Does a large quantum Fisher information imply Bell correlations?

The quantum Fisher information (QFI) of certain multipartite entangled quantum states is larger than what is reachable by separable states, providing a metrological advantage. Are these nonclassical correlations strong enough to potentially violate a Bell inequality? Here, we present evidence from two examples. First, we discuss a Bell inequality designed for spin-squeezed states which is violated only by quantum states with a large QFI. Second, we relax a well-known lower bound on the QFI to find the Mermin Bell inequality as a special case. However, a fully general link between QFI and Bell correlations is still open.Comment: 4 pages, minor edit

Debate. Drug-coated balloons for de novo coronary artery lesions. Still not enough evidence, and the new drug-eluting stents are still better

What is the evidence available on the use of drug-coated balloons (DCB) in the de novo lesion setting

FCNC Decays of the Top Quark

If new physics (e.g. SUSY) does not show up as direct evidence at the LHC, it could still be observable in FCNC processes involving the $t$-quark. We take a close look at the process $t\to c + h/Z$ and show that its branching ratio in the Standard Model is subject to three mechanisms of suppression. To obtain an observable signal, one needs to evade all these mechanisms in a theory beyond the Standard Model. We show that a theory like the cMSSM cannot provide a big enough enhancement. However, in a framework like $R$-parity-violating SUSY, observable signals are a distinct possibility.Comment: 6 pages, 3 figures, Talk presented at the CKM2016, to appear in Proceedings for the 9th International Workshop on the CKM Unitarity Triangl

Screening for Autism Spectrum Disorder in Young Children: Still Not Enough Evidence

This is the final version. Available on open access from SAGE Publications via the DOI in this recordData availability statement: All data generated or analyzed during this study are included in this published article and its Supplemental Material information files.BACKGROUND: Early detection of autism spectrum disorder (ASD) has the potential to significantly reduce the impact of the condition, however previous reviews have found little evidence to support screening programs for ASD in young children. METHODS: We conducted a review with the aim of updating evidence on 3 aspects: (a) diagnostic stability of ASD in young children; (b) accuracy of ASD screening tools in young children; and (c) the benefits of early interventions in screen-detected young children with ASD. RESULTS: A total of 33 studies were included in our review. Five studies looking at diagnostic stability reported estimates ranging from 71.9% to 100%, however the majority only included a follow-up of 24 months and all studies raised concerns regarding the risk of bias due particularly to lack of blinding, sample size, and patient flow. A total of 25 studies, reported in 26 articles, were identified that reported accuracy data on 11 screening tools. Most of the reports were concerned with versions of M-CHAT, reporting sensitivity estimates from 0.67 to 1.0; however, many of these were deemed to be of high risk of bias due to lack of blinding and follow-up. Four studies reported on early interventions in screen-detected children; however, the majority did not find significant improvements on the relevant outcomes. CONCLUSIONS: Overall, the evidence on screening for ASD in young children captured by this review is not conclusive regarding the 3 aspects of screening in this population. Future studies should attempt to ensure blinded diagnostic assessments, include longer follow-up periods and limit attrition.UK National Screening Committe

Cultural Capital, Cultural Knowledge and Ability

Bourdieu\'s theory of cultural reproduction has been interpreted in various ways, and several authors have criticised an overly narrow interpretation of cultural capital as simply consisting of \'beaux arts\' participation. For researchers, this raises the challenge of developing a broader interpretation of cultural capital which is still specific enough to be operationalised. This paper discusses the ways in which parents may transmit educational advantage to their children through cultural rather than economic means, and the forms of knowledge and skill which may be considered as \'cultural capital\'. An operationalisation of cultural knowledge is discussed, and empirical evidence is presented on differences in levels of cultural knowledge between the children of graduates and non-graduates.[No keywords]

New media, old politics? (Polis summer school paper)

New media is still a prisoner of old politics. Despite the claims for enpowering people, the evidence is that blogs, Twitter and online activism replicates rather than revolutionises politics. That is the argument of this paper by Vanessa Gottlieb, a Polis Summer School student. She describes the many ways that new media can enhance democracy but suggests that so far, it is still limited by the context it operates in. Indeed, new media communications themselves are still not open or democratic enough to challenge existing political structures

An empirical way to correct some drawbacks of mulliken population analysis

Indexación: ScieloThe problem of negative electronic populations and of occupation numbers greater than 2 has plagued Mulliken Population Analysis since the very beginning. Through the analysis of three model molecular systems, several basis sets and the relevant literature, we conclude that there is not enough evidence to assign the origin of these errors to the self-consistent scheme, to Mulliken's partition, to the basis set structure or to a combination of these. As Mulliken Population Analysis is still widely used, we have developed an empirical method to eliminate negative electronic populations and occupation numbers greater than 2. This method can be used for any partition of the electron density (not only Mulliken's), for any basis set and for any LCAO-MO methodology (semiempirical or ab initio). Finally, the method does not produce any change in the original atomic net charges.http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072009000400036&lng=es&nrm=is

Evidence of Speed—Highway Radar

The problem of the highway speeder is almost as old as the automobile itself. With this problem came two others—one, the detection of the speeding motorist, and two, the use of the means of detection as evidence in convicting the offender. Through the years many devices have been invented to determine the speed of an automobile. Some of these have succeeded m the courtroom and are still used; others have been determined inadmissible in evidence. Some of the means most commonly used at the present time met with difficulty at first and in some instances are still not enough in themselves to gain a conviction

Is a Decent Wage Part of a decent Job? Answers from an Enlarged Europe. WP C.S.D.L.E. "Massimo D'Antona" .INT - 64/2008

Therefore, there is enough evidence to wonder if the question of a decent wage can still really be considered so irrelevant within the confines of the EU; if its substantial exclusion from the quality of work agenda is justified, or if it would not rather be the case to admit that the problem of guaranteeing an adequate wage level is increasingly evident in the EU, not only in the external dimension but also internal. There appear to be two processes in particular which have determined the emergence of the problem, which until the 1990s seemed to have abated if not totally disappeared; on the one hand the introduction of a single currency with the relevant Stability Pact and the necessary policy of wage moderation which followed (§. 2); on the other, the enlarging of the Union - and its market - towards countries characterised by levels of social welfare inferior to that of longer standing member states. (§. 3). Such issues will be dealt with more extensively in the following pages

Diffusion of light in semitransparent media

Light diffusion is usually associated with thick, opaque media. Indeed, multiple scattering is necessary for the onset of the diffusive regime and such condition is generally not met in almost transparent media. Nonetheless, at long enough times, transport in an infinite thin slab is still determined by a multiple scattering process whose complete characterization is lacking. In this paper we show that, after a short transient, the mean square width of the transmitted intensity still exhibits a simple linear increase with time as predicted by diffusion theory, even at optical thickness as low as one. Interestingly, such linear growth is predicted not to depend neither on the slab thickness nor on its refractive index contrast, yet the accuracy of this simple approximation in the ballistic-to-diffusive regime hasn't been investigated so far. By means of Monte Carlo simulations, we find clear evidence that boundary conditions play an active role in redefining the very asymptotic value of the diffusion coefficient by directly modifying the statistical distributions underlying light transport in such media. In this respect, we demonstrate the need to distinguish between a set of intrinsic and effective transport parameters, whose relation and interplay with boundary conditions remains to be fully understood