Bell System

Nyquist, H. (1932) Regeneration Theory, Bell System Technical Journal, 11, pp. 126-147. 

To a certain extent, the formation of the tetrabasic variant is desired, because 4PbO PbS04 forms fairly large crystals when transformed into lead dioxide (PbO,). This results in a mechanically stable active material, but there are disadvantages, because it is more difficult to transform this material into lead dioxide, i.e., the formation process (see below) is more expensive (and takes longer) and the initial capacity is slightly reduced (cf., e.g., Ref. [19]. For "long-life batteries" (Bell systems cell), a special process has been developed to produce pure tetrabasic material [20]. 

Switching and Logic Elements," Bell System Techn, J, 1975 (1982), 6 ... 

A. Uhlir, Jr., The Bell System Technical Journal, March (1956) 333. 

Since the Initial work of White (IQ), the Bell System and other major semiconductor users have extensively used silicones In the protection of numerous thin-film and thlck-fllm devices (24.25). The materials primarily have been condensation-cure silicones In xylene dispersion. The performance of encapsulated semiconductors used within the Bell System Is well documented (26). and studies continually In process support the use of silicones for the prevention of electronic component deterioration under conditions similar to the In-vlvo environment. 

More recently Wong (2U, has reported the results of tests designed to characterize parameters of electronic silicones by Ther-mogravlmetrlc, Fourier Transform-Infrared, and Gas Chromatography/ Mass Spectrometry. This work has concentrated upon condensation-cure materials used within the Bell System, rather than the end-blocked free radical (addition-cure) silicones. 

W. V. Van Roosbroeck, Theory of flow of electrons and holes in germanium and other semiconductors, Bell Systems Tech. J., 29 (1950), pp. 560-607. 

Nyquist, H. Bell System Tech. J. II (1932) 126. Regeneration theory. 

Flanagan and Golden, 1966] Flanagan, J. and Golden, R. (1966). Phase vocoder. Bell System Technical Journal, 45(9) 1493-1509. 

Bennett, 1948] Bennett, W. R. (1948). Spectra of quantized signals. Bell System Technical Journal, pages 446-471. 

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