Anti-Heparanase Aptamers as Potential Diagnostic and Therapeutic Agents for Oral Cancer

Peer reviewe

Application du contrôle actif aux instabilités aérodynamiques

This paper describes experimental investigations in which adaptive methods are applied to various structures of active control of flow instabilities : flow excited cavity oscillations, compressor surge, and bursting phenomena in laminar boundary layer. The main results are as follows : the adaptive controller manages to automatically find its optimal characteristics in order to cancel the instability in the three experiments under consideration. In the boundary layer case, despite the non linear behaviour of the bursting process, a periodic train of artificially generated burst is significantly reduced downstream the cancelling source

Casque antibruit actif basses-fréquences et audition dans le bruit

A low-frequency active anti-noise headset has been made, and tested on human ears with regard to hearing in noise. Psychoacoustic methods are used in order to quantify the improvement in audibility and intelligibility. Under low-frequency noise, a spectacular effect of anti-noise is observed, while headset wearing brings just a very little global improvement because of negative passive effect. Besides optimization of passive acoustic attenuation, evaluation of such an apparatus is faced with interindividual hearing in noise variability

Advanced beamforming techniques for passive imaging of stable and inertial cavitation

International audienc

Lift improvement usign piezoelectric actuator

This paper deals with the determination of the lift improvement of plane winy using pulsed jets generated by piezoelectric actuators. This actuator is constituted by a large bimorph constituted by piezoelectric patches cemented on a brass plate. The bimorph is inserted into a rigid case and one of the long edge plate is clamped the other is free. An alternating voltage is applied to the piezoelectric patches inducing the bending of the brass plate which opens and closes a 100 x 1 mm2 slit. Due to the internal static pressure pulsated jets arc formed and escape the slit. This actuator is inserted into a particular wing profile in order to measure the pressure modifications induced by the jets and the corresponding lift improvements are deduced. The best functioning conditions of the actuator and the lift improvement are determined and discusse

High pressure-induced gel formation of chicken meat patties

High pressure treatments produce gelified chicken meat patties with new properties thigh water retention and cohesive texture) and without salt or fat addition. In comparison with heat-induced patties, the pressurised patties present an equivalent hardness with better water binding properties. Pressurisation causes an increase of the colour lightness parameter (L*) and a decrease of redness (a*) and yellowness (b*); but the meat discoloration provoked by the pressure treatments is less significant than the colour changes induced by heating. The pressure-gelation of chicken meat patties is affected by the intensity, the duration and the temperature of the process. The elevation of pressure from 400 to 600 MPa enhances the texture qualities and the water binding capacity of formed gels. A positive effect on texture quality. is observed by prolonging the pressurisation time up to 30 min. The pressurisation temperature (between 15 and 40 degreesC) has no effect on product quality. Addition of salt (fat) prevents (reduces) the gelation ability of meat patties under pressure, whereas it improves the texture of heat-induced gels

Streaming of vowel sequences based on fundamental frequency in a cochlear-implant simulation1

Cochlear-implant (CI) users often have difficulties perceiving speech in noisy environments. Although this problem likely involves auditory scene analysis, few studies have examined sequential segregation in CI listening situations. The present study aims to assess the possible role of fundamental frequency (F0) cues for the segregation of vowel sequences, using a noise-excited envelope vocoder that simulates certain aspects of CI stimulation. Obligatory streaming was evaluated using an order-naming task in two experiments involving normal-hearing subjects. In the first experiment, it was found that streaming did not occur based on F0 cues when natural-duration vowels were processed to reduce spectral cues using the vocoder. In the second experiment, shorter duration vowels were used to enhance streaming. Under these conditions, F0-related streaming appeared even when vowels were processed to reduce spectral cues. However, the observed segregation could not be convincingly attributed to temporal periodicity cues. A subsequent analysis of the stimuli revealed that an F0-related spectral cue could have elicited the observed segregation. Thus, streaming under conditions of severely reduced spectral cues, such as those associated with CIs, may potentially occur as a result of this particular cue