Distributed Fiber Optic Sensors for multiple crack monitoring in reinforced concrete structures
12th International Workshop on Structural Health Monitoring, IWSHM, STANFORD, ETATS-UNIS, 10-/09/2019 - 12/09/2019
How efficient are stormwater control measures for micropollutant management? Feedback from Matriochkas, MicroMégas and R...
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The pooling of results from three French projects (Matriochkas, MicroMégas and Roulépur), within the framework of a working group on methodological harmonisation, makes it possible to analyse the performance of a wide range of stormwater control measures (SCMs) in terms of micropollutant load reduction. Data covers 12 management systems, in 9 diffe...
On-board indirect measurements of the acoustic quality of railway track: state-of-the art and simulations
Noise emission is a major concern for residents living along railway lines. For a large range of conventional speeds, railway noise is dominated by rolling noise. The contribution of the track to rolling noise is mainly driven by the level of rail roughness and the Track Decay Rate (TDR). The MEEQUAI project (on-board measurement of the acoustic qu...
Mesure embarquée de la qualité acoustique de l'infrastructure ferroviaire-Projet MEEQUAI
Pour les riverains des infrastructures ferroviaires, les émissions acoustiques constituent une préoccupation de premier plan. Parmi les sources incriminées, le bruit de roulement est prépondérant pour une large gamme de vitesses d'exploitation. Pour ce qui est de l'infrastructure, le niveau de bruit de roulement est principalement déterminé par deu...
Dynamic approaches for the characterization and mitigation of urban sound environments
Awareness of the health effects of noise gradually became apparent in the second half of the 20th century, in contrast to the parallel urban planning decisions, which left a significant place for the automobile in the city. The high noise levels, combined with the increasing aspiration of city dwellers for a peaceful and environmentally friendly ci...
Encouraging Results of International Friction Measurement Harmonization through Quality Assurance and Calibration
The friction measurement devices being used today in accordance with various international standards for the assessment of surface conditions on highways and runways are numerous. Although among the different equipment designs there are only a few substantially different measurement principles, they all have a significant number of design and opera...
Calibration des capteurs d'un vélo instrumenté
Confronté à des défis sociaux, économiques et écologiques, les politiques publiques de mobilité urbaine font du vélo un axe majeur de développement. Par ailleurs, les maitres d'ouvrage changent de paradigme en passant d'une culture traditionnelle de mise à disposition d'une infrastructure à une offre de mobilité centrée sur les usages. Le Cerema a ...
Propagation Experiment at Ka-Band in French Guiana: First Year of Measurements
ONERA, the French Aerospace Lab, and CNES, the French Space Agency, are currently running a Ka-band propagation experiment at the Guiana Space Centre (CSG) in Kourou (French Guiana). A rain gauge and a beacon receiver able to record the 20.2 GHz beacon signal of the Amazonas 3 satellite have been deployed. The equipment is operational since January...
Evaluating individual risk proneness with vehicle dynamics and self-report data × toward the efficient detection of At-r...
Vehicle-dynamics data, now more readily available thanks to moderate-cost, embedded data logging solutions, have been used to study drivers' behavior (acceleration, braking, and yaw rate) through naturalistic driving research aimed at detecting critical safety events. In addition, self-reported measures have been developed to describe these events ...
Vers une caractérisation harmonisée des propriétés phoniques des revêtements de chaussée : essais croisés CPX sur véhicu...
Les revêtements de chaussée jouent un rôle prépondérant dans l'émission de bruit d'un tra c routier. Il est donc important de pouvoir caractériser leurs performancesavec précision. La méthode de mesure du bruit de roulement dite CPX (Close ProXimity) qui vient d'être récemment normalisée à l'échelle internationale, est un outil particulièrement ada...
