Bøger af Bertin

These three volumes entitled Advances in Hypersonics contain the Proceedings of the Second and Third Joint US/Europe Short Course in Hypersonics which took place in Colorado Springs and Aachen. The Second Course was organized at the US Air Force Academy, USA in January 1989 and the Third Course at Aachen, Germany in October 1990. The main idea of these Courses was to present to chemists, com- puter scientists, engineers, experimentalists, mathematicians, and physicists state of the art lectures in scientific and technical dis- ciplines including mathematical modeling, computational methods, and experimental measurements necessary to define the aerothermo- dynamic environments for space vehicles such as the US Orbiter or the European Hermes flying at hypersonic speeds. The subjects can be grouped into the following areas: Phys- ical environments, configuration requirements, propulsion systems (including airbreathing systems), experimental methods for external and internal flow, theoretical and numerical methods. Since hyper- sonic flight requires highly integrated systems, the Short Courses not only aimed to give in-depth analysis of hypersonic research and technology but also tried to broaden the view of attendees to give them the ability to understand the complex problem of hypersonic flight. Most of the participants in the Short Courses prepared a docu- ment based on their presentation for reproduction in the three vol- umes. Some authors spent considerable time and energy going well beyond their oral presentation to provide a quality assessment of the state of the art in their area of expertise as of 1989 and 1991.

Instruction sur la culture des abeilles... par M. Bertin, ...Date de l'édition originale: 1836Le présent ouvrage s'inscrit dans une politique de conservation patrimoniale des ouvrages de la littérature Française mise en place avec la BNF. HACHETTE LIVRE et la BNF proposent ainsi un catalogue de titres indisponibles, la BNF ayant numérisé ces oeuvres et HACHETTE LIVRE les imprimant à la demande. Certains de ces ouvrages reflètent des courants de pensée caractéristiques de leur époque, mais qui seraient aujourd'hui jugés condamnables. Ils n'en appartiennent pas moins à l'histoire des idées en France et sont susceptibles de présenter un intérêt scientifique ou historique. Le sens de notre démarche éditoriale consiste ainsi à permettre l'accès à ces oeuvres sans pour autant que nous en cautionnions en aucune façon le contenu. Pour plus d'informations, rendez-vous sur www.hachettebnf.fr

Configurations that have a relatively high ballistic coefficient (such as slender reentry vehicles) and reenter the atmosphere at relatively high angles of attack experience severe heating rates and high dynamic pressures, but only for a short period of time.