National School of Public Civil Engineering

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Vaulx-en-Velin, France
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Jelfs S.,University of Cardiff | Culling J.F.,University of Cardiff | Lavandier M.,National School of Public Civil Engineering
Hearing Research | Year: 2011

Lavandier and Culling [Lavandier, M. and Culling, J. F. 2010. Prediction of binaural speech intelligibility against noise in rooms. J. Acoust. Soc. Am. 127, 387-399] demonstrated a method of predicting human speech reception thresholds for speech in combined noise and reverberation. An updated version of the model is presented, which is substantially more computationally efficient. The updated model makes similar predictions for the SRT data considered by Lavandier and Culling, which tested the model's ability to predict effects of binaural unmasking and room colouration. In addition, we show here that the model accurately predicts the effects of headshadow and reproduces a range of data sets from the literature, including situations with multiple interfering sounds in anechoic conditions. © 2011 Elsevier B.V.


Grant
Agency: European Commission | Branch: FP7 | Program: CP-IP | Phase: NMP.2011.4.0-2 | Award Amount: 14.75M | Year: 2012

The NeTTUN 54M project will enable groundbreaking change in the construction, management and maintenance of tunnels in pursuit of the goals of NMP.2011.4.0-2 via 9 focussed WPs addressing key scientific and technical challenges: (i) a multi-sensor ground prediction system for TBMs to enable effective look-ahead during boring; (ii) a robotic maintenance system that enables automation of inspection and exchange of drag bits and disc cutters; (iii) the design of cutter tools with increased lifetime; (iv) a system for modelling of global risks on tunnel projects in order to quantify and manage uncertainties; (v) systems for modelling and controlling the impact of tunnelling on surrounding structures; (vi) a Decision Support system for tunnel maintenance management. The improvements enabled by this work programme will enhance every aspect of the lifecycle of tunnelling: from design, to construction, and maintenance of Europes extensive tunnel legacy. Each of the 21 partners in the NeTTUN Consortium Industrial, Research and Development and SME has been invited to participate because of unique scientific expertise and tunnelling sector experience. Ecole Centrale de Lyon, a French top-level engineering school involved in international research, will be the NeTTUN project coordinator. NFM, the French Tunnel Boring Machine manufacturer, will manage the scientific and technical aspects of the project. Both these organisations will work as a team. NeTTUN project results will impact the tunnelling industry by enlarging business perspectives, with productivity increase; delivering underground operations with zero impact on surroundings; answering societal needs by improving safety; and strengthening competitiveness of European industry. The Consortium will demonstrate project results on the site of Metro Line C construction under Romes ancient monuments, as well as with OHL on the Guadalquivir, and Razel on the Frjus Tunnels. Dissemination, Exploitation and Gender Equality Committees will ensure the Consortiums activities and successful project results are promoted to the target audiences of the general public, the tunnelling industry and education and academic sectors.


Grant
Agency: European Commission | Branch: FP7 | Program: CP | Phase: SPA.2010.1.1-01 | Award Amount: 3.18M | Year: 2011

The project ENDORSE aims at a user-driven development of downstream services in renewable energies by exploiting the GMES Core Services (MACC, SAFER and Geoland 2) together with other EO/in-situ data and modelling. It addresses regional services promoting the energy use from sun, wind, and biomass, electricity grid management and building engineering through daylighting in buildings. The consortium has teamed with relevant users to stimulate the development of sustainable and transferable downstream services. ENDORSE will 1) develop and validate pre-market downstream services in collaboration with well-defined end-users by performing R&D activities; 2) assess the conditions for self-sustainability of these services through surveys and workshops with end-users; 3) disseminate the achievements of the project to foster the use of Core Services data and other EO data by the renewable energies community; 4) stimulate the market of downstream services in renewable energies towards the end-users community, and the development of such services by SMEs and other service-oriented companies by demonstrating precursors with documented conditions of sustainability. The expected major outcomes of ENDORSE are 1) scientific advances in assessment of surface air temperature and solar radiation, and data fusion; 2) a set of validated and documented innovative methods exploiting Core Services data and other EO data; 3) a portfolio of pre-market services, serving as precursors and examples of best practices for similar downstream services (other regions, other providers), with documented conditions of sustainability; 4) a stimulation of the renewable energies community towards exploitation of Core Services data and other EO data; 5) a stimulation of the service industry towards development of downstream services; 6) feedbacks to Core Services on their data, and as a whole to GMES and GEOSS on the exploitation of EO data in renewable energies area.


Grant
Agency: European Commission | Branch: H2020 | Program: CSA | Phase: LCE-32-2016 | Award Amount: 2.00M | Year: 2017

SHAPE-ENERGY Social Sciences and Humanities for Advancing Policy in European Energy will develop Europes expertise in using and applying energy-SSH to accelerate the delivery of Europes Energy Union Strategy. Our consortium brings together 7 leading academic partners and 6 highly respected policy, industry and communications practitioners from across the Energy, Social Sciences and Humanities (energy-SSH) research field, to create an innovative and inclusive Platform. Our partners are involved in numerous European energy projects, have extensive, relevant networks in the energy domain, and represent exceptional coverage across SSH disciplines across Europe. These enable us to maximise the impact of our Platform delivery within an intensive 2-year project. SHAPE-ENERGY brings together those who demand energy-SSH research and those who supply that research to collaborate in shaping Europes energy future. A key deliverable will be a 2020-2030 research and innovation agenda to underpin post-Horizon 2020 energy-focused work programmes. It will highlight how energy-SSH can be better embedded into energy policymaking, innovation and research in the next decade. Our SHAPE-ENERGY Platform activities will involve >12,114 stakeholders and begin with scoping activities including: an academic workshop, call for evidence, interviews with business leaders and NGOs, online citizen debates and multi-level policy meetings. We will build on our scoping to then deliver: 18 multi-stakeholder workshops in cities across Europe, an Early Stage Researcher programme, Horizon 2020 sandpits, interdisciplinary think pieces, a research design challenge, and a pan-European conference. Our expert consortium will bring their considerable expertise to overcome difficulties in promoting interdisciplinary and cross-sector working, and reach out to new parts of Europe to create an inclusive, dynamic and open Platform. SHAPE-ENERGY will drive forward Europes low carbon energy future.


Patent
French Atomic Energy Commission, National School of Public Civil Engineering, INSA Lyon and French National Center for Scientific Research | Date: 2014-12-02

A method is provided for detecting a perturbation with respect to an initial state, of a device comprising at least one resonant mechanical element exhibiting a physical parameter sensitive to a perturbation such that the said perturbation modifies the resonance frequency of the said resonant mechanical element. A device is provided for detecting a perturbation by hysteretic cycle comprising at least one electromechanical resonator with nonlinear behaviour and means for actuation and for detection of the reception signal via a transducer so as to analyse the response signal implementing the method. A mass sensor and a mass spectrometer using the device are also provided.


Soubestre J.,CEA DAM Ile-de-France | Boutin C.,National School of Public Civil Engineering
Mechanics of Materials | Year: 2012

This article deals with the effective dynamic behavior of elastic materials periodically reinforced by stiff linear slender elastic inclusions. By assuming a small scale ratio e between the period section size and the characteristic size of the system global strain, and by weighing the constituents stiffness contrast by powers of ε, the dynamic macroscopic behavior at the leading order is derived through the asymptotic homogenization method of periodic media considering different frequency ranges. A two order stiffness contrast (μm=μp = O(ε2)) is shown to lead to a dynamic macroscopic behavior spatially non-local in the transverse direction, where the system behaves as a generalized inner bending continuum, and temporally non-local in the axial direction, where the system behaves, at higher frequency, as a metamaterial in which internal resonance phenomena take place. The consequences of such non-localities on the reinforced medium modes are examined. The system axial and transverse modes are shown to be significantly different from those of usual composites. © 2012 Elsevier Ltd. All rights reserved. 1. Introduction.


Auriault J.-L.,Joseph Fourier University | Boutin C.,National School of Public Civil Engineering
International Journal of Solids and Structures | Year: 2012

We revisit an ancient paper (Auriault and Bonnet, 1985) which points out the existence of cut-off frequencies for long acoustic wavelength in high-contrast elastic composite materials, i.e. when the wavelength is large with respect to the characteristic heterogeneity length. The separation of scales enables the use of the method of multiple scale expansions for periodic structures, a powerful upscaling technique from the heterogeneity scale to the wavelength scale. However, the results remain valid for non-periodic composite materials which show a Representative Elementary Volume (REV). The paper extends the previous investigations to three-component composite materials made of hard inclusions, coated with a soft material, both of arbitrary geometry, and embedded in a connected stiff material. The equivalent macroscopic models are rigorously established as well as their domains of validity. Provided that the stiffness contrast within the soft and the connected stiff materials is of the order of the squared separation of scales parameter, it is demonstrated (i) that the propagation of long wave may coincide with the resonance frequencies of the hard inclusions/soft material system and (ii) that the macroscopic model presents a series of cut-off frequencies given by an eigenvalue problem for the resonating domain in the cell. These results are illustrated in the case of stratified composites and the possible microstructures of heterogeneous media in which the inner dynamics phenomena may occur are discussed.© 2012 Elsevier Ltd. All rights reserved.


Arnaud L.,National School of Public Civil Engineering | Gourlay E.,National School of Public Civil Engineering
Construction and Building Materials | Year: 2012

Hemp concrete is a multifunctional ecological material used in buildings. Due to its high porosity (about 80% in volume), it presents an "atypical" mechanical behavior and its thermal and acoustic properties are particularly interesting. It is today possible to design this material according to the required use. This paper focuses on the mechanical properties of hemp concrete. It is shown that extreme curing conditions (30%, 75% and 98% RH) are prejudicial to the mechanical setting of the hydraulic binders whereas only high relative humidity disrupts the one of the air lime-based binder. It is also established that the binder content hugely influences the setting and hardening of the material. Finally, according to the hemp particle size, it appears that small particles (about 3 mm in length) lead to reduce the porosity and consequently the setting process of hemp concrete as compared to concrete manufactured with large particles (about 9 mm). © 2011 Elsevier Ltd. All rights reserved.


Boutin C.,National School of Public Civil Engineering
Journal of the Acoustical Society of America | Year: 2013

This paper deals with the acoustics of rigid porous media with inner resonators both saturated by the same gas. The aim is to define porous media microstructures in which inner resonance phenomena may occur, and to provide the modeling of acoustic waves in this situation. The first part, focuses on the design of a periodic medium consisting in damped Helmholtz resonators embedded in a porous matrix. In the second part, the macroscopic description of this system is established through the homogenization method. In the third part, the features of acoustic wave propagation are determined, and the occurrence of a broad band gap along with strongly dispersed waves is discussed according to the characteristics of the porous matrix and of the damped resonators. © 2013 Acoustical Society of America.


Grant
Agency: European Commission | Branch: H2020 | Program: ERC-COG | Phase: ERC-CoG-2014 | Award Amount: 1.98M | Year: 2015

The MAGnUM project aims to (i) create a consistent set of interrelated dynamic and multimodal traffic models able to capture driver behaviours at the different urban scales and (ii) apply this variety of models to design efficient and green traffic management strategies. Traffic flow dynamics is well reproduced at a local urban scale by the kinematic wave model and its numerous extensions. Even if this model is parsimonious compared to other modelling approaches, it can hardly be applied at larger urban scales for traffic control applications. Very recently, a new modelling approach has been proposed to represent congestion dynamics at large scales. It relates the total travel production to the vehicle accumulation in a traffic network with for now a restrictive condition about network homogeneity. This approach is very promising for designing new traffic management systems but heterogeneous situations should be handled by properly connecting with the local scale to account for the effects of the local distributions and variations of the driver behaviour (demand) and the network structure (supply). Investigating these relationships and proposing a full set of consistent models representing traffic dynamics at several relevant scales (successive spatial and temporal integration) is very challenging with high potential gains for traffic control applications. This is the primary goal of MAGnUM and will be achieved by mixing analytical investigations on idealized but insightful test cases with explanatory approaches based on data gained from dynamic simulations or serious game sessions on more realistic and complex cases. The second goal of the project concerns the design of innovative traffic management strategies at multiple urban scales. Breakthroughs will be achieved by considering multiple and competitive objectives when optimizing with a tight focus on environment issues and multi-modality.

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