939 research outputs found
Assessment of Antenna Image Quality by a Mechanical Observer
Control Systems Laboratory changed its name to Coordinated Science LaboratoryContract DA-36-039-SC-5669
Optical Simulation of Antenna Images
Control Systems Laboratory changed its name to Coordinated Science LaboratoryContract DA-36-039-SC-5669
Local environment of Nitrogen in GaN{y}As{1-y} epilayers on GaAs (001) studied using X-ray absorption near edge spectroscopy
X-ray absorption near-edge spectroscopy (XANES) is used to study the N
environment in bulk GaN and in GaN{y}As{1-y} epilayers on GaAs (001), for y
\~5%. Density-functional optimized structures were used to predict XANES via
multiple-scattering theory. We obtain striking agreement for pure GaN. An alloy
model with nitrogen pairs on Ga accurately predicts the threshold energy, the
width of the XANES ``white line'', and features above threshold, for the given
X-ray polarization. The presence of N-pairs may point to a role for molecular
N_2 in epitaxial growth kinetics.Comment: Four pages (PRL style) with two figure
Methylmercury exposure and developmental neurotoxicity.
Comment on: Global methylmercury exposure from seafood consumption and risk of developmental neurotoxicity: a systematic review. [Bull World Health Organ. 2014]]]>
Humans; Methylmercury Compounds; Neurotoxicity Syndromes
eng
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Application of a computationally efficient method to approximate gap model results with a probabilistic approach
info:doi:10.5194/gmd-7-1543-2014
info:eu-repo/semantics/altIdentifier/doi/10.5194/gmd-7-1543-2014
Scherstjanoi, M.
Kaplan, J. O.
Lischke, H.
info:eu-repo/semantics/article
article
2014
Geoscientific Model Development, vol. 7, no. 4, pp. 1543-1571
urn:issn:1991-959x
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Meningite purulente aigue a Listeria seeligeri chez un adulte immunocompetent. [Acute purulent Listeria seelingeri meningitis in an immunocompetent adult]
info:eu-repo/semantics/altIdentifier/pmid/3082004
Rocourt, J.
Hof, H.
Schrettenbrunner, A.
Malinverni, R.
Bille, J.
info:eu-repo/semantics/article
article
1986-02
Schweizerische Medizinische Wochenschrift, vol. 116, no. 8, pp. 248-51
info:eu-repo/semantics/altIdentifier/pissn/0036-7672
<![CDATA[Within the genus Listeria, the species L. monocytogenes most frequently causes disease in animals and humans. L. Seeligeri, a species recently described, has been considered experimentally nonpathogenic so far. The authors report the first case of human infection in a previously healthy adult presenting with acute purulent meningitis due to L. seeligeri. The patient recovered promptly after a course of ampicillin and gentamicin, but developed severe neurological sequelae (epilepsy, hydrocephalus) one year after the acute episode. The pathogenic properties of this isolate were investigated in two experimental animal models and the results were as follows. The clinical isolate of L. seeligeri was able to colonize the spleens of adult mice without bacterial multiplication, in contrast to the type strain of L. seeligeri (no colonization) and to a L. monocytogenes strain (colonization and multiplication). Previous infection of adult mice with the clinical L. seeligeri isolate protected moderately against spleen colonization and bacterial multiplication after challenge with L. monocytogenes. No lethal effect was observed after inoculation of suckling mice with the clinical L. seeligeri isolate, in contrast to L. monocytogenes strains. Thus, L. seeligeri, previously described as experimentally nonpathogenic for mice, may in fact be a heterogeneous species regarding its pathogenicity, and include strains that may cause life-threatening diseases in humans
Finding iteration patterns in dynamic Web page authoring
The final publication is available at Springer via http://dx.doi.org/10.1007/11431879_10Revised Selected Papers of the Joint Working Conferences EHCI-DSVIS 2004, Hamburg, Germany, July 11-13, 2004Most of the current WWW is made up of dynamic pages. The development of dynamic pages is a difficult and costly endeavour, out-of-reach for most users, experts, and content producers. We have developed a set of techniques to support the edition of dynamic web pages in a WYSIWYG environment. In this paper we focus on specific techniques for inferring changes to page generation procedures from users actions on examples of the pages generated by these procedures. More specifically, we propose techniques for detecting iteration patterns in users’ behavior in web page editing tasks involving page structures like lists, tables and other iterative HTML constructs. Such patterns are used in our authoring tool, DESK, where a specialized assistant, DESK-A, detects iteration patterns and generates, using Programming by Example, a programmatic representation of the user’s actions. Iteration patterns help obtain a more detailed characterization of users’ intent, based on user monitoring techniques, that is put in relation to application knowledge automatically extracted by our system from HTML pages. DESK-A relieves end-users from having to learn programming and specification languages for editing dynamic-generated web pages.The work reported in this paper is being supported by the Spanish Ministry of Science
and Technology (MCyT), project number TIC2002-194
Nonsingular instantons for the creation of open universes
We show that the instability of the singular Vilenkin instanton describing
the creation of an open universe can be avoided using, instead of a minimally
coupled scalar field, an axionic massless scalar field which gives rise to the
Giddings-Strominger instanton. However, if we replace the singularity of the
Hawking Turok instanton for an axionic wormhole some interpretational and
technical difficulties would appear which can be overcome by introducing a
positive cosmological constant in the action. This would make the instanton
finite and free constant in the action. This would make the instanton finite
and free from any instabilities.Comment: 8 pages, RevTex. A new section on the instantonic global structure
and a figure have been added. To appear in Phys. Rev.
Thermodynamics of R-charged Black Holes in AdS(5) From Effective Strings
It is well known that the thermodynamics of certain near-extremal black holes
in asymptotically flat space can be lifted to an effective string description
created from the intersection of D-branes. In this paper we present evidence
that the semiclassical thermodynamics of near-extremal R-charged black holes in
AdS(5)xS(5) is described in a similar manner by effective strings created from
the intersection of giant gravitons on the S(5). We also present a free fermion
description of the supersymmetric limit of the one-charge black hole, and we
give a crude catalog of the microstates of the two and three-charge black holes
in terms of operators in the dual conformal field theory.Comment: v2: references and typos corrected, 24 pages, latex2
Recommended from our members
Preconditioned gradient methods for sparse linear systems for very `large structural` problems
This paper deals with background and practical experience with preconditioned gradient methods for sparse linear systems for `very large` structural problems. The conjugate gradient method with diagonal preconditioning (CG/D) is demonstrated to substantially increase the size of structural problems that can be analyzed, significantly reduce computer storage requirements, and cut computing cost; thus allowing for much more detailed modeling and increased engineering efficiency. For one case for a structural system with 396,087 unknowns, the conjugate gradient method with diagonal preconditioning is demonstrated to be a factor of sixty faster than the direct method. For certain problems, however, the number of iterations required by the CG/D method is excessive and improved methods are needed. A stand-alone iterative solver research computer program was developed to evaluate the merits of various matrix preconditioners. A matrix preconditoner based on a shifted incomplete Cholesky factorization algorithm was demonstrated to be superior to other choices. The stand-alone program incorporates an effective data management strategy which utilizes disk and solid state auxiliary computer storage devices to make it possible to efficiently solve excessively large structural problems on state-of-the-art vector and parallel computers. The background of gradient methods, algorithms for their implementation, and practical experience in their applications to structural problems are presented
Coupling Of Ribosome And tRNA Dynamics During Translation
Interstellar matter and star formatio
High Dose Methylprednisolone for Veno-Occlusive Disease of the Liver in Pediatric Bone Marrow Transplant Recipients
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