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  • 1
    Electronic Resource
    Electronic Resource
    Fluids of hard-spheres with two sticky thin layers, liquid–liquid transition for pure substances (2001)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 115 (2001), S. 970-976 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The Ornstein–Zernike integral equation was solved with the Percus–Yevick approximation for systems containing hard spheres having two adhesive thin layers. One of them is on the surface as usual to account for the ordinary attraction between molecules. The other is located inside the hard core to mimic the collapse of structures under high pressures. Baxter's factorization method was used to obtain the equation of state analytically. Besides the ordinary gas–liquid transition, liquid–liquid transition was also found in the region where the reduced densities are higher than one. The latter repeats qualitatively the recently discovered phenomena of high-density liquid and low-density liquid transition of pure water. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1379574
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  • 2
    Electronic Resource
    Electronic Resource
    Density distribution for a polymer adsorbed at an oil–water interface (2002)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 117 (2002), S. 3935-3940 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The interaction between a polymer segment and an oil–water interface is represented by an asymmetric square-well potential where the well-depth on one side reflects water–polymer and the well depth on the other side reflects oil–polymer interactions. The polymer is represented by a Gaussian chain. The polymer's density distribution is calculated along a coordinate perpendicular to the interface. Results are obtained as a function of the well width, the well depth and its asymmetry and, most important, the polymer's length. For a symmetric well, the distribution shows a strong maximum at the interface provided that the polymer is sufficiently long. For an asymmetric well, the polymer is also strongly adsorbed at the interface provided that the polymer is sufficiently long and provided that the larger well-depth does not exceed a critical value that depends on the smaller well-depth. The calculations are in substantial agreement with experimental results that indicate nearly irreversible adsorption of long-chain molecules at an oil–water interface. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1494985
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  • 3
    Electronic Resource
    Electronic Resource
    Preparation Method and Cation Dopant Effects on the Particle Size and Properties of BaCeO3 Perovskites (2005)
    Oxford, UK : Blackwell Science Inc
    Journal of the American Ceramic Society 88 (2005), 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: Perovskite-type BaCeO3 has been investigated to study the effects of preparation method and cation doping on the particle size and sintering in the fabrication of dense perovskite membranes. A variety of preparation methods including solid-state reactions, coprecipitation, microemulsion, and molten salt reactions have been studied. In coprecipitation and microemulsion preparations, perovskites were formed at significantly lower temperatures than that required in a solid-state preparation. The pH of the reactant solutions has been found to greatly affect the particle size and agglomeration of BaCeO3 perovskites. Smallest perovskite particles with sizes of 40–60 nm were obtained by the microemulsion preparation with minimal agglomeration. Transition metal dopants such as neodymium and manganese cations were doped into BaCeO3 and their effects on the particle size and agglomeration of perovskite particles investigated. Both small particle size and cation doping significantly helped the sintering of perovskites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1551-2916.2005.00521.x
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  • 4
    Electronic Resource
    Electronic Resource
    Glamour and Value Strategies on the Tokyo Stock Exchange (1997)
    Oxford, UK and Boston, USA : Blackwell Publishers Ltd
    Journal of business finance & accounting 24 (1997), S. 0 
    Details
    ISSN: 1468-5957
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: This paper evaluates the performance of glamour and value strategies and tests the extrapolation model for the Japanese equity market. In general, value stocks outperform glamour stocks by between 6 and 12 percent per annum for the five years after portfolio formation. Evidence from past, future and expected growth provides strong support for the story developed in Lakonishok, Shleifer and Vishny (1994). It is difficult to attribute the value premia to the difference, if any, in risk factors. In addition, the book-to-market premium is much closer to an arbitrage opportunity than the size premium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1468-5957.00163
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  • 5
    Electronic Resource
    Electronic Resource
    Energy‐efficient selective cache invalidation (1999)
    Springer
    Wireless networks 5 (1999), S. 489-502 
    Details
    ISSN: 1572-8196
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Computer Science
    Notes: Abstract In a mobile environment, users of portable computers can query databases over the wireless communication channels. To reduce contention on the limited bandwidth of the wireless channels, frequently accessed data are cached at the mobile clients. However, maintenance of the cache consistency is complicated by the mobile clients' frequent disconnection to conserve energy. One promising approach in the literature is for the server to periodically broadcast invalidation reports from which clients can salvage their cache content that are still valid. This mechanism is, however, not energy efficient as clients are expected to examine the entire invalidation report. In this paper, we reexamine the cache coherency problem and propose three novel cache coherency schemes. While these schemes are based on periodic broadcast of invalidation reports, they allow clients to selectively tune to the portions of the invalidation report that are of interest to them. This allows the clients to minimize the power consumption when invalidating their cache content. We conducted extensive studies based on a simulation model. Our study shows that the proposed schemes are not only effective in salvaging the cache content that are still valid (and hence result in lower access time), but are also efficient in energy utilization. While none of the proposed algorithms is superior in both the access time and energy efficiency, one of the schemes, Selective Cache Invalidation, provides the best overall performance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019144304789
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  • 6
    Electronic Resource
    Electronic Resource
    Modeling generalized stacking faults in Au using the tight-binding potential combined with a simulated annealing method (2002)
    Springer
    The European physical journal 28 (2002), S. 45-48 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 61.72.Nn Stacking faults and other planar or extended defects – 71.15.Nc Total energy and cohesive energy calculations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The tight-binding potential combined with a simulated annealing method is used to study the generalized stacking fault (GSF) structure and corresponding energy of gold. The potential is chosen to fit band structures and total energies from a set of first-principle calculations [Phys. Rev. B 54, 4519 (1996)]. It is found that the relaxed stacking fault energy (SFE) and unstable SFE are equal to 46 and 102 mJ/m2, respectively, and are in good agreement with first principles calculations and experiment. In addition, the structure properties of the relaxed GSF of metal Au are also presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjb/e2002-00197-6
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  • 7
    Electronic Resource
    Electronic Resource
    Use of CO〈sub〉2〈/sub〉 as an Accelerated Curing Agent for Concrete Blocks (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 400-402 (Oct. 2008), p. 81-87 
    Details
    ISSN: 1013-9826
    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
    Notes: In this project, a process was developed to cure concrete masonry blocks using CO2. It was found that the strength of concrete mixtures for block manufacture after CO2 curing was close to that after conventional steam curing. A dry pre-conditioning before CO2 curing was very critical to achieve high degree of CO2 curing. The specimen pre-conditioned in the moist environment hydrates more than those pre-conditioned in the dry environment during the pre-conditioning period. However, much less CaCO3 formed in the former that that in the latter after the CO2 curing. Thus, the CO2 curing is mainly contributed by the reactions between CO2 gas and cement clink minerals
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/58/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.400-402.81.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    A Study on Machining Quality of a Kind of Functional Hollow Lightweight Metallic Micro-Helixes by Bio-Limited Forming (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 317-320 
    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
    Notes: Helical structure plays an important role in many fields and the machining quality isimportant for its applications. In this paper, a kind of functional hollow lightweight metallicmicro-helixes based on cells of spirulina was manufactured by bio-limited forming. Then theimpurity degree and the un-metallization degree, two important parameters to evaluate the machiningquality of the functional micro-helixes in the application to chiral microwave absorbing material wereinvestigated. Numeric models were established and the regularities were researched on how the twoparameters are influenced by metallization technology factors. The results showed that the values ofthese two parameters could be reduced by adjusting the volume of the original deposition solution for1g filtered wet activated cells, the diluted multiples of the original deposition solution, thetemperature of reaction and the time of reaction so as to improve the machining quality
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.317.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Pore Structure and Chloride Ion Transport Mechanisms in Concrete (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 302-303 (Jan. 2006), p. 528-535 
    Details
    ISSN: 1013-9826
    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
    Notes: Hardened cement paste and concrete are porous materials. Most engineering properties of hardened cement pastes and concrete, such as strength, shrinkage, permeability, etc., are influenced or controlled by their pore structure characteristics. The ingress of chloride ion into concrete can cause steel corrosion and damage of steel reinforced concrete structure. This paper reviews the porestructure characteristics and transport mechanisms of chloride ion, such as hydrostatic advection, capillary suction, diffusion, thermal migration and electrical migration, in hardened cement pastes and concrete
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.302-303.528.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Study on Improvement of Concrete Durability by Using High Performance Cement (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 302-303 (Jan. 2006), p. 204-210 
    Details
    ISSN: 1013-9826
    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
    Notes: Sulphate ion and chloride ion existed in the alkaline saline soils may cause seriousproblems on the durability of reinforced concrete structures, while it is found that superfine mineral powder plays positive role in the precaution of the alkaline saline corrosion. A composite cement named high performance cement (H.P.C) composed of clinker, metakaolin and fly ash powder in appropriate proportions is developed with good performance in preventing concrete from alkaline saline soil corrosion. Mortar bar test and visual examination showed that the cement couldeffectively control AAR and sulphate ion related expansion, and the charge passed tested according to ASTM C1202 was decreased to “negligible” level for concrete with W/B ratio of 0.3, and “very low” grade for concrete with W/B ratio of 0.45 and 0.55 when the high performance cement was used. Other properties such as low hydration heat and anti-freezing properties, as well as the uniformity of the fresh concrete (with no bleeding and segregation), made it an important material in the construction of concrete structure in alkaline saline soils
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.302-303.204.pdf
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