Waldheimia glabra is traditionally used as incense and as an anti-influenza drug by Tibetans in China. Here, we collected W. glabra from the Gangs Rinpoche mountain at an altitude of 5200 m, and analyzed its essential oil by gas chromatography-mass spectrometry (GC-MS) combined with the retention indices (RI). Twenty-seven compounds, representing 72.4% of the total essential oil, were identifie...

In this paper we present a formal basis for the development of intelligent learning environments that are capable of reasoning about the process of learning and of changing the environment in ways that create possibilities for processes of interaction that increase learning over time. To support this kind of reasoning we have developed a formal account of interaction and of time-extended proces...