33,216 research outputs found
Transverse Dynamics at RHIC
Studies of , transverse momentum spectra and anisotropy flow from
nuclear collisions at RHIC indicate early thermalization and strong collective
expansion. We propose a systematic study of the anisotropy parameter and
the transverse momentum distributions of and in order to extract information on partonic collective flow.Comment: 4 pages, 3 figures; presented at Quark Matter 2002, Nantes, France,
July 18-24, 2002. Proceedings to be published in Nucl. Phys.
Trigonometric Parallaxes of Massive Star Forming Regions: III. G59.7+0.1 and W 51 IRS2
We report trigonometric parallaxes for G59.7+0.1 and W 51 IRS2, corresponding
to distances of 2.16^{+0.10}_{-0.09} kpc and 5.1^{+2.9}_{-1.4} kpc,
respectively. The distance to G59.7+0.1 is smaller than its near kinematic
distance and places it between the Carina-Sagittarius and Perseus spiral arms,
probably in the Local (Orion) spur. The distance to W 51 IRS2, while subject to
significant uncertainty, is close to its kinematic distance and places it near
the tangent point of the Carina-Sagittarius arm. It also agrees well with a
recent estimate based on O-type star spectro/photometry. Combining the
distances and proper motions with observed radial velocities gives the full
space motions of the star forming regions. We find modest deviations of 5 to 10
km/s from circular Galactic orbits for these sources, both counter to Galactic
rotation and toward the Galactic center.Comment: 16 pages, 6 figures; to appear in the Astrophysical Journa
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Early removal of senescent cells protects retinal ganglion cells loss in experimental ocular hypertension.
Experimental ocular hypertension induces senescence of retinal ganglion cells (RGCs) that mimics events occurring in human glaucoma. Senescence-related chromatin remodeling leads to profound transcriptional changes including the upregulation of a subset of genes that encode multiple proteins collectively referred to as the senescence-associated secretory phenotype (SASP). Emerging evidence suggests that the presence of these proinflammatory and matrix-degrading molecules has deleterious effects in a variety of tissues. In the current study, we demonstrated in a transgenic mouse model that early removal of senescent cells induced upon elevated intraocular pressure (IOP) protects unaffected RGCs from senescence and apoptosis. Visual evoked potential (VEP) analysis demonstrated that remaining RGCs are functional and that the treatment protected visual functions. Finally, removal of endogenous senescent retinal cells after IOP elevation by a treatment with senolytic drug dasatinib prevented loss of retinal functions and cellular structure. Senolytic drugs may have the potential to mitigate the deleterious impact of elevated IOP on RGC survival in glaucoma and other optic neuropathies
Bridging Parametric and Nonparametric Methods in Cognitive Diagnosis
A number of parametric and nonparametric methods for estimating cognitive
diagnosis models (CDMs) have been developed and applied in a wide range of
contexts. However, in the literature, a wide chasm exists between these two
families of methods, and their relationship to each other is not well
understood. In this paper, we propose a unified estimation framework to bridge
the divide between parametric and nonparametric methods in cognitive diagnosis
to better understand their relationship. We also develop iterative joint
estimation algorithms and establish consistency properties within the proposed
framework. Lastly, we present comprehensive simulation results to compare
different methods, and provide practical recommendations on the appropriate use
of the proposed framework in various CDM contexts
Competing orders in PZN-xPT and PMN-xPT relaxor ferroelectrics
Neutron and x-ray scattering studies on relaxor ferroelectric systems
Pb(ZnNb)O (PZN), Pb(MgNb)O (PMN), and
their solid solutions with PbTiO (PT) have shown that inhomogeneities and
disorder play important roles in the materials properties. Although a
long-range polar order can be established at low temperature - sometimes with
the help of an external electric field; short-range local structures called the
``polar nano-regions'' (PNR) still persist. Both the bulk structure and the PNR
have been studied in details. The coexistence and competition of long- and
short-range polar orders and how they affect the structural and dynamical
properties of relaxor materials are discussed.Comment: Article submitted for JPSJ Special Topics (Novel States of Matter
Induced by Frustration
A Neutron Elastic Diffuse Scattering Study of PMN
We have performed elastic diffuse neutron scattering studies on the relaxor
Pb(MgNb)O (PMN). The measured intensity distribution near a
(100) Bragg peak in the (hk0) scattering plane assumes the shape of a butterfly
with extended intensity in the (110) and (10) directions. The
temperature dependence of the diffuse scattering shows that both the size of
the polar nanoregions (PNR) and the integrated diffuse intensity increase with
cooling even for temperatures below the Curie temperature K.Comment: Submitted to PR
PGI9 ECONOMIC ANALYSIS OF THE POTENTIAL USAGES OF ALVIMOPAN AND METHYLNALTREXONE AT A TERTIARY CANCER CENTER
PATMAT: Person Aware Tuning of Mask-Aware Transformer for Face Inpainting
Generative models such as StyleGAN2 and Stable Diffusion have achieved
state-of-the-art performance in computer vision tasks such as image synthesis,
inpainting, and de-noising. However, current generative models for face
inpainting often fail to preserve fine facial details and the identity of the
person, despite creating aesthetically convincing image structures and
textures. In this work, we propose Person Aware Tuning (PAT) of Mask-Aware
Transformer (MAT) for face inpainting, which addresses this issue. Our proposed
method, PATMAT, effectively preserves identity by incorporating reference
images of a subject and fine-tuning a MAT architecture trained on faces. By
using ~40 reference images, PATMAT creates anchor points in MAT's style module,
and tunes the model using the fixed anchors to adapt the model to a new face
identity. Moreover, PATMAT's use of multiple images per anchor during training
allows the model to use fewer reference images than competing methods. We
demonstrate that PATMAT outperforms state-of-the-art models in terms of image
quality, the preservation of person-specific details, and the identity of the
subject. Our results suggest that PATMAT can be a promising approach for
improving the quality of personalized face inpainting
Disappearance of Transverse Flow in Central Collisions for Heavier Nuclei
For the first time, mass dependence of balance energy only for heavier
systems has been studied. Our results are in excellent agreement with the data
which allow us to predict the balance energy of U+U, for the first time, around
37-39 MeV/nucleon. Also our results indicate a hard equation of state along
with nucleon-nucleon cross-section around 40 mb.Comment: 4 pages, 3 figures, submitted to Phys. Rev. Let
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