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Browsing MIT Open Access Articles by Title

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  • The ASTRO-H mission 
    Bautz, Mark W. (SPIE, 2010-07)
    The joint JAXA/NASA ASTRO-H mission is the sixth in a series of highly successful X-ray missions initiated by the Institute of Space and Astronautical Science (ISAS). ASTRO-H will investigate the physics of the high-energy ...
  • An Astrophysical View of Earth-Based Metabolic Biosignature Gases 
    Seager, Sara; Schrenk, Matthew; Bains, William (Mary Ann Liebert, 2012-01)
    Microbial life on Earth uses a wide range of chemical and energetic resources from diverse habitats. An outcome of this microbial diversity is an extensive and varied list of metabolic byproducts. We review key points of ...
  • Asymmetric Carbon-Carbon Bond Formation gamma to a Carbonyl Group: Phosphine-Catalyzed Addition of Nitromethane to Allenes 
    Smith, Sean W.; Fu, Gregory C. (American Chemical Society, 2009-09)
    A chiral phosphine catalyzes the addition of a carbon nucleophile to the γ position of an electron-poor allene (amide-, ester-, or phosphonate-substituted), in preference to isomerization to a 1,3-diene, in good ee and ...
  • Asymmetric Image-Template Registration 
    Sabuncu, Mert R.; Yeo, B. T. Thomas; Van Leemput, Koen; Vercauteren, Tom; Golland, Polina (Springer Berlin / Heidelberg, 2009-10)
    A natural requirement in pairwise image registration is that the resulting deformation is independent of the order of the images. This constraint is typically achieved via a symmetric cost function and has been shown to ...
  • Asymmetric information diffusion via gossiping on static and dynamic networks 
    Yildiz, Mehmet Ercan; Scaglione, Anna; Ozdaglar, Asuman E. (Institute of Electrical and Electronics Engineers, 2010-12)
    In this paper we consider the problem of gossiping in a network to diffuse the average of a sub-set of nodes, called sources, and directing it to another sub-set of nodes in the network called destinations. This case ...
  • Asymmetric multilevel outphasing architecture for multi-standard transmitters 
    Chung, SungWon; Godoy, Philip Andrew; Barton, Taylor W.; Huang, Everest W.; Perreault, David J.; Dawson, Joel L. (Institute of Electrical and Electronics Engineers, 2009-06)
    We describe a new outphasing transmitter architecture in which the supply voltage for each PA can switch among multiple levels. It is based on a new asymmetric multilevel outphasing (AMO) modulation technique which increases ...
  • Asymmetric multilevel outphasing transmitter using Class-E PAs with discrete pulse width modulation 
    Chung, SungWon; Godoy, Philip Andrew; Barton, Taylor W.; Perreault, David J.; Dawson, Joel L. (Institute of Electrical and Electronics Engineers (IEEE), 2010-07)
    We present a high-efficiency transmitter architecture based on asymmetric multilevel outphasing (AMO), but with a new method of generating discrete amplitude levels from the constituent amplifiers. AMO and multilevel LINC ...
  • Asymptotically-optimal path planning for manipulation using incremental sampling-based algorithms 
    Perez, Alejandro Tomas; Karaman, Sertac; Shkolnik, Alexander C.; Frazzoli, Emilio; Teller, Seth; Walter, Matthew R. (Institute of Electrical and Electronics Engineers (IEEE), 2011-12)
    A desirable property of path planning for robotic manipulation is the ability to identify solutions in a sufficiently short amount of time to be usable. This is particularly challenging for the manipulation problem due to ...
  • Asymptotic Analysis of MAP Estimation via the Replica Method and Applications to Compressed Sensing 
    Goyal, Vivek K.; Rangan, Sundeep; Fletcher, Alyson K. (Institute of Electrical and Electronics Engineers (IEEE), 2012-03)
    The replica method is a nonrigorous but well-known technique from statistical physics used in the asymptotic analysis of large, random, nonlinear problems. This paper applies the replica method, under the assumption of ...
  • Asynchronous CSMA Policies in Multihop Wireless Networks With Primary Interference Constraints 
    Marbach, Peter; Eryilmaz, Atilla; Ozdaglar, Asuman E. (Institute of Electrical and Electronics Engineers (IEEE), 2011-05)
    We analyze asynchronous carrier sense multiple access (CSMA) policies for scheduling packet transmissions in multihop wireless networks subject to collisions under primary interference constraints. While the (asymptotic) ...
  • Asynchronous Network Coded Multicast 
    Traskov, Danail; Lenz, Johannes; Ratnakar, Niranjan; Medard, Muriel (Institute of Electrical and Electronics Engineers, 2010-07)
    We consider the problem of setting up a multicast connection of minimum cost using network coding. It is well-known that this can be posed in the form of a convex program. Our contribution is an asynchronous algorithm for ...
  • ATAC: A 1000-Core Cache-Coherent Processor with On-Chip Optical Network 
    Kurian, George; Miller, Jason E.; Psota, James R.; Eastep, Jonathan Michael; Liu, Jifeng; Michel, Jurgen; Kimerling, Lionel C.; Agarwal, Anant (Association for Computing Machinery, 2010-09)
    Based on current trends, multicore processors will have 1000 cores or more within the next decade. However, their promise of increased performance will only be realized if their inherent scaling and programming challenges ...
  • ATAC: Improving performance and programmability 
    Psota, James R.; Miller, Jason; Kurian, George; Hoffman, Henry; Beckmann, Nathan Zachary; Eastep, Jonathan Michael; Agarwal, Anant (Institute of Electrical and Electronics Engineers (IEEE), 2010-08)
    Given the current trends in multicore scaling, chips with 1000 cores may exist within the next 5 to 10 years. However, their promise of increased performance will only be reached if their inherent scaling and programming ...
  • Athermal Operation of Silicon Waveguides: Spectral, Second Order and Footprint Dependencies 
    Raghunathan, Vivek; Ye, Winnie N.; Hu, Juejun; Izuhara, Tomoyuki; Michel, Jurgen; Kimerling, Lionel C. (Optical Society of America, 2010-08)
    We report the design criteria and performance of Si ring resonators for passive athermal applications in wavelength division multiplexing (WDM). The waveguide design rules address i) positivenegative thermo-optic (TO) ...
  • Atherosclerotic tissue characterization in vivo by optical coherence tomography attenuation imaging 
    Tearney, Guillermo J.; Bouma, Brett E.; Oosterhuis, J. Wolter; Okamura, Takayuki; van Noorden, Sander; Gonzalo, Nieves; van Leenders, Geert L. J. H.; Koljenović, Senada; van der Steen, Anton F. W.; Serruys, Patrick W.; Regar, Evelyn; Goderie, Thadé; van Soest, Gijs (SPIE, 2010-01)
    Optical coherence tomography (OCT) is rapidly becoming the method of choice for assessing arterial wall pathology in vivo. Atherosclerotic plaques can be diagnosed with high accuracy, including measurement of the thickness ...
  • Atlas Generation for Subcortical and Ventricular Structures With Its Applications in Shape Analysis 
    Qiu, Anqi; Brown, Timothy; Fischl, Bruce; Ma, Jun; Miller, Michael I. (Institute of Electrical and Electronics Engineers, 2010-05)
    Atlas-driven morphometric analysis has received great attention for studying anatomical shape variation across clinical populations in neuroimaging research as it provides a local coordinate representation for understanding ...
  • ATLAS measurements of the properties of jets for boosted particle searches 
    Taylor, Frank E. (American Physical Society, 2012-10)
    Measurements are presented of the properties of high transverse momentum jets, produced in proton-proton collisions at a center-of-mass energy of √s=7  TeV. The data correspond to an integrated luminosity of 35  pb[superscript ...
  • The atmospheres of the hot-Jupiters Kepler-5b and Kepler-6b observed during occultations with Warm-Spitzer and Kepler 
    Charbonneau, David; Fortney, Jonathan J.; Desert, Jean-Michel; Madhusudhan, Nikku; Knutson, Heather A.; Fressin, Fran¸cois; Deming, Drake; Borucki, William J.; Brown, Timothy M.; Caldwell, Douglas; Ford, Eric B.; Gilliland, Ronald L.; Latham, David W.; Marcy, Geoffrey W.; Seager, Sara (IOP Publishing, 2011-11)
    This paper reports the detection and the measurements of occultations of the two transiting hot giant exoplanets Kepler-5b and Kepler-6b by their parent stars. The observations are obtained in the near-infrared with ...
  • Atmospheric ammonia and particulate inorganic nitrogen over the United States 
    Heald, Colette L.; Collett, J. L., Jr.; Lee, T.; Benedict, K. B.; Schwandner, F. M.; Li, Y.; Clarisse, L.; Hurtmans, D. R.; Damme, M. Van; Clerbaux, C.; Coheur, P. -F.; Philip, S.; Martin, R. V.; Pye, H. O. T. (Copernicus GmbH, 2012-11)
    We use in situ observations from the Interagency Monitoring of PROtected Visual Environments (IMPROVE) network, the Midwest Ammonia Monitoring Project, 11 surface site campaigns as well as Infrared Atmospheric Sounding ...
  • Atmospheric histories and global emissions of the anthropogenic hydrofluorocarbons HFC-365mfc, HFC-245fa, HFC-227ea, and HFC-236fa 
    Rigby, Matthew; Ivy, Diane J.; Prinn, Ronald G.; Vollmer, Martin K.; Miller, Benjamin R.; Reimann, Stefan; Mühle, Jens; Krummel, Paul B.; O'Doherty, Simon; Kim, Jooil; Rhee, Tae Siek; Weiss, Ray F.; Fraser, Paul J.; Simmonds, Peter G.; Salameh, Peter K.; Harth, Christina M.; Wang, Ray H. J.; Steele, L. Paul; Young, Dickon; Lunder, Chris R.; Hermansen, Ove; Arnold, Tim; Schmidbauer, Norbert; Kim, Kyung-Ryul; Greally, Brian R.; Hill, Matthias; Leist, Michael; Wenger, Angelina (American Geophysical Union (AGU), 2011-04)
    We report on ground-based atmospheric measurements and emission estimates of the four anthropogenic hydrofluorocarbons (HFCs) HFC-365mfc (CH[subscript 3]CF[subscript 2]CH[subscript 2]CF[subscript 3], 1,1,1,3,3-pentafluorobutane), ...
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