432 research outputs found


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    Online healthcare communities (OHCs) encourage people to disclose their personal information with others to seek support and to accelerate research and help create better treatments. However, disclosing personal information might cause privacy disclosure and some risks. This paper aims to explore what factors and how those factors affect peopleā€™s personal information disclosure intention in OHCs. Based on ā€œrisk-motivationā€ perspective, we identify perceived usefulness as extrinsic motivation and social support as intrinsic motivation, and distinguish four kinds of risks to test those motivation and risk factorsā€™ effects on peopleā€™s personal information disclose intention in OHCs. As two constructs describing the characteristics of OHCs, expected disease severe extent and common identity are supposed having moderating effectsā€™ on motivation and risk factorsā€™ effects. The theoretical contribution of this paper is offering a model to explain peopleā€™s personal information disclose intention in OHCs and integrate constructs to describe the characteristic of OHCs; the practical implications is providing insight on OHC managersā€™ operation for communitiesā€™ viability and peopleā€™s privacy protection. Finally, limitations and future works also are presented

    Water uptake in parallel fractures

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    Ā Ā Ā Water uptake in rock fractures caused by rainfall plays a signiļ¬cant role in slope stability analysis. Since the fracture network system has complicated structures and multiple scales, the models based on the averaged system cannot account for these properties. On the other hand, a model describing a single fracture with fractal characteristics and surface roughness fails to deal with the case of multiple fractures at spatial scales. In this study, a fracture-network model is established to account for the complex structures and multiple scales of fractures. By considering the connectivity between fractures and the limited area of aquifer, capillary pressure formulations in different fractures are derived based on the Young-Laplace equation, and the ļ¬nal water level under speciļ¬c rainfall conditions is also obtained. The cross-section shapes and exhaust conditions of rainwater inļ¬ltration have important inļ¬‚uences on the ļ¬nal water level. The results indicate that the ļ¬nal water level is proportional to the ratio of perimeter to cross-section area when the fracture is a cylinder, and a circular pipe can reduce water level elevation in the fracture system.Cited as: Wang, J., Zhu, X., Pan, Y., Kou, J., Sun, S. Water uptake in parallel fractures. Capillarity, 2021, 4(1): 1-12, doi: 10.46690/capi.2021.01.0

    Silicene Nanomesh

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    Similar to graphene, zero band gap limits the application of silicene in nanoelectronics despite of its high carrier mobility. By using first-principles calculations, we reveal that a band gap is opened in silicene nanomesh (SNM) when the width W of the wall between the neighboring holes is even. The size of the band gap increases with the reduced W and has a simple relation with the ratio of the removed Si atom and the total Si atom numbers of silicene. Quantum transport simulation reveals that the sub-10 nm single-gated SNM field effect transistors show excellent performance at zero temperature but such a performance is greatly degraded at room temperature
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