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Browsing MIT Open Access Articles by Title

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  • Drake, Jeremy J.; Ratzlaff, Peter; Kashyap, Vinay; Huenemoerder, David P.; Wargelin, Bradford J.; Pease, Deron O. (IOP Publishing, 2014-02)
    Extensive X-ray and EUV photometric observations of the eclipsing RS CVn system AR Lac were obtained over the years 1997-2013 with the Chandra X-Ray Observatory Extreme-Ultraviolet Explorer (EUVE). During primary eclipse, ...
  • Qazi, Masood; Amerasekera, Ajith; Chandrakasan, Anantha P. (Institute of Electrical and Electronics Engineers (IEEE), 2013-10)
    In order to realize a digital system with no distinction between “on” and “off,” the computational state must be stored in nonvolatile memory elements. If the energy cost and time cost of managing the computational state ...
  • Qazi, Masood; Chandrakasan, Anantha P.; Amerasekera, Ajith (Institute of Electrical and Electronics Engineers (IEEE), 2013-02)
    Nonvolatile processing-continuously operating a digital circuit and retaining state through frequent power interruptions-creates new applications for portable electronics operating from harvested energy and high-performance ...
  • 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 ...
  • Ren, Y.; de Visser, P. J.; Hovenier, J. N.; Zhang, W.; Gao, J. R.; Klapwijk, T. M.; Shi, S. C.; Kao, T.-Y.; Kumar, S.; Reno, J. L.; Hu, Qing (2011-04)
    We report a set of measurements to demonstrate a new type of surface emitting distributed feedback (DFB) quantum cascade laser (QCL) operated at 3.5 THz as a local oscillator by pumping a superconducting hot-electron ...
  • 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 ...
  • Yang, Zehong; Zhao, Xiaojun (Dove Medical Press, 2011-02)
    RADA16-I peptide hydrogel, a type of nanofiber scaffold derived from self-assembling peptide RADA16-I, has been extensively applied to regenerative medicine and tissue repair in order to develop novel nanomedicine systems. ...
  • 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 ...
  • Adib, Fadel M.; Kabelac, Zachary E.; Katabi, Dina; Miller, Robert C. (Association for Computing Machinery (ACM), 2014-04)
    This paper introduces WiTrack, a system that tracks the 3D motion of a user from the radio signals reflected off her body. It works even if the person is occluded from the WiTrack device or in a different room. WiTrack ...
  • Li, Jingshuang; Fehler, Michael; Yang, Dinghui; Huang, Xueyuan (Society of Exploration Geophysicists, 2014-12)
    Reliable 3D imaging is a required tool for developing models of complex geologic structures. Reverse time migration (RTM), as the most powerful depth imaging method, has become the preferred imaging tool because of its ...
  • Chen, Hung-Wen; Lim, Jinkang; Xu, Shanhui; Yang, Zhongmin; Chang, Guoqing; Kaertner, Franz X. (SPIE, 2014-09)
    Many applications require GHz femtosecond pulses with the center wavelength tunable over a broad range. Recently we have demonstrated a 3-GHz, femtosecond Yb-fiber laser system with >12-W average power using the pre-chirp ...
  • 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 ...
  • Spies, Noah; Burge, Christopher B.; Bartel, David (Cold Spring Harbor Laboratory Press, 2013-09)
    Variation in protein output across the genome is controlled at several levels, but the relative contributions of different regulatory mechanisms remain poorly understood. Here, we obtained global measurements of decay and ...
  • Park, Sunghyun; Qazi, Masood; Peh, Li-Shiuan; Chandrakasan, Anantha P. (Institute of Electrical and Electronics Engineers (IEEE), 2013-03)
    Mesh NoCs are the most widely-used fabric in high-performance many-core chips today. They are, however, becoming increasingly power-constrained with the higher on-chip bandwidth requirements of high-performance SoCs. In ...
  • Paidimarri, Arun; Mercier, Patrick Philip; Chandrakasan, Anantha P.; Nadeau, Phillip (Institute of Electrical and Electronics Engineers (IEEE), 2012-06)
    A 2.4GHz TX in 65nm CMOS defines three channels using three high-Q FBARs and supports OOK, BPSK and MSK. The oscillators have -132dBc/Hz phase noise at 1MHz offset, and are multiplexed to an efficient resonant buffer. ...
  • Robinson, Julia M.; Tlais, Sami F.; Fong, Jennie; Danheiser, Rick Lane (Elsevier, 2011-09)
    A [4+4] annulation strategy for the synthesis of eight-membered carbocycles is reported that proceeds via a cascade involving two pericyclic processes. In the first step, the [4+2] cycloaddition of a conjugated enyne with ...
  • Zellem, Robert T.; Knutson, Heather A.; Griffith, Caitlin A.; Showman, Adam P.; Fortney, Jonathan J.; Cowan, Nicolas B.; Agol, Eric; Burrows, Adam; Charbonneau, David; Deming, Drake; Laughlin, Gregory; Langton, Jonathan; Lewis, Nicole (IOP Publishing, 2014-07)
    The hot Jupiter HD 209458b is particularly amenable to detailed study as it is among the brightest transiting exoplanet systems currently known (V-mag = 7.65; K-mag = 6.308) and has a large planet-to-star contrast ratio. ...
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