Nowadays, mankind faces increasingly energy crisis and electromagnetic radiation pollution. An energy harvester with function of protecting human health from electromagnetic radiation is a desirable solution to this problem. Here, a stretchable electromagnetic shielding hybrid nanogenerator (ES-HNG) is reported which can not only scavenge thermal and mechanical energy from living environment but also protect and monitor human health. The ES-HNG is capable of transforming mechanical and thermal energy to electricity based on triboelectric, piezoelectric, and pyroelectric effects. To be devised as a computer keyboard cover, ES-HNG takes about 200 s to charge a capacitor to 3 V by typing. The stored energy can drive the portable devices successfully. Besides, the ES-HNG eliminates electromagnetic radiation of computer completely due to its unique electromagnetic shielding property. A large range of electromagnetic wave (frequency is between 0 and 1.5 GHz) is shielded more than 99.9978% by the ES-HNG. Moreover, the ES-HNG is able to monitor human health by attaching it on human abdomen to be a self-powered sensor. This work opens up a new prospect of harvesting energy effectively as well as protecting/monitoring human health from electromagnetic radiation surroundings. as human motions, which plays an important role with respect to wearable electronics. [3][4][5][6][7][8][9] However, the power output from the TENG is not enough to actuate most of wearable electronics. Therefore, hybrid nanogenerators (HNGs) which integrate TENGs with other nanogenerators were developed to solve the problem of low output. The developed HNGs can simultaneously/individually scavenge the mechanical and thermal energy from the living environment efficiently. [10][11][12][13][14] As a crucial candidate to a part of HNG, pyroelectric-piezoelectric nanogenerator (PPENG) which based on poly(vinylidene fluoride) (PVDF) scavenges thermal energy with a temperature gradient and mechanical energy from environment efficiently. [15][16][17] Occasionally, the HNG serves as a self-powered monitor by utilizing the triboelectric, piezoelectric, and pyroelectric effects. [18][19][20] However, the simple stacking of the PPENG with the TENG seriously restricted application of HNG. On the other hand, electromagnetic radiation has become a serious pollution issue which threatens human health. [21,22] Epidemiological surveys have proved that excessive amounts of electromagnetic radiation can cause extensive biological damage effects especially for the pregnant women. [23][24][25] However, most conventional antielectromagnetic radiation equipments are cumbersome and cannot function well in the GHz range. A good solution for the problem is developing electronics which are wearable and portable to be antielectromagnetic. Above all, a new type wearable and portable HNG is much desired, which includes wide electromagnetic shielding range. DOIHere in this work, we developed a stretchable, portable, and wearable electromagnetic shielding HNG (ES-HNG) which composed...

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Contemporary Chinese artists have long been marginalized in China as their ideas conflict with the mainstream political ideology. In Beijing, artists often live on the fringe of society in "artist villages," where they almost always face the threat of being displaced owing to political decisions or urban renewal. However, in the past decade, the Chinese government began to foster the growth of contemporary Chinese arts and designated underground artist villages as art districts. This article explores the profound change in the political decisions about the art community. It argues that, despite the pluralization of Chinese society and the inroads of globalization, the government maintains control over the art community through a series of innovative mechanisms. These mechanisms create a globalization firewall, which facilitates the Chinese state in global image-building and simultaneously mitigates the impact of global forces on domestic governance. The article illuminates how the authoritarian state has adopted more sophisticated methods of governance in response to the challenges of a more sophisticated society.

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