Abstract. Gravitational instabilities can be significant threats to populations and infrastructure. For hazard assessment, it is important estimate the geometry volume of potential unstable masses. This characterization particularly difficult in volcanic contexts due succession deposition erosion phases. Indeed, results complex layering geometries which interfaces between geological layers may ...

Wireless video broadcast plays an important role in multimedia communication with the emergence of mobile video applications. However, conventional video broadcast designs suffer from a cliff effect due to separated source and channel encoding. The newly proposed SoftCast scheme employs a cross-layer design, whose reconstructed video quality is proportional to the channel condition. In this pap...

-Cliff Swallow (Hirundo pyrrhonota) chicks were played calls of parents and unrelated (control) adults at 9 and 18 days of age. Younger chicks showed no difference in the frequency of their antiphonal begging calls to parental vs. control calls. The older, nearfledging chicks, however, responded significantly more to parental calls than to control calls: 78% of their total antiphonal calls were...