Symmetry-based pulsed DNP and EPR sequences - Science | AAAS

Conceptual illustration linking SU(3)-inspired vacuum geometry with coherent and dissipative brain activity. Credit: Ahmed Farag Ali, Nader Inan, Ruben Laukkonen and Pavlo Mikheenko. AI-generated illustration created with OpenAI's ChatGPT. You bring your attention back to the breath. Sometimes, after many such returns, the effort eases. Thoughts lose their urgency, while awareness remains clear. Less occupies the mind, yet the moment still feels whole. We are interested in what makes that wholeness possible. Even an ordinary moment brings together vision, memory, bodily sensation and attention. Their contents change constantly, but they belong to one experience.

The spacecraft delivered materials and equipment for new research studies to the station.

Mud from a fjord shows an Atlantic air pattern brought wetter, colder spells to southern Greenland, a clue to how its ice may fare. Greenland’s ice is shrinking as the planet warms. But in the island’s southwest, rainfall and snowfall have been influenced by the same North Atlantic air-pressure pattern for at least 5,000 years. When that pattern tipped one way, the region turned wetter and colder. The record comes from mud on the floor of a Greenland fjord, and it suggests snowfall, not only temperature, shaped how the area’s ice grew and shrank. It doesn’t yet show how glaciers there will respond to the warming ahead. Johan Faust, a researcher at MARUM, the Center for Marine Environmental Sciences at the University of Bremen in Germany, led the work with colleagues in Germany, Norway, Denmark and Canada. A seesaw in the airThe pattern is called the North Atlantic Oscillation. It’s the difference in air pressure between a low that sits near Iceland and a high near the Azores, and it’s strongest in winter. When that difference is large, the pattern is in its positive phase. Northwestern Europe and southwestern Greenland both get more rain and snow.

Lawrence Livermore National Laboratory researcher Isaiah Santistevan led the development of three-dimensional simulations exploring how a nuclear device could deflect or disrupt an asteroid threatening Earth. Credit: Blaise Douros/LLNL Lawrence Livermore National Laboratory (LLNL) researchers are developing three-dimensional simulations to examine how a nuclear device could be used to deflect or potentially disrupt an asteroid threatening Earth.