1 Subjects: “...physical habitat...”

2 Subjects: “...cyber-physical system...”

3 Subjects: “...physical geography...”

4 Subjects: “...physical factors...”

5 Subjects: “...physical factors...”

6 “...The international concept of food security is a situation where all people have physical, social...”

7 “..., conferences required the physical presence of their members and audiences. However, travel restrictions due...”