11 research outputs found
Text/Speech-Driven Full-Body Animation
Due to the increasing demand in films and games, synthesizing 3D avatar
animation has attracted much attention recently. In this work, we present a
production-ready text/speech-driven full-body animation synthesis system. Given
the text and corresponding speech, our system synthesizes face and body
animations simultaneously, which are then skinned and rendered to obtain a
video stream output. We adopt a learning-based approach for synthesizing facial
animation and a graph-based approach to animate the body, which generates
high-quality avatar animation efficiently and robustly. Our results demonstrate
the generated avatar animations are realistic, diverse and highly
text/speech-correlated.Comment: IJCAI-2022 demo track, video see https://youtu.be/MipiwU3Em_
Atomic Co/Ni dual sites and Co/Ni alloy nanoparticles in N-doped porous Janus-like carbon frameworks for bifunctional oxygen electrocatalysis
Single-atom electrocatalysts have attracted board interest in the recent years as they combine the advantages of heterogeneous and homogeneous electrocatalysts. Nevertheless, single-atom electrocatalysts with single metal component cannot further satisfy the demand of catalytic properties. This work developed atomic Co/Ni dual sites in N-doped porous carbon Janus-like frameworks through epitaxial growth of cobalt based MOFs on nickel complexes. Structural characterization and atomic-scale transmission electron microscopy revealed the homogeneously dispersed active sites of Co-Ni alloy and single Co/Ni atoms. Electrochemical data strongly demonstrated the advantages of integrating Co-MOF and Ni complex with different topological structures to form a Janus-like structure. The resultant catalysts afforded onset potential of 0.93 V and half-wave potential of 0.84 V for oxygen reduction reaction in alkaline media, and 0.86 V and 0.73 V in acid media, which is better than single noble-metal-free catalysts, even close to commercial Pt/C. Besides, the catalysts also exhibited good oxygen evolution reaction performance (a current density of 10 mA cm(-2) at a potential of 1.59 V) and overvoltage between ORR and OER is 0.78 V. Density functional theory calculations indicated the high electrocatalytic activities are originated from the synergetic effect of atomic Co/Ni-N-C bonds and microstructure of the prepared materials. This work paves a new avenue for the development of multiatomic electrocatalysts for energy conversion.</p
Strong Near-Infrared Absorbing and Biocompatible CuS Nanoparticles for Rapid and Efficient Photothermal Ablation of Gram-Positive and -Negative Bacteria
<i>Staphylococcus aureus</i> (<i>S. aureus</i>) and <i>Escherichia coli</i> (<i>E. coli)</i> are the most
common infectious bacteria in our daily life, and seriously affect
human’s health. Because of the frequent and extensive use of
antibiotics, the microbial strains forming drug resistance have become
more and more difficult to deal with. Herein, we utilized bovine serum
albumin (BSA) as the template to synthesize uniform copper sulfide
(CuS) nanoparticles via a biomineralization method. The as-prepared
BSA-CuS nanocomposites showed good biocompatibility and strong near-infrared
absorbance performance and can be used as an efficient photothermal
conversion agent for pathogenic bacteria ablation with a 980 nm laser
at a low power density of 1.59 W/cm<sup>2</sup>. The cytotoxicity
of BSA-CuS nanocomposite was investigated using skin fibroblast cells
and displayed good biocompatibility. Furthermore, the antibacterial
tests indicated that BSA-CuS nanocomposite showed no antibacterial
activity without NIR irradiation. In contrast, they demonstrated satisfying
killing bacterial ability in the presence of NIR irradiation. Interestingly, <i>S. aureus</i> and <i>E. coli</i> showed various antibacterial
mechanisms, possibly because of the different architectures of bacterial
walls. Considering the low cost, easy preparation, excellent biocompatibility
and strong photothermal convention efficiency (24.68%), the BSA-CuS
nanocomposites combined with NIR irradiation will shed bright light
on the treatment of antibiotic-resistant pathogenic bacteria