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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
    Study of the transesterification of a main-chain mesomorphic polyester by small-angle neutron scattering (1993)
    s.l. : American Chemical Society
    Macromolecules 26 (1993), S. 119-124 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00053a019
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  • 4
    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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  • 5
    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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  • 6
    Electronic Resource
    Electronic Resource
    Effect of Dicyclohexylcarbodiimide (DCCD) on Transport Parameters in the Frog Cornea Epithelium (2000)
    Springer
    The journal of membrane biology 174 (2000), S. 97-103 
    Details
    ISSN: 1432-1424
    Keywords: Key words: Dicyclohexylcarbodiimide — Frog cornea (R. catesbeiana) — Na+/K+-ATPase — K+ conductance — Short-circuit current — Microelectrode technique
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract. Dicyclohexylcarbodiimide (DCCD) is a carboxyl group modifier and it is an inhibitor of various ATPases. Present experiments, using an in vitro preparation, were designed to study whether DCCD affected the transporters of the bullfrog cornea epithelium, specifically, the Na+/K+ ATPase pump located in the basolateral membrane. For this purpose, corneas were impaled with microelectrodes and experiments were done under short-circuit current (I sc ) conditions. Addition of DCCD to a concentration of 10−4 m to the tear solution gave a marked decrease in I sc ; a marked depolarization of the intracellular potential, V o ; and a significant decrease in the apical membrane fractional resistance, fR o . There were small and variable although significant changes in the transepithelial conductance, g t . The effects may be explained by a decrease in the basolateral membrane K+ conductance, in combination with a partial inhibition of the Na+/K+-ATPase pump located in the basolateral membrane. There is also evidence for an increase in the apical membrane Cl− conductance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002320001035
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  • 7
    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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  • 8
    Electronic Resource
    Electronic Resource
    Phase studies and thermal stability of binary systems of cholesteric liquid crystals (2000)
    Springer
    Applied physics 70 (2000), S. 663-668 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 30; 40; 60
    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 binary mixture of cholesteryl oleyl carbonate (COC) and cholesteryl nonanoate (CN) with different ratios has been characterized by differential scanning calorimetry (DSC) to determine the phase diagrams. Their normal shelf-life and accelerated stability studies were also examined. A novel microscopic Fourier-transform infrared (FT-IR) spectrometer equipped with DSC was also used to measure simultaneously the chemical structural variation and the thermal response of these liquid crystals. The results indicate that the binary mixture might transform from smectic to cholesteric and then to isotropic liquid (CN composition 〈50%); from solid to cholesteric and then to isotropic liquid (CN composition 〉50%). Therefore, the 50% CN composition might play a critical role in the phase transition of the binary COC-CN mixture. The microscopic FT-IR/DSCsystem could also confirm the phase transition, but could measure the phase trasition temperature of liquid crystals more easily and sharply than the DSC method. The long-term accelerated thermal stability of the COC-CN mixture seemed to be more constant when stored at 4 °C than in any other temperature conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390050011
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  • 9
    Electronic Resource
    Electronic Resource
    Second Generation High-k Gate Insulators (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advances in science and technology Vol. 45 (Oct. 2006), p. 1342-1350 
    Details
    ISSN: 1662-0356
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Natural Sciences in General , Technology
    Notes: Very high (k〉25) permittivity materials have been investigated as a second step high-kgate insulator. These are all formed by adding other materials to the basic HfO2. Hafnium titanatethin films were deposited by chemical vapor deposition (CVD). It was observed that both theinterfacial layer (IL) EOT and the permittivity increase with Ti content and that films with higher Ticontent are also more immune to crystallization. Permittivities as high as 50 were achieved. In theMOSFET devices with the hafnium titanate films, normal transistor characteristics were observed,including electron mobility degradation. In SrHfO3 films, deposited by physical vapor deposition(PVD), a permittivity as high as 35 was achieved. These films appear to be highly stable upon hightemperature annealing, but show a thick, anomalous interfacial layer
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.45.1342.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Optical Interband Transitions in Single and Periodically Delta-Doped GaAs Samples (1991)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 65-66 (Jan. 1991), p. 67-72 
    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/2011/0528/02/20/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.65-66.67.pdf
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