7,314 research outputs found
Evaluation Strategy for the Re-Development of the Displays and Visitor Facilities at the Museum and Art Gallery, Kelvingrove
No abstract available
The APX Spectrometer for Martian Missions
Obtaining the chemical composition of any planetary body should be a prime science objective of each planetary mission. The APX spectrometer has been designed to provide a detailed and complete chemical composition of all major (except H) and minor elements with high accuracy, in situ and remotely. From such complete analyses a first-order mineralogy of analyzed samples can be deduced. Laboratory studies in the past have shown that rock types (e.g., dunites, basalts, Philippinate 300 sample) were a uniquely in blind test analyses. Such identification is more accurate than can be obtained from any other remote spectroscopic technique. The APX technique is based on three modes of nuclear and atomic interactions of alpha particles with matter resulting in three different energy spectra containing the compositional information. The instrument uses 50 to 100 mCi of Cm-242 or Cm-244 transuranium radioisotopes to provide a monoenergetic beam of alpha particles (6.01 MeV and 5.80 MeV respectively) and solid-state detectors for acquiring the energy spectra
ORAC-DR: A generic data reduction pipeline infrastructure
ORAC-DR is a general purpose data reduction pipeline system designed to be
instrument and observatory agnostic. The pipeline works with instruments as
varied as infrared integral field units, imaging arrays and spectrographs, and
sub-millimeter heterodyne arrays & continuum cameras. This paper describes the
architecture of the pipeline system and the implementation of the core
infrastructure. We finish by discussing the lessons learned since the initial
deployment of the pipeline system in the late 1990s.Comment: 11 pages, 1 figure, accepted for publication in Astronomy and
Computin
Conductance fluctuations and boundary conditions
The conductance fluctuations for various types for two-- and
three--dimensional disordered systems with hard wall and periodic boundary
conditions are studied, all the way from the ballistic (metallic) regime to the
localized regime. It is shown that the universal conductance fluctuations (UCF)
depend on the boundary conditions. The same holds for the metal to insulator
transition. The conditions for observing the UCF are also given.Comment: 4 pages RevTeX, 5 figures include
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