Long Excursion.—The Pentland Hills

Summary : ” Eigenfaces for Recognition ” ( M . Turk , A . Pentland )

”Eigenfaces for Recognition” seeks to implement a system capable of efficient, simple, and accurate face recognition in a constrained environment (such as a household or an office). The system does not depend on 3-D models or intuitive knowledge of the structure of the face (eyes, nose, mouth). Classification is instead performed using a linear combination of characteristic features (eigenfaces...

Thad Starner , Brad Rhodes , Brian Clarkson , and Alex Pentland

For most computer systems, even virtual reality systems, sensing techniques are a means of getting input directly from the user. However, wearable sensors and computers offer a unique opportunity to redirect sensing technology toward recovering more general user context. Wearable computers have the potential to “see” as the user sees, “hear” as the user hears, and experience the life of the use...

Mole Hills from Mountains

Long range transport and fate of a stratospheric volcanic cloud from Soufriere Hills volcano, Montserrat

Volcanic eruptions emit gases, ash particles and hydrometeors into the atmosphere, occasionally reaching heights of 20 km or more, to reside in the stratospheric overworld where they affect the radiative balance of the atmosphere and the Earth’s climate. Here we use satellite measurements and a Lagrangian particle dispersion model to determine the mass loadings, vertical penetration, horizontal...

Filariasis in the Mikir Hills