Catálogo de publicaciones - revistas

<jats:p>A number of key problems in atmospheric chemistry are shaped by the strength and character of the various mechanisms acting to move and mix air in the upper troposphere. These transport processes are examined from a mechanistic perspective, with primary emphasis on the tropopause and middle-troposphere regions in the extratropics. The roles of vertical and horizontal transport “barriers” are explored, including the processes by which such barriers are created and are overcome. These transport considerations lead to a hypothesis concerning the processes that shape the tropopause itself. Some perspectives are offered on the still immature subject of transport in the upper troposphere of the tropics.</jats:p>

<jats:p>The role of atmospheric science in the provision of public services and the formulation of public policy is going through a period of reappraisal. One of the most fundamental issues at stake is the continued free and unrestricted international exchange of meteorological data in support of operational meteorology and research. The contribution of atmospheric research to the resolution of complex issues associated with the international response to the threat of global climate change has become a matter of vigorous debate in the meteorological community but has also contributed to increasingly close cooperation between meteorology and the rest of the earth science community.</jats:p>

<jats:p> <jats:bold>The Inflationary Universe.</jats:bold> The Quest for a New Theory of Cosmic Origins. ALAN H. GUTH. Helix (Addison-Wesley), Reading, MA, 1997. xviii, 358 pp., illus. $25 or C$33.95. ISBN 0-201-14942-7. </jats:p>

<jats:p> <jats:bold>Good Natured.</jats:bold> The Origins of Right and Wrong in Humans and Other Animals. FRANS DE WAAL. Harvard University Press, Cambridge, MA, 1996. viii, 296 pp., illus., + plates. $24.95 or £16.50. ISBN 0-674-35660-8. </jats:p>

<jats:p>An approach to solving continuous global optimization problems was developed. It builds on two innovative concepts, subenergy tunneling and non-Lipschitzian terminal repellers, to ensure escape from local minima in a fast, reliable, and computationally efficient manner. The generally applicable methodology is embodied in the TRUST (terminal repeller unconstrained subenergy tunneling) algorithm, which is deterministic, scalable, and easy to implement. Benchmark results show that TRUST is faster and more accurate than previously reported global optimization techniques. An application of TRUST to a large-scale exploratory seismology problem of substantial computational complexity (that is, residual statics corrections) is also reported.</jats:p>

<jats:p>A saturated nickel-like samarium x-ray laser beam at 7 nanometers has been demonstrated with an output energy of 0.3 millijoule in 50-picosecond pulses, demonstrating that saturated operation of a laser at wavelengths shorter than 10 nanometers can be achieved. The narrow divergence, short wavelength, short pulse duration, high efficiency, and high brightness of this samarium laser make it an ideal candidate for many x-ray laser applications.</jats:p>