Acknowledgments
We would like to thank the organizers of the conference and all contributors and attendees of ICCI-2015 at El Jadida, Morocco. Sincere thanks are expressed to the contributors of this special issue for providing excellent and important contributions. The guest editors are grateful to the reviewers who volunteered their time and to the editorial office of Ichnos Journal, especially Murray Gingras and S. George Pemberton, for their encouragement and support.