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dspace.mit.edu 檢索結果共 84617 筆,本頁資料從第 193 筆到第 204 筆

This paper addresses a problem of estimating time-varying, local concentrations of signal molecules with a carbon-nanotube (CNT)-based sensor array system, which sends signals triggered by monomolecular adsorption/desorption events of proximate molecules on the surfaces of the sensors. Such sensors work on nano-scale phenomena and show inherently stochastic non-Gaussian....

By Hong Jang,Jay H. Lee,Richard D. Braatz--Public Library of Science--2016-01-05
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Tumorigenesis is a complex, multistep process that depends on numerous alterations within the cell and contribution from the surrounding stroma. The ability to model macroscopic tumor evolution with high fidelity may contribute to better predictive tools for designing tumor therapy in the clinic. However, attempts to model tumor growth have mainly been developed and val....

By Charalambos Loizides,Demetris Iacovides,Marios M. Hadjiandreou,Gizem Rizki,Achilleas Achilleos,Kat St--Public Library of Science--2016-01-05
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As part of the Young Stellar Object VARiability (YSOVAR) program, we monitored NGC 1333 for ~35 days at 3.6 and 4.5 μm using the Spitzer Space Telescope. We report here on the mid-infrared variability of the point sources in the ~10' × ~20' area centered on 03:29:06, +31:19:30 (J2000). Out of 701 light curves in either channel, we find 78 variables over the YSOVAR cam....

By L. M. Rebull,J. R. Stauffer,A. M. Cody,L. A. Hillenbrand,K. Poppenhaeger,S. J. Wolk--IOP Publishing--2016-01-05
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We present the results of a pilot study search for fast radio bursts (FRBs) using the Murchison Widefield Array (MWA) at low frequencies (139–170 MHz). We utilized MWA data obtained in a routine imaging mode from observations where the primary target was a field being studied for Epoch of Reionization detection. We formed images with 2 s time resolution and 1.28 MHz f....

By S. J. Tingay,C. M. Trott,R. B. Wayth,G. Bernardi,J. D. Bowman,F. Briggs,A. A. Deshpand--IOP Publishing--2016-01-05
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The Wisdom–Holman mapping method and its variations have become a mainstay of research in solar system dynamics. But the method is not without its limitations. Rauch & Holman noted that at large eccentricities sufficiently small steps must be taken to resolve the pericenter. In this paper, I explore in more detail what it means to resolve the pericenter.....

By Jack Wisdom--IOP Publishing--2016-01-05
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We present an IR-monitoring survey with the Spitzer Space Telescope of the star-forming region GGD 12-15. More than 1000 objects were monitored, including about 350 objects within the central 5', which is found to be especially dense in cluster members. The monitoring took place over 38 days and is part of the Young Stellar Object VARiability project. The region was als....

By Scott J. Wolk,Katja Poppenhaeger,A. M. Cody,L. M. Rebull,J. Forbrich,R. A. Gutermuth,L. A. H--IOP Publishing--2016-01-05
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We describe directed searches for continuous gravitational waves (GWs) in data from the sixth Laser Interferometer Gravitational-wave Observatory (LIGO) science data run. The targets were nine young supernova remnants not associated with pulsars; eight of the remnants are associated with non-pulsing suspected neutron stars. One target's parameters are uncertain enough t....

By Lisa Barsotti,Sebastien Biscans,Nancy Aggarwal,Timothy P. Bodiya,N. M. Brown,Aaron Buikema,Freder Don--IOP Publishing--2016-01-05
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The response of simple vibratory systems containing structural damping is studied analytically when the excitation is an impulse and when the excitation is stationary random vibration. It is found that in a strict sense the assumption of ideal structural damping represents a physically unrealizable model because a small precursor response occurs before the application ....

By Stephen H. Crandall----2016-01-05
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Many excitatory synapses contain high levels of mobile zinc within glutamatergic vesicles. Although synaptic zinc and glutamate are coreleased, it is controversial whether zinc diffuses away from the release site or whether it remains bound to presynaptic membranes or proteins after its release. To study zinc transmission and quantify zinc levels, we required a high-aff....

By Charles T. Anderson,Robert J. Radford,Daniel Y. Zhang,Ulf-Peter Apfel,Stephen J Lippard--National Academy of Sciences (U.S.)--2016-01-04
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Diatoms and other phytoplankton play a crucial role in the global carbon cycle, fixing CO[subscript 2] into organic carbon, which may then be exported to depth via sinking particles. The molecular diversity of this organic carbon is vast and many highly bioactive molecules have been identified. Polyunsaturated aldehydes (PUAs) are bioactive on various levels of the mari....

By Kay D. Bidle,Benjamin A. S. Van Mooy,Bethanie Rachele Edwards--National Academy of Sciences (U.S.)--2016-01-04
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We infer global and regional emissions of five of the most abundant hydrofluorocarbons (HFCs) using atmospheric measurements from the Advanced Global Atmospheric Gases Experiment and the National Institute for Environmental Studies, Japan, networks. We find that the total CO[subscript 2]-equivalent emissions of the five HFCs from countries that are required to provide d....

By Mark F. Lunt,Matthew Rigby,Anita L. Ganesan,Alistair J. Manning,Ronald G. Prinn,Sim O’Doherty--National Academy of Sciences (U.S.)--2016-01-04
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During its asexual development within the red blood cell (RBC), Plasmodium falciparum (Pf), the most virulent human malaria parasite, exports proteins that modify the host RBC membrane. The attendant increase in cell stiffness and cytoadherence leads to sequestration of infected RBCs in microvasculature, which enables the parasite to evade the spleen, and leads to organ....

By Yao Zhang,Changjin Huang,Sangtae Kim,Mahdi Golkaram,Matthew W. A. Dixon,Leann Tilley,Ju Li--National Academy of Sciences (U.S.)--2016-01-04
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