Now showing items 1-10 of 150
Model calculations of the dayside ionosphere of Venus
(Elsevier, 1981)
Model calculations of the dayside ionosphere of Venus are presented. The coupled continuity and momentum equations were solved for O2+, O+, CO2+, C+, N+, He+, and H+ density distributions, which are compared with measurements ...
Composition and origin of summertime air pollutants at Deep Creek Lake, Maryland
(Elsevier, 1989)
A 1 month intensive summertime field study conducted in rural western Maryland resulted in a comprehensive set of fine particle, gaseous and meteorological data. Sulfur in the assumed form of ammonium sulfate accounted for ...
The behavior of the high-latitude F-region neutral thermosphere in relation to IMF parameters
(Elsevier, 1992)
Ground based incoherent scatter radar (ISR) and Fabry Perot interferometer (FPI) studies in the northern high latitudes during the period 1983 to 1989 have shown that the F-region neutral wind field pattern depends upon ...
What Makes a Problem GP-Hard? Analysis of a Tunably Difficult Problem in Genetic Programming
(Kluwer Academic Publishers; Springer Science+Business Media, 2001-06)
This paper addresses the issue of what makes a problem genetic programming (GP)-hard by considering the binomial-3 problem. In the process, we discuss the efficacy of the metaphor of an adaptive fitness landscape to explain ...
Radiobrightness of Periodically Heated, Two-Phase Media
(University of Michigan. Radiation Laboratory, 1988-12)
The abundance of atomic 1 H, 4 He and 3 He in the local interstellar cloud from pickup ion observations with SWICS on Ulysses
(Kluwer Academic Publishers; Springer Science+Business Media, 1996-10)
Pickup ions measured deep inside the heliosphere open a new way to determine the absolute atomic density of a number of elements and isotopes in the local interstellar cloud (LIC). We derive the atomic abundance of hydrogen ...
Satellite observations of new particle and field signatures associated with SAR arc field lines at magnetospheric heights
(Elsevier, 1987)
Enhancements in thermal ion densities, an oxygen dominated ring current at energies below 17 kev, and invariant latitude-limited bands of intense ELF hiss have been discovered on Stable Auroral Red (SAR) arc field lines ...
Coupled Clouds and Chemistry of the Giant Planets— A Case for Multiprobes
(Kluwer Academic Publishers; Springer Science + Business Media, Inc., 2005-01)
In seeking to understand the formation of the giant planets and the origin of their atmospheres, the heavy element abundance in well-mixed atmosphere is key. However, clouds come in the way. Thus, composition and condensation ...