pinecone/core-2020-05-10-deduplication huggingface dataset:
Quasi-periodic attractors, Borel summability and the Bryuno condition
  for strongly dissipative systems

We consider a class of ordinary differential equations describing
one-dimensional analytic systems with a quasi-periodic forcing term and in the
presence of damping. In the limit of large damping, under some generic
non-degeneracy condition on the force, there are quasi-periodic solutions which
have the same frequency vector as the forcing term. We prove that such
solutions are Borel summable at the origin when the frequency vector is either
any one-dimensional number or a two-dimensional vector such that the ratio of
its components is an irrational number of constant type. In the first case the
proof given simplifies that provided in a previous work of ours. We also show
that in any dimension $d$, for the existence of a quasi-periodic solution with
the same frequency vector as the forcing term, the standard Diophantine
condition can be weakened into the Bryuno condition. In all cases, under a
suitable positivity condition, the quasi-periodic solution is proved to
describe a local attractor.Comment: 10 page
Directed and Elliptic Flow in 158 AGeV Pb+Pb Collisions

Directed and elliptic flow of protons and positively charged pions has been
studied in the target fragmentation region using the Plastic Ball detector in
the WA98 experiment. The results exhibit a strong dependence on centrality,
rapidity, and transverse momentum.
  The rapidity dependence can be described by a Gaussian distribution. The
model comparisons reveal a large discrepancy of the flow strength obtained from
the data and the simulations.Comment: 4 pages, 4 eps figures, talk at Quark Matter 99, see also
  http://qgp.uni-muenster.de/WA98/qm99/flo
dHybrid: a massively parallel code for hybrid simulations of space
  plasmas

A massively parallel simulation code, called \textit{dHybrid}, has been
developed to perform global scale studies of space plasma interactions. This
code is based on an explicit hybrid model; the numerical stability and parallel
scalability of the code are studied. A stabilization method for the explicit
algorithm, for regions of near zero density, is proposed. Three-dimensional
hybrid simulations of the interaction of the solar wind with unmagnetized
artificial objects are presented, with a focus on the expansion of a plasma
cloud into the solar wind, which creates a diamagnetic cavity and drives the
Interplanetary Magnetic Field out of the expansion region. The dynamics of this
system can provide insights into other similar scenarios, such as the
interaction of the solar wind with unmagnetized planets.Comment: 15 pages, 6 figures, accepted for publication in Computer Physics
  Communication
Tumor-specific T cells in human Merkel cell carcinomas: a possible role for Tregs and T cell exhaustion in reducing T cell responses

Merkel cell carcinomas (MCC) are rare but highly malignant skin cancers associated with a novel polyomavirus. MCC tumors were infiltrated by T cells, including effector, central memory and regulatory T cells. Infiltrating T cells showed markedly reduced activation as evidenced by reduced expression of CD69 and CD25. Treatment of MCC tumors in vitro with IL-2 and IL-15 led to T cell activation, proliferation, enhanced cytokine production and loss of viable tumor cells from cultures. Expanded tumor-infiltrating lymphocytes showed TCR repertoire skewing and upregulation of CD137. MCC tumors implanted into immunodeficient mice failed to grow unless human T cells in the tumor grafts were depleted with denileukin diftitox, suggesting tumor-specific T cells capable of controlling tumor growth were present in MCC. Both CD4+ and CD8+ FOXP3+ regulatory T cells were frequent in MCC. 50% of non-activated T cells in MCC expressed PD-1, a marker of T-cell exhaustion, and PD-L1 and PD-L2 were expressed by a subset of tumor dendritic cells and macrophages. In summary, we observed tumor-specific T cells with suppressed activity in MCC tumors. Agents that stimulate T cell activity, block Treg function or inhibit PD-1 signaling may be effective in the treatment of this highly malignant skin cancer
Brief report: Suggestibility, compliance and psychological traits in high-functioning adults with autism spectrum disorder

Individuals with autism spectrum disorder (ASD) may be over-represented within the criminal justice system; it is therefore important to understand how they fare under police questioning. The present study examined interrogative suggestibility and compliance in individuals with ASD, and whether this is associated with certain psychological traits. Adults with ASD and their typical counterparts completed the Gudjonsson Suggestibility Scales (GSS), Gudjonsson Compliance Scale (GCS), and measures of state-trait anxiety, self-esteem, fear of negative evaluation by others and paranoia. In contrast to previous research (North, Russell, & Gudjonsson, 2008), there was no difference between the ASD and comparison groups on the measure of compliance, and groups also did not differ on any of the GSS measures, despite the ASD group reporting significantly higher paranoia. Findings indicate that individuals with ASD may be no more likely to succumb to interrogative pressures than their typical counterparts
The effect of delay in collection and processing on RNA integrity in human placenta : experiences from rural Africa

Open Access funded by Medical Research Council Under a Creative Commons license The ENID Trial is funded by the UK Medical Research Council (core funding to the MRC International Nutrition Group; MC-A760-5QX00). This study was further supported by the Scottish Government (Rural and Environmental Sciences and Analytical Services). The authors are grateful to Dr Helen Hayes for technical assistance and are especially grateful to the mothers and the ENID Trial staff who made this study possible. SEM conceived and designed the original ENID Trial. SEM and HJM conceived the sub-study on placental development. MLJ co-ordinated all the field work, supervised all laboratory processing in The Gambia, conducted all experimental work in Aberdeen, performed statistical analyses and wrote the first draft of the paper. CK and LG supervised all laboratory work in Aberdeen. All authors contributed to the final version of the paper. None of the authors had a conflict of interest to report.Peer reviewedPublisher PD
Measurement of the Z gamma production cross section in pp collisions at
  8 TeV and search for anomalous triple gauge boson couplings

The cross section for the production of Z gamma in proton-proton collisions
at 8 TeV is measured based on data collected by the CMS experiment at the LHC
corresponding to an integrated luminosity of 19.5 inverse femtobarns. Events
with an oppositely-charged pair of muons or electrons together with an isolated
photon are selected. The differential cross section as a function of the photon
transverse momentum is measured inclusively and exclusively, where the
exclusive selection applies a veto on central jets. The observed cross sections
are compatible with the expectations of next-to-next-to-leading-order quantum
chromodynamics. Limits on anomalous triple gauge couplings of Z Z gamma and Z
gamma gamma are set that improve on previous experimental results obtained with
the charged lepton decay modes of the Z boson.Comment: Replaced with published version. Added journal reference and DO
Re-examining sin(2beta) and Delta m(d) from evolution of B(d) mesons
  with decoherence

In the time evolution of neutral meson systems, a perfect quantum coherence
is usually assumed. The important quantities of the B(d) system, such as sin
(2beta) and Delta m(d), are determined under this assumption. However, the
meson system interacts with its environment. This interaction can lead to
decoherence in the mesons even before they decay. In our formalism this
decoherence is modelled by a single parameter lambda. It is desirable to
re-examine the procedures of determination of sin(2beta) and Delta m(d) in
meson systems with decoherence. We find that the present values of these two
quantities are modulated by lambda. Re-analysis of B(d) data from B-factories
and LHCb can lead to a clean determination of lambda, sin(2beta) and Delta
m(d).Comment: Version accepted for publication in Physics Letters
Defying jet-gas alignment in two radio galaxies at z~2 with extended
  light profiles: Similarities to brightest cluster galaxies

We report the detection of extended warm ionized gas in two powerful
high-redshift radio galaxies, NVSS J210626-314003 at z=2.10 and TXS 2353-003 at
z=1.49, that does not appear to be associated with the radio jets. This is
contrary to what would be expected from the alignment effect, a characteristic
feature of distant, powerful radio galaxies at z> 0.6. The gas also has smaller
velocity gradients and line widths than most other high-z radio galaxies with
similar data. Both galaxies are part of a systematic study of 50 high-redshift
radio galaxies with SINFONI, and are the only two that are characterized by the
presence of high surface-brightness gas not associated with the jet axis and by
the absence of such gas aligned with the jet. Both galaxies are spatially
resolved with ISAAC broadband imaging covering the rest-frame R band, and have
extended wings that cannot be attributed to line contamination. We argue that
the gas and stellar properties of these galaxies are more akin to gas-rich
brightest cluster galaxies in cool-core clusters than the general population of
high-redshift radio galaxies at z>2. In support of this interpretation, one of
our sources, TXS 2353-003, for which we have H\alpha\ narrowband imaging, is
associated with an overdensity of candidate H\alpha\ emitters by a factor of 8
relative to the field at z=1.5. We discuss possible scenarios of the
evolutionary state of these galaxies and the nature of their emission line gas
within the context of cyclical AGN feedback.Comment: A&A in pres
Search for strong production of supersymmetric particles in final states with missing transverse momentum and at least three b-jets at √s= 8 TeV proton-proton collisions with the ATLAS detector

This paper reports the results of a search for strong production of supersymmetric\ud
particles in 20.1 fb−1 of proton-proton collisions at a centre-of-mass energy of 8TeV\ud
using the ATLAS detector at the LHC. The search is performed separately in events with\ud
either zero or at least one high-pT lepton (electron or muon), large missing transverse\ud
momentum, high jet multiplicity and at least three jets identified as originated from the\ud
fragmentation of a b-quark. No excess is observed with respect to the Standard Model\ud
predictions. The results are interpreted in the context of several supersymmetric models\ud
involving gluinos and scalar top and bottom quarks, as well as a mSUGRA/CMSSM\ud
model. Gluino masses up to 1340 GeV are excluded, depending on the model, significantly\ud
extending the previous ATLAS limits
Gymnasts and orienteers display better mental rotation performance than nonathletes

The aim of this study was to examine whether athletes differ from nonathletes regarding their mental rotation performance. Furthermore, it investigated whether athletes doing sports requiring distinguishable levels of mental rotation (orienteering, gymnastics, running), as well as varying with respect to having an egocentric (gymnastics) or an allocentric perspective (orienteering), differ from each other. Therefore, the Mental Rotations Test (MRT) was carried out with 20 orienteers, 20 gymnasts, 20 runners, and 20 nonathletes. The results indicate large differences in mental rotation performance, with those actively doing sports outperforming the nonathletes. Analyses for the specific groups showed that orienteers and gymnasts differed from the nonathletes, whereas endurance runners did not. Contrary to expectations, the mental rotation performance of gymnasts did not differ from that of orienteers. This study also revealed gender differences in favor of men. Implications regarding a differentiated view of the connection between specific sports and mental rotation performance are discussed
Measurement of the t-channel single-top-quark production cross section and of the |Vtb| CKM matrix element in pp collisions at $\sqrt{s}$ = 8 TeV

Measurements are presented of the t-channel single-top-quark production cross section in proton-proton collisions at s√ = 8 TeV. The results are based on a data sample corresponding to an integrated luminosity of 19.7 fb−1 recorded with the CMS detector at the LHC. The cross section is measured inclusively, as well as separately for top (t) and antitop (t¯) , in final states with a muon or an electron. The measured inclusive t-channel cross section is σ t-ch. = 83.6 ± 2.3 (stat.) ± 7.4 (syst.) pb. The single t and t¯ cross sections are measured to be σ t-ch.(t) = 53.8 ± 1.5 (stat.) ± 4.4 (syst.) pb and σ t-ch. (t¯) = 27.6 ± 1.3 (stat.) ± 3.7 (syst.) pb, respectively. The measured ratio of cross sections is R t-ch. = σ t-ch.(t)/σ t-ch. (t¯) = 1.95 ± 0.10 (stat.) ± 0.19 (syst.), in agreement with the standard model prediction. The modulus of the Cabibbo-Kobayashi-Maskawa matrix element V tb is extracted and, in combination with a previous CMS result at s√ = 7 TeV, a value |V tb| = 0.998 ± 0.038 (exp.) ± 0.016 (theo.) is obtained
On the Yang–Baxter equation for the six-vertex model

In this paper we review the theory of the Yang–Baxter equation related to the 6-vertex model and its higher spin generalizations. We employ a 3D approach to the problem. Starting with the 3D R -matrix, we consider a two-layer projection of the corresponding 3D lattice model. As a result, we obtain a new expression for the higher spin R -matrix associated with the affine quantum algebra <math altimg="si1.gif" xmlns="http://www.w3.org/1998/Math/MathML"><msub><mrow><mi>U</mi></mrow><mrow><mi>q</mi></mrow></msub><mo stretchy="false">(</mo><mover accent="true"><mrow><mi>s</mi><mi>l</mi><mo stretchy="false">(</mo><mn>2</mn><mo stretchy="false">)</mo></mrow><mrow><mo>ˆ</mo></mrow></mover><mo stretchy="false">)</mo></math> . In the simplest case of the spin <math altimg="si2.gif" xmlns="http://www.w3.org/1998/Math/MathML"><mi>s</mi><mo>=</mo><mn>1</mn><mo stretchy="false">/</mo><mn>2</mn></math> this R -matrix naturally reduces to the R -matrix of the 6-vertex model. Taking a special limit in our construction we also obtain new formulas for the Q -operators acting in the representation space of arbitrary (half-)integer spin. Remarkably, this construction can be naturally extended to any complex values of spin s . We also give all functional equations satisfied by the transfer-matrices and Q -operators
Detecting the upturn of the solar 8 B neutrino spectrum with LENA

LENA ( L ow E nergy N eutrino A stronomy) has been proposed as a next generation 50 kt liquid scintillator detector. The large target mass allows a high precision measurement of the solar 8 B neutrino spectrum, with an unprecedented energy threshold of 2 MeV. Hence, it can probe the MSW-LMA prediction for the electron neutrino survival probability in the transition region between vacuum and matter-dominated neutrino oscillations. Based on Monte Carlo simulations of the solar neutrino and the corresponding background spectra, it was found that the predicted upturn of the solar 8 B neutrino spectrum can be detected with 5 σ significance after 5 years
Reanalyzing the upper limit on the tensor-to-scalar perturbation ratio rT in a quartic potential inflationary model

We study the polynomial chaotic inflation model with a single scalar field in a double well quartic potential which has recently been shown to be consistent with Planck data. In particular, we study the effects of lifting the degeneracy between the two vacua on the inflationary observables, i.e., spectral index ns and tensor-to-scalar perturbation ratio rT . We find that removing the degeneracy allows the model to satisfy the upper limit constraints on rT from Planck data, provided the field starts near the local maximum. We also calculate the scalar power spectrum and non-Gaussianity parameter fNL for the primordial scalar perturbations in this model
Higher spin AdS 3 holography with extended supersymmetry

We propose a holographic duality between a higher spin AdS 3 gravity with so( p ) extended supersymmetry and a large N limit of a 2-dimensional Grassmannian-like model with a specific critical level k = N and a non-diagonal modular invariant. As evidence, we show the match of one-loop partition functions. Moreover, we construct symmetry generators of the coset model for low spins which are dual to gauge fields in the supergravity. Further, we discuss a possible relation to superstring theory by noticing an N = 3 $$ \mathcal{N}=3 $$ supersymmetry of critical level model at finite k, N . In particular, we examine BPS states and marginal deformations. Inspired by the supergravity side, we also propose and test another large N CFT dual obtained as a ℤ 2 $$ {\mathrm{\mathbb{Z}}}_2 $$ automorphism truncation of a similar coset model, but at a non-critical level
Non-linear Q -clouds around Kerr black holes

Q - balls are regular extended ‘objects’ that exist for some non-gravitating, self-interacting, scalar field theories with a global, continuous, internal symmetry, on Minkowski spacetime. Here, analogous objects are also shown to exist around rotating (Kerr) black holes, as non-linear bound states of a test scalar field. We dub such configurations Q - clouds . We focus on a complex massive scalar field with quartic plus hexic self-interactions. Without the self-interactions, linear clouds have been shown to exist, in synchronous rotation with the black hole horizon, along 1-dimensional subspaces – existence lines – of the Kerr 2-dimensional parameter space. They are zero modes of the superradiant instability. Non-linear Q -clouds, on the other hand, are also in synchronous rotation with the black hole horizon; but they exist on a 2-dimensional subspace, delimited by a minimal horizon angular velocity and by an appropriate existence line, wherein the non-linear terms become irrelevant and the Q -cloud reduces to a linear cloud. Thus, Q -clouds provide an example of scalar bound states around Kerr black holes which, generically, are not zero modes of the superradiant instability. We describe some physical properties of Q -clouds, whose backreaction leads to a new family of hairy black holes, continuously connected to the Kerr family
Extrapolation and unitarity bounds for the B → π form factor

We address the problem of extrapolating the vector form factor f Bπ + , which is relevant to B → πℓν ℓ decays, from the region of small to the region of large momentum transfer. As input, we use the QCD light-cone sum rule at small momentum transfer. We carry out a comprehensive Bayesian uncertainty analysis and obtain correlated uncertainties for the normalization and shape parameters of the form factor. The z -series parametrization for f Bπ + is employed to extrapolate our results to large momentum transfer, and to compare with the lattice QCD results. To test the validity of our extrapolation we use the upper and lower bounds from the unitarity and positivity of the two-point correlator of heavy-light quark currents. This correlator is updated by including the NNLO perturbative term and the NLO correction to the quark condensate contribution. We demonstrate that an additional input including the form factor, its first and second derivative calculated at one value of momentum transfer from the light-cone sum rules, considerably improves the bounds. This only holds when the correlations between the form factor parameters are taken into account. We further combine our results with the latest experimental measurements of B → πℓν ℓ by the BaBar and Belle collaborations, and obtain | V ub | = (3. 32 − 0.22 + 0.26 ) ⋅ 10 − 3 from a Bayesian analysis
Contemporaneous observations of the radio galaxy NGC 1275 from radio to
  very high energy gamma-rays

The radio galaxy NGC 1275, recently identified as a very high energy (VHE,
>100 GeV) gamma-ray emitter by MAGIC, is one of the few non-blazar AGN detected
in the VHE regime. In order to better understand the origin of the gamma-ray
emission and locate it within the galaxy, we studied contemporaneous
multi-frequency observations of NGC 1275 and modeled the overall spectral
energy distribution (SED). We analyzed unpublished MAGIC observations carried
out between Oct. 2009 and Feb. 2010, and the previously published ones taken
between Aug. 2010 and Feb. 2011. We studied the multi-band variability and
correlations by analyzing data of Fermi-LAT (0.1-100 GeV), as well as Chandra
(X-ray), KVA (optical) and MOJAVE (radio) data taken during the same period.
Using customized Monte Carlo simulations corresponding to early MAGIC stereo
data, we detect NGC 1275 also in the earlier campaign. The flux level and
energy spectra are similar to the results of the second campaign. The monthly
light curve >100 GeV shows a hint of variability at the 3.6 sigma level. In the
Fermi-LAT band, both flux and spectral shape variabilities are reported. The
optical light curve is variable and shows a clear correlation with the
gamma-ray flux >100 MeV. In radio, 3 compact components are resolved in the
innermost part of the jet. One of them shows a similar trend as the LAT and KVA
light curves. The 0.1-650 GeV spectra measured simultaneously with MAGIC and
Fermi-LAT can be well fitted either by a log-parabola or by a power-law with a
sub-exponential cutoff for both campaigns. A single-zone
synchrotron-self-Compton model, with an electron spectrum following a power-law
with an exponential cutoff, can explain the broadband SED and the multi-band
behavior of the source. However, this model suggests an untypical low
bulk-Lorentz factor or a velocity alignment closer to the line of sight than
the pc-scale radio jet
Surface nitrate utilization in the Bering sea since 180kA BP: Insight from sedimentary nitrogen isotopes

© 2015. We present high-resolution records of sedimentary nitrogen (δ15Nbulk) and carbon isotope ratios (δ13Cbulk) from piston core SO201-2-85KL located in the western Bering Sea. The records reflect changes in surface nitrate utilization and terrestrial organic matter contribution in submillennial resolution that span the last 180kyr. The δ15Nbulk record is characterized by a minimum during the penultimate interglacial indicating low nitrate utilization (~62-80%) despite the relatively high export production inferred from opal concentrations along with a significant reduction in the terrestrial organic matter fraction (m terr). This suggests that the consumption of the nitrate pool at our site was incomplete and even more reduced than today (~84%). δ15Nbulk increases from Marine Isotope Stage (MIS) 5.4 and culminates during the Last Glacial Maximum, which indicates that nitrate utilization in the Bering Sea was raised during cold intervals (MIS 5.4, 5.2, 4) and almost complete during MIS 3 and 2 (~93-100%). This is in agreement with previous hypotheses suggesting that stronger glacial stratification reduced the nutrient supply from the subeuphotic zone, thereby increasing the iron-to-nutrient ratio and therefore the nitrate utilization in the mixed surface layer. Large variations in δ15Nbulk were also recorded from 180 to 130ka BP (MIS 6), indicating a potential link to insolation and sea-level forcing and its related feedbacks. Millennial-scale oscillations were observed in δ15Nbulk and δ13Cbulk that might be related to Greenland interstadials.postprin