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  • 2005-2009  (17)
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Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    A Flow Sensor for Liquids Based on Single-Walled Carbon Nanotube Thin Films (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 121-123 (Mar. 2007), p. 75-79 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: An angular velocity of flow sensor for liquids based on single-walled carbon nanotubethin films is presented. The carbon nanotubes in this study were fabricated on Si substrate by hotfilament chemical vapor deposition (CVD). The experimental results showed that the flow-inducedcurrent on the surface of carbon nanotube thin films was closely depended upon the angularvelocity, concentration, properties and temperature of the liquids. The current increased withincreasing angular velocity, concentration and temperature of the liquids. In this study, the liquidssuch as water, NaCl solution and other electrolyte were flowing over the sensor. The resultsobtained were also discussed. The theoretical and experimental studies have shown that there waselectronic friction and electron drag effect of carbon nanotubes in flowing liquids. This effect incarbon nanotubes can be used for a new flow sensor
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.121-123.75.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Ab Initio Simulations of the Nucleation of Single-Walled Carbon Nanotubes (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 121-123 (Mar. 2007), p. 1037-1040 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: We investigated the nucleation of SWNTs and the role of metallic catalyst using firstprinciplescalculations. To avoid dangling bonds a closed cap forms on a metal surface. 6 pentagonalrings are introduced into the cap, which reduces the strain energy. A unique tube chirality then growsfrom the cap, which is controlled by the metal lattice at the nucleation stage. We found that chiralityof nanotubes affects the bond energies, including dangling bonds, carbon-carbon bonds & carbonmetalbonds
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.121-123.1037.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Modern Data Information Retrieval and an Approach towards Content-Based Collaborative System (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Applied mechanics and materials Vol. 10-12 (Dec. 2007), p. 62-66 
    Details
    ISSN: 1662-7482
    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: With the fast deploying and development of information sharing technologies, the Internethas been extensively applied by modern enterprises to pursue a good, efficient communication withtheir customers and thus research activities supported by global companies zealously motivate ontothe Internet which can be used to advertise their products and provide relevant information withindesign and manufacturing process. Modern enterprises of manufacturing utilize the benefits of globalresource from Internet to make the solution which could cut cycle time and reduce costs during theprocedure of product design, development and manufacturing. Due to positive development ofgraphic technologies and 3D modelling tools, Internet is used as an infrastructure to develop newsystem and explore potential market by modern enterprises on account of the power of sharing text,value and data but also supports dynamic media such as delivering of high quality and interactive 3Dgraphical content. In the meantime, much work has been done by companies and numerous modellingsystems have been developed to build three-dimensional detailed solid which focuses on designinguseful parts and shapes using CAD/CAM technologies. Regarding to the increasing quantities of 3Dmodels and requirement of designers based on design reuse in practice, the investigations suggest theachievement of shape data retrieval is viable and a characteristic 3D model search tool is welcome.This paper presents the framework of web-based system and technologies applied in design and therelated barrier to implementation is identified. A method for collection 3D data is described andinevitable recursive analysis and relevant equation are induced
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/38/transtech_doi~10.4028%252Fwww.scientific.net%252FAMM.10-12.62.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Simulation System for Quality Prediction and Parameters Optimization when Machining Ceramics Die Material (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 53-54 (July 2008), p. 299-303 
    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: A simulation system was developed to forecast machining quality and optimize grindingparameters for the machining of ceramic die material. The system can forecast the surface quality ofmachined ceramic die material with high precision, optimize machining parameters and analyze thedominant factors. Based on the process database, the simulation system is applicable to variousmachining methods. It can help to raise the automaticity for the machining of ceramic die materialand develop the farther intelligent system
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.53-54.299.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Material Constitutive Model of 2Cr13 for FEA of Chip Formation Process (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Applied mechanics and materials Vol. 10-12 (Dec. 2007), p. 796-800 
    Details
    ISSN: 1662-7482
    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 prediction accuracy of the simulation of cutting process is related with thedescription of the nonlinear behavior of material at extremely high strain, strain rate andtemperature in machining. In this paper, an integral Johnson-Cook model is presented tocharacterize the mechanical behavior of work materials in machining, and the parameters in themodel are determined by fitting the data from both quasi-static compression and cutting tests. Thenthe material equation of 2Cr13 stainless steel is derived with this method and used in the finiteelement model of orthogonal cutting with carbide tools. At last, the simulation result is verified withexperimental data
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/38/transtech_doi~10.4028%252Fwww.scientific.net%252FAMM.10-12.796.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Guiding Bone Regeneration with a Novel Biodegradable Polymeric Membrane and Bioceramic Bone Grafts around Dental Implants (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 330-332 (Feb. 2007), p. 1417-1420 
    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 aim of this study is to evaluate treatment effects of novel GBR membranes (PDLLAmembranes) applied to bony defects around dental implants on new bone regeneration alone or incombination with bioceramic bone graft (BIO-OSS®) on the mongrel dog model in comparisonwith collagen membrane (BIO-GIDE®) and therefore to assess the clinical values of the novel GBRmembranes and bioceramic bone graft material in dental implantology. 6 implants were placed inbilateral mandibular of each mongrel dog after preparation of mid- crestal defects. The defects onone side were covered with PDLLA membranes alone or with bone graft, while the contra-lateralsides received collagen membranes alone or with bone graft. These animals were sacrificed at 2, 4,8,12 weeks post the GBR-operation. And gross sample examination, standardized radiographs,99mTc-MDP SPECT and histomorphometric analysis were taken. All examinations showed similaramounts of newly formed bone beneath both types of barriers. The PDLLA or collagen membranewith bone graft groups showed better results than the membrane used alone groups. The resultsindicated that PDLLA membranes especially with bioceramic bone graft presented an improvedresponse in dealing with bony defects around implants
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.330-332.1417.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesis and Characteristic of Hierarchically Porous Zirconium Oxide Doped with Yttrium (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 121-123 (Mar. 2007), p. 5-8 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: A novel and thermally stable hierarchically porous yttrium doped zirconiamaterial with crystallized framework has been synthesized in a facile process. XRD,nitrogen adsorption analysis, FESEM, FETEM, were used for the structuralcharacterizations. This novel hierarchically porous zirconia shows a well-definedordered macroporous structure, a broad distributed mesoviods, and a very uniformmesoporous pore-distribution. Small amount of yttrium can be helpful to increase thethermal stability of the prepared hierarchically porous zirconium oxide
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.121-123.5.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Decreases in phosphoinositide-3-kinase/Akt and extracellular signal-regulated kinase 1/2 signaling activate components of spinal motoneuron death (2005)
    Oxford, UK : Blackwell Science Ltd
    Journal of neurochemistry 94 (2005), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Motoneuron dependence on target-derived trophic factors during development is well established, with loss of trophic support leading to the death of these cells. A complete understanding of the intracellular signal transduction machinery associated with extracellular survival signals requires the examination of individual pathways in various cellular and environmental contexts. In cells deprived of trophic support, and hence compromised for survival, phosphoinositide-3-kinase (PI3K) is decreased when compared with healthy cells supplied with trophic support. Extracellular signal-regulated kinase 1/2 (ERK1/2) signaling is dramatically decreased in deprived cells. We have examined the role of these two pathways to understand how changes in their activity regulate motoneuron survival and death. Pharmacological inhibition of PI3K attenuated motoneuron survival and was important in the regulation of Bcl-2 serine phosphorylation, limited release of cytochrome c into the cytoplasm and caspase activation. Bax translocation from cytoplasm to mitochondria was not altered when PI3K was inhibited. High levels of ERK1/2 inhibition robustly attenuated motoneuron survival in cells supplied with trophic support, whereas moderate inhibition of ERK1/2 activation had little effect. ERK1/2 inhibition in these cells decreased Bcl-2 phosphorylation and resulted in release of cytochrome c from the mitochondria. Bax translocation and caspase activation were not affected by ERK1/2 inhibition. These data reveal that changes in PI3K and ERK1/2 signaling lead to individual and overlapping effects on the cell-death machinery. Characterizing the role of these pathways is critical for a fundamental understanding of the development and degeneration of specific neuronal populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.2005.03320.x
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  • 9
    Electronic Resource
    Electronic Resource
    Response of crayfish, Procambarus clarkii, haemocytes infected by white spot syndrome virus (2005)
    Oxford, UK : Blackwell Science Ltd
    Journal of fish diseases 28 (2005), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: White spot syndrome virus (WSSV) is a serious pathogen of aquatic crustaceans. Little is known about its transmission in vivo and the immune reaction of its hosts. In this study, the circulating haemocytes of crayfish, Procambarus clarkii, infected by WSSV, and primary haemocyte cultures inoculated with WSSV, were collected and observed by transmission electron microscopy and light microscopy following in situ hybridization. In ultra-thin sections of infected haemocytes, the enveloped virions were seen to be phagocytosed in the cytoplasm and no viral particles were observed in the nuclei. In situ hybridization with WSSV-specific probes also demonstrated that there were no specific positive signals present in the haemocytes. Conversely, strong specific positive signals showed that WSSV replicated in the nuclei of gill cells. As a control, the lymphoid organ of shrimp, Penaeus monodon, infected by WSSV was examined by in situ hybridization which showed that WSSV did not replicate within the tubules of the lymphoid organ. In contrast to previous studies, it is concluded that neither shrimp nor crayfish haemocytes support WSSV replication.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2761.2004.00607.x
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  • 10
    Electronic Resource
    Electronic Resource
    Oral health-related quality of life of stroke survivors on discharge from hospital after rehabilitation (2005)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 32 (2005), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: summary The study aimed to investigate oral health-related quality of life (OHR-QoL) of stroke survivors on hospital discharge after rehabilitation. It was a cross-sectional study involving 43 elderly survivors of mild to moderate stroke about to be discharged from hospital after rehabilitation and a comparison group of 43 community-dwelling elderly people. The Medical Outcomes Short Form 36 (SF-36) measure, the General Oral Health Assessment Index (GOHAI) and an oral health transition scale were administered prior to a dental examination. Median SF-36 subscale scores were significantly different between groups (P 〈 0·05). In physical function, role-physical, role-emotional and mental health domains, stroke survivors had significantly lower scores indicating poorer health. The median GOHAI score for the stroke group was 52 and 54 for the comparison group with no significant difference between groups although more stroke survivors had difficulty speaking compared with the comparison group. About 75% of stroke survivors considered their appearance to be worse, half of them felt that speech was worse and about a third had difficulty chewing hard food compared with the pre-stroke condition (P 〈 0·05). Most participants were partially dentate with no significant difference in DMFT scores or prosthetic status between groups (P 〉 0·05). Health-related quality of life in general was significantly poorer after stroke although patients were considered physically well enough to be discharged from hospital. There was some impairment of OHR-QoL. The nature of the stroke, the hospital environment including diet, coping strategies and elderly Chinese peoples’ perception of health should be taken into account when interpreting measures of health status in stroke survivors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.2005.01451.x
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