44 research outputs found

    Searching for gravitational waves from known pulsars

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    We present upper limits on the amplitude of gravitational waves from 28 isolated pulsars using data from the second science run of LIGO. The results are also expressed as a constraint on the pulsars' equatorial ellipticities. We discuss a new way of presenting such ellipticity upper limits that takes account of the uncertainties of the pulsar moment of inertia. We also extend our previous method to search for known pulsars in binary systems, of which there are about 80 in the sensitive frequency range of LIGO and GEO 600.Comment: Accepted by CQG for the proceeding of GWDAW9, 7 pages, 2 figure

    Search for Gravitational Waves from Primordial Black Hole Binary Coalescences in the Galactic Halo

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    We use data from the second science run of the LIGO gravitational-wave detectors to search for the gravitational waves from primordial black hole (PBH) binary coalescence with component masses in the range 0.2--1.0M1.0 M_\odot. The analysis requires a signal to be found in the data from both LIGO observatories, according to a set of coincidence criteria. No inspiral signals were found. Assuming a spherical halo with core radius 5 kpc extending to 50 kpc containing non-spinning black holes with masses in the range 0.2--1.0M1.0 M_\odot, we place an observational upper limit on the rate of PBH coalescence of 63 per year per Milky Way halo (MWH) with 90% confidence.Comment: 7 pages, 4 figures, to be submitted to Phys. Rev.

    Upper limits from the LIGO and TAMA detectors on the rate of gravitational-wave bursts

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    We report on the first joint search for gravitational waves by the TAMA and LIGO collaborations. We looked for millisecond-duration unmodelled gravitational-wave bursts in 473 hr of coincident data collected during early 2003. No candidate signals were found. We set an upper limit of 0.12 events per day on the rate of detectable gravitational-wave bursts, at 90% confidence level. From simulations, we estimate that our detector network was sensitive to bursts with root-sum-square strain amplitude above approximately 1-3×10 in the frequency band 700-2000 Hz. We describe the details of this collaborative search, with particular emphasis on its advantages and disadvantages compared to searches by LIGO and TAMA separately using the same data. Benefits include a lower background and longer observation time, at some cost in sensitivity and bandwidth. We also demonstrate techniques for performing coincidence searches with a heterogeneous network of detectors with different noise spectra and orientations. These techniques include using coordinated signal injections to estimate the network sensitivity, and tuning the analysis to maximize the sensitivity and the livetime, subject to constraints on the background

    The acid test of Ottomanism: the acceptance of non-Muslims in the late Ottoman bureauctacy.

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    Donated by Klaus KreiserReprinted from : Benjamin Braude; Bernard Lewis (eds.). Christians and Jews in the Ottoman Empire: The Functioning of a Plural Society Vol. 1, 1982

    Problems of educational democratization im an era of explosive population growth.

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    Donated by Klaus KreiserReprinted from : Journal of the Japan-Netherlands Institute, Vol. VI, 1996.; Papers of the third Conference on the Transfer of Science and Technology Between Europe and Asia since Vasco da Gama (1498-1998) İstanbul: October 28-30, 1994

    Lady Mary wortleymontagu and Fatma Aliye Hanım.

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    Donated by Klaus KreiserReprinted from : XI. Türk Tarih Kongresi (Ankara: 5-9 Eylül 1990), Kongreye Sunulan Bildiriler IV. Cilt-- Ankara: Türk Tarih Kurumu, 1994

    Turkey, Islam, Nationalism, and Modernity: A History, 1789-2007

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    Presentation requires Flash Player, RealPlayer, or Windows Media Player to view.The University Archives has determined that this item is of continuing value to OSU's history.Turkey, Islam, Nationalism, and Modernity: A History, 1789-2007, reexamines the transition from Ottoman Empire to nation-state. Ottomans and Turks, Findley argues, triangulated over time among three reference points: Islam, nationalism, and modernity. Choices among these reference points gave rise to two strategies for engaging with modernity: a radical, secularizing current of change and a conservative, Islamically committed current. As competing alternatives oscillated before them, most people resisted choosing. With time, however, the recurrent crises punctuating the transition from empire to nation-state sharpened the differentiation of the two currents and forced choices. The radical current arose with the formation of new civil and military elites and the advent of "print capitalism," symbolized by the emergence in 1860 of privately owned, Turkish-language newspapers. The radicals engineered the 1908 Young Turk revolution and ruled empire and republic until 1950. They made secularism into a lasting "belief system" and still retain powerful positions. The conservative current arose with a series of Islamic renewal movements. Most influential were the movements launched by Mevlana Halid (Shaykh Khalid al-Naqshbandi, 1776-1827), Said Nursi (1873-1960), and Fethullah Gülen (1938- ). Powerful under the empire, Islamic conservatives did not again control the government until the 1980s. By then they, too, had created their own powerful print and electronic media. Although the radical movement has been studied extensively, the conservative one has been less so, and the interaction between the two has not. This book differs sharply from earlier histories that saw a linear evolution from religion and autocracy toward secularism and nationhood. Findley sees instead a dialectical interaction between two powerful forces that alternately clashed and converged to shape late Ottoman and modern Turkish history. From sultans and saints to singers and sinners, the profuse illustrations reinforce the argument by documenting both sides of this dialectic

    Sir James W.Redhouse (1811-1892): the making of a perfect Orientalist?

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    Donated by Klaus KreiserReprinted from : Journal of the American Oriental Society, Vol. 99, No. 4, Oct. - Dec., 1979

    Social dimensions of the Dervish life, as seen in the memoirs of Aşçı Dede Halil İbrahim.

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    Donated by Klaus KreiserReprinted from : Jean-Louis Bacqué-Grammont / Paul Dumont (eds.): Economie et sociétés dans l'Empire ottoman, Paris 1983
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