introduction: prefabricated metal and ceramic posts can be used with different kinds of core materials as an alternative to the conventional casting post and cores. it is unclear how these post and core systems can withstand different kind of forces in the mouth. the purpose of this study was to compare the fracture strength of endodontically treated, crowned maxillary incisors restored with ca...

This paper analyzes field experimental data obtained on about 30 concrete structures, both new (age up to 1 year) and old 60 years). The include in situ non-destructive tests (NDT) of air-permeability kT, electrical resistivity ρ surface moisture m, as well conducted drilled cores: O2-permeability kO, water sorptivity a24, MIP, carbonation rate Kc chloride content Cl at 10 20 mm depth. main con...

Abstract Knowledge of ground stresses is crucial for control activities such as the design underground openings, selection support systems, and analysis stability. However, it a known fact that far field experience changes in orientation magnitude due to presence geological structures excavations created by mining activities. As result, in-situ around drifts, ramps, stopes mines are quite diffe...

The spatial glaciochemical variability of snow samples collected along a transect from Zhongshan Station to Lambert Glacier Basin 69 (LGB69) in Antarctica was investigated. Sea-salt ion concentrations exponentially decreased with increasing distance the coast and/or altitude. observed high sea-salt within 20.6 km may be related preferential wet or dry deposition aerosols. Methanesulfonic acid (...