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assessment of the efficiency of s.p.g.c refineries using network dea
data envelopment analysis (dea) is a powerful tool for measuring relative efficiency of organizational units referred to as decision making units (dmus). in most cases dmus have network structures with internal linking activities. traditional dea models, however, consider dmus as black boxes with no regard to their linking activities and therefore do not provide decision makers with the reasons...
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Over the past 20 years, the hypothesis that body iron stores are associated with risk of coronary heart disease (CHD) has generated extensive debate (1–4). This debate has intensified in the last 4 years after reports from three studies that carriers of the recently discovered HFE C282Y mutation commonly seen in hereditary hemochromatosis have significantly increased risk of CHD (5–9). Clinical...
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ژورنال
عنوان ژورنال: Kidney International
سال: 1977
ISSN: 0085-2538
DOI: 10.1038/ki.1977.65