References of "Verly, Jacques"
     in
Bookmark and Share    
See detailLa 3D : la technologie qui a changé l'histoire du monde
Verly, Jacques ULg

Conference given outside the academic context (2016)

Detailed reference viewed: 10 (1 ULg)
Full Text
Peer Reviewed
See detailThe ULg Multimodality Drowsiness Database (called DROZY) and Examples of Use
Massoz, Quentin ULg; Langohr, Thomas ULg; François, Clémentine ULg et al

in Proceedings of the 2016 IEEE Winter Conference on Applications of Computer Vision (WACV) (2016)

Drowsiness is a major cause of accidents, in particular in road transportation. It is thus crucial to develop robust drowsiness monitoring systems. There is a widespread agreement that the best way to ... [more ▼]

Drowsiness is a major cause of accidents, in particular in road transportation. It is thus crucial to develop robust drowsiness monitoring systems. There is a widespread agreement that the best way to monitor drowsiness is by closely monitoring symptoms of drowsiness that are directly linked to the physiology of an operator such as a driver. The best systems are completely transparent to the operator until the moment he/she must react. In transportation, cameras placed in the passenger compartment and looking at least at the face of the driver are most likely the best way to sense physiology related symptoms such as facial expressions and the fine behavior of the eyeballs and eyelids. We present here the new database (available on http://www.drozy.ulg.ac.be) called DROZY that provides multiple modalities of data to tackle the design of drowsiness monitoring systems and related experiments. We also present two novel systems developed using this database that can make predictions about the speed of reaction of an operator by using near-infrared intensity and range images of his/her face. [less ▲]

Detailed reference viewed: 106 (60 ULg)
Full Text
Peer Reviewed
See detailTests of a new drowsiness characterization and monitoring system based on ocular parameters
François, Clémentine ULg; Hoyoux, Thomas ULg; Langohr, Thomas ULg et al

in International Journal of Environmental Research and Public Health (2016)

Detailed reference viewed: 17 (5 ULg)
Peer Reviewed
See detailExtraction of temporal gait parameters using a reduced number of wearable accelerometers
Boutaayamou, Mohamed ULg; Denoël, Vincent ULg; Bruls, Olivier ULg et al

in Proceedings of the 9th International Conference on Bio-inspired Systems and Signal Processing (2016)

Wearable inertial systems often require many sensing units in order to reach an accurate extraction of temporal gait parameters. Reconciling easy and fast handling in daily clinical use and accurate ... [more ▼]

Wearable inertial systems often require many sensing units in order to reach an accurate extraction of temporal gait parameters. Reconciling easy and fast handling in daily clinical use and accurate extraction of a substantial number of relevant gait parameters is a challenge. This paper describes the implementation of a new accelerometer-based method that accurately and precisely detects gait events/parameters from acceleration signals measured from only two accelerometers attached on the heels of the subject’s usual shoes. The first step of the proposed method uses a gait segmentation based on the continuous wavelet transform (CWT) that provides only a rough estimation of motionless periods defining relevant local acceleration signals. The second step uses the CWT and a novel piecewise-linear fitting technique to accurately extract, from these local acceleration signals, gait events, each labelled as heel strike (HS), toe strike (TS), heel-off (HO), toe-off (TO), or heel clearance (HC). A stride-by-stride validation of these extracted gait events was carried out by comparing the results with reference data provided by a kinematic 3D analysis system (used as gold standard) and a video camera. The temporal accuracy ± precision of the gait events were for HS: 7.2 ms ± 22.1 ms, TS: 0.7 ms ± 19.0 ms, HO: ‒3.4 ms ± 27.4 ms, TO: 2.2 ms ± 15.7 ms, and HC: 3.2 ms ± 17.9 ms. In addition, the occurrence times of right/left stance, swing, and stride phases were estimated with a mean error of ‒6 ms ± 15 ms, ‒5 ms ± 17 ms, and ‒6 ms ± 17 ms, respectively. The accuracy and precision achieved by the extraction algorithm for healthy subjects, the simplification of the hardware (through the reduction of the number of accelerometer units required), and the validation results obtained, convince us that the proposed accelerometer-based system could be extended for assessing pathological gait (e.g., for patients with Parkinson’s disease). [less ▲]

Detailed reference viewed: 142 (24 ULg)
See detailGeneral Chair and Co-Organizer of (2015) "3D Stereo MEDIA: The International 3D Summit for Science, Technology, Art, and Business". Held in Liège, Belgium, on 14-17 Dec 2015, at Theater of Liège and University of Liège. 7th edition. J. G. Verly initiated event in 2008.
Verly, Jacques ULg

Book published by Image&3D Europe ASBL (2015)

3D Stereo MEDIA 2015 was held in Liège, Belgium, on 14-15 Dec 2015, and comprised the following sub-events: 3D Workshop in Cannes (Festival de Cannes, American Pavilion, Cannes, France, 15 May 2015 ... [more ▼]

3D Stereo MEDIA 2015 was held in Liège, Belgium, on 14-15 Dec 2015, and comprised the following sub-events: 3D Workshop in Cannes (Festival de Cannes, American Pavilion, Cannes, France, 15 May 2015), Scientific Conference: 2015 International Conference on 3D Imaging (IC3D 2015), 3D Content Financing Market, International 3D Festival, Professional Conference, 3D Academy, Awards Evening. [less ▲]

Detailed reference viewed: 23 (1 ULg)
See detailLa 3D, son histoire et son actualité à l'ULg
Verly, Jacques ULg

Conference given outside the academic context (2015)

Detailed reference viewed: 16 (2 ULg)
See detailEvaluation of head-up and head-down displays in stereoscopic driving simulation environment
Grogna, David ULg; Sodnik, Jaka; Verly, Jacques ULg et al

Conference (2015, November 10)

Detailed reference viewed: 17 (2 ULg)
See detailLa 3D dans toutes ses dimensions ! - Introduction
Verly, Jacques ULg

Speech/Talk (2015)

Detailed reference viewed: 13 (0 ULg)
Full Text
See detailArchitecture of educational OUFTI-1 nanosatellite of University of Liège, as tested in preparation for space flight
Werner, Xavier ULg; De Dijcker, Sébastien ULg; Broun, Valery ULg et al

Poster (2015, September)

Overview of the OUFTI-1 nanosatellite space segment. The OUFTI-1 project was initiated in September 2007. The nanosatellite is a one-unit (1U) CubeSat. Its main payload is - in essence - a D-STAR repeater ... [more ▼]

Overview of the OUFTI-1 nanosatellite space segment. The OUFTI-1 project was initiated in September 2007. The nanosatellite is a one-unit (1U) CubeSat. Its main payload is - in essence - a D-STAR repeater in space, potentially the first one ever. D-STAR is an amateur-radio (“ham”), digital radio communication - protocol (with associated equipment) allowing the simultaneous transmission of voice and data, such as GPS coordinates and call-signs. [less ▲]

Detailed reference viewed: 59 (1 ULg)
Full Text
See detailOverview of the ground facilities for controlling the OUFTI-1 nanosatellite and for routing its radio-communications through the worldwide D-STAR repeater network
Werner, Xavier ULg; De Dijcker, Sébastien ULg; Broun, Valery ULg et al

Poster (2015, September)

Overview of the current state and upgrade plan of the OUFTI-1 nanosatellite ground segment. The OUFTI-1 project was initiated in September 2007. The OUFTI-1 nanosatellite is a one-unit (1U) CubeSat. Its ... [more ▼]

Overview of the current state and upgrade plan of the OUFTI-1 nanosatellite ground segment. The OUFTI-1 project was initiated in September 2007. The OUFTI-1 nanosatellite is a one-unit (1U) CubeSat. Its main payload is - in essence - a D-STAR repeater in space, potentially the first one ever. D-STAR is an amateur-radio (“ham”), digital radio-communication protocol (with associated equipment) allowing the simultaneous transmission of voice and data, such as GPS coordinates and call-signs. The satellite was tested in 2014 and 2015 within the ESA’s Education Office Fly Your Satellite! (FYS) project, and it is now fully qualified and ready for launch and operation in space. [less ▲]

Detailed reference viewed: 47 (1 ULg)
Full Text
See detailThermal-vacuum and vibration test campaigns that led to the OUFTI-1 nanosatellite being fully qualified by ESA for launch and operation in Earth orbit
De Dijcker, Sébastien ULg; Werner, Xavier ULg; Broun, Valery ULg et al

Conference (2015, September)

OUFTI-1’s test campaigns were divided into two phases. The goal of Phase 1 is to demonstrate that the different functionalities of the satellite work as intended. The goal of Phase 2 is to subsequently ... [more ▼]

OUFTI-1’s test campaigns were divided into two phases. The goal of Phase 1 is to demonstrate that the different functionalities of the satellite work as intended. The goal of Phase 2 is to subsequently demonstrate that the satellite can withstand the launch into orbit, and then work properly in the conditions of space. The corresponding tests thus involve both thermal-vacuum environmental tests (in appropriate test chambers) and vibration tests (on appropriate vibration pods). The conditions simulated during these tests are as close as possible to those that the satellite will encounter during its mission, covering as many cases as possible, amid uncertainties, since neither the launcher nor the orbit were known prior to the tests. Both phases involve the flight model (FM), in accordance with the so-called "protoflight" approach. [less ▲]

Detailed reference viewed: 83 (6 ULg)
Peer Reviewed
See detailHow novice and expert drivers adjust their driving behavior when they feel drowsy?
Berastegui, Pierre ULg; Piette, Christine; François, Clémentine ULg et al

Poster (2015, July 29)

This paper aims to explore adaptive behaviors developed by drivers to prevent drowsiness. Specifically, we postulate that driving expertise is associated with better drowsiness awareness, allowing experts ... [more ▼]

This paper aims to explore adaptive behaviors developed by drivers to prevent drowsiness. Specifically, we postulate that driving expertise is associated with better drowsiness awareness, allowing experts to adequately adjust their driving behaviors when they feel drowsy. The present study was carried on a high-fidelity driving simulator coupled with an innovative system allowing objective sleepiness assessment based on EEG and Eye-tracking data. The Karolinska Sleepiness Scale was used to evaluate subjective drowsiness. The ratio between objective and subjective assessments gave an indicator of drowsiness awareness. Standard Deviation of Lateral Position (SDLP) was used as a measure of performance while driving speed and ocular fixations were recorded in order to highlight adaptive behaviors. 16 subjects were recruited from general population and categorized in two groups of expertise based on the Belgian Institute for Road Safety’s criteria. Our results show that expert drivers show better drowsiness awareness than novices and mobilize speed increasing and vigilance reallocation strategies to maintain satisfactory level of drowsiness. [less ▲]

Detailed reference viewed: 59 (18 ULg)