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Browsing MIT Open Access Articles by Title

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  • Gonsalves, Tina; Frith, Chris; Averbeck, Bruno; Berthouze, Nadia; Iacobini, Matt; Critchley, Hugo; Sloan, Helen; Kashef, Youssef; Mahmoud, Abdelrahman N.; el Kaliouby, Rana; Picard, Rosalind W. (Institute of Electrical and Electronics Engineers, 2009-12)
    This demonstration allows the audience to interact with prototype 07 of the Chameleon interactive artwork installation. It is part of a project exploring emotional contagion, and communication, built by a cross disciplinary ...
  • Ono, Masahiro; Williams, Brian Charles; Blackmore, Lars (American Automatic Control Council, 2010-07)
    This paper considers finite-horizon optimal control for dynamic systems subject to additive Gaussian-distributed stochastic disturbance and a chance constraint on the system state defined on a non-convex feasible space. ...
  • Blackmore, Lars; Ono, Masahiro; Williams, Brian Charles (Institute of Electrical and Electronics Engineers (IEEE), 2011-12)
    Autonomous vehicles need to plan trajectories to a specified goal that avoid obstacles. For robust execution, we must take into account uncertainty, which arises due to uncertain localization, modeling errors, and disturbances. ...
  • Fang, Cheng; Yu, Peng; Williams, Brian Charles (Association for the Advancement of Artificial Intelligence (AAAI), 2014-07)
    Scheduling under uncertainty is essential to many autonomous systems and logistics tasks. Probabilistic methods for solving temporal problems exist which quantify and attempt to minimize the probability of schedule failure. ...
  • Luders, Brandon Douglas; Kothari, Mangal; How, Jonathan P. (American Institute of Aeronautics and Astronautics, 2010-08)
    For motion planning problems involving many or unbounded forms of uncertainty, it may not be possible to identify a path guaranteed to be feasible, requiring consideration of the trade-off between planner conservatism and ...
  • Wang, Andrew J.; Williams, Brian Charles (Association for the Advancement of Artificial Intelligence, 2015-01)
    Temporal uncertainty in large-scale logistics forces one to trade off between lost efficiency through built-in slack and costly replanning when deadlines are missed. Due to the difficulty of reasoning about such likelihoods ...
  • Kharb, Preeti; Lister, Matthew L.; Hogan, Brandon S.; Marshall, Herman Lee (IOP Publishing, 2012-03)
    We present results from deep (~70 ks) Chandra/ACIS observations and Hubble Space Telescope (HST) Advanced Camera for Surveys F475W observations of two highly optically polarized quasars belonging to the MOJAVE blazar sample, ...
  • Lu, Ting-Ni; Kong, Albert K. H.; Verbunt, Frank; Lewin, Walter H. G.; Anderson, Scott F.; Pooley, David (IOP Publishing, 2011-07)
    We present the analysis of two observations of M92 taken with the Chandra X-Ray Observatory. We combined the two data sets with a total exposure of ~52 ks. With the combined observation, we detected 10 X-ray sources inside ...
  • Torrejon, J. M.; Schulz, Norbert S.; Nowak, Michael A. (IOP Publishing, 2012-04)
    We present an analysis of a pointed 141 ks Chandra high-resolution transmission gratings observation of the Be X-ray emitting star HD110432, a prominent member of the γ Cas analogs. This observation represents the first ...
  • Hogan, Brandon S.; Lister, Matthew L.; Kharb, Preeti; Cooper, Nathaniel J.; Marshall, Herman Lee (IOP Publishing, 2011-03)
    The Chandra X-ray Observatory has proven to be a vital tool for studying high-energy emission processes in jets associated with active galactic nuclei (AGNs). We have compiled a sample of 27 AGNs selected from the radio ...
  • Jeltema, Tesla E.; Canizares, Claude R.; Garmire, Gordon P.; Buote, David A. (IOP Publishing, 2002-09)
    We present an analysis of a Chandra ACIS-S observation of the elliptical galaxy NGC 720, to verify the existence of a dark matter halo and to measure its ellipticity. The ACIS-S3 image reveals over 60 point sources distributed ...
  • Gammie, C.; Dexter, J.; Markoff, S.; Haggard, D.; Nayakshin, S.; Wang, Q. D.; Grosso, N.; Porquet, D.; Tomsick, J. A.; Degenaar, N.; Fragile, P. C.; Wijnands, R.; Miller, J. M.; Baganoff, Frederick K.; Neilsen, Joey; Nowak, Michael A.; Houck, John C. (IOP Publishing, 2013-08)
    We present the first systematic analysis of the X-ray variability of Sgr A* during the Chandra X-ray Observatory's 2012 Sgr A* X-ray Visionary Project. With 38 High Energy Transmission Grating Spectrometer observations ...
  • Markoff, S. B.; Porquet, D.; Grosso, N.; Levin, Y.; Eckart, A.; Falcke, Heino; Ji, L.; Miller, J. M.; Wang, Q. D.; Nowak, Michael A.; Neilsen, Joey; Baganoff, Frederick K.; Houck, John C. (IOP Publishing, 2012-10)
    Starting in 2012, we began an unprecedented observational program focused on the supermassive black hole in the center of our Galaxy, Sgr A*, utilizing the High Energy Transmission Grating Spectrometer (HETGS) instrument ...
  • Murphy, K. D.; Nowak, Michael A. (IOP Publishing, 2014-11)
    We present a spectral analysis of the 118 ks Chandra High Energy Transmission Gratings (HETG) observation of the X-ray bright Seyfert 1.5 galaxy MCG +8-11-11, in conjunction with 100 ks of archival Suzaku data, aimed at ...
  • Canizares, Claude R.; Davis, John E.; Dewey, Dan; Flanagan, Kathryn A.; Galton, Eugene B.; Huenemoerder, David P.; Ishibashi, Kazunori; Markert, Thomas H.; Marshall, Herman Lee; McGuirk, Michael; Schattenburg, Mark Lee; Schulz, Norbert S.; Smith, Henry Ignatius; Wise, Michael (University of Chicago Press, The, 2005-09)
    Details of the design, fabrication, and ground and flight calibration of the High Energy Transmission Grating (HETG) on the Chandra X‐Ray Observatory are presented after 5 years of flight experience. Specifics include the ...
  • Trichas, Markos; Green, Paul J.; Silverman, John D.; Aldcroft, Tom; Barkhouse, Wayne; Cameron, Robert A.; Constantin, Anca; Ellison, Sara L.; Foltz, Craig; Haggard, D.; Jannuzi, Buell T.; Kim, Dong-Woo; Marshall, Herman Lee; Mossman, Amy; Pérez, Laura M.; Romero-Colmenero, Encarni; Ruiz, Angel; Smith, Malcolm G.; Smith, Paul S.; Torres, Guillermo; Wik, Daniel R.; Wilkes, Belinda J.; Wolfgang, Angie (Institute of Physics/American Astronomical Society, 2012-06)
    From optical spectroscopy of X-ray sources observed as part of the Chandra Multi-wavelength Project (ChaMP), we present redshifts and classifications for a total of 1569 Chandra sources from our targeted spectroscopic ...
  • Lal, D. V.; Kraft, Ralph P.; Forman, W. R.; Hardcastle, M. J.; Jones, C.; Nulsen, P. E. J.; Croston, J. H.; Lee, J. C.; Evans, Daniel A. (IOP Publishing, 2010-10)
    We present results from a 42 ks Chandra/ACIS-S observation of the transitional FR I/FR II radio galaxy 3C 288 at z = 0.246. We detect ~3 keV gas extending to a radius of ~0.5 Mpc with a 0.5-2.0 keV luminosity of 6.6 × ...
  • Paizis, A.; Rodriguez, J.; Wilms, J.; Chaty, S.; Del Santo, M.; Ubertini, P.; Nowak, Michael A. (IOP Publishing, 2012-07)
    IGR J17511–3057 is a low-mass X-ray binary hosting a neutron star and is one of the few accreting millisecond X-ray pulsars with X-ray bursts. We report on a 20 ks Chandra grating observation of IGR J17511–3057, performed ...
  • Helder, E. A.; Broos, P. S.; Dewey, Dan; Dwek, E.; McCray, R.; Park, S.; Racusin, J. L.; Zhekov, S. A.; Burrows, David N. (Institute of Physics/American Astronomical Society, 2013-02)
    We report on the present stage of SN 1987A as observed by the Chandra X-Ray Observatory. We reanalyze published Chandra observations and add three more epochs of Chandra data to get a consistent picture of the evolution ...
  • Davis, John E.; Houck, John C.; Nowak, Michael A. (IOP Publishing, 2010-07)
    The Chandra Source Catalog (CSC) is a general purpose virtual X-ray astrophysics facility that provides access to a carefully selected set of generally useful quantities for individual X-ray sources, and is designed to ...
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