Abstract: A photoelectron linear accelerator for producing a low emittance polarized electric beam. The accelerator includes a tube having an inner wall, the inner tube wall being coated by a getter material. A portable, or demountable, cathode plug is mounted within said tube, the surface of said cathode having a semiconductor material formed thereon.

Abstract: An interactive computer assisted pronunciation learning system which allows a student to compare his/her pronunciation with that of a model speaker. A model speaker's recorded reading of text is digitally linked to and aligned with each corresponding syllable of the text. Pitch, volume and duration parameters of each syllable are extracted digitally and displayed in a simplified notation above each word. The student's own speech is also recorded, analyzed, displayed, and/or replayed in the same manner. The student can choose the option of overlapping his/her own notation above those of the model speaker and determine whether, to what extent, and on which parameters his own speech varies from that of the model speaker. Scores may be provided in the margin denoting the percentage of correct correspondence to the model as well as the type and degree of each error.

Abstract: A tool which has the capability of removing the nut from both large and small nut plate assemblies. The tool comprises a handle having a removal nose portion at one end, the nose portion having an upper jaw portion separated from a lower jaw portion by an opening. The upper jaw portion is used to pry open the nut plate cage and the lower jaw portion pushes and lifts the nut from the cage. The space between the two jaw portions enables a pivoting action around the pried open cage wall.