منابع مشابه
Oxygen cylinders: "life" or "death"?
Oxygen is crucial to maintain and save human life. Other than medical purposes it is widely used for manufacture of mineral water, fabrication works and other industrial activities. If adequate precautionary measures are not adopted while handling, storage or transport of oxygen cylinder or container, accidental blast may claim human life and other damage as well. The case involving three victi...
متن کاملLower and upper bounds on the number of empty cylinders and ellipsoids
Given a set S of n points in three dimensions, we study the maximum numbers of quadrics spanned by subsets of points in S in several ways. Among various results we prove that the number of empty circular cylinders is between Ω(n) and O(n) while we have a tight bound Θ(n) for empty ellipsoids. We also take interest in pairs of empty homothetic ellipsoids, with application to the number of combin...
متن کاملRefillable oxygen cylinders may be an alternative for ambulatory oxygen therapy in COPD.
STUDY OBJECTIVES To compare, in clinical conditions, the efficacy of refilled oxygen cylinders (O2-HFs) in improving oxygenation and exercise capacity of patients with COPD during a 6-min walking test. DESIGN Prospective randomized study with a cross-over design. SETTING A university teaching hospital. PATIENTS Ten patients with COPD, in a stable state and previously treated with long-ter...
متن کاملEmpty chateaux
When I woke up on the morning of Tuesday 27th June 2000, I noticed no change at all. I telephoned a few friends and they confirmed that their lives were not much different that morning. One said he had a slight hangover but he could account for this minor deviation. For years we had been told that once we had the sequence of the human genome, everything would change. So how come after the rough...
متن کاملEmpty Alternation
We introduce the notion of empty alternation by investigating alternating automata which are restricted to empty their storage except for a logarithmically space-bounded tape before making an alternating transition. In particular, we consider the cases when the depth of alternation is bounded by a constant or a polylogarithmic function. In this way we get new characterizations of the classes AC...
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ژورنال
عنوان ژورنال: British Journal of Anaesthesia
سال: 1977
ISSN: 0007-0912
DOI: 10.1093/bja/49.1.87