منابع مشابه
David Oliver: Binary truths don't help health policy debate.
Stephen Hawking and Jeremy Hunt’s public argument in August over the future of the NHS and use of data led to some hard hitting claims and strong accusations on both sides. 2 In the aftermath of the spat the management consultant Stephen Black wrote a provocative piece on the current state of debate about the NHS. Black’s thesis was that we can’t move forward with constructive solutions to the ...
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We consider a single class open queueing network, also known as a generalized Jackson network (GJN). A classical result in heavy-traffic theory asserts that the sequence of normalized queue length processes of the GJN converge weakly to a reflected Brownian motion (RBM) in the orthant, as the traffic intensity approaches unity. However, barring simple instances, it is still not known whether th...
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In a recent Combinatorics seminar, David A. Jackson introduced the following family of directed graphs {Γn}: Let n ∈ N. The vertex set is V (Γn) = Z/nZ. The directed edge (x, y) ∈ E(Γn) if and only if y = x. We allow loops and double edges. In particular, for any n, the edges (0, 0) and (1, 1) belong to E(Γn). As for double edges, (2, 4) and (4, 2) are both in E(Γ7). Γn consists of some number ...
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Geocomputation is an emerging field of research that advocates the use of computationally intensive techniques such as neural networks, heuristic search, and cellular automata for spatial data analysis. Since increasing amounts of health-related data are collected within a geographical frame of reference, geocomputational methods show increasing potential for health data analysis. This paper pr...
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The hypothesis that earthquake foreshocks have a prognostic value is challenged by simulations of the normal behaviour of seismicity, where no distinction between foreshocks, mainshocks and aftershocks can be made. In the former view, foreshocks are passive tracers of a tectonic preparatory process that yields the mainshock (i.e., loading by aseismic slip) while in the latter, a foreshock is an...
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ژورنال
عنوان ژورنال: Nature
سال: 1999
ISSN: 0028-0836,1476-4687
DOI: 10.1038/nature28122