In risk management, tail risks are of crucial importance. The quality a model, which is determined by data from an unknown distribution, depends critically on the subset used to model tail. Based suitably weighted mean square error, we present method that can separate required subset. selected determine parameters model. Notably, no parameter specifications have be made apply proposed procedure...

Magnetic sounding is a powerful tool to explore the interior of planetary bodies through electrical conductivity structure. The structure lunar mantle has previously been derived from surface magnetic field measurements as part Apollo 12 mission and concurrent magnetometer data acquired orbit Explorer 35 satellite. Here, we derive first global upper midmantle using only satellite collected by r...

We present measurements of Fe, Mg, Si, Ca, and Ti abundances for 388 radial velocity member stars in the Sculptor dwarf spheroidal galaxy (dSph), a satellite of the Milky Way. This is the largest sample of individual α element (Mg, Si, Ca, Ti) abundance measurements in any single dSph. The measurements are made from Keck/DEIMOS medium-resolution spectra (6400–9000 Å, R ∼ 6500). Based on compari...

A quasi-tailless flight investigation was launched using the X-31A enhanced fighter maneuverability airplane. In-flight simulations were used to assess the effect of partial to total vertical tail removal. The rudder control surface was used to cancel the stabilizing effects of the vertical tail, and yaw thrust vector commands were used to restabilize and control the airplane. The quasi-tailles...