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Canadian curator Keith Wallace on Havana-based artists presented in his Vancouver-based exhibition at the Belkin Gallery. [ABSTRACT FROM AUTHOR]

Preferential accumulation of minerals with high densities forming placer deposits in longitudinal bars of braided rivers relies on the segregation of this denser material from the quartz and feldspar sands dominating sediment in transport. Flume experimentation conducted on mixtures of quartz, pyroxene, magnetite, and lead sand transported over rough cobble beds demonstrated that the sand distribution was more uniform above the bed than theory predicted. The deviation from theory was inversely proportional to the density of the mineral. Fall velocity was not a good predictor of the amount of a mineral species carried in suspension, as coarse-grained quartz dominated the suspension population in the flume runs where lead was a major constituent in the traction population, even though the quartz had a greater fall velocity. Applying these results to placer deposits indicates that during flood events, even the smaller dense minerals and especially the super-dense minerals will be transported with the gravel and cobble load, whereas the quartz and feldspar will be spatially segregated during transport and temporally and spatially segregated during deposition. This mechanism of placer formation is capable of creating the types of deposits present in orebodies and showings such as the uraniferous paleoplacers at Elliot Lake, Canada, and the gold-bearing longitudinal bars in the Witwatersrand. [ABSTRACT FROM AUTHOR]

Induced voltage and current in a deenergized transmission line caused by other lines nearby can be caused by electric-field and magnetic-field induction. These voltages and currents present a serious work hazard for line-crew personnel. Proper understanding of the phenomenon involved and identification of the associated hazards are necessary to safely perform deenergized line work. The purpose of this paper is to clarify some of the misconceptions that have been prevalent in the industry for many years as well as to expand on the test data available in literature. This paper discusses, in simple terms, the relevant parameters that affect the magnitude of the induced voltage and current as well as the work hazards they create. [ABSTRACT FROM AUTHOR]

An introduction is presented in which the editor discusses various reports within the issue on topics including recipients of Yishu Awards for critical writing and curating on contemporary Chinese art, and alternative or independent artistic and curatorial practices and exhibition spaces.

An introduction to articles published within the issue is presented, including the works of a diversity of Chinese artists, such as Zheng Chongbin and Wei Jia, whose aesthetics and ideas navigate between the East and West, another on artists known for their innovative approaches to the tradition of ink painting, and an interview with artist Sun Yuan.

An introduction is presented in which the editor discusses various reports within the issue on Chinese artists that include Liu Ding, Wang Wo and Zhang Dali.

An introduction is presented in which the editor discusses various reports within the issue on topics including an interview with Chinese artist Ai Weiwei, the use of traditional assembly halls by photographers Shao Yinong and Muchen, and wall and stone tablet messaging by photographer He Chongyue.

An introduction is presented in which the editor discusses the contents within the issue on topics including the sculpture of Gao Brothers, distinction in Hong Kong painting between different artists and difference between various depictions of the phenomenon of Three Gorges Dam.

An obituary for British chiropodist Tim Shaw is presented.