312 research outputs found
A GLOBAL MODEL OF CLIMATE CHANGE IMPACTS ON TIMBER MARKETS
Several papers have now estimated the impact of climate change on national timber markets, but few studies have measured impacts globally. Further, the literature on impacts has focused heavily on changes in productivity and has not integrated movements of biomes as well. Here, a dynamic model of ecological change and economic change is developed to capture the impact of climate change on world timber markets. Climate change is predicted to increase global timber production as producers in low-mid latitude forests react quickly with more productive short-rotation plantations, driving down timber prices. Producers in mid-high latitude forests, in contrast, are likely to be hurt by the lower prices, dieback, and slower productivity increases because of long-rotation species. Consumers in all regions benefit from the lower prices, and the overall impacts of climate change in timber markets are expected to be beneficial, increasing welfare in those markets from 2% to 8%.Resource /Energy Economics and Policy,
Wind-tunnel Investigation of the Boundary Layer and Wake and Their Relation to Airfoil Characteristics.naca 65(sub 1)-012 Airfoil with a True Contour Flap and a Beveled-trailing-edge Flap
Comparison Between the Measured and Theoretical Span Loadings on a Moderately Swept-forward and a Moderately Swept-back Semispan Wing
Effect of the tunnel-wall boundary layer on test results of a wing protruding from a tunnel wall
Histoire des " Big Five " : OCEAN des cinq grands facteurs de la personnalité. Introduction du Big Five Inventory français ou BFI-FR
International audienceLa description de la personnalité a été conçue à partir d'une variété de points de vue théoriques et à différents niveaux d'abstraction. Dans l'étude de la personnalité, l'unité la plus fréquemment utilisée pour mesurer les différences individuelles a été le trait. Un consensus semble se dégager actuellement sur une taxonomie générale des traits de la personnalité, les cinq facteurs de la personnalité, connus sous le nom des " Big Five ", expression introduite par Goldberg. Le but de cet article est de resituer l'élaboration de la version originale du Big Five Inventory (BFI) de John, Donahue et Kentle (1991) dans son histoire, et parmi les autres tests disponibles le " TDA ou trait descriptive adjective " de Goldberg et le " NEO PI-R ou NEO personality inventory revised " de Costa et McCrae. La revue reprend les différents stades de conceptualisation des catégories qui furent élaborées à partir d'une sélection d'adjectifs de dictionnaires permettant de différencier un individu d'un autre. Seuls les traits seront utilisés pour l'élaboration des trois tests mentionnés. Les " Big Five " retrouvés à partir d'analyses factorielles peuvent se résumer en cinq facteurs réplicables connus sous le nom de OCEAN ou CANOE de la personnalité, moyen mnémotechnique pour E (Extraversion, Énergie, Enthousiasme) ; A (Agréabilité, Altruisme, Affection) ; C (Conscience, Contrôle, Contrainte) ; N (Émotions Négatives, Névrosisme, Nervosité) ; O (Ouverture, Originalité, Ouverture d'esprit), ordre établi par les auteurs du BFI. La structure des " Big Five " regroupe à un haut niveau d'abstraction les points communs de la plupart des systèmes existant sur la description de la personnalité et met à disposition un modèle descriptif intégré pour des recherches sur la personnalité
Protein kinase G I alpha activates an anti-remodeling signaling pathway in the heart via an interaction with the MAPKKK mixed lineage kinase 3
Usefulness of the bidirectional Glenn procedure as staged reconstruction for the functional single ventricle
The bidirectional Glenn operation may be particularly useful as an intermediate procedure before Fontan correction in high-risk patients. From October 1989 through February 1992, 50 patients 1 to 60 months old (median 12) have undergone a bidirectional Glenn operation. Diagnoses included hypoplastic left heart syndrome in 21 patients, pulmonary atresia with intact ventricular septum in 10, tricuspid valve atresia in 9, other complex univentricular heart defects in 9, and Ebstein's anomaly in 1. Mean pulmonary vascular resistance was 2.2 +/- 0.2 Wood U (range 0.5 to 7.3) and mean pulmonary artery area Nakata index was 318 +/- mm2/m2 (range 80 to 821). Additional procedures were performed in 17 patients, including pulmonary artery reconstruction in 15 (29%) and bilateral caval anastomoses in 5 (10%). There were 4 hospital deaths (8%). Two deaths resulted from myocardial infarction in patients with pulmonary atresia with intact ventricular septum and sinusoids and 1 from severe pulmonary vascular disease in a patient with hypoplastic left heart syndrome. There was 1 late death from pneumonia. Actuarial survival is 92 +/- 4% at 1 month and beyond, with a mean follow-up of 13.4 +/- 1 months. Risk factor analysis showed that pulmonary vascular resistance >3 Wood U and pulmonary artery distortion were associated with increased mortality. Twelve patients have undergone a Fontan procedure at a mean duration after bidirectional Glenn of 18 months with 1 death (8%). The bidirectional Glenn procedure provides excellent palliation in high-risk patients and appears useful as a staging procedure before Fontan correction.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/30841/1/0000503.pd
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