Carnegie Blows Up Biodiversity

Beefing up biodiversity issues

The many disappointments about the achievements on protecting biodiversity in the year many targets were set will be freshly addressed at a meeting in Japan next month as part of a path to new commitments by the United Nations on the issue. “Many developed countries face a threat to their economies and loss of culture if more is not done to protect the environment better,” the SecretaryGeneral ...

Carnegie Stages

Historically the exact age of human embryo specimens has long perplexed embryologists. With the menstrual history of the mother often unknown or not exact, and the premenstrual and postmenstrual phases varying considerably among women, age sometimes came down to a best guess based on the weight and size of the embryo. Wilhelm His [5] was one of the first to write comparative descriptions of hum...

Carnegie Institution

Carnegie Mellon

Due to small, “sub-excitonic” dimensions, semiconductor nanocrystals can produce novel electronic interactions that involve charges residing in intrinsic quantized states as well as species located at nanocrystal surfaces. Strong interactions between quantum-confined carriers open, for example, a new nanocrystal-speci fic energy relaxation channel associated with Augertype electron-hole energy ...

A Solution to the Focusing 3d Nls That Blows up on a Contracting Sphere

We rigorously construct radial H solutions to the 3d cubic focusing NLS equation i∂tψ + ∆ψ + 2|ψ|ψ = 0 that blow-up along a contracting sphere. With blow-up time set to t = 0, the solutions concentrate on a sphere at radius ∼ t but focus towards this sphere at the faster rate ∼ t. Such dynamics were originally proposed heuristically by Degtyarev-Zakharov-Rudakov [2] in 1975 and independently la...