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Browsing MIT Open Access Articles by Title

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  • Platt, Robert; Fagg, Andrew H.; Grupen, Roderic A. (Institute of Electrical and Electronics Engineers, 2010-04)
    A key problem in robot grasping is that of positioning the manipulator contacts so that an object can be grasped. In unstructured environments, contact positions are typically planned based on range or visual measurements ...
  • Fox, Jacob; Suk, Andrew; Pach, Janos (Society for Industrial and Applied Mathematics, 2013-03)
    A graph drawn in the plane is called k-quasi-planar if it does not contain k pairwise crossing edges. It has been conjectured for a long time that for every fixed k, the maximum number of edges of a k-quasi-planar graph ...
  • Bardhan, Jaydeep P.; Altman, Michael D.; Willis, David J.; Lippow, Shaun M.; Tidor, Bruce; White, Jacob K. (American Institute of Physics (AIP), 2007-07)
    urface formulations of biophysical modeling problems offer attractive theoretical and computational properties. Numerical simulations based on these formulations usually begin with discretization of the surface under ...
  • Wang, Xiaoting; Byrd, Mark; Jacobs, Kurt (American Physical Society, 2013-01)
    In this work, inspired by the study of semidefinite programming for block-diagonalizing matrix *-algebras, we propose an algorithm that can find the algebraic structure of decoherence-free subspaces (DFS's) for a given ...
  • Csete, Maria; Sipos, Áron; Najafi, Faraz; Hu, Xiaolong; Berggren, Karl K. (Optical Society of America, 2011-10)
    A finite-element method for calculating the illumination-dependence of absorption in three-dimensional nanostructures is presented based on the radio frequency module of the Comsol Multiphysics software package (Comsol ...
  • Miyasaka, Hiromasa; Bachetti, Matteo; Harrison, Fiona A.; Barret, Didier; Bellm, Eric C.; Boggs, Steven E.; Chakrabarty, Deepto; Chenevez, Jerome; Christensen, Finn E.; Craig, William W.; Grefenstette, Brian W.; Hailey, Charles J.; Madsen, Kristin K.; Natalucci, Lorenzo; Pottschmidt, Katja; Stern, Daniel; Tomsick, John A.; Walton, Dominic J.; Zhang, William; Furst, Felix; Wilms, Jorn (IOP Publishing, 2013-09)
    The Nuclear Spectroscopic Telescope Array hard X-ray telescope observed the transient Be/X-ray binary GS 0834–430 during its 2012 outburst—the first active state of this system observed in the past 19 yr. We performed ...
  • Pottschmidt, Katja; Kennea, Jamie; Bachetti, Matteo; Bellm, Eric; Boggs, Steven E.; Chakrabarty, Deepto; Christensen, Finn E.; Craig, William W.; Hailey, Charles J.; Harrison, Fiona; Stern, Daniel; Tomsick, John A.; Walton, Dominic J.; Zhang, William; Furst, Felix; Wilms, Jorn (IOP Publishing, 2014-03)
    We present a spectral analysis of three simultaneous Nuclear Spectroscopy Telescope Array and Swift/XRT observations of the transient Be-neutron star binary KS 1947+300 taken during its outburst in 2013/2014. These broadband ...
  • Chakrabarty, Deepto; NuSTAR Team (WILEY-VCH Verlag GmbH & Co., 2014-03)
    The Nuclear Spectroscopic Telescope Array (NuSTAR) is the first focusing hard X-ray mission in orbit and operates in the 3–79 keV range. NuSTAR's sensitivity is roughly two orders of magnitude better than previous missions ...
  • Miller, J. M.; Parker, M. L.; Fuerst, F.; Bachetti, M.; Harrison, F. A.; Barret, D.; Boggs, S. E.; Christensen, F. E.; Craig, W. W.; Fabian, A. C.; Grefenstette, B. W.; Hailey, C. J.; King, A. L.; Stern, D. K.; Tomsick, J. A.; Walton, D. J.; Zhang, W. W.; Chakrabarty, Deepto (IOP Publishing, 2013-09)
    We report on the results of spectral fits made to a NuSTAR observation of the black hole GRS 1915+105 in a "plateau" state. This state is of special interest because it is similar to the "low/hard" state seen in other black ...
  • Wurtman, Richard Jay (MDPI AG, 2014-04)
    Brain neurons form synapses throughout the life span. This process is initiated by neuronal depolarization, however the numbers of synapses thus formed depend on brain levels of three key nutrients—uridine, the omega-3 ...
  • Wang, Jue D.; Sanders, Glenn M.; Grossman, Alan D. (Elsevier, 2007-03)
    DNA replication is highly regulated in most organisms. Although much research has focused on mechanisms that regulate initiation of replication, mechanisms that regulate elongation of replication are less well understood. ...
  • Berman, Piotr; Demaine, Erik D.; Zadimoghaddam, Morteza (Springer Berlin / Heidelberg, 2011-08)
    We develop constant-factor approximation algorithms for minimizing the maximum movement made by pebbles on a graph to reach a configuration in which the pebbles form a connected subgraph (connectivity), or interconnect a ...
  • Wildschutte, Hans; Preheim, Sarah Pacocha; Hernandez, Yasiel; Polz, Martin F. (Blackwell Publishing, 2010-11)
    The O-antigen is a highly diverse structure expressed on the outer surface of Gram-negative bacteria. The products responsible for O-antigen synthesis are encoded in the wbe region, which exhibits extensive genetic diversity. ...
  • Carlin, Bruce Ian; Manso, Gustavo (Oxford University Press for the Society for Financial Studies, 2010-09)
    Investor sophistication has lagged behind the growing complexity of retail financial markets. To explore this, we develop a dynamic model to study the interaction between obfuscation and investor sophistica- tion in ...
  • Zhang, Ying; Meyers, Ethan M.; Bichot, Narcisse Pascal; Serre, Thomas R.; Poggio, Tomaso A.; Desimone, Robert (National Academy of Sciences (U.S.), 2011-05)
    Recognizing objects in cluttered scenes requires attentional mechanisms to filter out distracting information. Previous studies have found several physiological correlates of attention in visual cortex, including larger ...
  • Santos, Miguel A.; Turinsky, Andrei L.; Ong, Serene; Tsai, Jennifer; Berger, Michael F.; Badis, Gwenael; Talukder, Shaheynoor; Gehrke, Andrew R.; Hughes, Timothy R.; Wodak, Shoshana J.; Bulyk, Martha L. (Oxford University Press (OUP), 2010-08)
    Classifying proteins into subgroups with similar molecular function on the basis of sequence is an important step in deriving reliable functional annotations computationally. So far, however, available classification ...
  • Holladay, Anne E.; Barry, Jennifer; Kaelbling, Leslie P.; Lozano-Perez, Tomas (Institute of Electrical and Electronics Engineers (IEEE), 2013-05)
    We present an approach to robust placing that uses movable surfaces in the environment to guide a poorly grasped object into a goal pose. This problem is an instance of the inverse motion planning problem, in which we solve ...
  • Hsiao, Kai-yuh; Tellex, Stefanie; Vosoughi, Soroush; Kubat, Rony; Roy, Deb K. (2008-12)
    An approach is introduced for physically grounded natural language interpretation by robots that reacts appropriately to unanticipated physical changes in the environment and dynamically assimilates new information pertinent ...
  • Hsiao, Kai-yuh; Vosoughi, Soroush; Tellex, Stefanie; Kubat, Rony; Roy, Deb K. (Association for Computing Machinery, 2008)
    The use of natural language should be added to a robot system without sacrificing responsiveness to the environment. In this paper, we present a robot that manipulates objects on a tabletop in response to verbal interaction. ...
  • Hare, Caspar (Wiley Periodicals, Inc., 2011-01)
    It is natural to distinguish between objective and subjective senses of ‘ought’. Roughly: what you ought to do in the objective sense has to do with the merits and demerits of the options available to you, while what you ...
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