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A concept map consists of nodes representing concepts and links representing the relationships between the concepts. To examine the influence of concept mapping on learning from texts, we varied the support strategies. Eighty students either learned by constructing concept maps on their own, by correcting an incorrect worked-out map, or by studying a(More)
This study aimed to investigate psychological stress and endocrine responses during 5 days of head-down tilt bed rest (HDTBR) with or without the impact of artificial gravity (AG). Participants were assigned to one of three bed-rest-protocols either with (i) no centrifugation, (ii) continuous 30 min (AG1) or (iii) discontinuous 6 × 5 min (AG2)(More)
During interplanetary exploration, chronic stress caused by long term isolation and confinement in the spacecraft is one of the major concerns of physical and psychological health of space travelers. And for human on Earth, more and more people live in an isolated condition, which has become a common social problem in modern western society. Collective(More)
Collective evidence indicates that previous exposure to stressful condition might be able to induce changes in brain structure, HPA axis activity and related neurotransmission, and accordingly affect physiological responses to subsequent challenges. During long-term spaceflight, space travelers have to live under the condition of isolation and confinement(More)
Head-down-tilted bed rest (HDTBR) induces headaches similar to headaches during space flights. The objective of this investigation was to study hematological, endocrinological, fluid changes and tight junctions in HDTBR-induced headaches as a proxy for space headache. The randomized crossover HDTBR design by the European Space Agency included 12 healthy,(More)
Environmental factors have long been known to influence immune responses. In particular, clinical studies about the association between migration and increased risk of atopy/asthma have provided important information on the role of migration associated large sets of environmental exposures in the development of allergic diseases. However, investigations(More)
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