As in Western nations, CAM use is prevalent among dermatology patients in Taiwan: not only the traditionally popular Chinese CAM, but also Western CAM. With CAM being popular in the younger age group, dermatologists will likely encounter more CAM users in the future. Because some CAM may produce serious side-effects, dermatologists need to help and guide patients to assess the benefits and dangers of using CAM to treat dermatological conditions.
As a wide-reaching institutional reform, China's fiscal decentralization was launched in the early 1980s to encourage provincial economic growth by granting more financial autonomy to provincial governments. In this paper, the impact of fiscal decentralization on China's environmental quality is investigated both theoretically and empirically. A neoclassical model is developed based on the primary characteristics of China's fiscal decentralization. Using provincial panel data for the period 1995-2015, a two-equation regression model is employed to empirically verify the three propositions of the theoretical model: (1) there exists an inverted-U shaped relationship between fiscal decentralization and GDP per capita; (2) fiscal decentralization is positively related to GDP per capita at the steady state; (3) there is an inverted-U shaped Environmental Kuznets Curve relationship between pollution emissions and economic growth.
We report the high capacity, superior rate capability,
and excellent
cyclic stability of graphene nanosheets (GNs) decorated with Co3O4 nanoparticles as anodes in Li-ion batteries.
A pulse microwave-assisted (MA) polyol method (total period: 30 min)
is adopted to deposit cobalt oxides onto the GNs in water and ethylene
glycol (EG), forming two types of Co3O4@GN hybrids.
The selection of solvent in the MA process plays a central role in
affecting the crystallinity, dispersion, and particle size of cobalt
oxide particles. The resulting Co3O4@GN hybrid,
prepared by the MA method in EG, shows a homogeneous dispersion of
Co3O4 nanocrystals with an average size of 10
nm. The Co3O4@GN hybrid displays advantages
of high reversible capacity, excellent cycleability, and high rate
capability. This improved cyclic performance can be attributed to
the formation of a three-dimensional GN framework decorated with Co3O4 nanocrystals, leading to fast diffusion of Li
ions (diffusion coefficient: 5.82 × 10–12 cm2 s–1) and low internal resistance (equivalent
series resistance: 92.2 Ω) determined by electrochemical impedance
spectroscopy. With its ease of MA fabrication and good performance,
the Co3O4@GN hybrid will hold promise in practical
Li-ion batteries.
The in-plane (kip) and through-plane (ktp) thermal conductivities of heat sinks using carbon nanotubes (CNTs), graphene nanosheets (GNs), and CNT/GN composites are extracted from two experimental setups within the 323-373 K temperature range. Hierarchical three-dimensional CNT/GN frameworks display higher kip and ktp values, as compared to the CNT- and GN-based heat sinks. The kip and ktp values of the CNT/GN-based heat sink reach as high as 1991 and 76 W m(-1) K(-1) at 323 K, respectively. This improved thermal conductivity is attributed to the fact that the hierarchical heat sink offers a stereo thermal conductive network that combines point, line, and plane contact, leading to better heat transport. Furthermore, the compression treatment provided an efficient route to increase both kip and ktp values. This result reveals that the hierarchical carbon structures become denser, inducing more thermal conductive area and less thermal resistivity, i.e., a reduced possibility of phonon-boundary scattering. The correlation between thermal and electrical conductivity (ε) can be well described by two empirical equations: kip = 567 ln(ε) + 1120 and ktp = 20.6 ln(ε) + 36.1. The experimental results are obtained within the temperature range of 323-373 K, suitably complementing the thermal management of chips for consumer electronics.
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