Small woodlots and shelterbelts in agricultural areas can partially stand in for larger forests. What role do they have in the context of climate change and conservation?

Stanowią namiastkę lasów na terenach rolniczych. Jakie pełnią funkcje w kontekście zmian klimatu i jaki jest ich stan ochrony?

The study makes an attempt to model a complete vibrating guitar including its non-linear features, specifically the tension-compression of truss rod and tension of strings. The purpose of such a model is to examine the influence of design parameters on tone. Most experimental studies are flawed by uncertainties introduced by materials and assembly of an instrument. Since numerical modelling of instruments allows for deterministic control over design parameters, a detailed numerical model of folk guitar was analysed and an experimental study was performed in order to simulate the excitation and measurement of guitar vibration. The virtual guitar was set up like a real guitar in a series of geometrically non-linear analyses. Balancing of strings and truss rod tension resulted in a realistic initial state of deformation, which affected the subsequent spectral analyses carried out after dynamic simulations. Design parameters of the guitar were freely manipulated without introducing unwanted uncertainties typical for experimental studies. The study highlights the importance of acoustic medium in numerical models.

The concept of body image can be considered on many levels, but constant is the fact that it is a mental image: of the size, shape, and form of one’s own body, influencing one’s overall self-image. Previous multifaceted research shows that perceptions of body image can be influenced among other things by physical activity or personality. Therefore, the purpose of this study was to analyze the relationships between body image perception and personality, considering individuals who regularly practice physical activity (N= 104). The following research tools were used: IPIP- BFM-20, Body Esteem Scale and a questionnaire consisting of questions allowing for the respondents’ characterization. Analysis of the collected data revealed that almost half of the respondents are currently dissatisfied with their body image. It was also noted that those who were satisfied with their body image scored statistically significantly higher on two of the five personality traits measured: Extraversion and Emotional Stability. The results obtained showing the relationship between personality and body image perception are consistent with previous studies in which the type of physical activity and its frequency were not examined.