On the voting power of an alliance and the subsequent power of its members

Even, and in fact chiefly, if two or more players in a voting game have on a binary issue independent opinions, they may have interest to form a single voting alliance giving an average gain of influence for all of them. Here, assuming the usual independence of votes, we first study the alliance voting power and obtain new results in the so-called asymptotic limit for which the number of players is large enough and the alliance weight remains a small fraction of the total of the weights. Then, we propose to replace the voting game inside the alliance by a random game which allows new possibilities. The validity of the asymptotic limit and the possibility of new alliances are examined by considering the decision process in the Council of Ministers of the European Union.

Persistence of collective fluctuations in N body metaequilibrium gravitationnal and plasma systems

The object of this research commanded by the European Community was to understand the mechanisms and the efficiency of the discourses of prevention both explicit (officials campaigns toward the public) and others type of discourses which are broadcasted to inform people through the mass media in order to form professionals of health care. During several years it is realy an instrumentation of TV programs which appears bringing cognitive contributions and sharing emotionnals ressources with the TV audience. Rather than the objective discourse of information brought by the classical TV journalism, an other type of speech mixing testimony and private advices has taken place, and apparently with more success. ß The turning point in public opinion of the scandal and a real change in the way to see the disease and the people. The event is amplified and the plight is constructed as nearer. It is no more the disease of other people (homosexual, toxicomane

Persistence of collective fluctuations in N body metaequilibrium gravitationnal and plasma systems

The object of this research commanded by the European Community was to understand the mechanisms and the efficiency of the discourses of prevention both explicit (officials campaigns toward the public) and others type of discourses which are broadcasted to inform people through the mass media in order to form professionals of health care. During several years it is realy an instrumentation of TV programs which appears bringing cognitive contributions and sharing emotionnals ressources with the TV audience. Rather than the objective discourse of information brought by the classical TV journalism, an other type of speech mixing testimony and private advices has taken place, and apparently with more success. ß The turning point in public opinion of the scandal and a real change in the way to see the disease and the people. The event is amplified and the plight is constructed as nearer. It is no more the disease of other people (homosexual, toxicomane

« Virial » pressure of the classical one-component plasma

Application of the virial theorem to a Coulomb system of N particles neutralized by a continuous background, leads quite naturally to the definition of a « virial » kinetic pressure for the system of particles, which is fundamentally positive. This definition is related, in a particular case, to the thermodynamic one used in previous works, which has the drawback to give negative values for sufficiently strong coupling.En appliquant le théorème du viriel à un système coulombien de N particules neutralisées par un fond continu, on définit très naturellement une pression cinétique « virielle » du système de particules, qui est une quantité essentiellement positive. Le lien est fait, dans un cas particulier, avec la définition thermodynamique de la pression utilisée dans les travaux précédents, qui a l'inconvénient de donner des valeurs négatives quand le paramètre de couplage est suffisamment grand