The Festschrift in honor of Prof. Dr. Peter Keller, president of the International Association of Scientific Experts in Tourism (AIEST) since 1994, represents a wide range of tourism research as well as the current state of the ongoing debates in tourism as a scientific research field. The aim...

With progress of communication technologies, it enables rapid development of all kinds of services over the Internet, and we call these services with a name as over the top (OTT). The penetration rate of 4G has increased rapidly and also increased mobile operator's revenue. With the increase of...

Passion - in the sense of fervent commitment to action - and compassion - understood as sensitive openness for social and ecological concerns - are not a sure formula for business success. Whether social or ecological entrepreneurs, who find themselves under pressure from market competition,...