21,023 research outputs found
Holographic Schwinger effect with a moving D3-brane
We study the Schwinger effect with a moving D3-brane in a =4 SYM
plasma with the aid of AdS/CFT correspondence. We discuss the test particle
pair moving transverse and parallel to the plasma wind respectively. It is
found that for both cases the presence of velocity tends to increase the
Schwinger effect. In addition, the velocity has a stronger influence on the
Schwinger effect when the pair moves transverse to the plasma wind rather than
parallel.Comment: 8 pages, 6 figure
Entropic destruction of heavy quarkonium from a deformed model
In this paper, we study the destruction of heavy quarkonium due to the
entropic force in a deformed model. The effects of the deformation
parameter on the inter-distance and the entropic force are investigated. The
influence of the deformation parameter on the quarkonium dissociation is
analyzed. It is shown that the inter-distance increases in the presence of the
deformation parameter. In addition, the deformation parameter has the effect of
decreasing the entropic force. This results imply that the quarkonium
dissociates harder in a deformed AdS background than that in an usual AdS
background, in agreement with earlier findings.Comment: 6 pages, 2 figures. Accepted by Advances in High Energy Physic
Acute aortic dissection: An update
AbstractThe aorta, which has a complex intrinsic biology and sophisticated mechanical properties for conducting the blood ejected from the left ventricle to the rest of the systemic arterial bed, is the largest and strongest artery in the body. It carries roughly 200 million liters of blood in an average lifetime. Any process that undermines the architecture threatens the structure, stability, and functionality of the aorta. In this regard, acute aortic dissection (AAD) requires special attention because it is the most catastrophic acute illness of the aorta; it has high morbidity and mortality because of potentially fatal complications. AAD has, therefore, become an important topic of recent research, and knowledge about this disease has improved during the past few years. Up-to-date knowledge about the natural history, epidemiology, presentation, physiopathology, evolution, management, follow-up, and long-term outcomes of AAD are summarized in this review
Detach and Adapt: Learning Cross-Domain Disentangled Deep Representation
While representation learning aims to derive interpretable features for
describing visual data, representation disentanglement further results in such
features so that particular image attributes can be identified and manipulated.
However, one cannot easily address this task without observing ground truth
annotation for the training data. To address this problem, we propose a novel
deep learning model of Cross-Domain Representation Disentangler (CDRD). By
observing fully annotated source-domain data and unlabeled target-domain data
of interest, our model bridges the information across data domains and
transfers the attribute information accordingly. Thus, cross-domain joint
feature disentanglement and adaptation can be jointly performed. In the
experiments, we provide qualitative results to verify our disentanglement
capability. Moreover, we further confirm that our model can be applied for
solving classification tasks of unsupervised domain adaptation, and performs
favorably against state-of-the-art image disentanglement and translation
methods.Comment: CVPR 2018 Spotligh
Drag force and heavy quark potential in a rotating background
We explored the gravity dual of the rotating quark-gluon plasma by
transforming the boundary coordinates of the Schwarzschild- metric. The
Euler-Lagrange equation of the Nambu-Goto action and its solution become more
complex than those without rotation. For small angular velocity, we obtained an
analytical form of the drag force acting on a quark moving in the direction of
the rotation axis and found it stronger than that without rotation. We also
calculated the heavy quark potential under the same approximation. For the
quarkonium symmetric with respect to the rotation axis, the depth of the
potential is reduced by the rotation. For the quarkonium oriented in parallel
to the rotation axis, the bind force is weakened and the force range becomes
longer. We also compared our holographic formulation with others in the
literature.Comment: 28 pages, 3 figure
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