Lyon Natural Radiocarbon Measurements VI

This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform February 202

Lyon Natural Radiocarbon Measurements III

This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform February 202

Lyon Natural Radiocarbon Measurements IV

This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform February 202

Lyon Natural Radiocarbon Measurements VIII

This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform February 202

Lyon Natural Radiocarbon Measurements VII

This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform February 202

Lyon Natural Radiocarbon Measurements V

This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform February 202

Lyon Natural Radiocarbon Measurements II

This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform February 202

Recherche par la méthode cepstre de la fréquence fondamentale d'une onde harmonique entachée d'effet doppler : Application à l'estimation de paramètres sur le bruit rayonné par les véhicules routiers

Dans les études de bruit rayonné par les véhicules routiers en vue de leur identification le traitement des signaux doit fournir l'information vitesse de rotation" du moteur, ou "fréquence fondamentale". Parmi divers procédés possibles, l'emploi de la méthode CEPSTRE, appliquée à la Représentation conjointe en temps et fréquence, possède certains avantages. Le procédé permet d'extraire la période fondamentale d'un signal comportant de nombreuses composantes harmoniques, tout en mettant en évidence l'effet DOPPLER dû au mouvement de la source. Il apparaît que les composantes harmoniques de rang impair, tant par leur nombre que par leur puissance relative par rapport aux parasites, déterminent le succès du procédé. Le rapport (signal/parasite) pour ces composantes de rang impair est le paramètre déterminant quant à l'utilisation de la méthode. L'étude de divers véhicules isolés équipés de moteur à essence ou DIESEL circulant sur route, permet de vérifier le bien fondé du procédé en présence de divers parasites stationnaires ou non, tel le bruit de roulement

INFORMATION AND ORIENTATION NEEDS OF BLIND AND PARTIALLY SIGHTED PEOPLE IN PUBLIC TRANSPORTATION: BIOVAM PROJECT

Presented are results of the BIOVAM project in France concerning the problems experienced by the visually impaired who use public transportation, such as buses, subways, and trains. The project focused on information gathering and orientation processes in the public transportation context. The BIOVAM approach uses a questionnaire survey to identify the main difficulties that public transportation users with visual impairment must manage. The approach includes a review of promising devices that could reduce these difficulties, such as personal information systems and tactile pavements. An overview of the results obtained from the survey is presented, addressing the use of buses and subways. The main technical solutions considered by the project are described, and the research protocols that are to be used in the field experiments are presented. The results of the BIOVAM project could be used to make concrete recommendations to include the specific needs of travelers with visual impairment in the design of a public transport infrastructure