A fine scale drift wave mode possessing unusually high frequency 2-3 MHz and radial wave number is observed using the correlative upper hybrid resonance backscattering technique at the FT-2 tokamak under conditions when the ETG mode should be unstable. The radial wave number spectrum of turbulence is measured and shown to be maximal at values 120-170 cm −1 corresponding to the largest ETG instability growth rate.

No abstract

The paper studies the properties and the possibilities of using definite size thin-walled fasciae from the lightweight concrete, reinforced with one-layer fiberglass fittings, by numerical methods. The object of the research is a standard element of the prefabricated monolithic reticular cover’s clothing under the plane stress. Plane prefabricated cells have a hexagonal shape and ribbing that make a basis for a common reticular framework after the assembly of the cover. Strength properties of the model are studied at different reinforcement degrees. The paper also researches the possibilities of increasing the fittings’ adhesion ability due to the regular curved structure. The comparison of different reinforcement variants is presented. The distributive function of the contour ribbing on the stressed state of the standard element is evaluated. The paper also gives recommendations on the use of discrete thin-walled reinforced elements as the elements of the bearings’ covers in the structure of multilayer or multilayer membranate constructions.

No abstract