980,237 research outputs found

    Dr. Ford\u27s Palindromia

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    Dr. Nemo W. Ford is not exactly at the forefront of human sexuality research in this country. Rather, his work is somewhat on the fringe of accepted practices and clinical techniques. With a \u27Dr. of Women\u27 degree from the University of Californication, he has investigated the intricacies of modern American sexual behavior for several years

    Volume 5, Number 6 - March 1925

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    The Alembic - Volume 5, Number 6 - March 1925. Full Issue, 55 pages including covers and advertisements. Contents: O\u27Connor, W. Harold, Ode to Thomas Moore Curran, Robert E., In Behalf of the Constitution Jordan, Reverend John A., O.P. Hayes, John J., Winds O\u27Connor, W. Harold, Nerve Rubba, John V., Lacrymona\u27s Death Song McEntee, Edward M., Defensio Antiquitatum O\u27Connor, W. Harold, What\u27s in a Name McGonagle, J.C., Lady of My Dreams McCormick, John L., Cedric Caps the Climax Barry, T. Henry, The Observer Fitzpatrick, John J., Residuum Editorials Reilley, Walter F., College Chronicle Ford, Earle F., Alumni Conlon, James C., Exchange Norton, Vernon C., Athletic

    Parallel Metric Tree Embedding based on an Algebraic View on Moore-Bellman-Ford

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    A \emph{metric tree embedding} of expected \emph{stretch~α≄1\alpha \geq 1} maps a weighted nn-node graph G=(V,E,ω)G = (V, E, \omega) to a weighted tree T=(VT,ET,ωT)T = (V_T, E_T, \omega_T) with V⊆VTV \subseteq V_T such that, for all v,w∈Vv,w \in V, dist⁥(v,w,G)≀dist⁥(v,w,T)\operatorname{dist}(v, w, G) \leq \operatorname{dist}(v, w, T) and operatornameE[dist⁥(v,w,T)]≀αdist⁥(v,w,G)operatorname{E}[\operatorname{dist}(v, w, T)] \leq \alpha \operatorname{dist}(v, w, G). Such embeddings are highly useful for designing fast approximation algorithms, as many hard problems are easy to solve on tree instances. However, to date the best parallel (polylog⁥n)(\operatorname{polylog} n)-depth algorithm that achieves an asymptotically optimal expected stretch of α∈O⁥(log⁥n)\alpha \in \operatorname{O}(\log n) requires Ω⁥(n2)\operatorname{\Omega}(n^2) work and a metric as input. In this paper, we show how to achieve the same guarantees using polylog⁥n\operatorname{polylog} n depth and O~⁥(m1+Ï”)\operatorname{\tilde{O}}(m^{1+\epsilon}) work, where m=∣E∣m = |E| and Ï”>0\epsilon > 0 is an arbitrarily small constant. Moreover, one may further reduce the work to O~⁥(m+n1+Ï”)\operatorname{\tilde{O}}(m + n^{1+\epsilon}) at the expense of increasing the expected stretch to O⁥(ϔ−1log⁥n)\operatorname{O}(\epsilon^{-1} \log n). Our main tool in deriving these parallel algorithms is an algebraic characterization of a generalization of the classic Moore-Bellman-Ford algorithm. We consider this framework, which subsumes a variety of previous "Moore-Bellman-Ford-like" algorithms, to be of independent interest and discuss it in depth. In our tree embedding algorithm, we leverage it for providing efficient query access to an approximate metric that allows sampling the tree using polylog⁥n\operatorname{polylog} n depth and O~⁥(m)\operatorname{\tilde{O}}(m) work. We illustrate the generality and versatility of our techniques by various examples and a number of additional results

    Volume 5, Number 1 - October 1924

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    Volume 5, Number 1 - December 1924. 31 pages including covers and advertisements. Contents Carroll, Thomas P., A Night Prayer Address of John E. Doneley, M.D. Lynch, James H., Indian Summer O\u27Connor, W. Harold, Faltering Love C. Conlon, James, Columbus Curran, Robert E., Ignoring the Franchise Carroll, Thomas P., An Antique Shop Barry, T. Henry, The Observer The Hotchpotch Editorials Fitzpatrick, John J., College Chronicle Ford, Earl F., Alumni Conlon, James C., Exchange Norton, Vernon C., Athletic

    Decoherence at zero temperature

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    Most discussions of decoherence in the literature consider the high-temperature regime but it is also known that, in the presence of dissipation, decoherence can occur even at zero temperature. Whereas most previous investigations all assumed initial decoupling of the quantum system and bath, we consider that the system and environment are entangled at all times. Here, we discuss decoherence for a free particle in an initial Schr\"{o}dinger cat state. Memory effects are incorporated by use of the single relaxation time model (since the oft-used Ohmic model does not give physically correct results)

    The Casimir spectrum revisited

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    We examine the mathematical and physical significance of the spectral density sigma(w) introduced by Ford in Phys. Rev. D38, 528 (1988), defining the contribution of each frequency to the renormalised energy density of a quantum field. Firstly, by considering a simple example, we argue that sigma(w) is well defined, in the sense of being regulator independent, despite an apparently regulator dependent definition. We then suggest that sigma(w) is a spectral distribution, rather than a function, which only produces physically meaningful results when integrated over a sufficiently large range of frequencies and with a high energy smooth enough regulator. Moreover, sigma(w) is seen to be simply the difference between the bare spectral density and the spectral density of the reference background. This interpretation yields a simple `rule of thumb' to writing down a (formal) expression for sigma(w) as shown in an explicit example. Finally, by considering an example in which the sign of the Casimir force varies, we show that the spectrum carries no manifest information about this sign; it can only be inferred by integrating sigma(w).Comment: 10 pages, 4 figure

    Volume 5, Number 8 - May 1925

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    Volume 5, Number 8 - May 1925. 55 pages including covers and advertisements. Contents Ferris, Richard, Longing O\u27Connor, W. Harold, The Master of St. Thomas Rocco, Joseph, Piper of Dreams Graham, John A., Here I Am Hayes, John J., Madness or Content? Ford, Earle F., Our Chinese System O\u27Connor, W. Harold, Confidences Hayes, John J., Memories Will Return Barry, T. Henry, The Observer Fitzpatrick, John J., Residuum Editorials Ford, Earle F., Alumni Conlon, James C., Exchange Norton, Vernon C., Athletic

    The Public Papers of Governor Wendell H. Ford, 1971-1974

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    This volume presents a record of the Ford administration. From among the many public speeches delivered by Wendell Ford during the three years he served as Governor, W. Landis Jones has chosen a representative sample that reflects the wide-ranging concerns of the Ford administration. Arranged topically, the volume covers subjects from government reorganization and party politics to health and welfare, education, highways, and energy and environment. This selection does not include executive orders or proclamations, since they are part of the preserved public record. The cross section of public speeches and press releases that are included provides an easily accessible source for historians to view the broad spectrum of issues that faced the people of the Commonwealth during the early years of the 1970s. Included also are appendixes that provide a complete listing of speeches delivered by Governor Ford during his term of office, a chart that shows the organization of Kentucky government at the end of the Ford administration, and a synopsis of the administration by Thomas L. Preston. W. Landis Jones is Professor of Political Science at the University of Louisville.https://uknowledge.uky.edu/upk_political_science_papers/1012/thumbnail.jp

    Hecimovich is Part of Second Class of W. E. B. Du Bois Research Institute Fellows

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    Hecimovich is one of four educators selected for a Sheila Biddle Ford Fellowship appointment among an incoming class of 23 Fellows for 2014-15. The Sheila Biddle Ford Fellowship is intended to bring “emerging as well as established scholars, writers, and artists to the W. E. B. Du Bois Research Institute.
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