520 research outputs found

    Authorisation in Grid Computing

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    This paper briefly surveys how authorisation in Grid computing has evolved during the last few years, and presents the latest developments in which Grid applications can utilise a policy controlled authorisation infrastructure to make decisions about which users are allowed to perform which actions on which Grid resources. The paper describes the Global Grid Forum SAML interface for connecting policy based authorisation infrastructures to Grid applications, and then describes the PERMIS authorisation infrastructure which has implemented this interface. The paper concludes with suggestions about how this work will evolve in the future

    Il logos inciso nell'argilla. Ricordo di John Chadwick

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    On the centenary of the birth of John Chadwick (who, together with Michael Ventris, deciphered the Cretan script "Linear B"), the author, who knew him personally and corresponded with him, reconstructs and relates unpublished aspects of how Chadwick arrived at his discoveries, thanks to his military decryption experiences during the Second World War. Philosophy had flourished on Greek soil several centuries after Linear B, yet we cannot help but recognise that its basic constituent, the logos, the word as the expression of (future) thought, was indeed born on the clay tablets of Crete.Nel centenario della nascita di John Chadwick (il quale decifrò insieme a Michael Ventris la scrittura cretese “Lineare B”), l’autore, che lo conobbe personalmente ed ebbe con lui uno scambio epistolare, ricostruisce e riferisce aspetti inediti di come Chadwick giunse alle sue scoperte, grazie a esperienze di decrittazione militare risalenti alla Seconda Guerra Mondiale. La filosofia era fiorita sul suolo greco diversi secoli dopo la Lineare B, eppure non possiamo fare a meno di riconoscere che il suo costituente basilare, il logos, la parola in quanto espressione del pensiero (futuro), era davvero nato sulle tavolette d’argilla di Creta

    Leonard Street Orphan Home and Chadwick Home and School, Scrapbook One, circa 1926

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    Leonard Street Orphan Home and Chadwick Home and School, Scrapbook One.The Leonard Street Orphans Home was founded in 1890, and orphans attended Spelman day school for free. Chadwick Hall was named for Amy Chadwick, director of the Leonard Street Orphans Home (1903-1936). For individual images with further description, search: "auc.050.1043".The Atlanta University Center Robert W. Woodruff Library acknowledges the generosity of the Digital Public Library of America for supporting in part the digitization of this collection as part of the Black Women's Suffrage Digital Collection, a project made possible through funding from Pivotal Ventures, A Melinda Gates Company

    Chadwick, Liverpool and the bomb.

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    The author intends to set out in this thesis Chadwick's scientific and diplomatic contribution to the development of the atomic bombs that ended World War Two. The far-reaching consequences of Chadwick's efforts to establish a nuclear physics research prograrmne, both academic and commercial, in austere post-war Britain are also shown. A brief history of Chadwick's academic career, at Manchester, Cambridge and Liverpool Universities is given, which indicate how his intimate knowledge of atomic and nuclear physics culminated in the building of a state-of-the-art 37" pole diameter cyclotron at Liverpool University. The help that Lawrence and his colleagues generously and freely gave to Chadwick is also acknowledged. The crucial role of the Liverpool cyclotron in determining the necessary nuclear fission cross-section measurements needed to establish the feasibility of an atomic bomb, is also discussed. Chadwick's precise and penetrating insight of the bomb's feasibility, was presented in the final Maud Report that was sent, prior to the bombing of Pearl Harbour, to the U.S.A. It was this Report that convinced the Americans that an atomic bomb was a feasible and obtainable objective and started, as a matter of urgency, American fission bomb research. A brief history of fission and the events surrounding its discovery is also presented, as is a comparative discussion on the German and Japanese progress in atomic bomb research in World War Two. It would not have been possible to give specific details of many of the above events without primary source material to substantiate them The author has located a large number of previously un-published letters, documents and photographs - only some of which have been included - but all of which are being incorporated into a Chadwick Archive at Liverpool University

    Leonard Street Orphan Home and Chadwick Home and School, Scrapbook Two, circa 1933

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    This scrapbook contains photographs, cards, ledgers, memorabilia, and brochures related to the Leonard Street Orphan Home and Chadwick Home and School.The Leonard Street Orphans Home was founded in 1890, and orphans attended Spelman day school for free. Chadwick Hall was named for Amy Chadwick, director of the Leonard Street Orphans Home (1903-1936). For individual images with further description, search: "auc.050.1044".The Atlanta University Center Robert W. Woodruff Library acknowledges the generosity of Pivotal Ventures, an investment and incubation company created by Melinda Gates and the Digital Library of America in supporting the digitization of this collection as part of the Race, Power, and Curation: Black Women's Suffrage Digital Collection.</em

    The Visit of General Washington to Newport in 1781

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    A paper read before the Society December 17th, 1912 by Mrs. French E. Chadwick. Bulletin of the Newport Historical Society, Number Six (extra number), Newport, R.I., February, 1913. Using original source material, the author discusses George Washington’s visit to Newport, Rhode Island, in order to confer with Count Rochambeau upon his arrival from France in 1780 to assist the American colonies in gaining their freedom from England.https://digitalcommons.providence.edu/ri_history/1018/thumbnail.jp

    Biennial message of Governor Stephen Fowler Chadwick to the Legislative Assembly of the state of Oregon: tenth regular session - 1878

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    This archived document is maintained by the Oregon State Library as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Title from sourceMode of access: Internet from the Oregon Government Publications Collection.Text in Englis
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