17 research outputs found
3D Mapping, Localisation and Object Retrieval using Low Cost Robotic Platforms: A Robotic Search Engine for the Real-World
In this paper we present work in progress on
the development of a low-cost autonomous robotic platform
that integrates multiple state-of-the-art techniques in RGB-D
perception to form a system capable of completing a real-world
task in an entirely autonomous fashion. The task we set out to
complete is determining the location of a preselected object within
the physical world. This experiment requires a robotic framework
with a number of capabilities including autonomous exploration,
dense real-time localisation and mapping, object detection, path
planning and motion control
Gamma ray astrophysics: the EGRET results
Cosmic gamma rays provide insight into some of the most dynamic processes in
the Universe. At the dawn of a new generation of gamma-ray telescopes, this
review summarizes results from the Energetic Gamma Ray Experiment Telescope
(EGRET) on the Compton Gamma Ray Observatory, the principal predecessor mission
studying high-energy photons in the 100 MeV energy range. EGRET viewed a
gamma-ray sky dominated by prominent emission from the Milky Way, but featuring
an array of other sources, including quasars, pulsars, gamma-ray bursts, and
many sources that remain unidentified. A central feature of the EGRET results
was the high degree of variability seen in many gamma-ray sources, indicative
of the powerful forces at work in objects visible to gamma-ray telescopes.Comment: 23 pages, 24 figure
Fermi Gamma-ray Space Telescope: High-Energy Results from the First Year
The Fermi Gamma-ray Space Telescope (Fermi) was launched on June 11, 2008 and
began its first year sky survey on August 11, 2008. The Large Area Telescope
(LAT), a wide field-of-view pair-conversion telescope covering the energy range
from 20 MeV to more than 300 GeV, is the primary instrument on Fermi. While
this review focuses on results obtained with the LAT, the Gamma-ray Burst
Monitor (GBM) complements the LAT in its observations of transient sources and
is sensitive to X-rays and gamma-rays with energies between 8 keV and 40 MeV.
During the first year in orbit, the Fermi LAT has observed a large number of
sources that include active galaxies, pulsars, compact binaries, globular
clusters, supernova remnants, as well as the Sun, the Moon and the Earth. The
GBM and LAT together have uncovered surprising characteristics in the
high-energy emission of gamma-ray bursts (GRBs) that have been used to set
significant new limits on violations of Lorentz invariance. The Fermi LAT has
also made important new measurements of the Galactic diffuse radiation and has
made precise measurements of the spectrum of cosmic-ray electrons and positrons
from 20 GeV to 1 TeV.Comment: 39 pages, 16 figure