pinecone/core-2020-05-10-deduplication huggingface dataset:
Quasinormal modes of (anti-)de Sitter black holes in the 1 /D expansion

We use the inverse-dimensional expansion to compute analytically the frequencies of a set of quasinormal modes of static black holes of Einstein-(Anti-)de Sitter gravity, including the cases of spherical, planar or hyperbolic horizons. The modes we study are decoupled modes localized in the near-horizon region, which are the ones that capture physics peculiar to each black hole (such as their instabilities), and which in large black holes contain hydrodynamic behavior. Our results also give the unstable Gregory-Laflamme frequencies of Ricci-flat black branes to two orders higher in 1 /D than previous calculations. We discuss the limits on the accuracy of these results due to the asymptotic but not convergent character of the 1 /D expansion, which is due to the violation of the decoupling condition at finite D . Finally, we compare the frequencies for AdS black branes to calculations in the hydrodynamic expansion in powers of the momentum k . Our results extend up to k 9 for the sound mode and to k 8 for the shear mode
The star-triangle relation and 3 d superconformal indices

Superconformal indices of 3 d N = 2 $$ \mathcal{N}=2 $$ supersymmetric field theories are investigated from the Yang-Baxter equation point of view. Solutions of the star-triangle relation, vertex and IRF Yang-Baxter equations are expressed in terms of the q -special functions associated with these 3 d indices. For a two-dimensional monopole-spin system on the square lattice a free energy per spin is explicitly determined. Similar to the partition functions, superconformal indices of 3 d theories with the chiral symmetry breaking reduce to Dirac delta functions with the support on chemical potentials of the preserved flavor groups
Prediction of noise from serrated trailing edges

A new analytical model is developed for the prediction of noise from serrated trailing edges. The model generalizes Amiet’s trailing-edge noise theory to sawtooth trailing edges, resulting in a complicated partial differential equation. The equation is then solved by means of a Fourier expansion technique combined with an iterative procedure. The solution is validated through comparison with the finite element method for a variety of serrations at different Mach numbers. The results obtained using the new model predict noise reduction of up to 10 dB at 90$^º$ above the trailing edge, which is more realistic than predictions based on Howe’s model and also more consistent with experimental observations. A thorough analytical and numerical analysis of the physical mechanism is carried out and suggests that the noise reduction due to serration originates primarily from interference effects near the trailing edge. A closer inspection of the proposed mathematical model has led to the development of two criteria for the effectiveness of the trailing-edge serrations, consistent but more general than those proposed by Howe. While experimental investigations often focus on noise reduction at 90$^º$ above the trailing edge, the new analytical model shows that the destructive interference scattering effects due to the serrations cause significant noise reduction at large polar angles, near the leading edge. It has also been observed that serrations can significantly change the directivity characteristics of the aerofoil at high frequencies and even lead to noise increase at high Mach numbers.The first author (BL) wishes to gratefully acknowledge the financial support co-funded by the Cambridge Commonwealth European and International Trust and China Scholarship Council. The second author (MA) would like to acknowledge the financial support of the Royal Academy of Engineering. The third author (SS) wishes to gratefully acknowledge the support of the Royal Commission for the exhibition of 1851.This is the author accepted manuscript. The final version is available from Cambridge University Press via http://dx.doi.org/10.1017/jfm.2016.13
Molecular characterization of an endophytic Phomopsis liquidambaris CBR-15 from Cryptolepis buchanani Roem. and impact of culture media on biosynthesis of antimicrobial metabolites

An endophytic fungus Phomopsis liquidambaris CBR-15, was isolated from Cryptolepis buchanani Roem. (Asclepiadaceae) and identified by its characteristic culture morphology and molecular analysis of the ITS region of rDNA and intervening 5.8S rRNA gene. The impact of different culture media on biosynthesis of antimicrobial metabolites was tested by disc diffusion assay. Polyketide synthase gene (PKS) of the endophytic fungus was investigated using three pairs of degenerate primers LC1–LC2c, LC3–LC5c and KS3–KS4c by PCR. TLC-bioautography method was employed to detect the antimicrobial metabolites. Antimicrobial metabolites fractionated with ethyl acetate extract showed significant antimicrobial activity against the test bacteria and fungi. Biosynthesis of antimicrobial metabolites was optimum as depicted by zone of inhibition from ethyl acetate extract cultured in potato dextrose broth. Strain CBR-15 was identified as Phomopsis liquidambaris and PKS genes of the fungus were amplified with LC3–LC5c and KS3–KS4c sets of degenerate primers. These findings suggest that endophytic P. liquidambaris CBR-15 harbor iterative type I fungal PKS gene domain which indicates the biosynthetic potential of endophytic fungi as producers of natural antimicrobial metabolites. The study also demonstrates the utilization and optimization of different culture media which best supports for the biosynthesis of the antimicrobial metabolites from P. liquidambaris
S-allylmercaptocysteine reduces carbon tetrachloride-induced hepatic oxidative stress and necroinflammation via nuclear factor kappa B-dependent pathways in mice

Purpose: To study the protective effects and underlying molecular mechanisms of SAMC on carbon tetrachloride (CCl 4)-induced acute hepatotoxicity in the mouse model. Methods: Mice were intraperitoneally injected with CCl 4 (50 μl/kg; single dose) to induce acute hepatotoxicity with or without a 2-h pre-treatment of SAMC intraperitoneal injection (200 mg/kg; single dose). After 8 h, the blood serum and liver samples of mice were collected and subjected to measurements of histological and molecular parameters of hepatotoxicity. Results: SAMC reduced CCl 4-triggered cellular necrosis and inflammation in the liver under histological analysis. Since co-treatment of SAMC and CCl 4 enhanced the expressions of antioxidant enzymes, reduced the nitric oxide (NO)-dependent oxidative stress, and inhibited lipid peroxidation induced by CCl 4. SAMC played an essential antioxidative role during CCl 4-induced hepatotoxicity. Administration of SAMC also ameliorated hepatic inflammation induced by CCl 4 via inhibiting the activity of NF-κB subunits p50 and p65, thus reducing the expressions of pro-inflammatory cytokines, mediators, and chemo-kines, as well as promoting pro-regenerative factors at both transcriptional and translational levels. Conclusions: Our results indicate that SAMC mitigates cellular damage, oxidative stress, and inflammation in CCl4-induced acute hepatotoxicity mouse model through regulation of NF-κB. Garlic or garlic derivatives may therefore be a potential food supplement in the prevention of liver damage. © The Author(s) 2011. This article is published with open access at Springerlink.com.published_or_final_versionSpringer Open Choice, 21 Feb 201
XMM-Newton observation of PSRB2224+65 and its jet

We have investigated the pulsar PSRB2224+65 and its X-ray jet with XMM-Newton. Apart from the long X-ray jet which is almost perpendicular to the direction of proper motion, a putative extended feature at the pulsar position, which is oriented in the opposite direction to the proper motion, is also suggested by this deep X-ray imaging. Non-detection of any coherent X-ray pulsation disfavors the magnetospheric origin of the X-rays observed from the position of PSRB2224+65 and hence suggests that the interpretation of pulsar wind nebula is more viable. We have also probed the origin of PSRB2224+65 and identified a runaway star, which possibly originated from the Cygnus OB9 association, as a candidate for the former binary companion of the neutron star's progenitor. © 2012. The American Astronomical Society. All rights reserved.postprin
I know who I am, but who do they think I am? Muslim perspectives on encounters with airport authorities

In this paper we report an analysis of individual and group interviews with thirty-eight Scottish Muslims concerning their encounters with authority – especially those at airports. Our analysis shows that a key theme in interviewees’ talk of their experience in this context concerns the denial and misrecognition of valued identities such as being British, being respectable and being Muslim. One reason why such experiences are so problematic concerns the denial of agency associated with being positioned in terms that are not one's own. The implications of these findings for understanding the dynamics of intergroup relations are discussed
Evolution and Flare Activity of δ-Sunspots in Cycle 23

First online: 11 August 2015The emergence and magnetic evolution of solar active regions (ARs) of βγδ-type, which are known to be highly flare-productive, were studied with SOHO/MDI data in Cycle 23. We selected 31 ARs that can be observed from their birth phase as unbiased samples for our study. From the analysis of the magnetic topology (twist and writhe), we obtained the following results: i) Emerging βγδ ARs can be classified into three topological types as quasi-β, writhed, and top-to-top. ii) Of these, the writhed and top-to-top types tend to show high flare activity. iii) As the signs of twist and writhe agree with each other in most cases of the writhed type (12 cases out of 13), we propose a magnetic model in which the emerging flux regions in a βγδ AR are not separated, but are united as a single structure below the solar surface. iv) Almost all the writhed-type ARs have downward knotted structures in the middle part of the magnetic flux tube. This is probably the essential property of βγδ ARs. v) The flare activity of βγδ ARs is highly correlated not only with the sunspot area, but also with the magnetic complexity. vi) We suggest that there is a possible scaling-law between the flare index and the maximum umbral are
The problem of a subjective ‘authenticity’ and the articulation of ‘belonging’ among the Irish in England – a psychosocial approach

The file associated with this record is embargoed until 12 months after the date of publication. The final published version may be available through the links above.This article presents the question of identity and authenticity as a problematic one, capable of investigation through a psychosocial lens. ‘Authenticity’, as explored by Erickson (1995) and Weigert (1988, 2009) may be understood as a commitment to self-values, meaning and motivation. Feeling ‘true to oneself’ thus becomes an intensely personal affective project, which remains theoretically the preserve of the individual subject, and thus incapable of challenge by others. However, as identity is inherently social, there is a need to interrogate the affective nature of belonging to a collective identity. In particular, I consider how this personalised sense of authenticity may come into conflict with the need to have one’s personal identity recognised as authentic within the wider set of meaning-makings around the collectivity. I argue that this problem of authenticity and belonging may arise in the interplay between the personal and the collective in three ways: reflection, recognition and ownership. Any articulation of belonging to a collective identity whilst maintaining a personally ‘felt’ authenticity must negotiate these three aspects. In this article, I develop these ideas through my own recent research on discourses of authenticity among the Irish in England. Drawing on Wetherell’s (2012) recent articulation of the affective-discursive I explore how one second-generation Irish woman articulates her experiences of ‘belonging’ and personal ‘authenticity’ in interview talk. I argue that the resolution of dilemmas around the affective and collective nature of authenticity can be usefully investigated by attending to the co-construction of the interview between participant and interviewer. The positioning of the interviewer and the power dynamics of the interview thus become key modes of enquiry in the psychosocial analysis of authenticity.Peer-reviewedPost-prin
A numerical approach to melting in warm subduction zones.

The complex feedback between dehydration and melting in hot subduction zones is quantitatively addressed in this study. We present an integrated numerical tool that combines a high-resolution thermo-mechanical subduction model with a thermodynamic database that allows modeling metamorphic devolatilization, and subsequent re-hydration and melting reactions. We apply this tool to quantify how the hydration state of a lithologically layered subducting slab varies during interaction with the hot mantle wedge and how this affects any melting taking place in the subducting crust or the overlying mantle wedge. Total crustal dehydration is achieved before any crustal melting can occur, even in very young subducting slabs. Significant oceanic crust melting is only achieved if the metamorphic fluids from the dehydrating underlying subducting slab mantle are fluxed through the dry eclogites. But our models further demonstrate that even if the oceanic crust can melt in these specific conditions, the preceding crustal dehydration will simultaneously result in extensive mantle wedge melting at lower pressures than for colder slabs. The significant mantle wedge melting implies that also for hot subduction zones, most of the melt feeding the overriding plate is of mantle origin
Novel metals and insulators from holography.

Using simple holographic models in D = 4 spacetime dimensions we construct black hole solutions dual to d = 3 CFTs at finite charge density with a Q-lattice deformation. At zero temperature we find new ground state solutions, associated with broken translation invariance in either one or both spatial directions, which exhibit insulating or metallic behaviour depending on the parameters of the holographic theory. For low temperatures and small frequencies, the real part of the optical conductivity exhibits a power-law behaviour. We also obtain an expression for the the DC conductivity at finite temperature in terms of horizon data of the black hole solutions
Comparative analysis of conjugated alkynyl chromophore-triazacyclononane ligands for sensitized emission of europium and terbium

This article was accepted for publication in the serial, Chemistry - A European Journal [© Wiley]. It has been published in  final form\ud
at http://dx.doi.org/10.1002/chem.201402415. This article may be used for non-commercial purposes in accordance\ud
with Wiley-VCH Terms and Conditions for self-archiving.A series of europium and terbium complexes based on a functionalized triazacyclononane carboxylate or phosphinate macrocyclic ligand is described. The influence of the anionic group, that is, carboxylate, methylphosphinate, or phenylphosphinate, on the photophysical properties was studied and rationalized on the basis of DFT calculated structures. The nature, number, and position of electron-donating or electron-withdrawing aryl substituents were varied systematically within the same phenylethynyl scaffold in order to optimize the brightness of the corresponding europium complexes and investigate their two-photon absorption properties. Finally, the europium complexes were examined in cell-imaging applications, and selected terbium complexes were studied as potential oxygen sensors
The Helicobacter Eradication Aspirin Trial (HEAT): a large simple randomised controlled trial using novel methodology in primary care

BACKGROUND: Clinical trials measuring the effect of an intervention on clinical outcomes are more influential than those investigating surrogate measures but are costly. We developed methods to reduce costs substantially by using existing data in primary care systems, to ask whether Helicobacter pylori eradication would reduce the incidence of hospitalisation for ulcer bleeding in aspirin users.\ud
METHODS: The Helicobacter Eradication Aspirin Trial (HEAT) is a National Institute of Health Research-funded, double-blind placebo controlled randomised trial of the effects of H. pylori eradication on subsequent ulcer bleeding in infected individuals taking aspirin daily, conducted in practices across the whole of England, Wales and Northern Ireland. A bespoke web-based trial management system developed for the trial (and housed within the secure NHS Data Network) communicates directly with the HEAT Toolkit software downloaded at participating practices, which issues queries searching entry criteria (≥60 years, on chronic aspirin ≤325 mg daily, not on anti-ulcer therapy or non-steroidal anti-inflammatory drugs) for GP review of eligibility. Trial participation is invited using a highly secure automated online mail management system. Interested patients are seen once for consent and breath testing. Those with a positive test are randomised to eradication treatment (lansoprazole, clarithromycin,metronidazole) or placebo,with drug sent by post. Events are tracked by upload of accumulating information in the GP database, patient contact, review of National Hospital Episode Statistics and Office of National Statistics data.\ud
RESULTS: HEAT is the largest Clinical Research Network-supported drug trial, with 115,660 invitation letters sent from 850 practices, 22,922 volunteers, and 3038 H. pylori positive patients randomised to active or placebo treatment after 2.5 years of recruitment. 178 practices have performed their first follow-up data search to identify 21 potential endpoints to date.\ud
DISCUSSION: HEAT is important medically, because aspirin is so widely used, and methodologically, as a successful\ud
trial would show that large-scale studies of important clinical outcomes can be conducted at a fraction of the cost of those conducted by industry, which in turn will help to ensure that trials of primarily medical rather than commercial interest can be conducted successfully in the UK
Planck 2015 results. XII. Full Focal Plane simulations

We present the 8th Full Focal Plane simulation set (FFP8), deployed in
support of the Planck 2015 results. FFP8 consists of 10 fiducial mission
realizations reduced to 18144 maps, together with the most massive suite of
Monte Carlo realizations of instrument noise and CMB ever generated, comprising
$10^4$ mission realizations reduced to about $10^6$ maps. The resulting maps
incorporate the dominant instrumental, scanning, and data analysis effects;
remaining subdominant effects will be included in future updates. Generated at
a cost of some 25 million CPU-hours spread across multiple
high-performance-computing (HPC) platforms, FFP8 is used for the validation and
verification of analysis algorithms, as well as their implementations, and for
removing biases from and quantifying uncertainties in the results of analyses
of the real data
Inner disk clearing around the Herbig Ae star HD\,139614: Evidence for a
  planet-induced gap ?

Spatially resolving the inner dust cavity of the transitional disks is a key
to understanding the connection between planetary formation and disk dispersal.
The disk around the Herbig star HD 139614 is of particular interest since it
presents a pretransitional nature with an au-sized gap, in the dust, that was
spatially resolved by mid-IR interferometry. Using new NIR interferometric
observations, we aim to characterize the 0.1-10~au region of the HD~139614 disk
further and identify viable mechanisms for the inner disk clearing. We report
the first multiwavelength radiative transfer modeling of the interferometric
data acquired on HD~139614 with PIONIER, AMBER, and MIDI, complemented by
Herschel/PACS photometries. We confirm a gap structure in the um-sized dust,
extending from about 2.5 au to 6 au, and constrained the properties of the
inner dust component: e.g., a radially increasing surface density profile, and
a depletion of 10^3 relative to the outer disk. Since self-shadowing and
photoevaporation appears unlikely to be responsible for the au-sized gap of
HD~139614, we thus tested if dynamical clearing could be a viable mechanism
using hydrodynamical simulations to predict the gaseous disk structure. Indeed,
a narrow au-sized gap is expected when a single giant planet interacts with the
disk. Assuming that small dust grains are well coupled to the gas, we found
that a ~ 3~Mjup planet located at 4.5 au from the star could, in less than 1
Myr, reproduce most of the aspects of the dust surface density profile, while
no significant depletion in gas occurred in the inner disk, in contrast to the
dust. However, the dust-depleted inner disk could be explained by the expected
dust filtration by the gap and the efficient dust growth/fragmentation in the
inner disk regions. Our results support the hypothesis of a giant planet
opening a gap and shaping the inner region of the HD~139614 disk.Comment: Version accepted in A&A, with typos corrections in the tex
Transverse momentum spectra of b jets in pPb collisions at sqrt(s[NN]) =
  5.02 TeV

We present a measurement of b jet transverse momentum (pt) spectra in
proton-lead (pPb) collisions using a dataset corresponding to about 35 inverse
nanobarns collected with the CMS detector at the LHC. Jets from b quark
fragmentation are found by exploiting the long lifetime of hadrons containing a
b quark through tagging methods using distributions of the secondary vertex
mass and displacement. Extracted cross sections for b jets are scaled by the
effective number of nucleon-nucleon collisions and are compared to a reference
obtained from PYTHIA simulations of pp collisions. The PYTHIA-based estimate of
the nuclear modification factor is found to be 1.22 +/- 0.15 (stat + syst pPb)
+/- 0.27 (syst PYTHIA) averaged over all jets with pt between 55 and 400 GeV/c
and with abs(eta[lab]) < 2. We also compare this result to predictions from
models using perturbative calculations in quantum chromodynamics.Comment: Replaced with published version. Added journal referenc