Effect of ice content and cryogenic structure of frozen ground on the bearing capacity of a pile

Conclusions 1. The limit resistance of piles in permofrost, especially of driven and bored-driven piles, is determined not only by the amount of ice I_C but also by the character of ice distribution in the mass, i.e., by the cryogenic structure.2. Horizontally bedded structures as compared with vertically bedded and cellular, with like content of ice, provide higher bearing capacity of the piles (on an average, by 17%).3. The effect of structure in determining the bearing capacity of a pile may be considered by introducing the structure coefficient K_T into the formula for calculation; the values of this coefficient for horizontally bedded structure have been given in Table 1. For vertically bedded and cellular structures, K_T = 1 is recommended, and for massive soils, K_T = 0.Siberian Branch of the Scientific-Research Institute of Foundations and Underground Structures (SD NII Osnovanii) Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 6, pp. 20–21, November–December, 1976.     

Contact thermal resistance of some graphites

Experimental data on the contact thermal resistance of VPP, ARV, and MPG-6 graphites in relation to the compression and finish of the contact surfaces are given.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 33, No. 3, pp. 455–459, September, 1977.     

Synchronous measurements of the atmospheric radio emission in the two and three millimeter wavelength regions

Apparatus and procedure of measuring the atmospheric radio emission simultaneously in two atmospheric windows are described. The results of measurements of the sky brightness temperature and obtained atmospheric optical depth values are reported. The diurnal and seasonal variations of the sky temperature and zenith absorption as well as their relation to weather parameters of nearsurface atmospheric layer are discussed.     

Investigation of atmospheric emission and attenuation at wavelengths 2.07 and 3.34 mm

The results of processing the data of an annual cycle of synchronous measurements of the Earth's atmosphere emission in two transparency windows are reported.     

Redox equilibrium U(VI) + 2Ce(III) ? U(IV) + 2Ce(IV) in the presence of unsaturated heteropoly anions P2W17O 6110? and SiW11O 398?

The equilibrium of the reaction U(VI) + 2Ce(III) ⇄ U(IV) + 2Ce(IV) in the presence of unsalurated heleropoly compounds K₁₀P₂W₁₇O₆₁ and K₈SiW₁₁O₃₉ in 0.01–1.0 M HClO₄ solutions (ionic strength 1) was studied. The potential of the Ce(IV)/Ce(III) couple in K₈SiW₁₁O₃₉ solutions was measured, from which the overall stability constants β₂^IV of the complexes U^IV(SiW₁₁O₃₉)₂¹²⁻, equal to 10^23.8 and 10^19.8 in 0.1 M HClO₄ + 0.9 M NaClO₄ and in 1.0 M HClO₄, respectively, were calculated. Under the same conditions, for the complex U^IV(P₂W₁₇O₆₁)₂¹⁶⁻ β₂^IV = 10^23.2 and 10^18.5 (the latter value was obtained by extrapolation or data for 0.1 M HClO₄ + 0.9 M NaClO₄ solution). Original Russian Text ? V.P. Shilov. A.B. Yusov, M.N. Sokohva. A.M. Fedoseev, 2008, published in Radiokhimiya, 2008, Vol. 50. No. 3, pp. 203–208.