The Experts below are selected from a list of 267 Experts worldwide ranked by ideXlab platform
Regivan H N Santiago - One of the best experts on this subject based on the ideXlab platform.
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Natural Topology via fuzzy metric
IEEE International Conference on Fuzzy Systems, 2011Co-Authors: Fagner Santana, Regivan H N SantiagoAbstract:In this paper, we propose a Natural way to define topologies by using fuzzy metrics; here the value of the distance between two points is a non-negative fuzzy number. With such Topology, we also define notions like continuity, convergent sequence, Cauchy sequences and complete spaces. As an application, we provide a fixed point theorem quite similar to the classical Banach's theorem.
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FUZZ-IEEE - Natural Topology via fuzzy metric
2011 IEEE International Conference on Fuzzy Systems (FUZZ-IEEE 2011), 2011Co-Authors: Fagner Santana, Regivan H N SantiagoAbstract:In this paper, we propose a Natural way to define topologies by using fuzzy metrics; here the value of the distance between two points is a non-negative fuzzy number. With such Topology, we also define notions like continuity, convergent sequence, Cauchy sequences and complete spaces. As an application, we provide a fixed point theorem quite similar to the classical Banach's theorem.
Fagner Santana - One of the best experts on this subject based on the ideXlab platform.
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Natural Topology via fuzzy metric
IEEE International Conference on Fuzzy Systems, 2011Co-Authors: Fagner Santana, Regivan H N SantiagoAbstract:In this paper, we propose a Natural way to define topologies by using fuzzy metrics; here the value of the distance between two points is a non-negative fuzzy number. With such Topology, we also define notions like continuity, convergent sequence, Cauchy sequences and complete spaces. As an application, we provide a fixed point theorem quite similar to the classical Banach's theorem.
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FUZZ-IEEE - Natural Topology via fuzzy metric
2011 IEEE International Conference on Fuzzy Systems (FUZZ-IEEE 2011), 2011Co-Authors: Fagner Santana, Regivan H N SantiagoAbstract:In this paper, we propose a Natural way to define topologies by using fuzzy metrics; here the value of the distance between two points is a non-negative fuzzy number. With such Topology, we also define notions like continuity, convergent sequence, Cauchy sequences and complete spaces. As an application, we provide a fixed point theorem quite similar to the classical Banach's theorem.
Shahrima Maharubin - One of the best experts on this subject based on the ideXlab platform.
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Hybrid Additive Microfabrication Scaffold Incorporated with Highly Aligned Nanofibers for Musculoskeletal Tissues
Tissue Engineering and Regenerative Medicine, 2019Co-Authors: Dilshan Sooriyaarachchi, Hugo J. Minière, Shahrima Maharubin, George Z. TanAbstract:Background:Latest tissue engineering strategies for musculoskeletal tissues regeneration focus on creating a biomimetic microenvironment closely resembling the Natural Topology of extracellular matrix. This paper presents a novel musculoskeletal tissue scaffold fabricated by hybrid additive manufacturing method.Methods:The skeleton of the scaffold was 3D printed by fused deposition modeling, and a layer of random or aligned polycaprolactone nanofibers were embedded between two frames. A parametric study was performed to investigate the effects of process parameters on nanofiber morphology. A compression test was performed to study the mechanical properties of the scaffold. Human fibroblast cells were cultured in the scaffold for 7 days to evaluate the effect of scaffold microstructure on cell growth. Results:The tip-to-collector distance showed a positive correlation with the fiber alignment, and the electrospinning time showed a negative correlation with the fiber density. With reinforced nanofibers, the hybrid scaffold demonstrated superior compression strength compared to conventional 3D-printed scaffold. The hybrid scaffold with aligned nanofibers led to higher cell attachment and proliferation rates, and a directional cell organization. In addition, there was a nonlinear relationship between the fiber diameter/density and the cell actinfilament density.Conclusion:This hybrid biofabrication process can be established as a highly efficient and scalable platform to fabricate biomimetic scaffolds with patterned fibrous microstructure, and will facilitate future development of clinical solutions for musculoskeletal tissue regeneration.
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Hybrid Additive Microfabrication Scaffold Incorporated with Highly Aligned Nanofibers for Musculoskeletal Tissues
Tissue Engineering and Regenerative Medicine, 2018Co-Authors: Dilshan Sooriyaarachchi, Hugo J. Minière, Shahrima MaharubinAbstract:Background: Latest tissue engineering strategies for musculoskeletal tissues regeneration focus on creating a biomimetic microenvironment closely resembling the Natural Topology of extracellular matrix. This paper presents a novel musculoskeletal tissue scaffold fabricated by hybrid additive manufacturing method.
Dilshan Sooriyaarachchi - One of the best experts on this subject based on the ideXlab platform.
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Hybrid Additive Microfabrication Scaffold Incorporated with Highly Aligned Nanofibers for Musculoskeletal Tissues
Tissue Engineering and Regenerative Medicine, 2019Co-Authors: Dilshan Sooriyaarachchi, Hugo J. Minière, Shahrima Maharubin, George Z. TanAbstract:Background:Latest tissue engineering strategies for musculoskeletal tissues regeneration focus on creating a biomimetic microenvironment closely resembling the Natural Topology of extracellular matrix. This paper presents a novel musculoskeletal tissue scaffold fabricated by hybrid additive manufacturing method.Methods:The skeleton of the scaffold was 3D printed by fused deposition modeling, and a layer of random or aligned polycaprolactone nanofibers were embedded between two frames. A parametric study was performed to investigate the effects of process parameters on nanofiber morphology. A compression test was performed to study the mechanical properties of the scaffold. Human fibroblast cells were cultured in the scaffold for 7 days to evaluate the effect of scaffold microstructure on cell growth. Results:The tip-to-collector distance showed a positive correlation with the fiber alignment, and the electrospinning time showed a negative correlation with the fiber density. With reinforced nanofibers, the hybrid scaffold demonstrated superior compression strength compared to conventional 3D-printed scaffold. The hybrid scaffold with aligned nanofibers led to higher cell attachment and proliferation rates, and a directional cell organization. In addition, there was a nonlinear relationship between the fiber diameter/density and the cell actinfilament density.Conclusion:This hybrid biofabrication process can be established as a highly efficient and scalable platform to fabricate biomimetic scaffolds with patterned fibrous microstructure, and will facilitate future development of clinical solutions for musculoskeletal tissue regeneration.
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Hybrid Additive Microfabrication Scaffold Incorporated with Highly Aligned Nanofibers for Musculoskeletal Tissues
Tissue Engineering and Regenerative Medicine, 2018Co-Authors: Dilshan Sooriyaarachchi, Hugo J. Minière, Shahrima MaharubinAbstract:Background: Latest tissue engineering strategies for musculoskeletal tissues regeneration focus on creating a biomimetic microenvironment closely resembling the Natural Topology of extracellular matrix. This paper presents a novel musculoskeletal tissue scaffold fabricated by hybrid additive manufacturing method.
Angelo Felice Lopez - One of the best experts on this subject based on the ideXlab platform.
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Existence and Density of General Components of the Noether–Lefschetz Locus on Normal Threefolds
International Mathematics Research Notices, 2020Co-Authors: Ugo Bruzzo, Antonella Grassi, Angelo Felice LopezAbstract:Abstract We consider the Noether–Lefschetz problem for surfaces in ${\mathbb Q}$-factorial normal 3-folds with rational singularities. We show the existence of components of the Noether–Lefschetz locus of maximal codimension, and that there are indeed infinitely many of them. Moreover, we show that their union is dense in the Natural Topology.
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Existence and density of general components of the Noether-Lefschetz locus on normal threefolds
arXiv: Algebraic Geometry, 2017Co-Authors: Ugo Bruzzo, Antonella Grassi, Angelo Felice LopezAbstract:We consider the Noether-Lefschetz problem for surfaces in Q-factorial normal 3-folds with rational singularities. We show the existence of components of the Noether-Lefschetz locus of maximal codimension, and that there are indeed infinitely many of them. Moreover, we show that their union is dense in the Natural Topology.
