Manufacture and Characterization of Polypropylene (PP) and High-Density Polyethylene (HDPE) Blocks for Potential Use as Masonry Component in Civil Construction.

The lack of suitable destinations for plastics materials can be a global environmental problem. The alternative use of materials for sustainable construction encourages the standardization of waste and promotes effective social, environmental and economic gains at the local level and ensures savings and income for communities. The aim of this paper is the development, manufacture, and characterization of PP and HDPE recycled polyolefin blocks as masonry components in civil construction.

Online challenges among children and adolescents: Self-inflicted harm and social media strategies.

Challenges are in line with the risk-taking practices frequent in child and youth culture. However, online challenges take on new meanings when mediated by digital sociability. To analyze this phenomenon, 122 challenge videos in Portuguese that had been made by Brazilian children or adolescents were recovered from the YouTube platform, of which 35 were selected and transcribed.

Cyberbullying: concepts, dynamics, characters and health implications.

The study aimed to conduct a critical review of a set of bibliographical reviews to identify how the scientific community understands cyberbullying, how the phenomenon has been conceptualized, how its dynamics have been described, what characters are identified and what associations are related to the health of intimidated persons and perpetrators. The literature has shown that there is no consensus on the concept of cyberbullying, but there are arguments that advocate its specificity and differentiation vis-à-vis bullying, (it can occur at any moment and without a physically demarcated space; it can be disseminated globally, the length of permanence of the offensive posts is undetermined). As for the gender issue associated with this practice, a reductionist bias was observed in the debate, indicating differences based on an alleged technological superiority of boys.