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This paper explores the citizenship learning of Chinese young adults through examining their participation on Weibo (the biggest micro-blogging service in China). Interview data collected from 31 young mainland Chinese adults contained their reflections on their everyday online participation on Weibo. Using the theory of communities of practice, this paper describes the citizenship learning that occurred in the context of their online participation in two intersecting dimensions. One dimension is their learning of digital citizenship in the Weibo community, manifested in their understanding and grasp of language, values, attitudes and shared commitment in this virtual space. The other is their learning of Chinese citizenship which is embodied in their understanding of Chinese society arising from their reflections of their internet-mediated social participation. This paper brings new insights into the concept of citizenship exhibited in the everyday online participation of Chinese young people, and the mutually constitutive relationship between their learning of citizenship and the forging of new citizenship. The implications of this informal learning for the content and pedagogy of formal citizenship education is discussed.

The contact of the closing resistance of a certain 1 100 kV circuit breaker is faulty. Two short bolts are falling off and two long bolts are broken and separated. By technical means of macro inspection， dimensional measurement， metallographic analysis and so on， the material， connection and operation conditions are discussed， the finite element analytical model with high precision is developed， and the fault cause is analyzed by considering the height difference of bolt hole between long bolt and short bolt and the impact of operation load. The results show that both long bolts and short bolts are intact， but the long bolts show obvious fatigue fracture morphology. Further analysis shows that when the closing resistance and the active arc contact press cylinder are fully fastened， the height difference of bolt hole between the long bolt and short bolt forms the tension， which loosens the long bolt and produces cracks at the connecting plate， thus the long bolts are broken under the action of long-term opening and closing. The height difference of the blot hole can be identified as the main cause of breaking of closing resistance fastening bolts.

Abstract Farmers' participation in food safety governance is an important part of food safety social co-governance, and the accurate identification of its influencing factors and their related paths is of guiding significance to the scientific decision-making of food safety governance. The system of influencing factors of farmers' participation in food safety governance was constructed from four dimensions, and the influence network of each dimension was revealed by decision laboratory analysis (DEMATEL). The hierarchical structure and correlation path of influencing factors were determined by interpretive structural model (ISM), and the attributes of influencing factors were further classified by cross influence matrix multiplication (MICMAC). The results show that the influencing factors of farmers' participation in food safety governance can be divided into seven levels, among which the level of education and the status of village cadres are the fundamental characteristic factors. The degree of rural informatization, the intensity of government supervision, the promotion of village committees, the response of the government and the degree of disclosure of government information are the deep core factors, and risk cognition, political trust and family eating habits are special factors. Taking the importance and attribute status of farmers' participation in food safety governance into decision-making considerations is of great significance to improve the efficiency of food safety governance.

In order to research the effect of viscosity modifying admixture (VMA) on the rebar rust resistance in self-compacting concrete, stereoscopic microscope, linear polarization, electrochemical impedance spectroscopy and Tafel polarization test method were utilized to study the effect of three commonly used viscosity modifying admixtures, polyacrylamide (PAM), hydroxypropyl methyl cellulose (HPMC) and hydroxyethyl cellulose (HEC) on the rebar rust resistance performance in simulated concrete pore solution. Results showed that PAM, HPMC and HEC could effectively inhibit the corrosion of rebar in simulated concrete pore solution. With the content of VMAs increasing, the corrosion resistance of rebar was enhanced. The rust resistance ability of the three VMAs on rebar increased in the following order: HEC< HPMC< PAM. Furthermore, the inhibition effect of PAM, HPMC and HEC on the cathodic corrosion process of rebar was stronger than that of the anodic process. Among them, PAM and HPMC were cathode type rust inhibitors, while HEC was a mixed type rust inhibitor that mainly suppressed the cathode.

Abstract Acute pancreatitis (AP) is one of the life‐threatening diseases of the digestive system. MicroRNA has been asserted to be a regulator of AP. This paper explored the miR‐374a‐5p expression in AP patients and investigated the efficacy of AR42J cells. In this study, 60 healthy people, 58 MAP patients and 58 SAP patients were included, and the serum miR‐374a‐5p levels of the subjects were detected by RT‐qPCR technology. The pancreatitis cell model was structured by stimulating AR42J cells with cerulein. Next, cell viability and apoptosis were detected by CCK‐8 assay and flow cytometry. ELISA was used to measure the concentration of cytokines, such as TNF‐α, IL‐6, and IL‐1β. The data showed that miR‐374a‐5p was downregulated in samples from AP patients, while showing discriminative power for AP populations. Attenuated miR‐374a‐5p were negatively bound up with patients' Ranson score and APACHE II score. Besides, miR‐374a‐5p was declined in cerulein‐treated AR42J cells and forced elevation of miR‐374a‐5p was beneficial to increase cell viability, and inhibit cell apoptosis and inflammation. The present study found that miR‐374a‐5p was reduced in AP serum samples, and up‐regulated expression level of miR‐374a‐5p in cell models had a protective effect on cerulein‐induced inhibition of cell function and inflammatory response.

Background: COVID-19 and influenza have similar clinical presentations that can range from mild to severe disease. The World Health Organization recommends that countries use existing influenza surveillance to monitor COVID-19 transmission in communities. We aim to describe the surveillance and investigation of COVID-19 at the early stage of the pandemic in Taiwan. Methods: In February 2020, the Taiwan Centers for Disease Control enhanced COVID-19 surveillance through its existing influenza surveillance. We retrospectively tested patients for SARS-CoV-2 who had symptoms of severe complicated influenza but were negative in influenza testing. We conducted an epidemiological investigation and contact tracing for the index patient and secondary cases to prevent virus transmission. Results: We identified the first COVID-19 patient on February 15 through enhanced COVID-19 surveillance. He had no history of traveling abroad and an unclear history of contact with COVID-19 cases. He presented with influenza-like illness on January 27 and was hospitalized from February 3 to 15. We identified 39 close contacts of the index patient, including 11 family members and 28 healthcare workers. In total, four close family contacts of the index patient tested positive for SARS-CoV-2. An additional 84 close contacts of the four secondary cases were identified and traced; none was diagnosed with COVID-19. Conclusions: We recommend enhancing COVID-19 surveillance by testing patients with influenza-like illness. To prevent the spread of COVID-19, we recommend using appropriate personal protective equipment when in close contact with patients who present with influenza-like illness or when caring for patients with pneumonia of unknown etiology.

ObjectiveTo assess the interplay among psychopathological symptoms and real-life functioning, and to further detect their influence with violent behavior in patient with schizophrenia.MethodsA sample of 1,664 patients with post-violence assessments and their propensity score–matched controls without violence from a disease registration report system of community mental health service in Guangdong, China, were studied by network analysis. Ising-Model was used to estimate networks of psychopathological symptoms and real-life functioning. Then, we tested whether network properties indicated the patterns of interaction were different between cases and controls, and calculated centrality indices of each node to identify the central nodes. Sensitivity analysis was conducted to examine the difference of interaction patterns between pre-violence and post-violence assessments in violence cases.ResultsSome nodes in the same domain were highly positive interrelations, while psychopathological symptoms were negatively related to real-life functioning in all networks. Many symptom-symptom connections and symptom-functioning connections were disconnected after the violence. The network density decreased from 23.53% to 12.42% without statistical significance (p = 0.338). The network structure, the global network strength, and the global clustering coefficient decreased significantly after the violence (p

It is proposed to build a high-speed railway through the China‒Mongolia‒Russia economic corridor (CMREC) which runs from Beijing to Moscow via Mongolia. However, the frozen ground in this corridor has great impacts on the infrastructure stability, especially under the background of climate warming and permafrost degradation. Based on the Bayesian Network Model (BNM), this study evaluates the suitability for engineering construction in the CMREC, by using 21 factors in five aspects of terrain, climate, ecology, soil, and frozen-ground thermal stability. The results showed that the corridor of Mongolia's Gobi and Inner Mongolia in China is suitable for engineering construction, and the corridor in Amur, Russia near the northern part of Northeast China is also suitable due to cold and stable permafrost overlaying by a thin active layer. However, the corridor near Petropavlovsk in Kazakhstan and Omsk in Russia is not suitable for engineering construction because of low freezing index and ecological vulnerability. Furthermore, the sensitivity analysis of influence factors indicates that the thermal stability of frozen ground has the greatest impact on the suitability of engineering construction. These conclusions can provide a reference basis for the future engineering planning, construction and risk assessment.