Recherche

Afficher tous les résultats pour

Accueil

Personne

Peter Ryser

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (68)

Instrumented Prosthesis for Knee Implants Monitoring

Steve Tanner, Kamiar Aminian, Philippe Renaud, Catherine Dehollain, Arnaud Bertsch, Peter Ryser, Eric Meurville, Hooman Dejnabadi, Pierre-André Farine, Oguz Atasoy, Brigitte Jolles-Haeberli, Arash Arami, Willyan Hasenkamp Carreira, Shafqat Ali, Matteo Simoncini

In this work we present an instrumented smart knee prosthesis for in-vivo measurement of forces and kinematics. Studying the constraints, we designed minimal sensory systems to be placed in the polyethylene part of the prosthesis. The magnetic sensors and ...

IEEE2011

Integrated SMD pressure/flow/temperature multisensor for compressed air in LTCC technology: Thermal flow and temperature sensing

Thomas Maeder, Peter Ryser, Yannick Sébastien Fournier, Jean-Bastien Coma, Nicolas Craquelin

In this work, we present and analyse the flow-sensing part of a recently-developed multisensor in LTCC (low- temperature co-fired ceramic) technology; this device integrates flow / pressure / temperature sensing and is designed for diagnostics monitoring o ...

Elsevier2011

Low-firing thick-film piezoresistive sensors for medical instruments

Thomas Maeder, Peter Ryser, Caroline Jacq

In this work, a low-firing thick-film materials system allowing fabrication of piezoresistive sensors on surgical alloys is presented in detail, with application to a force-sensing surgical instrument. The system comprises a series of individual thick-film ...

Elsevier2011

Fabrication of Polymer-Based Micro Devices: Formulation and Study of the Paste

Thomas Maeder, Peter Ryser, Nathalie Sophie Adeline Serra, Olivier Gentsch

We investigate in the present work the fabrication of polymer-based micro-fluidic and micro-mechanical devices using sacrificial, resistive/conductive pastes, through a screen-printing process. An organic sacrificial paste is first screen-printed onto a su ...

Elsevier2011

A viscosity-dependent affinity sensor for continuous monitoring of glucose in biological fluids

Jean-Michel Sallese, Peter Ryser, Eric Meurville, Christophe Boss

We present a viscometric affinity biosensor for continuous monitoring of glucose in biological fluids such as blood and plasma. The sensing principle of this chemico-mechanical sensor is based upon the viscosity variation of a sensitive fluid with glucose ...

Elsevier2011

MULTI-ANALYTE DETECTION FOR BIOLOGICAL FLUIDS Towards Continous Monitoring of Glucose, Ionized Calcium and pH using a Viscometric Affinity Biosensor

Peter Ryser, Eric Meurville, Christophe Boss, Pablo Dosil Rosende, Frédéric Schmitt

We present a viscometric affinity biosensor that can potentially allow continuous multi-analyte monitoring in biological fluids like blood or plasma. The sensing principle is based on the detection of viscosity changes of a polymeric solution which has a s ...

SciTePress2011

Transport properties of nonhomogeneous segregated composites

Gianluca Ambrosetti, Thomas Maeder, Peter Ryser, Claudio Grimaldi, Biagio Nigro

In conductor-insulator composites in which the conducting particles are dispersed in an insulating continuous matrix the electrical connectedness is established by interparticle quantum tunneling. A recent formulation of the transport problem in these kind ...

2011

Structuration of the low temperature co-fired ceramics (LTCC) using novel sacrificial graphite paste with PVA–propylene glycol–glycerol–water vehicle

Thomas Maeder, Peter Ryser, Caroline Jacq

A novel formulation for thick-film graphite sacrificial pastes is studied in this paper. It is composed of coarse graphite powder (grain size: 25 μm), dispersed in a vehicle consisting of polyvinyl alcohol (PVA) dissolved in a propylene glycol (PG)–glycero ...

Elsevier2011

Formulation of composite resistive pastes for fabrication of micro-heaters

Thomas Maeder, Peter Ryser, Pierre Lemaire, Nathalie Sophie Adeline Serra

We investigate in this work the formulation of composite resistive pastes based on epoxy resins and graphite for micro-heater manufacturing via thick-film technology. These resistive pastes are designed for screen-printing onto a printed circuit board (PCB ...

Elsevier2010

Automated characterization of dextran/concanavalin A mixtures-A study of sensitivity and temperature dependence at low viscosity as basis for an implantable glucose sensor

Peter Ryser, Eric Meurville

Mixtures of aqueous solutions of dextran and concanavalin A have a potential use as glucose sensing substances. We investigate these mixtures at low viscosities which are especially advantageous for miniature mechanical glucose sensing devices. The glucose ...

Elsevier2010

Solution of the tunneling-percolation problem in the nanocomposite regime

Gianluca Ambrosetti, Thomas Maeder, Peter Ryser, Claudio Grimaldi

We noted that the tunneling-percolation framework is quite well understood at the extreme cases of percolation-like and hopping-like behaviors but that the intermediate regime has not been previously discussed, in spite of its relevance to the intensively ...

2010

Novel chemico-mechanical approach towards long-term implantable glucose sensing

Jean-Michel Sallese, Peter Ryser, Eric Meurville, Christophe Boss

The proof of concept of a continuously sensing affinity device based on the glucose-dependent viscosity of a sensitive solution containing dextran and Concanavalin A has been successfully demonstrated. The biosensor incorporates a piezoelectric diaphragm a ...

Elsevier2009

Sensors and packages based on LTCC and thick-film technology for severe conditions

Thomas Maeder, Peter Ryser, Caroline Jacq

Reliable operation in harsh environments such as high temperatures, high pressures, aggressive media and space, poses special requirements for sensors and packages, which usually cannot be met using polymer-based technologies. Ceramic technologies, especia ...

2009

Hermetic package for optical MEMS

Thomas Maeder, Jacques Jacot, Peter Ryser, Frank Seigneur, Yannick Sébastien Fournier

This article describes the design and fabrication of a hermetic LTCC package for an optical MEMS chip designed for space applications. The package must ensure electrical and optical connections, mechanical positioning, atmosphere control, and finally low t ...

2009

Optimal percolation of disordered segregated composites

Thomas Maeder, Peter Ryser, Claudio Grimaldi, Niklaus Johner

We evaluate the percolation threshold values for a realistic model of continuum segregated systems, where random spherical inclusions forbid the percolating objects, modellized by hard-core spherical particles surrounded by penetrable shells, to occupy lar ...

2009

Size-Selective Diffusion in Nanoporous but Flexible Membranes for Glucose Sensors

Peter Ryser, Antoine Barraud, Eric Meurville, Nao Takano

A series of nanoporous membranes prepared from polyethylene-block-polystyrene were applied for size-selective diffusion of glucose and albumin molecules. Millimeter-sized test cells for characterization of such molecular diffusions were designed assuming a ...

American Chemical Society2009

Load sensing surgical instruments

Thomas Maeder, Peter Ryser, Caroline Jacq

Force and pressure sensing technology applied to smart surgical instruments as well as implants allow to give a direct feedback of loads to the surgeon lead to better reliability and success of surgical operations. A common technology used for sensors is l ...

Springer Verlag2009

Electron tunneling in conductor-insulator composites with spherical fillers

Gianluca Ambrosetti, Thomas Maeder, Peter Ryser, Claudio Grimaldi, Niklaus Johner

We report on our Monte Carlo calculations of the conductivity of monosized and conducting spherical particles dispersed in a homogeneous matrix, with interparticle transport mechanism given by electron tunneling. We show that our numerical results can be r ...

2009

Optimisation of a Thick-Film 10...400 N Force Sensor

Thomas Maeder, Peter Ryser, Giancarlo Corradini, Niklaus Johner, Gregory Affolter

The ring-on-ring bending principle allows the fabrication of simple, low-cost thick-film piezoresistive sensors for compressive forces in the 10 to 400 N range. However some imperfections are encountered in its basic embodiment, such as relatively high for ...

Elsevier2008

Percolative properties of hard oblate ellipsoids of revolution with a soft shell

Gianluca Ambrosetti, Peter Ryser, Claudio Grimaldi, Niklaus Johner

We present an in-depth analysis of the geometrical percolation behavior in the continuum of random assemblies of hard oblate ellipsoids of revolution. Simulations were carried out by considering a broad range of aspect-ratios, from spheres up to aspect-rat ...

2008

Page 2 sur 4