127,586 research outputs found
A Bundle Theory of Words
It has been a common assumption that words are substances that instantiate or have properties. In this paper, I question the assumption that our ontology of words requires posting substances by outlining a bundle theory of words, wherein words are bundles of various sorts of properties (such as semantic, phonetic, orthographic, and grammatical properties). I argue that this view can better account for certain phenomena than substance theories, is ontologically more parsimonious, and coheres with claims in linguistics
X-ray Signatures of Circumnuclear Gas in AGN
X-ray spectra of AGN are complex. X-ray absorption and emission features
trace gas covering a wide range of column densities and ionization states. High
resolution spectra show the absorbing gas to be outflowing, perhaps in the form
of an accretion disk wind. The absorbing complex shapes the form of the X-ray
spectrum while X-ray reverberation and absorption changes explain the spectral
and timing behaviour of AGN. We discuss recent progress, highlighting some new
results and reviewing the implications that can be drawn from the data.Comment: Proceedings of the conference "Suzaku 2011, Exploring the X-ray
Universe: Suzaku and Beyond
On the problems of measuring transient temperature in cryogenic fluids
Cryogenic sensor errors in measuring transient temperature in cryogenic fluid
Process for making a noble metal on tin oxide catalyst
A quantity of reagent grade tin metal or compound, chloride-free, and high-surface-area silica spheres are placed in deionized water, followed by deaerating the mixture by boiling and adding an oxidizing agent, such as nitric acid. The nitric acid oxidizes the tin to metastannic acid which coats the spheres because the acid is absorbed on the substrate. The metastannic acid becomes tin oxide upon drying and calcining. The tin-oxide coated silica spheres are then placed in water and boiled. A chloride-free precious metal compound in aqueous solution is then added to the mixture containing the spheres, and the precious metal compound is reduced to a precious metal by use of a suitable reducing agent such as formic acid. Very beneficial results were obtained using the precious metal compound tetraammine platinum(II) hydroxide
Geometry and General Relativity in the Groupoid Model with a Finite Structure Group
In a series of papers we proposed a model unifying general relativity and
quantum mechanics. The idea was to deduce both general relativity and quantum
mechanics from a noncommutative algebra defined on a
transformation groupoid determined by the action of the Lorentz group
on the frame bundle over space-time . In the present work,
we construct a simplified version of the gravitational sector of this model in
which the Lorentz group is replaced by a finite group and the frame bundle
is trivial . The model is fully computable. We define the
Einstein-Hilbert action, with the help of which we derive the generalized
vacuum Einstein equations. When the equations are projected to space-time
(giving the "general relativistic limit"), the extra terms that appear due to
our generalization can be interpreted as "matter terms", as in
Kaluza-Klein-type models. To illustrate this effect we further simplify the
metric matrix to a block diagonal form, compute for it the generalized Einstein
equations and find two of their "Friedmann-like" solutions for the special case
when . One of them gives the flat Minkowski space-time (which,
however, is not static), another, a hyperbolic, linearly expanding universe.Comment: 32 page
Reference incidence angles in constant stagger cascades
Fortran 4 computer program for design application of stagger angle replacing inlet flow angle for given blade cascad
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