Catálogo de publicaciones - revistas

<jats:p>Robot aircraft that fly like birds could open new vistas in maneuverability, if designers can forge a productive partnership with an old enemy: unsteady airflow.</jats:p>

<jats:p>A new 19-gram crewless aircraft called the Nano Hummingbird with a wingspan of 17 centimeters can hover in place and fly in any direction (including backward) as fast as 18 kilometers per hour.</jats:p>

<jats:p>Supercomputing power now makes it possible to compute the properties of thousands of crystalline materials in a flash and is expected to guide experimentalists where to search for the next best things.</jats:p>

<jats:p>As fluid injections into Earth's crust trigger quakes across the United States, researchers are scrambling to learn how to avoid making more.</jats:p>

<jats:p> Adler <jats:italic>et al</jats:italic> . (Reports, 23 September 2011, p. 1750) analyzed the standardized sampling data from 48 herbaceous-dominated plant communities and concluded that “Productivity is a poor predictor of plant species richness” at fine-scale. However, their method was biased toward site-number–dominated plant communities. They also failed to provide enough data for regional analysis and detailed information for within-site analysis. </jats:p>

<jats:p> Adler <jats:italic>et al</jats:italic> . (Reports, 23 September 2011, p. 1750) reported “weak and variable” relationships between productivity and species richness and dispute the “humped-back” model (HBM) of plant diversity. We show that their analysis lacks sufficient high-productivity sites, ignores litter, and excludes anthropogenic sites. If corrected, the data set of Adler <jats:italic>et al</jats:italic> . would apparently yield strong HBM support. </jats:p>