منابع مشابه
The Upward Path to Structural Realism
In a recent PSA paper (2001a), as well as some other papers (1995, 2000, 2001b) and a book chapter (1999, Chapter 7), Stathis Psillos raised a number of objections against structural realism. The aim of this paper is threefold: (1) to evaluate part of Psillos’ offence on the Russellian version of epistemic structural realism (ESR); (2) to elaborate more fully what Russellian ESR involves; and (...
متن کاملUpward Spirality and Upward Planarity Testing
The upward planarity testing problem is known to be NPhard. We describe an O(n)-time upward planarity testing and embedding algorithm for the class of digraphs that do not contain rigid triconnected components. We also present a new FPT algorithm that solves the upward planarity testing and embedding problem for general digraphs.
متن کاملA dopaminergic deficit hypothesis of schizophrenia: the path to discovery
In contrast to the conventional view of dopamine involvement in schizophrenia, which posits hyperactive dopaminergic transmission, we propose that for unknown developmental and/or biochemical reasons, a primary defect occurs in efficient, tight dopaminergic synaptic transmission, triggering feedback activation and receptor upregulation, and resulting in the well-characterized increase in dopami...
متن کاملCrossing-Optimal Acyclic Hamiltonian Path Completion and Its Application to Upward Topological Book Embeddings
Given an embedded planar acyclic digraph G, we define the problem of acyclic hamiltonian path completion with crossing minimization (Acyclic-HPCCM) to be the problem of determining a hamiltonian path completion set of edges such that, when these edges are embedded on G, they create the smallest possible number of edge crossings and turn G to an acyclic hamiltonian digraph. Our results include: ...
متن کاملNeural synchrony, axonal path lengths, and general anesthesia: a hypothesis.
Despite decades of research, the mechanism by which general anesthetics produce loss of consciousness remains mysterious. A clue may be provided by the evidence that synchronous firing of cortical neurons underlies higher forms of neural processing. In order for these synchrony codes to be precise, transmission time must be independent of path length over all the connected sites between any two...
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ژورنال
عنوان ژورنال: The American Journal of Philology
سال: 1960
ISSN: 0002-9475
DOI: 10.2307/292532