The new polarizer devices at RESEDA

The new polarizer devices at RESEDA

SAPHIR + RESEDA: A New Approach to Intelligent Data Base Access

This paper describes a transportable natural language interface to databases, augmented with a knowledge base and inference techniques. The inference mechanism, based on a classical expert system's type of approach, allows, when needed, to automatically convert an Input query into another one which 1s "semantically close". According to RESEDA' S theory, "semantically close" means that the answe...

Field Emissivity Measurements during the ReSeDA Experiment

Emissivity measurements were made during the ReSeDA experiment. Emissivities are necessary for obtaining surface temperatures from remote sensing data in the thermal infrared, and they enter the radiative balance in the atmosphere-surface system. The objective of this study was to assess the spatial variation of surface emissivity in the area, with special regard to the spectral variation of em...

Continuous-flow DNP polarizer for MRI applications at 1.5 T

Here we describe a new hyperpolarization approach for magnetic resonance imaging applications at 1.5 T. Proton signal enhancements of more than 20 were achieved with a newly designed multimode microwave resonator situated inside the bore of the imager and used for Overhauser dynamic nuclear polarization of the water proton signal. Different from other approaches in our setup the hyperpolarizati...

A New Type of Beam Splitting Polarizer Cube

Beam splitting polarizer cubes consisting of two right angle prisms cemented together after one hypotenuse is coated have become important optical components in many optical systems. Usually the coating stack is of the MacNeille design. We present and compare an alternative coating structure consisting of a very fine wire grid structure on the cube hypotenuse that has performance advantages of ...