Page composer to translate binary electrical data to optical form

Composer converts binary data to optical form for storage as hologram. Device consists of an array of deformable metal membranes controlled by MOSFET's. Device is fast, produces high contrast ratios, does not degrade with extended use, and can be addressed from diverse angles

Random Networks Tossing Biased Coins

In statistical mechanical investigations on complex networks, it is useful to employ random graphs ensembles as null models, to compare with experimental realizations. Motivated by transcription networks, we present here a simple way to generate an ensemble of random directed graphs with, asymptotically, scale-free outdegree and compact indegree. Entries in each row of the adjacency matrix are set to be zero or one according to the toss of a biased coin, with a chosen probability distribution for the biases. This defines a quick and simple algorithm, which yields good results already for graphs of size n ~ 100. Perhaps more importantly, many of the relevant observables are accessible analytically, improving upon previous estimates for similar graphs

Thinking Globally, Mapping Locally: Styles and Discourse in Transatlantic Cartography

Maps have the special capacity to create and project spatial frameworks through both their physical and stylistic forms. The close study of maps as constructed objects re-centers the principle element of any art historical problem, relational thinking through visual culture. A cartographic representation examined as an element of its historical context can simultaneously articulate a specific perspective on a particular place, and reveal broader dialogues of which that viewpoint is one part. The articles brought together here examine a variety of local mappings contingent on more global thinking in the transatlantic world, from the colonial period to the twentieth century

Colonial Maps and a Cartographic Reckoning in Post-Revolutionary Mexico City

By the 20th century, 16th-century maps of Mexico City were not new, but their value was renewed by an urban elite grappling with the nation\u27s historical geography. The capital saw fresh developments, including modern architecture and industry, while early excavations offered glimpses of Aztec Tenochtitlan buried beneath. This stratigraphic tension necessitated a reckoning; of concern here is the way that visual and intellectual cultures engaged in a particular cartographic reckoning. Colonial maps filled a void as artists, architects, art historians, and others worked to reconcile Mexico City’s modern identity with its ancient foundations