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Your search keyword '"Bisegna, Paolo"' showing total 194 results
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194 results on '"Bisegna, Paolo"'

4. Collapse capacity of masonry domes under horizontal loads: A static limit analysis approach

Author

Nodargi, Nicola A. and Bisegna, Paolo

Subjects
Mathematics - Numerical Analysis, 65N08, G.1.8
Abstract

A static limit analysis approach is proposed for assessing the collapse capacity of axisymmetric masonry domes subject to horizontal forces. The problem formulation is based on the sound theoretical framework provided by the classical statics of shells. After introducing the shell stress tensors on the dome mid-surface, integral equilibrium equations are enforced for its typical part. Heyman's assumptions of infinite compressive and vanishing tensile strengths are made, with cohesionless friction behavior governing the shear strength, to characterize the admissible stress states in the dome. An original computational strategy is developed to address the resulting static limit analysis problem, involving the introduction of a mesh on the dome mid-surface, the interpolation of the physical components of the shell stress tensors on the element boundaries, and the imposition of equilibrium and admissibility conditions respectively for the elements and at the nodes of the mesh. The descending discrete convex optimization problem is solved by standard and effective optimization tools, automatically providing collapse multiplier of horizontal forces, incipient collapse mechanism and expected crack pattern. Convergence analysis, validation with experimental results available in the literature, and parametric analyses with respect to geometric parameters and friction coefficient, are presented for spherical and ellipsoidal masonry domes, proving the reliability of the proposed approach for estimating the pseudo-static seismic resistance of masonry domes., Comment: 29 pages, 11 figures

Published
2021

14. Real-time impedance-activated dielectrophoretic actuation for reconfigurable manipulation of single flowing particles.

Author

Lefevre, Alexis, Brandi, Cristian, De Ninno, Adele, Ruggiero, Filippo, Verona, Enrico, Gauthier, Michaël, Bisegna, Paolo, Bolopion, Aude, and Caselli, Federica

Subjects
ONLINE algorithms, GRANULAR flow, CYTOMETRY, DIELECTROPHORESIS, PROOF of concept, LOGIC
Abstract

This work presents an innovative all-electrical platform for selective single-particle manipulation. The platform combines microfluidic impedance cytometry for label-free particle characterization and dielectrophoresis for contactless multi-way particle separation. The microfluidic chip has a straightforward coplanar electrode layout and no particle pre-focusing mechanism is required. An original online algorithm analyzes the impedance signals of each incoming particle and regulates in real time the dielectrophoretic voltages according to a desired control logic. As a proof-of-concept, three operation modes are demonstrated on a mixture of 8, 10, and 12 µm diameter beads: (i) particle position swapping across the channel axis, irrespective of particle size, (ii) size-based particle separation, irrespective of particle position, and (iii) sorting of a selected sequence of particles. As a perspective, the versatility of impedance cytometry and dielectrophoresis, and the possibility of configuring alternative control logics, hold promise for advanced particle and cell manipulation. [ABSTRACT FROM AUTHOR]

Published
2024
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20. A Mixed Membrane Finite Element for Masonry Structures

Author

Nodargi, Nicola A., Bisegna, Paolo, Chaari, Fakher, Series Editor, Haddar, Mohamed, Series Editor, Kwon, Young W., Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Carcaterra, Antonio, editor, Paolone, Achille, editor, and Graziani, Giorgio, editor

Published
2020
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25. Improving Piezoelectric Sensitivity

Author

Topolov, Vitaly Yu., Bowen, Christopher R., Bisegna, Paolo, Hull, Robert, Series Editor, Jagadish, Chennupati, Series Editor, Kawazoe, Yoshiyuki, Series Editor, Osgood, Richard M., Series Editor, Parisi, Jürgen, Series Editor, Pohl, Udo W., Series Editor, Seong, Tae-Yeon, Series Editor, Uchida, Shin-ichi, Series Editor, Wang, Zhiming M., Series Editor, Topolov, Vitaly Yu., Bowen, Christopher R., and Bisegna, Paolo

Published
2018
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26. Piezoelectric Coefficients : New Opportunities to Improve Sensitivity

Author

Topolov, Vitaly Yu., Bowen, Christopher R., Bisegna, Paolo, Hull, Robert, Series Editor, Jagadish, Chennupati, Series Editor, Kawazoe, Yoshiyuki, Series Editor, Osgood, Richard M., Series Editor, Parisi, Jürgen, Series Editor, Pohl, Udo W., Series Editor, Seong, Tae-Yeon, Series Editor, Uchida, Shin-ichi, Series Editor, Wang, Zhiming M., Series Editor, Topolov, Vitaly Yu., Bowen, Christopher R., and Bisegna, Paolo

Published
2018
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27. Microgeometry of Composites and Their Piezoelectric Coefficients

Author

Topolov, Vitaly Yu., Bowen, Christopher R., Bisegna, Paolo, Hull, Robert, Series Editor, Jagadish, Chennupati, Series Editor, Kawazoe, Yoshiyuki, Series Editor, Osgood, Richard M., Series Editor, Parisi, Jürgen, Series Editor, Pohl, Udo W., Series Editor, Seong, Tae-Yeon, Series Editor, Uchida, Shin-ichi, Series Editor, Wang, Zhiming M., Series Editor, Topolov, Vitaly Yu., Bowen, Christopher R., and Bisegna, Paolo

Published
2018
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28. Piezoelectric Coefficients : Combination of Properties at Specific Microgeometry

Author

Topolov, Vitaly Yu., Bowen, Christopher R., Bisegna, Paolo, Hull, Robert, Series Editor, Jagadish, Chennupati, Series Editor, Kawazoe, Yoshiyuki, Series Editor, Osgood, Richard M., Series Editor, Parisi, Jürgen, Series Editor, Pohl, Udo W., Series Editor, Seong, Tae-Yeon, Series Editor, Uchida, Shin-ichi, Series Editor, Wang, Zhiming M., Series Editor, Topolov, Vitaly Yu., Bowen, Christopher R., and Bisegna, Paolo

Published
2018
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29. Effective Piezoelectric Coefficients : From Microgeometry to Anisotropy

Author

Topolov, Vitaly Yu., Bowen, Christopher R., Bisegna, Paolo, Hull, Robert, Series Editor, Jagadish, Chennupati, Series Editor, Kawazoe, Yoshiyuki, Series Editor, Osgood, Richard M., Series Editor, Parisi, Jürgen, Series Editor, Pohl, Udo W., Series Editor, Seong, Tae-Yeon, Series Editor, Uchida, Shin-ichi, Series Editor, Wang, Zhiming M., Series Editor, Topolov, Vitaly Yu., Bowen, Christopher R., and Bisegna, Paolo

Published
2018
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30. The Piezoelectric Medium and Piezoelectric Sensitivity

Author

Topolov, Vitaly Yu., Bowen, Christopher R., Bisegna, Paolo, Hull, Robert, Series Editor, Jagadish, Chennupati, Series Editor, Kawazoe, Yoshiyuki, Series Editor, Osgood, Richard M., Series Editor, Parisi, Jürgen, Series Editor, Pohl, Udo W., Series Editor, Seong, Tae-Yeon, Series Editor, Uchida, Shin-ichi, Series Editor, Wang, Zhiming M., Series Editor, Topolov, Vitaly Yu., Bowen, Christopher R., and Bisegna, Paolo

Published
2018
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33. On the compatibility of single-cell microcarriers (nanovials) with microfluidic impedance cytometry.

Author

Brandi, Cristian, De Ninno, Adele, Ruggiero, Filippo, Limiti, Emanuele, Abbruzzese, Franca, Trombetta, Marcella, Rainer, Alberto, Bisegna, Paolo, and Caselli, Federica

Subjects
CYTOMETRY, SHEARING force, STROMAL cells, SHEAR walls, CELL growth
Abstract

We investigate for the first time the compatibility of nanovials with microfluidic impedance cytometry (MIC). Nanovials are suspendable crescent-shaped single-cell microcarriers that enable specific cell adhesion, the creation of compartments for undisturbed cell growth and secretion, as well as protection against wall shear stress. MIC is a label-free single-cell technique that characterizes flowing cells based on their electrical fingerprints and it is especially targeted to cells that are naturally in suspension. Combining nanovial technology with MIC is intriguing as it would represent a robust framework for the electrical analysis of single adherent cells at high throughput. Here, as a proof-of-concept, we report the MIC analysis of mesenchymal stromal cells loaded in nanovials. The electrical analysis is supported by numerical simulations and validated by means of optical analysis. We demonstrate that the electrical diameter can discriminate among free cells, empty nanovials, cell-loaded nanovials, and clusters, thus grounding the foundation for the use of nanovials in MIC. Furthermore, we investigate the potentiality of MIC to assess the electrical phenotype of cells loaded in nanovials and we draw directions for future studies. [ABSTRACT FROM AUTHOR]

Published
2024
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42. Rapid Assessment of Susceptibility of Bacteria and Erythrocytes to Antimicrobial Peptides by Single-Cell Impedance Cytometry

Author

Troiano, Cassandra, primary, De Ninno, Adele, additional, Casciaro, Bruno, additional, Riccitelli, Francesco, additional, Park, Yoonkyung, additional, Businaro, Luca, additional, Massoud, Renato, additional, Mangoni, Maria Luisa, additional, Bisegna, Paolo, additional, Stella, Lorenzo, additional, and Caselli, Federica, additional

Published
2023
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