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  • 1
    Electronic Resource
    Electronic Resource
    Model for the vaporization of mixed organometallic compounds in the metalorganic chemical vapor deposition of high temperature superconducting films (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 1981-1983 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A model of the vaporization and mass transport of mixed organometallics from a single source for thin film metalorganic chemical vapor deposition is presented. A stoichiometric gas phase can be obtained from a mixture of the organometallics in the desired mole ratios, in spite of differences in the volatilities of the individual compounds. Proper film composition and growth rates are obtained by controlling the velocity of a carriage containing the organometallics through the heating zone of a vaporizer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.110621
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  • 2
    Electronic Resource
    Electronic Resource
    Emission probabilities of π electrons in carbon naonotubes (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 1999-2001 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The emission probability of π electrons at the local emission region containing a single carbon atom in capped C(5,5) single-walled carbon nanotubes is investigated from electronic and geometrical effects. Owing to electronic effects, the sequence of magnitude of emission probability of π electrons from various local emission regions at the tip is in descending order of T4 (the link region between the tip and the body), T2 and T3 (the middle regions), T1 (the top region), while that at the body is close to 0 due to geometrical effects. The fluctuation in the emission probabilities of π electrons implies that the total energy distribution of emitted electrons at the tip and the image luminescence from the tip are not uniform in essence. Different from electronic effects, geometrical effects are only crucial to the field emission property, and have less influence on the emission probability of π electrons for capped carbon nanotubes. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1461432
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  • 3
    Electronic Resource
    Electronic Resource
    Dimensional effects on field emission properties of the body for single-walled carbon nanotube (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 836-838 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In this letter, by use of the first-principles calculations, field emission properties of the body are investigated for a series of dimension-variational single-walled carbon nanotubes (SWNTs). We find that in the course of increasing tube diameter, at low emission currents, field emission properties worsen, chemical stability enhances and binding energy increases, which indicates that optimized field emitter could be achieved; while at high applied voltages, the highest emission current density may appear for the SWNT with some peculiar dimension. We predict that the body of the SWNT could behave as a peculiar field emitter with high threshold voltage and high current density. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1388871
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  • 4
    Electronic Resource
    Electronic Resource
    Qualitative and quantitative descriptions on the localized electronic structure in single-walled carbon nanotubes (2002)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 116 (2002), S. 2284-2288 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The localized electronic structure of single-walled carbon nanotubes (SWNTs) is qualitatively and quantitatively described by use of the first-principles calculations, and the localized molecular orbitals are distilled and the corresponding work functions are calculated within the framework of linear combination of atomic orbitals for molecular orbital. We find that the localized molecular orbital and localized work function are sensitive to the morphology of carbon nanotubes as like local density of states. With the localized electronic structures (i.e., localized work function, localized molecular orbital, and local density of states) of carbon nanotubes with various morphologies, we cannot only easily clarify the field emission characteristics of SWNTs, but also successfully interpret why open-ended SWNTs have higher chemical reactivity than capped ones. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1429242
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  • 5
    Electronic Resource
    Electronic Resource
    Synthesis and Characterization of n-HA/PVA/Gel Composite (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 330-332 (Feb. 2007), 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: A unique composite consisted of nano-hydroxyapatite (n-HA), poly (vinyl alcohol) (PVA)and gelatin (Gel), was prepared and characterized by Fourier transform infrared absorptionspectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and burningtest. The homogenicity of the composite was evaluated, and the presence of interior chemical bondwas confirmed and discussed. Mechanical strength and water absorption of the prepared compositewere investigated, respectively. The results show that n-HA/PVA/Gel composite has goodhomogeneity, similar mechanical properties to natural cartilage and excellent in vivobiocompatibility
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.330-332.471.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    The Influence of Preparation Condition on Nano-Hydroxyapatite Prepared in Different Solvent (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 544-545 (May 2007), p. 897-900 
    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/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.544-545.897.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Preparation of the Nano-Hydroxyapatite/Chitosan/Konjac GlucomannanComposite as a Novel Degradable Drug Delivery System (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 569 (Jan. 2008), p. 357-360 
    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: Nano-hydroxyapatite (n-HA)/chitosan (CS)/konjac glucomannan (KGM) composite wasprepared by integrating composition and molding. Then, X-ray diffraction (XRD) and scanningelectron microscopy (SEM) were used to analyze the physical, chemical and degradable propertiesof the composite before and after in simulated body fluid (SBF). Moreover, study in vitro test fordrug delivery revealed that the amount of released pentoxifylline(1-[5-oxohexyl]-3,7-dimethylxanthine)(PTX) reached a plateau and equaled 80% of the drug loadedin an implant. The newly develop n-HA/CS/KGM composite may serve as a good degradablebiomaterial for implantable drug delivery system (IDDS) in bone tissue engineering
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.569.357.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Preparation of Nano-Hydroxyapatite/Polyamide6 Composite Porous Scaffold for Bone Tissue Engineering (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 544-545 (May 2007), p. 793-796 
    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: Scaffold in bone tissue engineering must have a three-dimensional (3-D) interconnectedporous structure acting as a template for bone tissue regeneration, and material fabricating thescaffold must be biocompatible and can provide structural support during bone growth andremodeling at the same time. In this paper, a method of phase separation and particle leachingcombined (PS/PL) was used to prepare porous scaffold of nano-hydroxyapatite and polyamide6(n-HA/PA6) composite. The results show that the scaffold prepared by PS/PL has not onlyinterconnected macropores of 100~300 μm, but also micropores on the walls of macropores, andPS/PL scaffold is more interconnective in compare with phase separation (PS) scaffold. When theporosity of the scaffold is about 79%, its compressive strongth is about 3.27 MPa, that is similar tothe human cancellous bone(2~10MPa). Ethanol has some effect on hydrogen bonds, but fabricatingmethod will not change the chemical component of the composite. The porous scaffold is prospectfor bone tissue engineering
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.544-545.793.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Generating data integration mediators that use materialization (1996)
    Springer
    Journal of intelligent information systems 6 (1996), S. 199-221 
    Details
    ISSN: 1573-7675
    Keywords: materialized integrated view ; integration mediator ; activeness ; view decomposition plan
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract This paper presents a framework for data integration that is based on using “Squirrel integration mediators” that use materialization to support integrated views over multiple databases. These mediators generalize techniques from active databases to provide incremental propagation of updates to the materialized views. A framework based on “View Decomposition Plans” for optimizing the support of materialized integrated views is introduced. The paper describes the Squirrel mediator generator currently under development, which can generate the mediators based on high-level specifications. The integration of information by Squirrel mediators is expressed primarily through an extended version of a standard query language, that can refer to data from multiple information sources. In addition to materializing an integrated view of data, these mediators can monitor conditions that span multiple sources. The Squirrel framework also provides efficient support for the problem of “object matching”, that is, determining when object representations (e.g., OIDs) in different databases correspond to the same object-in-the-world, even if a universal key is not available. To establish a context for the research, the paper presents a taxonomy that surveys a broad variety of approaches to supporting and maintaining integrated views.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00122128
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  • 10
    Electronic Resource
    Electronic Resource
    Vaporization of a mixed precursor in chemical vapor deposition of YBCO films (1994)
    Springer
    Journal of superconductivity 7 (1994), S. 235-237 
    Details
    ISSN: 1572-9605
    Keywords: MOCVD ; YBCO thin films ; mixed precursor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Single-phase YBa2Cu3O7−δ thin films withT c values around 90 K are readily obtained by using a single-source chemical vapor deposition technique with normal precursor mass transport. The quality of the films is controlled by adjusting the carrier gas flow rate and the precursor feed rate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00730402
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