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"He, Xu"
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Quantifying the triboelectric series
Triboelectrification is a well-known phenomenon that commonly occurs in nature and in our lives at any time and any place. Although each and every material exhibits triboelectrification, its quantification has not been standardized. A triboelectric series has been qualitatively ranked with regards to triboelectric polarization. Here, we introduce a universal standard method to quantify the triboelectric series for a wide range of polymers, establishing quantitative triboelectrification as a fundamental materials property. By measuring the tested materials with a liquid metal in an environment under well-defined conditions, the proposed method standardizes the experimental set up for uniformly quantifying the surface triboelectrification of general materials. The normalized triboelectric charge density is derived to reveal the intrinsic character of polymers for gaining or losing electrons. This quantitative triboelectric series may serve as a textbook standard for implementing the application of triboelectrification for energy harvesting and self-powered sensing.
Triboelectric charging is a well-known phenomenon, but triboelectric polarization has only been ranked qualitatively. Here the authors develop a quantified triboelectric series for a wide range of polymers by measuring triboelectric charge density with respect to a liquid metal at well-defined conditions.
Journal Article
Quantifying and understanding the triboelectric series of inorganic non-metallic materials
Contact-electrification is a universal effect for all existing materials, but it still lacks a quantitative materials database to systematically understand its scientific mechanisms. Using an established measurement method, this study quantifies the triboelectric charge densities of nearly 30 inorganic nonmetallic materials. From the matrix of their triboelectric charge densities and band structures, it is found that the triboelectric output is strongly related to the work functions of the materials. Our study verifies that contact-electrification is an electronic quantum transition effect under ambient conditions. The basic driving force for contact-electrification is that electrons seek to fill the lowest available states once two materials are forced to reach atomically close distance so that electron transitions are possible through strongly overlapping electron wave functions. We hope that the quantified series could serve as a textbook standard and a fundamental database for scientific research, practical manufacturing, and engineering.
The mechanism of contact electrification remains a topic of debate. Here, the authors present a quantitative database of the triboelectric charge density and band structure of many inorganic materials, verifying that contact electrification between solids is an electron quantum transition effect.
Journal Article
Emperors' treasures : Chinese art from the National Palace Museum, Taipei
\"Features artworks from the ... National Palace Museum, Taipei, [encompassing] paintings, calligraphy, bronzes, ceramics, lacquer ware, jades, and textiles exemplifying ... craftsmanship and imperial taste. The ... book explores the identities of eight Chinese rulers--seven emperors and one empress--who reigned from the early 12th through early 20th centuries. They are portrayed in a story line that highlights artworks of their eras, from the dignified Song to the coarse yet subtle Yuan, and from the brilliant Ming until the final, dazzling Qing period\"-- Provided by publisher.
Book
A review on cell damage, viability, and functionality during 3D bioprinting
Three-dimensional (3D) bioprinting fabricates 3D functional tissues/organs by accurately depositing the bioink composed of the biological materials and living cells. Even though 3D bioprinting techniques have experienced significant advancement over the past decades, it remains challenging for 3D bioprinting to artificially fabricate functional tissues/organs with high post-printing cell viability and functionality since cells endure various types of stress during the bioprinting process. Generally, cell viability which is affected by several factors including the stress and the environmental factors, such as pH and temperature, is mainly determined by the magnitude and duration of the stress imposed on the cells with poorer cell viability under a higher stress and a longer duration condition. The maintenance of high cell viability especially for those vulnerable cells, such as stem cells which are more sensitive to multiple stresses, is a key initial step to ensure the functionality of the artificial tissues/organs. In addition, maintaining the pluripotency of the cells such as proliferation and differentiation abilities is also essential for the 3D-bioprinted tissues/organs to be similar to native tissues/organs. This review discusses various pathways triggering cell damage and the major factors affecting cell viability during different bioprinting processes, summarizes the studies on cell viabilities and functionalities in different bioprinting processes, and presents several potential approaches to protect cells from injuries to ensure high cell viability and functionality.
Journal Article
Statins: a repurposed drug to fight cancer
As competitive HMG-CoA reductase (HMGCR) inhibitors, statins not only reduce cholesterol and improve cardiovascular risk, but also exhibit pleiotropic effects that are independent of their lipid-lowering effects. Among them, the anti-cancer properties of statins have attracted much attention and indicated the potential of statins as repurposed drugs for the treatment of cancer. A large number of clinical and epidemiological studies have described the anticancer properties of statins, but the evidence for anticancer effectiveness of statins is inconsistent. It may be that certain molecular subtypes of cancer are more vulnerable to statin therapy than others. Whether statins have clinical anticancer effects is still an active area of research. Statins appear to enhance the efficacy and address the shortcomings associated with conventional cancer treatments, suggesting that statins should be considered in the context of combined therapies for cancer. Here, we present a comprehensive review of the potential of statins in anti-cancer treatments. We discuss the current understanding of the mechanisms underlying the anti-cancer properties of statins and their effects on different malignancies. We also provide recommendations for the design of future well-designed clinical trials of the anti-cancer efficacy of statins.
Journal Article
Rotated Sphere Packing Designs
We propose a new class of space-filling designs called rotated sphere packing designs for computer experiments. The approach starts from the asymptotically optimal positioning of identical balls that covers the unit cube. Properly scaled, rotated, translated, and extracted, such designs are excellent in maximin distance criterion, low in discrepancy, good in projective uniformity and thus useful in both prediction and numerical integration purposes. We provide a fast algorithm to construct such designs for any numbers of dimensions and points with R codes available online. Theoretical and numerical results are also provided. Supplementary materials for this article are available online.
Journal Article
Factors Influencing Information Adoption in Hotel Reservation Decisions of Chinese Consumers: An Analysis of Information Quality, Credibility, Needs, and Attitudes
Internet and digital media are the prevailing paradigm to determine the decision making of consumers who use different websites and social media platforms to surf for the latest information about their desired products and services. With this rising trend in the consumers, and focusing on the provided online information, this study designed its objectives to elucidate the impact of hotel booking intentions of the consumers on their engagement with the mediation of information adoption. The sample of the study comprised 220 participants, picked randomly through convenience sampling technique. Using the quantitative survey-based strategy, the study used online questionnaires to gather data from hotel consumers in China. The questionnaire assessed different dimensions of information such as needs, attitudes, quality and credibility. The data analysis technique was PLS-SEM, and the bootstrapping method was integrated for the SEM analysis. Findings reveal that there is a positive correlation between hotel booking intention and the consumers’ engagement, information need, credibility, and attitude towards information. This implies that booking intentions act as a stimulus to get credible information to help consumers make an appropriate decision on acquiring a specific product or service, such as hotels
Journal Article