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2 results on '"Guironnet C"'

1. Etude expérimentale de la fragmentation des marnes

Author

Le Bouteiller, Caroline, Guironnet, C., Naaim-Bouvet, F., Mathys, M., Érosion torrentielle, neige et avalanches (UR ETGR (ETNA)), Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF), and AgroParisTech

Subjects
[SDE]Environmental Sciences
Abstract

International audience; Impact experiments are performed in order to characterize the dynamic rupture of marls coming from the region of Terres Noires (French Alps). Marly stones are dropped above a hard surface and fragmentation events are recorded. Statistical analysis shows that the impact velocity and the initial surface state (characterized by a fissuration index) are the main parameters influencing the fracture. A probability law for the rupture is therefore proposed. On the other hand, the mass, the number of previous impacts and the water saturation do not have a significant influence on the rupture. The masses of the fragments are also recorded and the empirical mass distribution of fragments is similar to what is found in existing studies about the fragmentation of brittle material.

Published
2010

2. Electrodermal reactivity to emotional stimuli in healthy subjects and patients with disorders of consciousness.

Author

Luauté J, Dubois A, Heine L, Guironnet C, Juliat A, Gaveau V, Tillmann B, and Perrin F

Subjects
Acoustic Stimulation methods, Adult, Aromatherapy methods, Case-Control Studies, Consciousness physiology, Consciousness Disorders psychology, Consciousness Disorders rehabilitation, Female, Humans, Male, Middle Aged, Music psychology, Auditory Perception physiology, Consciousness Disorders physiopathology, Emotions physiology, Galvanic Skin Response physiology, Olfactory Perception physiology
Abstract

Objectives: After a coma, one major challenge is the detection of awareness in patients with disorders of consciousness. In some patients, the only manifestation indicative of awareness is an appropriate emotional response. Preferred music is a powerful medium to elicit emotions and autobiographical memory. Furthermore, music has been shown to improve cognitive functions both in healthy subjects and patients with neurological impairment. We hypothesized that signs of awareness could be enhanced in some patients with disorders of consciousness under appropriate emotional stimulation such as preferred music and also probably preferred odors., Methods: To investigate an objective, easily recordable marker of emotions at the patients' bedside, electrodermal activity (skin conductance level, SCL) was assessed with stimulations in auditory and olfactory modalities, notably with preferred music, neutral sound, preferred odors, and neutral odors. The study was conducted in 11 patients with disorders of consciousness (DOC) and 7 healthy participants., Results: In healthy subjects, the mean amplitude of the SCL was increased during exposure to preferred music as compared to neutral sounds (respectively: 0.00037±0.0004 vs. - 0.00004±0.00019μS). No significant difference between conditions was detected in patients., Conclusion: The results of this study suggest that electrodermal activity could be a useful marker of emotions induced by music in healthy controls. However, it failed to show any significant difference between conditions in patients with DOC., (Copyright © 2018 Elsevier Masson SAS. All rights reserved.)

Published
2018
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