The stability properties of inviscid protostellar disks are examined taking into account the Hall effect and buoyancy. Depending on the parameters, different types of instabilities can exist in different regions of disks. In a very low ionized region, the instability associated with baroclinic effects of buoyancy is likely most efficient. The Hall-driven shear instability can lead to destabiliz...

The role played by storage systems is becoming increasingly important as computing systems accelerate their transformation from “number-crunching” devices to “information appliances.” If there is a single number that can best summarize the technology motivation for my research, it is the tremendous growth of disk areal density. At a phenomenal annual rate of 60%, this growth is fueling almost a...

In Permalloy submicron triangles, configurational anisotropy a higher-order form of shape anisotropy yields three equivalent easy axes, imposed by the structures’ symmetry order. Supported by micromagnetic simulations, an experimental method was devised to evaluate the nanostructure dimensions for which a Stoner-Wohlfarth type of reversal could be used to describe this particular magnetic aniso...

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Recent years have seen vast progress in the generation and detection of structured light, with potential applications in high capacity optical data storage and continuous variable quantum technologies. Here we measure the transmission of structured light through cold rubidium atoms and observe regions of electromagnetically induced transparency (EIT), using the phase profile as control paramete...

Magnetic bearings are increasingly being used for a large variety of applications. Their unique features make them attractive for solving classical rotor-bearing problems in a new way and allow novel design approaches for rotating machinery. Classical limitations can be overcome and feature ranges can be extended. Of course, limitations still hold, imposed by principally valid physical constrai...

Red-tape barriers (RTBs) are an important source of trade costs, but have received little attention in the trade literature. In this paper we take a first step toward a theory of RTBs, and show that their implications can be very different from those of more traditional trade barriers. The model highlights that RTBs have important impacts on the extensive margin of trade, and yields rich compar...