This is the 617th most frequent Catalan word.
actuals
"Actuals" in Catalan means "current" or "present" in English.
Here, 'actuals' is used as an adjective meaning 'current' or 'present', describing the state of the problems.
Els problemes actuals són complexos.
The current problems are complex.
In this sentence, 'actuals' serves as an adjective qualifying 'tecnologies', implying those technologies that exist or are in use at present.
Les tecnologies actuals han canviat molt.
The current technologies have changed a lot.
Here, 'actuals' emphasizes the meaning of 'current' when describing 'temes', referring to topics with relevance at the present moment.