3,185 research outputs found
Atomic Processes in Planetary Nebulae and H II Regions
Spectroscopic studies of Planetary Nebulae (PNe) and H {\sc ii} regions have
driven much development in atomic physics. In the last few years the
combination of a generation of powerful observatories, the development of ever
more sophisticated spectral modeling codes, and large efforts on mass
production of high quality atomic data have led to important progress in our
understanding of the atomic spectra of such astronomical objects. In this paper
I review such progress, including evaluations of atomic data by comparisons
with nebular spectra, detection of spectral lines from most iron-peak elements
and n-capture elements, observations of hyperfine emission lines and analysis
of isotopic abundances, fluorescent processes, and new techniques for
diagnosing physical conditions based on recombination spectra. The review is
directed toward atomic physicists and spectroscopists trying to establish the
current status of the atomic data and models and to know the main standing
issues.Comment: 9 pages, 1 figur
Superconducting niobium thin film slow-wave structures
A superconducting comb structure as a slow-wave element in a traveling-wave maser will significantly improve maser noise temperature and gain by reducing the insertion loss. The results of the insertion loss measurements of superconducting niobium slow-wave structures subjected to maser operating conditions at X-Band frequencies are presented
Barriers and facilitators to pharmacist prescriptive authority for naloxone.
Presented at: American Public Health Association 2016 Annual Meeting & Expo; October 29-November 2, 2016; Denver, CO.https://digitalrepository.unm.edu/prc-posters-presentations/1018/thumbnail.jp
Pharmacists Role in Preventive Healthcare Services Including Measures to Address Opiod Abuse Epidemic.
Accepted for presentation at: New Mexico Public Health Association Annual Conferencehttps://digitalrepository.unm.edu/prc-posters-presentations/1001/thumbnail.jp
Determining the Locations of Dust Sources in FeLoBAL Quasars
We conduct a spectroscopic search of quasars observed by the Sloan Digital
Sky Survey (SDSS) with broad absorption line (BAL) troughs due to Mg II and
troughs due to Fe II that simultaneously exhibit strong Balmer narrow emission
lines (NELs). We find that in a redshift range of 0.4 less than or equal to z
less than or equal to 0.9 approximately 23 of the 70 Mg II BALs and 4 of a
subset of 15 Fe II BALs exhibit strong Balmer emission. We also find
significant fractions of Mg II BALs (approximately 23%) and those Mg II BALs
with Fe II troughs (approximately 27%) have strong continuum reddening, E(B -
V) greater than or equal to 0.1. From measurements of the Balmer decrement in
three objects, we find similarly significant reddening of the NEL region in
three of the four objects; the NELs in the fourth object are not measurable. We
also include one object in this study not taken from the SDSS sample that shows
Fe II absorption and strong narrow emission, but due to measurement uncertainty
and low continuum reddening the comparison is consistent but inconclusive. We
find a trend in both the Mg II and Fe II BAL samples between the NEL reddening
and continuum reddening. Because the narrow line reddening is consistent with
the continuum reddening in every object in the two SDSS samples, it suggests
that the reddening sources in these objects likely exist at larger radial
distances than the narrow line regions from the central nucleus.Comment: 40 manuscript pages, accepted in ApJ (July
Changes produced in the intramuscular tissue via dry needling measured with magnetic resonance imaging
Abstract
Introduction Myofascial trigger points are a common cause of pain and clinically observed local muscle sensitivity. The improvement associated with the muscle relaxation effect (reduction of muscle rigidity) produced by dry needling (DN) is still not well known. Thus, it is thought that the regeneration of the tissue that has been destructed by dry needling via the inflammatory process occurs with the return to normal muscle contractility.
Aims The aim of this study was to identify whether the local inflammatory effect is immediately induced by DN, using magnetic resonance imaging (MRI).
Material and Methods 18 asymptomatic patients were evaluated, with latent trigger points in the medial gastrocnemius (MG). We used an intergroup research design to study differences in MRI signal in the medial gastrocnemius, before and after performing DN. The MG which presented the most pain in response to pressure, was used as the experimental or intervention group, whereas the contralateral MG was used as the control group. MRI was used with signal intensity (STIR), to identify signal changes due to local inflammation. An ANOVA test was performed to analyze the influence of DN in the STIR variable and a Student's t-test for dependent samples was used to compare the perception of pain after DN.
Results The STIR increased by 128.97% after DN in the experimental group. The effect of the interaction showed significant differences (F (1.34) = 235, p = 0.0001, r = 0.93). The Bonferroni post hoc tests showed significant differences [differences in means and 95% confidence interval (95%CI) = 198 (172 - 224)] signal intensity (F (1.34) = 236, p = 0.001; r = 0.93; d = 5.03). Furthermore, a significant group was found (control vs. experimental group) after controlling for the effects of the intervention (F (1.33) = 9.95, p = 0.003, r = 0.48, d = 1.10). Regarding the perception of pain in response to pressure, a significant reduction was found between the pre and post intervention measurements (t (17) = 12.40, p = 0.001, r = 0.65, d = 1.71). The Pearson's correlation coefficient did not display any correlation among any variable.
Conclusion Intramuscular edema appears immediately after (1h) the application of DN, which indicates an inflammatory process with an unexpected reduction in pain perception. Our results are in line with other findings in mice which display signs of an inflammatory response after DN. A limitation of this study was the lack of further MRI measurements to detect when the edema resolved
Chemical Abundances from the Continuum
The calculation of solar absolute fluxes in the near-UV is revisited,
discussing in some detail recent updates in theoretical calculations of
bound-free opacity from metals. Modest changes in the abundances of elements
such as Mg and the iron-peak elements have a significant impact on the
atmospheric structure, and therefore self-consistent calculations are
necessary. With small adjustments to the solar photospheric composition, we are
able to reproduce fairly well the observed solar fluxes between 200 and 270 nm,
and between 300 and 420 nm, but find too much absorption in the 270-290 nm
window. A comparison between our reference 1D model and a 3D time-dependent
hydrodynamical simulation indicates that the continuum flux is only weakly
sensitive to 3D effects, with corrections reaching <10% in the near-UV, and <2%
in the optical.Comment: 10 pages, 5 figures, to appear in the proceedings of the conference A
Stellar Journey, a symposium in celebration of Bengt Gustafsson's 65th
birthday, June 23-27, 2008, Uppsal
Comparison of engagement and emotional responses of older and younger adults interacting with 3D cultural heritage artefacts on personal devices
The availability of advanced software and less expensive hardware allows museums to preserve and share artefacts digitally. As a result, museums are frequently making their collections accessible online as interactive, 3D models. This could lead to the unique situation of viewing the digital artefact before the physical artefact. Experiencing artefacts digitally outside of the museum on personal devices may affect the user's ability to emotionally connect to the artefacts. This study examines how two target populations of young adults (18–21 years) and the elderly (65 years and older) responded to seeing cultural heritage artefacts in three different modalities: augmented reality on a tablet, 3D models on a laptop, and then physical artefacts. Specifically, the time spent, enjoyment, and emotional responses were analysed. Results revealed that regardless of age, the digital modalities were enjoyable and encouraged emotional responses. Seeing the physical artefacts after the digital ones did not lessen their enjoyment or emotions felt. These findings aim to provide an insight into the effectiveness of 3D artefacts viewed on personal devices and artefacts shown outside of the museum for encouraging emotional responses from older and younger people
N-methyl-N-((1-methyl-5-(3-(1-(2-methylbenzyl)piperidin-4-yl)propoxy)-1H-indol-2-yl)methyl)prop-2-yn-1-amine, a new cholinesterase and monoamine oxidase dual inhibitor
On the basis of N-((5-(3-(1-benzylpiperidin-4-yl)propoxy)-1-methyl-1H-indol-2-yl)methyl)-N-methylprop-2-yn-1-amine (II, ASS234) and QSAR predictions, in this work we have designed, synthesized, and evaluated a number of new indole derivatives from which we have identified N-methyl-N-((1-methyl-5-(3-(1-(2-methylbenzyl)piperidin-4-yl)propoxy)-1H-indol-2-yl)methyl)prop-2-yn-1-amine (2, MBA236) as a new cholinesterase and monoamine oxidase dual inhibitor.PostprintPostprintPeer reviewe
Particle production azimuthal asymmetries in a clustering of color sources model
The collective interactions of many partons in the first stage of the
collisions is the usual accepted explanation of the sizable elliptical flow.
The clustering of color sources provides a framework of partonic interactions.
In this scheme, we show a reasonable agreement with RHIC data for pT<1.5 GeV/c
in both the dependence of v2 transverse momentum and in the shape of the
nuclear modified factor on the azimuthal angle for different centralities. We
show the predictions at LHC energies for Pb-Pb. In the case of proton-proton
collisions a sizable v2 is obtained at this energy.Comment: To appear in Journal of Physics
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