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Medical Education Online, 2016 The training of physicians in the past century was based primarily on responsibility and the chain-of-command. Those with the bulk of that responsibility in the fields of pediatrics and internal medicine were residents. Residents trained the medical students and supervised them carefully in caring for patients.
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Head & Face Medicine, 2020 Background Early childhood caries (ECC) is a type of dental caries in the teeth of infants and children that is represented as one of the most prevalent dental problems in this period. Various studies have reported different types of prevalence of dental
Mohsen Kazeminia +6 more
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Permanent Contraception: Ethical Issues and Considerations
Obstetrics and GynecologyPermanent contraception is the most used method of contraception among women aged 15–49 years and is one of the most straightforward surgical procedures an obstetrician–gynecologist can perform.
MD Mbe MS Shah Arora +3 more
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REE Recovery from End-of-Life NdFeB Permanent Magnet Scrap: A Critical Review
Journal of Sustainable Metallurgy, 2017 NdFeB permanent magnets have different life cycles, depending on the applications: from as short as 2–3 years in consumer electronics to 20–30 years in wind turbines.
Yongxiang Yang +10 more
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Hydrometallurgical Recovery of Rare Earth Elements from NdFeB Permanent Magnet Scrap: A Review
Metals, 2020 NdFeB permanent magnet scrap is regarded as an important secondary resource which contains rare earth elements (REEs) such as Nd, Pr and Dy. Recovering these valuable REEs from the NdFeB permanent magnet scrap not only increases economic potential, but ...
Yuanbo Zhang +5 more
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The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada
Population Ecology, EarlyView.We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley +1 more source
27th Annual Symposium on Foundations of Computer Science (sfcs 1986), 1986 This paper gives the bound \(m>\sqrt{2}n-6\sqrt{n}\) as the smallest possible dimension m for which the n-dimensional permanent function might be expressible as an m-dimensional determinant function. The proof uses algebraic geometry studying the singular loci of the permanent and determinant functions.
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Evaluation of Permanents [PDF]
Proceedings of the Edinburgh Mathematical Society, 1979 The permanent of an m x n matrix A = (aij),m≤n, is defined bywhere the summation is over all one-to-one functions σ from {1, … ,m} to { 1, …,n}. In other words, the permanent of A is the sum of all thediagonal productsofA, that is, all the products ofmentries ofAno two of which lie in the same row or in the same column.
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