The coal is the most important disposable energy in our country. Coal resources play a strategic role in our country's economic and social development, but there are a series of ecological environment problems about the mining and the utilization of coal resources. These problems in the coal mining area have already become an obstacle to the sustainable development and also a major hidden dange...

We present the design of a user study for comparing the security of two registration mechanisms for initializing credentials in machine authentication protocols, such as SiteKey. We discuss ethical and ecological validity challenges we faced in designing our study.

Changes in ecological vulnerability were analyzed for Northern Shaanxi, China using a geographic information system (GIS). An evaluation model was developed using a spatial principal component analysis (SPCA) model containing land use, soil erosion, topography, climate, vegetation and social economy variables. Using this model, an ecological vulnerability index was computed for the research reg...

This article reviews proposals regarding the recent food crisis in the context of a broader, threshold debate on the future of agriculture and food security. While the MDGs have focused on eradicating extreme poverty and hunger, the food crisis pushed the hungry over the one billion mark. There is thus a renewed focus on agricultural development, which pivots on the salience of industrial agric...

This paper outlines a framework for understanding gameplay from the perspective of ecological psychology. According to this perspective, gameplay can be described in terms of perceiving, acting on and transforming the affordances that are related to a game system or to other players in a game. Challenges in games have an emphasis on perceiving suitable actions and/or performing suitable actions...