1,268 research outputs found
Search for serendipitous TNO occultation in X-rays
To study the population properties of small, remote objects beyond Neptune's
orbit in the outer solar system, of kilometer size or smaller, serendipitous
occultation search is so far the only way. For hectometer-sized Trans-Neptunian
Objects (TNOs), optical shadows actually disappear because of diffraction.
Observations at shorter wave lengths are needed. Here we report the effort of
TNO occultation search in X-rays using RXTE/PCA data of Sco X-1 taken from June
2007 to October 2011. No definite TNO occultation events were found in the 334
ks data. We investigate the detection efficiency dependence on the TNO size to
better define the sensible size range of our approach and suggest upper limits
to the TNO size distribution in the size range from 30 m to 300 m. A list of
X-ray sources suitable for future larger facilities to observe is proposed.Comment: Accepted to publish in MNRA
RVSL: Robust Vehicle Similarity Learning in Real Hazy Scenes Based on Semi-supervised Learning
Recently, vehicle similarity learning, also called re-identification (ReID),
has attracted significant attention in computer vision. Several algorithms have
been developed and obtained considerable success. However, most existing
methods have unpleasant performance in the hazy scenario due to poor
visibility. Though some strategies are possible to resolve this problem, they
still have room to be improved due to the limited performance in real-world
scenarios and the lack of real-world clear ground truth. Thus, to resolve this
problem, inspired by CycleGAN, we construct a training paradigm called
\textbf{RVSL} which integrates ReID and domain transformation techniques. The
network is trained on semi-supervised fashion and does not require to employ
the ID labels and the corresponding clear ground truths to learn hazy vehicle
ReID mission in the real-world haze scenes. To further constrain the
unsupervised learning process effectively, several losses are developed.
Experimental results on synthetic and real-world datasets indicate that the
proposed method can achieve state-of-the-art performance on hazy vehicle ReID
problems. It is worth mentioning that although the proposed method is trained
without real-world label information, it can achieve competitive performance
compared to existing supervised methods trained on complete label information.Comment: Accepted by ECCV 202
Toward a Human-Centered AI-assisted Colonoscopy System
AI-assisted colonoscopy has received lots of attention in the last decade.
Several randomised clinical trials in the previous two years showed exciting
results of the improving detection rate of polyps. However, current commercial
AI-assisted colonoscopy systems focus on providing visual assistance for
detecting polyps during colonoscopy. There is a lack of understanding of the
needs of gastroenterologists and the usability issues of these systems. This
paper aims to introduce the recent development and deployment of commercial
AI-assisted colonoscopy systems to the HCI community, identify gaps between the
expectation of the clinicians and the capabilities of the commercial systems,
and highlight some unique challenges in Australia.Comment: 9 page
Catechins Blunt the Effects of oxLDL and its Primary Metabolite Phosphatidylcholine Hydroperoxide on Endothelial Dysfunction Through Inhibition of Oxidative Stress and Restoration of eNOS in Rats
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