7,910 research outputs found
Catalytic reactor with disposable cartridge
Catalytic reactor, disposable cartridge enclosing iron catalyst, acts as container for solid carbon formed by decomposition of carbon monoxide. Deposition of carbon in other parts of oxygen recovery system does not occur because of lack of catalytic activity; filters trap carbon particles and prevent their being transported outside reaction zone
An Alternative to Spinning Dust for the Microwave Emission of LPH 201.663+1.643: an Ultracompact HII Region
The microwave spectral energy distribution of the dusty, diffuse H II region
LPH 201.663+1.643 has been interpreted by others as tentative evidence for
microwave emission from spinning dust grains. We present an alternative
interpretation for that particular object; specifically, that an ultracompact H
II region embedded within the dust cloud would explain the available
observations as well or better than spinning dust. Parameters for the size,
surface brightness, and flux density of the putative ultracompact HII region,
derived from the microwave observations, are within known ranges. A possible
candidate for such an ultracompact H II region is IRAS 06337+1051, based upon
its infrared colors. However, IRAS 06337+1051's infrared flux appears to be too
small to be consistent with the microwave flux required for this alternative
model to explain the observations.Comment: 11 pages, 3 figures, accepted to ApJ Letter
Personality predictors of levels of forgiveness two and a half years after the transgression
The aim of the present study was to explore whether the domains and facets of the five-factor model of personality predicted motivational states for avoidance and revenge following a transgression at a second temporal point distant from the original transgression. A sample of 438 university students, who reported experiencing a serious transgression against them, completed measures of avoidance and revenge motivations around the transgression and five-factor personality domains and facets at time 1, and measures of avoidance and revenge motivations two and a half years later. The findings suggest that neuroticism, and specifically anger hostility, predicts revenge and avoidance motivation
Effects of Nitrogen Fertilization on Monoterpenes of Jack Pine Seedlings and Weight Gain of Jack Pine Budworm (Lepidoptera: Tortricidae)
Nine-month old jack pine (Pinus banksiana) seedlings were grown in a greenhouse under four nitrogen fertilization regimes. Levels of total nitrogen and five monoterpenes in new foliage were measured. Fertilization resulted in four significantly different levels of foliar nitrogen; means ranged from 1.8-4.5 percent dry weight. Contrary to predictions of resource availability theory, seedlings grown under the highest fertilization regime had higher foliar monoterpene levels than seedlings in the other treatments. Newly molted, sixth-instar female jack pine budworm (Choristoneura pinus pinus [Lepidoptera: Tortricidae]) larvae were allowed to feed for four days on new foliage of the seedlings. Larvae that fed on low-nitrogen seedling gained less weight and process more vegetation than did larvae on high- nitrogen seedlings. Larval weight gain was positively related to foliar nitrogen
Goldstone Gauginos
Models of supersymmetry with Dirac gauginos provide an attractive scenario
for physics beyond the standard model. The "supersoft" radiative corrections
and suppressed SUSY production at colliders provide for more natural theories
and an understanding of why no new states have been seen. Unfortunately, these
models are handicapped by a tachyon which is naturally present in existing
models of Dirac gauginos. We argue that this tachyon is absent, with the
phenomenological successes of the model preserved, if the right handed gaugino
is a (pseudo-)Goldstone field of a spontaneously broken anomalous flavor
symmetry.Comment: 5 pages, 1 figure. v2: minor changes to text, references added and
update
Models of Goldstone Gauginos
Models with Dirac gauginos provide appealing scenarios for physics beyond the
standard model. They have smaller radiative corrections to the Higgs mass, a
suppression of certain SUSY production processes, and ameliorated flavor
constraints. Unfortunately, they also generally have tachyons, the solutions to
which typically spoil these positive features. The recently proposed "Goldstone
Gaugino" mechanism provides a simple solution that eliminates these tachyonic
states. We provide details on this mechanism and explore models for its origin.
In particular, we find SUSY QCD models that realize this idea simply, and
discuss scenarios for unification.Comment: 33 pages, 4 figure
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