320 research outputs found
Batty Stories: Ramblings with Gramdad
No full textBatty Stories is a biography of the author\u27s grandfather, Merle Batty. Found in this version are chapters on Merle\u27s time in the army and on his time teaching, plus miscellaneous stories from other parts of his life
Memory Walking with Urban Bush Women's <i>Batty Moves</i>
No full text Like the childhood songs and butt-shaking contests of Ghana, Batty Moves by the Brooklyn-based dance company Urban Bush Women celebrates the African American female form. The choreographer and the dancers share their memories of butt-tucking ballet classes, and the author shares her memory walk from Ghana to black America. </jats:p
Design as collective action
No full textIn this paper a model of the design process based on finite Markov processes is elaborated and extended in the context of a theory of collective action. The interpretation developed here is based on the notion that design is a process of social problem solving within a small group or collectivity, and specific comparisons between the Markov model and Coleman's (1966) theory of collective decisionmaking are thus possible. The paper is introduced by a brief summary of previous work in design methods, and previous presentations of the model by the author (Batty, 1974a; 1974b) are summarized. The main extension to this model involves disaggregating relationships within the design process into actor interests and control over factors or events, and this leads quite naturally to two associated Markov processes which are consistently and unambiguously related in the steady state. The model is then used to reinterpret Coleman's theory which is developed in terms of the value of control and power, and this leads to some oblique insights into the relationship between the two theories. To demonstrate the use of the model a problem of locating conservation areas in Waterloo County, Ontario, is simulated, with the emphasis on the speed of convergence of the process and the prior and posterior distributions of power in the system. A brief excursion into Monte Carlo simulation is presented to test whether or not the same results could be generated randomly; finally, conclusions for further research are drawn together.
Solstice: An Electronic Journal of Geography and Mathematics, Volume XIX, Number 2
No full textThis document was delivered over the internet. The .zip file contains all static images, animated images, and text files.The purpose of Solstice is to promote interaction between geography and mathematics. Articles in which elements of one discipline are used to shed light on the other are particularly sought. Also welcome, are original contributions that are purely geographical or purely mathematical. These may be prefaced (by editor or author) with commentary suggesting directions that might lead toward the desired interaction. Contributed articles will be refereed by geographers and/or mathematicians. Invited articles will be screened by suitable members of the editorial board. IMaGe is open to having authors suggest, and furnish material for, new regular features.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/61417/1/win08.ziphttp://deepblue.lib.umich.edu/bitstream/2027.42/61417/3/win08.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/61417/5/SolsticeVolXIXNo2.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/61417/7/SolsticeVolXIXNo2.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/61417/8/2008Volume19_2024.zipDescription of SolsticeVolXIXNo2.pdf : Cover of JournalDescription of win08.zip : Solstice, December 2008. Full Journal.Description of win08.pdf : Solstice, December 2008, Full journal pdf with attached filesDescription of SolsticeVolXIXNo2.pdf : Cover fil
Discrete viscous sheets
No full text© Christopher Batty, Andres Uribe, Basile Audoly, Eitan Grinspun | ACM 2012. This is the author's version of the work. It is posted here for your personal use. Not for redistribution. The definitive Version of Record was published in ACM Transactions on Graphics, http://dx.doi.org/10.1145/2185520.2185609.We present the first reduced-dimensional technique to simulate the dynamics of thin sheets of viscous incompressible liquid in three dimensions. Beginning from a discrete Lagrangian model for elastic thin shells, we apply the Stokes-Rayleigh analogy to derive a simple yet consistent model for viscous forces. We incorporate nonlinear surface tension forces with a formulation based on minimizing discrete surface area, and preserve the quality of triangular mesh elements through local remeshing operations. Simultaneously, we track and evolve the thickness of each triangle to exactly conserve liquid volume. This approach enables the simulation of extremely thin sheets of viscous liquids, which are difficult to animate with existing volumetric approaches. We demonstrate our method with examples of several characteristic viscous sheet behaviors, including stretching, buckling, sagging, and wrinkling.This research is supported in part by the Sloan Foundation, the NSF (grants CMMI-11-29917, IIS-11-17257, IIS-10-48948, IIS- 09-16129, CCF-06-43268), and generous gifts from Adobe, Au- todesk, Intel, mental images, NVIDIA, Side Effects Software, and The Walt Disney Company. The first author is supported by a Bant- ing Postdoctoral Fellowship
Socioeconomic status as a risk factor for dementia death:individual participant meta-analysis of 86 508 men and women from the UK
No full textLife-course socioeconomic factors may have a role in dementia aetiology but there is a current paucity of studies. Meta-analyses of individual participant data would considerably strengthen this evidence base
Spectral conditions for stability of one-parameter semigroups
No full textLet {S(t): t≥0} be a C0-semigroup on a Banach space Y with generator B and {T(t): t≥0} be a bounded C0-semigroup on a Banach space X with generator A. Suppose that σ(B) ∩ iR is countable, Pσ(A*) ∩ iR is empty and that there is a bounded linear operator C: Y → X with dense range which intertwines the two semigroups. Then ∥T(t)x∥X → 0 as t → ∞, for each x in X. This generalises results of W. Arendt and the author, Yu. I. Lyubich and Vũ Quôc Phóng, and Falun Huang. © 1996 Academic Press, Inc
Antiprotonic atoms as a tool to study the nuclear periphery
No full textTwo different methods were employed by the collaboration PS209 at LEAR (CERN) to investigate the nucleon density at the outer nuclear periphery. The first one was the comparison of the yield of (N-1) nuclei and (Z-1) nuclei produced by antiproton annihilation on a nucleus with mass number A (here N and Z denote the neutron and proton number of the nucleus, respectively); the second one is the measurement of widths and shifts of the last observable transitions in antiprotonic atoms. Earlier studies of (A-1) production were extended by measurements of short-lived isotopes (lifetimes down to a few seconds). More than thirty widths and twenty shifts were extracted from the antiprotonic X-ray data. The results fit nicely into the systematics established recently by C.J. Batty, E. Friedman, and A. Gal (1995). Pronounced isotope effects were found for some of the investigated elements. (11 refs)
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