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  • 1
    Electronic Resource
    Electronic Resource
    3-D Sensing Using Laser Sheet Projection: Influence of Speckle (1995)
    Springer
    Optical review 2 (1995), S. 144-147 
    Details
    ISSN: 1349-9432
    Keywords: image speckle ; laser triangulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In laser triangulation, the determination of the centroid is limited by the image speckle. In this article we present a new method to reduce image speckle. We find the correlation function of image speckle decreases with the change of illumination angle, so for a static object we scan the incident angle within the plane of the light sheet and get a speckle-reduced image, with the time-integration effect of a CCD camera. An analytical description is presented and is experimentally verified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10043-995-0144-5
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  • 2
    Electronic Resource
    Electronic Resource
    Preparation and Electrochemical Characterization of Mn/Pb Composite Oxides for Supercapacitors (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 470-473 
    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: Mn/Pb composite oxides were prepared by solid-state reaction by KMnO4 with manganeseacetate and lead acetate at low temperature. The products were characterized by XRD and TEM. Theresults show that the composite oxides are nano-size and amorphous structure. Electrochemicalcharacterizations were performed by cyclic voltammetry (CV) and constant current charge-discharge in athree-electrode system. The potential windows of Mn/Pb composite oxides electrode are increased. Withincreasing the ratio of Pb, the specific capacitance goes through a maximum at 20% mol Pb. The specificcapacitance of pure MnO2 is 158 F/g and is improved to 180 F/g for the Mn0.8Pb0.2Ox composite oxide byconstant current discharge
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.470.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Hybrid Electro-Active Papers of Cellulose and Carbon Nanotubes for Bio-Mimetic Actuators (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 843-846 
    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: [removed info]Electro-Active Paper (EAPap) materials based on cellulose are attractive for manyapplications because of their low voltage operation, lightweight, dryness, low power consumption,bio-degradability. The construction of EAPap actuator has been achieved using the cellulose paperfilm coated with thin gold electrode layers. This actuator showed a reversible and reproduciblebending movement. In order to improve both force and displacement of this, efforts are made toconstruct hybrid EAPap actuators using cellulose paper coated with carbon nanotubes (CNT). Tocoat the CNT, single-walled carbon nanotubes (SWCNT) and multi-walled carbon nanotubes(MWCNT) are dispersed in polyaniline (PANI) matrix, and the solution is coated on the EAPap byusing a spin coater. It is expected that the use of CNT can improve the force output by enhancingthe stiffness of the hybrid EAPap actuator. Furthermore, the presence of the PANI may improve theactuation performance of the EAPap material. The performance of hybrid EAPap actuators is testedin an environmental chamber in terms of free displacement, blocked force and electrical powerconsumption. The performance of hybrid actuators is investigated for bio-mimetic applications
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.843.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Electrochemically Assisted Co-Precipitation of Electrically Conducting Polymer with Calcium Phosphate Coatings on Ti Alloys (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 1632-1634 
    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: Electrically conducting polymer containing calcium phosphate coating (ppy/brushite) wasmade on the Ti-6Al-4V surface by means of electrochemically assisted co-precipitation. This studyexamined the effects of the electrically conducting polymer on electrochemically assisted co-precipitationof ppy/ brushite onto titanium alloys. Electrochemically assisted co-precipitation of ppy/ brushite coatingsresulted in an increase in the thickness and adhesion of coatings compared to those of coatings of singlecalcium phosphate at the same deposition conditions. The surface morphology of coatings characterizedby SEM showed that the morphology of ppy/ brushite was superior to that of brushite. XRD indicated thatppy did not change the phase of brushite. Thus, this electrochemically assisted co-precipitation techniqueprovides an effective method of polypyrrole incorporation at physiological temperature, which can offerexcellent thickness, adhesion and structure of coatings, with a potential for sustained release oftherapeutic agents as required for metallic implant fixation
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1632.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Crystal Structure Controlled Synthesis of Titania Nanocrystals in Liquid Media at Low Temperature (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 11-12 (Feb. 2006), p. 3-6 
    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: High concentrated hydrochloric/nitric/sulfuric acid were used to dissolve Ti(OH)4produced with TiOSO4. It was found that, titania, from pure rutile phase to anatase-rutile mixedphase to pure anatase phase have been synthesized at low temperature in liquid media throughcontrolling the hydrolyzation conditions. The phase composition and the special surface area ofnanometer titania powder were characterized by means of XRD and BET. The K-edge fine structureof Ti atom sites of rutile TiO2 was investigated with grazing incidence reflection mode XAFS(EXAFS and XANES) spectroscopy. The well-crystal rutile TiO2 with fine particle size and highspecific surface (above200m2/g) was formed at low temperature below 80°C, while the anataseTiO2 was formed at higher temperature in hydrochloric or nitric acid solution. But in sulfuric acidsolution the crystal phase was always anatase at any temperatures. The EXAFS and XANES resultshowed that the order of the lattice, the coordination numbers of the Ti atom for the first shell, thesecond shell and the third shell as well as the relative intensity of K-preedge three peaks increasedwith the increase of the rutile TiO2 nanoparticle size
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.11-12.3.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Piezoelectric Effect of Electro-Active Paper Materials (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 326-328 (Dec. 2006), p. 1507-1510 
    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 application of electroactive polymer devices requires the availability of theirproperties at various operating conditions. This in turn necessitates a structure-property relationshipbased on an in-depth understanding of the underlying mechanism responsible for their strain-fieldresponse. Cellulose-based Electro-Active Paper (EAPap) has been studied as an attractive ElectroActive Polymer (EAP) material for artificial muscles. The feasibility of EAPap material as anactuator/sensor application is greatly dependant on piezoelectric effect. In this paper, converse anddi rect piezoelectric ef fect s of Electro-Active Paper materials are studied to characterizepiezoelectric effects of EAPap. All experiments were conducted in an environmental chamber thatcan control temperature and humidity
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.326-328.1507.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Formation and Control of Feed Direction Burrs in Machining (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 580-583 
    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: Based on the metal cutting experiments, the forming model of feed direction burr isproposed in the paper, a physical parameter of determining the generating of typeⅠ feed directionburr — critical tool edge angle rI χ is given. And the main factors which influence rI χ are studied bythe experiment, and related theory analysis is made. Furthermore, some new controlling methods andtechnology to restrain or decrease the feed direction burr in machining are developed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.580.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Study on Process of Magnesium Alloy Investment Casting (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 561-565 (Oct. 2007), p. 1019-1022 
    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: The process of different sorts of magnesium alloys investment casting is studied using amold materials composed of zircon and colloided silica binder. The investment shell is flushed outemploying protective gas mixture of 1% HFC134a and inert gas. The castings with perfect appearanceand high metallurgical quality are produced successfully for ZC62 and ME-1magnesium alloyrespectively. The mechanical properties of the castings reached the ASTM standard
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.1019.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    The Observation and Explanation of Electricity Switch Phenomena in PVT Grown SiC Bulk (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 600-603 (Sept. 2008), p. 43-46 
    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: An unusual contrast in SEM secondary electron imaging for PVT grown silicon carbide with vanadium doped was observed. An explanation in point of the compensation of different type of dopant was drawn. And the relationship between the doping properties of vanadium and orientation of SiC domains was investigated
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/20/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.600-603.43.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Influence of lower-valent A-site modifications on the structure-property relations of lead zirconate titanate (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 80 (1996), S. 5866-5874 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Studies of the structure-property relationships have been performed for lead zirconate titanate as a function of concentration of a lower-valent A-site substitution. Investigations focused on the system (Pb1−yKy)(Zr0.65Ti0.35)O3−y/2 for 0〈y〈0.20. These studies revealed modest changes in the dielectric response with increasing K1+ concentration. However, no evidence of relaxor ferroelectric characteristics was found. Transmission electron microscopy (TEM) studies were also performed. These investigations revealed strong changes in the ferroelectric domain structures with moderate increases in K1+ concentration. For K content (approximately-greater-than)4%, fine ferroelectric domains were found, which possessed a strong degree of wavy character. Increasing K1+ concentration resulted in further decreases in domain size. Sawyer–Tower polarization studies then demonstrated a strong reduction in the switchable polarization with increasing K1+ concentration, indicating that the polarization becomes pinned. Hot-stage TEM investigations were then performed. These studies revealed evidence for a pinning of the polarization into fine wavy domains at temperatures significantly below that of the ferroelectric transformation. These results are then compared to recent investigations of the influence of La3+ on the same base composition. We believe that the differences between lower- (K1+) and higher- (La3+) valent A-site modifications can be explained on the basis of the influence of quenched (which become mobile on heating in the ferroelectric phase) versus randomly quenched (above the ferroelectric transformation) defect complexes on the evolution of polar order. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.363580
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