2,705 research outputs found
Home of David Ritten House N.D.
No full textDigital image was created by scanning UMBC-made prints from original Bullock glass negatives.Handwritten in ink in center of verso: 808 Handwritten in ink in bottom left corner of verso: 84-01-249 'HOME OF DAVID RITTEN HOUSE' N.D. [c. 1912?
Home of David Ritten House N.D.
No full textDigital image was created by scanning UMBC-made prints from original Bullock glass negatives.Handwritten in ink in center of verso: 808 Handwritten in ink in bottom left corner of verso: 84-01-249 'HOME OF DAVID RITTEN HOUSE' N.D. [c. 1912?
David Bullock
No full textDavid Bullock and the Harding Memorial Gold Rail, Cedar City, Utah.Postcard
Bullock, David, NX28620
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/374636Surname: BULLOCK
Given Name(s) or Initials: DAVID
Military Service Number or Last Known Location: NX28620
Missing, Wounded and Prisoner of War Enquiry Card Index Number: 13404186011
Item: [2016.0049.06944] "Bullock, David, NX28620
Levins and the legitimacy of artificial worlds
No full textFor practitioners across a growing number of academic disciplines there is a strong sense that simulation models of complex realworld systems provide something that differs fundamentally from that which is offered by mathematical models of the same phenomena. The precise nature of this difference has been difficult to isolate and explain, but, occasionally, it is cashed out in terms of an ability to use simulations to perform “experiments”, e.g., [9]. The notion here is that empirical data derived from costly experiments in the real world might usefully be augmented with data harvested from the right kind of simulation models. We will reserve the term “artificial worlds” for such simulations. In this paper, rather than tackle the problems inherent in this type of claim head on, we will approach them obliquely by asking: what is the root of the attraction of constructing and exploring artificial worlds? By combining insights drawn from the work of Levins, Braitenberg, and Clark, we arrive at an answer that at least partially legitimises artificial worlds by allocating them a useful scientific role, without having to assign the status of empirical enquiry to their exploration
Wayne K. Bullock
No full textWayne K. Bullock, grandson of Thomas Bullock, early Utah pioneer, son of Seth Bullock, author of three books of poetry
Exploring adaptation with evolutionary activity plots
No full textEvolutionary activity statistics and their visualization are introduced, and their motivation is explained. Examples of their use are described, and their strengths and limitations are discussed. References to more extensive or general accounts of these techniques are provided
Review of \u3ci\u3eSeth Bullock: Black Hills Lawman\u3c/i\u3e by David A. Wolff
No full textIn this short biography of Seth Bullock, the first sheriff of Deadwood, South Dakota, David A. Wolff challenges a few of the myths surrounding a former frontier icon. Bullock did not in fact clean up Deadwood, Wolff concludes, nor did he single-handedly prevent skirmishes with nearby Lakotas. His role in establishing Yellowstone National Park was a greatly exaggerated part of his legend. And his reputation as a military man was mostly unwarranted; he spent most of the Spanish-American War in Georgia and never saw action.
In Wolff\u27s retelling, Bullock emerges as an opportunistic frontier capitalist more than anything else, someone who took advantage of political connections to protect his economic interests in the hardware business and mining. Relying primarily on newspaper accounts (Bullock\u27s letters, in private collections, were inaccessible to the author, making this biography less revealing than it might have been), Wolff describes Bullock\u27s first foray into politics in Montana; his move to Deadwood, where he would serve as sheriff and later manage a mining company; his tenure as supervisor of the Black Hills Forest Reserve, when he worked with Gifford Pinchot; and his close friendship, late in life, with Theodore Roosevelt. This biography also works as a short history of Deadwood itself. Wolff details the numerous challenges facing the town in its early years, including devastating fires and flooding, banking and mining failures, and its competition for the railroad
From continental thinning to sea-floor spreading : a geophysical study of rifted margins southwest of the UK
No full textGeophysical methods were used to examine the crustal structure of the Goban Spur and North Biscay margins and the evolution from rifting to sea-floor spreading processes. A 169 km wide-angle velocity model across the Goban Spur margin was produced and a 120 km wide region identified between undisputed oceanic crust and thinned continental crust, where velocities increase form 4.5 km s-1 to 6.8 km s-1 in the top 4 km beneath acoustic basement. At depth it can be divided into a region where a 1.5 km thick high velocity layer (7.2-7.6 km s-1) exists and a region where this layer is absent, but velocities of ~ 7 km s-1 are present. Wide-angle PmP arrivals are observed across the whole of the intermediate region, but a normal incidence reflection Moho is not present. The intermediate region is interpreted to consist of exhumed mantle where the high velocity layer is present and slow-spreading oceanic crust further seaward where this layer does not exist. The exhumed mantle region is 70 km wide, has a Poisson’s ratio < 0.34 at top basement and an extremely low topographic expression. The serpentinite content is estimated to decrease with depth from 100% at top basement to <25%, 5-7 km into basement. The observed magnetic anomaly is best fit by a thin, 1-1.5 km, layer of magnetisation 2-3 A m-1 and may be attributed to magnetite during a prolonged interaction of serpentinite with seawater. The region of slow-spreading oceanic crust is 50 km wide, consists of a series of basement ridges raised 400 m above the adjacent exhumed mantle and has a Poisson’s ratio of ~ 0.29 at top basement. Reprocessing and migration of multichannel seismic profiles across the North Biscay margin show that continental crust was thinned from > 24 km to ~ 3 km over a distance of ~ 200 km, at the expense of both upper and lower crust. Preferential thinning of the lower crust is evident in the gravity model and the disappearance of deep layered reflectivity.</p
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