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A Furi-Pera theorem in Hausdorff topological spaces for acyclic maps
We present new Furi-Pera theorems for acyclic maps between topological spaces.
Annotated bibliography of the Florida applesnail, Pomacea paludosa (Say) (Gastropoda: Ampullariidae), from 1824 to 1999
The Florida applesnail, Pomacea paludosa (Say, 1829), inhabits freshwater rivers, lakes, and wetlands of the southeastern United States and Cuba, where it is prey to several species of birds, reptiles, and fish, particularly ...
Spectral properties of heavy ions associated with the passage of interplanetary shocks at 1 AU
We have surveyed the energy spectra of ∼0.1-100 MeV nucleonˉ¹ C, O, and Fe nuclei associated with the passage of 72 interplanetary (IP) shocks observed on board the ACE spacecraft during the period 1997 October-2002 October. ...
Spectroscopic and photometric analysis of HS 1136+6646: A hot young DAO+K7 V post-common-envelope, pre-cataclysmic variable binary
Extensive photometric and spectroscopic observations have been obtained for HS 1136+6646. The observations reveal a newly formed post–common-envelope binary system containing a hot ~DAO.5 primary and a highly irradiated ...
Nonlinear parallel and perpendicular diffusion of charged cosmic rays in weak turbulence
The problem of particle transport perpendicular to a magnetic background field is well known in cosmic-ray astrophysics. Whereas it is widely accepted that quasi-linear theory (QLT) of particle transport does not provide ...
The nonlinear coupling of electromagnetic ion cyclotron and lower hybrid waves in the ring current region: the magnetic storm 1–7 May 1998
The excitation of lower hybrid waves (LHWs) is a widely discussed mechanism of interaction between plasma species in space, and is one of the unresolved questions of magnetospheric multi-ion plasmas. In this paper we ...
Observations of the pulsating white dwarf G 185-32
We observed the pulsating hydrogen atmosphere white dwarf G 185-32 with the Whole Earth Telescope in 1992. We report on a weighted Fourier transform of the data detecting 18 periodicities in its light curve. Using the ...
Nonlinear guiding center theory of perpendicular diffusion: General properties and comparison with observation
A nonlinear guiding center (NLGC) theory for diffusion of charged particles perpendicular to the mean magnetic field was recently proposed. Here, we draw attention to a number of attractive features of this theory: (1) The ...
Abundances of heavy and ultraheavy ions in ³He-rich solar flares
We have surveyed ³He-rich solar energetic particle (SEP) events over the period 1997 September-2003 April in order to characterize abundances of heavy ions near 400 keV nucleonˉ¹. The first part of the study focuses on 20 ...
Interplanetary transport mechanisms of solar energetic particles
Numerical simulations of charged particle trajectories in a Parker field with model turbulence are used to study the transport mechanisms of solar energetic particles (SEPs): magnetic focusing, pitch-angle diffusive transport ...