2,453 research outputs found
Reflexiones en torno a la formación de docentes de medicina
En el contexto de: los avances tecnológicos de los últimos 20 años, sumados al crecimiento demográfico, los cambios macroeconómicos a escala global, el aumento del papel protagónico de la mujer en el ámbito profesional, las realidades asistenciales de los nóveles médicos egresados, la labor asistencial de los docentes universitarios, los recursos necesarios para la educación en salud y las herramientas heterogéneas de las cuales disponen los ámbitos de formación en salud del país proponemos repensar ¿qué perfil docente en el ámbito de la salud necesitan nuestras casas de estudios universitarios? ¿cuáles son las competencias necesarias a adquirir y desarrollar por nuestros exigidos docentes universitarios actuales? Realizamos una revisión del significado en cuanto a competencias docentes, y aportes de diversos autores en este contexto. Proponemos la reflexión de este importante aspecto, explicitando finalmente ejes de acción y objetivos para un programa de formación docente continua en el ámbito de la salud
Spectroscopic determination of the s-wave scattering lengths of 86Sr and 88Sr
We report the use of photoassociative spectroscopy to determine the ground
state s-wave scattering lengths for the main bosonic isotopes of strontium,
86Sr and 88Sr. Photoassociative transitions are driven with a laser red-detuned
by up to 1400 GHz from the 1S0-1P1 atomic resonance at 461 nm. A minimum in the
transition amplitude for 86Sr at -494+/-5 GHz allows us to determine the
scattering lengths 610a0 < a86 < 2300a0 for 86Sr and a much smaller value of
-1a0 < a88 < 13a0 for 88Sr.Comment: 4 pages, 3 figures, submitted to Physical Review Letter
Electrochemotherapy Is Effective in the Treatment of Bone Metastases
Bone metastases induce pain, risk of fracture, and neural compression, and reduced mobility and quality of life. Electrochemotherapy (ECT) is a minimally invasive local treatment based on a high-voltage electric pulse combined with an anticancer drug. Preclinical and clinical studies have supported the use of ECT in patients with metastatic bone disease, demonstrating that it does not damage the mineral structure of the bone and its regenerative capacity, and that is feasible and efficient for the treatment of bone metastases. Since 2009, 88 patients with bone metastasis have received ECT at the Rizzoli Institute. 2014 saw the start of a registry of patients with bone metastases treated with ECT, whose data are recorded in a shared database. We share the Rizzoli Institute experience of 38 patients treated with ECT for a bone metastasis, excluding patients not included in the registry (before 2014) and those treated with bone fixation. Mean follow-up was 2 months (1–52). Response to treatment using RECIST criteria was 29% objective responses, 59% stable disease, and 16% progressive disease. Using PERCIST, the response was 36% OR, 14% SD, and 50% PD with no significant differences between the two criteria. A significant decrease in pain and better quality of life was observed at FU
Ultracold Neutral Plasmas
Ultracold neutral plasmas are formed by photoionizing laser-cooled atoms near
the ionization threshold. Through the application of atomic physics techniques
and diagnostics, these experiments stretch the boundaries of traditional
neutral plasma physics. The electron temperature in these plasmas ranges from
1-1000 K and the ion temperature is around 1 K. The density can approach
cm. Fundamental interest stems from the possibility of
creating strongly-coupled plasmas, but recombination, collective modes, and
thermalization in these systems have also been studied. Optical absorption
images of a strontium plasma, using the Sr
transition at 422 nm, depict the density profile of the plasma, and probe
kinetics on a 50 ns time-scale. The Doppler-broadened ion absorption spectrum
measures the ion velocity distribution, which gives an accurate measure of the
ion dynamics in the first microsecond after photoionization.Comment: 12th International Congress on Plasma Physics, 25-29 October 2004,
Nice (France
Absorption Imaging and Spectroscopy of Ultracold Neutral Plasmas
Absorption imaging and spectroscopy can probe the dynamics of an ultracold
neutral plasma during the first few microseconds after its creation.
Quantitative analysis of the data, however, is complicated by the inhomogeneous
density distribution, expansion of the plasma, and possible lack of global
thermal equilibrium for the ions. In this article we describe methods for
addressing these issues. Using simple assumptions about the underlying
temperature distribution and ion motion, the Doppler-broadened absorption
spectrum obtained from plasma images can be related to the average temperature
in the plasma.Comment: 14 pages, 8 figure
Mimicking multi-channel scattering with single-channel approaches
The collision of two atoms is an intrinsic multi-channel (MC) problem as
becomes especially obvious in the presence of Feshbach resonances. Due to its
complexity, however, single-channel (SC) approximations, which reproduce the
long-range behavior of the open channel, are often applied in calculations. In
this work the complete MC problem is solved numerically for the magnetic
Feshbach resonances (MFRs) in collisions between generic ultracold 6Li and 87Rb
atoms in the ground state and in the presence of a static magnetic field B. The
obtained MC solutions are used to test various existing as well as presently
developed SC approaches. It was found that many aspects even at short
internuclear distances are qualitatively well reflected. This can be used to
investigate molecular processes in the presence of an external trap or in
many-body systems that can be feasibly treated only within the framework of the
SC approximation. The applicability of various SC approximations is tested for
a transition to the absolute vibrational ground state around an MFR. The
conformance of the SC approaches is explained by the two-channel approximation
for the MFR.Comment: 15 pages, 10 figure
On spontaneous scalarization
We study in the physical frame the phenomenon of spontaneous scalarization
that occurs in scalar-tensor theories of gravity for compact objects. We
discuss the fact that the phenomenon occurs exactly in the regime where the
Newtonian analysis indicates it should not. Finally we discuss the way the
phenomenon depends on the equation of state used to describe the nuclear
matter.Comment: 41 pages, RevTex, 10 ps figures, submitted to Phys. Rev.
ERCP and splenic injury
Abstractendoscopic Retrograde Colangiopancreatography (eRCP) is an invasive procedure with important complications that occurs in 5%-10% of the cases. The most frequent procedure related complications are: acute pancreatitis, hemorrhage, perforation and infection. an infrequent but potentially life threatening eRCP complication is the splenic injury, with very few cases reported in the literature. We report a patient with cholecholithiasis and biliary pancreatitis who was diagnosed with a subcapsular splenic laceration a few hours after an eRCP. Clinicians should be alerted to this potential post-procedure complication associated with eRCP
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