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  • 2005-2009  (15)
  • 1
    Electronic Resource
    Electronic Resource
    What Do Grandmothers Think about Self-esteem? American and Taiwanese Folk Theories Revisited (2005)
    Oxford, UK : Blackwell Publishing Ltd.
    Social development 14 (2005), S. 0 
    Details
    ISSN: 1467-9507
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Psychology
    Notes: The study investigates European American and Taiwanese grandmothers’ folk theories of childrearing and self-esteem, building on an earlier comparison of mothers from the same families. Adopting methods that privilege local meanings, we bring grandmothers’ voices into the conversation about childrearing, thereby contributing to a deeper understanding of intergenerational nuances in folk theories. In each cultural case, 16 grandmothers of 3-year-olds participated in in-depth interviews that were customized according to local communicative norms. Although self-esteem emerged as a central organizing concept in the folk theories of European American mothers, grandmothers spoke in two voices, either echoing their daughters or invoking a counter-discourse of wariness towards self-esteem. By contrast, Taiwanese mothers and grandmothers resembled one another—but differed from their American counterparts—in treating self-esteem as peripheral in childrearing. Results contribute to the growing consensus that self-esteem is a culture-specific childrearing goal and suggest that the European American tendency to valorize self-esteem varies by generation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-9507.2005.00325.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Fracture Parametric Study on Bond Behaviour between FRP Laminates and High Strength Concrete with Experiments (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 348-349 (Sept. 2007), p. 913-916 
    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: Recently, concrete structures deteriorating for various reasons and upgrading by bondingFRP using epoxy resins has attracted significant researches. Experimental studies in literatesindicate that the anchorage between concrete and FRP laminates plays an important role in thereinforcing design. However, few and no special study has extended to high strength concrete. Thisresearch examines the bond behaviour between FRP laminates and high strength concrete. Toobtain the bond strength and regulation of debonding propagation, a simple face shear type bondtest is conducted. With the explicit material and geometric descriptions and the fairly generalboundary conditions, the interfacial fracture energy release rate, Gf of this test model which is thenused to propose the prediction of the bond strength is derived. Comparison of this energy basismodel in prediction of bond strength with the model of Chen & Teng which has a high accuracy inthis area and results from this experiment demonstrates the derived prediction model as a feasibleand effective measure in analyzing the bond behaviour between FRP and high strength concrete
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.348-349.913.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A Study of the Scallop Generation Mechanism in Ultra-Precision Raster Milling (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 364-366 (Dec. 2007), p. 1262-1267 
    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: Ultra-precision raster milling (UPRM) can directly achieve the fabrication of threedimensionalnon-axisymmetric freeform components with nanometeric surface finish and submicrometricform accuracy. During the past few years, a lot of research on computerized numericalcontrol (CNC) machining technologies has been conducted; however, little of this research makesany contribution to UPRM. This paper studies the mechanism of scallop height generation forUPRM. Through analyzing the cutting edge locus and the scallop height generation mechanism, amodel for feed-intervals and for raster-interval scallop height generation, are presented. Parameterssuch as selection of feed direction (vertical cutting and horizontal cutting), feed rate, spindle speed,tool nose radius, swing distance, feed length and raster distance have been taken into considerationin the scallop generation models
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.364-366.1262.pdf
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    A Thermodynamic Approach to Long-Term Deformation and Damage for Polymeric Materials in Hygrothermal Environment (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 312 (June 2006), p. 21-26 
    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: In this paper, a thermodynamic approach is presented to model coupled fluid transport, heat transfer, long-term deformation and damage in polymeric materials. The well-known Gibbs free energy is expressed as a functional of stress, temperature and fluid concentration with damage being introduced as an internal state variable. Constitutive equations for nonlinear viscoelasticmaterials in hygrothermal environments are derived in memory functional forms. The kinetics of damage evolution induced by stress, temperature and fluid is described by a damage function with thermodynamic driving force. Governing equations for mass and heat transfer are obtained from transport laws relating fluid and heat fluxes to gradients of chemical potential difference and temperature. A superposition principle of time, temperature, fluid concentration, stress, and aging isproposed so that long-term property functions may be derived from momentary master curves by horizontal and vertical shifting. The approach provides a theoretical framework for evaluating longterm behavior of polymeric materials in hygrothermal environments from short-term experiments
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.312.21.pdf
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    FEM Simulation of the Residual Stress in the Machined Surface Layer for High-Speed Machining (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 315-316 (July 2006), p. 140-144 
    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: An orthogonal cutting model was presented to simulate high-speed machining (HSM)process based on metal cutting theory and finite element method (FEM). The residual stresses in themachined surface layer were obtained with various cutting speeds using finite element simulation.The variations of residual stresses in the cutting direction and beneath the workpiece surface werestudied. It is shown that the thermal load produced at higher cutting speed is the primary factoraffecting the residual stress in the machined surface layer
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.315-316.140.pdf
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    A Model for Milling Force Prediction in High-Speed End Milling of P20 Mold Steel (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 315-316 (July 2006), p. 856-859 
    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: This paper focuses on developing an empirical model for the prediction of milling forces inhigh-speed end milling of P20 die-mold steel. The spindle speed, feed rate, axial and radial depth ofcut are considered as the affecting factors. The data for establishing the model are derived fromhigh-speed end milling experiments conducted on a 5 axis machining center according to theprinciples of DOE (design of experiments) method. The influences of milling parameters on millingforces are investigated by analyzing the experimental curves. Consequently, multiple-regressionanalysis is applied in developing the empirical model. Furthermore, the significances of the regressionequation and regression coefficients are statistically tested in this paper to validate the model
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.315-316.856.pdf
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    A Study of Micro V-Groove Fabrication in Ultra-Precision Freeform Machining (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 339 (May 2007), p. 286-290 
    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: Optical communication is gaining popularity in telecommunications; most obviouslyevident is the increase in demand for a large variety of fiber optic components. V-groove structurequality is critical to the functionality of the fiber connector as it governs the position of the opticfibers. The main parameters, which determine the V-groove quality, include core pitch, surfaceroughness and the position of centerline. In this paper, a series of cutting conditions were applied toinvestigate the effect of different machining parameters on the V-groove quality. In the experiment,the V-groove structure is machined by a 40° single crystal diamond tool on aluminium alloy withdifferent cutting conditions. Based on the findings, the relationship between the cutting conditions onthe surface roughness was explored. The implications of these findings on the improvement of thesurface finish of V-groove profile are discussed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.339.286.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Predictive Model of Surface Roughness in High-Speed End Milling Process by Factorial Design of Experiments (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 339 (May 2007), p. 189-194 
    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: Predictive models are presented for the surface roughness in high-speed end milling of0.45%C steel and P20 die-mould steel based on statistical test and multiple-regression analysis. Thedata for establishing model is derived from experiments conducted on a high-speed machiningcentre by factorial design of experiments. The significances of the regression equation andregression coefficients are tested in this paper. The effects of milling parameters on surfaceroughness are investigated by analyzing the experimental curves
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.339.189.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Fabrication of Freeform Optics in Ultra-Precision Raster Milling (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 339 (May 2007), p. 412-416 
    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: Recently, the high quality and high productivity in fabrication of freeform optics has beenof primary interest in manufacturing industries, such as die and mould manufacturing, aerospace partmanufacturing, and so forth. However, the fabrication of freeform optics is currently expensive andvastly complex. Ultra-precision raster milling can produce non-rotational symmetric surfaces withsub-micrometric form accuracy and nanometric surface finish without the need for any subsequentpost polishing. While, there is little research work focus on this kind of machining method. This paperpresents a framework of a tool path generation system for freeform surface ultra-precision rastermilling. This system includes model of freeform optics, tool path generator, interference monitor andan optimization model of machining parameters. The tool path generation system can generateinterference free and optimal tool path for machining freeform surfaces. Some simulation results havebeen presented to illustrate the performance of the system
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.339.412.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Treatments with Fracture Mechanics in Debonding of FRP-Strengthened Concrete Beams (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 185-188 
    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: External bonding fiber reinforced polymers (FRP) to the tension faces of reinforcedconcrete (RC) beam as an effective approach of rehabilitation and strengthening of reinforcedstructures have attracted significant interests of researchers in the past decade. Since theload-carrying capacity of RC beams strengthened with the FRP is dominated by interfacialdelaminated failure, the anchorage strength in FRP to concrete bonded joints under shear and thedebonding stress transferring behavior at the end parts of flexural concrete members bonded withFRP have been deeply studied. Recently, methods of fracture mechanics have been introduced intoanalyzing the above issues. Compared with the traditional methods, the analytical models ofexisting fracture mechanics are reviewed and analyzed. Based on them the debonding bearingcapacity of FRP-strengthened RC beams is calculated and the corresponding finite element modelsare created. These models of fracture mechanics are then evaluated with the finite element resultsand the experimental data from author’s and the literature. Some conclusions with engineeringsignificance are drawn
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.185.pdf
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