The impact of survey length, interactivity and participant involvement on intentions and satisfaction across multiple panels

This study examines how survey design characteristics impact on participant satisfaction, future intentions to complete surveys, and intention to recommend the survey to others, based on panel members, extracted from three different panels, who randomly received one out of eight developed surveys, varying length, involvement and interactivity. The experiment was designed for an Australian industry client. The multivariate analysis of covariance (MANCOVA hereafter) results suggest that there are differences based on the panels used, and longer surveys are viewed more positively. Interaction occurs between panels and involvement, but other two way interaction effects are insignificant. Implications for survey design and future research are discussed.<br /

In vitro and in vivo assessement of the antimalarial activity of sergeolide

L'activité antiplasmodiale, in vitro, in vivo du Sergeolide, Quassinoide isolé de #Picrolemma pseudocoffea a été mesurée, in vitro, sur des cultures de #Plasmodium faliciparum et in vivo par le test classique de la mesure de l'activité schizonticide sur le paludisme du rongeur, à #Plasmodium berghei. Le sergeolide manifeste une forte activité antiplasmodiale, aussi bien in vitro que in vivo, à des doses extrêmement faibles. Une concentration de 0,006 microg/ml inhibe complètement la croissance des cultures de diverses souches de #Plasmodium faliciparum, sensibles et résistantes à la choroquine. Une dose de 0,26 mg/kg/j réduit considérablement la virulence du paludisme à #Plasmodium berghei$ chez la souris. Cependant, la forte toxicité du sergeolide (DL50 : 1,8 mg/kg) limite l'intérêt de ce composé dans le traitement curatif du paludisme. (Résumé d'auteur

The strong coupling, unification, and recent data

The prediction of the strong coupling assuming (supersymmetric) coupling constant unification is reexamined. We find, using the new electroweak data, $\alpha_{s}(M_{Z}) \approx 0.129 \pm 0.010$. The implications of the large $\alpha_{s}$ value are discussed. The role played by the $Z$ beauty width is stressed. It is also emphasized that high-energy (but not low-energy) corrections could significantly diminish the prediction. However, unless higher-dimension operators are assumed to be suppressed, at present one cannot place strong constraints on the super-heavy spectrum. Non-leading electroweak threshold corrections are also discussed.Comment: 12 pages, LaTex + RevTex, uuencoded postscript file (including 13 figures) is attached. Also available at ftp://dept.physics.upenn.edu/pub/Ni