Switching fields

Switching fields

Most scientists would probably agree that switching fields from time to time is a good thing — for both scientist and science. MacFarlane Burnett and Neils Jerne, for example, each brought concepts and technology from microbiology to immunology, and, as a consequence, the clonal selection hypothesis, which revolutionized immunology, was born. Why then is field-switching not more common? One rea...

Fast switching of magnetic fields in a magneto-optic trap

Recurrent switching rules for pairs of linear planar vector fields

Given a switched system formed by a pair of (not asymptotically stable) linear vector fields of R, we define a special class of hybrid feedback laws (called recurrent switching rules) whose structure depends on some conic regions with nonempty interior. We prove that if the system is asymptotically controllable and radially controllable, then it is robustly stabilized by any recurrent switching...

Switching plastic crystals of colloidal rods with electric fields

When a crystal melts into a liquid both long-ranged positional and orientational order are lost, and long-time translational and rotational self-diffusion appear. Sometimes, these properties do not change at once, but in stages, allowing states of matter such as liquid crystals or plastic crystals with unique combinations of properties. Plastic crystals/glasses are characterized by long-ranged ...

Revised Definition of the GMPLS Switching Capability and Type Fields

GMPLS provides control for multiple switching technologies and for hierarchical switching within a technology. GMPLS routing and signaling use common values to indicate the type of switching technology. These values are carried in routing protocols via the Switching Capability field, and in signaling protocols via the Switching Type field. While the values used in these fields are the primary i...