Publications by authors named "Jean-Luc Le Pennec"
Most of the nitrogen (N) accessible for life is trapped in dinitrogen (N), the most stable atmospheric molecule. In order to be metabolized by living organisms, N has to be converted into biologically assimilable forms, so-called fixed N. Nowadays, nearly all the N-fixation is achieved through biological and anthropogenic processes.
View Article and Find Full Text PDFA dense system of pre-Hispanic urban centers has been found in the Upano Valley of Amazonian Ecuador, in the eastern foothills of the Andes. Fieldwork and light detection and ranging (LIDAR) analysis have revealed an anthropized landscape with clusters of monumental platforms, plazas, and streets following a specific pattern intertwined with extensive agricultural drainages and terraces as well as wide straight roads running over great distances. Archaeological excavations date the occupation from around 500 BCE to between 300 and 600 CE.
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- The Tungurahua volcano in Ecuador emitted ash between 1999 and 2016, significantly affecting local rural areas, but its health impacts are not well documented.
- Researchers focused on the intense eruptive phase of August 16-17, 2006, mapping ash size distributions and analyzing a specific ash sample for its respiratory health effects.
- Their findings indicate high amounts of inhalable ash, with complex characteristics, resulting in minimal cell damage but some cell changes and a weak pro-inflammatory response in lung cells.
Given the growing demand for studies dealing with natural disasters, the research fields of emotion and social cognition require validated picture stimuli of natural hazards. Such material is essential for studying perceptual processes and behaviors of exposed individuals, and it could find practical applications, such as the improvement of communication strategies during crises. We present the Natural Disasters Picture System (NDPS), a database of pictures of natural hazards, with an emphasis on volcanic threats, and their impact on the environment and humans.
View Article and Find Full Text PDFIn cases of impending natural disasters, most events are uncertain and emotionally relevant, both critical factors for decision-making. Moreover, for exposed individuals, the sensitivity to the framing of the consequences (gain or loss) and the moral judgments they have to perform (e.g.
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