1 Subjects: “...art construction...”

2 “... of their structure-property relationships. The developments in new experimental concepts and their state-of-the-art...”

3 “... advances in the state-of-the-art of mathematical methods, theoretical studies, or experimental studies...”

4 “... in the past.Finally, the reader can learn about the state-of-the-art of education initiatives to train site managers...”

5 “..., district, and regional systems planning. This Special Issue aims at providing the state-of-the-art on open...”