@article{kim_nelson_pourdeyhimi_2021, title={Development of a novel test method for the measurement of fuzz in nonwovens}, volume={6}, ISSN={["1754-2340"]}, DOI={10.1080/00405000.2021.1939517}, abstractNote={Abstract Quantitative evaluation of fuzz in nonwovens is of significant interest as nonwoven products are typically subjected to abrasion during service. In this work, the initial level of fuzz and its growth were quantified for polypropylene (PP) spunbond thermally point-bonded nonwovens in three different basis weights representing the range of nonwovens used in most disposable products. We used noncontact confocal laser microscopy coupled with three-dimensional image analysis to quantify the volume of fuzz. Fuzz data generated by using this novel test set-up was verified by statistical analysis, resulting in repeatable and reproducible results. This represents the first in a series of publications dedicated to the study of fuzz.}, journal={JOURNAL OF THE TEXTILE INSTITUTE}, author={Kim, Eunyoung and Nelson, DeeAnn and Pourdeyhimi, Behnam}, year={2021}, month={Jun} }
 @article{kim_guilak_haider_2010, title={An Axisymmetric Boundary Element Model for Determination of Articular Cartilage Pericellular Matrix Properties In Situ via Inverse Analysis of Chondron Deformation}, volume={132}, ISSN={0148-0731}, url={http://dx.doi.org/10.1115/1.4000938}, DOI={10.1115/1.4000938}, abstractNote={The pericellular matrix (PCM) is the narrow tissue region surrounding all chondrocytes in articular cartilage and, together, the chondrocyte(s) and surrounding PCM have been termed the chondron. Previous theoretical and experimental studies suggest that the structure and properties of the PCM significantly influence the biomechanical environment at the microscopic scale of the chondrocytes within cartilage. In the present study, an axisymmetric boundary element method (BEM) was developed for linear elastic domains with internal interfaces. The new BEM was employed in a multiscale continuum model to determine linear elastic properties of the PCM in situ, via inverse analysis of previously reported experimental data for the three-dimensional morphological changes of chondrons within a cartilage explant in equilibrium unconfined compression (Choi, et al., 2007, “Zonal Changes in the Three-Dimensional Morphology of the Chondron Under Compression: The Relationship Among Cellular, Pericellular, and Extracellular Deformation in Articular Cartilage,” J. Biomech., 40, pp. 2596–2603). The microscale geometry of the chondron (cell and PCM) within the cartilage extracellular matrix (ECM) was represented as a three-zone equilibrated biphasic region comprised of an ellipsoidal chondrocyte with encapsulating PCM that was embedded within a spherical ECM subjected to boundary conditions for unconfined compression at its outer boundary. Accuracy of the three-zone BEM model was evaluated and compared with analytical finite element solutions. The model was then integrated with a nonlinear optimization technique (Nelder–Mead) to determine PCM elastic properties within the cartilage explant by solving an inverse problem associated with the in situ experimental data for chondron deformation. Depending on the assumed material properties of the ECM and the choice of cost function in the optimization, estimates of the PCM Young's modulus ranged from ∼24 kPa to 59 kPa, consistent with previous measurements of PCM properties on extracted chondrons using micropipette aspiration. Taken together with previous experimental and theoretical studies of cell-matrix interactions in cartilage, these findings suggest an important role for the PCM in modulating the mechanical environment of the chondrocyte.}, number={3}, journal={Journal of Biomechanical Engineering}, publisher={ASME International}, author={Kim, Eunjung and Guilak, Farshid and Haider, Mansoor A.}, year={2010}, pages={031011} }
 @article{kim_guilak_haider_2008, title={The dynamic mechanical environment of the chondrocyte: A biphasic finite element model of cell-matrix interactions under cyclic compressive loading}, volume={130}, number={6}, journal={Journal of Biomechanical Engineering}, author={Kim, E. J. and Guilak, F. and Haider, M. A.}, year={2008} }