Romdhana H.,Agro ParisTech |
Bonazzi C.,French National Institute for Agricultural Research |
Drying Technology | Year: 2016
The idea of taking into account environmental impact criteria in the process design becomes a necessity for both the industry and governments, due to increased binding regulations. Moreover, to address the issue of integrating sustainable processes, environmental impact must be weighed and balanced against other concerns, such as economic performance, product quality, and long-term sustainability. Therefore, this study introduces a methodology for environmental impact minimization and optimization of multiple conflicting criteria. A general eco-design method for biomass drying process is proposed. The main target is to develop an assessment computer-aided process engineering tool that compares environmental impacts of different operating conditions and fuel types to support decision-makers for an improved compliance to environmental criterion and sustainability. © 2016, Copyright © Taylor & Francis Group, LLC.
Hernandez Sanchez M.D.R.,Agro ParisTech |
Cuvelier M.-E.,French National Institute for Agricultural Research |
Journal of Food Engineering | Year: 2015
The formulation and structure of initial liquid emulsion have an impact on the efficiency of encapsulation (encapsulated oil quantity) in spray dried particles (dried emulsions) and must be adapted to spray drying. Two different protocols were tested varying the concentration of emulsifier (Tween® 20), conditions of homogenization and concentration of wall material (Maltodextrin and Agave Inulin). The concentration of emulsifier and wall material should allow avoiding micelle formation or coalescence. Results show that it was possible to produce stable emulsions with an oil droplet size around 2. μm containing 40% w/w of total dry matter (g/100. g emulsion) using maltodextrin as wall material and 3.5% Tween® 20 (3.5. g/100. g oil) or using Agave Inulin in emulsions with a total dry mater content of 50% w/w (50. g/100. g emulsion) with a minimal concentration of emulsifier (1.17. g/100. g oil). The spray drying of these emulsions produced fine powders (<22. μm) with a monodispersed size distribution and good oil encapsulation efficiency (>88%). © 2015.
Amandolese X.,CNAM |
Vartanian C.,GIE S2A Aerospace acoustics Wind Tunnel Complex
Journal of Wind Engineering and Industrial Aerodynamics | Year: 2010
3/4 open jet wind tunnels are subjected to undesired low frequency pressure and velocity fluctuations at distinct flow velocities. The aim of this paper is to present recent research done in the full scale automotive aero-acoustic facility of the S2A wind tunnel complex in order to characterise the physical mechanism causing the fluctuations, to clarify their impact on the aerodynamic measurements and to validate solutions that allow high quality aerodynamic and acoustic measurements over the entire velocity range of the wind tunnel. Four areas of significant oscillations have been detected in the full scale S2A wind tunnel for wind velocities between 10 and 60. m/s. Those fluctuations are due to successive lock-ins of the wind speed dependent shear layer instability of the jet, with acoustic resonant frequencies of the wind tunnel. Various solutions have been tested in order to assess their impact on the fluctuations and on the quality of the aerodynamic measurements. A less protruding solution than classical vortex generator has been validated. It is made of two rectangular flaps along the upper edge of the nozzle exit, with a small plunging angle. © 2010 Elsevier Ltd.
Joseph P.,Institute AeroTechnique IAT |
Amandolese X.,CNAM |
Edouard C.,FLOWDIT |
Aider J.-L.,ESPCI ParisTech
Experiments in Fluids | Year: 2013
This work focuses on an experimental investigation of flow control of the wake of a 3D bluff body using micro-electro mechanical system (MEMS) pulsed microjets. Results show that a significant drag reduction (up to 10 %) is obtained with micro-jets located upstream the recirculation bubble created over the rear slant of the model. The energy balance obtained with MEMS is also much better than the one obtained with conventional magnetic valves, which makes MEMS technology highly attractive for future industrial applications on flow control. © Springer-Verlag Berlin Heidelberg 2012.
News Article | November 2, 2016
Les Conseils d'administration d'Air France-KLM et d'Air France, réunis ce jour, ont décidé de faire évoluer la gouvernance du Groupe, afin d'accompagner la mise en oeuvre du projet Trust Together et de resserrer la chaîne de décisions. « J'ai toute confiance dans les qualités de Franck Terner pour accélérer la transformation et la croissance d'Air France, et mobiliser toutes les énergies de la Compagnie autour du succès du projet Trust Together. Franck Terner a fait toute sa carrière dans le Groupe, qu'il connait parfaitement. Il saura entraîner les salariés d'Air France. Il a la culture du résultat et l'expérience du dialogue social, ce qui lui donne tous les atouts pour réussir dans sa mission au service de la croissance d'Air France et du retour de la confiance » a déclaré Jean-Marc Janaillac. Né le 12 avril 1960, Franck Terner est Ingénieur, diplômé de l'École Nationale Supérieure Electronique et Application (ENSEA), du Conservatoire national des Arts et Métiers (CNAM) et de l'Institut d'Administration des Entreprises (IAE) de Paris.
News Article | November 15, 2016
Telnyx, a leading provider of wholesale VoIP services, announced today its Skype for Business certification as a SIP trunk provider. Through the certification, Telnyx is now a recognized enterprise VoIP carrier by Microsoft, making it one of fewer than 80 carriers who have passed Microsoft’s rigorous testing. Skype for Business offers organizations enterprise-level security, Cloud PBX with PSTN Calling, and PSTN Conferencing. Its certification is one of the most stringent VoIP certificates available, and participants must meet Microsoft’s quality, reliability, feature-set and security standards. Telnyx’s SIP trunking services, via its Mission Control Self-Service Portal and API, allows enterprises to connect their on-premise Skype for Business infrastructure to an external PSTN network in a highly scalable way, offering the highest quality PSTN interconnectivity possible via the Internet. Telnyx has built a global private network that changes the flow of communications, and Skype for Business offers Telnyx the ability to offer its services to a new segment of the market, the enterprise. “Our ability to achieve this certification using our proprietary platform rather than off-the-shelf hardware proves that Telnyx is converging the telecom service provider and telecom equipment manufacturer models in a way that will enable new and unique modes of communication available to the enterprise,” said Ian Reither, COO at Telnyx. “This is an opportunity to continue to bring leadership and innovation to this industry.” The SIP trunk service provider interoperability program qualifies providers that are connecting enterprise, on-premise Skype for Business voice networks to a service provider offering PSTN origination, termination and emergency services through SIP protocol. “Being recognized as a Skype for Business certified carrier for secure enterprise VoIP demonstrates our commitment to delivering the best in real-time communications,” said Reither. “It’s an important step as we continue to service customers globally.” For more information about Telnyx, please visit https://telnyx.com/. You can also read more about Microsoft’s SIP trunking services and certifications at https://technet.microsoft.com/en-us/dn947484. Founded in 2009, Telnyx is a wholesale VoIP provider that enables its customers to connect with the more than 8 billion devices on the Global Public Switched Telephone Network. Telnyx enables its customers to “Be Their Own Carrier®” through its innovative portal and RESTful API. Telnyx’s SIP trunking offering allows customers to buy their telecommunications services a la carte, and to scale services up and down on demand, so that they pay only for what they use. Telnyx offers a feature set that is at full feature parity with a traditional offering, providing not only termination and toll-free and geographic DIDs, but also CNAM, emergency services, and more.
News Article | November 2, 2016
The Air France-KLM and Air France Boards of Directors met today and decided to change the Group's governance, to support the implementation of the Trust Together project and to enhance the decision-making process. The functions of Chairman and CEO of Air France are now separate, and Jean-Marc Janaillac, Chairman of Air France-KLM has also been appointed Chairman of Air France. Franck Terner, the current Executive Vice-President Engineering and Maintenance at Air France-KLM, has been appointed CEO of Air France. Frédéric Gagey has been appointed Chief Financial Officer of the Air France-KLM group, replacing Pierre-François Riolacci, who announced his intention to leave a few months ago. "I have complete faith in the qualities of Franck Terner to accelerate the transformation and growth of Air France, and mobilize all the Company's energy around the success of the Trust Together project. Franck Terner has spent his entire career in the Group, which he knows perfectly. He will be an excellent leader for Air France staff. He has a results-oriented culture and wide experience of social dialogue, which gives him everything he needs to succeed in his mission to serve the growth of Air France and the restoration of trust" declared Jean-Marc Janaillac. Born on 12 April 1960, Franck Terner is an Engineer, a graduate of the École Nationale Supérieure Electronique et Application (ENSEA), the Conservatoire national des Arts et Métiers (CNAM) and the Institut d'Administration des Entreprises (IAE) in Paris. Franck Terner joined Air France in 1988 as a Concorde production engineer. In 1989, he was in charge of scheduling and planning at the Maintenance Division of Air France and, in 1992, of production at repair workshops for on board equipment and in 1994, in charge of Concorde maintenance. In 1997, he took responsibility for Light Maintenance at Orly and, in 2000, for the Maintenance of the Air France medium-haul fleet. In 2002, he was appointed Head of Aircraft Maintenance at Regional, an Air France subsidiary, and in 2007 Executive Vice President Operations and Support at Regional. In 2008, he was appointed Chief Operating Officer at Regional. In 2010, he was appointed Vice President of Air France Industries. Since July 1st, 2013, he has been Executive Vice-President Engineering and Maintenance, Air France-KLM. He was appointed CEO of Air France on 2 November 2016.
Maoudj R.,CNAM |
Terre M.,CNAM |
2015 23rd International Conference on Software, Telecommunications and Computer Networks, SoftCOM 2015 | Year: 2015
In this paper we introduce an adapted Constant Modulus Algorithm in order to identify the impulse response of an unknown propagation channel. This algorithm deals with the output of a fourth order moment estimation algorithm of received samples. This paper can be viewed as a follow up of a previous work devoted on blind channel estimation . It will be shown how results obtained in this previous work can be used as an initialization of the proposed adapted CMA, leading to a subsequent performances improvement. © 2015 University of Split, FESB.
Joseph P.,Institute AeroTechnique IAT |
Amandolese X.,CNAM |
Aider J.-L.,ESPCI ParisTech
Experiments in Fluids | Year: 2012
This paper highlights steady and unsteady measurements and flow control results obtained on an Ahmed model with slant angle of 25° in wind tunnel. On this high-drag configuration characterized by a large separation bubble along with energetic streamwise vortices, time-averaged and time-dependent results without control are first presented. The influence of rear-end periodic forcing on the drag coefficient is then investigated using electrically operated magnetic valves in an open-loop control scheme. Four distinct configurations of flow control have been tested: rectangular pulsed jets aligned with the spanwise direction or in winglets configuration on the roof end and rectangular jets or a large open slot at the top of the rear slant. For each configuration, the influence of the forcing parameters (non-dimensional frequency, injected momentum) on the drag coefficient has been studied, along with their impact on the static pressure on both the rear slant and vertical base of the model. Depending on the type and location of pulsed jets actuation, the maximum drag reduction is obtained for increasing injected momentum or well-defined optimal pulsation frequencies. © Springer-Verlag 2011.
Le Prado C.,CNAM |
Proceedings - 40th International Computer Music Conference, ICMC 2014 and 11th Sound and Music Computing Conference, SMC 2014 - Music Technology Meets Philosophy: From Digital Echos to Virtual Ethos | Year: 2014
In the design process of interactive sound walk art installations, the composer must think his sound design in a real or a virtual space according to the listener's promenade. For a given piece, the sound designer leaves to the interactor a certain amount of freedom and to the system, according to its level of self-sufficiency, a certain amount of autonomy. This paper presents an analysis of this fundamental composition choice between determinism, emergence and interactivity. In the first part, this problem is stated as the position of an art piece in the D.I.S. (Designer/Interactor/System) triangle. We analyze from this point of view several interactive pieces. The second part concerns mainly the design process of The Listening Walker scripted version. This interactive sound walk relies on the technology and the design principle of video games. In the scripting style, the designer takes the point of view of the interactor, who becomes the narrator. We conclude by an introduction to the second version of the same piece written according to the emergent style. In this case the designer takes the point of view of Non Player Characters controlled by the system. Copyright: © 2014 First author et al.