1 Subjects: “...medical services...”

2 Subjects: “...service time-cost...”

3 Subjects: “...Social Issues/Migration/Health...”

4 Subjects: “...Internet of things information security...”

5 Subjects: “...intelligent interaction...”

6 Subjects: “...security...”

7 Subjects: “...artificial intelligence, higher education, data mining, cloud computing, university, cybercrime...”

8 Subjects: “...social network security...”