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Uterine rupture is a rupture of the body or lower part of the uterus during pregnancy or delivery. Total of 98 cases with incomplete uterine rupture were classified as the incomplete uterine rupture group, 100 cases with a history of cesarean delivery without uterine rupture were classified as the non-ruptured uterus group, and controls were selected using a systematic sampling method. The maternal age ≥35 years were associated with 2.18 times higher odds of having an incomplete uterine rupture. The odd of having an incomplete uterine rupture was 3.744 times higher for a woman with delivery interval ≤36 months. Having pregnancy complication was associated with 3.961 times higher odds of having an incomplete uterine rupture. The neonatal weight was lighter in the incomplete uterine rupture group (P = 0.007). The number of preterm birth and transfer to the NICU were higher in the incomplete uterine rupture group (P ＜ 0.01). The operation time and the length of time in hospital were longer in the group with incomplete uterine rupture (P ＜ 0.01). Age ≥35 years, delivery interval ≤36 month, and pregnancy with complication were independent risk factors of incomplete rupture of the uterus secondary to previous cesarean section.

Thoracic ossification of the ligamentum flavum (TOLF) is characterized by ectopic ossification of the ligamentum flavum in the thoracic spine and is considered the main cause of thoracic spinal stenosis and spinal cord disease. Osteoblast specific transcription factor Osterix (Osx) is required for bone formation, and there is no bone formation or ossification without Osx. Surgical intervention is recognized as the only effective method for TOLF treatment with set of complications. However, underlying mechanisms of TOLF are not well understood. This paper summarizes the pathogenesis of TOLF. Some relevant factors have been discussed, such as mechanical stress, genetic susceptibility genes, endocrine and trace element metabolism abnormalities, which may associate with TOLF. More recent studies using proteomics technology and RNA sequencing approach have discovered that some new factors participate in TOLF by upregulation of Osx gene expression including inflammatory factors. TOLF is a unique disease involving multiple factors. On the other hand, studies on TOLF pathogenic mechanism may provide new ideas for finding possible upstream regulatory factors of Osx and further developing novel drugs to stimulate new bone formation to treat osteoporosis. [ABSTRACT FROM AUTHOR]

In opportunistic network, the regular connectivity of nodes and their individual conditions significantly influence message transmission. To address this, we propose an improved spray and wait routing algorithm based on stable transmission capacity evaluation of nodes (referred to as STCESW), which is derived from traditional Prophet and spray and wait algorithms but surpasses them. STCESW incorporates network models that consider node connection stability and transmission capacity, aiming to enhance the update and punishment formulas for node delivery probability. Furthermore, it combines the residual message buffer size of nodes with the angle between motion directions of nodes to determine more efficient and extensive message spraying in the network. The simulation results clearly indicate that STCESW significantly outperforms the other three enhanced algorithms in both SPMBM and RWP. It demonstrates its robust performance in terms of delivery probability, showing an increase ranging from 2% to 87% across diverse node buffer sizes or simulation time intervals. Additionally, it compromises slightly on delivery latency while maintaining relatively stable message latency and buffer time. [ABSTRACT FROM AUTHOR]

In this work, we reported a facile one-pot strategy to construct conjugated vinylene-extended viologen-based ionic radical polyacetylenes (denoted as VIRPs) for visible light-promoted photocatalytic carbon dioxide (CO2) cycloaddition under ambient conditions. As expected, the ionic polymer VIRP-1 was directly prepared in situ by the quaternization-induced spontaneous polymerization (QISP) reaction between 1,2-bis(4-pyridyl)ethylene (BPE) and propargyl bromide (PGB) in CH3CN at 100 °C for 24 h without any catalysts and initiators. To our delight, the radical character of the ionic radical polymer VIRP-2 could be significantly enhanced by using K2CO3 as an alkaline reductant in the QISP reaction process, similar to the synthesis of VIRP-1, which was confirmed by electron paramagnetic resonance (EPR) spectroscopy and X-ray photoelectron spectroscopy (XPS). It was found that the use of K2CO3 not only achieved the in situ one-electron reduction of vinylene-extended viologen cations to stable viologen cationic radicals, but also could remove a large proportion of Br− anions and afford non-halogen anions CO32− within VIRP-2 by anion exchange during the synthetic process. Both ionic radical polyacetylenes VIRP-1 and VIRP-2 exhibit strong and broad visible light-harvesting ability; however, VIRP-2 with much stronger radical intensity possesses better photoinduced charge separation and migration ability. Therefore, the ionic radical polymer VIRP-2 was regarded as a highly efficient and green metal-free heterogeneous photocatalyst in the visible-light-promoted catalytic CO2 conversion with various epoxides into cyclic carbonates at room temperature and atmospheric pressure without using any cocatalysts and solvents. This work affords a new direction to construct task-specific ionic radical polymers towards photocatalytic CO2 cycloaddition under ambient conditions. [ABSTRACT FROM AUTHOR]

Although video affective content analysis has great potential in many applications, it has not been thoroughly studied due to limited datasets. In this article, we construct a large-scale video affective dataset with danmu (VAD). It consists of 19,267 elaborately segmented video clips from user-generated videos. The VAD dataset is annotated by the crowdsourcing platform with discrete valence, arousal, and primary emotions, as well as the comparison of valence and arousal between two consecutive video clips. Unlike previous datasets, including only video clips, our proposed dataset also provides danmu, which is the real-time comment from users as they watch a video. Danmu provides extra information for video affective content analysis. As a preliminary assessment of the usability of our dataset, an analysis of inter-annotator consistency for each label is conducted using weighted Fleiss’ Kappa, regular Fleiss’ Kappa, intraclass correlation coefficient, and percent consensus. Besides, we also perform a statistical analysis of labels and danmu. Finally, video affective content analysis is conducted on our dataset and three typical methods (i.e., TFN, MulT, and MISA) are leveraged to provide benchmarks. We also demonstrate that danmu can significantly improve the performance of the video affective content analysis task on some labels. Our dataset is available for research purposes. [ABSTRACT FROM AUTHOR]

Manipulating the atomic structure of the catalyst and tailoring the dissociative water‐hydrogen bonding network at the catalyst‐electrolyte interface is essential for propelling alkaline hydrogen evolution reaction (HER) and hydrazine oxidation reaction (HzOR), but remains a great challenge. Herein, we constructed an advanced a‐RuMo/NiMoO4/NF heterogeneous electrocatalyst with amorphous RuMo alloy nanoclusters anchored to amorphous NiMoO4 skeletons on Ni foam by a heteroatom implantation strategy. Theoretical calculations and in situ Raman tests show that the amorphous and alloying structure of a‐RuMo/NiMoO4/NF not only induces the directional evolution of interfacial H2O, but also lowers the d‐band center (from −0.43 to −2.22 eV) of a‐RuMo/NiMoO4/NF, the Gibbs free energy of hydrogen adsorption (ΔGH*, from −1.29 to −0.06 eV), and the energy barrier of HzOR (ΔGN2(g)=1.50 eV to ΔGN2*=0.47 eV). Profiting from these favorable factors, the a‐RuMo/NiMoO4/NF exhibits excellent electrocatalytic performances, especially at large current densities, with an overpotential of 13 and 129 mV to reach 10 and 1000 mA cm−2 for HER. While for HzOR, it needs only −91 and 276 mV to deliver 10 and 500 mA cm−2, respectively. Further, the constructed a‐RuMo/NiMoO4/NF||a‐RuMo/NiMoO4/NF electrolyzer demands only 7 and 420 mV to afford 10 and 500 mA cm−2. [ABSTRACT FROM AUTHOR]

In order to improve the fatigue performance of the aviation lug structure,a finite element（FE） model of composite strengthening process which contains cold expansion and interference fit has been established. The influence of technological parameters on plastic deformation around hole and fatigue life of lugs has been analyzed. The residual stress test around the lug hole was carried out to verify the accuracy of the FE model. The results indicate that the plastic flow of the hole wall material with the mandrel makes the deformation of the hole wall unevenly distributed in the thickness direction. And the elastic-plastic boundary transfers to the outer side of the lug with the increase of the expansion amount. Further research shows that the maximum stress amplitude is always located at the wall of the hole and the mean stress level is the highest at the entrance when the lug structure is subjected to alternating loads. For the structure of TC4 titanium alloy lug,the increment of fatigue life can reach the maximization when the process parameters consist of 3% cold expansion and 1% interference fit.

In this work, we reported a facile one‐pot route to construct polyhedral oligomeric silsesquioxane (POSS) and phosphonium‐based ionic porous hypercrosslinked polymers (denoted as P‐iPHCPs) with multiple catalytic active sites, which could be regarded as efficient heterogeneous catalysts for the conversion of carbon dioxide (CO2) to highly value‐added cyclic carbonates. The targeted polymers P‐iPHCPs were prepared from a rigid building block octavinylsilsesquioxane (VPOSS) and a low‐cost commercially available organic ionic salt methyltriphenylphosphonium bromide ([Ph3PMe]Br) by the AlCl3‐catalyzed Friedel‐Crafts reaction. The series of polymers P‐iPHCPs that synthesized by different molar ratios of VPOSS to [Ph3PMe]Br possess hierarchical micro/mesoporous structures with high surface areas ranging from 376 to 429 m2 g−1 and behave the flower‐like nano‐morphology. Especially, the desired multiple active sites involved the mixed anions including free Cl−, Br− anions and the in‐situ formed metal‐halogen complex anion [AlCl3Br]− within phosphonium segments, and the enriched POSS‐derived SiOH hydrogen bond donor (HBD) groups that derived from the breakage of POSS cages during the synthetic process. The typical polymer P‐iPHCP‐14 has the aforementioned nucleophilic‐electrophilic multiple catalytic active sites, which was regarded as an efficient recyclable heterogeneous catalyst for synergistic catalytic conversion of CO2 with various epoxides into cyclic carbonates under mild conditions. [ABSTRACT FROM AUTHOR]

Opportunistic mobile networks, as an important supplement to the traditional communication methods in unique environments, are composed of mobile communication devices. It is a network form that realizes message transmission by using the opportune encounter of these mobile communication devices. Consequently, mobile communication devices necessitate periodic contact detection in order to identify potential communication opportunities, thereby leading to a substantial reduction in the already limited battery life of such devices. Previous studies on opportunistic networks have often utilized geographic information in routing design to enhance message delivery rate. However, the significance of geographic information in energy conservation has been overlooked. Furthermore, previous research on energy-efficient routing has lacked diversification in terms of the methods employed. Therefore, this paper proposes a dynamic co-operative energy-efficient routing algorithm based on geographic information perception (DCEE-GIP) to leverage geographic information to facilitate dynamic co-operation among nodes and optimize node sleep time through probabilistic analysis. The DCEE-GIP routing and other existing algorithms were simulated using opportunistic network environment (ONE) simulation. The results demonstrate that DCEE-GIP effectively extends network service time and successfully delivers the most messages. The service time of DCEE-GIP increased by 8.05∼31.11%, and more messages were delivered by 14.82∼115.9%. [ABSTRACT FROM AUTHOR]

Although expression descriptions provide additional information about facial behaviors despite of different poses, and pose features are beneficial to adapt to pose variety, neither has been fully leveraged in facial expression recognition. This paper proposes a pose-aware text-assisted facial expression recognition method using cross-modality attention. Specifically, the method contains three components. The pose feature extractor extracts pose-related features from facial images, and then cooperates with a fully-connected layer for pose classification. When poses can be clearly discriminated and classified, features obtained from the extractor can represent the corresponding poses. To eliminate bias due to appearance and illumination, cluster centers are taken as the final pose features. The text feature extractor obtains embeddings from expression descriptions. These descriptions are first passed through Intra-Exp attention to obtain preliminary embeddings. To leverage the correlations among expressions, all expression embeddings are then concatenated and passed through Inter-Exp attention. The cross-modality module attempts to learn attention maps that distinguish the importance of facial regions by using prior knowledge about poses and expression descriptions. The image features weighted by the attention maps are utilized to recognize pose and expression jointly. Experiments on three benchmark datasets demonstrate the superiority of the proposed method. [ABSTRACT FROM AUTHOR]