This paper is a form of a report on conservation repairs on the internal walls of the semibasement of the Castle in Kórnik. One key element of these works is the desalination of the cellar walls. The excessive amount of salt results from a number of measures undertaken towards the end of the 19th c. and in the early 20th c., in order to rescue the architectural gem against a disaster. Carried out in the early 1950s, the cebertization (petrification of soil) proved to be the most spectacular measure leading to the stabilization of the structure. Unfortunately, however, this operation generates a side effect in the form of a huge amount of harmful salts, which permeate from the soil into the castle walls, leading to their gradual destruction.
In view of the progressing degradation of the walls in the castle cellars, measures leading to the elimination of the increased level of dampness and the damaging salts in the walls were implemented as of 2012. After works stabilising the level of dampness were carried out, the process of desalination, i.e. removal of salt from the structure of the walls, was undertaken as the subsequent stage – and is currently in progress. Special compresses placed onto the surface of the salinated building are used for the purpose.
The scale of the facility and the complexity of desalination itself resulting from the size and heterogeneity of the semibasement walls enforced the necessity to determine the appropriate scope of the works and assign them individually to each wall in the particular parts of the cellars. In the course of a year, in three stages, the majority of the wall surface was successfully covered with the first compress. The desalination method adopted does not bring about instant results, and the possibility to assess its final effects requires time.

The subject of the analytical and experimental studies therein is of two metal seven-layer beam - plate bands. The first beam - plate band is composed of a lengthwise trapezoidally corrugated main core and two crosswise trapezoidally corrugated cores of faces. The second beam - plate band is composed of a crosswise trapezoidally corrugated main core and two lengthwise trapezoidally corrugated cores offaces. The hypotheses of deformation of a normal to the middle surface of the beams after bending are formulated. Equations of equilibrium are derived based on the theorem of minimum total potential energy. Three-point bending of the simply supported beams is theoretically and experimentally studied. The deflections of the two beams are determined with two methods, compared and presented.

In February 2022, Russian troops invaded Ukraine, continuing a war that lasted since 2014. This turn of events led to massive migration of Ukrainian refugees to Poland, during which the country received approx. 2 million new inhabitants. The rapid migrational process led to attitudinal changes in the host country's population. This article reviews survey studies conducted at the Center for Research on Prejudice at the University of Warsaw (cross-sectional and longitudinal) assessing the attitudes of Poles toward Ukrainians. According to our data, the attitudes of Poles toward Ukraine improved after the 2022 Russian invasion (compared to 2021), and our longitudinal studies confirmed that this change was relatively long-lasting – the attitudes did not deteriorate substantially. A study looking at attitudes toward war refugees from Ukraine and refugees from other countries found that Poles showed significantly higher acceptance of Ukrainian refugees than those from other countries, which could be largely attributed to greater contact with Ukrainians. Furthermore, Poles expressed relatively high acceptance of state support for healthcare and education of Ukrainian refugees, whereas the acceptance of direct financial support and housing was relatively lower.

In this study, atlases of wave characteristics and wave energy for the Barents Sea have been generated for the years from 1996 to 2015 based on ERA-Interim datasets from the European Centre for Medium-Range Weather Forecasts (ECMWF). The wave power resources in the Barents Sea can be exploited with sea ice extent declining in recent years. The entire Barents Sea has been divided into multi-year sea ice zones, seasonal sea ice zones and open water zones according to the 20-year averaged sea ice concentration. In the entire domain, the spatial distributions of the annual averaged and mean monthly significant wave heights and wave energy flux are presented. For the open water zones, 15 points have been selected at different locations so as to derive and study the wave energy roses and the inter-annual wave power variation. Moreover, the correlations between the wave energy period and the significant wave height are shown in the energy and scatter diagrams. The maximum wave power occurs in the winter in the western parts of the Barents Sea with more than 60kW/m. The wave energy can therefore be exploited in the open water zones.