Image registration techniques with multiresolution analysis in satellite oceanography

En aquest article es fa una descripció dels procediments realitzats per enregistrar dues imatges geomètricament, de forma automàtica, si es pren la primera com a imatge de referència. Es comparen els resultats obtinguts mitjançant tres mètodes. El primer mètode és el d’enregistrament clàssic en domini espacial maximitzant la correlació creuada (MCC)[1]. El segon mètode es basa en aplicar l’enregistrament MCC conjuntament amb un anàlisi multiescala a partir de transformades wavelet [2]. El tercer mètode és una variant de l’anterior que es situa a mig camí dels dos. Per cada un dels mètodes s’obté una estimació dels coeficients de la transformació que relaciona les dues imatges. A continuació es transforma per cada cas la segona imatge i es georeferencia respecte la primera. I per acabar es proposen unes mesures quantitatives que permeten discutir i comparar els resultats obtinguts amb cada mètode.

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1819-1820

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1817-1818

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1805-1813

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1821

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1823

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1825

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1827

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1835-1836

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1854-1855 (Tome 3 - 4, 2nd Series)

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1856-1857 (Tome 5 - 6, 2nd Series)

Mediation incomplete information bargaining with filtered communication

We analyze a continuous-time bilateral double auction in the presence of two-sided incomplete information and a smallest money unit. A distinguishing feature of our model is that intermediate concessions are not observable by the adversary: they are only communicated to a passive auctioneer. An alternative interpretation is that of mediated bargaining. We show that an equilibrium using only the extreme agreements always exists and display the necessary and sufficient condition for the existence of (perfect Bayesian) equilibra which yield intermediate agreements. For the symmetric case with uniform type distribution we numerically calculate the equilibria. We find that the equilibrium which does not use compromise agreements is the least efficient, however, the rest of the equilibria yield the lower social welfare the higher number of compromise agreements are used.

Organisational structure, communication and group ethics

This paper investigates experimentally how organisational decision processes affect the moral motivations of actors inside a firm that must forego profits to reduce harming a third party. In a "vertical" treatment, one insider unilaterally sets the harm-reduction strategy; the other can only accept or quit. In a "horizontal" treatment, the insiders decide by consensus. Our 2-by-2 design also controls for communication effects. In our data, communication makes vertical firms more ethical; voice appears to mitigate "responsibility-alleviation" in that subordinates with voice feel responsible for what their firms do. Vertical firms are then more ethical than the horizontal firms for which our bargaining data reveal a dynamic form of responsibility-alleviation and our chat data indicate a strong "insider-outsider" effect.

Communication, cultural identities and the Olympic Games: the Barcelona’92 experience

This document includes the results of the research undertaken by the author on the media planning and coverage of the Barcelona'92 and its cultural implications.