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  • 1
    Electronic Resource
    Electronic Resource
    Improvement in the Sensitivity of the Response of Diamond Thin Films to X-Ray (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 1718-1721 
    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: Due to some inferior performance of Chemical Vapor Deposition (CVD) diamond dosimeters,their applications are somewhat limited. The quality of diamond films was improved using MicrowavePlasma CVD (MWPCVD) by the modified processes such as cyclic deposition and in-situ plasmapost-treatment. The simple radiation dosimeters were fabricated in a sandwich configuration. Influence ofpurity and orientation of the diamond films on the sensitivity of the dosimeters was studied. The resultsindicate that the radiation dosimeters have high sensitivity to X-ray and the response of the devices islinear with the X-ray flux. The higher the purity of films is, the higher the resistivity and sensitivity are.The dosimeter based on [100] film has higher sensitivity than that based on [111] film. The dosimeterbased on films prepared by cyclic deposition has higher sensitivity than that based on films prepared bythe conventional deposition. The characterization of the response to X-ray also shows that in-situ oxygenplasma post-treatment leads to the higher sensitivity of dosimeters compared with in-situ nitrogen,hydrogen plasma post-treatments
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1718.pdf
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Assessment of the Surface Morphology of Diamond Film Based on Fractal (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 2543-2545 
    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 surface morphology of film material directly affects its physical performance. It is of greatsignificance for finding out its prospective physical performance to characterize the surface morphologyof film material. It is hard to characterize them with some conventional methods. The surface morphologyof film material was described from the fractal point of view, and the dimension was correlated with theresistivity of material. The [100]-orientated diamond film was primarily investigated. The results showthat the greater the crystal grain is, the more uniform and regular the orientation is; and the more compactthe arrangement is, the greater the fractal box dimension is. Moreover, when fractal box dimensions werewithin a certain range approximately from 2.92 to 2.97, it presents positively correlative relation with thelogarithm of resistivity, Log(ρ), which resembles the Logistic curve. However, when the other dimensionsare beyond the range mentioned above, resistivity doesn’t change with the increase in dimensions offractal. This study will conduce to illustrating the relationship between the structure of crystal exemplifiedby arrangement and physical performance as well as material preparation
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.2543.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Quantitative Evaluation for New Bone Growth of Bone Repairing Biomaterial Based on Color Image Segmentation (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 2493-2496 
    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: Quantitative evaluation of repairing effect of bone grafting material is one of the essentialstudying subjects. However, traditional evaluation methods are subjective and qualitative. In this paper,the region of new bone from a bone repairing biomaterial planted image is extracted based on color imagesegmentation and then statistically analyzed to evaluate the property of bone grafting materialquantitatively. HSI color model, which corresponds with people’s vision system for color is used toachieve ideal segmental results and effective utilization of color information. The S and I variable areused as thresholding condition for image segmentation, thereby obtaining the area of new bone. The effectof BMP contained in BMP/α-TCP is estimated furthermore. Experimental results show that the compositeBMP/α-TCP induce more bone than pure α-TCP in virtue of BMP. This study provides theoretical andexperimental suggestions for clinical applications of BMP/α-TCP
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.2493.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Improved Principal Component Analysis on the Comprehensive Hemocompatibility Evaluation of Biomaterials (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 1231-1234 
    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: Hemocompatibility of a biomaterial is determined by the interactions between its surface andblood. Due to the complicated action mechanism, various effective ways and the multiple affectivefactors of the hemocompatibility, a comprehensive evaluation needs to be built instead of single index.Therefore, the platelet consumption ratio of 10 kinds of biomaterials including Ti6Al4V-TiC-DLCgradient coat material was studied based on image analysis method. Combined with the kinetic clottingtime and the hemolysis ratio, the comprehensive hemocompatibility evaluation of the material is carriedout based on the improved principal component analysis. First, linear transformation of negative index iscarried out. Second, index is under a dimensionless using the logarithmic treatment, then to acquire allvariants’ principal component and their characteristic vectors. Finally, comprehensive evaluation indexof hemocompatibility is constructed. The improved principal component analysis avoids the effect ofcorrelativity among indexes during anaphase evaluation, and can more correctly maintain the originalinformation of indexes. Thus, the research provides a new idea to the comprehensive evaluation ofHemocompatibility
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1231.pdf
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    Paper (German National Licenses)
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