20,034 research outputs found
Hollowgraphy Driven Holography: Black Hole with Vanishing Volume Interior
Hawking-Bekenstein entropy formula seems to tell us that no quantum degrees
of freedom can reside in the interior of a black hole. We suggest that this is
a consequence of the fact that the volume of any interior sphere of finite
surface area simply vanishes. Obviously, this is not the case in general
relativity. However, we show that such a phenomenon does occur in various
gravitational theories which admit a spontaneously induced general relativity.
In such theories, due to a phase transition (one parameter family degenerates)
which takes place precisely at the would have been horizon, the recovered
exterior Schwarzschild solution connects, by means of a self-similar transition
profile, with a novel 'hollow' interior exhibiting a vanishing spatial volume
and a locally varying Newton constant. This constitutes the so-called
'hollowgraphy' driven holography.Comment: Honorable Mention Essay - Gravity Research Foundation (2010
Development of welding techniques and filler metals for high strength aluminum alloys second quarterly report, 1 oct. - 31 dec. 1964
Welding techniques and filler metals for high strength aluminum alloys evaluated by bulge test progra
Can altering the structure of financial support payments aid work retention amongst lone parents? Qualitative evaluation of the In Work Retention Pilot
Wage supplementations in the form of temporary ‘in-work credits’ have been introduced in recent years for a number of claimant groups entering work, to encourage enhanced work entry and retention rates. For lone parents, the In Work Credit was piloted from April 2004 and then rolled out nationally in April 2008. It is a wage supplement paid at £40 a week (£60 in London) for 12 months to eligible lone parents moving in to work. From July 2008 to June 2010, a variant on this, the In Work Retention Pilot (IWRP), was trialled in two Jobcentre Plus districts. The IWRP was intended to test the effectiveness of using In Work Credit payments as an aid to job retention and progression, by changing the payment structure of the credits and offering additional advisory support on retention and advancement.
This report presents findings from a qualitative evaluation of the IWRP, examining the delivery of the pilot and the views of lone parents and Jobcentre Plus staff on: the distinctive IWRP payment structure; the retention and progression challenges facing lone parents and the support received; and whether and how the IWRP made a difference to work behaviour and decisions. The study is based on interviews, focus groups and observations with Jobcentre Plus delivery staff and participating lone parents
Persistent Homology in Sparse Regression and its Application to Brain Morphometry
Sparse systems are usually parameterized by a tuning parameter that
determines the sparsity of the system. How to choose the right tuning parameter
is a fundamental and difficult problem in learning the sparse system. In this
paper, by treating the the tuning parameter as an additional dimension,
persistent homological structures over the parameter space is introduced and
explored. The structures are then further exploited in speeding up the
computation using the proposed soft-thresholding technique. The topological
structures are further used as multivariate features in the tensor-based
morphometry (TBM) in characterizing white matter alterations in children who
have experienced severe early life stress and maltreatment. These analyses
reveal that stress-exposed children exhibit more diffuse anatomical
organization across the whole white matter region.Comment: submitted to IEEE Transactions on Medical Imagin
Turbulence Effects upon Laser Propagation in the Marine Boundary Layer
Shipboard measurements of small scale temperature and velocity fluctuations have been accomplished to determine optical wave propagation properties of the marine boundary layer. Measurements were recorded for ocean conditions in Monterey Bay and in the confines of the Pacific Missile Range. Laser beam propagation measurements were performed in conjunction with the meteorological measurements
Scotland, Catalonia and the “right” to self-determination: a comment suggested by Kathryn Crameri’s “Do Catalans Have the Right to Decide?
No abstract available
Outbreak of acute hepatitis C following the use of anti-hepatitis C virus--screened intravenous immunoglobulin therapy
BACKGROUND and AIMS: Hepatitis C virus (HCV) infection has been associated with intravenous (IV) immunoglobulin (Ig), and plasma donations used to prepare IV Ig are now screened to prevent transmission. Thirty-six patients from the United Kingdom received infusions from a batch of anti-HCV antibody-screened intravenous Ig (Gammagard; Baxter Healthcare Ltd., Thetford, Norfolk, England) that was associated with reports of acute hepatitis C outbreak in Europe. The aim of this study was to document the epidemiology of this outbreak. METHODS: Forty-six patients from the United Kingdom treated with Gammagard (34 exposed and 12 unexposed to the batch) returned epidemiological questionnaires. RESULTS: Eighty-two percent of the exposed patients (28 of 34) became positive for HCV RNA. Eighteen percent of the patients (6 of 34) who had infusions with this batch tested negative for HCV RNA, but 2 of the patients had abnormal liver function and subsequently seroconverted to anti-HCV antibody positive. Twenty-seven percent of the patients (9 of 34) developed jaundice, and 79% (27 of 34) had abnormal liver transferase levels. Virus isolates (n=21), including an isolate from the implicated batch, were genotype 1a and virtually identical by sequence analysis of the NS5 region, consistent with transmission from a single source. CONCLUSIONS: Hepatitis C infection can be transmitted by anti-HCV-screened IV Ig. Careful documentation of IV Ig batch numbers and regular biochemical monitoring is recommended for all IV Ig recipients
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