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Triscone Gilles

Professeur HES ordinaire

Hauptkompetenzen

Professeur HES ordinaire

Telefon-Nummer: +41 22 558 57 45

Büro: DI

Haute école du paysage, d'ingénierie et d'architecture de Genève
Rue de la Prairie 4, 1202 Genève, CH

Bereich
Technique et IT

Hauptstudiengang
Microtechniques

Professeur HES ordinaire

Telefon-Nummer: +41 22 558 57 45

Haute école de santé - Genève
Avenue de Champel 47, 1206 Genève, CH

Bereich
Santé

Hauptstudiengang
Technique en radiologie médicale

BSc HES-SO en Microtechniques - Haute école du paysage, d'ingénierie et d'architecture de Genève

Radioprotection opérationnelle
Nucléaire appliqué

BA HES-SO en Architecture - Haute école du paysage, d'ingénierie et d'architecture de Genève

Le radon dans les habitations

2016

Computational fluid dynamics as a tool to predict the air pollution dispersion in a neighborhood :

Scientifique ArODES

a research project to improve the quality of life in cities

Triscone Gilles, Abdennadher Nabil, Balistreri Christophe, Donzé Olivier, Greco D., Haas Patrick, Haas-Pekoz H., Mohamed-Nour T., Munier Pierre, Pontelandolfo Piero, Putzu Roberto, Richard Jacques, Sthioul H., Delley Nicolas, Choffat D., Niederhäuser Elena-Lavinia, Schaer Roger, Müller Henning, Decaix Jean, Richard Sylvain, Münch-Alligné Cécile, Kunz P., Despot F.

International Journal of Sustainable Development and Planning, 2016, vol. 11, no. 4, pp. 546-557

Link zur Publikation

Zusammenfassung:

In large cities, pollution composed of many different chemical components and small particles is an important public health problem that affects especially children and people presenting breathing difficulties. One challenge for public authorities is to respect the norms given by the central state, but how? Today, concrete methods for reducing pollution are perceived by the majority of citizens as constraints. However, the authorities have the possibility of modifying the wind’s action by imposing architectural constraints, such as building emplacement and roof structure. This is the main objective of the Geneva ‘Clean City’ project financed by the University of Applied Sciences Western Switzerland. ‘Clean City’ focuses its research on one of Geneva’s polluted neighborhood called Pâquis, which is situated directly on the Geneva lake front. The project attempts to understand the dispersion of pollution from an experimental and a numerical point of view. After validation of the technique for a simple case, we compare environmental measurements on a 1/500 3D scale model of the Pâquis installed in an instrumented wind tunnel with Computational Fluid Dynamics (CFD) simulation obtained with the help of cloud computing.

2012

A new measurement of the half-life of 166mHo

Scientifique ArODES

Nedjadi Youcef, Bailat Claude, Caffari Y., Froidevaux Pascal, Wastiel Claude, Kivel Niko, Guenther-Leopold Ines, Triscone Gilles, Jaquenod Frédéric, Bochud François

Applied Radiation and Isotopes, 2012, vol. 70, pp. 1990-1996

Link zur Publikation

Zusammenfassung:

The work presented here is a new and precise measurement of the half-life of 166mHo by determining the activity concentration, using an ionisation chamber calibrated for this nuclide, and measuring the number of 166mHo atoms using multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS). Since the isotope 166Er interferes with the mass spectrometric measurement, Er has to be eliminated from the 166mHo radioactive solution. The elimination was achieved using ion-exchange chromatography with the cation exchange resin Dowex AG 50W-X8 and 2-Hydroxybutanoic acid as the mobile phase. After a first transit through the chromatographic column, the purified 166mHo eluate was spiked with natural Er to get a resulting Er isotopic composition close to that of natural Er at better than 99.5%, and then it underwent two further separations to eliminate the Er. The activity concentration of this Er-free radioactive 166mHo solution was measured in our reference ionisation chamber calibrated for this nuclide by means of the 4πβ(PC)-γ and 4πβ(PS)-4πγ coincidence techniques and integral counting with a well-type NaI(Tl) detector and Monte Carlo efficiencies. An aliquot of this standardized solution was sent to the Paul Scherrer Institute (PSI) for mass concentration determination using an isotope dilution MC-ICP-MS approach. The mass concentration of 166mHo in this solution was determined with 0.25% relative standard uncertainty. This value was corroborated by two other independent measurements. The new half-life of 166mHo, 1132.6(39) years (k=1), is compatible with the value determined in 1965, but is 5.6% shorter and about 43 times more precise.

2007

Strain relaxation and critical temperature in epitaxial ferroelectric Pb(Zr0.20Ti0.80)O3 thin films

Scientifique ArODES

Gariglio Stefano, Stucki N., Triscone Jean-Marc, Triscone Gilles

Applied Physics Letters, 2007, vol. 90, article no. 202905

Link zur Publikation

Zusammenfassung:

Strain relaxation and the ferroelectric critical temperature were investigated in a series of epitaxial Pb(Zr0.20Ti0.80)O-3 thin films of different thicknesses grown on metallic 0.5% Nb-doped SrTiO3 substrates. Detailed x-ray diffraction studies reveal that strain relaxation progressively occurs via misfit dislocations as the film thickness is increased from fully coherent films (for films below 150 A) to essentially relaxed films (for thicknesses above typically 800 A). It is found that this change in the strain state does not modify the ferroelectric critical temperature which is found for all the samples to be around 680 degrees C, a value much higher than the bulk.

Primary activity measurements with 4p? NaI(Tl) counting and Monte Carlo calculated efficiencies

Scientifique ArODES

Nedjadi Youcef, Spring Philippe, Bailat Claude, Decombaz Marc, Triscone Gilles, Gostely Jean-Jacques, Laedermann Jean-Pascal, Bochud François O.

Applied Radiation and Isotopes, 2007, vol. 65, no. 5, pp. 534-538

Link zur Publikation

Zusammenfassung:

The radioactive concentrations of 18F, 88Y and 152Eu solutions and the activity of 222Rn gas ampoules are measured using a primary method involving 4πγ NaI(Tl) integral counting with a well-type NaI(Tl) detector and efficiencies computed by Monte Carlo simulations. The simulations use the GEANT code coupled with a routine (sch2for), which generates randomly the decay paths and emissions depending on the decay scheme parameters. The resulting radioactive concentrations of 88Y, 152Eu and 18F are found to agree with those measured with other primary measurement methods, such as 4π (β, e, X)-γ coincidence counting or liquid scintillation counting. Results of the determination of the activity of 222Rn gas ampoules by this method also match the results of an absolute standardisation technique in which radon is condensed onto a cold surface and its α-emissions are detected through an accurately specified solid angle.

2014

Computational fluid dynamics as a tool to predict the air pollution dispersio in a neighborhood :

Conference ArODES

a research project to improve the quality of life in cities

Piero Pontelandolfo, Cécile Münch-Alligné, Jean Decaix, Roger Schaer, Henning Müller, Patrick Haas, Hervé Sthioul, Nabil Abdennadher, Gilles Triscone, Roberto Putzu, Elena-Lavinia Niederhäuser, Christophe Balistreri, David Choffat, Fabienne Despot

Proceedings of Smart city expo world congress 2014

Link zur Konferenz

Zusammenfassung:

In large cities, pollution composed of many different chemical components and small particles is an important public health problem that affects especially children and people presenting breathing difficulties. One challenge for public authorities is to respect the norms given by the central state, but how? Today, concrete methods for reducing pollution are perceived by the majority of citizens as constraints. However, the authorities have the possibility of modifying the wind's action by imposing architectural constraints, such as building emplacement and roof structure. This is the main objective of the Geneva "Clean City" project financed by the University of Applied Sciences Western Switzerland. "Clean City" focuses its research on one of Geneva?s polluted neighborhoods called P�quis which is situated directly on the Geneva lake front. The project attempts to understand the dispersion of pollution from an experimental and a numerical point of view. After validation of the technique for a simple case, we compare environmental measurements on a 1/500 3D scale model of the P�quis installed in an instrumented wind tunnel with Computational Fluid Dynamics (CFD) simulation obtained with the help of cloud computing. In Barcelona, we will show the first experimental measurements and simulated ?Clean City? results.

Errungenschaften

Suche

Triscone Gilles

Professeur HES ordinaire

Hauptkompetenzen

Metrology

Protection again radiation

Radon

Nuclear physics

Radiation simulation

Material sciences

Superconductivity

Professeur HES ordinaire

Professeur HES ordinaire