1,068 research outputs found
Poly[diaqua-μ4-biphenyl-4,4′-dicarboxylato-magnesium(II)]
The solvothermal reaction of magnesium nitrate with biphenyl-4,4′-dicarboxylic acid in N,N-dimethylformamide and water leads to the formation of crystals of the title complex, [Mg(C14H8O4)(H2O)2]n. In the crystal structure, the Mg cations are coordinated by six O atoms from two water molecules and four symmetry-related biphenyl-4,4′-dicarboxylate anions within slightly distorted octahedra. The Mg cations are located on a center of inversion, the biphenyl-4,4′-dicarboxylate anions around a twofold rotation axis and the water molecule in a general position. The Mg cations are linked by the anions into a three-dimensional framework
Transformer-based Image Compression with Variable Image Quality Objectives
This paper presents a Transformer-based image compression system that allows
for a variable image quality objective according to the user's preference.
Optimizing a learned codec for different quality objectives leads to
reconstructed images with varying visual characteristics. Our method provides
the user with the flexibility to choose a trade-off between two image quality
objectives using a single, shared model. Motivated by the success of
prompt-tuning techniques, we introduce prompt tokens to condition our
Transformer-based autoencoder. These prompt tokens are generated adaptively
based on the user's preference and input image through learning a prompt
generation network. Extensive experiments on commonly used quality metrics
demonstrate the effectiveness of our method in adapting the encoding and/or
decoding processes to a variable quality objective. While offering the
additional flexibility, our proposed method performs comparably to the
single-objective methods in terms of rate-distortion performance
BANet: Blur-aware Attention Networks for Dynamic Scene Deblurring
Image motion blur usually results from moving objects or camera shakes. Such
blur is generally directional and non-uniform. Previous research efforts
attempt to solve non-uniform blur by using self-recurrent multi-scale or
multi-patch architectures accompanying with self-attention. However, using
self-recurrent frameworks typically leads to a longer inference time, while
inter-pixel or inter-channel self-attention may cause excessive memory usage.
This paper proposes blur-aware attention networks (BANet) that accomplish
accurate and efficient deblurring via a single forward pass. Our BANet utilizes
region-based self-attention with multi-kernel strip pooling to disentangle blur
patterns of different degrees and with cascaded parallel dilated convolution to
aggregate multi-scale content features. Extensive experimental results on the
GoPro and HIDE benchmarks demonstrate that the proposed BANet performs
favorably against the state-of-the-art in blurred image restoration and can
provide deblurred results in real-time
Transformer-based Variable-rate Image Compression with Region-of-interest Control
This paper proposes a transformer-based learned image compression system. It
is capable of achieving variable-rate compression with a single model while
supporting the region-of-interest (ROI) functionality. Inspired by prompt
tuning, we introduce prompt generation networks to condition the
transformer-based autoencoder of compression. Our prompt generation networks
generate content-adaptive tokens according to the input image, an ROI mask, and
a rate parameter. The separation of the ROI mask and the rate parameter allows
an intuitive way to achieve variable-rate and ROI coding simultaneously.
Extensive experiments validate the effectiveness of our proposed method and
confirm its superiority over the other competing methods.Comment: Accepted to IEEE ICIP 202
Pion PDFs confronted by Fixed-Target Charmonium Production
The pion, as the Goldstone boson of the strong interaction, is the lightest
QCD bound state and responsible for the long-range nucleon-nucleon interaction
inside the nucleus. Our knowledge on the pion partonic structure is limited by
the existing Drell-Yan data which are primarily sensitive to the pion
valence-quark distributions. The recent progress of global analysis of pion's
parton distribution functions (PDFs) utilizing various experimental approaches
are introduced. From comparisons between the pion-induced and
production data with theoretical calculations using the CEM and
NRQCD models, we show how these charmonium production data could provide useful
constraints on the pion PDFs.Comment: 17 pages, 6 figures; invited review. arXiv admin note: text overlap
with arXiv:2006.06947, arXiv:2209.0407
Effect of two low doses of prostaglandin F<sub>2α</sub> on luteolysis in dairy cows
In this preliminary study, we determined the effect of a modified method involving the administration of two low doses of prostaglandin F2α (PGF2α) at an interval of 24 h on luteolysis in dairy cows, and compared it with the standard single-dose method. Twenty-six cows were assigned to three groups treated with two low doses (TLD group, n = 10), one standard dose (SD group, n = 10), and one low dose (OLD group, n = 6) on day 9 to 10 of the oestrous cycle (day 0 = the day of PGF2α administration). Their serum progesterone (P4) levels and corpus luteum (CL) sizes were measured daily from day 0 to 4 to assess CL regression. The results indicated that the proportion of complete luteolysis, indicating a P4 value ≤ 1 ng/mL on day 3, was higher in the TLD group (100.0%) than in the SD (60.0%) and OLD (66.7%) groups. Ultrasonically detected changes in the CL area correlated with the shifts in the P4 values in both the TLD and the SD groups. The remaining CL area was significantly smaller in the TLD group (17.8% ± 3.3%) than in the SD or OLD group on day 4. Thus, we concluded that the proportion of luteolysis in cows was increased with two low doses of PGF2α as compared to a single PGF2α dose, indicating the necessity of the second dose of PGF2α. However, further studies with larger sample sizes in the field are required
TransTIC: Transferring Transformer-based Image Compression from Human Visualization to Machine Perception
This work aims for transferring a Transformer-based image compression codec
from human vision to machine perception without fine-tuning the codec. We
propose a transferable Transformer-based image compression framework, termed
TransTIC. Inspired by visual prompt tuning, we propose an instance-specific
prompt generator to inject instance-specific prompts to the encoder and
task-specific prompts to the decoder. Extensive experiments show that our
proposed method is capable of transferring the codec to various machine tasks
and outshining the competing methods significantly. To our best knowledge, this
work is the first attempt to utilize prompting on the low-level image
compression task
Induction of Antinuclear Antibodies by De Novo Autoimmune Hepatitis Regulates Alloimmune Responses in Rat Liver Transplantation
Concanavalin A (Con A) is a lectin originating from the jack-bean and well known for its ability to stimulate T cells and induce autoimmune hepatitis. We previously demonstrated the induction of immunosuppressive antinuclear autoantibody in the course of Con A-induced transient autoimmune hepatitis. This study aimed to clarify the effects of Con A-induced hepatitis on liver allograft rejection and acceptance. In this study, we observed the unique phenomenon that the induction of transient de novo autoimmune hepatitis by Con A injection paradoxically overcomes the rejection without any immunosuppressive drug and exhibits significantly prolonged survival after orthotopic liver transplantation (OLT). Significantly increased titers of anti-nuclear Abs against histone H1 and high-mobility group box 1 (HMGB1) and reduced donor specific alloantibody response were observed in Con A-injected recipients. Induction of Foxp3 and IL-10 in OLT livers of Con A-injected recipients suggested the involvement of regulatory T cells in this unique phenomenon. Our present data suggest the significance of autoimmune responses against nuclear histone H1 and HMGB1 for competing allogeneic immune responses, resulting in the acceptance of liver allografts in experimental liver transplantation
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