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Rozsnyo Roland

Maître d'enseignement HES

Hauptkompetenzen

Comsol Multiphysics

Hauptvertrag

Maître d'enseignement HES

Büro: B128

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

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2018

Smart wire EDM machine

Wissenschaftlicher Artikel ArODES

Georg Wälder, Damien Fulliquet, Noria Foukia, Frédéric Jaquenod, Michel Lauria, Roland Rozsnyo, B. Lavazais, R. Perez

Procedia CIRP, 2018, 68, pp. 109-114

Link zur Publikation

Zusammenfassung:

Wire EDM is a time consuming process which requires several, (cost significant), consumables like wire, filters or deionization resin. Based on machining history and sensor inputs a developed model, e.g. an intelligent software, allows to predict the status & future capacity of consumables and wear parts and thus avoid down-times of machine. The use of a predictive model for estimation of the lifetime of consumable and wear parts will be a significant step in the automation of (wire EDM) machines.

2015

Saisir les mathématiques des montres

Professioneller Artikel ArODES

Alexandre Caboussat, Roland Rozsnyo

Europa Star Première : le journal de l'écosystème horloger suisse, 2015, vol. 17, no 5 (30 septembre), pp. 20-21

Link zur Publikation

Zusammenfassung:

Au-delà de la seule mécanique horlogère, les modélisations mathématiques permettent de reproduire et maîtriser toujours davantage des phénomènes tels la dilatation, les frottements, la polarisation ou encore l’acoustique des montres.

2023

Simulation of an under lake infrastructure for capture and storage of solar energy (ULISSE)

Konferenz ArODES

Roland Rozsnyo, William van Sprolant, Daniel Bello-Mendes

COMSOL Conference 2023 Munich

Link zur Konferenz

Zusammenfassung:

In this paper we present a Comsol Multiphysics simulation model of a reduced size ULISSE mock-up. The mock-up is immersed in a container, playing the role of the lake. Both are filled with water at the room temperature. Then starts a cycle imitating the change of seasons. Hot water at 33.5 0 °C is injected by a pump in the ULISSE mock-up chasing the initial water. After a period of rest, the water is pumped back. The recovered energy is calculated. Real-time measurements are made by temperature sensors and water flow sensors allowing comparisons with the simulation results.

2020

Mixed-mode S parameters modeling with COMSOL multiphysics

Konferenz ArODES

Sophie de Préville, Hervé Eusèbe, Thierry Goldhorn, Roland Rozsnyo

Proceedings of COMSOL conference, 14-15 October 2020, Grenoble, France

Link zur Konferenz

Zusammenfassung:

This paper analyses the mixed-mode S parameters in electrical connectors used for data transmission through the standards used in communication protocols. The first part introduces the type of connectors used and the goals of the study. The second part is a theoretical part explaining what S parameters are. The third and fourth parts are the modeling of electromagnetic waves with COMSOL Multiphysics in the said connectors. Some results are presented in the fifth part: return loss (RL) and transverse conversion transfer loss (TCTL). The last part is dedicated to the presentation of the COMSOL application developed to improve the process conception of electrical connectors.

2018

COMSOL® application builder lets end-users harness the power of numerical modeling and simulation

Konferenz ArODES

John Speyrer, Aurélien Maurer, David Enfrun, Roland Rozsnyo

Proceedings of COMSOL Conference, 14 October 2018, Lausanne Switzerland

Link zur Konferenz

Zusammenfassung:

Non-destructive direct measurements of mechanical properties of biological tissue, such as that of the crystalline lens of the eye are difficult to obtain. More often indirect measurement methods are used, which then require post processing of the data to extract meaningful results which can be translated into material properties, such as the shear modulus of elasticity of the crystalline lens. This paper will present how COMSOL® can be used as a tool for the processing step of deducing the shear modulus of the crystalline lens. Moreover, we will discuss the use of the COMSOL® Optimization module to reverse engineer the material property; as well as the use of COMSOL’s® Application Builder to create a Graphical User Interface (GUI) which enables non-simulation experts to use the simulation model.

2017

Biologic tissues properties deduction using an opto-mechanical model of the human eye

Konferenz ArODES

Aurélien V. Maurer, David Paul Enfrun, Charles-Olivier Zuber, Roland Rozsnyo

Proceedings of COMSOL conference 2017, 18-20 October 2017, Rotterdam, The Netherlands

Link zur Konferenz

Zusammenfassung:

The visual accommodation is a complex biomechanical & optical process. Today in vivo imaging technologies do not allow to measure the eye components material propertiessuch asthe refractive index or the stiffness: these properties are essential to understand & diagnose the effect of aging on the eye accommodative performance and develop new surgeries. To address this problem, Kejako has set up a parametric 3D mechanical model of the human eye, in addition with an optical evaluation. This paper present how this model can be used to deduce with reverse engineering some of these non-measurable properties from in vivo imaging such as the refractive index distribution in the Crystalline Lens. Furthermore, we will open the discussion on some potential application of this model for Presbyopia or other eye disorders.

Errungenschaften

PEOPLE@HES-SO Verzeichnis der Mitarbeitenden und Kompetenzen

Rozsnyo Roland

Maître d'enseignement HES

Hauptkompetenzen

Comsol Multiphysics

Maître d'enseignement HES

PEOPLE@HES-SO
Verzeichnis der Mitarbeitenden und Kompetenzen