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Browsing MIT Open Access Articles by Title

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  • Cushing, Michael C.; Looper, Dagny; Burgasser, Adam J.; Kirkpatrick, J. Davy; Faherty, Jacqueline; Cruz, Kelle L.; Sweet, Anne; Sanderson, Robyn Ellyn (American Astronomical Society, 2009-04)
    We present the serendipitous discovery of an L subdwarf in the Two Micron All Sky Survey (2MASS) J06164006–6407194, in a search of the 2MASS for T dwarfs. Its spectrum exhibits features indicative of both a cool and metal ...
  • Doughty, David M.; Hunter, R. C.; Summons, Roger Everett; Newman, Dianne K. (John Wiley & Sons, Inc., 2009-10)
    2-Methylhopanes, molecular fossils of 2-methylbacteriohopanepolyol (2-MeBHP) lipids, have been proposed as biomarkers for cyanobacteria, and by extension, oxygenic photosynthesis. However, the robustness of this interpretation ...
  • Dong, Hongping; Chang, David C.; Ho Chia Hua, Maggie; Lim, Siew Pheng; Chionh, Yok Hian; Hia, Fabian; Lee, Yie Hou; Kukkaro, Petra; Lok, Shee-Mei; Dedon, Peter C.; Shi, Pei-Yong (Public Library of Science, 2012-04)
    RNA modification plays an important role in modulating host-pathogen interaction. Flavivirus NS5 protein encodes N-7 and 2′-O methyltransferase activities that are required for the formation of 5′ type I cap (m[superscript ...
  • Do, Loi H.; Lippard, Stephen J. (American Chemical Society (ACS), 2009-10)
    A series of 2-phenoxypyridyl and 2-phenoxyimino ligands, H[subscript 2]L[superscript R,R′] [2,2′-(5,5′-(1,2-phenylenebis(ethyne-2,1-diyl))bis(pyridine-5,2-diyl))diphenol, where R = H, Me, or t-Bu, and R′ = H or Ph] and ...
  • Kim, Dae-Hyun; del Alamo, Jesus A. (Institute of Electrical and Electronics Engineers, 2010-07)
    We present 30-nm InAs pseudomorphic HEMTs (PHEMTs) on an InP substrate with record fT characteristics and well-balanced fT and f[subscript max] values. This result was obtained by improving short-channel effects through ...
  • Kim, Tae-Woo; Kim, Dae-Hyun; del Alamo, Jesus A. (Institute of Electrical and Electronics Engineers, 2010-03)
    We have fabricated 30 nm In0.7Ga0.3As Inverted-Type HEMTs with outstanding logic performance, scalability and high frequency characteristics. The motivation for this work is the demonstration of reduced gate leakage current ...
  • Osgood, R. M.; Kimball, B. R.; Geis, Michael W.; Turner, George W.; Lyszczarz, Theodore M.; Molnar, Richard J. (SPIE, 2010-02)
    The optical switching times of liquid-crystal cells using 5CB, 5OCB and PCH5 liquid crystal materials have been characterized as a function of applied voltage, V, and temperature, T. The transition time from 90 to 10 % ...
  • Cho, Taeg Sang; Lee, Kyeong-Jae; Kong, Jing; Chandrakasan, Anantha P. (Institute of Electrical and Electronics Engineers, 2009-01)
    This paper presents an energy-efficient chemical sensor system that uses carbon nanotubes (CNT) as the sensing medium. The room-temperature operation of CNT sensors eliminates the need for micro hot-plate arrays, which ...
  • Dawson, Joel L.; Chandrakasan, Anantha P.; Bohorquez, Jose L. (Institute of Electrical and Electronics Engineers, 2009-03)
    Recent advances in the medical field are spurring the need for ultra-low power transceivers for wireless communication with medical implants. To deal with the growing demand for medical telemetry, the FCC commissioned the ...
  • Kim, Jun Ki; Yun, Seok Hyun (Andy); Choi, Jin Woo (SPIE, 2013-04)
    Miniature endoscopic probes offer a solution for deep brain imaging by overcoming the limited depth of intravital microscopy. We describe a small-diameter (350 μm) graded-index optical probe with a side-view design for in ...
  • Snavely, Noah; Anderson, Ross W.; Cho, Peter L. (SPIE, 2010-04)
    Recent work in computer vision has demonstrated the potential to automatically recover camera and scene geometry from large collections of uncooperatively-collected photos. At the same time, aerial ladar and Geographic ...
  • Zorzos, Anthony Nicholas; Scholvin, Jorg; Boyden, Edward Stuart; Fonstad, Clifton G., Jr. (Optical Society of America, 2012-11)
    To deliver light to the brain for neuroscientific and neuroengineering applications like optogenetics, in which light is used to activate or silence neurons expressing specific photosensitive proteins, optical fibers are ...
  • Rivers, Alec Rothmyer; Durand, Fredo; Igarashi, Takeo (Association for Computing Machinery (ACM), 2010-07)
    We present a new sketch-based modeling approach in which models are interactively designed by drawing their 2D silhouettes from different views. The core idea of our paper is to limit the input to 2D silhouettes, removing ...
  • Raskar, Ramesh; Agrawal, Amit; Chang, Ju Yong (Institute of Electrical and Electronics Engineers, 2009-08)
    We present a system for fast model-based segmentation and 3D pose estimation of specular objects using appearance based specular features. We use observed (a) specular reflection and (b) specular flow as cues, which are ...
  • Berdichevsky, Alina; Nedelcu, Simona; Boulias, Konstantinos; Bishop, Nicholas A.; Guarente, Leonard Pershing; Horvitz, H. Robert (National Academy of Sciences, 2010-11)
    Studies of long-lived Caenorhabditis elegans mutants have identified several genes that function to limit lifespan, i.e., loss-of-function mutations in these genes promote longevity. By contrast, little is known about ...
  • Sinangil, Mahmut Ersin; Verma, Naveen; Chandrakasan, Anantha P. (Institute of Electrical and Electronics Engineers, 2009-11)
    8T bit-cells hold great promise for overcoming device variability in deeply scaled SRAMs and enabling aggressive voltage scaling for ultra-low-power. This paper presents an array architecture and circuits with minimal ...
  • Stojanovic, Vladimir Marko; Kim, Byungsub (Institute of Electrical and Electronics Engineers, 2009-05)
    This paper presents a transceiver for fast and energy-efficient global on-chip communication, consisting of a nonlinear charge-injecting (CI) 3-tap transmit filter (TX) and a sampling receiver (RX) with transimpedance ...
  • Suntharalingam, Vyshnavi; Berger, Robert; Clark, Stewart; Knecht, Jeffrey M.; Messier, Andrew V.; Newcomb, Kevin L.; Rathman, Dennis D.; Slattery, Richard L.; Soares, Antonio M.; Stevenson, Charles; Warner, Keith; Young, Douglas J.; Ang, Lin Ping; Mansoorian, Barmak; Shaver, David C. (Institute of Electrical and Electronics Engineers, 2009-02)
    The dominant trend with conventional image sensors is toward scaled-down pixel sizes to increase spatial resolution and decrease chip size and cost. While highly capable chips, these monolithic image sensors devote substantial ...
  • Schattenburg, Mark Lee; Heilmann, Ralf K.; Chang, Chih-Hao; Ahn, Minseung; Padmore, Howard A.; Yashchuk, Valeriy V.; Gullikson, Eric M.; Salmassi, Farhad; Cambie, Rossana; Anderson, Erik H.; Voronov, Dmitriy L. (The International Society for Optical Engineering, 2009-09)
    We report on recent progress in developing diffraction gratings which can potentially provide extremely high spectral resolution of 10[superscript 5]-10[superscript 6] in the EUV and soft x-ray photon energy ranges. Such ...
  • del Alamo, Jesus A.; Kim, Dae-Hyun; Chen, Peter; Ha, Wonill; Urteaga, Miguel; Brar, Berinder (Institute of Electrical and Electronics Engineers (IEEE), 2010-12)
    We have demonstrated 50-nm enhancement-mode (E-mode) In[subscript 0.7]Ga[subscript 0.3]As PHEMTs with f[subscript max] in excess of 1 THz. The devices feature a Pt gate sinking process to effectively thin down the In[subscript ...
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