ABSTRACTS OF TECHNICAL ARTICLES 769 



on the spoken input digit, a best match type comparison is made with each of 

 the ten standard digit patterns and the digit of best match selected. 



DicKTEN, E., see R. L. Wallace, Jr. 



Felker, J. H.^ 

 T3rpical Block Diagrams for a Transistor Digital Computer, Elec. 

 Eng., 71, pp. 1103-1108, Dec, 1952 and A.I.E.E. Trans., 71, pp. 

 175-182, 1952 (Monograph 2046). 



The superior speed capabilities of vacuum tubes have led to their use in 

 computer designs to replace relays. Because of their small size, low power 

 consumption, and long hfe expectancy, it now appears that transistors will 

 replace tubes as computer elements. Here is a study of binary computer 

 functions in which transistors are employed. 



FrAYNE, J. G.,^ AND J. P. LlVADARY^ 



Dual Photomagnetic Intermediate Studio Recording, S.M.P.T.E., 

 Jl., 59, pp. 388-397, Nov., 1952. 



Selected production magnetic tracks are transferred to a recorder which lays 

 down colHnear 200-mil push-pull direct-positive variable-area and magnetic 

 tracks. Magnetic stripe is on base of photosensitive emulsion on the opposite 

 edge of film from photo track. The photo track may be used for reviewing, 

 cutting, etc. Re-recording is done from assembled magnetic tracks. This 

 method combines advantages of photo track for editing and provides superior 

 quality of magnetic track. 



Hagstrum, H. D.^ 

 Electron Ejection from Mo by He"^, He''"^, and He2"*", Phys. Rev., 

 89, pp. 244-255, Jan. 1, 1953. 



Total yield and kinetic energy distribution have been measured for electrons 

 ejected from atomically clean and gas covered molybdenum by the ions 

 He+, He++, and He2+, in the kinetic energy range 10 to 1000 ev. Evidence is 

 presented that one electron is excited into the kinetic energy continuum for 

 each incident. He+ ion and that the electrons so excited are partially internally 

 reflected at the potential barrier of the metal. The slowest ions observed were 

 found to eject 0.25, 0.72, and 0.13 electron per ion for He+, He++, and He2"*', 

 respectively. Total electron yield is found to be nearly independent of ion 

 kinetic energy up to 1000 ev. This observation and that of the kinetic energy 

 maximum for slow ions indicate that the electrons are released in an Auger 

 type process for which the energy is supplied by the potential and not the 

 kinetic energy of the ion (potential ejection). Electrons of kinetic energy 

 greater than the upper limit predicted by present theory are observed for 

 faster ions and are accounted for by the shift of the energy levels of the bom- 

 barding particle when it is near the metal surface. Some conclusions con- 



^ Bell Telephone Laboratories, Inc. 



^ Westrex Corporation. 



'' Columbia Pictures Corporation. 



