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  • Open Access


    Measurement and Analysis of Three-Dimensional Surface Topography of Sawn Timber Based on Scanning Probe Method

    Yuhang He1, Rongzhuo Zhang1, Sarah Mohrmann2, Zheng Wang1,*, Jiujin Fang3

    Journal of Renewable Materials, Vol.10, No.12, pp. 3303-3311, 2022, DOI:10.32604/jrm.2022.020681

    Abstract In order to explore the characteristics of the three-dimensional surface morphology of sawn timber, a threedimensional wood surface morphology tester based on the scanning probe method and the principle of atomic force microscope was used to test the three-dimensional surface morphology of three kinds of sawn timber and calculate its surface roughness. This study also analyzed the reasonable plan for the value of wood surface roughness and the advantages of the three-dimensional shape tester, as well as the influence of tree species, three sections, air-dry density and other factors on the surface roughness of the specimen after mechanical processing. The… More >

  • Open Access


    Implant surface features as key role on cell behavior


    BIOCELL, Vol.46, No.5, pp. 1151-1156, 2022, DOI:10.32604/biocell.2022.018026

    Abstract It has been recognized that physical and chemical properties of biomaterial surfaces mediate the quality of extracellular matrix (ECM) that may affect cell behaviors. In nature, ECM is a heterogeneous three-dimensional superstructure formed by three major components, glycosaminoglycan, glycoconjugate, and protein, that anchors cellular compartments in tissues and regulates the function and the behavior of cells. Changes in the biointerface alter the quality of ECM and morphology through cell surface receptors, which, in turn, enable it to trigger specific cell signaling and different cellular responses. In fact, a number of strategies have been used to improve the functionality of surfaces… More >

  • Open Access


    Surface Topography Assessments of Spine Shape Change within the Day in Healthy Male Adults

    Jianming Lu1,*, Liangliang Xiang2, Huw Wiltshire3

    Molecular & Cellular Biomechanics, Vol.18, No.3, pp. 123-129, 2021, DOI:10.32604/mcb.2021.015993

    Abstract Surface topography is a no-invasive, radiation-free method that can measure sufficient surface spine parameters by the structured back surface scan and a precise anatomical landmarks recognition. The purpose of the present study was to measure the spine shape parameter changes within the day via the DIERS Formetric 4D analysis system. Ten male healthy volunteers were recruited to participate in the experiment. All participants were sedentary people with the average sitting time during study or work t ≥ 8 h and without any back disease in the past six months. Data were analyzed by one-way ANOVA, which set time points within… More >

  • Open Access


    Numerical Simulation of 3D Rough Surfaces and Analysis of Interfacial Contact Characteristics

    Guoqing Yang1, Baotong Li2,3, Yang Wang2, Jun Hong2

    CMES-Computer Modeling in Engineering & Sciences, Vol.103, No.4, pp. 251-279, 2014, DOI:10.3970/cmes.2014.103.251

    Abstract Mechanical behaviors arising at the contact interface largely depend on its surface topographies, particularly when it comes to rough surfaces. A numerical simulation based on an appropriate characterization of rough surfaces especially in terms of three dimensional can be of great significance when it comes to capturing the deformation patterns of micro-scale contacts. In this paper, a simple and practical scheme is developed to generate 3D rough surfaces and to analyze and evaluate the contact characteristics. Firstly amplitude and spatial statistical characterizations of asperities are introduced to avert from the redundancy of topography data caused by traditional measuring methods. A… More >

  • Open Access


    Thin Film Flow Over and Around Surface Topography: a General Solver for the Long-Wave Approximation and Related Equations

    P.H. Gaskell1, Y.C. Lee2, H.M. Thompson1

    CMES-Computer Modeling in Engineering & Sciences, Vol.62, No.1, pp. 77-112, 2010, DOI:10.3970/cmes.2010.062.077

    Abstract The three-dimensional flow of a gravity-driven continuous thin liquid film on substrates containing micro-scale features is modelled using the long-wave lubrication approximation, encompassing cases when surface topography is either engulfed by the film or extends all the way though it. The discrete analogue of the time-dependent governing equations is solved accurately using a purpose designed multigrid strategy incorporating both automatic error-controlled adaptive time stepping and local mesh refinement/de-refinement. Central to the overall approach is a Newton globally convergent algorithm which greatly simplifies the inclusion of further physics via the solution of additional equations of the same form as the base… More >

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