7,270 research outputs found
Bell's Theorem from Moore's Theorem
It is shown that the restrictions of what can be inferred from
classically-recorded observational outcomes that are imposed by the no-cloning
theorem, the Kochen-Specker theorem and Bell's theorem also follow from
restrictions on inferences from observations formulated within classical
automata theory. Similarities between the assumptions underlying classical
automata theory and those underlying universally-unitary quantum theory are
discussed.Comment: 12 pages; to appear in Int. J. General System
An introduction to the genus Sordaria
An introduction to the genus Sordari
Continuing the Downward Spiral for Unions - Carpenters v. Zcon Builders
Since their inception during the post-war years, collective bargaining agreements have been the primary method used by unions to get employers to deal with issues of importance to their labor force. However, the past few decades have seen a rapid decline in union membership as well as union effectiveness. 3 This casenote will look at whether or not the instant decision, Zcon, will be a contributing factor in the continuing downward spiral for unions
Apollo telescope mount: A partial listing of scientific publications and presentations, supplement 3
Compilations of bibliographies from the principal investigator groups of the Skylab solar observatory facility that gathered data from May 28, 1973, to February 8, 1974 are presented. The analysis of these data is presently under way. The publications listed are divided into the following categories: (1) journal publications; (2) journal publications submitted; (3) other publications; (4) presentations-national and international meetings; and (5) other presentations
Buckling behavior of Rene 41 tubular panels for a hypersonic aircraft wing
The buckling characteristics of Rene 41 tubular panels for a hypersonic aircraft wing were investigated. The panels were repeatedly tested for buckling characteristics using a hypersonic wing test structure and a universal tension/compression testing machine. The nondestructive buckling tests were carried out under different combined load conditions and in different temperature environments. The force/stiffness technique was used to determine the buckling loads of the panel. In spite of some data scattering, resulting from large extrapolations of the data fitting curve (because of the termination of applied loads at relatively low percentages of the buckling loads), the overall test data correlate fairly well with theoretically predicted buckling interaction curves. Also, the structural efficiency of the tubular panels was found to be slightly higher than that of beaded panels
Interactions Among Root Disease Pathogens and Bark Beetles in Coniferous Forests
At least two interactions exist among these important groups of organisms: (1) that of the bark beetles as vectors; and (2) that of root pathogens as predisposers of trees to beetles. Bark beetles might be important vectors of root decay fungi, but there is as yet little supporting evidence. However, some beetles may have primary roles as vectors on non-decay pathogens such as Leptographium wageneri, L. procera, and L. terebrantis. Possible of greater importance is predisposition of trees by the pathogens. Evidence continues to build supporting the relationship, and there is a suggestion that beetles can maintain a relatively high populations level in areas with above average disease activity. A few studies have shown effects on host physiology that may be related to increased susceptibility to bark beetles, and one of two have even suggested effects on primary attraction. A review of the literature in both forest pathology and forest entomology shows a serious deficiency in research on these interactions and their significance in resource management
Cosmological Cosmic Rays: Sharpening the Primordial Lithium Problem
Cosmic structure formation leads to large-scale shocked baryonic flows which
are expected to produce a cosmological population of structure-formation cosmic
rays (SFCRs). Interactions between SFCRs and ambient baryons will produce
lithium isotopes via \alpha+\alpha \to ^{6,7}Li. This pre-Galactic (but
non-primordial) lithium should contribute to the primordial 7Li measured in
halo stars and must be subtracted in order to arrive to the true observed
primordial lithium abundance. In this paper we point out that the recent halo
star 6Li measurements can be used to place a strong constraint to the level of
such contamination, because the exclusive astrophysical production of 6Li is
from cosmic-ray interactions. We find that the putative 6Li plateau, if due to
pre-Galactic cosmic-ray interactions, implies that SFCR-produced lithium
represents Li_{SFCR}/Li_{plateau}\approx 15% of the observed elemental Li
plateau. Taking the remaining plateau Li to be cosmological 7Li, we find a
revised (and slightly worsened) discrepancy between the Li observations and Big
Bang Nucleosynthesis predictions by a factor of ^7Li_{BBN}/^7Li_{plateau}
\approx 3.7. Moreover, SFCRs would also contribute to the extragalactic
gamma-ray background (EGRB) through neutral pion production. This gamma-ray
production is tightly related to the amount of lithium produced by the same
cosmic rays; the 6Li plateau limits the pre-Galactic (high-redshift) SFCR
contribution to be at the level of I_{\pi_{\gamma}SFCR}/I_{EGRB} < 5% of the
currently observed EGRB.Comment: 4 pages, accepted for publication in PR
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