Background
Health science popularization short video disseminates health information to the public in an understandable way about health information.
Objective
To investigate the preferences of ...Chinese residents for health science popularization short videos and provide suggestions for optimizing the production of short videos.
Methods
An online survey of Chinese people was conducted using a self-administered questionnaire, and a discrete choice experiment (DCE) was used to explore the public’s preferences for health science popularization short videos.
Results
A total of 618 respondents were included, of which 306 (45.51%) were male and 312 (50.49%) were female, 271 (43.85%) were aged 18–25, 239 (38.67%) were aged 26–60, and 108 (17.48%) were aged 60 and above. Whether the video is charged or not (46.891%) and the account subject (28.806%) were both considered important. The results of the DCE revealed that the participants considered video free of charge as the most significant attribute of health science popularization short videos (OR 3.433, 95% CI 3.243–3.633). Overall, participants preferred and were more willing to pay for health science popularization short videos with a hospital account subject (OR 1.192, 95% CI 1.116–1.274), with the form of graphic narration (OR 1.062, 95% CI 1.003–1.126), free of charge (OR 3.433, 95% CI 3.243–3.633), with the content that satisfies their needs (very much needed: OR 1.253, 95% CI 95% CI 1.197–1.311; generally needed: OR 1.078, 95% CI 1.029–1.129), with platform certification (OR 1.041, 95% CI 1.011–1.073), without commercial advertisements (OR 1.048, 95% CI 1.018–1.080), with simple-to-understand content (OR 1.071, 95% CI 1.040–1.104), and with video content that evokes fear or dread of illness in the viewer (OR 1.046, 95% CI 1.015–1.078).
Conclusion
Participants favor free health popularization short videos, which are hospital accounts, with content that is illustrated, understandable, meets their needs, and can serve as a warning. In the future, the production of health popularization short videos should focus on improving the diversity and relevance of video content, making it as easy to understand to achieve good science popularization effects.
BiVO4-based photoanode is one of the most promising photoanodes for photoelectrocatalytic water splitting. However, the serious problem of interface charge recombination limits its further ...development. Here, a Mo:BiVO4/NiOx/CPF-TCzB/NiCoBi photoanode is constructed with double hole transport layer and an energy level gradient to achieve an effective photo-generated holes extraction and accumulation at the surface electrocatalyst. The conjugated polycarbazole framework CPF-TCzB is used as hole transport layer to eliminate the charge recombination center between Mo:BiVO4 and NiCoBi electrocatalyst and realize the extraction and storage of photo-generated hole; NiOx nanoparticles are further inserted between Mo:BiVO4 and CPF-TCzB to form a gradient energy level, eliminating the energy level barrier and optimizing band alignment. As a result, Mo:BiVO4/NiOx/CPF-TCzB/NiCoBi achieves a much higher photocurrent densities of 3.14 mA cm-2 than that of Mo:BiVO4 (0.42 mA cm-2) at 0.6 V versus RHE. This work provides an specific way to adjust the band structure of BiVO4-based photoanodes and realize efficient hole extraction and storage for PEC water splitting.BiVO4-based photoanode is one of the most promising photoanodes for photoelectrocatalytic water splitting. However, the serious problem of interface charge recombination limits its further development. Here, a Mo:BiVO4/NiOx/CPF-TCzB/NiCoBi photoanode is constructed with double hole transport layer and an energy level gradient to achieve an effective photo-generated holes extraction and accumulation at the surface electrocatalyst. The conjugated polycarbazole framework CPF-TCzB is used as hole transport layer to eliminate the charge recombination center between Mo:BiVO4 and NiCoBi electrocatalyst and realize the extraction and storage of photo-generated hole; NiOx nanoparticles are further inserted between Mo:BiVO4 and CPF-TCzB to form a gradient energy level, eliminating the energy level barrier and optimizing band alignment. As a result, Mo:BiVO4/NiOx/CPF-TCzB/NiCoBi achieves a much higher photocurrent densities of 3.14 mA cm-2 than that of Mo:BiVO4 (0.42 mA cm-2) at 0.6 V versus RHE. This work provides an specific way to adjust the band structure of BiVO4-based photoanodes and realize efficient hole extraction and storage for PEC water splitting.
Abstract BiVO 4 ‐based photoanode is one of the most promising photoanodes for photoelectrocatalytic water splitting. However, the serious problem of interface charge recombination limits its further ...development. Here, a Mo:BiVO 4 /NiO x /CPF‐TCzB/NiCoBi photoanode is constructed with double hole transport layer and an energy level gradient to achieve an effective photo‐generated holes extraction and accumulation at the surface electrocatalyst. The conjugated polycarbazole framework CPF‐TCzB is used as hole transport layer to eliminate the charge recombination center between Mo:BiVO 4 and NiCoBi electrocatalyst and realize the extraction and storage of photo‐generated hole; NiO x nanoparticles are further inserted between Mo:BiVO 4 and CPF‐TCzB to form a gradient energy level, eliminating the energy level barrier and optimizing band alignment. As a result, Mo:BiVO 4 /NiO x /CPF‐TCzB/NiCoBi achieves a much higher photocurrent densities of 3.14 mA cm −2 than that of Mo:BiVO 4 (0.42 mA cm −2 ) at 0.6 V versus RHE. This work provides an specific way to adjust the band structure of BiVO 4 ‐based photoanodes and realize efficient hole extraction and storage for PEC water splitting.
The integration of aggregation-induced emission (AIE) and two-photon absorption (2PA) into one molecule is very important because such a combination would endow the material with a synergetic effect ...for diverse and broader applications. Herein, two regioisomers based on perylene diimide and anthracene moieties are designed and synthesized. The as-prepared compounds exhibit distinct AIE and 2PA properties, where the bay-substituted one exhibits common AIE and 2PA properties, while the ortho-substituted one exhibits not only enhanced and accelerated AIE performance, but also improved 2PA properties. This research would provide a general approach to explore efficient molecules by the marriage of accelerated AIE and enhanced 2PA that could improve their performance in various areas.
We present an isomerism strategy to study the substitution position of perylene diimides on the performances of aggregation-induced emission (AIE) and two-photon absorption (2PA). Interestingly, enhanced AIE and 2PA have been achieved.
Herein, a real‐time, fast, tightly coupled simultaneous localization and mapping (SLAM) system is proposed. The deep neural network is used to segment the point cloud semantically to construct the ...point cloud semantic map descriptor, and the global navigation satellite system real‐time kinematic position is used to detect the loop closure. Finally, a factor‐graph model is used for global optimization. The working principle of the SLAM system is introduced in detail, including the construction of the factor graph, the generation of the point cloud semantic graph descriptor, the generation of the ring graph, the loop‐closure detection process, and the global optimization. Indoor and outdoor experiments are conducted to validate the performance of overall trajectory estimation and loop‐closure detection. Compared to traditional methods, the proposed method offers improved accuracy and real‐time performance in trajectory estimation. It effectively addresses issues such as limited feature constraints, large computational consumption, and subpar real‐time performance, allowing for quick and accurate loop‐closure detection. Moreover, the method demonstrates a time consumption reduction of two‐thirds compared to traditional approaches while exhibiting superior overall loop‐closure detection performance.
Herein, a real‐time, fast, tightly coupled simultaneous localization and mapping system is proposed. The deep neural network is used to segment the point cloud semantically to construct the point cloud semantic map descriptor, and the loop‐closure detection is performed with global navigation satellite system real‐time kinematic position information. Finally, the factor‐graph model is used for global optimization.
Regioisomerism is an efficient strategy for finely tuning the structures of molecules in the isolated or the aggregated state. Herein, two regioisomers of perylene diimide (PDI) derivatives have been ...designed and synthesized. The positions of the substituent anthraquinone groups display distinct influences on their molecular conformation and aggregate structures, resulting in different fluorescence properties upon one- and two-photon excitation. In addition, owing to the bright emission, cellular imaging tests based on their nanoparticles were also conducted.
The isomerism effect on the aggregate emission properties of perylene diimide derivatives is studied. Banking on their bright emission, a cellular imaging test based on their nanoparticles is also conducted.
The principle of generative adversarial net is to fit the given data distribution by combining a generative model and discriminative model. There are two major challenges to conventional systems – ...they are difficult to train and they easily fall into ‘mode collapse’. To improve it, this study describes a novel network structure with dual generators. A ‘cooperation’ mechanism is introduced to help the generators work together. During training, generators not only learn from discriminative feedback but also from each other (like a study group). Compared with a single-generator network, a dual-generator network could capture many more ‘modes’ and eventually reduce the impact of ‘mode collapse.’ Dual networks also require extra computational resources. However, our experiment shows that even with network parameters of similar size, dual networks still achieved better results. Additionally, a dual-generator structure could be extended to multiple generators. The proposed network structure is also very robust and flexible. It can be adapted to various application scenarios, such as high-resolution image generation, domain adaptation and 3D model generation. The experimental results showed that with the same computing resources, multiple generators can generate better quality synthetic data, including 2D images, 3D objects, style transferring etc.
High-performance triboelectric nanogenerators (TENGs) are usually made of expensive, unsustainable, and non-biodegradable materials, limiting their development for wearable applications and posing ...environmental problems for their disposal. Here, we mitigate this challenge by reporting a highly polarizable, low-cost, and biodegradable tribopositive material, made of poly-ε-caprolactone (PCL)/ethyl cellulose (EC) biocomposite. PCL (weakly polarizable, but mechanically robust) and EC (highly polarizable, but mechanically weak) learn from each other’s strengths and complement each other’s weaknesses. The obtained PCL/EC-based TENG reached a peak power density of 157.17 mW/m2 at optimized 6 wt % EC (at 40 MΩ load, 11 N), enhanced by 46 times. Thanks to the good flexibility, high tensile mechanical property, remarkable stability, and biodegradability, TENG can be comfortably attached on the human body as a wearable motion sensor, in addition to energy harvesting applications. Our work greatly contributes to the development of environmental sustainability, which results from reduction of electronic waste generation.
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•An effective tribopositive PCL/EC material is desired•The high-performance PCL/EC biocomposite shows good biodegradation property•Flexible TENG can be conformably attached to the human body as a wearable sensor
Fan et al. propose a highly polarizable, low-cost, and biodegradable tribopositive poly-ε-caprolactone/ethyl cellulose material by controlling the mass ratio of ethyl cellulose. In addition to energy harvesting applications, the flexible TENG can also be conformably attached to the human body as a wearable motion sensor.
Objectives
To compare the efficacy of transarterial embolization (TAE) with polyvinyl alcohol (PVA) particles alone and lipiodol–bleomycin emulsion (LBE) plus PVA particles for patients with ...unresectable large symptomatic focal nodular hyperplasia (FNH).
Methods
We performed a retrospective analysis of patients who underwent TAE either with PVA particles alone (group A,
n
= 46) or LBE plus PVA particles (group B,
n
= 35) for large (≥ 7 cm) symptomatic FNH between January 2002 and February 2019. Propensity score matching (PSM) (1:1) was performed to adjust for potential baseline confounders. Technical success, adverse events (AEs), symptom relief, and changes in the lesion size after TAE were evaluated. Statistical analysis included Wilcoxon rank sum test and
χ
2
test.
Results
After PSM, no significant differences in baseline characteristics were found between the groups (31 in group A and 31 in group B, with a mean age of 31 years). Technical success was achieved in all patients (100%), without major AEs in both groups. Complete resolution of the abdominal symptoms was reported in 77.4% in group A and 100% in group B (
p
= 0.037) during a mean follow-up period of 72 months; complete resolution (CR) of the FNH rate was significantly higher in group B than in group A (93.6% vs. 67.7%;
p
= 0.019).
Conclusion
Compared with the use PVA particles alone, TAE with LBE plus PVA particles in the treatment of patients with large symptomatic FNH had a significantly higher rates of CR of the FNH and complete relief of the symptoms.
Key Points
•
Transarterial embolization (TAE) with lipiodol-bleomycin emulsion (LBE) plus PVA particles for the large symptomatic FNH yielded better results than with PVA particles alone, in terms of complete resolution of FNH lesions (93.6% vs 67.7%) and complete relief of the abdominal symptoms (100% vs 77.4%) during a mean follow-up period of 72 months (38–170 months).
•
No major complications were recorded in both groups, and no significant difference in the incidence of postembolization syndrome were observed between the two groups.
Pore-size dominated K-ion storage behaviour in covalent triazine frameworks.
Two homologous covalent triazine frameworks (CTFs) have been developed for the first time as anode materials for high ...performance K-ion batteries (KIBs). The two-dimensional sheet-like structure as well as the regular channels in CTFs enable the process of intercalation/deintercalation of K-ions into/from the CTF interlayers reversibly. Particularly, a size effect of the porous structure is found to dominate the K-ion storage behavior. CTF-0 with a smaller pore size displays a higher K-ion storage capacity than CTF-1. Molecular simulations reveal the operation mechanism, showing that the depotassiation process in CTF-0 is exothermic while the depotassiation in CTF-1 is endothermic, which makes the deintercalation of K-ions from CTF-0 more feasible than from CTF-1 and contributes to the higher reversible capacity of CTF-0. This work provides a promising strategy for rational design of high-performance organic anode materials by structural modulation at the molecular scale.
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