76 research outputs found
Bond-Market Strains Keep Traders on Edge
https://www.wsj.com/articles/bond-market-strains-keep-traders-on-edge-1158469660
Minisuperspace Quantization of "Bubbling AdS" and Free Fermion Droplets
We quantize the space of 1/2 BPS configurations of Type IIB SUGRA found by
Lin, Lunin and Maldacena (hep-th/0409174), directly in supergravity. We use the
Crnkovic-Witten-Zuckerman covariant quantization method to write down the
expression for the symplectic structure on this entire space of solutions. We
find the symplectic form explicitly around AdS_5 x S^5 and obtain a U(1)
Kac-Moody algebra, in precise agreement with the quantization of a system of N
free fermions in a harmonic oscillator potential, as expected from AdS/CFT. As
a cross check, we also perform the quantization around AdS_5 x S^5 by another
method, using the known spectrum of physical perturbations around this
background and find precise agreement with our previous calculation.Comment: 22 Pages + 2 Appendices, JHEP3; v3: explanation of factor 2 mismatch
added, references reordered, published versio
A Two-Stage Theory of Discussant Influence on Vote Choice in Multiparty Systems
This article addresses two aspects of social network influence on voters’ electoral choices that are not well understood: the role of party systems as institutional contexts and the relationship between social pressure and information sharing as mechanisms of influence. It argues that in the cleavage-based multiparty systems of Western Europe, discussant influence at elections occurs in two stages. First, discussants place social pressure on voters to opt for parties from the same ideological camp. Secondly, by providing information, discussants influence which parties voters eventually choose out of these restricted ‘consideration sets’. The study tests these assumptions using a panel survey conducted at the 2009 German federal election. The first proposition is clearly confirmed, and the evidence supports the second proposition, although less unequivocally.</jats:p
Development of gaze aversion: qualitiative changes over the early school years
Looking away from an interlocutors’ face during demanding cognitive activity can help adults and children answer challenging mental arithmetic and verbal-reasoning questions (Glenberg, Schroeder, & Robertson, 1998; Phelps, Doherty-Sneddon & Warnock, in press). Whilst such ‘gaze aversion’ (GA) is used far less by 5-year old school children, its use increases dramatically during the first years of primary education, reaching adult levels by 8-years of age (Doherty-Sneddon, Bruce, Bonner, Longbotham, & Doyle, 2002). The current study investigates whether developmental changes also occur in a qualitative aspect of GA - the direction of movement involved in GA shifts. Video data from 18 5-year-olds and 19 8-year-olds answering verbal and arithmetic questions were analysed for direction of GA. We found very different profiles of direction of GA across the two ages: whilst the 5-year-olds used predominantly rapid multi-directional ‘flicking’ movements and some sustained left lateral movements, the 8-year-olds used predominantly sustained rightward movements. It is concluded that, as well as quantitative increases in the use of GA across these age groups, there are concomitant qualitative changes in the nature of GA shifts. A model of human attention in face-to-face interaction is discussed as are implications for the assessment of children’s learning and development
Predictors of tuberculosis (TB) and antiretroviral (ARV) medication non-adherence in public primary care patients in South Africa: A cross sectional study
Background: Despite the downward trend in the absolute number of tuberculosis (TB) cases since 2006 and the
fall in the incidence rates since 2001, the burden of disease caused by TB remains a global health challenge. The
co-infection between TB and HIV adds to this disease burden. TB is completely curable through the intake of a
strict anti-TB drug treatment regimen which requires an extremely high and consistent level of adherence.The aim
of this study was to investigate factors associated with adherence to anti-TB and HIV treatment drugs.
Methods: A cross-sectional survey method was used. Three study districts (14 primary health care facilities in each)
were selected on the basis of the highest TB caseload per clinic. All new TB and new TB retreatment patients were
consecutively screened within one month of anti-tuberculosis treatment. The sample comprised of 3107 TB patients
who had been on treatment for at least three weeks and a sub-sample of the total sample were on both anti-TB
treatment and anti-retro-viral therapy(ART) (N = 757). Data collection tools included: a Socio-Demographic
Questionnaire; a Post-Traumatic-Stress-Disorder (PTSD) Screen; a Psychological Distress Scale; the Alcohol Use
Disorder Identification Test (AUDIT); and self-report measures of tobacco use, perceived health status and
adherence to anti-TB drugs and ART.
Results: The majority of the participants (N = 3107) were new TB cases with a 55.9% HIV co-infection rate in this
adult male and female sample 18 years and older. Significant predictors of non-adherence common to both anti-TB
drugs and to dual therapy (ART and anti-TB drugs) included poverty, having one or more co-morbid health
condition, being a high risk for alcohol mis-use and a partner who is HIV positive. An additional predictor for
non-adherence to anti-TB drugs was tobacco use.
Conclusions: A comprehensive treatment programme addressing poverty, alcohol mis-use, tobacco use and
psycho-social counseling is indicated for TB patients (with and without HIV). The treatment care package needs to
involve not only the health sector but other relevant government sectors, such as social development.IS
Using surveillance data to determine treatment rates and outcomes for patients with chronic hepatitis C virus infection
The aim of this work was to develop and validate an algorithm to monitor rates of, and response to, treatment of patients infected with hepatitis C virus (HCV) across England using routine laboratory HCV RNA testing data. HCV testing activity between January 2002 and December 2011 was extracted from the local laboratory information systems of a sentinel network of 23 laboratories across England. An algorithm based on frequency of HCV RNA testing within a defined time period was designed to identify treated patients. Validation of the algorithm was undertaken for one center by comparison with treatment data recorded in a clinical database managed by the Trent HCV Study Group. In total, 267,887 HCV RNA test results from 100,640 individuals were extracted. Of these, 78.9% (79,360) tested positive for viral RNA, indicating an active infection, 20.8% (16,538) of whom had a repeat pattern of HCV RNA testing suggestive of treatment monitoring. Annual numbers of individuals treated increased rapidly from 468 in 2002 to 3,295 in 2009, but decreased to 3,110 in 2010. Approximately two thirds (63.3%; 10,468) of those treated had results consistent with a sustained virological response, including 55.3% and 67.1% of those with a genotype 1 and non-1 virus, respectively. Validation against the Trent clinical database demonstrated that the algorithm was 95% sensitive and 93% specific in detecting treatment and 100% sensitive and 93% specific for detecting treatment outcome. Conclusions: Laboratory testing activity, collected through a sentinel surveillance program, has enabled the first country-wide analysis of treatment and response among HCV-infected individuals. Our approach provides a sensitive, robust, and sustainable method for monitoring service provision across Englan
Identification of successful mentoring communities using network-based analysis of mentor–mentee relationships across Nobel laureates
Large expert-curated database for benchmarking document similarity detection in biomedical literature search
Document recommendation systems for locating relevant literature have mostly relied on methods developed a decade ago. This is largely due to the lack of a large offline gold-standard benchmark of relevant documents that cover a variety of research fields such that newly developed literature search techniques can be compared, improved and translated into practice. To overcome this bottleneck, we have established the RElevant LIterature SearcH consortium consisting of more than 1500 scientists from 84 countries, who have collectively annotated the relevance of over 180 000 PubMed-listed articles with regard to their respective seed (input) article/s. The majority of annotations were contributed by highly experienced, original authors of the seed articles. The collected data cover 76% of all unique PubMed Medical Subject Headings descriptors. No systematic biases were observed across different experience levels, research fields or time spent on annotations. More importantly, annotations of the same document pairs contributed by different scientists were highly concordant. We further show that the three representative baseline methods used to generate recommended articles for evaluation (Okapi Best Matching 25, Term Frequency-Inverse Document Frequency and PubMed Related Articles) had similar overall performances. Additionally, we found that these methods each tend to produce distinct collections of recommended articles, suggesting that a hybrid method may be required to completely capture all relevant articles. The established database server located at https://relishdb.ict.griffith.edu.au is freely available for the downloading of annotation data and the blind testing of new methods. We expect that this benchmark will be useful for stimulating the development of new powerful techniques for title and title/abstract-based search engines for relevant articles in biomedical research.Peer reviewe
The universal values of science and China’s Nobel Prize pursuit
China does not seem to believe the existence of universally acknowledged values in science and fails to promote the observation of such values that also should be applied to every member of the scientific community and at all times. Or, there is a separation between the practice of science in China and the values represented by modern science. In this context, science, including the pursuit of the Nobel Prize, is more a pragmatic means to achieve the end of the political leadership – the national pride in this case – than an institution laden with values that govern its practices. However, it is the recognition and respect of the latter that could lead to achievement of the former, rather than the other way around
#Cardozo20for20
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