## Search

Now showing items 1-10 of 19

#### The Kolmogorov equation with time-measurable coefficients

(2003-07-13)

Using both probabilistic and classical analytic techniques, we investigate the parabolic Kolmogorov equation
$$
L_t v +\frac {\partial v}{\partial t}\equiv \frac 12 a^{ij}(t)v_{x^ix^j}
+b^i(t) v_{x^i} -c(t) v+ f(t) ...

#### Elemental Fractionation in Small Solar Energetic Particle Events

(2003-09-01)

Using the Solar Isotope Spectrometer on the Advanced Composition Explorer (ACE), we have measured the 11.0-21.8 MeV nucleon-1 heavy (Z ≥ 6) element abundances of 39 small solar energetic particle (SEP) events that occurred ...

#### Evidence for a suprathermal seed population of heavy ions accelerated by interplanetary shocks near 1 AU

(2003-05-10)

We have surveyed the 0.1-10 MeV nucleonˉ¹ elemental abundances at 72 interplanetary (IP) shocks observed by the Ultra-Low-Energy Isotope Spectrometer on board the Advanced Composition Explorer from 1997 October through ...

#### Nonlinear collisionless perpendicular diffusion of charged particles

(2003-06-10)

A nonlinear theory of the perpendicular diffusion of charged particles is presented, including the influence of parallel scattering and dynamical turbulence. The theory shows encouraging agreement with numerical simulations.

#### Constraining the evolution of ZZ Ceti

(2003-09-10)

We report our analysis of the stability of pulsation periods in the DAV star (pulsating hydrogen atmosphere white dwarf) ZZ Ceti, also called R548. On the basis of observations that span 31 years, we conclude that the ...

#### PKS 0736+017: A striking optical flare and intriguing microvariability

(2003-07)

The compact, flat-spectrum radio quasar PKS 0736+017 was monitored for microvariability on 10 nights in early 2002 using the 0.9 m SARA telescope on Kitt Peak in Arizona. On January 14, PKS 0736+017 flared dramatically, ...

#### The everchanging pulsating white dwarf GD358

(2003-04)

We report 323 hours of nearly uninterrupted time series photometric observations of the DBV star GD 358 acquired with the Whole Earth Telescope (WET) during May 23rd to June 8th, 2000. We acquired more than 232 000 independent ...

#### Random fixed point theory in spaces with two metrics

(2003)

We present new random fixed point theorems in spaces with two metrics. Our results extend recent results of Tan and Yuan [10] and Xu [11].

#### Common fixed point theorems for a pair of countably condensing mappings in ordered Banach spaces

(2003)

In this paper some common fixed point theorems for a pair of multivalued weakly isotone mappings on an ordered Banach space are proved.

#### Multisite observations of the PMS δ Scuti star V351 Ori

(2003-09)

We present the results of multisite observations spanning two years on the pre-main-sequence (PMS) star V351 Ori. A total of around 180 hours of observations over 29 nights have been collected, allowing us to measure five ...