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Energies renouvelables et rentabilité - Ecole d'été internationale sur les énergies renouvelables
2018
Naef Olivier, Carpanzano Emanuele, Gambardella Luca Maria
2018, Lugano, Switzerland : 18-19 October 2018, 69 p.
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2013
Pauline Sanglard, Olivier Vorlet, Roger Marti, Olivier Naef
CHIMIA, 2013 , vol. 67, no 10, pp. 711-718
2010
Naef Olivier, Roch Mathieu, Chappuis Thierry
CHIMIA International Journal for Chemistry, 2010, vol. 64, no. 12, pp. 889-891
Résumé:
This article discusses the screening of chemical reactions using a microreactor equipped with infrared spectroscopy as online analytics. An esterification reaction has been optimized in continuous mode with the proposed setup. The esterification did not work well due to the material of the microreactor (stainless-steel 316Ti) that catalyzed the decomposition of formic acid. However, despite the occurrence of decomposition, an optimization could be achieved with this system.
Moser Regula, Chappuis Thierry, Vanoli Ennio, Crelier Simon, Naef Olivier
CHIMIA International Journal for Chemistry, 2010, vol. 64, no. 11, pp. 799-802
A micro-reactor coupled to a microfluidic system and an online UV/VIS spectrometer is described. The enzymatic reaction studied is the hydrolysis of the N-benzoyl-L-tyrosine ethyl ester (BTEE) to N-benzoyl-L-tyrosine (BT) and ethanol, catalyzed by chymotrypsin. The production is online monitored with UV spectroscopy at 256 nm. Three different immobilization methods of the enzyme are discussed: Eupergit® C, controlled-pore glass (CPG), and Sepharose.
Ecker Achim, Frey Urban, Gygax Daniel, Naef Olivier
CHIMIA International Journal for Chemistry, 2010, vol. 64, no. 7/8, pp. 617-620
Offrir les qualifications professionnelles requises et garantir un enseignement axé sur la pratique sont les principales caractéristiques de la formation de Bachelor of Science proposée dans les quatre hautes écoles spécialisées de Suisse. La formation de chimiste présente des orientations qui varient d’une haute école à l’autre et est intégrée différemment dans l’offre de cours. La transmission de connaissances théoriques et pratiques solides garantissant aux étudiants les qualifications professionnelles nécessaires sur le marché du travail constitue le point commun des quatre filières. La facilité avec laquelle ceux-ci trouvent un emploi prouve que les compétences acquises dans les hautes écoles spécialisées sont utiles à l’industrie.
2009
Naef Olivier, Fabre Sébastien
Alimenta, 2009, no. 11, pp. 26-27
Perritaz Damien, Salzmann Christophe, Gillet Denis, Naef Olivier, Bapst Jacques, Barras Frédéric, Mugellini Elena, Abou Khaled Omar
Lecture Notes in Computer Science, 2009, vol. 5440, pp. 280-310
Augmented Reality enhances user perception by overlaying real world information with virtual computer-generated information. The aims of the 6th Sense project are to improve real-time interaction between the real environment and the virtual world and to maximize the user experience in mobile Augmented Reality. To achieve these objectives a generic framework constituted of two main layers is proposed. The End-to-End Adaptation Layer adapts in real-time the parameters of the Augmented Reality system to provide the user with the best possible experience despite the varying operating conditions such as the transmission link and user head motion. The Generic Augmented Reality Layer encompasses solutions to the problem of overlaying adequate information in the real scene and manages multimodal interaction with the virtual environment.
2007
Naef Olivier
CHIMIA International Journal for Chemistry, 2007, vol. 61, no. 10, pp. 672-674
Microreactors are discussed as a complementary tool for chemical development. Two reactions were studied: the formation of an ionic liquid, the 3-butyl-1-methylimidazolium bromide is presented, and the synthesis of cinnamaldehyde.
Corminboeuf Grégory, Amrhein Michael, Naef Olivier
Chemometrics and Intelligent Laboratory Systems, 2007, vol. 86, no. 2, pp. 168-178
A classification methodology for the automatic detection of start- and endpoints of chemical and biotechnological reaction systems from spectral reaction data is proposed. In the calibration phase, several batch experiments must be conducted covering the expected operational variability (e.g., initial concentrations, dosage amount and time). The start/endpoint of the reaction of interest (e.g. start of a side reaction, stop of the main reaction) is determined by using Evolving Factor Analysis (EFA) and cross-checked with common process variables (temperature, mass, heat flow) or chromatographic measurements if available. A Partial Least-Squares Discriminant Analysis (PLS-DA) model is built on the calibration batches and then used for on-line detection of the start/stop of the reaction of interest based on spectral data from a new batch. The methodology is illustrated for (i) simulated spectra of a fed-batch reactor exhibiting two consecutive reactions with a limiting initial reactant for the first reaction, and (ii) measured infrared spectra of an aldol reaction exhibiting a side reaction. A PLS-DA model is built to on-line detect the stop of the main reaction. The effect of data pre-treatment methods and the choice of the number of latent variables on various classification performance indices (efficiency, false positive rate and false negative rate) are evaluated. For the simulated data, the best model is obtained with four latent variables and mean-centered data. The classification efficiency for a validation set of five experiments is 99.0% and the delay for the endpoint detection is about 1 min which corresponds to the sampling time. For the measured data, the best model is obtained with five latent variables and pre-treatment using standard normal variate. The classification efficiency for a validation set of two experiments is 95.9% and the delay for the endpoint detection is about 8 min for typical batch duration of 250 min.
2006
Naef Olivier, Crausaz Philippe
International Journal of Online and Biomedical Engineering (iJOE), 2006, vol. 2, no. 4
This project aims at the realization of a wearable supervision system for chemical installations based on the augmented reality paradigm. Augmented reality improves the perception the operator has of his surrounding environment by overlaying real-time computer-generated images onto the real world. This document describes the work realized from the beginning of this year. The first step was to implement a simplified version of the system to show that such a system is feasible and usable for the supervision of chemical plants. This was done in the prototype α1, which was released in April 2004. Based on knowledge acquired during the design and the implementation of the first simplified prototype called α1, a complete and better version of the system, the prototype α2, is currently being developed.
International Journal of Online and Biomedical Engineering (iJOE), 2006, vol. 2, no. 3
This paper presents an analytical chemistry experiment using a headspace gas-chromatograph (GC). The same experiment is first realized in a classical way (the student must come to the lab), then in virtual mode (all the experiment is simulated), and finally in remote control mode (the student is able to control the experiment from a remote computer). Choosing the appropriate mode not only requires analyzing the financial and technological aspects, but also the knowledge and competences acquired by the student during the lab session. Requirements, technologies, and results are discussed for each mode.
2004
Virtuelle Instrumente in der Praxis (Begleitband zum Kongress VIP 2004) (8 p.). 2004, Heidelberg : Ed. Hüthig
2003
Dans Jamal, Rahman, Virtuelle Instrumente in der Praxis : Messtechnik, Automatisierung (Begleitband zum Kongress VIP 2003). (8 p.). 2003, Heidelberg : Ed. Hüthig
2000
Chimia International Journal for Chemistry, 2000, vol. 54, no. 6, pp. 370-372
This article aims to show that computational chemistry is not exclusively restricted to molecular energy and structure calculations but also includes chemical process control and reaction simulation. By having fun with LEGO and a fundamental knowledge of LabVIEW, it is shown how a novice can be introduced to this exciting and challenging field of chemistry.
Dans Jamal, Rahman, Virtuelle Instrumente in der Praxis : Automation (Begleitband zum Kongress VIP 2000). (13 p.). 2000, Berlin : VDE Verlag
1998
CHIMIA International Journal for Chemistry, 1998, vol. 52, no. 12, pp. 740-742
Réalisations
Eastes Richard-Emmanuel, Naef Olivier, Tellenbach Marianne
2018 ; Culture scientifique et technique pour les jeunes
La semaine de défis scientifiques et techniques Yakaton s'est déroulée du 2 au 6 juillet 2018.
Plus d'une centaine de jeunes de 12 à 15 ans ont travaillé sur des projets sur le thème « Equilibres-Déséquilibres ». L'événement a eu lieu simultanément dans plusieurs hautes écoles du domaine Ingénierie et Architecture de la HES-SO. La mise en commun des défis s'est déroulée vendredi 6 juillet à Renens.
Par groupes de quatre, les jeunes ont réalisé un mécanisme qui apporte une réponse originale à leur défi. Ils étaient encadrés par les étudiantes et étudiants, sous la supervision d’une professeure ou d’un professeur. Les équipes publiaient leurs expérience en ligne sur www.yakaton.ch.
Le dernier jour, les équipes ont assemblé leur mécanisme sur des palettes reliées entre elles pour former une réaction en chaîne.
Plusieurs équipes ont été récompensées lors de la cérémonie de clôture de Yakaton le vendredi 6 juillet 2018 à Renens.
News de la HES-SO sur le sujet : https://www.hes-so.ch/fr/premier-yakaton-exception-12117.html
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