The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Paolo Dario - One of the best experts on this subject based on the ideXlab platform.
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A novel haptic platform for real time bilateral biomanipulation with a MEMS sensor for triaxial Force feedback
Sensors and Actuators A-physical, 2008Co-Authors: Arne Sieber, Keith Houston, Clemens Eder, Oliver Tonet, Pietro Valdastri, Arianna Menciassi, Paolo DarioAbstract:Abstract A novel triaxial Force sensing device developed by the authors with a MEMS sensor as core component is mounted on a subnanometric resolution nanomanipulator having three degrees of freedom (DOF). This sensorized device allows measuring Forces on the nanomanipulator tip in the range of 0–3 N for normal and ±50 mN for tangential Forces with a resolution of 11 bits. Together with a haptic input device, a setup was created allowing palpation and Force feeling. The mathematical model used to drive the master haptic Interface Force feedback capabilities is based on online Force and stiffness measurement. The performance of the novel setup is demonstrated with a cell palpation experiment.
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A novel haptic platform for real time bilateral biomanipulation with a MEMS sensor for triaxial Force feedback
Sensors and Actuators A: Physical, 2008Co-Authors: Arne Sieber, Keith Houston, Clemens Eder, Oliver Tonet, Pietro Valdastri, Arianna Menciassi, Paolo DarioAbstract:A novel triaxial Force sensing device developed by the authors with a MEMS sensor as core component is mounted on a subnanometric resolution nanomanipulator having three degrees of freedom (DOF). This sensorized device allows measuring Forces on the nanomanipulator tip in the range of 0-3 N for normal and ±50 mN for tangential Forces with a resolution of 11 bits. Together with a haptic input device, a setup was created allowing palpation and Force feeling. The mathematical model used to drive the master haptic Interface Force feedback capabilities is based on online Force and stiffness measurement. The performance of the novel setup is demonstrated with a cell palpation experiment. © 2007 Elsevier B.V. All rights reserved.
Hendrik Heinz - One of the best experts on this subject based on the ideXlab platform.
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Force Field Model of Alite Based on Stoichiometric Analysis
2020Co-Authors: Ratan K Mishra, Robert J. Flatt, Hendrik HeinzAbstract:Tricalcium silicate is the most abundant phase of Portland cement clinker. The presence of common chemical impurities such as Mg, Al 2 O 3 and Fe 2 O 3 is primarily significant due to its major impact on surface reactivity as well as considerable effects on structural, interfacial and transport properties, in addition to organic adsorption. The present study provides the first Force field model of alite based on stoichiometric analysis. Alite model is developed on the basis of Interface Force field parameters validated for pure C 3 S atomistic model. Modeling of defect sites have been performed by two types of substitution: iso-stoichiometric defects (Ca → Mg) and non-stoichiometric substitution, such as Al 2 O 3 or Fe 2 O 3 .
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Prediction of specific biomolecule adsorption on silica surfaces as a function of pH and particle size
Chemistry of Materials, 2014Co-Authors: Fateme S Emami, Valeria Puddu, Rajiv Berry, Vikas Varshney, Siddharth V. Patwardhan, Carole C. Perry, Hendrik HeinzAbstract:Silica nanostructures are biologically available and find wide applications for drug delivery, catalysts, separation processes, and composites. However, specific adsorption of biomolecules on silica surfaces and control in biomimetic synthesis remain largely unpredictable. In this contribution, the variability and control of peptide adsorption on silica nanoparticle surfaces are explained as a function of pH, particle diameter, and peptide electrostatic charge using molecular dynamics simulations with the CHARMM-Interface Force field. Adsorption free energies and specific binding residues are analyzed in molecular detail, providing experimentally elusive, atomic-level information on the complex dynamics of aqueous electric double layers in contact with biological molecules. Tunable contributions to adsorption are described in the context of specific silica surface chemistry, including ion pairing, hydrogen bonds, hydrophobic interactions, and conformation effects. Remarkable agreement is found for compute...
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thermodynamically consistent Force fields for the assembly of inorganic organic and biological nanostructures the Interface Force field
Langmuir, 2013Co-Authors: Hendrik Heinz, Ratan K Mishra, Fateme S EmamiAbstract:The complexity of the molecular recognition and assembly of biotic–abiotic Interfaces on a scale of 1 to 1000 nm can be understood more effectively using simulation tools along with laboratory instrumentation. We discuss the current capabilities and limitations of atomistic Force fields and explain a strategy to obtain dependable parameters for inorganic compounds that has been developed and tested over the past decade. Parameter developments include several silicates, aluminates, metals, oxides, sulfates, and apatites that are summarized in what we call the Interface Force field. The Interface Force field operates as an extension of common harmonic Force fields (PCFF, COMPASS, CHARMM, AMBER, GROMACS, and OPLS-AA) by employing the same functional form and combination rules to enable simulations of inorganic–organic and inorganic–biomolecular Interfaces. The parametrization builds on an in-depth understanding of physical–chemical properties on the atomic scale to assign each parameter, especially atomic ch...
Fateme S Emami - One of the best experts on this subject based on the ideXlab platform.
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Prediction of specific biomolecule adsorption on silica surfaces as a function of pH and particle size
Chemistry of Materials, 2014Co-Authors: Fateme S Emami, Valeria Puddu, Rajiv Berry, Vikas Varshney, Siddharth V. Patwardhan, Carole C. Perry, Hendrik HeinzAbstract:Silica nanostructures are biologically available and find wide applications for drug delivery, catalysts, separation processes, and composites. However, specific adsorption of biomolecules on silica surfaces and control in biomimetic synthesis remain largely unpredictable. In this contribution, the variability and control of peptide adsorption on silica nanoparticle surfaces are explained as a function of pH, particle diameter, and peptide electrostatic charge using molecular dynamics simulations with the CHARMM-Interface Force field. Adsorption free energies and specific binding residues are analyzed in molecular detail, providing experimentally elusive, atomic-level information on the complex dynamics of aqueous electric double layers in contact with biological molecules. Tunable contributions to adsorption are described in the context of specific silica surface chemistry, including ion pairing, hydrogen bonds, hydrophobic interactions, and conformation effects. Remarkable agreement is found for compute...
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thermodynamically consistent Force fields for the assembly of inorganic organic and biological nanostructures the Interface Force field
Langmuir, 2013Co-Authors: Hendrik Heinz, Ratan K Mishra, Fateme S EmamiAbstract:The complexity of the molecular recognition and assembly of biotic–abiotic Interfaces on a scale of 1 to 1000 nm can be understood more effectively using simulation tools along with laboratory instrumentation. We discuss the current capabilities and limitations of atomistic Force fields and explain a strategy to obtain dependable parameters for inorganic compounds that has been developed and tested over the past decade. Parameter developments include several silicates, aluminates, metals, oxides, sulfates, and apatites that are summarized in what we call the Interface Force field. The Interface Force field operates as an extension of common harmonic Force fields (PCFF, COMPASS, CHARMM, AMBER, GROMACS, and OPLS-AA) by employing the same functional form and combination rules to enable simulations of inorganic–organic and inorganic–biomolecular Interfaces. The parametrization builds on an in-depth understanding of physical–chemical properties on the atomic scale to assign each parameter, especially atomic ch...
Massimo Bergamasco - One of the best experts on this subject based on the ideXlab platform.
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Assisting to sketch unskilled people with fixed and interactive virtual templates
Proceedings - IEEE International Conference on Robotics and Automation, 2007Co-Authors: Carlo Alberto Avizzano, Otniel Portillo-rodriguez, Massimo BergamascoAbstract:This work presents a study of performance improvement of unskilled people to drawn simple sketches. We have assisted the unskilled people when drawn using a haptic Interface which acts as a virtual guide taking advantage of its Force feedback capabilities. In the first part of the study, an application has been developed to extract fixed templates from image files; the application extract the principal edges in the images to build output trajectories (templates) that are used by haptic Interface controller, after that, the user can "fill" the virtual templates with the assistance of the Force feedback capabilities of the Interface. Based on the obtained results for fixed templates, a second application was developed; the user can generate interactive templates indicating where he/she desires to put a geometrical template (circle, line or arc) inside the haptic Interface's workplace; once that the position of the template is defined, the Interface shows its position graphically and then user can fill it assisted by the haptic Interface Force feedback.
Arne Sieber - One of the best experts on this subject based on the ideXlab platform.
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A novel haptic platform for real time bilateral biomanipulation with a MEMS sensor for triaxial Force feedback
Sensors and Actuators A-physical, 2008Co-Authors: Arne Sieber, Keith Houston, Clemens Eder, Oliver Tonet, Pietro Valdastri, Arianna Menciassi, Paolo DarioAbstract:Abstract A novel triaxial Force sensing device developed by the authors with a MEMS sensor as core component is mounted on a subnanometric resolution nanomanipulator having three degrees of freedom (DOF). This sensorized device allows measuring Forces on the nanomanipulator tip in the range of 0–3 N for normal and ±50 mN for tangential Forces with a resolution of 11 bits. Together with a haptic input device, a setup was created allowing palpation and Force feeling. The mathematical model used to drive the master haptic Interface Force feedback capabilities is based on online Force and stiffness measurement. The performance of the novel setup is demonstrated with a cell palpation experiment.
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A novel haptic platform for real time bilateral biomanipulation with a MEMS sensor for triaxial Force feedback
Sensors and Actuators A: Physical, 2008Co-Authors: Arne Sieber, Keith Houston, Clemens Eder, Oliver Tonet, Pietro Valdastri, Arianna Menciassi, Paolo DarioAbstract:A novel triaxial Force sensing device developed by the authors with a MEMS sensor as core component is mounted on a subnanometric resolution nanomanipulator having three degrees of freedom (DOF). This sensorized device allows measuring Forces on the nanomanipulator tip in the range of 0-3 N for normal and ±50 mN for tangential Forces with a resolution of 11 bits. Together with a haptic input device, a setup was created allowing palpation and Force feeling. The mathematical model used to drive the master haptic Interface Force feedback capabilities is based on online Force and stiffness measurement. The performance of the novel setup is demonstrated with a cell palpation experiment. © 2007 Elsevier B.V. All rights reserved.
