6,026 research outputs found
Vector unparticle contributions to lepton g-2
The generic unparticle propagator may be modified in two ways. Breaking the
conformal symmetry effectively adds a mass term to the propagator, while
considering vacuum polarization corrections adds a width-like term. Both of
these modifications result naturally from the coupling of the unparticle to
standard model (SM) fields. We explore how these modifications to the
propagator affect the calculation of the lepton anomalous magnetic moment using
an integral approximation of the propagator that is accurate for
, where is the unparticle dimension. We find that for this
range of and various values of the conformal breaking scale , the
value of calculated when allowing various SM fermions to run in the
unparticle self-energy loops does not significantly deviate from the value of
when the width term is ignored. We also investigate the limits on a
characteristic mass scale for the unparticle sector as a function of and
.Comment: 16 pages, 11 figures, 2 tables. Included neutrinos in loops. Added
reference
Supernova Constraints and Systematic Uncertainties from the First Three Years of the Supernova Legacy Survey
We combine high-redshift Type Ia supernovae from the first three years of the Supernova Legacy Survey (SNLS) with other supernova (SN) samples, primarily at lower redshifts, to form a high-quality joint sample of 472 SNe (123 low-z, 93 SDSS, 242 SNLS, and 14 Hubble Space Telescope). SN data alone require cosmic acceleration at >99.999% confidence, including systematic effects. For the dark energy equation of state parameter (assumed constant out to at least z = 1.4) in a flat universe, we find w = –0.91^(+0.16)_(–0.20)(stat)^(+0.07)_(–0.14)(sys) from SNe only, consistent with a cosmological constant. Our fits include a correction for the recently discovered relationship between host-galaxy mass and SN absolute brightness. We pay particular attention to systematic uncertainties, characterizing them using a systematic covariance matrix that incorporates the redshift dependence of these effects, as well as the shape-luminosity and color-luminosity relationships. Unlike previous work, we include the effects of systematic terms on the empirical light-curve models. The total systematic uncertainty is dominated by calibration terms. We describe how the systematic uncertainties can be reduced with soon to be available improved nearby and intermediate-redshift samples, particularly those calibrated onto USNO/SDSS-like systems
Measurable realizations of abstract systems of congruences
An abstract system of congruences describes a way of partitioning a space
into finitely many pieces satisfying certain congruence relations. Examples of
abstract systems of congruences include paradoxical decompositions and
-divisibility of actions. We consider the general question of when there are
realizations of abstract systems of congruences satisfying various
measurability constraints. We completely characterize which abstract systems of
congruences can be realized by nonmeager Baire measurable pieces of the sphere
under the action of rotations on the -sphere. This answers a question of
Wagon. We also construct Borel realizations of abstract systems of congruences
for the action of on .
The combinatorial underpinnings of our proof are certain types of decomposition
of Borel graphs into paths. We also use these decompositions to obtain some
results about measurable unfriendly colorings.Comment: minor correction
Management of sleep apnea: a critical look at intra‐oral appliances
With so many disciplines of both medicine and dentistry involved in the treatment of obstructive sleep apnea (OSA), several forms of therapy are available. The orthodontist is rarely considered when the diagnosis of chronic obstructive sleep apnea (OSA) is delivered. However, the scope of orthodontic care today is much broader than the mere alignment of teeth. While the current gold standard for OSA care remains continuous positive air pressure (CPAP), the patient may be given a prescription for an intra‐oral sleep appliance. When orthodontists work in concert with their medical colleagues to provide a sleep appliance, several considerations must be made including the evidence regarding oral appliance efficacy. For some patients, oral appliances are highly successful; however, even for responsive patients, there are risks associated with oral appliance therapy. The aim of the paper was to present a critical review of the current level of evidence for the use of oral appliances in the treatment of OSA. A substantial number of publications ranging from case reports, uncontrolled and controlled case series, prospective randomized studies, and even a small number of systematic reviews were available. The existing systematic reviews were based on either a limited number of prospective studies with limited numbers of patients or in some cases were based on subjective data only. As a result, a narrative review of the literature was performed that discusses objective clinically testable criteria and recent developments that may aid future research investigations.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/111150/1/ocr12071.pd
Assessment of Nurses’ Views and Current Practice of Trauma-Informed Pediatric Nursing Care: Oncology
Purpose: The purpose of this project is to: (i) assess and evaluate the awareness, knowledge and current practice trends of pediatric oncology nurses as they relate to pediatric trauma-informed care. Methods: A prospective, cross-sectional sample of convenience was used to assess pediatric nursing staff at the Kentucky Children’s Hospital. The survey used in this study was replicated from a previous study, “Nurses’ Views and Current Practice of Trauma-Informed Pediatric Nursing Care,” authored by Kassam-Adams et al., nurses and doctors affiliated with Children\u27s Hospital of Philadelphia, University of Pennsylvania, Penn State Hershey Children\u27s Hospital, Nemours Child Health System, Children\u27s Hospital of Pittsburgh, Geisinger Health System, and Lehigh Valley Health Network (2014). Results: Participants in this study demonstrated that they have an overall understanding of traumatic stress, and most actually utilize trauma-informed practices in their everyday routine. The nurses working in the oncology unit had favorable opinions about trauma-informed practices, and felt competent about the specific aspects assessed by the survey. Conclusion: Though Oncology was the focus for this study, all medical crises like illnesses/injuries can be the cause of a traumatic stress response. Therefore it is important as a provider to aim to reduce the severity of trauma related to all illnesses/injuries in all aspects of pediatric care. The next step would be to begin performing another brief study involving an educational intervention, and develop a committee to move forward with formal educational training, and the development and implementation of the DEF Protocol within the Kentucky Children’s Hospital
Alien Registration- Conley, William S. (Portland, Cumberland County)
https://digitalmaine.com/alien_docs/23893/thumbnail.jp
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Methane emissions from the 2015 Aliso Canyon blowout in Los Angeles, CA.
Single-point failures of natural gas infrastructure can hamper methane emission control strategies designed to mitigate climate change. The 23 October 2015 blowout of a well connected to the Aliso Canyon underground storage facility in California resulted in a massive release of natural gas. Analysis of methane and ethane data from dozens of plume transects, collected during 13 research-aircraft flights between 7 November 2015 and 13 February 2016, shows atmospheric leak rates of up to 60 metric tons of methane and 4.5 metric tons of ethane per hour. At its peak, this blowout effectively doubled the methane emission rate of the entire Los Angeles basin and, in total, released 97,100 metric tons of methane to the atmosphere
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