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Browsing MIT Open Access Articles by Title

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  • Egan, Kevin; Tseng, Yu-Ting; Holzschuch, Nicolas; Durand, Fredo; Ramamoorthi, Ravi (Association for Computing Machinery (ACM), 2009-08)
    Motion blur is crucial for high-quality rendering, but is also very expensive. Our first contribution is a frequency analysis of motion-blurred scenes, including moving objects, specular reflections, and shadows. We show ...
  • Ren, Y.; Hayton, D. J.; Hovenier, J. N.; Cui, M.; Gao, J. R.; Klapwijk, T. M.; Shi, S. C.; Kao, Tsung-Yu; Hu, Q.; Reno, J. L. (American Institute of Physics, 2012-09)
    We demonstrate an experimental scheme to simultaneously stabilize the frequency and amplitude of a 3.5 THz third-order distributed feedback quantum cascade laser as a local oscillator. The frequency stabilization has been ...
  • Rahul, Hariharan Shankar; Edalat, Farinaz; Katabi, Dina; Sodini, Charles G. (Association for Computing Machinery (ACM), 2009-09)
    There has been burgeoning interest in wireless technologies that can use wider frequency spectrum. Technology advances, such as 802.11n and ultra-wideband (UWB), are pushing toward wider frequency bands. The analog-to-digital ...
  • Perreault, David J.; Selders, Robert L.; Kassakian, John G. (Institute of Electrical and Electronics Engineers (IEEE), 1998-07)
    A new current-sharing technique for paralleled power converters, which is based on frequency encoding of the current-sharing information, is introduced. The approach has significant advantages over existing methods, including ...
  • Tsai, Tsung-Han; Zhou, Chao; Adler, Desmond C.; Fujimoto, James G. (Optical Society of America, 2009-11)
    We demonstrate a frequency comb (FC) swept laser and a frequency comb Fourier domain mode locked (FC-FDML) laser for applications in optical coherence tomography (OCT). The fiber-based FC swept lasers operate at a sweep ...
  • Tsai, Tsung-Han; Zhou, Chao; Adler, Desmond C.; Fujimoto, James G. (SPIE, 2010-02)
    We demonstrate a frequency comb (FC) swept laser and a frequency comb Fourier domain mode locked (FC-FDML) laser for applications in optical coherence tomography (OCT). The fiber-based FC swept lasers operate at a sweep ...
  • Dawson, Joel L.; Bohorquez, Jose L.; Chandrakasan, Anantha P. (Institute of Electrical and Electronics Engineers, 2009-12)
    Since its invention in 1922, the super-regenerative amplifier (SRA) has been used in a variety of short-range, low-power, and/or low-cost wireless systems due to its simple implementation and excellent performance for a ...
  • Degen, Christian; Poggio, M.; Oosterkamp, T. H.; Mamin, H. J.; Rugar, D. (American Institute of Physics, 2010-02)
    Frequency domain multiplexing, using an actively damped micromechanical cantilever, is used to detect multiple force signals simultaneously. The measurement principle is applied to magnetic resonance force microscopy to ...
  • Strazzo, Sarah; Elsner, James B.; Trepanier, Jill C.; Emanuel, Kerry Andrew (American Geophysical Union (AGU), 2013-07)
    Synthetic hurricane track data generated from a downscaling approach are compared to best-track (observed) data to analyze differences in regional frequency, intensity, and sensitivity of limiting intensity to sea surface ...
  • Ren, Y.; Hovenier, J. N.; Cui, M.; Hayton, D. J.; Gao, J. R.; Klapwijk, T. M.; Shi, S. C.; Reno, J. L.; Kao, Tsung-Yu; Hu, Qing (American Institute of Physics (AIP), 2012-01)
    We report frequency locking of two 3.5-THz third-order distributed feedback (DFB)quantum cascade lasers(QCLs) by using methanol molecular absorption lines, a proportional-integral-derivative controller, and a NbN bolometer. ...
  • Techapiesancharoenkij, Ratchatee; Kostamo, Jari; Allen, Samuel Miller; O'Handley, Robert C. (American Institute of Physics, 2009-05)
    A prototype of Ni–Mn–Ga based ferromagnetic-shape-memory-alloy (FSMA) actuator was designed and built; an acoustic-assist technique was applied to the actuator to enhance its performance. A piezoelectric stack actuator was ...
  • Rodriguez-Wong, Alejandro; Ilic, Ognjen; Bermel, Peter A.; Celanovic, Ivan; Joannopoulos, John D.; Soljacic, Marin; Johnson, Steven G. (American Physical Society (APS), 2011-09)
    We demonstrate the possibility of achieving enhanced frequency-selective near-field radiative heat transfer between patterned (photonic-crystal) slabs at designable frequencies and separations, exploiting a general numerical ...
  • Hu, Qing; Kumar, Sushil; Lee, Alan; Qin, Qi; Reno, John L. (Institute of Electrical and Electronics Engineers, 2009-04)
    We demonstrate a tunable terahertz quantum cascade laser using an abutted silicon lens and grating feedback. The device tunes discontinuously over 160 GHz with a center frequency of 4.4 THz.
  • Bush, John W. M. (American Meteorological Society, 2009-04)
    A cold event at around 8200 calendar years BP and the release, at around that time, of a huge freshwater outburst from ice-dammed glacial Lake Agassiz have lent support to the idea that the flood triggered the cold event. ...
  • Imperiali, Barbara; Socher, Elke Ricarda (Wiley Blackwell, 2012-12)
    The FRET-Capture approach exploits a bound solvatochromic fluorophore, 4-N,N-dimethylamino-1,8-naphthalimide, as a FRET donor in both inter- and intramolecular energy transfer. A unique feature of this method is the ...
  • Alabi, Christopher Akinleye; Love, Kevin T.; Sahay, Gaurav; Stutzman, Tina M.; Young, Whitney T.; Langer, Robert; Anderson, Daniel Griffith (American Chemical Society, 2012-06)
    The assembly, stability, and timely disassembly of short interfering RNA (siRNA) nanocomplexes have the potential to affect the efficiency of siRNA delivery and gene silencing. As such, the design of new probes that can ...
  • Benthuysen, Jessica; Thomas, Leif N. (American Meteorological Society, 2012-09)
    Although atmospheric forcing by wind stress or buoyancy flux is known to change the ocean’s potential vorticity (PV) at the surface, less is understood about PV modification in the bottom boundary layer. The adjustment of ...
  • Kim, Dallwoo; Ito, Akemi; Ishikawa, Yasuhiro; Osawa, Katsuyuki; Iwasaki, Yoshiyuki (Elsevier, 2013-06)
    The use of iron pistons is increasing due to the higher power requirements of diesel truck engines. Expansion of the iron piston is a common concern. The purpose of this study is to clarify the lubrication conditions of ...
  • Kallis, Giorgos; Kalush, Michael; O.'Flynn, Hugh; Rossiter, Jack; Ashford, Nicholas A. (MDPI AG, 2013-04)
    This article explores the pros and cons for reducing working hours in Europe. To arrive to an informed judgment we review critically the theoretical and empirical literature, mostly from economics, concerning the relation ...
  • Veprek, S.; Argon, Ali Suphi; Zhang, R. F. (American Physical Society, 2009-01)
    To obtain a deeper understanding of the mechanism of plastic deformation and failure in superhard nanocomposites and heterostructures we studied, by means of the ab initio density functional theory, the stress-strain ...
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