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2 2024

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(EDU)sharenting – between promoting an educational institution and protecting the image of students

Lewandowska Hanna

Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej

2024

Nr 90 (tom 2)

31--42

The publication aims to draw attention to the phenomenon of teachers sharing everyday school activities on the Internet (mainly in social media). Lessons conducted, school events, and implemented pedagogical innovations are often widely discussed in the virtual space. Educational institutions report on school celebrations, trips and competitions in the form of photo reports posted on social media. However, this involves numerous risks for children and young people, similar to the consequences of “sharenting” (a term derived from the words “parenting” and “share”, which describes the practice of parents sharing photos and information about their children on the Internet). A seemingly harmless activity often aimed at promoting the school may turn out to be dangerous for its residents. It is therefore worth knowing its scope. The article presents the results of a survey (CAWI) conducted among professionally active teachers of kindergartens, primary and secondary schools regarding their awareness of the threats resulting from posting students’ images on the Internet. The scale of the phenomenon, the topics of entries and photographs posted by teachers online, as well as the frequency with which they do so are discussed. The motivators for sharing students’ images on social media, as well as teachers’ awareness of the risks resulting from it, are also presented. The publication ends with a summary of compiled data and drawn conclusions that may contribute to changing the situation by developing teachers’ awareness.

Radiolysis of composite polypropylene/hemp fibers

Głuszewski Wojciech, Lewandowska Hanna, Malinowski Rafał, Krasinska Oksana

Nukleonika

2024

Vol. 69, No. 2

45--51

This paper presents the results of the research on the effects of ionizing radiation on the properties of a composite material consisting of polypropylene (PP) and hemp fibers (HFs). The radiolysis effects were investigated for the composites having HF contents in the amounts of 10, 20, 30, and 40% by weight, as well as for pure PP. Particular attention was paid to the protective effects the aromatic compounds contained in the HF had on the radiolysis of PP/HF composites. This phenomenon may explain the deviations that the irradiated composites displayed upon the addition of HFs and their dependency on the HF content. Both the granules and the standardized composite specimens were subjected to radiation treatment. The gas chromatography (GC) technique was employed to determine the yield of radiolytically generated hydrogen (GH2) and absorbed oxygen (GO2). The oxidation phenomenon was studied during irradiation, 24 h after irradiation, and after a 40-day aging period at room temperature. Changes in the melt flow rate (MFR) and the mechanical properties were also determined. It was described how the radiation treatment of the investigated composites accelerates their degradation. It was found that this effect applies to both HF and PP. It was also demonstrated that PP not only does not enhance the resistance of HF to oxidation but, on the contrary, accelerates the processes of their post-radiation degradation. It was further observed that the phenomenon of postradiation degradation can be controlled by changing the PP content in the composite, as well as the amount of aromatic compounds present in the HF. The amount of the absorbed dose allows us to control the degradation time of the PP/HF composites. This applies in particular to the chain oxidation of the PP matrix triggered by the ionizing radiation. It was also found that composites based on PP and natural fibers susceptible to radiation degradation may have significant implications for the use of easily degradable polymer materials in the environment.