Table_1_Dynamic mechanism of eliminating COVID-19 vaccine hesitancy through web search.DOCX

This research focuses on the research problem of eliminating COVID-19 vaccine hesitancy through web search. A dynamic model of eliminating COVID-19 vaccine hesitancy through web search is constructed based on the Logistic model, the elimination degree is quantified, the elimination function is defined to analyze the dynamic elimination effect, and the model parameter estimation method is proposed. The numerical solution, process parameters, initial value parameters and stationary point parameters of the model are simulated, respectively, and the mechanism of elimination is deeply analyzed to determine the key time period. Based on the real data of web search and COVID-19 vaccination, data modeling is carried out from two aspects: full sample and segmented sample, and the rationality of the model is verified. On this basis, the model is used to carry out dynamic prediction and verified to have certain medium-term prediction ability. Through this research, the methods of eliminating vaccine hesitancy are enriched, and a new practical idea is provided for eliminating vaccine hesitancy. It also provides a method to predict the quantity of COVID-19 vaccination, provides theoretical guidance for dynamically adjusting the public health policy of the COVID-19, and can provide reference for the vaccination of other vaccines.</p

Fabrication of Flexible Thermoplastic Polyurethane/Coal Hydrogasification Semi-coke Composites with Low rGO Content for High-Performance Microwave Absorption

Semi-coke (SC), a residue of coal hydrogasification, is recycled and incorporated into thermoplastic polyurethane (TPU) to create composites for microwave absorption (MA). Herein, we developed porous reduced SC (rSC)–reduced graphene oxide (rGO) hybrids (SGHs) via in situ reduction of a preoxidized SC (oSC) and graphene oxide (GO) mixture. Low-content GO was introduced to considerably improve the dielectric properties of SGHs while decreasing the production cost. Then, a solution blending technique was applied to develop microwave absorbers using TPU as the matrix. The obtained TPU/SGH5 composite with a feed ratio of 5:1 (oSC:GO) showed an optimum reflection loss of −48.81 dB at a thickness of 2.5 mm and an effective absorption bandwidth of 4.30 GHz (7.74–12.04 GHz) in 2–18 GHz. However, the MA property of the obtained composites with the same amount of rSC or rGO alone was not comparable to that of the TPU/SGH5 composite. The inherent magnetism, heteroatoms, and abundance of heterogeneous surfaces of rSC and the considerable dielectric loss of rGO worked together to improve the MA performance of TPU/SGH composites. This study offers an easy and effective technical method for producing high-performance microwave absorbers with a low rGO content, illuminating the path toward achieving sustainable development by converting waste into wealth

Energy diagram showing the photobleaching pathway via the triplet state.

<p>The fluorescence (fl) lifetime of the excited state S₀ is typically a few to several ns. When trapped in the triplet state (T₀), it will take ∼µs to relax to the ground state. Further excitations form the triplet states are more likely to bleach the fluorophore.</p

Temporal profile of the excitation pulse, fluorescence, and depletion beam.

<p>(a) In a CW STED configuration, the CW depletion beam at 532 nm illuminates the sample at all time. (b) In the modulated-CW STED configuration, the CW 532 nm laser is modulated by an acousto-optic Bragg cell to generate 10 ns pulses, which significantly reduce the laser exposure to the sample.</p

Two-photon excited fluorescence depletion of ATTO 425 depends on the 532 nm depletion beam.

<p>Two-photon excited fluorescence depletion of ATTO 425 depends on the 532 nm depletion beam.</p

Experimental setup for 2PE-STED microscopy.

<p>(a) Schematic layout of modulated CW 2PE-STED microscopy. (b) The doughnut-shape intensity profile of the 532 nm depletion beam was obtained by using a spiral phase plate shown in (a). (c) The Gaussian intensity profile of the two-photon excitation beam at 860 nm.</p

Oxygen transport in proton exchange membrane fuel cells with metal foam flow fields

Metal foam flow fields have shown great potential in improving the performance of proton exchange membrane (PEM) fuel cells, while their effect on the oxygen transport process remains inadequately understood. In this study, oxygen transport in metal foam flow fields (under zero-humidity operating conditions) is simulated by using a three-dimensional multi-species lattice Boltzmann model. Comparison is done between the metal foam flow field and the conventional channel-rib flow field, and parametric studies are conducted on the metal foam porosity, pore density, and compression ratio. Results show that the metal foam flow field enhances mass transfer of oxygen to the catalyst layer and improves the oxygen distribution homogeneity. Within the range of parameters considered, decrease in the metal foam porosity yields nonmonotonic variation of the mass transfer rate of oxygen to the catalyst layer, which increases at high inlet velocities (higher than 2 m/s) but decreases at low inlet velocities (less than 2 m/s). The increase in metal foam pore density and compression ratio leads to enhanced mass transfer of oxygen, which becomes increasingly prominent at high inlet velocity. The results of this study could be insightful for the implementation of metal foam flow fields in PEM fuel cells

Efficient Nanofibrous Membranes for Antibacterial Wound Dressing and UV Protection

Materials with a hierarchical structure often demonstrate superior properties with combined and even synergistic effects of multiple functions. Herein, we report the design of a new class of material with a multicompartment nanofibrous structure as a promising candidate for antibacterial wound dressing and functional textile applications. The design consists in first synthesizing nanocapsules loaded with functional payloads and subsequently embedding the nanocapsules into polymer nanofibers by using the colloid-electrospinning technique. The nanocontainer-in-nanofiber structure allows for a selective and separate loading of different functional agents with different polarities, and it offers a flexible combination of the properties of nanocontainers and nanofibers. An example of the potential for these multicompartment materials is demonstrated here, in which the synergistic antibacterial effect against <i>E. coli K-12</i> and <i>B. Subtilis</i> combined with anti-UV property is shown

Burden of tuberculosis in Xinjiang between 2011 and 2015: A surveillance data-based study

<div><p>Background</p><p>Despite the reduction in reported incidence of tuberculosis globally, the burden of pulmonary tuberculosis (PTB) remains high in low- and middle- income countries, including China. The current study aims to evaluate the distribution and trend of PTB incidence in Xinjiang, the region with the highest PTB burden in China.</p><p>Methods</p><p>We identified all confirmed PTB case records reported to the Chinese TB Information Management System (TBIMS) between 2011 and 2015. We analyzed these records to measure the annual incidence of reported smear-positive PTB cases in Xinjiang and its trend over time. We also analyzed incidence by gender, residential area, and region. Spatial analysis was used to describe the inter-regional disparity of the disease burden during the study period.</p><p>Results</p><p>We identified 212,216 smear-positive PTB cases between 2011 and 2015. The reported incidence increased from 180.8 cases in 2011 to 195.8 cases in 2015 per 100,000 population. The southern region of Xinjiang had the highest disease burden (257.8/100,000 in 2011 and 312.7/100,000 in 2015). More than 60% cases occurred in persons >45 years, and 76% of cases lived in rural areas.</p><p>Conclusion</p><p>To reach the goal of elimination and control of TB, more comprehensive STOP TB strategies should be implemented in Xinjiang. Residents in the southern region and rural areas of Xinjiang require particular attention.</p></div

Geological distribution of the number of reported PTB in Xinjiang, China (2011 and 2015).

<p>*Note: A is for 2011, and B is for 2015.</p