Particle Motion in Monopoles and Geodesics on Cones

The equations of motion of a charged particle in the field of Yang's $\mathrm{SU}(2)$ monopole in 5-dimensional Euclidean space are derived by applying the Kaluza-Klein formalism to the principal bundle $\mathbb{R}^8\setminus\{0\}\to\mathbb{R}^5\setminus\{0\}$ obtained by radially extending the Hopf fibration $S^7\to S^4$, and solved by elementary methods. The main result is that for every particle trajectory $\mathbf{r}:I\to\mathbb{R}^5\setminus\{0\}$, there is a 4-dimensional cone with vertex at the origin on which $\mathbf{r}$ is a geodesic. We give an explicit expression of the cone for any initial conditions

Multiple-Purpose Subsonic Naval Aircraft (MPSNA) Multiple Application Propfan Study (MAPS)

A conceptual design study compared a selected propfan-powered aircraft to a turbofan-powered aircraft for multiple Navy carrier-based support missions in the 1995 timeframe. Conventional takeoff and landing (CTOL) propfan and turbofan-powered designs and short takeoff/vertical landing (STOVL) propfan-powered designs are presented. Ten support mission profiles were defined and the aircraft were sized to be able to perform all ten missions. Emphasis was placed on efficient high altitude loiter for Airborne Early Warning (AEW) and low altitude high speed capability for various offensive and tactical support missions. The results of the study show that the propfan-powered designs have lighter gross weights, lower fuel fractions, and equal or greater performance capability than the turbofan-powered designs. Various sensitives were developed in the study, including the effect of using single-rotation versus counter-rotation propfans and the effect of AEW loiter altitude on vehicle gross weight and empty weight. A propfan technology development plan was presented which illustrates that the development of key components can be achieved without accelerated schedules through the extension of current and planned government and civil propfan programs

Pour une formation muséologique contextualisée à réinventer en permanence

Cadernos de SociomuseologiaN’ayant pas tout à fait saisi la portée et le sens du thème proposé pour la conférence “Une formation pour un musée universel”, dois-je comprendre qu’il devrait y avoir un seul modèle de formation pour l’ensemble des musées dans le monde ou bien que ceux-ci devraient refléter en premier lieu des préoccupations dites universelles? Partisan initiateur, militant et formateur de la nouvelle muséologie dans ses composantes sociales et de développement régional, s’appuyant sur les pratiques les plus évoluées de l’écomuséologie et de la démocratie culturelle, héritières de décennies d’action-recherche populaire autonome dans plusieurs régions du monde, je ne crois pas, si telle était la proposition, qu’il puisse y avoir un modèle universel de musée, ni une formation universelle desservant celui-ci

The inclusive process of training in social museology: alternative museology in action in Carapateira, Portugal

Cadernos de SociomuseologiaPierre Mayrand is a long-time member of ICTOP and founder of MINOM. He did graduate studies in Montreal and overseas, studying art history with a specialization in architecture and urban planning. In 1970, when the Université du Québec was founded, Pierre entered the teaching profession, participating (as director, professor, and researcher) in the setting up of programs in national heritage, museology and cultural development. He is still active in teaching and project development now as a altermuseologist