Now showing items 1-10 of 67
Measurement of sonic velocity in liquid Refrigerant 12
(The American Institute of Physics, 1977-08)
The sonic velocity in subcooled liquid Refrigerant 12 (CCl2F2) was measured at 26.7 °C using an apparatus designed to investigate transients associated with pipe blowdown. The mean value for sonic velocity obtained from ...
Model networks of end‐linked polydimethylsiloxane chains. I. Comparisons between experimental and theoretical values of the elastic modulus and the equilibrium degree of swelling
(The American Institute of Physics, 1977-02-01)
Two samples of hydroxyl‐terminated polydimethylsiloxane having molecular weights the order of 2×104 and 1×103 g mol−1 were separated into a total of six fractions of relatively narrow molecular weight distribution. Portions ...
Molecular Exciton Cluster States and Spectra with Application to Benzene
(WILEY-VCH Verlag, 1977-06-01)
A cluster expansion is introduced for the determination of the optical absorption properties of cluster states in substitutionally disordered molecular crystals. This method is based on the Green's function expansion in ...
On the bare pomeron graph in two-dimensional QCD
(Elsevier, 1977-10-03)
We present a detailed study of the bare pomeron graph in two-dimensional QCD in the 1/Nc approximation. The absence of a new singularity unrelated to quark parameters is derived. The "cylinder" graph is shown to induce ...
Magnetism and archaeology: Magnetic oxides in the first American civilization
(Elsevier, 1977)
Archaeological excavations at sites of the Olmec civilization (1500 to 500 B.C. in present-day Mexico) have unearthed artifacts formed from massive iron oxide ores. Iron oxide ores were ground and shaped into highly polished ...
Optical alignment procedure for an unstable resonator high‐power laser
(The American Institute of Physics, 1977-12)
A method for aligning the optics of a pulsed high‐power positive branch unstable resonator is described. The procedure relies on the distribution of the output beam and is thus independent of a separate alignment laser, ...
Turbulent buoyant plumes
(The American Institute of Physics, 1977-08)
The velocity and temperature distributions in turbulent buoyant induced by a line source or point source of heat are calculated by assuming the eddy viscosity and eddy diffusivity to be constant in any cross section of the ...
Transient heat transfer in a thick thermal boundary layer with spherical symmetry
(Elsevier, 1977)
Unsteady heat diffusion in a thick thermal boundary layer over a spherical surface in radial motion is studied. The boundary layer is divided into two parts, one towards the outer edge of the layer, and the other adjacent ...
Collective electron states in ZnxFe3-xO4 and CdxFe3-xO4 for 0 [les] x [les] 0.3
(Elsevier, 1977)
57Fe Mossbauer measurements of ZnxFe3-xO4 and CdxFe3-xO4 have been made at 300 K in zero applied field and at 180 K in zero and 55 kG applied fields. The compositional dependence of the isomer shifts, B to A area ratios ...
Long range exciton percolation and superexchange: Energy denominator study on 3B1u naphthalene
(Elsevier, 1977-02-01)
The long-range exciton percolation model is found to describe the lowest triplet exciton superexchange ("tunneling") migration at low temperature (2 K), in our model alloy system: Binary isotopic mixed naphthalene crystals ...