Santec Systems (United States)

Objectif : Cartographier les processus de formation et les actions d’éducation permanente vécues par les Agents de Santé Communautaire (ASC) dans le contexte de la santé familiale, ancrés dans le concept de culture. Méthodologie : Revue de portée suivant la méthodologie de l’Institut Joanna Briggs (JBI) et orientée par les Preferred Reporting Items for Systematic Reviews and Meta-Analyses Extension for Scoping Reviews (PRISMA-ScR). La recherche dans les bases de données BVS, EBSCO – Academic Search Premier, CINAHL, GreenFILE, SocINDEX, Embase, ERIC, Global Index Medicus, PUBMED, Scielo, Scopus, WOS a eu lieu en novembre et décembre 2022. Les termes de recherche étaient : Agents de santé communautaire, Formation professionnelle, Éducation permanente, Stratégie de santé familiale, Soins de santé primaires. Les études analysant les expériences de formation et d’actions d’Éducation Permanente en Santé (EPS) des ASC dans le contexte de la santé familiale ont été incluses. Endnote et le logiciel Rayyan ont été utilisés pour gérer la sélection des résultats. Le protocole de la revue a été enregistré sur Open Science Framework (OSF). Résultats : L’échantillon comprenait 25 études, générant deux catégories : La primauté de la culture de la formation technique instrumentale ; et La culture biomédicale orientant l’EPS. La formation des ASC traverse des phases de désinvestissement et d’invisibilité, étant axée sur le modèle biomédical. En revanche, les actions d’EPS, même ponctuelles, sont guidées par des thèmes émergents dans la santé. Conclusions : Les processus de formation et d’EPS des ASC traversent des chemins de construction et de déconstruction, de progrès et de reculs, à partir d’une culture qui entrave souvent le droit institué.

Generation of 265-fs millijoule pulses at 1940 nm from a solid-state regenerative amplifier has been demonstrated. The amplification chain consists of a thulium-doped fluoride (Tm:ZBLAN) fiber oscillator, a two stage Tm:ZBLAN fiber preamplifier, and a regenerative amplifier with a thermoelectrically cooled thulium-doped yttrium aluminium perovskite crystal. The newly developed light source is used for pumping an ultra broadband mid-infrared optical parametric amplifier based on a gallium selenide crystal. The 2.5-4 µm range of a multioctave supercontinuum, generated in a polarization-maintaining ZBALN fiber, is used as the MIR seed. The amplified signal in combination with the corresponding idler pulses spread from 2.5 to 10µm in a collinear geometry.

Les technologies de l’information et de la communication (TIC) font partie intégrante de la vie quotidienne des jeunes adultes et particulièrement des étudiants inscrits dans l’enseignement supérieur qui les utilisent largement dans le cadre de leurs études. En France, la quasi-totalité des 15-30 ans sont des internautes et la moitié d’entre eux ont utilisé Internet au moins une fois dans les douze derniers mois pour rechercher des informations ou des conseils sur la santé en général. Cependant, peu d’études ont porté sur les motivations, les compétences et l’utilisation d’Internet concernant les informations sur la santé mentale chez les étudiants. Ainsi, l’objectif de cet article était d’examiner comment les étudiants accèdent, comprennent, évaluent et appliquent l’information en santé mentale via les TIC. Dans le cadre de la littératie digitale en santé mentale, nous avons effectué une recherche exploratoire de type qualitatif auprès d’étudiants de l’université de Bordeaux pendant l’année universitaire 2017/2018. L’analyse de 21 entretiens semi-directifs a permis de relever que les étudiants ne savent pas réellement où s’orienter pour se renseigner en ligne sur la santé mentale. Bien qu’accoutumés aux nouvelles technologies, ils se méfient beaucoup de la qualité des informations trouvées sur Internet et jugent les sites officiels de santé trop complexes. Dans le but ultime d’améliorer le bien-être psychique des étudiants, il devient donc nécessaire de développer leur littératie digitale de santé mentale en proposant des formations et des outils numériques de qualité au sein des campus universitaires.

We generally analyze data measured at equal time intervals using fast Fourier transforms (FFTs). However, when for some reason we can only obtain unequally spaced measurement points, then the data become non-uniform and cannot be analyzed directly using FFTs. In this paper, the non-uniform trapezoidal integral discrete Fourier transform (TINUDFT) is proposed to replace the FFT, and is implemented in non-harmonic analysis (NHA) to develop non-uniform NHA (NUNHA) for non-uniform data. NUNHA improved the SNR by over 70 dB compared with the simple non-uniform sinusoidal signal frequency. NUNHA's effectiveness for swept source optical coherence tomography (SS-OCT) is shown by simulation.

Purpose: In this work, the spatial resolution and noise properties of a prototype full‐field transmission ultrasound imaging system employing an acousto‐optic (AO) liquid crystal detector were characterized. The AO effect is a phenomenon in which an incident acoustic wave field induces local birefringence changes in a liquid crystal. These birefringence changes manifest as brightness changes when the liquid crystal is optically illuminated using polarized light, thus providing spatial information about the field. Methods: A compressed, Zerdine‐based breast phantom containing 12 artificial spherical lesions was imaged using plane‐wave ultrasound illumination. Lesions of diameter 2 mm, 4 mm, 6 mm, and 8 mm were embedded at depths of 12.7 mm, 25.4 mm, and 38.1 mm within the phantom background. To minimize coherence artifacts, the transducer frequency was swept continuously from 3.25 MHz to 3.45 MHz at a rate of 100 MHz/s. The transducer voltage was ramped from 0.1 V to 6.5 V to permit identification of the onset of the AO effect in the detector. An analysis of image quality was performed on 50 identically acquired images in which the contrast‐to‐noise ratio was determined for each lesion in the mean acquired image. Apparent lesion size was also computed as a function of distance from the AO detector. Results: The spatial resolution analysis revealed that lesion size in the mean acquired image increased linearly with lesion‐to‐detector distance. Extrapolation of the least squares regression lines for apparent lesion size versus lesion‐to‐detector distance to zero distance agreed well with the actual lesion sizes. The noise analysis demonstrated that a contrast‐to‐noise ratio of 13.1 could be obtained with the prototype system for the transducer settings and phantom properties considered. Conclusions: This investigation indicates the potential for incorporating a liquid crystal AO detector into a transmission ultrasound system for full‐field breast imaging.

Solid oxide fuel cells (SOFCs) with flat-tubular structure were successfully fabricated by ceramic wet processing. The SOFCs had three or four internal channels for fuel gas flow and were supported by the fuel electrode. The SOFCs were composed of 8 mol Y2O3-ZrO2 (YSZ) electrolyte, Ni-YSZ fuel electrode, and La0.8Sr0.2MnO3 air electrode. Fuel gas was uniformly supplied to fuel electrodes with fuel gas pipes made of a heat-resistant alloy. The SOFCs had an active area of 50 cm2 and were operated to achieve a maximum power density of 0.23 W/cm2 at 1000 °C. The effect of the fuel gas pipe on cell performance was recognized; the performance was twice as high as that of an SOFC without the fuel gas pipe. The performance of the SOFC with four channels was slightly higher than that with three channels. It also appeared that the performance of the SOFC with three channels decreased steeply with increasing fuel utilization.

In this Letter the authors introduce a wide-field transmission ultrasound approach to breast imaging based on the use of a large area acousto-optic (AO) sensor. Accompanied by a suitable acoustic source, such a detector could be mounted on a traditional mammography system and provide a mammographylike ultrasound projection image of the compressed breast in registration with the x-ray mammogram. The authors call the approach acoustography. The hope is that this additional information could improve the sensitivity and specificity of screening mammography. The AO sensor converts ultrasound directly into a visual image by virtue of the acousto-optic effect of the liquid crystal layer contained in the AO sensor. The image is captured with a digital video camera for processing, analysis, and storage. In this Letter, the authors perform a geometrical resolution analysis and also present images of a multimodality breast phantom imaged with both mammography and acoustography to demonstrate the feasibility of the approach. The geometric resolution analysis suggests that the technique could readily detect tumors of diameter of 3 mm using 8.5 MHz ultrasound, with smaller tumors detectable with higher frequency ultrasound, though depth penetration might then become a limiting factor. The preliminary phantom images show high contrast and compare favorably to digital mammograms of the same phantom. The authors have introduced and established, through phantom imaging, the feasibility of a full-field transmission ultrasound detector for breast imaging based on the use of a large area AO sensor. Of course variations in attenuation of connective, glandular, and fatty tissues will lead to images with more cluttered anatomical background than those of the phantom imaged here. Acoustic coupling to the mammographically compressed breast, particularly at the margins, will also have to be addressed.

We report a very simple and reliable method for making Self-Assembled Vertical Comb (SAVC) drive actuators by using the standard SOI bulk micro-machining processes. The initial angular offset of the movable combs is prepared by using the process stiction which occurs during drying process after sacrificial release. The optical scanner integrated with SAVC has shown good electrostatic scanning performance of over 1.0-degree static-rotation angle with a typical drive voltage of 20V without any in-use electromechanical failure.

This paper presents the results of a comparison study of three ultrasonic nondestructive evaluation (NDE) methods applied to polymer matrix composite (PMC) specimens subjected to impact damage. Samples mainly consisted of various thicknesses of graphite/epoxy coupon panels impacted with various energy levels. Traditional pulse-echo and through transmission ultrasonic c-scan techniques were applied to impacted samples and served as the basis for comparison. Specimens were then inspected using acoustography, a large field ultrasonic inspection technique that is analogous to real-time X-ray imaging. Acoustography utilizes a unique, wide area two-dimensional (2-D) detector, called an acousto-optic (AO) sensor, to directly convert ultrasound into visual images; much like an image intensifier in real-time radiography. Finally, a newly developed guided wave scanning system was utilized to inspect the same set of samples. This system uses two transducers in a pitch catch configuration to examine the total (multi-mode) ultrasonic response in its inspection analysis. Several time- and frequency-domain parameters are calculated from the ultrasonic guided wave signal at each scan location to form images. Results are presented for all of the methods demonstrating each technique's detection capabilities and highlighting their advantages and disadvantages.