118 research outputs found
Poly[[aqua(μ7-biphenyl-3,3′,4,4′-tetracarboxylato)(1,10-phenanthroline)dicobalt(II)] monohydrate]
In the title compound, {[Co2(C16H6O8)(C12H8N2)(H2O)2]·H2O}n, one CoII ion has a {CoN2O4} distorted octahedral environment defined by two N atoms of one 1,10-phenanthroline (phen) ligand, three O atoms of the carboxylate groups of three biphenyl-3,3′,4,4′-tetracarboxylate (BPTC) ligands, one of which is bidentate, and one O atom from one coordinated water molecule. The other CoII atom is surrounded by six O atoms from four different BPTC ligands and one coordinated water molecule. Each BPTC ligand forms eight coordination bonds with seven CoII atoms, leading to a layer structure along the ac plane. Uncoordinated water molecules occupy the space between the layers, and interact via interlayer O—H⋯O hydrogen bonds along the b axis, generating a three-dimensional supramolecular network
Social participation performance of wheelchair users using clustering and geolocational sensor's data
Moderate Nrf2 Activation by Genetic Disruption of Keap1 Has Sex-Specific Effects on Bone Mass in Mice
Keap1 is a negative controller of the transcription factor Nrf2 for its activity. The Keap1/Nrf2 signaling pathway has been considered as a master regulator of cytoprotective genes, and exists in many cell types including osteoblasts and osteoclasts. Our previous study shows Nrf2 deletion decreases bone formation. Recent studies show hyperactivation of Nrf2 causes osteopenia in Keap1−/− mice, and Keap1−/− osteoblasts have significantly less proliferative potential than Keap1+/− osteoblasts. We aimed to examine if moderate Nrf2 activation by disruption of Keap1 impacts bone metabolism. We examined bone phenotype of Keap1 heterozygotic mice (Ht) in comparison with Keap1 wild type (WT) mice. Deletion or knockdown of Keap1 enhanced the gene expression of Nrf2, ALP and wnt5a in cultured primary osteoblasts compared to WT control. In male mice, compared with their age-matched littermate WT controls, Keap1 Ht mice showed significant increase in bone formation rate (+30.7%, P = 0.0029), but did not change the ultimate force (P < 0.01). The osteoclast cell numbers (−32.45%, P = 0.01) and surface (−32.58%, P = 0.03) were significantly reduced by Keap1 deficiency in male mice. Compared to male WT mice, serum bone resorption marker in male Keap1 Ht mice was significantly decreased. Our data suggest that moderate Nrf2 activation by disruption of Keap1 improved bone mass by regulating bone remodeling in male mice
Fast capture of textured full-body avatar with RGB-D cameras
We present a practical system which can provide
a textured full-body avatar within three seconds. It uses sixteen
RGB-depth (RGB-D) cameras, ten of which are arranged
to capture the body, while six target the important
head region. The configuration of the multiple cameras is
formulated as a constraint-based minimum set space-covering
problem, which is approximately solved by a heuristic algorithm.
The camera layout determined can cover the fullbody
surface of an adult, with geometric errors of less than
5 mm. After arranging the cameras, they are calibrated using
a mannequin before scanning real humans. The 16 RGB-D
images are all captured within 1 s, which both avoids the
need for the subject to attempt to remain still for an uncomfortable
period, and helps to keep pose changes between different
cameras small. All scans are combined and processed
to reconstruct the photo-realistic textured mesh in 2 s. During
both system calibration and working capture of a real
subject, the high-quality RGB information is exploited to assist
geometric reconstruction and texture stitching optimization
DiQAD: A Benchmark Dataset for End-to-End Open-domain Dialogue Assessment
Dialogue assessment plays a critical role in the development of open-domain
dialogue systems. Existing work are uncapable of providing an end-to-end and
human-epistemic assessment dataset, while they only provide sub-metrics like
coherence or the dialogues are conversed between annotators far from real user
settings. In this paper, we release a large-scale dialogue quality assessment
dataset (DiQAD), for automatically assessing open-domain dialogue quality.
Specifically, we (1) establish the assessment criteria based on the dimensions
conforming to human judgements on dialogue qualities, and (2) annotate
large-scale dialogues that conversed between real users based on these
annotation criteria, which contains around 100,000 dialogues. We conduct
several experiments and report the performances of the baselines as the
benchmark on DiQAD. The dataset is openly accessible at
https://github.com/yukunZhao/Dataset_Dialogue_quality_evaluation.Comment: Accepted to Findings of EMNLP 202
Knowing What LLMs DO NOT Know: A Simple Yet Effective Self-Detection Method
Large Language Models (LLMs) have shown great potential in Natural Language
Processing (NLP) tasks. However, recent literature reveals that LLMs generate
nonfactual responses intermittently, which impedes the LLMs' reliability for
further utilization. In this paper, we propose a novel self-detection method to
detect which questions that a LLM does not know that are prone to generate
nonfactual results. Specifically, we first diversify the textual expressions
for a given question and collect the corresponding answers. Then we examine the
divergencies between the generated answers to identify the questions that the
model may generate falsehoods. All of the above steps can be accomplished by
prompting the LLMs themselves without referring to any other external
resources. We conduct comprehensive experiments and demonstrate the
effectiveness of our method on recently released LLMs, e.g., Vicuna, ChatGPT,
and GPT-4
Author Correction: Moderate Nrf2 Activation by Genetic Disruption of Keap1 Has Sex-Specific Effects on Bone Mass in Mice
Correction to: Scientific Reports https://doi.org/10.1038/s41598-019-57185-1, published online 15 January 202
SuperMatching: feature matching using supersymmetric geometric constraints
Feature matching is a challenging problem at the heart of numerous computer graphics and computer vision applications. We present the SuperMatching algorithm for finding correspondences between two sets of features. It does so by considering triples or higher order tuples of points, going beyond the pointwise and pairwise approaches typically used. SuperMatching is formulated using a supersymmetric tensor representing an affinity metric that takes into account feature similarity and geometric constraints between features: Feature matching is cast as a higher order graph matching problem. SuperMatching takes advantage of supersymmetry to devise an efficient sampling strategy to estimate the affinity tensor, as well as to store the estimated tensor compactly. Matching is performed by an efficient higher order power iteration approach that takes advantage of this compact representation. Experiments on both synthetic and real data show that SuperMatching provides more accurate feature matching than other state-of-the-art approaches for a wide range of 2D and 3D features, with competitive computational cost
Elevated Expression of MAPK Phosphatase 3 in Breast Tumors—A Mechanism of Tamoxifen Resistance
Antiestrogen resistance is a major clinical problem in the treatment of breast cancer. Altered growth factor signaling with estrogen receptor (ER) α has been shown to be associated with the development of resistance. Gene expression profiling was utilized to identify MAPK phosphatase 3 (MKP3) whose expression was correlated with response to the antiestrogen tamoxifen in both patients and in vitro derived cell line models. Overexpression of MKP3 rendered ERα-positive breast cancer cells resistant to the growth inhibitory effects of tamoxifen, and enhanced tamoxifen agonist activity in endometrial cells. MKP3 overexpression was associated with lower levels of activated ERK1,2 phosphorylation in the presence of estrogen, but that estrogen deprivation and tamoxifen treatment decreased MKP3 phosphatase activity, leading to an up-regulation of pERK1,2 MAPK, phosphoserine 118 of ERα, and cyclin D1. The MEK inhibitor PD98059 blocked tamoxifen-resistant growth. Accumulation of reactive oxygen species was observed with tamoxifen treatment of MKP3 overexpressing cells, and antioxidant treatment increased MKP3 phosphatase activity, thereby blocking resistance. Furthermore, PD98059 increased the levels of phospho-JNK in tamoxifen-treated MKP3 overexpressing cells, suggesting an interaction between MKP3 levels, activation of ERK1,2 MAPK, and JNK signaling in human breast cancer cells. MKP3 represents a novel mechanism of resistance which may be a potential biomarker for the use of ERK1,2 and/or JNK inhibitors in combination with tamoxifen treatment
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