The paper presents results of the study on electrochemical potentials of metallic dental materials. Seven alloys, amalgam and chromium-nickel steel were examined as well as the effect of the solution conductivity ranging from 12.5 μS/cm to 2.01 mS/cm and solution pH within the range of 5.5 to 11.2 on electrochemical potentials of the materials. Amalgam presented with the lowest changes of the s...

We report the first extragalactic detection of the pure rotational H2 S(0) and S(1) lines at 28.2 and 17.0 m in the central 130 pc molecular complex of the nearby Scd galaxy NGC 6946. We deduce a temperature of this gas component of 170 K and a mass of 5 106 M for an ortho/para ratio of 3, corresponding to the ratio of statistical weights. The warm gas is confined to a 500 (135 pc) diameter reg...

From the point of view of a data warehouse system its part of collecting and receiving information from other systems is crucial for all subsequent business intelligence applications. The incoming information can be classified generally in two types, the state-snapshot data and the state-change or event data usually called transactional data, which contains information about the change processe...

We present 21-cm H i line and 408 MHz and 1.4 GHz continuum observations of the Magellanic dwarf galaxy UGCA 86, made with the DRAO synthesis telescope. UGCA 86 is detected in the continuum at both frequencies, with 408 MHz flux density S 408 = 120 ± 30 mJy and 1.4 GHz flux density S 1400 = 79 ± 3 mJy. The H i structure of UGCA 86 is complex, with two separate components: a rotating disk and a ...

The gender wage gap among adult full-time workers, after controlling for educational attainment and other observable characteristics, is about half the size it was in 1980. Using Census and Current Population Survey data from 1959 through 1999, we assess the relative contributions of two factors to the decline in the gender wage gap: changes across cohorts in the relative slopes of men’s and wo...

CuO and V₂O₅ graphene quantum tunneling composites (GQTC) presented in this article were produced and their sensory properties were analyzed. The composites were synthesised using two stage high-power milling process, which resulted in materials that have good temeprature and pressure sensory properties. Described production process defines internal structure of materials such that when used as...

Co-extrasion involves extrasion of multiple layers at the same time. Functionally graded materials comprising various layers with different properties can be produced through co-extrusion. Rheological control is vital for successful co-extrusion of layered cement-based materials. The paste flow in the barrel and the die land in a ram extruder should be plug-like, while the paste should be shear...