The age and origin of the central Scotia Sea

Opening of the Drake Passage gateway between the Pacific and Atlantic oceans has been linked in various ways to Cenozoic climate changes. From the oceanic floor of Drake Passage, the largest of the remaining uncertainties in understanding this opening is in the timing and process of the opening of the central Scotia Sea. All but one of the available constraints on the age of the central Scotia Sea is diagnostic of, or consistent with, a Mesozoic age. Comparison of tectonic and magnetic features on the seafloor with plate kinematic models shows that it is likely to have accreted to a mid-ocean ridge between the South American and Antarctic plates following their separation in Jurassic times. Subsequent regional shallowing may be related to subduction-related processes that preceded backarc extension in the East Scotia Sea. The presence of a fragment of Jurassic–Cretaceous ocean floor in the gateway implies that deep water connections through the Scotia Sea basin complex may have been possible since Eocene times when the continental tips of South America and the Antarctic Peninsula first passed each other

Graduate recital: perspective and analysis: an overview of Morton Feldman's The King of Denmark, Michael Gordon's XY, and Jacob Druckman's Reflections on the Nature of Water

Master's Project (M.Mu.) University of Alaska Fairbanks, 201

Three small systems showing probable room-temperature superconductivity

I shall discuss three small systems in which I think room-temperature superconductivity has been observed. These are: 1. Narrow channels through films of oxidised atactic polypropylene (OAPP) and other polymers. 2. Some multiwalled carbon nanotubes or mats of nanotubes. 3. Sandwich structures based on CdF_2. The main emphasis will be on polymer films.Comment: 8 pages. Physica C, to be published. Changes from v2: Journal of publication added. Two sentences added on both page 1 and page 6. Three references adde

The historiography of the Black Panther party

This article examines forty years of historical writing on the Black Panther Party (BPP), arguing that this historiography has now reached maturity. It evaluates key publications on the BPP, splitting the historiography into three periods. The first phase, the article asserts, was dominated by accounts written by participants and observers of the BPP in action. These offered insight into the personalities of the BPP leadership but included relatively little on other BPP members. They were supplemented by a collection of friendly academic studies, a number of which emphasized the role of the FBI in precipitating the BPP's decline. The article identifies the 1994 publication of Hugh Pearson's biographical study of Huey P. Newton as the beginning of a second phase. Pearson's work, which built on a collection of accounts written by observers and right-wing writers during the first phase, precipitated an outpouring of new studies that opposed its conclusions. These works overwhelmingly focussed on individual BPP chapters and the experiences of the BPP rank and file; they were generally friendly towards the party and often appraised the BPP's actions through the 1970s. A second wave of participant accounts also emerged in this period which offered a more personal interpretation of the BPP's decline. A third period emerged in the early 2000s that abandoned the obsession with Pearson's study and focussed instead on the BPP's contribution to African American and American culture beyond its political program and violent image. The article reveals the paradox at the heart of the local approach, one which recent studies addressed in their focus on the BPP's Oakland chapter and their return to a tight chronological approach that focussed on the BPP's peak years. It concludes by noting the remaining omissions in the BPP's historical record and anticipating further studie