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Browsing MIT Open Access Articles by Title

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  • Kashif, Faisal Mahmood; Shafi, Imran; Ahmad, Jamil; Shah, Syed Ismail; Ikram, Ataul Aziz; Khan, Adnan Ahmad; Bashir, Sajid (European Association for Signal Processing / Hindawi, 2010-01)
    his work evaluates the performance of high-resolution quadratic time-frequency distributions (TFDs) including the ones obtained by the reassignment method, the optimal radially Gaussian kernel method, the t-f autoregressive ...
  • Regev, Aviv; Brar, Gloria A.; Yassour, Moran; Friedman, Nir; Ingolia, Nicholas T.; Weissman, Jonathan S. (American Association for the Advancement of Science (AAAS), 2011-12)
    Meiosis is a complex developmental process that generates haploid cells from diploid progenitors. We measured messenger RNA (mRNA) abundance and protein production through the yeast meiotic sporulation program and found ...
  • Ragan, Timothy; Sylvan, Jeremy D.; Kim, Ki Hean; Huang, Hayden; Bahlmann, Karsten; Lee, Richard T.; So, Peter T. C. (SPIE, 2007-02)
    Three-dimensional (3-D) tissue imaging offers substantial benefits to a wide range of biomedical investigations from cardiovascular biology, diabetes, Alzheimer’s disease to cancer. Two-photon tissue cytometry is a novel ...
  • Zhekov, Svetozar A.; McCray, Richard; Dewey, Dan; Canizares, Claude R.; Borkowski, Kazimierz J.; Burrows, David N.; Park, Sangwook (American Astronomical Society, 2009-02)
    We present an extended analysis of the deep Chandra LETG and HETG observations of the supernova remnant 1987A (SNR 1987A) carried out in 2007. The global fits to the grating spectra show that the temperature of the X-ray ...
  • Schulz, Norbert S.; Gu, Ming F.; Nowak, Michael A.; Canizares, Claude R. (American Astronomical Society, 2009-04)
    High-resolution X-ray absorption spectroscopy is a powerful diagnostic tool for probing chemical and physical properties of the interstellar medium (ISM) at various phases. We present detections of K transition absorption ...
  • Marshall, Herman Lee; Canizares, Claude R.; Schulz, Norbert S. (IOP Publishing, 2002-01)
    We present observations of SS 433 using the Chandra High Energy Transmission Grating Spectrometer. Many emission lines of highly ionized elements are detected with relativistic blue and red Doppler shifts. The lines are ...
  • Wynn, Charles M.; Palmacci, Stephen; Clark, Michelle L.; Kunz, Roderick R. (SPIE, 2013-08)
    Lincoln Laboratory of Massachusetts Institute of Technology has developed a technique known as dynamic photoacoustic spectroscopy (DPAS) that could enable remote detection of trace gases via a field-portable laser-based ...
  • Schulein, Robert T.; Grein, Matthew E.; Yoon, Jung Uk; Lennon, Donna M.; Geis, Michael W.; Lyszczarz, Theodore M.; Spector, Steven Jay; Zhou, G. R.; Smith, Henry Ignatius; Ram, Rajeev J.; Popovic, Milos; Perrott, Michael H.; Park, M.; Orcutt, Jason Scott; Motamedi, Ali R.; Kim, M.; Kim, J.; Khilo, Anatol M.; Kaertner, Franz X.; Ippen, Erich P.; Hoyt, Judy L.; Gan, F.; DiLello, Nicole Ann; Dahlem, Marcus Vinicius Sobral; Chen, J.; Byun, Hyunil; Birge, Jonathan R.; Araghchini, Mohammad; Amatya, Reja; Holzwarth, Charles W.; Shmulovich, J.; Hanjani, A.; Frolov, S. (The International Society for Optical Engineering, 2009-02)
    Sampling rates of high-performance electronic analog-to-digital converters (ADC) are fundamentally limited by the timing jitter of the electronic clock. This limit is overcome in photonic ADC's by taking advantage of the ...
  • Karaman, Sertac; Frazzoli, Emilio (Institute of Electrical and Electronics Engineers, 2012-05)
    Inspired by birds flying through cluttered environments such as dense forests, this paper studies the theoretical foundations of high-speed motion through a randomly-generated obstacle field. Assuming that the locations ...
  • Chen, Xiangyu; Lee, Kyeong-Jae; Akinwande, Deji; Close, Gael F.; Yasuda, Shinichi; Paul, Bipul; Fujita, Shinobu; Kong, Jing; Wong, H. -S. Philip (Institute of Electrical and Electronics Engineers (IEEE), 2010-03)
    We have successfully experimentally integrated graphene interconnects with commercial 0.25 ¿m technology CMOS ring oscillator circuit using conventional fabrication techniques, and demonstrated high speed on-chip graphene ...
  • Aguirre, Aaron Dominic; Sawinski, Juergen; Huang, Shu-Wei; Zhou, Chao; Denk, Winfried; Fujimoto, James G. (Optical Society of America, 2010-02)
    Optical coherence microscopy (OCM) is a promising technique for high resolution cellular imaging in human tissues. An OCM system for high-speed en face cellular resolution imaging was developed at 1060 nm wavelength at ...
  • Kinsy, Michel A.; Majstorovic, Dusan; Haessig, Pierre; Poon, Jason; Celanovic, Nikola; Celanovic, Ivan; Devadas, Srinivas (Mesago PCIM GmbH, 2011-05)
    This paper details the design and application of a new ultra-high speed real-time simulation for Hardware-in-the-Loop (HiL) testing and design of high-power power electronics systems. Our real-time hardware emulation for ...
  • Jayaraman, V.; Potsaid, B.; Jiang, J.; Cole, G. D.; Robertson, M. E.; Burgner, C. B.; John, D. D.; Choi, W.; Liu, J.; Stein, B. A.; Sanders, S. T.; Cable, A. E.; Grulkowski, Ireneusz; Tsai, Tsung-Han; Fujimoto, James G. (SPIE, 2013-05)
    In the last 2 years, the field of micro-electro-mechanical systems tunable vertical cavity surface-emitting lasers (MEMS-VCSELs) has seen dramatic improvements in laser tuning range and tuning speed, along with expansion ...
  • Albrecht, Simon H.; Winn, Joshua Nathan; Butler, R. Paul; Crane, Jeffrey D.; Shectman, Stephen A.; Thompso, Ian B.; Hirano, Teruyuki; Wittenmyer, Robert A. (IOP Publishing, 2011-12)
    We measure a tilt of 86° ± 6° between the sky projections of the rotation axis of the WASP-7 star and the orbital axis of its close-in giant planet. This measurement is based on observations of the Rossiter-McLaughlin (RM) ...
  • Somekawa, Hidetoshi; Schuh, Christopher A. (Cambridge University Press (Materials Research Society), 2012-03)
    The effects of temperature and alloying elements on deformation in the high-strain-rate regime were investigated by testing fine-grained magnesium alloys with an average grain size of 2 ∼ 3 μm by a nanoindentation technique. ...
  • Tang, Evelyn May Yin; Mei, Jiawei; Wen, Xiao-Gang (American Physical Society, 2011-06)
    We show that a suitable combination of geometric frustration, ferromagnetism, and spin-orbit interactions can give rise to nearly flatbands with a large band gap and nonzero Chern number. Partial filling of the flatband ...
  • Wade, Aaron; Fedorov, Georgy; Smirnov, Dmitry; Williams, Benjamin S.; Kumar, Sushil; Hu, Qing; Reno, John L. (Institute of Electrical and Electronics Engineers (IEEE), 2009-08)
    We demonstrate magnetic field assisted, (sub)THz quantum cascade laser operating above 200 K. This is achieved through the application of strong magnetic fields which provide an additional lateral confinement in order to ...
  • Chan, Chun Wang Ivan; Hu, Qing; Qin, Qi; Kumar, Sushil; Reno, John L. (SPIE, 2011-02)
    We demonstrate a terahertz quantum-cascade laser (QCL) operating significantly above the temperature of hv/kB, which had so-far been been an empirical limitation for the maximum operating temperature of these devices. With ...
  • Iwasa, Yukikazu; Bascunan, Juan; Hahn, Seung-Yong; Tomita, Masaru; Yao, Weijun (Institute of Electrical and Electronics Engineers (IEEE), 2010-06)
    This paper describes the NMR/MRI magnets that are currently being developed at the MIT Francis Bitter Magnet Laboratory: 1) a 1.3 GHz NMR magnet; 2) a compact NMR magnet assembled from YBCO annuli; and 3) a persistent-mode, ...
  • Wang, Fa; Xiang, Yuan-Yuan; Wang, Da; Wang, Qiang-Hua; Lee, Dung-Hai (American Physical Society, 2012-10)
    In several recent experiments the superconducting gap of a single-unit-cell-thick FeSe film on SrTiO[subscript 3] substrate has been observed by scanning tunneling spectroscopy and angle-resolved photoemission spectroscopy. ...
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