243 research outputs found
Verification of {\Gamma} symmetry assignment for the top valence band of ZnO by magneto-optical studies of the free A exciton state
The circularly-polarized and angular-resolved magneto-photoluminescence
spectroscopy was carried out to study the free A exciton 1S state in wurtzite
ZnO at 5 K.Comment: 4 figures, 16 pages. arXiv admin note: substantial text overlap with
arXiv:0706.396
Role of salivary anti-SSA/B antibodies for diagnosing primary Sjögren’s syndrome
The diagnosis of primary Sjögren’s syndrome (pSS) is complex, and the saliva test is a potential method to improve the existing diagnostic criteria.
Objective: To estimate the diagnostic accuracy of salivary anti-SSA/B antibodies in primary Sjögren’s syndrome
(pSS), and to analyze their correlations with clinical and laboratory profiles.
Study Design: This study enrolled 100 pSS patients and 140 non-pSS controls, including 40 rheumatoid arthritis
(RA) patients, 40 systemic lupus erythematosus (SLE) patients, and 60 healthy controls. Unstimulated whole saliva and stimulated parotid saliva samples were collected from the subjects. Salivary anti-SSA/B antibodies were
measured using an enzyme-linked immunosorbent assay (ELISA). Clinical and laboratory data were retrieved
from the medical records.
Results: In the pSS group, the sensitivity of anti-SSA and anti-SSB antibodies in whole saliva was 49% and 29%,
respectively, and the specificity was 87.5% and 95%. The sensitivity of anti-SSA and anti-SSB antibodies in parotid saliva was 32% and 8%, respectively, and the specificity was 95.52% and 97.86%, respectively. In the pSS
group, the diagnostic accuracy of anti-SSA/B antibodies in whole saliva was significantly higher than in parotid
saliva (
p
<0.05), but was significantly lower than in serum (
p
<0.05). The salivary flow rate in the pSS group posi
-
tive for whole salivary anti-SSA was significantly lower than in the negative group (
p
<0.05). The prevalence of
rheumatoid factor and antinuclear factor were significantly higher in salivary SSB-positive pSS patients than in
SSB-negative patients (
p
<0.05).
Conclusions: Compared to parotid saliva, whole saliva is a more suitable diagnostic fluid. Using salivary anti-
SSA/B antibodies as a single test item is insufficient given the relatively low sensitivity. Further studies should investigate the possibility of combining tests for different salivary autoantibodies as a method for diagnosing pSS
TransFA: Transformer-based Representation for Face Attribute Evaluation
Face attribute evaluation plays an important role in video surveillance and
face analysis. Although methods based on convolution neural networks have made
great progress, they inevitably only deal with one local neighborhood with
convolutions at a time. Besides, existing methods mostly regard face attribute
evaluation as the individual multi-label classification task, ignoring the
inherent relationship between semantic attributes and face identity
information. In this paper, we propose a novel \textbf{trans}former-based
representation for \textbf{f}ace \textbf{a}ttribute evaluation method
(\textbf{TransFA}), which could effectively enhance the attribute
discriminative representation learning in the context of attention mechanism.
The multiple branches transformer is employed to explore the inter-correlation
between different attributes in similar semantic regions for attribute feature
learning. Specially, the hierarchical identity-constraint attribute loss is
designed to train the end-to-end architecture, which could further integrate
face identity discriminative information to boost performance. Experimental
results on multiple face attribute benchmarks demonstrate that the proposed
TransFA achieves superior performances compared with state-of-the-art methods
Linking Stoichiometric Homeostasis of Microorganisms with Soil Phosphorus Dynamics in Wetlands Subjected to Microcosm Warming
Soil biogeochemical processes and the ecological stability of wetland ecosystems under global warming scenarios have gained increasing attention worldwide. Changes in the capacity of microorganisms to maintain stoichiometric homeostasis, or relatively stable internal concentrations of elements, may serve as an indicator of alterations to soil biogeochemical processes and their associated ecological feedbacks. In this study, an outdoor computerized microcosm was set up to simulate a warmed (+5°C) climate scenario, using novel, minute-scale temperature manipulation technology. The principle of stoichiometric homeostasis was adopted to illustrate phosphorus (P) biogeochemical cycling coupled with carbon (C) dynamics within the soil-microorganism complex. We hypothesized that enhancing the flux of P from soil to water under warming scenarios is tightly coupled with a decrease in homeostatic regulation ability in wetland ecosystems. Results indicate that experimental warming impaired the ability of stoichiometric homeostasis (H) to regulate biogeochemical processes, enhancing the ecological role of wetland soil as an ecological source for both P and C. The potential P flux from soil to water ranged from 0.11 to 34.51 mg m−2 d−1 in the control and 0.07 to 61.26 mg m−2 d−1 in the warmed treatment. The synergistic function of C-P acquisition is an important mechanism underlying C∶P stoichiometric balance for soil microorganisms under warming. For both treatment groups, strongly significant (p<0.001) relationships fitting a negative allometric power model with a fractional exponent were found between n-HC∶P (the specialized homeostatic regulation ability as a ratio of soil highly labile organic carbon to dissolved reactive phosphorus in porewater) and potential P flux. Although many factors may affect soil P dynamics, the n-HC∶P term fundamentally reflects the stoichiometric balance or interactions between the energy landscape (i.e., C) and flow of resources (e.g., N and P), and can be a useful ecological tool for assessing potential P flux in ecosystems
Performance of the IMPACT and Helsinki models for predicting 6-month outcomes in a cohort of patients with traumatic brain injury undergoing cranial surgery
Peer reviewe
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