INTRODUCTION The American continent is very rich in psychoactive plants and fungi, and many pre-Columbian Mesoamerican cultures used them for magical, therapeutic and religious purposes. OBJECTIVES The archaeological, ethno-historical and ethnographic evidence of the use of hallucinogenic substances in Mesoamerica is reviewed. RESULTS Hallucinogenic cactus, plants and mushrooms were used to...

The concept of ceremony is introduced as an extension of the concept of network protocol, with human nodes alongside computer nodes and with communication links that include UI, human-to-human communication and transfers of physical objects that carry data. What is out-of-band to a protocol is in-band to a ceremony, and therefore subject to design and analysis using variants of the same mature ...

The social engagement and self-rated health of retirees were studied for gender differences in a Nigerian setting. The study was based on the hypothesis that gender difference in the level of social engagement entailing particularly, the traditional ceremonies may be reflected in differential self-rated health. The engagement (visitations, traditional ceremonies, religious activities and leisur...

The actor network procedures of Pavlovic and Meadows are a recent graphical formalism developed for describing security ceremonies and for reasoning about their security properties. The present work studies the relations of the actor network procedures (ANP) to the recent psi-calculi framework. Psi-calculi is a parametric formalism where calculi like spior applied-pi are found as instances. Psi...

We blend research from human-computer interface (HCI) design with computational based cryptographic provable security. We explore the notion of practice-oriented provable security (POPS), moving the focus to a higher level of abstraction (POPS+) for use in providing provable security for security ceremonies involving humans. In doing so we highlight some challenges and paradigm shifts required ...

The actor network procedures of Pavlovic and Meadows are a recent graphical formalism developed for describing security ceremonies and for reasoning about their security properties. The present work studies the relations of the actor network procedures (ANP) to the recent psi-calculi framework. Psi-calculi is a parametric formalism where calculi like spior applied-pi are found as instances. Psi...