28,846 research outputs found
[Letter from Alex Bradford to Lieutenant and Mrs. Ray Starner - November 4, 1940]
No full textLetter from Alex Bradford to Lieutenant and Mrs. Ray Starner describing the the current state of affairs that the author was experiencing, including: the London blitz, the moral of the troops on the ground, and the collective company of men opposing the Nazi regime
Gamma-D crystallin gene (CRYGD) mutation causes autosomal dominant congenital cerulean cataracts
No full textCongenital cataracts are a major cause of bilateral visual impairment in childhood. We mapped the gene responsible for autosomal congenital cerulean cataracts to chromosome 2q33-35 in a four generation family of Moroccan descent. The maximum lod score (7.19 at recombination fraction theta=0) was obtained for marker D2S2208 near the g-crystallin gene (CRYG) cluster. Sequencing of the coding regions of the CRYGA, B, C, and D genes showed the presence of a heterozygous C>A transversion in exon 2 of CRYGD that is associated with cataracts in this family. This mutation resulted in a proline to threonine substitution at amino acid 23 of the protein in the first of the four Greek key motifs that characterise this protein. We show that although the x ray crystallography modelling does not indicate any change of the backbone conformation, the mutation affects a region of the Greek key motif that is important for determining the topology of this protein fold. Our data suggest strongly that the proline to threonine substitution may alter the protein folding or decrease the thermodynamic stability or solubility of the protein. Furthermore, this is the first report of a mutation in this gene resulting in autosomal dominant congenital cerulean cataracts
The student's guide to completing an author study
No full textThe 'Student's guide to completing an author study' emerged during the early development of the school library resource center program at Glen Stewart Elementary School in Stratford Canada on Prince Edward Island. This research process centered on an author study, with direct teaching and clear assignment. The resulting model has been adapted to various grade levels and subject areas in different schools.Source type: Electronic(1)http://proquest.umi.com/pqdweb?did=49237063&Fmt=7&clientId=65345&RQT=309&VName=PQ
Active X-ray optics for the next generation of X-ray space telescopes
No full textDescribed within is the design, manufacture, metrology and X-ray testing of an active X-ray
prototype intended for the next generation of X-ray telescopes. One of the challenges faced by
the X-ray telescope community is how to combine high resolution and high sensitivity into one
system, as weight limitations place constraints on the optics that can be launched. Therefore the
mandate of the active X-ray prototype is to provide high sensitivity through the ability of the optics
to be nested and to deliver high angular resolution through the active control of the optic’s form.
Piezoelectric unimorph actuators provide the active component: it is intended that they will correct
for figure errors within the optic and therefore increase the angular resolution capability.
The prototype’s design is based upon an ellipsoidal segment which provides point-to-point
focussing of an X-ray source. The prototype itself is composed of an electroformed nickel optic
where the non-reflective surface is populated with 30 piezoelectric actuators and it is the production
of the prototype that is the core of the presented research. Metrology of the actuators’ influence
functions is presented and highlight the prototype’s ability to deform its optic surface by microns.
In addition, the measured influence functions are compared against finite element models and a
distinct similarity between the functions is observed.
The prototype was tested at an X-ray beamline facility in November 2008 and the results
showed the prototype’s ability to correct the optic to achieve an improved angular resolution: from
0.786 arc-minutes to 0.686 arc-minutes in terms of full width half maximum. Finally, difficulties
in the manufacture of the prototype and X-ray testing shall be presented alongside future work in
conclusion to this thesis
Diasporas of the so-called anthropocene:notes in the margins of "The Anthropocene Atlas of Geneva"
No full textGene Ray calls for a post-modernism that would fully overcome capitalist modernity and its catastrophes. From a reading of Walter Benjamin’s Thesis on the Philosophy of History and Trauerspiel, Ray invokes allegory as an operational mode likely to save the relics of lost fights and inspire future struggles. Art—thought of as a knowledge that uses not only reason but also the senses—must collect these relics lest they become the trophies of the ruling class: in the apocalypse-stricken aboriginal people of America and the devastating effects of the ecological crisis, Ray sees the consequences of the modern progress it pursues. Ray’s sharp reflections follow the completion of the The Anthropocene Atlas of Geneva (TAAG) HEAD-FNS collective research project, in which Ray took part. Amongst other things, TAAG put the little “green” Geneva back into the entanglement of the Anthropocene’s planetary perturbations through movies, documents, and interviews made by artist researchers
Author, Geraldine Brooks at the National Library of Australia for the 2009 Ray Mathew Lecture, Canberra, 23 October 2009 [picture] /
No full textTitle from acquisitions documentation.; Part of the collection: Portraits of author, Geraldine Brooks during her visit to the National Library of Australia for the 2009 Ray Mathew Lecture, Canberra, 23 October 2009.; Acquired in digital format; access copy available online.; Mode of access: Internet via World Wide Web.; Photographed by a staff member of the National Library of Australia
Justice afoot
No full textOne night in 1998, a collective amputated the foot of an equestrian statue of Juan de Oñate in New Mexico. In this article, Gene Ray examines the multiple echoes of this iconoclastic act, a reference to the mutilation of indigenous Acoma people 400 years earlier by the Spanish conquistadors, to whom Oñate belonged. This article is for an open source online journal under Creative Commons Non-commercial license. The pdf provided is freely available to anyone for download
A 2 h periodic variation in the low-mass X-ray binary Ser X-1
No full textSpectroscopy of the low-mass X-ray binary Ser X-1 using the Gran Telescopio Canarias have revealed a ?2 h periodic variability that is present in the three strongest emission lines. We tentatively interpret this variability as due to orbital motion, making it the first indication of the orbital period of Ser X-1. Together with the fact that the emission lines are remarkably narrow, but still resolved, we show that a main-sequence K dwarf together with a canonical 1.4 M? neutron star gives a good description of the system. In this scenario, the most likely place for the emission lines to arise is the accretion disc, instead of a localized region in the binary (such as the irradiated surface or the stream-impact point), and their narrowness is due instead to the low inclination (?10°) of Ser X-1
Happy Birthday Joseph Beuys - sort of
No full textOn the occasion of the 100th anniversary of German artist Joseph Beuys, the author reflects on the gap between the critical controversies and debates that have characterized the artist's international reception on the one hand and on the other the artist's continuing official approval and celebration in Germany. Drawing on his experiences doing PhD and post-doctoral research on Beuys in Germany and curating a major exhibition and conference on Beuys in the USA, as well as his more recent reinterpretations of the artist's work in the context of the post-1945 rewriting of the sublime, Ray offers a considered and qualified evaluation of the artist's contested legacies
Ode to an empty plinth ::iconoclasm by Other Means
No full textIn a 1997 issue of October journal devoted to the Situationists, T.J. Clark and Donald Nicholson-Smith rejected the narrative that, in the early 1960s, the SI renounced art in favour of politics. In reality, the organisation only renounced conventional and representational forms of art, all the while defending the utopian dimension of the artistic project. Gene Ray develops this argument by relying on the action of the Situationists at the Place de Clichy in Paris, where they tried to reinstall a statue of Fourier
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