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  • 1
    Electronic Resource
    Electronic Resource
    Matrix effect of bombardment-induced Gibbsian segregation on Cu depletion at a CuxNi100−xsubsurface (1995)
    Springer
    Applied physics 61 (1995), S. 419-423 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 79.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract.  A dynamic Monte-Carlo program, including an improved BIGS (Bombardment-Induced Gibbsian Segregation) model was employed to study the matrix effect of BIGS and its influence on Cu depletion at the subsurface under 1 keV Ar-ion bombardment of a Cu–Ni alloy. The calculation results show that not only at high fluences (the steady state) but also at low fluences, the Cu subsurface depletion depends on its bulk composition. This is because the atomic jump rate W 21 of Cu from the second layer to the first layer is correlated to Cu bulk composition at any fluence. We also found that the product of the non-segregating species concentration at the first layer with the segregating species concentration at the second layer plays a more important role than other parameters in determining W 21 under low current conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01540117
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  • 2
    Electronic Resource
    Electronic Resource
    Matrix effect of bombardment-induced Gibbsian segregation on Cu depletion at a Cu x Ni100−x subsurface (1995)
    Springer
    Applied physics 61 (1995), S. 419-423 
    Details
    ISSN: 1432-0630
    Keywords: 79.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A dynamic Monte-Carlo program, including an improved BIGS (Bombardment-Induced Gibbsian Segregation) model was employed to study the matrix effect of BIGS and its influence on Cu depletion at the subsurface under 1 keV Ar-ion bombardment of a Cu−Ni alloy. The calculation results show that not only at high fluences (the steady state) but also at low fluences, the Cu subsurface depletion depends on its bulk composition. This is because the atomic jump rateW 21 of Cu from the second layer to the first layer is correlated to Cu bulk composition at any fluence. We also found that the product of the non-segregating species concentration at the first layer with the segregating species concentration at the second layer plays a more important role than other parameters in determiningW 21 under low current conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01540117
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    On the Linear-Cost Subtree-Transfer Distance between Phylogenetic Trees (1999)
    Springer
    Algorithmica 25 (1999), S. 176-195 
    Details
    ISSN: 1432-0541
    Keywords: Key words. Evolutionary trees, Approximation algorithms, Lower bounds.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract. Different phylogenetic trees for the same group of species are often produced either by procedures that use diverse optimality criteria [16] or from different genes [12] in the study of molecular evolution. Comparing these trees to find their similarities and dissimilarities (i.e., distance ) is thus an important issue in computational molecular biology. Several distance metrics including the nearest neighbor interchange (nni) distance and the subtree-transfer distance have been proposed and extensively studied in the literature. This article considers a natural extension of the subtree-transfer distance, called the linear-cost subtree-transfer distance, and studies the complexity and efficient approximation algorithms for this distance as well as its relationship to the nni distance. The linear-cost subtree-transfer model seems more suitable than the (unit-cost) subtree-transfer model in some applications. The following is a list of our results: 1. The linear-cost subtree-transfer distance is in fact identical to the nni distance on unweighted phylogenies. 2. There is an algorithm to compute an optimal linear-cost subtree-transfer sequence between unweighted phylogenies in O(n ⋅ 2 O(d) ) time, where d denotes the linear-cost subtree-transfer distance. Such an algorithm is useful when d is small. 3. Computing the linear-cost subtree-transfer distance between two weighted phylogenetic trees is NP-hard, provided we allow multiple leaves of a tree to share the same label (i.e., the trees are not necessarily uniquely labeled). 4. There is an efficient approximation algorithm for computing the linear-cost subtree-transfer distance between weighted phylogenies with performance ratio 2 .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00008273
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  • 4
    Electronic Resource
    Electronic Resource
    No transneuronal degeneration between human cortical motor neurons and spinal motor neurons (1999)
    Springer
    Journal of neurology 246 (1999), S. 61-62 
    Details
    ISSN: 1432-1459
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004150050309
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  • 5
    Electronic Resource
    Electronic Resource
    Molecular-dynamics simulation of the Ag/Ni interface (1995)
    Springer
    Applied physics 61 (1995), S. 431-434 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 68.48; 61.50
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. The atomic structure in the interface region of a Ag/Ni bicrystal is simulated by molecular dynamics. The mechanical behavior of the interface under a tensile load along the interface is also calculated. The extension of a precrack near the interface is considered. Results show that the misfit dislocations are quite important in these respects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01540119
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  • 6
    Electronic Resource
    Electronic Resource
    Configurationally Frozen Defects, Random Strains and Landau Theory of Crystals to Glass Transition (1995)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 179-181 (Feb. 1995), p. 855-0 
    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
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/01/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.179-181.855.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Growth Mechanism of the (110) Face of Tetragonal Lysozyme Crystals (1997)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 53 (1997), S. 524-534 
    Details
    ISSN: 1399-0047
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The measured macroscopic growth rates of the (110) face of tetragonal lysozyme show an unexpectedly complex dependence on the supersaturation. In earlier studies it has been shown that an aggregate growth unit could account for experimental growth-rate trends. In particular molecular packing and interactions in the growth of the crystal were favored by completion of the helices along the 43 axes. In this study the molecular orientations of the possible growth units and the molecular growth mechanism were identified. This indicated that growth was a two-step process: aggregate growth units corresponding to the 43 helix are first formed in the bulk solution by stronger intermolecular bonds and then attached to the crystal face by weaker bonds. A more comprehensive analysis of the measured (110) growth rates was also undertaken. They were compared with the predicted growth rates from several dislocation and two-dimensional nucleation growth models, employing tetramer and octamer growth units in polydisperse solutions and monomer units in monodisperse solutions. The calculations consistently showed that the measured growth rates followed the expected model relations with octamer growth units, in agreement with the predictions from the molecular level analyses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0907444997003041
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  • 8
    Electronic Resource
    Electronic Resource
    Pecan Kernel Breakage and Oil Extracted by Supercritical CO2 as Affected by Moisture Content (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 64 (1999), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: During supercritical CO2 extraction of oil from pecans, kernel breakage frequently occurs when the depressurization time is short. The purpose of this study was to investigate the effects of initial moisture content of pecan kernels and moisture equilibration time on pecan breakage and oil recovery when extracting with supercritical CO2. Initial pecan moisture content, adjusted to 3.5% to 11.0%, had a significant effect on breakage when using a short depressurization time. With higher pecan moisture, less kernel breakage occurred. Increasing moisture equilibration time from 1 to 48 h reduced kernel breakage and produced an average of 30% more oil during extraction. Moisture content did not significantly affect the amount of oil extracted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1999.tb12287.x
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  • 9
    Electronic Resource
    Electronic Resource
    Improved laser-heated pedestal growth system for crystal growth in medium and high isostatic pressure environment (1999)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 70 (1999), S. 4606-4608 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A modified apparatus for single-crystal-fiber growth in an isostatic gaseous environment and for a large range of pressure (100 mbar up to 100 bar) using a floating-zone-type method known as laser-heated pedestal growth is described. The difficulties and advantages of its design are discussed through examples of crystal growth of some oxide materials. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1150120
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  • 10
    Electronic Resource
    Electronic Resource
    Vibrational Relaxation of the CO Stretch Vibration in Hemoglobin-CO, Myoglobin-CO, and Protoheme-CO (1995)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 99 (1995), S. 4842-4846 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100013a064
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