James Osborn

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This paper describes a system that semi-automatically builds a virtual world for remote operations by constructing 3-D models of a robot’s work environment. With a minimum of human interaction, planar and quadric surface representations of objects typically found in manmade facilities are generated from laser rangefinder data. The surface representations(More)
Robots and remote systems will play crucial roles in future decontamination and decommissioning (D&D) of nuclear facilities. Many of these facilities, such as uranium enrichment plants, weapons assembly plants, research and production reactors, and fuel recycling facilities, are dormant; there is also an increasing number of commercial reactors whose useful(More)
We present the first measurement of elliptic (v(2)) and triangular (v(3)) flow in high-multiplicity (3)He+Au collisions at √(s(NN))=200  GeV. Two-particle correlations, where the particles have a large separation in pseudorapidity, are compared in (3)He+Au and in p+p collisions and indicate that collective effects dominate the second and third Fourier(More)
Alzheimer's disease (AD) is a complex, multifactorial progressive neurodegenerative disease. Pathologically, AD is characterized by extracellular deposits of amyloid beta (Aβ) protein and intracellular accumulation of neurofibrillary tangles (NFTs) of tau. The central role of Aβ protein in the AD etiology is well-established, and its increased deposition in(More)
We present a novel stereoscopic mapping system for use in post-nuclear accident operations. First we discuss a radiation shielded sensor array designed to tolerate extended cumulative dose using 4 shielding. Next, we outline procedures to ensure timely, accurate range estimation using trinocular stereo. Finally, we review the implementation of a system for(More)
Vibrations are detrimental to the performance of modern adaptive optics (AO) systems. In this paper, we describe new methods tested to mitigate the vibrations encountered in some of the instruments of the Gemini South telescope. By implementing a spectral analysis of the slope measurements from several wavefront sensors and an imager, we can determine the(More)
In astronomy, the light emitted by an object travels through the vacuum of space and then the turbulent atmosphere before arriving at a ground based telescope. By passing through the atmosphere a series of turbulent layers modify the light's wave-front in such a way that Adaptive Optics reconstruction techniques are needed to improve the image quality. A(More)
Ronald Babich∗ , a Richard Brower,ab Michael Clark,b George Fleming,c James Osborn,d and Claudio Rebbiab aDepartment of Physics, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USA bCenter for Computational Science, Boston University, 3 Cummington Street, Boston, MA 02215, USA cDepartment of Physics, Yale University, New Haven, CT 06520, USA(More)