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  • 2005-2009  (12)
  • 1
    Electronic Resource
    Electronic Resource
    An improved mathematical programming method for wrinkling prediction of cloths (2005)
    Bingley : Emerald
    International journal of clothing science & technology 17 (2005), S. 13-28 
    Details
    ISSN: 0955-6222
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Purpose - An improved mathematical programming method for numerical simulation of cloth wrinkling is investigated. Design/methodology/approach - Cloth is modeled as the network of bars (called bar network) or membrane elements with a special nonlinear mechanical constitutive law in the finite element analysis. Findings - Compared with conventional numerical methods, the proposed method does not depend on stress iteration, but on the base exchanges in the solution of a standard quadratic programming problem. Thus, the new method presents very good convergence behavior and accurate predictions of wrinkling patterns and stress distributions of cloths. Numerical results demonstrate the validity and the efficiency of the proposed method. Originality/value - From the engineering point of view, accurate numerical methods are required in wrinkling analysis of cloth deformation. The algorithm developed here also can be applied into fields such as large deformation under wind load and dynamic behaviors of cloths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/09556220510577934
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  • 2
    Electronic Resource
    Electronic Resource
    Comparative analysis of early H2O2 accumulation in compatible and incompatible wheat–powdery mildew interactions (2005)
    Oxford, UK : Blackwell Science Ltd
    Plant pathology 54 (2005), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Comparative analysis was carried out for hydrogen peroxide (H2O2) accumulation in response to powdery mildew (Blumeria graminis[Erysiphe graminis] f.sp. tritici) primary germ tube (PGT) and appressorial germ tube (AGT) contact, and in papilla (cell wall apposition) and hypersensitive responses (HR) in wheat (Triticum aestivum). Using primary leaves of three susceptible wheat lines (Bainong 3217; Beijing 837; Jingshuang 16) and five resistant lines [Mardler (Pm2 + Pm6); Ulka/8 × Cc (Pm2); Mardler/7 × Bainong 3217 (Pm2); Pm16; Pm16/7 × Beijing 837 (Pm16)], early H2O2 accumulation between 10 and 48 h after inoculation was studied. Strong H2O2 accumulation was found in effective papillae and associated cytosolic vesicles in both susceptible and resistant wheat lines, suggesting the important role of H2O2 in effective papillae formed as a general plant defence against powdery mildew. High frequency of effective papilla formation was observed in all five resistant lines. Among resistant lines, hypersensitive cell death was detected earlier in Mardler and Ulka/8 × Cc than in Pm16 and Pm16/7 × Beijing 837. In all cases this was associated with H2O2 accumulation in attacked epidermal cells. Interestingly, penetration resistance but not HR appeared to be mediated by the Pm2 gene in the Mardler/7 × Bainong 3217 line, suggesting that Pm2 may govern an HR-independent defence pathway in this genetic background. As effective papillae and HR did not occur in the same cells, papilla deposition may be independent of the HR response, despite the fact that both defence mechanisms were associated with high H2O2 accumulation. In wheat powdery mildew-incompatible interactions, HR acts as a second line of defence to contain infection when the papilla defence fails.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.2005.01173.x
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  • 3
    Electronic Resource
    Electronic Resource
    Interplay of electron–lattice interactions and superconductivity in Bi 2 Sr 2 CaCu 2 O 8+ δ (2006)
    [s.l.] : Nature Publishing Group
    Nature 442 (2006), S. 546-550 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Formation of electron pairs is essential to superconductivity. For conventional superconductors, tunnelling spectroscopy has established that pairing is mediated by bosonic modes (phonons); a peak in the second derivative of tunnel current d2I/dV2 corresponds to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature04973
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  • 4
    Electronic Resource
    Electronic Resource
    Polycrystalline Columnar Diamond Film Deposited on Spherical Substrate by DC Arc Plasma CVD (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 134-137 
    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: Diamond film was deposited on spherical molybdenum substrate by DC arc plasma CVDmethod. Diamond film morphology, purities and orientation evolution, obtained from atomic forcemicroscopy, scanning electron microscopy, Raman spectroscopy, X ray diffraction respectively, hasshowed that grains on the growth surface are compact, continuous and uniform. Characteristicdiamond (111), (220), (311) peaks were found and (111) facets were predominant. It revealed thatdiamond film was polycrystalline texture characteristic. There is a typical diamond Raman spectrumpeaks at 1332.0 cm-1, and not graphite and amorphous carbon characteristic peak. High puritydiamond film was deposited. When methane concentration was increased, diamond film has morelocal clusters and vacancy defects such as voids, graphite inclusion, and hydrogen cluster. Therefore,some important parameters such as methane concentration and substrate temperature should beoptimized in depositing diamond film
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.134.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Experimental Study on Cryogenic Polishing Single Silicon Wafer with Nano-Sized Cerium Dioxide Powders (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 24-25 (Sept. 2007), p. 177-182 
    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: Cryogenic polishing single silicon wafer with nano-sized CeO2 abrasives can be known ascryogenic fixed abrasives CMP (CFA-CMP). The abrasive slurry was made of nano-sized CeO2particles dispersed in de-ionized water with a surfactant and the polishing slurry froze to formcryogenic polishing pad. Then the polishing tests of the blanket silicon wafers in the presence of thecryogenic polishing pad containing the nano-particulates were carried out. The morphologies andsurfaces roughness of the polished silicon wafers were observed and examined on an atomic forcemicroscope (AFM). The results show that a super smooth surface with roughness of 0. 293 nm isobtained within 5000 nm× 5000 nm and the removal of material is dominated by plastic flowage
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.24-25.177.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Investigation on the Machining of Thick Diamond Films by EDM Together with Mechanical Polishing (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 24-25 (Sept. 2007), p. 377-382 
    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: Although research on various diamond polishing techniques has been carried for years,some issues still need to be examined in order to facilitate application on large areas in acost-efficient manner. A compositive technique for machining efficiently thick diamond filmsprepared by DC plasma arc jet is reported in the present paper. A two-stage polishing was applied onthick polycrystalline diamond films, by employing first electro-discharge machining (EDM) forrough polishing and subsequently mechanical polishing for finishing operations. Experimentalresults obtained clearly indicate the applicability of the proposed two-stage technique for fabricatingtransparent diamond films that can be used for the production of X-ray windows. Appropriate etchingwith EDM is an effective pretreatment method for enhancing the efficiency of rough polishingprocess in mechanical polishing of thick diamond film. The machined surfaces of diamond films arestudied by Scanning Electron Microscope (SEM) and Raman Scattering Spectroscopy (Raman)
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.24-25.377.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Application of Nanometer-Scale Processing Technique in High-Density Recording (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 291-292 (Aug. 2005), p. 407-412 
    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: To realize ultrahigh density recording in high precision using polycarbonate as a recording media, the nanometer-scale mechanical processing properties of polycarbonate and fluorocarbon plasma-treated polycarbonate were investigated using atomic force microscopy (AFM). The surface free energy of the polycarbonate specimen can be reduced by fluorocarbon plasma-treatment,resulting in processing force being reduced. Thus, nanometer-scale precise processing of polycarbonate can be realized. Lines and spaces with intervals minimized to 60 nm were performed on the fluorocarbon plasma-treated polycarbonate. Viscoelastic properties of the fluorinated polycarbonate were evaluated using AFM in force modulation mode. Fluorocarbon plasma treatmentcan reduce friction force of a polycarbonate sample and improve its wear resistance. Therefore, the friction durability corresponding to the reliability of data reproduction was markedly improved
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/49/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.291-292.407.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Nano Mechanical Processing of Silicon by Atomic Force Microscopy (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 291-292 (Aug. 2005), p. 401-406 
    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: Nanometer-scale protuberance and groove processing was performed on a silicon (Si) surface by diamond tip sliding using atomic force microscopy (AFM). The protuberances of 0-5 nm height were obtained the silicon surface by using the diamond tip of approximately 200 nm radius and the grooves of 0-2 nm depth were processed by the tip of about 50 nm radius. It was observed that both protuberance and groove were produced using the tip of about 100 nm radius. Indentationmeasurements show the hardness of processed parts was greater than that of unprocessed parts. Potassium hydroxide (KOH) solution etching was performed on the mechanochemically processed sample. The processed areas were prevented from etching due to the formation of a dense oxide layer. This may be because the processed parts were oxidized by tip sliding due to the effect ofmechanochemical oxidation
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/49/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.291-292.401.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Preparation of Turbulated Cooling Hole for Gas Turbine Blade Using Electrochemical Machining (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 329 (Jan. 2007), p. 699-704 
    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: With the development of high performance of gas turbine engine, there is a tendency todesign the ribs in the cooling hole in order to improve the heat transfer and cooling efficiency in acooling passage. This paper focuses on a machining method of the burbulated cooling hole. Thecooling hole is formed by electrochemical machining (ECM) process using a shaped electrode. Theribs on the hole wall form using ECM after the shaped electrode is lowed into the bottom of thestraight hole machined in advance. The experimental results indicate that machining efficiencyincreases obviously. Various parameters affecting the forming of the cooling hole, such as voltages,electrolyte concentrations, and the material of the workpiece, are discussed in detail. Furthermore,the flow field and temperature field of the different type of cooling hole are analyzed usingcomputational fluid dynamics (CFD) model and finite element method. Result shows that the heattransfer coefficient in rib channels could enhances significantly
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.329.699.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Simulation of Cold Ring Rolling Based on Rate Dependent Crystal Plasticity (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 561-565 (Oct. 2007), p. 1813-1817 
    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: Material behaviors of anisotropy and rate sensitivity affect cold ring rolling greatly. So, aself-developed incremental model of rate dependent crystal plasticity (RDCP) is utilized to forecastthe deformation characteristics of this forming process based on a 3D FE model underABAQUS/Explicit environment. The results show that the model of RDCP captures materialbehaviors of anisotropy and rate sensitivity better in this forming process by the comparison with themodel of J2 plasticity; with the decrease of rate sensitivity coefficient, the forming process becomesmore unstable with smaller rolling force and growth in ring radial direction; with the increase of feedrate of idle roll, the deformation of ring becomes more even while the rolling force becomes larger
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.1813.pdf
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