This is the 5169th most frequent Russian word.
недавнего
"Недавнего" means "recent."
Here, 'недавнего' is the genitive singular masculine form and is used to describe the magazine as something just recently published.
Я читал интересную статью из недавнего журнала.
I read an interesting article from a recent magazine.
In this case, 'недавнего' modifies 'события,' meaning 'event,' a specific occurrence that recently happened.
После недавнего события все чувствовали себя неуверенно.
After the recent event, everyone felt uncertain.
Here, 'недавнего' is used to describe 'исследования,' meaning 'study,' indicating a scientific study conducted recently.