Since its inception in 2017, the Polar Institute has become a premier forum for discussion and policy analysis of Arctic and Antarctic issues, and is known in Washington, DC and elsewhere as the ...

Polar vortices are omnipresent in planetary atmospheres, however, not much is known about their existence and characteristics in the Sun due to the present lack of direct observations at the poles.

Seven of the eight Arctic nations are members of NATO yet collectively, they trail Russia's ice-breaker capacity. This was even before adding in the icebreakers China has built as it proclaims itself ...

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Division of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden Regional Centre of ...

In 1992, Allen proposed an light field with a helical wavefront exp (iℓφ) carrying an orbital angular momentum (OAM) of ℓħ per photon, which was later referred to as the vortex beam [1]. Vortex beams ...