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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis of Phase Controlled TiO〈sub〉2〈/sub〉 Nanocrystals (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 121-123 (Mar. 2007), p. 1273-1276 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: Synthesis of TiO2 nanocrystals directly from the TiO2 micron powders by thehydrothermal method is reported for the first time. A new route of preparing amorphous TiO2nanopowders is demonstrated in this paper. The TiO2 nanocrystals phase structure can be controlledby the subsequent treatment with different concentration HCl solutions. When the amorphous TiO2nanopowders are treated with 0.2M HCl aqueous solution, a spherical anatase phase nanorystals areobtained, while treated with 1.0M HCl aqueous solution, a rod-like rutile phase nanocrystals areformed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.121-123.1273.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    How to unconfound the directional and orientational information in visual neuron's response (1990)
    Springer
    Biological cybernetics 63 (1990), S. 135-142 
    Details
    ISSN: 1432-0770
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Computer Science , Physics
    Notes: Abstract When drifting bars or gratings are used as visual stimuli, information about orientation specificity (which has a period of 180°) and direction specificity (which has a period of 360°) is inherently confounded in the response of visual cortical neurons, which have long been known to be selective for both the orientation of the stimulus and the direction of its movement. It is essential to “unconfound” or separate these two components of the response as they may respectively contribute to form and motion perception, two of the main streams of information processing in the mammalian brain. Wörgötter and Eysel (1987) recently proposed the Fourier transform technique as a method of unconfounding the two components, but their analysis was incomplete. Here we formally develop the mathematical tools for this method to calculate the peak angles, bandwidths, and relative strengths, the three most important elements of a tuning curve, of both the orientational and the directional components, based on the experimentally-recorded neuron's response polar-plot. It will be shown that, in the 1-D Fourier decomposition of the polar-plot along its angular dimension, (1) the odd harmonics contain only the directional component, while the even harmonics are contributed to by both the orientational and the directional components; (2) the phases and the amplitudes of all the harmonics are related, respectively, to the peak angle and the bandwidth of the individual component. The basic assumption used here is that the two components are linearly additive; this in turn is immediately testable by the method itself.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00203036
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  • 3
    Electronic Resource
    Electronic Resource
    3D Anisotropic Elastoplastic-Damage Model and its Application in Simulating the Behavior of Rock Materials (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 579-582 
    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: A 3D anisotropic elastoplastic-damage model was presented based on continuum damagemechanics theory. In this model, the tensor decomposition technique is employed. Combined with theplastic yield rule and damage evolution, the stress tensor in incremental format is obtained. Thederivate eigenmodes in the proposed model are assumed to be related with the uniaxial behavior ofthe rock material. Each eigenmode has a corresponding damage variable due to the fact that damage isa function of the magnitude of the eigenstrain. Within an eigenmodes, different damage evolution canbe used for tensile and compressive loadings. This model was also developed into finite element codein explicit format, and the code was integrated into the well-known computational environmentABAQUS using the ABAQUS/Explicit Solver. Numerical simulation of an uniaxial compressive testfor a rock sample is used to examine the performance of the proposed model, and the progressivefailure process of the rock sample is unveiled
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.579.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Fabrication of Heater Element in Release System (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 769-771 
    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
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.769.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Numerical Calculation of Peeling Strength in Anisotropic Conducive Adhesive Bonding (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 471-474 
    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: The cohesive zone interface model was used to calculate 90o peel in the ACF bondingsamples. The constitutive equation for the interface model was modified by introduction a damagefactor χ . The thermal damage factor and humidity damage factor can be derived from theexperiment data. The interfacial model with damage factor can change the maximal peel stress andthe delamination length. The calculation result of the interfacial model with damage factor agreedwell to the experiment of the 90o peeling
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.471.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Preparation and Characterization of ZnO Thin Film Doped with Eu via Sol-Gel Method (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 585-588 
    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: ZnO:Eu3+ films were obtained by dip-coating method and influence of heat treatment onluminescent properties was investigated. Emission and excitation spectra revealed that the organic andnitrate molecules, which adhered on the surface of films when the samples were treated at lowertemperatures (300oC-400oC), played an important role on the luminescent properties. At highertemperatures (500oC-800oC), the luminescence spectra of ZnO and Eu3+ were quite different with thosetreated at lower temperatures. Energy transferred from ZnO host to Eu3+ was obviously observed in theemission and excitation spectra. The luminescence mechanism was discussed briefly
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.585.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesis and Characterization of Y〈sub〉2〈/sub〉O〈sub〉3〈/sub〉:Eu〈sup〉3+〈/sup〉 Film Derived by Sol-Gel Processing (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 593-596 
    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: Y2O3:Eu3+ thin film was synthesized by sol-gel method with inorganic salt raw materials, andthe crystal structure and luminescent properties were investigated. By adding organic additive to the sol, ahomogeneous film with high luminescent intensity could be obtained by dip-coating technique on thesurface of alumina sheet and quartz glass. Structures of the films were studied by XRD and SEM. Theexcitation spectra of the films showed a wide excitation peak from 200nm to 260nm, and the emissionspectra had a strongest emission peak at 611nm which revealed a close relationship with the calciningtemperature
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.593.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Large-Scale Fabrication of ZnO Hexagonal Rods Arrays by a Simple Chemical Solution Method (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 2169-2172 
    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 paper, nanostructure zinc oxide (ZnO) hexagonal rods arrays on ZnO granular filmscoated substrates were fabricated by a simple chemical solution method. The shapes and structures can becontrolled by changing the reactants and experimental conditions. X-ray diffraction (XRD),field-emission scanning electron microscopy (FESEM) equipped with energy dispersive spectrometer(EDS), and fluorescence spectrum were used to characterize the structures and luminescent properties.The best reacting condition has been discussed. Urea was found playing an important role in forming rods.The granular films acting as the seed films were proved
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.2169.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Environmentally Benign Adhesive Synthesized by Dispersion Copolymerization of Styrene and Butyl Acrylate (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 11-12 (Feb. 2006), p. 757-760 
    Details
    ISSN: 1662-8985
    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: Environmentally benign adhesive was synthesized by dispersion copolymerization ofstyrene(St) and butyl acrylate (BA) in an ethanol medium with benzoyl peroxide (BPO) as the initiatorand poly(vinylpyrrolidone) as the stabilizer in the presence of acrylic acid(AA) as the functionalmonomer. The effect of the concentration of stabilizer, initiator and functional monomer on theconversions, molecular weights and molecular weight distributions was investigated. The resultsshow that the conversions almost keep invariable with the increasing of stabilizer concentration, butthe molecular weights increase and molecular weight distributions decrease. Conversions increasewith the increasing of initiator concentration, but the molecular weights and molecular weightdistributions decrease. However with the increasing of functional monomer concentration,conversions and molecular weight distributions increase but the molecular weights decrease
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.11-12.757.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Growth Characteristic and Fracture Toughness of Laser Rapidly Solidified Al〈sub〉2〈/sub〉O〈sub〉3〈/sub〉/YAG/ZrO〈sub〉2〈/sub〉 Ceramic Eutectic 〈i〉In Situ〈i〉 Composite (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 33-37 (Mar. 2008), p. 495-500 
    Details
    ISSN: 1662-8985
    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: Directionally solidified oxide ceramic eutectic composites with superior strength,oxidation resistance, creep resistance, structural stability and low sensitivity to crack at hightemperature have aroused much attention in recent years, and various preparation techniques havebeen developed. In situ fabrication of ceramic eutectic composites by laser rapid solidification is acheap and quick method compared to conventional multi-step fabrication methods of fiber reinforcedcomposites for high temperature use. In this paper, Al2O3/YAG/ZrO2 ternary eutectics are rapidlyprepared from melt by directional solidification using laser zone remelting technique, the growthcharacteristic and fracture toughness are investigated. The results show that: (1) Laser rapidlysolidified Al2O3/YAG/ZrO2 ceramic eutectic in situ composite presents a fine interpenetratingnetwork structure, in which Al2O3, YAG and ZrO2 phases are continually interconnected and finelycoupled without pores, colonies and grain boundaries between interfaces. (2) Laser scanning rate andpower density strongly affect the eutectic growth. With the processing parameters adjusted properly,the eutectic shows homogeneous and coupled lamellar microstructure. The characteristic dimensionsof the microstructure are around 2~3 1m for Al2O3 and YAG phases, and around 0.2~1 1m for ZrO2phases, respectively. (3) The hardness and fracture toughness of the rapidly solidifiedAl2O3/YAG/ZrO2 eutectic are 16.7 GPa and 8.0 MPa.m1/2, respectively
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.33-37.495.pdf
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