1,533 research outputs found
Shock-compression of Ni-Al nanolayered foils using controlled laser-accelerated thin foil impact
No full textA laser-driven flyer impact system was constructed, characterized, and validated for performing uniaxial-strain experiments to investigate the shock equation-of-state (EOS) and processes leading to reaction initiation in thin, fully-dense Ni-Al nanolayered foils. Additionally, various fully-dense Ni-Al mixtures with highly heterogeneous microstructures and widely varying length scales were investigated to understand influence of meso-scale features on the shock compression and reaction response. Ni-Al composites are a class of reactive materials also called Structural Energetic Materials (SEMs), which aim to combine stiffness and strength with the ability to release large amounts of energy through highly exothermic reactions when the constituents are intimately mixed during shock loading. While porous reactive materials have been studied extensively, the processes leading to reaction initiation in fully-dense mixtures consisting of phases with disparate mechanical properties is more ambiguous. A table-top, small-scale laser system was developed for studying shock-induced effects in extremely thin reactive materials. Laser accelerated thin foil impact experiments utilizing time-resolved interferometry allowed for measuring the Hugoniot of the nanolayered Ni-Al foil over a range of particle velocities/pressures. Separate recovery experiments were performed by shock-loading Ni-Al foils slightly below the reaction initiation threshold and performing post-mortem TEM/STEM analysis to identify the constituent mixing processes leading to reaction. Direct-shock experiments were performed on the different fully-dense Ni-Al mixtures and hydrodynamic simulations using real microstructures allowed direct correlations with the experiment results, which yielded an improved understanding of the effect of phase arrangement on the shock propagation and reaction initiation response. The EOS experiments performed at particle velocities > 200 m/s showed a deviation from the predicted inert trend and recovered targets showed complete reaction to the B2-NiAl intermetallic phase. The measured deviation from inert behavior and state of recovered material suggests the occurrence of a shock-induced chemical reaction. The shocked (but unreacted) Ni-Al materials contained distinct constituent mixing features (layer jets and intermixed zones), where significant elemental penetration occurred and are likely sources of reaction initiation. The observed results provide the first clear evidence of shock-induced reactions in fully-dense nanolayered Ni-Al foils.Ph.D
Appropriations of Irish drama by modern Korean nationalist theatre : a focus on the influence of Sean O’Casey in a colonial context
No full textMy thesis explores how a translated author on the periphery of the host culture’s
translated repertoire can be at once subversive and innovative on the colonial scene,
using as an example the case of Sean O’Casey in colonial Korea. It explores the
importation of Irish drama in modern Korean theatre during the colonial period and
examines the appropriations of O’Casey’s plays by a central Korean playwright, Yu
Chi-jin, in creating his own plays. Under Japanese colonial rule in the early twentieth
century, intellectuals perceived the supreme task for the Korean people to be the
recovery of national sovereignty and independence. The modern Korean theatre
movement which rose among Korean intellectuals and dramatists during the colonial
period was to play a major part in this task. The ultimate goal of this movement was
to establish a modern national theatre promoting Korean culture and educating the
people, thereby recovering national independence. As their modernised dramatic
polysystem was still "young", Korean intellectuals and dramatists who were
involved in the theatre movement had to borrow dramatic models from other
countries. One of the models they chose was Irish playwrights, especially those who
were involved in the Irish dramatic movement. They published or staged the works
of W.B. Yeats, Lord Dunsany [Edward John Moreton Drax Plunkett], Augusta
Gregory, J.M. Synge, St. J. Ervine, T.C. Murray and Sean O'Casey. Although
O'Casey was considered an important dramatist in the Irish dramatic movement, he
was a playwright on the periphery in the list of translated Irish dramatists in Korea
due to the colonisers’ censorship. However, he remained as a subversive and
innovative playwright on the colonial scene by virtue of being appropriated by Yu
Chi-jin who used O’Casey’s plays as models when creating his own works. In
discussing the subject matter of my thesis, I use Even Zohar’s polysystems theory as
a starting point in looking at ideological issues surrounding translation and extend
the discussion to offer a postcolonial perspective. While most translation in a
colonial context was considered as "an expression of the cultural power of the
colonisers," my thesis shifts the focus to translation as an expression of the cultural
power of the colonised. I explore how the colonised uses another colonised culture to
subvert the colonisers’ power
sj-pdf-1-vet-10.1177_03009858221102600 – Supplemental material for Carnobacterium maltaromaticum associated with meningoencephalitis and otitis in stranded common thresher sharks (Alopias vulpinus)
No full textSupplemental material, sj-pdf-1-vet-10.1177_03009858221102600 for Carnobacterium maltaromaticum associated with meningoencephalitis and otitis in stranded common thresher sharks (Alopias vulpinus) by Laura Martinez Steele, Mark S. Okihiro, Renaud Berlemont, Jesse G. Dillon, Kelly A. Young, Shohreh Hesami, Sean Van Sommeran and Christopher G. Lowe in Veterinary Pathology</p
Supplemental_Material_819240 – Supplemental material for Automated Fluorescence Lifetime Imaging High-Content Analysis of Förster Resonance Energy Transfer between Endogenously Labeled Kinetochore Proteins in Live Budding Yeast Cells
No full textSupplemental material, Supplemental_Material_819240 for Automated Fluorescence Lifetime Imaging High-Content Analysis of Förster Resonance Energy Transfer between Endogenously Labeled Kinetochore Proteins in Live Budding Yeast Cells by Wenjun Guo, Sunil Kumar, Frederik Görlitz, Edwin Garcia, Yuriy Alexandrov, Ian Munro, Douglas J. Kelly, Sean Warren, Peter Thorpe, Christopher Dunsby and Paul French in SLAS Technology</p
The Shape of Things That Came
No full textHG Wells' future history novel looks back from the year 2106. Halfway through the novel's time span, Sean Street explores what the author got almost right - or terribly wrong.
In 1933, Wells published a novel which purported to be a history of the years 1929 to 2105, received from the future in dreams. He called his book The Shape of Things to Come, a phrase that has since become a part of the English language. Now, 84 years into the time scale of this prophetic book and with 88 more to go to complete the story - poet and professor of radio Sean Street goes back to the text and explores what Wells got right, what he got wrong - and what may be yet to come.
From predicting another world war to a utopian world government, he navigates a journey through Wells' future past using audio archives and contemporary news bulletins, with expert help from Christopher Frayling, Andy Sawyer and Orson Wells.
Reader: Jenny Lane
Producer: Andy Cartwright
A Soundscape production for BBC Radio 4
The effect of sediment accumulation on the hydraulic conductivity of pervious concrete
No full textPervious concrete systems can reduce stormwater runoff, minimize non-point source pollution, and increase groundwater recharge. Engineers are often hesitant to use pervious concrete because it costs more than traditional concrete and there is the
possibility that the pervious concrete will clog prematurely; thereby removing any of the
hydraulic advantages that pervious concrete provides. Pervious concrete clogs because sediment builds on the surface by filling in all the void spaces, thus reducing its hydraulic conductivity. In this study, pervious concrete cores were used to measure the effects of
sediment accumulation on their hydraulic conductivity. Established sediment loading rates were used to measure how the hydraulic conductivity changed as sediment accumulated at or near the surface of pervious concrete. The results were used to develop
a model to predict the hydraulic conductivity of pervious concrete based on its initial hydraulic conductivity, the amount of sediment deposited at or near its surface and the soil type of the sediment. The model presented here can be used to craft better maintenance plans to extend the life of pervious concrete and use pervious concrete more efficiently.M.S.Includes bibliographical referencesby Sean Patrick Wals
Interview: Professor Susan J. Carroll on the barriers facing women in politics on both sides of the Atlantic
No full textDemocratic Audit’s Sean Kippin and USApp’s Chris Gilson recently interviewed Professor Susan Carroll, the Author of More Women Can Run: Gender and Pathways to the State Legislatures to coincide with an event at the LSE. They discussed American and British politics, and the different challenges faced by aspirant female politicians and established woman leaders
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Momentum: A Phenomenology of Musical Flow and Meaning
No full textThe past few decades have seen a number of attempts to take musical experience seriously. We now speak of embodiment, temporality, phenomenology, gesture, and performance. While these progressive programs have doubtless begun to move music theory and analysis away from an entrenched score-based paradigm, a deep textualism persists in even the more forward-looking approaches of the discipline.Musi
Absorbing new subjects: holography as an analog of photography
No full textI discuss the early history of holography and explore how perceptions, applications, and forecasts of the subject were shaped by prior experience. I focus on the work of Dennis Gabor (1900–1979) in England,Yury N. Denisyuk (b. 1924) in the Soviet Union, and Emmett N. Leith (1927–2005) and Juris Upatnieks (b. 1936) in the United States. I show that the evolution of holography was simultaneously promoted and constrained by its identification as an analog of photography, an association that influenced its assessment by successive audiences of practitioners, entrepreneurs, and consumers. One consequence is that holography can be seen as an example of a modern technical subject that has been shaped by cultural influences more powerfully than generally appreciated.
Conversely, the understanding of this new science and technology in terms of an older one helps
to explain why the cultural effects of holography have been more muted than anticipated by forecasters
between the 1960s and 1990s
Evolution of foreland basin fluvial systems in the mid‐Cretaceous of Utah, USA (upper Cedar Mountain and Naturita formations)
No full textACKNOWLEDGEMENTS This work was funded by the SAFARI group. We are deeply grateful to Joe Phillips, Sean Kelly, James Mullins, Ryan King and Jostein Myking Kjærefjord for help in the field. We would also like to thank Associate Editor, Christopher Fielding, for handling the review of this paper. Additionally we thank reviewers Benjamin Cardenas and Brian Currie for their comments and suggested revisions which have greatly enhanced this paper. Open Access via the Jisc Wiley AgreementPeer reviewe
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