منابع مشابه
Climbing a Legendrian Mountain Range without Stabilization
In [EH], Etnyre and Honda provide a classification of the Legendrian isotopy classes for a (2, 3)-cable of a (2, 3)-torus knot as it is embedded in S with the standard contact structure. To do this, they use the theory of convex surfaces in a tight contact structure. Their classification takes the visual form of a mountain range formed from points having values of (r, tb), where r is the rotati...
متن کاملAcute Mountain Sickness - Prediction and Treatment during Climbing Expeditions
Acute mountain sickness (AMS) is a common problem while ascending at high altitude. AMS may progress rapidly with fatal results if the acclimatization process fails or symptoms are neglected and the ascent continues. It affects 25% of those ascending to altitudes of 1850 to 2750 m, 42% at altitudes of 3000 m, and even 84% of those attempting a tourist flight to Lhasa, Tibet (3860 m). The most c...
متن کاملGlobus pallidus lesions associated with high mountain climbing.
Acute mountain sickness (AMS) occurs commonly in hikers who are rapidly exposed to high altitude environments. Despite the numerous reports of AMS, few studies have reported pallidal lesions associated with altitude sickness. A previously healthy 49-yr-old Korean patient, after ascent to 4,700 m, suffered symptoms consistent with AMS. After returning home, the patient showed changes in personal...
متن کاملMotivations for Mountain Climbing: The Role of Risk
Using people actively involved in mountain climbing, this thesis explores people‟s motivations to participate in mountain climbing, an activity frequently characterised in terms of risk. Moreover, using a variety of both quantitative and qualitative methods the assessment of the role of risk as a motivation for mountain climbing is central to the thesis. The first study (N = 232) employed a the...
متن کاملExercise intensity typical of mountain climbing does not exacerbate acute mountain sickness in normobaric hypoxia.
Physical exertion is thought to exacerbate acute mountain sickness (AMS). In this prospective, randomized, crossover trial, we investigated whether moderate exercise worsens AMS in normobaric hypoxia (12% oxygen, equivalent to 4,500 m). Sixteen subjects were exposed to altitude twice: once with exercise [3 × 45 min within the first 4 h on a bicycle ergometer at 50% of their altitude-specific ma...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1907
ISSN: 0036-8733
DOI: 10.1038/scientificamerican04201907-26167asupp