Fatigue Limit Evaluation of AZ31B Magnesium Alloy Based on Temperature Distribution Analysis

In this paper, the fatigue limit of AZ31B magnesium alloy is evaluated according to the surface temperature of the specimen during the test. Considering the influence of external heating, a special data-processing method is used to filter the raw temperature data obtained by the infrared camera. A thermal indicator based on the analysis of superficial temperature distribution is described and proposed. In contrast, most existing thermal indicators are calculated based on temperature evolution. Three existing algorithms were used to evaluate the fatigue limit of AZ31B magnesium alloy based on the newly proposed thermal indicator. In addition, the results of the test were used to compare with the results of traditional methods. It has been proved that the fatigue limit of AZ31B magnesium alloy can be assessed by using the new thermal indicator based on temperature distribution.

SEMANTICS OF PHRASEOLOGICAL UNITS WITH THERMAL COMPONENT DENOTING HUMAN EMOTIONAL CHARACTERISTICS

The article focuses on the peculiarities of the semantics of phraseologisms with a thermal component denoting emotional characteristics of a person on the material of the Ukrainian, German and English languages. The work is carried out in line with the anthropocentric paradigm, in the framework of which attention is directed to a person as a subject of research, especially to his way of perceiving and conceptualizing the world. Common, similar, and national features that are different in terms of phraseological imagery should be determined by comparing relatively small segments in the phraseology of Ukrainian, German, and English through a multidimensional analysis of their structural and semantic features. The article discusses the components of phraseological units with any thermal indicator – both for cold and high temperature. In the field of phraseology the cultural identity is manifested mainly in the figurative basis (inner form) of phraseological units, despite the fact that the types of rethinking of the studied phraseologisms are reduced primarily to metaphor, metonymy and figurative simile. Unique phraseological units as a reflection of the originality of national culture, mentality and language can be present in all groups of studied units, thus, some components with temperature characteristics are part of phraseological units of all studied languages, while others are less common or identified on the basis of a separate language.

Diversity of Vascular Flora of Waste Dumps and Dumping Grounds in Lower Silesia

The paper presents results of floristic investigation conducted within the territory of waste dumps in Lower Silesia: landfill of municipal waste Wrocław-Maślice, post-metallurgic waste heap in Siechnice, serpentine dumping grounds in Grochów and slag heaps in Bielawa. The investigated flora was analyzed with regard to species composition, participation of geographical-historical groups, live forms (according to classification by Raunkiaer), as well as selected ecological factors: light indicator (L), thermal indicator (T), soil moisture (W), trophic indicator (Tr), soil reaction (pH), value of resistance to increased heavy metals content (M). On 4 waste dumps there were found 269 species of vascular plants, belonging to 51 families. Only 5 species occurred on 4 sites, which provides for 2% of all plants recorded. The most numerous families are Asteraceae, Poaceae and Fabaceae. Apophytes dominate in waste dumps flora Hemicryptophytes are the most numerous group. Analysis of the floras (selected ecological factors) of investigated objects has shown general similarities, but also apparent differences. The most significant differences concerned two parameters: trophism (Tr) and resistance to increased heavy metals content (M).

Theoretical and model analysis of the unreliability of cardiac output measurement by means of the thermodilution method

Theoretical and model analysis of the unreliability of cardiac output measurement by means of the thermodilution methodThermodilution is the clinically most often applied method of cardiac output measurements. This method is based on thermal indicator (iced isotonic salt solution) variation measurements by a Swan-Ganz catheter located inside the pulmonary artery. The unreliability of thermodilution should be estimated theoretically because of the lack of references. In this paper an attempt has been made to estimate theoretically the unreliability of thermodilution cardiac output measurements.