| 1. |
- Liu, Wenlong, et al.
(author)
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On the calculation of electric diffusion coefficient of radiation belt electrons with in situ electric field measurements by THEMIS
- 2016
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In: Geophysical Research Letters. - 0094-8276 .- 1944-8007. ; 43:3, s. 1023-1030
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Journal article (peer-reviewed)abstract
- Based on 7years' observations from Time History of Events and Macroscale Interactions during Substorms (THEMIS), we investigate the statistical distribution of electric field Pc5 ULF wave power under different geomagnetic activities and calculate the radial diffusion coefficient due to electric field, , for outer radiation belt electrons. A simple empirical expression of is also derived. Subsequently, we compare to previous D-LL models and find similar Kp dependence with the model, which is also based on in situ electric field measurements. The absolute value of is constantly higher than , probably due to the limited orbital coverage of CRRES. The differences between and the commonly used and models are significant, especially in Kp dependence and energy dependence. Possible reasons for these differences and their implications are discussed. The diffusion coefficient provided in this paper, which also has energy dependence, will be an important contributor to quantify the radial diffusion process of radiation belt electrons.
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| 2. |
- Wu, Yue, et al.
(author)
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Photoswitching between black and colourless spectra exhibits resettable spatiotemporal logic
- 2016
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In: Materials Horizons. - : Royal Society of Chemistry. - 2051-6347 .- 2051-6355. ; 3:2, s. 124-129
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Journal article (peer-reviewed)abstract
- Logic is the key to computing. Traditionally, logic devices have been fabricated by the top-down approach, whose dimensions are drastically limited. The ultimate goal is to use molecular tailorability to design logics using the "bottom-up'' approach. Here we report an unprecedented photochromic molecule that undergoes unimolecular logic switching when excited anywhere in the entire UV-visible spectrum, thus a bottom-up, all-photonic, molecular logic gate. Specifically, these molecular photonic logics embedded in the polymer thin films function as the "AND'' or "OR'' gate at different temporal responses. To achieve high information-processing density, moreover, a ternary flip-flap-flop gate is realized in the molecular logic because the fact that this photochromic molecule can be photoswitched anywhere in its UV-vis spectrum enabled three different lasers (532, 473, and 561 nm) as the inputs to deliver the complex logic optical outputs.
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