308 research outputs found
MOVIN: Real-time Motion Capture using a Single LiDAR
Recent advancements in technology have brought forth new forms of interactive
applications, such as the social metaverse, where end users interact with each
other through their virtual avatars. In such applications, precise full-body
tracking is essential for an immersive experience and a sense of embodiment
with the virtual avatar. However, current motion capture systems are not easily
accessible to end users due to their high cost, the requirement for special
skills to operate them, or the discomfort associated with wearable devices. In
this paper, we present MOVIN, the data-driven generative method for real-time
motion capture with global tracking, using a single LiDAR sensor. Our
autoregressive conditional variational autoencoder (CVAE) model learns the
distribution of pose variations conditioned on the given 3D point cloud from
LiDAR.As a central factor for high-accuracy motion capture, we propose a novel
feature encoder to learn the correlation between the historical 3D point cloud
data and global, local pose features, resulting in effective learning of the
pose prior. Global pose features include root translation, rotation, and foot
contacts, while local features comprise joint positions and rotations.
Subsequently, a pose generator takes into account the sampled latent variable
along with the features from the previous frame to generate a plausible current
pose. Our framework accurately predicts the performer's 3D global information
and local joint details while effectively considering temporally coherent
movements across frames. We demonstrate the effectiveness of our architecture
through quantitative and qualitative evaluations, comparing it against
state-of-the-art methods. Additionally, we implement a real-time application to
showcase our method in real-world scenarios. MOVIN dataset is available at
\url{https://movin3d.github.io/movin_pg2023/}
Concurrence of Stevens-Johnson Syndrome and Bilateral Parotitis after Minocycline Therapy
Minocycline is an antibiotic of tetracycline derivatives that is commonly used in the treatment of moderate to severe acne vulgaris. It has been reported to cause rare adverse events from mild cutaneous eruption to severe forms including drug-induced lupus, serum sickness-like reaction, and hypersensitivity reactions, etc. The risks of adverse events attributed to minocycline have not been ascertained reliably and there are concerns about the safety of minocycline which could possibly result in life-threatening events such as the Stevens-Johnson syndrome. Here we demonstrate an unusual case of Stevens-Johnson syndrome in conjunction with bilateral parotitis after the intake of minocycline in a Korean boy suggesting discreet use of the drug
Analysis of Long-Range Transport of Carbon Dioxide and Its High Concentration Events over East Asian Region Using GOSAT Data and GEOS-Chem Modeling
This study aims to evaluate the long-range transport of CO2 in East Asian region, using concentration data in a surface measurement site (Gosan Station), column averaged concentration data of satellite-borne instrument (GOSAT), and GEOS-Chem modeling results for the period of June 2009 to May 2011. We perform a validation of the data from GOSAT and GEOS-Chem with total column observations (TCCON). The analysis of the long-range transport and high concentration (HC) events using surface/satellite observations and modeling results is conducted. During the HC events, the concentrations in CO2 and other air pollutants such as SO2 and CO are higher than that of all episodes. It means that CO2, known as a globally well-mixed gas, may also act as a fingerprint of human activity with unique regional characteristics like other air pollutants. This comprehensive analysis, in particular with GOSAT CO2 observation data, shows that CO2 plume with high concentration can be long-range transported with 1-2 days' duration with regional scale. We can find out with GEOS-Chem tagging simulation that more than 45% of the elevated CO2 concentration over central/eastern China, Korea, and Japan on high concentration days can be explained by emission sources of East Asia mainland.open0
EFFECTS OF 10 WEEKS TRAINING PROGRAM ON LOWER EXTREMITY STRENGTH AND VERTICAL REACTION FORCE DURING SIT-TO-STAND IN CHRONIC STROKE PATIENTS
The purpose of this study was to investigate the effects of 10 weeks training program on lower extremity strength and' vertical reaction force during sit-to-stand movement in chronic stroke patients. Maximum vertical ground reaction force, difference of vertical ground reaction force between left and right foot, COP in anteriorposterior and mediolateral direction did not show any significant time main effect. However, the difference of body weight distribution between the left and right foot was decreased in experimental group after training. The peak torque generated by the flexors of the paretic limb at 60o /sec and 180o/sec in experimental group changed from baseline, an increases of 30.23% and 24.09%, respectively. These results appear that 10 weeks training program improves sit-to-stand movement and lower extremity strength in chronic stroke patients
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