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We review the biogeography of microorganisms in light of the biogeography of macroorganisms. A large body of research supports the idea that free-living microbial taxa exhibit biogeographic patterns. Current evidence confirms that, as proposed by the Baas-Becking hypothesis, 'the environment selects' and is, in part, responsible for spatial variation in(More)
' We report progress on a new approach to combatting illiteracy-getting computers to listen to children read aloud. We describe a fully automated prototype coach for oral reading. It displays a story on the screen, listens as a child reads it, and decides whether and how to intervene. We report on pilot experiments with low-reading second graders to test(More)
With the quantity of genomic data increasing at an exponential rate, it is imperative that these data be captured electronically, in a standard format. Standardization activities must proceed within the auspices of open-access and international working bodies. To tackle the issues surrounding the development of better descriptions of genomic investigations,(More)
some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it. some third party content may be suppressed(More)
What: Project LISTEN is developing a novel weapon against illiteracy: an automated reading coach that displays a story on a computer screen, listens to a child read it aloud, and helps where 1. needed. The coach provides a combination of reading and listening , in which the child reads wherever possible, and the coach helps wherever necessary. We(More)
The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. ABSTRACT The inherent control flexibility implied by solid-state lighting – united with the rich details offered by sensor networks – prompts us to rethink lighting control. In this research, we propose several techniques for measuring work(More)
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Detecting a Radio Frequency device such as a Push-to-Talk (PTT) radio has several military and civilian applications. Detecting PTT radios can be used in search and rescue applications and in providing early detection and warning of existing PTT radios that were previously unknown. This study analyzes the ability of using two tone intermodulation distortion(More)
The mechanism leading to RT ferromagnetism in Gd-doped GaN is not well understood. Oxygen impurities have been proposed as a possible contributor to ferromagnetic behavior in Ga<inf>1&#x2212;x</inf>Gd<inf>x</inf>N films but the physical mechanism is not clear. In this work, Ga<inf>1&#x2212;x</inf>Gd<inf>x</inf>N thin films were grown by MOCVD using two(More)