252,640 research outputs found

    G. Robert Vincent tells how he recorded the voice of former President Roosevelt in 1912

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    Gift of G. Robert Vincent.Gift of G. Robert Vincent.G. Robert Vincent tells how he, at the age of 14, recorded the voice of former President Roosevelt in 1912. Includes the actual recording

    Aspect-ratio dependence of the transition to the ultimate state of turbulent Rayleigh-Bénard convection

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    We report on measurements of the ultimate-state transition in turbulent Rayleigh-B\'enard convection obtained in a large facility known as the ``Uboot of G\"ottingen" and using pressurized sulfur hexafluoride as the convecting fluid. We found that the transition occurs over a range of RaRa which becomes more narrow as Γ\Gamma increases, ranging from Ra1Ra_1^* which is at most weakly dependent on Γ\Gamma and close to 101310^{13} to Ra2Ra_2^* which varies from about 2×10152\times 10^{15} for Γ=0.33\Gamma = 0.33 to about 7×10137\times 10^{13} for Γ=1.00\Gamma = 1.00

    Steeplechase photograph from the Alexander G. Olsen Papers

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    Black-and-white photograph of horses and riders during steeplechase, from the Alexander G. Olsen Papers, date and location unknown.Alexander G. Olsen graduated from Norwich University with a degree in civil engineering in 1920. Following his graduation, he served in the U. S. Army and was stationed in the Philippines during World War II. He was first report killed, then missing in action, in the Spring of 1942. Transcription of the letter provided by the Olsen family. Transcriptions may be subject to human error

    Steeplechase photograph from the Alexander G. Olsen Papers

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    Black-and-white photograph of horse and rider during steeplechase, from the Alexander G. Olsen Papers, date and location unknown.Alexander G. Olsen graduated from Norwich University with a degree in civil engineering in 1920. Following his graduation, he served in the U. S. Army and was stationed in the Philippines during World War II. He was first report killed, then missing in action, in the Spring of 1942. Transcription of the letter provided by the Olsen family. Transcriptions may be subject to human error

    Steeplechase photograph from the Alexander G. Olsen Papers

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    Black-and-white photograph of horses and riders during steeplechase, from the Alexander G. Olsen Papers, date and location unknown.Alexander G. Olsen graduated from Norwich University with a degree in civil engineering in 1920. Following his graduation, he served in the U. S. Army and was stationed in the Philippines during World War II. He was first report killed, then missing in action, in the Spring of 1942. Transcription of the letter provided by the Olsen family. Transcriptions may be subject to human error

    The Göttingen rotating turbulent Rayleigh-Bénard convection facility

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    Thermally driven turbulent convection under the influence of global rotation is ubiquitous in nature. Well known examples are the outer convective shell of our Sun and the outer liquid core of the Earth. Trying to understand the underlying dynamics of such flows is highly challenging, not only because of the enormous range in length- and time-scales that are involved with these geo/astrophysical cases and the complex interaction of hydrodynamics with electromagnetism, but also because direct measurements on these systems are most often impossible to carry out. We gain access to direct measurements by isolating part of the problem: We focus solely on the hydrodynamical aspects of turbulent convection by performing experiments in the lab and making comparisons with direct numerical simulations (DNS). The canonical system that we use to study such flows is Rayleigh-B\'enard convection (RBC), the flow between a warm bottom plate and cold top plate, in a fluid-filled upright cylindrical cell that is rotating around its geometrical axis. This presentation will focus on the newly constructed rotating RBC facility at the Max Planck Institute for Dynamics and Self-Organization (MPIDS) in G\"ottingen

    CENP-G in neocentromeres and inactive centromeres

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    CENP-G is a novel constitutive centromere-specific protein localized to the kinetochore inner plate and subjacent region. It has been identified as associating specifically with the α-1 subfamily of α-satellite DNA. In the present work, the localization of CENP-G was compared with that of other CENPs by immunofluorescence and fluorescence in situ hybridization. Studies were carried out on four abnormal human centromeres: two neocentromeres and two inactive centromeres. CENP-G was detected in one of the two inactive centromeres but not in the other that shows a partial deletion of the alphoid DNA. Interestingly, CENP-G is also present in neocentromeres, which lack alphoid DNA sequences, and in the human Y chromosome, which lacks the α-1 type of satellite DNA. These data provide further evidence that CENP-G may be an essential factor in cen- tromeric function and that in centromeres lacking the α-1 subfamily of alphoid DNA, other DNA sequences are able to bind CENP-G

    Collaborative Art Practices in HE: Mapping and Developing Pedagogical Models

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    This project asks ‘How is interdisciplinary collaboration "taught" in HE institutions?’ and ‘What pedagogical models can be identified and developed?’ Performing and Creative Arts departments in HE institutions engage students in collaborative practice within a singular discipline or across disciplines, through interdisciplinary or hybridised art forms, as curricula or extra-curricula activity. Where students are engaged with interdisciplinary collaboration within the curriculum, tuition may involve case studies of collaborative partnerships, psychometric tests, a trial and error approach to throwing creative individuals together, or any combination of these. This project aims to bring together ideas and modes of practices used in HE institutions and to present, as far as is possible, an overview of the current practices where interdisciplinary collaboration is a focal point of the learning activity. In brief, and in the context of Performing and Creative Arts departments in HE institutions, this development project aims to: Take a snapshot of current practice in HE Construct typologies of modes of practice Consider how pedagogies may be developed Disseminate documentation setting out, and commenting on, pedagogical approaches to collaborative practic

    CP violation

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