17 research outputs found
929-63 Dobutamine Stress Cine Magnetic Resonance Imaging versus PET for Detection of Myocardial Viability
To identify viable myocardium before coronary revascularization, we prospectively submitted eleven patients (60±7 yrs; 11 M) with previous Q-wave myocardial infarction to 18FDG-Positon Emission Tomography and low-dose (5 to 10 ÎŒg/kg/min) dobutamine cine-MRI. 18FDG uptake > 60% was considered indicative of viable tissue. Ouantitation of systolic wall thickening/thinning (SW) was performed by use of a computer software allowing automatic detection of epicardial and endocardial outlines, at rest and under 5, 7.5 and 10 ÎŒg/kg/min of dobutamine. Heart slices of both 18FDG-PET scans and dobutamine cine-MRI were divided in 8 segments, matched and analyzed byobservers blinded to clinical data. Sixty-five segments were considered viable by 18FDG-PET; in this subgroup, rest SW thickening averaged 47±5% and improved by 43±8% under low-dose dobutamine. In the remaining 23 segments considered non viable by PET. rest SW thickening averaged 14±7%*(*p<0.05 vs viable segment group) and further worsened by â13±8%*during low-dose dobutamine stress (*p<0.05 versus viable segment group). Positive predictive value of low-dose dobutamine stress cine-MRI for assessment of myocardial viability was 84%. These data suggest that quantitative assessment of regional wall motion by dobutamine cine-MRI may help discriminate viable from non viable myocardium as defined by 18FDG-Positon Emission Tomography
How does management affect soil C sequestration and greenhouse gas fluxes in boreal and temperate forests? : A review
Acknowledgements This review has been supported by the grant Holistic management practices, modelling and monitoring for European forest soils â HoliSoils (EU Horizon 2020 Grant Agreement No 101000289) and the Academy of Finland Fellow project (330136, B. Adamczyk). In addition to the HoliSoils consortium partners, Dr. Abramoff contributed on this study and her work was supported by the United States Department of Energy, Office of Science, Office of Biological and Environmental Research. Oak Ridge National Laboratory is managed by UT-Battelle, LLC, for the United States Department of Energy under contract DE-AC05-00OR22725.Peer reviewedPublisher PD
Place-Based Learning Communities on a Rural Campus: Turning Challenges into Assets
At Humboldt State University (HSU), location is everything. Students are as drawn to our spectacular natural setting as they are to the unique majors in the natural resource sciences that the university has to offer. However, the isolation that nurtures the pristine natural beauty of the area presents a difficult reality for students who are accustomed to more densely populated environments. With the large majority of our incoming students coming from distant cities, we set out to cultivate a âhome away from homeâ by connecting first-year students majoring in science, technology, engineering and math (STEM) to the communities and local environment of Humboldt County. To achieve this, we designed first-year place-based learning communities (PBLCs) that integrate unique aspects and interdisciplinary themes of our location throughout multiple high impact practices, including a summer experience, blocked-enrolled courses, and a first-year experience course entitled Science 100: Becoming a STEM Professional in the 21st Century. Native American culture, traditional ways of knowing, and contemporary issues faced by tribal communities are central features of our place-based curriculum because HSU is located on the ancestral land of the Wiyot people and the university services nine federally recognized American Indian tribes. Our intention is that by providing a cross-cultural, validating environment, students will: feel and be better supported in their academic pursuits; cultivate values of personal, professional and social responsibility; and increase the likelihood that they will complete their HSU degree. As we complete the fourth year of implementation, we aim to harness our experience and reflection to improve our programming and enable promising early results to be sustained
"Dessine-moi un bonhomme joyeux" (marquage graphique des Ă©motions basiques chez l'enfant)
L objectif de ce travail est de déterminer la nature des relations, d une part entre le dessin expressif et le dessin représentationnel et d autre part, entre le dessin expressif et la conceptualisation des émotions chez l enfant. Pour ce faire, nous menons deux études auprÚs d enfants ùgés de 5 à 11 ans. Nous proposons aux enfants de dessiner un personnage exprimant des émotions basiques (joie, tristesse, colÚre, surprise, peur, dégoût). Nous analysons les dessins en termes d expressivité émotionnelle et de contenu graphique (catégories et types d indices, nombre d indices, type de marquage). Dans une optique comparative, nous demandons également aux enfants d identifier et de verbaliser ces émotions basiques à partir de scénarios émotionnels. Les résultats indiquent un net parallÚle entre les capacités à verbaliser et à marquer graphiquement les émotions basiques chez l enfant. Le nombre de dessins expressifs est fonction de l ùge du dessinateur et de l émotion évoquée. Le contenu des dessins révÚle l utilisation d indices graphiques faciaux, posturaux et contextuels afin de marquer l émotion. Les indices faciaux sont trÚs fréquemment utilisés seuls (marquage facial), et parfois combinés à des indices contextuels (marquage facial-contexte). Les résultats suggÚrent une interdépendance entre le dessin expressif et le dessin représentationnel, qui se développeraient conjointement et puiseraient leurs signifiants graphiques au sein d un répertoire commun. Ces résultats nous amÚnent également à conclure que la capacité à dessiner de maniÚre expressive est étroitement liée au développement de la conceptualisation des émotions chez l enfant. Cette interprétation nous conduit à proposer de plus amples investigations.The aim of this thesis work is to investigate the relationships, first between expressive and representational drawing, and then between expressive drawing and children s conceptualization of emotions. Two studies with children from 5 to 11 years old are conducted for this purpose. The children are asked to draw a human figure who displays basic emotions (happiness, sadness, anger, surprise, fear, disgust). The drawings are analyzed in terms both of their emotional expressivity and of their content (types and number of graphic cues, types of depictions). The children are also asked to freely label basic emotions from emotional scenarios. Results show that there is a strong link between children s ability to label and then to depict basic emotions. The number of expressive drawings depends both on the drawer s age and on the emotion being depicted. The drawings content reveals the use of facial, postural and contextual cues to depict emotions. The facial cues are mostly produced alone (facial depiction) and sometimes with contextual cues (facial-contextual depiction). The results suggest interdependency between expressive drawing and representational drawing. We consider that those two aspects of graphic abilities develop jointly and draw their graphic cues within a common repertoire. The results also lead us to think that children s ability to draw expressively is strongly linked to their conceptualization of emotions. This assertion calls for further, in-depth research.MONTPELLIER-BU Lettres (341722103) / SudocSudocFranceF
Arts de l'enfance, enfances de l'art
Dans sa poursuite des Ă©trangetĂ©s qui dĂ©paysent, lâart moderne nâa cessĂ© de faire bouger ses frontiĂšres en incluant « lâautre de lâart » dans son espace. Ce que les historiens de lâart ont nommĂ© « primitivisme » dĂ©signe ce mouvement qui sâĂ©panouit au dĂ©but du XXe siĂšcle. Or, dĂ©s le romantisme, lâaltĂ©ritĂ© exotique a Ă©tĂ© confrontĂ©e Ă une autre, celle quâincarne lâenfant auprĂšs de nous et en chacun de nous. Le court-circuit a eu lieu vers 1845, Ă Paris, sous lâĂ©gide de George Sand, de Champfleury et de Baudelaire. Il marquera de Corot Ă Picasso, de Courbet Ă Kandinsky, de Paul Klee Ă Joan MirĂł une longue pĂ©riode de la crĂ©ation plastique. LâĂ©quivalence, dĂ©jĂ posĂ©e par les artistes, entre les productions de lâenfant et celles du primitif, lâun et lâautre dĂ©tenteurs des « lignes Ă©lĂ©mentaires », rencontre lâidĂ©e de quelques biologistes qui perçoivent dans la croissance du petit humain la rĂ©capitulation accĂ©lĂ©rĂ©e de lâhistoire de notre espĂšce. Lâhorizon qui sâouvre est fascinant : lâart des enfants est-il un reflet de lâenfance de lâart ? Les savants â psychologues, prĂ©historiens, anthropologues â prennent alors le relais des artistes. Ils abandonneront bientĂŽt lâidĂ©e dâune pure et simple Ă©quivalence pour scruter une Ă©nigme qui nâest toujours pas refermĂ©e : pourquoi, de par le monde, les productions des enfants se ressemblent et comment en viennent-ils Ă exprimer les diffĂ©rentes cultures graphiques et plastiques dans lesquelles ils sont Ă©levĂ©s ? Les ethnologues des annĂ©es 1930 (Griaule, Evans-Pritchard, LĂ©vi-Strauss, ThĂ©rĂšse RiviĂšre) se souviennent de ces questions et savent solliciter ce que les enfants font de leurs mains. Sans doute les points de vue de lâartiste et du savant se distinguent â retrouver lâenfance nâest pas Ă©tudier lâenfant â mais les moyens quâils utilisent â lâenquĂȘte, la collection et lâexposition â sont identiques et suscitent souvent leur mutuelle curiositĂ©. Aujourdâhui, « lâart des enfants » est devenu une catĂ©gorie Ă part, isolĂ©e dans son monde, tout absorbĂ©e par la pĂ©dagogie ; ce numĂ©ro voudrait rappeler combien il fut, pendant un long demi-siĂšcle, un des foyers vivants oĂč crĂ©ation esthĂ©tique et rĂ©flexion anthropologique se passaient rĂ©ciproquement le relais. Acheter ce numĂ©ro en lign