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Browsing MIT Open Access Articles by Title

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  • X-band radar based SLAM in Singapore's off-shore environment 
    Hover, Franz S.; Patrikalakis, Nicholas M.; Mullane, John Stephen; Keller, Samuel; Rao, Akshay; Adams, Martin; Yeo, Anthony (Institute of Electrical and Electronics Engineers (IEEE), 2010)
    This paper presents a simultaneous localisation and mapping (SLAM) algorithm implemented on an autonomous sea kayak with a commercial off-the-shelf X-band marine radar mounted. The Autonomous Surface Craft (ASC) was driven ...
  • XBP-1 regulates signal transduction, transcription factors and bone marrow colonization in B cells 
    Hu, Chih-Chi Andrew; Dougan, Stephanie K.; McGehee, Annette M.; Love, J. Christopher; Ploegh, Hidde (Nature Publishing Group, 2009-04)
    XBP-1, a transcription factor that drives the unfolded protein response (UPR), is activated in B cells when they differentiate to plasma cells. Here, we show that in the B cells, whose capacity to secrete IgM has been ...
  • XBP1s Links the Unfolded Protein Response to the Molecular Architecture of Mature N-Glycans 
    Antonopoulos, Aristotelis; Haslam, Stuart M.; Dell, Anne; Dewal, Mahender; DiChiara, Andrew Stephen; Taylor, Rebecca J.; Harmon, Chyleigh J.; Shoulders, Matthew D. (Elsevier, 2015-10)
    The molecular architecture of the mature N-glycome is dynamic, with consequences for both normal and pathologic processes. Elucidating cellular mechanisms that modulate the N-linked glycome is, therefore, crucial. The ...
  • XCone: N-jettiness as an exclusive cone jet algorithm 
    Thaler, Jesse; Tackmann, Frank J.; Vermilion, Christopher K.; Wilkason, Thomas F.; Stewart, Iain (Springer Berlin Heidelberg, 2015-11)
    We introduce a new jet algorithm called XCone, for eXclusive Cone, which is based on minimizing the event shape N -jettiness. Because N -jettiness partitions every event into N jet regions and a beam region, XCone is an ...
  • XIPE: the x-ray imaging polarimetry explorer 
    Grinberg, Victoria; Linares Alegret, Manuel; Marshall, Herman; Schulz, Norbert S (SPIE, 2016-06)
    XIPE, the X-ray Imaging Polarimetry Explorer, is a mission dedicated to X-ray Astronomy. At the time of writing XIPE is in a competitive phase A as fourth medium size mission of ESA (M4). It promises to reopen the polarimetry ...
  • The Xist lncRNA Exploits Three-Dimensional Genome Architecture to Spread Across the X Chromosome 
    Engreitz, Jesse Michael; Lander, Eric S.; Pandya-Jones, Amy; McDonel, Patrick; Shishkin, Alexander; Sirokman, Klara; Surka, Christine; Kadri, Sabah; Xing, Jeffrey; Goren, Alon; Plath, Kathrin; Guttman, Mitchell (American Association for the Advancement of Science (AAAS), 2013-07)
    Many large noncoding RNAs (lncRNAs) regulate chromatin, but the mechanisms by which they localize to genomic targets remain unexplored. We investigated the localization mechanisms of the Xist lncRNA during X-chromosome ...
  • The Xist lncRNA interacts directly with SHARP to silence transcription through HDAC3 
    McHugh, Colleen A.; Chen, Chun-Kan; Chow, Amy; Surka, Christine F.; Tran, Christina; McDonel, Patrick; Pandya-Jones, Amy; Blanco, Mario; Burghard, Christina; Moradian, Annie; Sweredoski, Michael J.; Shishkin, Alexander A.; Su, Julia; Hess, Sonja; Plath, Kathrin; Guttman, Mitchell; Lander, Eric Steven (Nature Publishing Group, 2015-04)
    Many long non-coding RNAs (lncRNAs) affect gene expression, but the mechanisms by which they act are still largely unknown. One of the best-studied lncRNAs is Xist, which is required for transcriptional silencing of one X ...
  • X-linked H3K27me3 demethylase Utx is required for embryonic development in a sex-specific manner 
    Welstead, G. Grant; Creyghton, Menno P.; Bilodeau, Steve; Cheng, Albert W.; Markoulaki, Styliani; Young, Richard A.; Jaenisch, Rudolf (National Academy of Sciences (U.S.), 2012-07)
    Embryogenesis requires the timely and coordinated activation of developmental regulators. It has been suggested that the recently discovered class of histone demethylases (UTX and JMJD3) that specifically target the ...
  • THE XMM-NEWTON /EPIC X-RAY LIGHT CURVE ANALYSIS OF WR 6 
    Ignace, R.; Gayley, K. G.; Hamann, W.-R.; Huenemoerder, David P.; Oskinova, Lidia M.; Pollock, A. M. T.; McFall, M. (Institute of Physics/American Astronomical Society, 2013-09)
    We obtained four pointings of over 100 ks each of the well-studied Wolf-Rayet star WR 6 with the XMM-Newton satellite. With a first paper emphasizing the results of spectral analysis, this follow-up highlights the X-ray ...
  • X-Pipeline: an analysis package for autonomous gravitational-wave burst searches 
    Sutton, Patrick J.; Jones, Gareth; Chatterji, Shourov K.; Kalmus, P.; Leonor, Isabel; Poprocki, Stephen; Rollins, Jameson; Searle, Antony; Stein, Leo Chaim; Tinto, Massimo; Was, Michal (Institute of Physics Publishing, 2010-05)
    Autonomous gravitational-wave searches—fully automated analyses of data that run without human intervention or assistance—are desirable for a number of reasons. They are necessary for the rapid identification of ...
  • XPS Investigation of the Electrolyte Induced Stabilization of LiCoO[subscript 2] and "AIPO[subscript 4]"-Coated LiCoO[subscript 2] Composite electrodes 
    Quinlan, Ronald A.; Mansour, Azzam N.; Lu, Yi-Chun; Kwabi, David Gator; Shao-Horn, Yang (Electrochemical Society, 2015-12)
    The “AlPO[subscript4]” coating has been shown to improve the electrochemical performance of LiCoO2 batteries. We previously showed that the “AlPO[subscript4]” coating promotes the formation of metal fluorides, which could ...
  • X-ray absorption spectroscopy elucidates the impact of structural disorder on electron mobility in amorphous zinc-tin-oxide thin films 
    Siah, Sin Cheng; Lee, Sang Woon; Lee, Yun Seog; Heo, Jaeyeong; Shibata, Tomohiro; Segre, Carlo U.; Gordon, Roy G.; Buonassisi, Tonio (American Institute of Physics (AIP), 2014-06)
    We investigate the correlation between the atomic structures of amorphous zinc-tin-oxide (a-ZTO) thin films grown by atomic layer deposition (ALD) and their electronic transport properties. We perform synchrotron-based ...
  • X-ray analysis of butirosin biosynthetic enzyme BtrN redefines structural motifs for AdoMet radical chemistry 
    Goldman, Peter J.; Grove, Tyler L.; Booker, Squire J.; Drennan, Catherine L. (National Academy of Sciences (U.S.), 2013-10)
    The 2-deoxy-scyllo-inosamine (DOIA) dehydrogenases are key enzymes in the biosynthesis of 2-deoxystreptamine–containing aminoglycoside antibiotics. In contrast to most DOIA dehydrogenases, which are NAD-dependent, the DOIA ...
  • X-ray and electron diffraction studies of superlattices and long-range three-dimensional Na ordering in gamma-Na[subscript x]CoO[subscript 2] (x=0.71 and 0.84) 
    Chou, F. C.; Liu, L.-K.; Chen, C. H.; Sheu, H. S.; Shu, G. J.; Chu, M.-W.; Huang, F.-T.; Lee, Patrick A. (American Physical Society, 2009-01)
    We have recently demonstrated that x=0.71 and 0.84 are the two most stable single-phase compounds above x=0.5 in gamma-Na[subscript x]CoO[subscript 2] [G. J. Shu et al., Phys. Rev. B 76, 184115 (2007); F. C. Chou et al., ...
  • X-RAY AND NEAR-INFRARED OBSERVATIONS OF THE OBSCURED ACCRETING PULSAR IGR J18179–1621 
    Paizis, A.; Rodriguez, J.; Chaty, S.; Santo, M. Del; Grinberg, Victoria; Wilms, J.; Ubertini, P.; Chini, R.; Nowak, Michael A. (IOP Publishing, 2012-09)
    IGR J18179–1621 is an obscured accreting X-ray pulsar discovered by INTEGRAL on 2012 February 29. We report on our 20 ks Chandra-High Energy Transmission Gratings Spectrometer observation of the source performed on 2012 ...
  • X-ray and optical flux ratio anomalies in quadruply lensed quasars. II. Mapping the dark matter content in elliptical galaxies 
    Pooley, David; Rappaport, Saul A.; Blackburne, Jeffrey A.; Schechter, Paul L.; Wambsganss, Joachim (Institute of Physics Publishing, 2012-01)
    We present a microlensing analysis of 61 Chandra observations of 14 quadruply lensed quasars. X-ray flux measurements of the individual quasar images give a clean determination of the microlensing effects in the lensing ...
  • X-RAY AND OPTICAL STUDY OF LOW CORE DENSITY GLOBULAR CLUSTERS NGC6144 AND E3 
    Lan, Shih-Hao; Kong, Albert K. H.; Verbunt, Frank; Lewin, Walter H. G.; Bassa, Cees; Anderson, Scott F.; Pooley, David (IOP Publishing, 2010-03)
    We report on the Chandra X-ray Observatory and Hubble Space Telescope (HST) observations of two low core-density globular clusters, NGC6144 and E3. By comparing the number of X-ray sources inside the half-mass radius to ...
  • X-RAY AND RADIO VARIABILITY OF M31*, THE ANDROMEDA GALAXY NUCLEAR SUPERMASSIVE BLACK HOLE 
    Garcia, M. R.; Hextall, Richard; Baganoff, Frederick K.; Galache, Jose; Melia, Fulvio; Murray, Stephen S.; Primini, F. A.; Sjouwerman, Loránt O.; Williams, Ben (Institute of Physics/American Astronomical Society, 2010-02)
    We confirm our earlier tentative detection of M31* in X-rays and measure its light curve and spectrum. Observations in 2004-2005 find M31* rather quiescent in the X-ray and radio. However, X-ray observations in 2006-2007 ...
  • X-RAY CAVITIES IN A SAMPLE OF 83 SPT-SELECTED CLUSTERS OF GALAXIES: TRACING THE EVOLUTION OF AGN FEEDBACK IN CLUSTERS OF GALAXIES OUT TO z = 1.2 
    Hlavacek-Larrondo, J.; Benson, B. A.; Forman, W. R.; Allen, S. W.; Bleem, L. E.; Ashby, M. L. N.; Bocquet, S.; Brodwin, M.; Dietrich, J. P.; Jones, C.; Liu, J.; Reichardt, C. L.; Saliwanchik, B. R.; Saro, A.; Schrabback, T.; Song, J.; Stalder, B.; Vikhlinin, A.; Zenteno, A.; McDonald, Michael A. (IOP Publishing, 2015-05)
    X-ray cavities are key tracers of mechanical (or radio mode) heating arising from the active galactic nuclei (AGNs) in brightest cluster galaxies (BCGs). We report on a survey for X-ray cavities in 83 massive, high-redshift ...
  • X-RAY EJECTA KINEMATICS OF THE GALACTIC CORE-COLLAPSE SUPERNOVA REMNANT G292.0+1.8 
    Bhalerao, Jayant; Park, Sangwook; Dewey, Dan; Hughes, John P.; Mori, Koji; Lee, Jae-Joon (IOP Publishing, 2015-02)
    We report on the results from the analysis of our 114 ks Chandra High Energy Transmision Grating Spectrometer observation of the Galactic core-collapse supernova remnant G292.0+1.8. To probe the three-dimensional structure ...
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