248,350 research outputs found

    R. G. Gray

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    "29568 Cpl Gray R.G. 8 T M O Winnellie NT".29568 Corporal Gray, R.G. 8 Transportation and Movements Office, Winnellie, Northern Territory

    Existence and stability of multiple spot solutions for the Gray-Scott model in R^2$

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    Existence and Stability of Multiple Spot Solutions for the Gray-Scott Model in R2R^2 In this paper, we rigorously prove the existence and stability of multiple spot patterns for the Gray-Scott system in a two dimensional domain which are far from spatial homogeneity. The Green's function and its derivatives together with two nonlocal eigenvalue problems both play a major role in the analysis. We establish a threshold behavior for stability: If a certain inequality for the parameters holds then we get stability, otherwise we get instability of multiple spot solutions. The exact asymptotics of the critical thresholds are obtained

    Box 26-1, Neg. No. Unknown: W. R. Gray

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    This black and white photograph features a portrait of W. R. Gray - two photos of Mr. Gray in which he is wearing a suit. W. R. Gray ordered the photograph.https://scholars.fhsu.edu/stafford_county/3972/thumbnail.jp

    Two Letters to Cromwell Mortimer, [...] containing farther Accounts of his Experiments concerning Electricity, 1732.

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    GRAY, Stephen. "Two Letters from Mr. Stephen Gray, F. R. S. to C. Mortimer, M. D. Secr. R. S., containing Farther Accounts of His Experiments concerning Electricity", Philosophical Transactions of the Royal Society, 1731-1732, 37, pp. 397-407

    Box 26-1, Neg. No. Unknown: W. R. Gray and Unidentified Woman

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    This black and white photograph features a portrait of W. R. Gray - he is wearing a suit; the other shows his daughter Jessie Gray wearing a dark colored dress. W.R. Gray ordered the photograph.https://scholars.fhsu.edu/stafford_county/3973/thumbnail.jp

    A Letter to Cromwell Mortimer, [...] containing several Experiments concerning Electricity, 1730.

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    GRAY, Stephen. "A Letter to Cromwell Mortimer, M. D. Secr. R. S., containing several Experiments concerning Electricity ; by Mr. Stephen Gray.", Philosophical Transactions of the Royal Society, 1731-1732, 37, p. 18-44

    Existence and stability of multiple spot solutions for the gray-scott model in R^2

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    We study the Gray-Scott model in a bounded two dimensional domain and establish the existence and stability of {\bf symmetric} and {\bf asymmetric} multiple spotty patterns. The Green's function and its derivatives together with two nonlocal eigenvalue problems both play a major role in the analysis. For symmetric spots, we establish a threshold behavior for stability: If a certain inequality for the parameters holds then we get stability, otherwise we get instability of multiple spot solutions. For asymmetric spots, we show that they can be stable within a narrow parameter range

    [Letter from R. E. Gray to C. C. Cox, October 6, 1896]

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    Letter from R. E. Gray to C. C. Cox discussing the potential sale of some land and a description of the plot. The envelope is included

    Box 50, Neg. No. NA: Gray Family

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    This black and white photograph features a portrait of the Gray family - four pictures of two women, one girl, two men and one boy. There is some damage on the negative seen in these images. W. R. Gray ordered the photograph. The man with the light mustache is W. R. Gray. The woman wearing the print dress is his wife, Mary (Tipton) Gray.https://scholars.fhsu.edu/stafford_county/6762/thumbnail.jp

    Box 50, Neg. No. : Cecil Gray

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    This black and white photograph features a portrait of Cecil Gray - he is wearing a light dress and is sitting on a wicker chair. Cecil Gray ordered the photograph. Cecil Gray was one of W. R. Gray\u27s children.https://scholars.fhsu.edu/stafford_county/6761/thumbnail.jp
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