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576 results on '"Lefèvre, Philippe"'

4. Fingerpad Contact Evolution Under Electrovibration

Author

Sirin, Omer, Barrea, Allan, Lefèvre, Philippe, Thonnard, Jean-Louis, and Basdogan, Cagatay

Subjects
Computer Science - Human-Computer Interaction
Abstract

Displaying tactile feedback through a touchscreen via electrovibration has many potential applications in mobile devices, consumer electronics, home appliances, and automotive industry though our knowledge and understanding on the underlying contact mechanics is very limited. An experimental study was conducted to investigate the contact evolution between the human finger and a touchscreen under electrovibration using a robotic set-up and an imaging system. The results show that the effect of electrovibration is only present during full slip but not before slip. Hence, coefficient of friction increases under electrovibration as expected during full slip, but the apparent contact area is significantly smaller during full slip when compared to that of no electrovibration condition. It is suggested that the main cause of the increase in friction during full slip is due to an increase in real contact area and the reduction in apparent area is due to stiffening of the finger skin in tangential direction.

Published
2021
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26. Multicenter Performance Evaluation of the Revogene® GBS DS Real-Time PCR Assay for Group B Streptococcus Detection During Labor.

Author

d'Otreppe, Stéphanie, Lefèvre, Philippe, Meex, Cécile, Devey, Anaïs, Sacheli, Rosalie, Gerard, Martin, and Melin, Pierrette

Subjects
*STREPTOCOCCUS agalactiae, *LABOR (Obstetrics), *WOMEN'S hospitals, *BIRTHING centers
Abstract

Purpose: This study aimed to evaluate the performance and ease of use of the Revogene® GBS DS PCR assay for the intrapartum detection of Group B Streptococcus (GBS) colonization, as compared with intrapartum culture and antenatal culture-based screening. Methods: Between April and August 2019, 398 women who gave birth in one of the three maternities participating in this study agreed to the collection of a vaginal swab when they arrived in the labor ward. The samples were immediately sent to the adjacent laboratory where they were discharged into the buffer provided with the Revogene® GBS DS assay. Part of the buffer was used to perform the Revogene® GBS DS test, and part of the same buffer was used for GBS culture. Results: The Revogene® GBS DS assay provided a valid result in less than 70 min for 356 (89%) women. The sensitivity of the test was 85.7% (66.4–95.3%). The specificity of the test was 99.1% (97.3–99.8%). The positive predictive value was 88.9% (69.7–97.1%). The negative predictive value was 98.9% (96.9–99.6%). Conclusion: The easy-to-use Revogene® GBS DS assay provides a valuable tool for the detection of GBS colonization at the beginning of labor. The sensitivity and turn-around time are adequate. The high number of invalid results needs to be addressed before the Revogene® GBS DS test can be expected to replace the current screening-based approach. [ABSTRACT FROM AUTHOR]

Published
2023
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43. Measurement and Influence of the Skin Moisture in Dexterous Manipulation

Author

André, Thibaut, Lefèvre, Philippe, Thonnard, Jean-Louis, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, and Ferre, Manuel, editor

Published
2008
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