[en] Short communication

[en] Problems which arise when defining the dimension of objects are considered. The concepts of dimension thus suggested as related to a definition of a dimension depending on scale, are discussed. A crude estimation of the dimension of a proton as a function of scale rho is made. (U.K.)

No abstract available

[en] The range R distribution g(α, R) of particles having lost an amount α of energy is connected with the energy epsilon distribution h(R, epsilon) of particles passing through a thickness R of thin absorber. In order to obtain the moments of g(α, R), we must solve a Fredholm integral equation of the second kind

[en] A lattice model for the aether is shown to give indications of a fundamental charged particle of mass M such that M/msub(e)=3/4(108)³πsup(2)(1843)^-4/3[(3/2)sup(1/2-1] ^-1=1836.15232, a value very close to the observed proton electron mass ratio of 1836.15152(70)

[en] Radiations other than those of the electromagnetic spectrum or of sound may be used for diagnosis. These consist of beams of sub-atomic particles, particularly of protons and heavy ions. With these beams radiographs of unusually high contrast are obtained for the visualization and differentiation of the bodily tissues at very low doses. The method is practical for use in hospitals and has potential for screening purposes

No abstract available

[en] Observations of energetic particle fluxes in the geomagnetic tail show that these particles exhibit a bursty appearance on all time scales. Often, however, the bursty appearance is merely due to multiple entries and exits of the spacecraft into and out of the plasma sheet which always contains varying fluxes of energetic particles. Observations of the suprathermal and high-energy component of the plasma sheet are discussed, and observations are presented of energetic particle bursts in the plasma sheet proper, which may be due to a locally ongoing acceleration process. Also discussed are energetic particle phenomena occurring near the edge of the plasma sheet, either during thinning or during recovery. Some recent results from the ISEE 3 deep tail mission bearing on energetic particle acceleration are presented, and the present status of the theory of particle acceleration within the magnetotail is briefly reviewed. 40 references

[en] In proton linacs the particle beams are often focused by isochronic periodic fields, in which the lengths of periods are different but the times that the particles travelling through each period are constant. The basic theory of focusing by isochronic periodic fields is discussed. The theory can be generalized to the periodic fields with slow varying periods

[en] Understanding of the deuteron has improved greatly in recent years, due both to improved measurements of the observables and to new theoretical approaches. These are reviewed with emphasis on the static of low energy deuteron properties. The questions of the deuteron matter radius is discussed in detail