3,022 research outputs found
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Jaw Tremor Resulting in Broken Teeth: On the Essential Tremor Spectrum
Background: Jaw tremors in essential tremor (ET) rarely represent anything other than a cosmetic concern.
Phenomenology Shown: A case of an ET patient whose jaw tremor was severe enough to result in cracked teeth.
Educational Value: It behooves treating clinicians to be aware of the full spectrum of this movement disorder
Recommended from our members
Jaw Tremor Resulting in Broken Teeth: On the Essential Tremor Spectrum
Background: Jaw tremors in essential tremor (ET) rarely represent anything other than a cosmetic concern.
Phenomenology Shown: A case of an ET patient whose jaw tremor was severe enough to result in cracked teeth.
Educational Value: It behooves treating clinicians to be aware of the full spectrum of this movement disorder
Evaluation of the Wellspring Model for Improving Nursing Home Quality
Examines how successfully the Wellspring model improved the quality of care for residents of eleven nonprofit nursing homes in Wisconsin. Looks at staff turnover, and evaluates the impact on facilities, employees, residents, and cost
Spectropolarimetric measurements of hidden broad lines in nearby megamaser galaxies: a lack of clear evidence for a correlation between black hole masses and virial products
High-accuracy black hole (BH) masses require excellent spatial resolution
that is only achievable for galaxies within ~100 Mpc using present-day
technology. At larger distances, BH masses are often estimated with
single-epoch scaling relations for active galactic nuclei. This method requires
only luminosity and the velocity dispersion of the broad line region (BLR) to
calculate a virial product, and an additional virial factor, , to determine
BH mass. The accuracy of these single-epoch masses, however, is unknown, and
there are few empirical constraints on the variance of between objects. We
attempt to calibrate single-epoch BH masses using spectropolarimetric
measurements of nine megamaser galaxies from which we measure the velocity
distribution of the BLR. We do not find strong evidence for a correlation
between the virial products used for single-epoch masses and dynamical mass,
both for the megamaser sample alone and when combined with dynamical masses
from reverberation mapping modeling. Furthermore, we find evidence that the
virial parameter varies between objects, but we do not find strong evidence
for a correlation with other observable parameters such as luminosity or broad
line width. Although we cannot definitively rule out the existence of any
correlation between dynamical mass and virial product, we find tension between
allowed values for masers and those widely used in the literature. We
conclude that the single-epoch method requires further investigation if it is
to be used successfully to infer BH masses.Comment: 27 pages, 16 figures, resubmitted to ApJ after incorporating
reviewer's comments. Corrected Figure 8, main results do not chang
An integrated approach for treatment of acute type a aortic dissection
Background and objective: We reviewed a single-institution experience to verify the impact of surgery during different time intervals on early and late results in the treatment of patients with type A acute aortic dissection (A-AAD). Materials and Methods: From 2004 to 2021, a total of 258 patients underwent repair of A-AAD; patients were equally distributed among three periods: 2004–2010 (Era 1, n = 90), 2011–2016 (Era 2, n = 87), and 2017–2021 (Era 3, n = 81). The primary end-point was to assess whether through the years changes in indications, surgical strategies and techniques and increasing experience have influenced early and late outcomes of A-AAD repair. Results: Axillary artery cannulation was almost routinely used in Eras 2 (86%) and 3 (91%) while one femoral artery was mainly cannulated in Era 1 (91%) (p < 0.01). Retrograde cerebral perfusion was predominantly used in Era 1 (60%) while antegrade cerebral perfusion was preferred in Eras 2 (94%,) and 3 (100%); (p < 0.01). There was a significant increase of arch replacement procedures from Era 1 (11%) to Eras 2 (33%) and 3 (48%) (p < 0.01). A frozen elephant trunk was mainly performed in Era 3. Hospital mortality was 13% in Era 1, 11% in Era 2, and 4% in Era 3 (p = 0.07). Actuarial survival at 3 years is 74%, in Era 1, 78% in Era 2, and 89% in Era 3 (p = 0.05). Conclusions: With increasing experience and a more aggressive approach, including total arch replacement, repair of A-AAD can be performed with low operative mortality in many patients. Patient care and treatment by a specific team organization allows a faster diagnosis and referral for surgery allowing to further improve early and late outcomes
The role of angular momentum in the construction of electromagnetic multipolar fields
Multipolar solutions of Maxwell's equations are used in many practical
applications and are essential for the understanding of light-matter
interactions at the fundamental level. Unlike the set of plane wave solutions
of electromagnetic fields, the multipolar solutions do not share a standard
derivation or notation. As a result, expressions originating from different
derivations can be difficult to compare. Some of the derivations of the
multipolar solutions do not explicitly show their relation to the angular
momentum operators, thus hiding important properties of these solutions. In
this article, the relation between two of the most common derivations of this
set of solutions is explicitly shown and their relation to the angular momentum
operators is exposed.Comment: 13 pages, 2 figure
Evaluación de la producción de carne de ganado criollo patagónico
Objetivo. Evaluar la producción de carne del ganado Criollo Patagónico respecto al Angus y cruzas entre ambas razas. Materiales y métodos. Se dispuso de una muestra de 42 animales de los genotipos Criollo Patagónico, Angus y cruza entre ambos, clasificados en novillitos o vaquillonas, terminados en feed lot durante un período de 114 y 156 días, a partir de los cuales se conformaron ocho grupos de análisis desbalanceados. Para la parte exploratoria se empleó análisis factorial. Se usaron modelos lineales mixtos para contemplar las correlaciones entre las mediciones sobre un mismo animal. Resultados. Se pudo constatar diferencias entre las medias de los pesos a faena de los dos períodos de engorde y que esta ganancia de peso se depositó en los cortes de menor valor comercial. Con relación al rendimiento de los cortes de alto valor económico, se detectó interacción entre éstos y los grupos, identificándose diferencias entre grupos para algunos de los cortes. Conclusiones. En virtud de los resultados obtenidos, se considera promisoria la producción de carne del ganado Criollo Patagónico con relación al rendimiento de los cortes de alto valor económico, pues sus rendimientos medios sólo se vieron superados en bife ancho por su cruza con Angus
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