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The net ecosystem exchange of carbon dioxide was measured by eddy covariance methods for 3 years in two old-growth forest sites near Santarém, Brazil. Carbon was lost in the wet season and gained in the dry season, which was opposite to the seasonal cycles of both tree growth and model predictions. The 3-year average carbon loss was 1.3 (confidence(More)
[1] The Amazon Basin is crucial to global circulatory and carbon patterns due to the large areal extent and large flux magnitude. Biogeophysical models have had difficulty reproducing the annual cycle of net ecosystem exchange (NEE) of carbon in some regions of the Amazon, generally simulating uptake during the wet season and efflux during seasonal drought.(More)
PURPOSE This study examined the usefulness of the Nonword Repetition Test (NRT; C. Dollaghan & T. F. Campbell, 1998) with 4-year-old children and the relationship among the NRT, language, and other aspects of mental processing. METHOD The NRT was administered to 64 children at 4 years of age; 44 had a history of typical language development (HTD), and 20(More)
Surface ecophysiology at five sites in tropical South America across vegetation and moisture gradients is investigated. From the moist northwest (Manaus) to the relatively dry southeast (Pé de Gigante, state of São Paulo) simulated seasonal cycles of latent and sensible heat, and carbon flux produced with the Simple Biosphere Model (SiB3) are confronted(More)
INTRODUCTION Conversation is easy. We converse with other people daily. Some of the communications are oral, occurring face-to-face or over the telephone. Other conversations occur over a chain of e-mails or in real time, using instant messaging or chat room technology. Sometimes the content of conversation is important and informative. Conversations can(More)
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. [1] Titan has few impact craters, suggesting that its surface is geologically(More)
The Altera EPXA10DB is a development platform for reconfigurable computing, coupling an ARM microprocessor and a modest Altera Programmable Logic Device (PLD) on the same chip. Streams-C is a "C" style language that addresses hardware and software generation by extending the C language. A new port of Streams-C for the EPXA10DB is being developed to provide(More)
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