greatly enhanced by cell-cell adhesions called virological synapses, although the underlying mechanisms have been unclear. With use of an infectious, fluorescent clone of HIV, we tracked the movement of Gag in live CD4 T cells and captured the direct translocation of HIV across the virological synapse. Quantitative, high-speed three-dimensional (3D) video microscopy revealed the rapid formation of micrometer-sized "buttons" containing oligomerized viral Gag protein. Electron microscopy showed that these buttons were packed with budding viral crescents. Viral transfer events were observed to form virus-laden internal compartments within target cells. Continuous time-lapse monitoring showed preferential infection through synapses. Thus, HIV dissemination may be enhanced by virological synapse-mediated cell adhesion coupled to viral endocytosis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2756521/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2756521/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hubner, Wolfgang -- McNerney, Gregory P -- Chen, Ping -- Dale, Benjamin M -- Gordon, Ronald E -- Chuang, Frank Y S -- Li, Xiao-Dong -- Asmuth, David M -- Huser, Thomas -- Chen, Benjamin K -- 5R24 CA095823-04/CA/NCI NIH HHS/ -- AI074420-02/AI/NIAID NIH HHS/ -- DP1 DA028866/DA/NIDA NIH HHS/ -- R01 AI074420/AI/NIAID NIH HHS/ -- R01 AI074420-01A2/AI/NIAID NIH HHS/ -- R01 AI074420-02/AI/NIAID NIH HHS/ -- S10RR09145-01/RR/NCRR NIH HHS/ -- ULRR024146/PHS HHS/ -- New York, N.Y. -- Science. 2009 Mar 27;323(5922):1743-7. doi: 10.1126/science.1167525.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Infectious Diseases, Department of Medicine, Immunology Institute, Mount Sinai School of Medicine, New York, NY 10029, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19325119" target="_blank"〉PubMed〈/a〉
    Keywords: CD4-Positive T-Lymphocytes/*physiology/ultrastructure/*virology ; *Cell Adhesion ; Coculture Techniques ; Cytochalasin D/pharmacology ; Endocytosis ; HIV/*physiology/ultrastructure ; Humans ; Imaging, Three-Dimensional ; Jurkat Cells ; Microscopy, Confocal ; Microscopy, Electron, Transmission ; Microscopy, Video ; Receptors, CCR5/metabolism ; Receptors, CXCR4/metabolism ; Recombinant Fusion Proteins/metabolism ; *Virus Internalization ; gag Gene Products, Human Immunodeficiency Virus/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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    PAPER CURRENT
  • 4
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    Comparison of Elemental Composition and Solubility in the Zinc Hyperaccumulator Thlaspi caerulescens with the Non-Hyperaccumulator Thlaspi ochroleucum (2000)
    Springer
    Details
    Publication Date: 2000-09-01
    Print ISSN: 0007-4861
    Electronic ISSN: 1432-0800
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Published by Springer
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    PAPER CURRENT
  • 5
    Electronic Resource
    Electronic Resource
    The relative amplitudes of mantle heterogeneity in P velocity, S velocity and density from free-oscillation data (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 105 (1991), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Splitting functions retrieved from spectra of the free oscillations are sensitive to the lateral variations in P velocity (α), S velocity (β), and density (ρ) simultaneously. In this study they are used to constrain the values of the ratios d ln α/d ln β and d ln ρ/d ln α for the lower mantle. Assuming that the upper mantle structure is obtainable from model M84A (this is not a crucial assumption as experiments indicate), the optimal value of d ln α/d ln β inferred from the modal data is 0.44 and d ln α/d ln β lies in the interval (0.39, 0.60) with 75 per cent confidence, strongly discriminating against the value (0.8) often used. The constraints on density structure of the current data are insufficient to yield new definitive results. The analysis demonstrates, however, that the value of d ln ρ/d ln α could be estimated from a larger set of modal data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1991.tb00802.x
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    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Comparison of Elemental Composition and Solubility in the Zinc Hyperaccumulator Thlaspi caerulescens with the Non-Hyperaccumulator Thlaspi ochroleucum (2000)
    Springer
    Bulletin of environmental contamination and toxicology 65 (2000), S. 343-350 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s0012800134
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  • 7
    Electronic Resource
    Electronic Resource
    Geographical variations of trace elements in sediments of the major rivers in eastern China (2000)
    Springer
    Environmental geology 39 (2000), S. 1334-1340 
    Details
    ISSN: 1432-0495
    Keywords: Keywords China ; Geochemistry ; River ; Sediment ; Trace metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  A total of 26 geographically and hydrologically diverse sediment samples were collected from 12 major rivers in eastern China. The 〈63-μm fraction of the sediments was analysed for both total concentrations of Cu, Zn, Pb and Cd, and their associations with various geochemical phases. The geographical variations of sediment-bound trace metals can be related to the bedrock types and weathering processes in the corresponding river basins. The rivers in southern China had notably higher concentrations of trace metals in sediments because of abundant non-ferrous mineral deposits and stronger weathering process in the region. A large proportion of trace metals in these sediments was associated with iron and manganese oxides and organic matter. Relative low levels of trace metals were found in river sediments in northern China, and a significant proportion of the metals was bound to organic matter, carbonates, and the residual fraction. The sediments in the Yellow River, originating from special loess, had the lowest concentrations of trace metals. Most of the trace metals were associated with the carbonates and residual phases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002540000224
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  • 8
    Electronic Resource
    Electronic Resource
    Mössbauer study of the early stages of ageing in an Fe-19Co-14Mo-10Ni maraging steel (1993)
    Springer
    Journal of materials science 12 (1993), S. 179-181 
    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/BF00819952
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  • 9
    Electronic Resource
    Electronic Resource
    A simple local error estimator and an adaptive time-stepping procedure for direct integration method in dynamic analysis (1993)
    Chichester : Wiley-Blackwell
    Communications in Numerical Methods in Engineering 9 (1993), S. 273-292 
    Details
    ISSN: 1069-8299
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A simple a posteriori local error estimator for time discretization in structural dynamic analysis is presented. It is derived from the difference of the solutions between an ordinary integration method (the Newmark scheme) and another higher-order one which assumes that the derivatives of accelerations vary linearly within each time step. It may be obtained directly without resolving new equations, so the additional computational cost is small and the implementation is convenient. Furthermore, it is shown that this error estimator may also be obtained by Taylor expansion or by a post-processing technique. Accordingly, an adaptive time-stepping procedure, which automatically adjusts the time-step size so that the local error at each time step is within a prescribed accuracy, is described. Numerical examples, including two single-DOF problems, a two-DOF problem and a multi-DOF model, are presented. The results show that the presented local error estimator is simple, reliable and accurate.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cnm.1640090402
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  • 10
    Electronic Resource
    Electronic Resource
    Superconvergent patch recovery of finite-element solution and a posteriori L2 norm error estimate (1994)
    Chichester : Wiley-Blackwell
    Communications in Numerical Methods in Engineering 10 (1994), S. 313-320 
    Details
    ISSN: 1069-8299
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: In the paper we present a superconvergent patch recovery technique for obtaining higher-order-accurate finite-element solutions and thus a postprocessed type of L2 norm error estimate. Two modifications make our procedure different from the one proposed by Zienkiewicz and Zhu (1992), in which higher-order-accurate derivatives of the finite-element solution at nodes are determined. Firstly, the recovery process is made for element, not for nodes. An ‘element patch’, which represents the union of an element under consideration and the surrounding elements, is introduced. Secondly, the local error estimate is calculated directly from the improved solution for this element. Numerical tests on both 1D and 2D model problems show that this method can provide an asymptotically exact a posteriori L2 norm error estimate if the used element possesses superconvergent points for the solutions.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cnm.1640100406
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