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We construct several families of Artin-Schelter regular algebras of global dimension four using double Ore extension and then prove that all these algebras are strongly noetherian, Auslander regular, Koszul and Cohen-Macaulay domains. Many regular algebras constructed in the paper are new and are not isomorphic to either a normal extension or an Ore extension of an Artin-Schelter regular algebra of global dimension three.

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In what ways are lifestyles in urbanising Thailand, increasingly oriented towards shopping malls related to the threat to the wildlife and struggles for subsistence in distant Lao hinterlands? Our article answers this question by looking at the workings of electricity as the key infrastructure that connects these seemingly unrelated events and practices. We argue that the circulation of electricity flows along uneven channels, shifting injury and environmental harm across international borders. This circuit is perpetuating inequality and environmental injustice in the Lower Mekong. To demonstrate this claim, we analyse the electricity sector at numerous scales and locationsthe urban scale in Bangkok, the country scale of Thailand and then Laos and the local community scale in Laos. We then discuss by what means various material and social processes and actors at these different scales form this circuit. Looking at circuits of power allows us to link the story of electricity consumption with that of production, with an emphasis on their extraterritoriality, multiplicity and boundaries. Our findings illustrate the effects of this circuit on spaces far from a thought-of urban area. Furthermore, we demonstrate the ways in which these effects have produced inequality and injustice across borders.

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