79 research outputs found

    Geology of the Engigstciak Archaeological Site, Yukon Territory

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    Reports geological investigations is 1956-1957 to aid in dating the archeological finds. Quaternary sediments in a clay and a sand sequence are described; their stratigraphic relationships have been disrupted by soil movements resulting from freezing and thawing and from downslope creep. These soil movements, their mechanisms and rates postulated, apparently buried an organic layer containing artifacts progressively between two layers of marine clay. Due to overturning and mixing of layers of different ages, further complicated by a possible upthrust of the marine clay by glacier ice, the artifacts cannot be dated by geological means. From evidence indicating only one marine invasion coincident with glacial advance however, the archeological material is concluded to postdate the last Pleistocene glaciation

    Thermodynamic perturbation theory for dipolar superparamagnets

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    Thermodynamic perturbation theory is employed to derive analytical expressions for the equilibrium linear susceptibility and specific heat of lattices of anisotropic classical spins weakly coupled by the dipole-dipole interaction. The calculation is carried out to the second order in the coupling constant over the temperature, while the single-spin anisotropy is treated exactly. The temperature range of applicability of the results is, for weak anisotropy (A/kT << 1), similar to that of ordinary high-temperature expansions, but for moderately and strongly anisotropic spins (A/kT > 1) it can extend down to the temperatures where the superparamagnetic blocking takes place (A/kT \sim 25), provided only the interaction strength is weak enough. Besides, taking exactly the anisotropy into account, the results describe as particular cases the effects of the interactions on isotropic (A = 0) as well as strongly anisotropic (A \to \infty) systems (discrete orientation model and plane rotators).Comment: 15 pages, 3 figure

    Observations on Pressures Exerted by Creeping Snow, Mount Seymour, British Columbia, Canada

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    International Conference on Low Temperature Science. I. Conference on Physics of Snow and Ice, II. Conference on Cryobiology. (August, 14-19, 1966, Sapporo, Japan

    Relocation Of Buried Markers

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    CF2 Difluoromethylene

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    Modified time-domain LS FIR filter design for musical notes

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