Activated carbon increases cryocooler efficiency

Cryocoolers are ultracold refrigeration units used in surgery and drug development, semiconductor fabrication, and spacecraft. They can be tubes, pumps, tabletop sizes, or larger refrigerator systems.

Steps toward room-temperature superconductivity

The possibility of achieving room temperature superconductivity took a tiny step forward with a recent discovery by a team of Penn State physicists and materials scientists.

Keeping adolescent girls safe from violence

Violence against women and children is a global epidemic that carries lifelong consequences for individuals, families, and communities. Adolescent girls are particularly at risk because they may not have access to supportive ...

Scientists develop new primary method for measurement of pressure

Scientists from the Physikalisch-Technische Bundesanstalt (PTB) have implemented a novel pressure measurement method, partly as a byproduct of the work on the "new" kelvin. In addition to being new, this procedure is a primary ...

The periodic motion of flexible knots, and the connection to DNA

Can the topology of microobjects influence the way they move in a fluid? Experiments and simulations of Polish and Swiss researchers published in the Physical Review Letters show that the dynamics of elastic chains settling ...

Warm water creeps into otherwise-calm Central Pacific

After a mild La NiƱa late last year, temperatures, convection and rainfall rates in the equatorial Pacific Ocean returned to normal by early April of this year. An April 9 image of sea level height from the U.S./European ...

Y-type stars

Brown dwarf stars are failed stars. Their masses are so small, less than about eighty Jupiter-masses, that they lack the ability to heat up their interiors to the roughly ten million kelvin temperatures required for normal ...

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