11,543 research outputs found
Direct reading of electrocardiograms and respiration rates
Technique for reading heart and respiration rates is more accurate and direct than the previous method. Index of a plastic calibrated card is aligned with a point on the electrocardiogram. Complexes are counted as indicated on the card and heart or respiration rate is read directly from the appropriate scale
Start/stop switches for testing detonation velocity of explosives
Printed-circuit process produces ordnance-initiated start/stop switches. Method is faster and less costly than fabriction by hand, and produces switches of uniform quality
Flavor Changing Neutral Currents, an Extended Scalar Sector, and the Higgs Production Rate at the LHC
We study extensions of the standard model with additional colored scalar
fields which can couple directly to quarks. Natural suppression of flavor
changing neutral currents implies minimal flavor violation, and fixes the
scalars to transform as (8,2)_1/2 under the SU(3) X SU(2) X U(1) gauge
symmetry. We explore the phenomenology of the standard model with one
additional (8,2)_1/2 scalar, and discuss how this extension can modify flavor
physics and the Higgs boson production rate at the LHC. Custodial SU(2)
symmetry can be implemented for the octet scalars since they transform as a
real color representation. Additional weak scale degrees of freedom needed for
gauge unification are discussed.Comment: Minor change
Loop-Induced Stochastic Bias at Small Wavevectors
Primordial non-Gaussianities enhanced at small wavevectors can induce a power
spectrum of the galaxy overdensity that differs greatly from that of the matter
overdensity at large length scales. In previous work, it was shown that
"squeezed" three-point and "collapsed" four-point functions of the curvature
perturbation can generate these non-Gaussianities and give rise to
so-called scale-dependent and stochastic bias in the galaxy overdensity power
spectrum. We explore a third way to generate non-Gaussianities enhanced at
small wavevectors: the infrared behavior of quantum loop contributions to the
four-point correlations of . We show that these loop effects lead to
stochastic bias, which can be observable in the context of quasi-single field
inflation.Comment: 10 pages, 4 figure
Is Life Singularly Nested or Not?
Life forms have long been assumed to be arranged in a single, inviolably nested hierarchal pattern. However, evidences of typology, examples of chimeromorphs, problematica, low orthologous gene frequencies, horizontal gene transfer, iterative, convergent, parallel, and heterochronic evolution, and alternate classifications from changes in taxonomic prioritization of characters, as well as cladistic observations of unresolved multichotomies, abundant most-parsimonious cladograms, low consistency Indexes, and increased character weighting suggest that more than one hierarchal pattern might be equally and simultaneously true. Biblical bioclassification not only classifies organisms differently from modern bioclassification, but also appears to be purposely flexible -- varying according to the specific needs of the one who uses the classification. Divinely instituted hierarchies of family, government, and church are neither inviolably nested nor descriptive of all the complex, many times hierarchy-contradicting relationships which exist within the institutions. Man creates things which can be grouped into multiple, equally valid classifications, and God\u27s very nature cannot be described by any single hierarchy. It would seem that neither God\u27s nature nor His creation (reflective of His nature) is arranged in a singular nested pattern A multiple-nested and/or networked pattern for life should be seriously considered by creationists for superbaraminic classification
Modeling the Uptake and Transpiration of TCE Using Phreatophytic Trees
Phytoremediation is a recent addition to the numerous methods used today to remediate ground water contaminants. It is proving more effective and efficient compared to existing remediation techniques. The use of phreatophytes, or water seeking trees, has great potential for phytoremediation. These trees are fast growing, long lived, grow their roots down to the ground water table, transpire large amounts of water, and are proven to actively remove contaminants from the soil horizon. The purpose of this research is to develop quantitative concepts for understanding the dynamics of TCE uptake and transpiration by phreatophytic trees over a short rotation woody crop time frame. This will he done by constructing a system dynamics model of this process and running it over a wide range of conditions. This research will offer managers a tool to simulate long-term uptake and transpiration of TCE at potential sites. The results of this study indicate that TCE is actively removed from the soil horizon by phreatophytic trees and a significant proportion of this TCE is then transpired. Changes in soil horizon parameters, xylem flow rates, and variables in the uptake equation greatly influence TCE uptake rates as well as transpiration. Also, parameters used in equations representing flows in and out of the leaf greatly influence transpiration. Better understanding of these processes is essential for managers to accurately predict the amount of TCE removed and transpired during potential phytoremediation projects
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