Selection of Processing Methods and Parameters for Composite Inserts in Window Profiles with Regard to the Strength of Their Welds.

In the study of structural materials, the analysis of fracture and deformation resistance plays an important role, particularly in materials widely used in the construction industry, such as poly(vinyl chloride) (PVC). PVC is a popular material used, among others, in the manufacture of window profiles, doors, pipes, and many other structural components. The aim of this research was to define the influence of the degree of milling of the glass-fibre-reinforced composite on the strength of the window frame welds, and in the next step, to propose new welding parameters to obtain sufficient strength properties that allow reducing the cost of the technological welding operation.

Tribological Properties of Selected Ionic Liquids in Lubricated Friction Nodes.

This article compares the rheological and tribological properties of three ionic liquids: Tributyl(methyl)phosphonium dimethyl phosphate 97%-MFCD, 1-Butyl-3-methylimidazolium hexafluorophosphate 97%-BMIMPF6, and 1-Butyl-3-methylimidazolium tetrafluoroborate 98%-BMIMBF4. Their density and kinematic viscosity at 20 °C and 40 °C were investigated, and tribological tests were carried out at the same temperatures with ball-on-disc contact. The test materials were made of 100Cr6 steel.

The tree-ring width and interval trend values as indicators of sensitivity to temperature and precipitation in different provenances of European larch.

The study assessed the sensitivity of 20 provenances of European larch (Larix decidua Mill.) growing at provenance experimental trials located in lowland (Siemianice) and upland (Bliżyn) climate in Central Poland to air temperature and precipitation, including drought. The measure of the tree' sensitivity was their radial growth reactions, i.

Postpartum hemorrhage assessment and targeted treatment.

Postpartum hemorrhage (PPH) is the leading cause of maternal mortality worldwide, and mitigating it is a global health priority. In this review, we discuss the measurement, assessment, and treatment of PPH. We review different methods of quantifying blood loss, including gravimetry, calibrated drapes and canisters, and colorimetric techniques.