1,010 research outputs found
Digestion Coefficients with Sheep
This work in determining Digestion Coefficients with South Dakota grown forage plants and feeding stuffs was commenced in the Fall of 1905. Six grade Merino wethers were secured for this purpose. They were taken up and handled daily until they were perfectly accustomed to their attendant before the feeding trial were started they were kept in a box stall during each trial and were so tied that no one of them could reach the feed box of another. Harnesses were provided by means of which sacks were attached to each sheep to receive the faeces. [sic] The arrangement is shown by the cut on the title page. The sheep soon became accustomed to the harnesses and care was taken that they should be perfectly contented with their surroundings before the actual experiments commenced. In the case of hays and fodders the feed was run through a cutting machine reducing it to half inch lengths. Any refuse was carefully saved, weighed back and analyzed. Each feeding stuff was analyzed and the faeces were also analyzed. Careful moisture determinations were made on the feeding stuff as fed and on the faeces. From these data the digestion coefficients have been determined
Enhancing Tc in field-doped Fullerenes by applying uniaxial stress
Capitalizing on the two-dimensional nature of superconductivity in
field-effect doped C60, we show that it should be possible to increase the
transition temperature Tc by applying uniaxial stress perpendicular to the gate
electrode. This method not only holds the promise of substantially enhancing Tc
(by about 30 K per GPa), but also provides a sensitive check of the current
understanding of superconductivity in the doped Fullerenes.Comment: 3 pages RevTe
Effects of salience are short-lived
A salient event in the visual field tends to attract attention and the eyes. To account for the effects of salience on visual selection, models generally assume that the human visual system continuously holds information concerning the relative salience of objects in the visual field. Here we show that salience in fact drives vision only during the short time interval immediately following the onset of a visual scene. In a saccadic target-selection task, human performance in making an eye movement to the most salient element in a display was accurate when response latencies were short, but was at chance when response latencies were long. In a manual discrimination task, performance in making a judgment of salience was more accurate with brief than with long display durations. These results suggest that salience is represented in the visual system only briefly after a visual image enters the brain. Copyright © 2008 Association for Psychological Science
Monte Carlo calculations for the hard Pomeron
Starting from the same input as the standard BFKL Pomeron, we directly
calculate the ``hard'' Pomeron as a gluonic ladder by using Monte Carlo
methods. We reproduce the characteristic features of the the BFKL Pomeron and
are now also able to evaluate new observables. The applicability of the BFKL
approach under realistic kinematical conditions can be tested and the influence
of the running coupling constant examined.Comment: 9 pages and 4 figures included. To appear in Phys.Lett.
The off-Shell Electromagnetic Vertex of the Nucleon in Chiral Perturbation Theory
We study the electromagnetic vertex of a nucleon in next-to-leading order
chiral perturbation theory (CPT). We consider the case where one of the
nucleons at the NN vertex is off its mass shell. We define relevant
measures for the off-shell dependence in the limited kinematical range allowed,
and analyze their expansion in the pion mass. The leading nonanalytic
contributions are calculated to estimate their size.Comment: 12 pages (LaTeX), 1 figure (available upon request), NIKHEF 93-P
On the Number of Facets of Three-Dimensional Dirichlet Stereohedra III: Full Cubic Groups
We are interested in the maximum possible number of facets that Dirichlet
stereohedra for three-dimensional crystallographic groups can have. The problem
for non-cubic groups was studied in previous papers by D. Bochis and the second
author (Discrete Comput. Geom. 25:3 (2001), 419-444, and Beitr. Algebra Geom.,
47:1 (2006), 89-120). This paper deals with ''full'' cubic groups, while
''quarter'' cubic groups are left for a subsequent paper. Here, ''full'' and
''quarter'' refers to the recent classification of three-dimensional
crystallographic groups by Conway, Delgado-Friedrichs, Huson and Thurston
(math.MG/9911185, Beitr. Algebra Geom. 42.2 (2001), 475-507).
Our main result in this paper is that Dirichlet stereohedra for any of the 27
full groups cannot have more than 25 facets. We also find stereohedra with 17
facets for one of these groups.Comment: 28 pages, 12 figures. Changes from v1: apart of some editing (mostly
at the end of the introduction) and addition of references, an appendix has
been added, which analyzes the case where the base point does not have
trivial stabilize
The pion form factor in improved lattice QCD
We calculate the electromagnetic form factor of the pion in lattice gauge
theory. The non-perturbatively improved Sheikoleslami-Wohlert lattice action is
used together with the O(a) improved current. The form factor is compared to
results for other choices for the current and features of the structure of the
pion deduced from the 'Bethe-Salpeter wave function' are discussed.Comment: 8 pages, LaTex, 2 figure
Sudden Increases in Listeriosis Rates in England and Wales, 2001 and 2003
The monthly incidence of listeriosis infections in England and Wales had 2 sudden increases during April 2001 (41%) and March 2003 (48%). Although no causative association is demonstrated, these increases correspond to key dates relating to the onset and aftermath of the 2001 foot and mouth disease outbreak in the United Kingdom
Center or Limit Cycle: Renormalization Group as a Probe
Based on our studies done on two-dimensional autonomous systems, forced
non-autonomous systems and time-delayed systems, we propose a unified
methodology - that uses renormalization group theory - for finding out
existence of periodic solutions in a plethora of nonlinear dynamical systems
appearing across disciplines. The technique will be shown to have a non-trivial
ability of classifying the solutions into limit cycles and periodic orbits
surrounding a center. Moreover, the methodology has a definite advantage over
linear stability analysis in analyzing centers
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