Expectations,Experiences, and Memories: Ecotourism and the Possibilities for Transformations

This essay explores how ecotourism destinations and media materials rhetorically construct ecotourists’ anticipations, experiences, and memories through ethnographic and rhetorical analyses. Using theory related to phenomenology, this study examines how expectations are formed through rhetorical tropes such as the sublime, the exotic, and the dangerous adventure. In turn, these expectations direct attentions towards specific experiences and memories. However, because ecotourism activities become critical experiences with other natural and social worlds that supersede everyday practices, these events have the potential to foster critical awareness of self, other, the natural world, and practices related to traveling, shaping the environmental self and identity.     

The Thermodynamic Performance of a Double-Acting Traveling-Wave Thermoacoustic Engine with Liquid-Water Piston

A double-acting traveling-wave thermoacoustic engine with liquid-water piston (DTTELP) was proposed by the authors. This article conducted numerical simulation on its performance for the cases of with and without acoustical loads. The effects of mean working pressure and water-piston mass on its non-load performance were firstly discussed. Then, the output performance of this novel thermoacoustic engine under fixed heating temperature was analyzed. Also, influences of different heating temperatures on the performance of this engine were discussed. According to the simulation, the novel double-acting thermoacoustic heat engine (TTHE) is very efficient and a maximum thermal efficiency can reach about 51% when the heating temperature is 1500 K.