Now showing items 61-70 of 733
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 ...
Structure of the Wigner 9j Coefficients in the Bargmann Approach
(The American Institute of Physics, 1972-01)
Bargmann's treatment of the Clebsch‐Gordan (3j) and Racah (6j) coefficients is here extended to the case of Wigner 9j coefficients. The generating function for the 9j coefficient is computed by the analytic method. The ...
A mechanical time-of-flight neutron diffractometer
(Elsevier, 1974-02-01)
A mechanical time-of-flight (TOF) neutron diffractometer has been constructed and a system of data analysis developed for the study of noncrystalline substances through radial density functions. Measurements to wave vector ...
The ground state fundamentals of p-benzoquinone and p-benzoquinone-d4
(Elsevier, 1974-03-30)
The solid state infrared and Raman spectra of p-benzoquinone and several isotopic derivatives are reported and compared with the results of previous solution and vapor phase studies and with the results of previously ...
Structure of the Generalized Veneziano Amplitudes. II. Possible Group Theoretic Content
(The American Institute of Physics, 1971-10)
An attempt is made to generalize a result of Vilenkin that the beta function (being adopted as Veneziano formula for four‐particle processes) appears as the kernel (in the integral) of the irreducible representation (in ...
Solar energy economics--the a priori decision
(Elsevier, 1976-10)
The initial decision concerning the economic viability of a solar energy heating system is shown to involve technical, physical, meteorological, geographic, design and cost factors as well as the source of funding and type ...
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, ...
Second class currents and mirror beta decays
(Elsevier, 1971-08-09)
Answers are given to some questions raised by Lipkin concerning the relation between mirror asymmetry in beta-decay and second-class currents. Mirror asymmetry (not of electromagnetic origin) is evidence for second-class ...
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 ...
Nature of the surface compounds and reactions observed on graphite electrodes
(Elsevier, 1975-09)
The nature and composition of the surface of pyrolytic graphite and the consequent possible effects, when the material is used as an electrode, are considered on the basis of the structure of the graphite and of the handling ...