نتایج جستجو برای: military expedition
تعداد نتایج: 46888 فیلتر نتایج به سال:
BACKGROUND Retinal hemorrhages have been described as a component of high altitude retinopathy (HAR) in association with altitude illness. In this prospective high altitude study, we aimed to gain new insights into the pathophysiology of HAR and explored whether HAR could be a valid early indicator of altitude illness. METHODOLOGY/PRINCIPAL FINDINGS 28 mountaineers were randomly assigned to t...
Genomics and metagenomics have revolutionized our understanding of marine microbial ecology and the importance of microbes in global geochemical cycles. However, the process of DNA sequencing has always been an abstract extension of the research expedition, completed once the samples were returned to the laboratory. During the 2013 Southern Line Islands Research Expedition, we started the first...
The design process is often introduced with project-based learning employing “authentic” or “real world” design projects. This paper explores the educational potential of a design project with authentic outside-ofthe-classroom impact. Students designed and built single-burner alcohol stoves that were used to cook meals on a four-day wilderness expedition. Half of the students used stoves that t...
After the success of the Communist revolution in 1949, China closed its boundaries to Westerners, ending collaboration between Chinese and American botanists until the 1970s. With the invitation in 1978 to a delegation of American botanists to visit the People’s Republic of China, ties broken three decades earlier were renewed. After the month-long visit, the Americans in turn invited their Chi...
As part of the American Medical Research Expedition to Everest in 1981, we measured hemoglobin concentration, red cell 2,3-diphosphoglycerate (2,3-DPG), Po2 at which hemoglobin is 50% saturated (P50), and acid-base status in expedition members at various altitudes. All measurements were made in expedition laboratories and, with the exception of samples from the South Col of Mt. Everest (8,050 m...
Expedition 309, “Superfast Spreading Rate Crust 2,” successfully deepened Hole 1256D (6.736°N, 91.934°W) by 503 m to a total depth of 1255.1 meters below seafloor (mbsf) or 1005.1 meters subbasement. The average rate of core recovery for the expedition was 36%. Much higher rates of recovery were experienced in the lowermost section of the hole (~70% average below 1200 mbsf). At the end of Exped...
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