6th sense system augmented reality chemical plant supervision system

This project aims at the realization of a wearable supervision system for chemical installations based on the augmented reality paradigm. Augmented reality improves the perception the operator has of his surrounding environment by overlaying real-time computer-generated images onto the real world. This document describes the work realized from the beginning of this year. The first step was to implement a simplified version of the system to show that such a system is feasible and usable for the supervision of chemical plants. This was done in the prototype α1, which was released in April 2004. Based on knowledge acquired during the design and the implementation of the first simplified prototype called α1, a complete and better version of the system, the prototype α2, is currently being developed

Les représentations d’élèves de 6 à 12 ans face aux métiers connotés en genre

La recherche suivante s’intéresse aux représentations qu’ont les élèves de 6 à 12 ans face aux stéréotypes de genre dans les différentes professions. Les participants à cette étude sont des élèves de trois classes de degrés différents, soit des 3H, 5H et 8H. Des entretiens basés selon un même protocole ont été menés auprès de 14 filles et 12 garçons. Bien que cette recherche soit qualitative, il a été nécessaire d’interroger un nombre important de sujets afin d’obtenir des résultats significatifs. Les données récoltées et présentées ont permis de constater que la majorité des élèves sont influencés par les stéréotypes de genre. Plus l’enfant est âgé, plus sa façon de penser est impactée par ces derniers. Il est également notable que quelques élèves de 8H acquièrent progressivement une conscience de ces stéréotypes. En tant que futures enseignantes, il est important de comprendre ce phénomène et d’adapter ses pratiques. En limitant ces influences, les élèves pourront orienter leurs choix plus librement, selon leurs attraits et passions et non selon les préjugés de la société

Le ski de randonnée se fait une place dans les stations de ski: étude de la première année d'ouverture du Rando Parc de Crans-Montana : bilan et pistes d'amélioration

Le ski de randonnée connait une hausse du nombre de ses adeptes. Il suit la même tendance que son cousin estival : le Trail Running. Ce sport, qui était auparavant réservé aux montagnards, est aujourd’hui pratiqué par un grand nombre de personnes. Ces nouveaux pratiquants ont une approche différente de celle de la pratique de la montagne. Elles voient en ce sport un moyen de faire de l’exercice, de profiter de la nature, de se faire du bien et de se maintenir en forme avant de rechercher la difficulté technique en montagne

Gouvernance informationnelle et empreinte écologique des données numériques

oai:bibnum.enssib.fr:71041Il s\u27agit d\u27un rapport de recherche publié par la Haute école de gestion de Genève. La problématique écologique est au coeur de nombreux débats, mais malheureusement encore peu mise en avant dans le domaine du numérique, a fortiori dans l’administration publique. Lorsque l’on aborde la notion d’impact environnemental du numérique, on touche alors à l’ensemble des effets sur l’environnement des nouvelles technologies (information et communication). La célèbre organisation internationale Greenpeace (sans date) définit la pollution numérique comme l’ensemble des formes de pollution engendrées par le secteur informatique de l’émission de gaz à effet de serre en passant par la contamination chimique ou la production de déchets électroniques. Pour des raisons de faisabilité, cette recherche se concentre sur un aspect spécifique de l’empreinte écologique du numérique : celle des données numériques tout au long de leur cycle de vie

Reducing effective dose to a paediatric phantom by using different combinations of kVp, mAs and additional filtration whilst maintaining image quality

Purpose: To determine whether using different combinations of kVp and mAs with additional filtration can reduce the effective dose to a paediatric phantom whilst maintaining diagnostic image quality. Methods: 27 images of a paediatric AP pelvis phantom were acquired with different kVp, mAs and additional copper filtration. Images were displayed on quality controlled monitors with dimmed lighting. Ten diagnostic radiographers (5 students and 5 experienced radiographers) had eye tests to assess visual acuity before rating the images. Each image was rated for visual image quality against a reference image using 2 alternative forced choice software using a 5-point Likert scale. Physical measures (SNR and CNR) were also taken to assess image quality. Results: Of the 27 images rated, 13 of them were of acceptable image quality and had a dose lower than the image with standard acquisition parameters. Two were produced without filtration, 6 with 0.1mm and 5 with 0.2mm copper filtration. Statistical analysis found that the inter-rater and intra-rater reliability was high. Discussion: It is possible to obtain an image of acceptable image quality with a dose that is lower than published guidelines. There are some areas of the study that could be improved. These include using a wider range of kVp and mAs to give an exact set of parameters to use. Conclusion: Additional filtration has been identified as amajor tool for reducing effective dose whilst maintaining acceptable image quality in a 5 year old phantom

Review article – A narrative review on the reduction of effective dose to a paediatric patient by using different combinations of kVp, mAs and additional filtration whilst maintaining image quality

This paper reviews the literature for lowering of dose to paediatric patients through use of exposure factors and additional filtration. Dose reference levels set by The International Commission on Radiological Protection (ICRP) will be considered. Guidance was put in place in 1996 requires updating to come into line with modern imaging equipment. There is a wide range of literature that specifies that grids should not be used on paediatric patients. Although much of the literature advocates additional filtration, contrasting views on the relative benefits of using aluminium or copper filtration, and their effects on dose reduction and image quality can vary. Changing kVp and mAs has an effect on the dose to the patient and image quality. Collimation protects adjacent structures whilst reducing scattered radiation

Experimental article – Reducing effective dose to a paediatric phantom by using different combinations of kVp, mAs and additional filtration whilst maintaining image quality

Purpose: To determine whether using different combinations of kVp and mAs with additional filtration can reduce the effective dose to a paediatric phantom whilst maintaining diagnostic image quality. Methods: 27 images of a paediatric AP pelvis phantom were acquired with different kVp, mAs and additional copper filtration. Images were displayed on quality controlled monitors with dimmed lighting. Ten diagnostic radiographers (5 students and 5 experienced radiographers) had eye tests to assess visual acuity before rating the images. Each image was rated for visual image quality against a reference image using 2 alternative forced choice software using a 5-point Likert scale. Physical measures (SNR and CNR) were also taken to assess image quality. Results: Of the 27 images rated, 13 of them were of acceptable image quality and had a dose lower than the image with standard acquisition parameters. Two were produced without filtration, 6 with 0.1mm and 5 with 0.2mm copper filtration. Statistical analysis found that the inter-rater and intra-rater reliability was high. Discussion: It is possible to obtain an image of acceptable image quality with a dose that is lower than published guidelines. There are some areas of the study that could be improved. These include using a wider range of kVp and mAs to give an exact set of parameters to use. Conclusion: Additional filtration has been identified as amajor tool for reducing effective dose whilst maintaining acceptable image quality in a 5 year old phantom