Chao Yuen Ren (1892–1982)

Y. R. Chao is easily the most famous linguist to have come out of China. Born before the end of the last dynasty in China, he received a traditional Confucian education, but was also one of the first Chinese people to be sent to the West for training in modern Western science (under the Boxer Indemnity Fund). The remarkable breadth and scope of his studies included physics, mathematics, linguistics, musical and literary composition, and translation, and he was a pioneer in many of these fields

Qualitative picture of a new mechanism for high-Tc superconductors

Xu et al. observed enhanced Nernst effect and Iguchi et al. observed patched diamagnetism, both well above $T_c$ in underdoped high-$T_c$ superconductors (HTSCs). A new mechanism is proposed here, which seems to naturally explain, at least qualitatively, these observations, as well as the d-wave nature and continuity of pseudogap and pairing gap, the tunneling conductance above $T_c$, as well as $T^*(x)$, $T_{\nu}(x)$, $T_c(x)$, etc. This mechanism combines features of dynamic charged stripes, preformed pairs, and spin-bags: At appropriete doping levels, the doped holes (and perhaps also electrons) will promote the formation of anti-phase islands in short-range anti-ferromagnetic order. On the boundary of each such island reside two doped carriers; the unscreened Coulomb repulsion between them stabilizes its size. Superconductivity results when such ``pre-formed pairs'' Bose-condense.Comment: 8 pages, 4 figures, New3SC-4 Conference Proceedings, to be published in ijmp

Socially engaged architecture in a Chinese rural village: Xihe Village Community Centre, 2014

This paper attempts to explore the social production of architecture in contemporary Chinese rural villages through a case study on the Community Centre in Xihe Village. This community project, designed and built in 2014, exemplifies a lesser-known type of Chinese architectural practice engaging in a local and specific context, which suddenly gave participation a dramatic image in current breakneck Chinese rural-urban transition of large scale and rapid speed. By looking at this highly specific case through a detailed description and critical evaluation, this paper takes this participatory architectural project as the very first critical example of the socially-engaged architecture in China; as presenting an alternative architecture of resistance in response to the top-down guiding principle ‘Construction of A New Socialist Countryside’ launched by the government in 2005. Source material was collected through fieldwork in the village, including observational study, photographic documentation, and intensive formal and informal interviews with practitioners, authorities, and villagers. The analysis emphasizes the social process and consequences of different stages of this building, in order to explore hidden potentials and methodologies tailoring the architectural design and construction to the site-specificity. The social consequence of the building process is much more important than the object produced. By investigating the architectural version within a broader framework combining anthropology and activism, the paper attempts to introduce a more socially resilient way of making architecture in the current Chinese rural-urban transition. On the one hand it addresses the contingencies in working with underprivileged village communities in inner rural China, which have scarce resources and fragile identities; on the other hand it cuts through the surface of rural vernacular China to expose the undercurrent of silent issues in architecture that constitute the indigenous, the everyday, resistance, transition, and resilience

On the probability that self-avoiding walk ends at a given point

We prove two results on the delocalization of the endpoint of a uniform self-avoiding walk on Z^d for d>1. We show that the probability that a walk of length n ends at a point x tends to 0 as n tends to infinity, uniformly in x. Also, for any fixed x in Z^d, this probability decreases faster than n^{-1/4 + epsilon} for any epsilon >0. When |x|= 1, we thus obtain a bound on the probability that self-avoiding walk is a polygon.Comment: 31 pages, 8 figures. Referee corrections implemented; removed section 5.

Xiang Ren on reading grassroots architecture in Beijing’s conservation area - Hutong Mushroom By Han Li and Qiuye Jin

A review of ‘Hutong Mushroom,’ a highly illustrated architectural and ethnographical survey of the contemporary informal buildings and structures which coexist within the traditional fabric of courtyard houses in Beijing