1 Subjects: “...future concepts...”

2 “...Gender, language and hate speech: Are these concepts unrelated to each other, or is it possible...”

3 “... on relatively rigid concepts about service life, at present, the design-or the upgrading-of these structures...”

4 “... comprising nanoparticles. The concept of nanoparticle-reinforced polymers came about three decades ago...”

5 “..., social activists, and decision-makers who are concerned about clean environment concepts for sustainable...”