Process to its mathenatical aspect only, tvro of the rather faniliar illustrations would be the technology for the aton bonb and the cruise missile. The major mathematical problen of lhe atomic bonlf, concerned the internal ballistics, that is,roughly speaking, the appropriate tining and dirnensioning of the constituents ofthe fission process. The appropriate fEthenatical nDdel had been found already inthe late 1920s in convolution equations over the half-axis of the Weiner-Hopf typefor nodelling the equibalance of radiation on the surface of stars. Thus, thetruly indigenous nodel originated fron quantun nechahics investigations withinastrophysics. Tbe najor nathematical problem of cruise-rnissile technology is thedigitallzation of terrain surfaces for the terrain contour matching deployed. Here \ tbe challenging problen for geodesy was already formulaled 20 years ago by civil . engineers for conputing the anount of earth novenent needed for alternative routes'in road building. The nFthods of pattern lecognitioh involved are, among othersources, inspired by the practical needs of nass nedical care, for exanple, inprecaution against uterine cancer. 48/ 91. In.!he field of electronics, too, nilitary technology provides nore of anillustration of its application rather than Ehe pure side of theoreticalabstractions' although the anbivaLence between these tflo aspects cannot be finally. resolved. Nevertheless, engineers and scientists concerned with it knovr that moder n developnents in electronics have undergone a two-sided change within thelast decades. The first change r,ras in the rnaterial basis, from lhe extensive useof iron and gtass in radio tubes in the first half of this century to the rnoreintenslve use of seleniurn and gernaniun in transislors, h,hich have been underconstant developnent since 1948. Besides a change in the material basis and aslight lncrease in the intensity of material exptoitation, this gave a noteworthyincrease in energy utilizat.ion. The second change was the developnentl since 1960, A/37/386 Engl ish Annex Page 45
**Analysis**
The text appears to be discussing the applications of mathematical concepts and technologies in various fields, including engineering, physics, and medicine. The examples given, such as the development of atomic bombs and cruise missiles, suggest a focus on the technological and scientific aspects of the text. The language used is technical and specialized, indicating that the text is intended for an audience with a strong background in mathematics and science.

**Category**
Science and technology, Industry