The method of induced activity of the investigated cross-sections of excitation of isomeric states in the 110Pd(y,n)109m,gPd and 110Pd(n,2n)109m,gPd reactions in the energy range 12–35 MeV is studied. The experimental results are compared with those of calculations carried out using the software package TALYS-1.6.

A Thermo Systems Incorporated 1080 vector anemometer was used to map the general flow pattern of a complicated laboratory model of a tornado. Threedimensional velocity vectors were measured with the aid of a low-pass filter for smoothing the fluctuating signal due to the inherent flow instability. The resulting pattern was in good agreement with visual observations (motion picture) of this laboratory model, The split film anemometer with its direction-finding capacity proved to be a useful instrument for this purpose, although the detailed flow structure was extremely difficult to obtain, owing to the application of a signal averaging technique. Sources of occasional error in determining the flow direction in association with this instrument are discussed.

Representations of U( N ) are realised as right translations on holomorphic Hilbert (Bargmann) spaces of n x N complex variables. r-fold tensor product spaces of irreducible representations of U ( N ) are shown to be isomorphic to subspaces of the holomorphic Hilbert spaces. Maps are exhibited which carry an irreducible representation of U ( N ) into these subspaces. The algebra of operators commuting with these maps is constructed and it is shown how eigenvalues of certain of these operators can be used to resolve the multiplicity. Several examples from U(3) are explicitly worked out.

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