pinecone/core-2020-05-10-deduplication huggingface dataset:
Enhanced ionic conductivity in nano-composite solid polymer electrolyte: (PEG)x LiBr: y(SiO2)

In this paper, we report an enhancement in ionic conductivity in a new nano-composite solid polymer electrolyte namely, (PEG)x LiBr: y(SiO2). The samples were prepared, characterized, and investigated by XRD, IR, NMR, and impedance spectroscopy. Conductivity as a function of salt concentration shows a double peak. Five weight percent addition of silica nanoparticles increases the ionic conductivity by two orders of magnitude. Conductivity exhibits an Arrhenius type dependence on temperature. IR study has shown that the existence of nanoparticles in the vicinity of terminal O―H group results in a shift in IR absorption frequency and increase in amplitude of vibration of the terminal O―H group. This might lead to an enhancement in conductivity due to increased segmental motion of the polymer. 7Li NMR spectroscopic studies also seem to support this. Thus addition of nanoparticle inert fillers still seems to be a promising technique to enhance the ionic conductivity in solid polymer electrolytes
Structure of Herbig AeBe disks at the milliarcsecond scale A statistical
  survey in the H band using PIONIER-VLTI

Context. It is now generally accepted that the near-infrared excess of Herbig
AeBe stars originates in the dust of a circumstellar disk. Aims. The aims of
this article are to infer the radial and vertical structure of these disks at
scales of order one au, and the properties of the dust grains. Methods. The
program objects (51 in total) were observed with the H-band (1.6micron)
PIONIER/VLTI interferometer. The largest baselines allowed us to resolve (at
least partially) structures of a few tenths of an au at typical distances of a
few hundred parsecs. Dedicated UBVRIJHK photometric measurements were also
obtained. Spectral and 2D geometrical parameters are extracted via fits of a
few simple models: ellipsoids and broadened rings with azimuthal modulation.
Model bias is mitigated by parallel fits of physical disk models. Sample
statistics were evaluated against similar statistics for the physical disk
models to infer properties of the sample objects as a group. Results. We find
that dust at the inner rim of the disk has a sublimation temperature
Tsub~1800K. A ring morphology is confirmed for approximately half the resolved
objects; these rings are wide delta_r>=0.5. A wide ring favors a rim that, on
the star-facing side, looks more like a knife edge than a doughnut. The data
are also compatible with a the combination of a narrow ring and an inner disk
of unspecified nature inside the dust sublimation radius. The disk inner part
has a thickness z/r~0.2, flaring to z/r~0.5 in the outer part. We confirm the
known luminosity-radius relation; a simple physical model is consistent with
both the mean luminosity-radius relation and the ring relative width; however,
a significant spread around the mean relation is present. In some of the
objects we find a halo component, fully resolved at the shortest interferometer
spacing, that is related to the HAeBe class.Comment: 41 pages. 23 figures. Four appendice
Faraday tomography of the local interstellar medium with LOFAR: Galactic
  foregrounds towards IC342

The new generation of low-frequency radio telescopes, such as the Low
Frequency Array (LOFAR: a Square Kilometre Array-low pathfinder), provides
advancements in our capability of probing Galactic magnetism through
low-frequency polarimetry. Maps of diffuse polarized radio emission and Faraday
rotation can be used to infer properties of, and trace structure in, the
magnetic fields in the ISM. However, to date very little of the sky has been
probed at high angular and Faraday depth resolution. We observed a 5x5 degree
region centred on the nearby galaxy IC342 using LOFAR in the frequency range
115-178 MHz at 4 arcmin resolution and performed Faraday tomography to detect
foreground Galactic polarized synchrotron emission separated by Faraday depth
(different amounts of Faraday rotation). Our Faraday depth cube shows rich
polarized structure, with up to 30 K of polarized emission at 150 MHz. We
detect two overlapping diffuse polarized features that are clearly separated in
Faraday depth. Faraday-thick structures at such low frequencies would be too
strongly depolarized to explain the observations and are therefore rejected.
Only Faraday thin structures will not be strongly depolarized; producing such
structures requires localized variations in the ratio of synchrotron emissivity
to Faraday depth per unit distance, which can arise from several physical
phenomena, such as a transition between regions of ionized and neutral gas. We
conclude that the observed polarized emission is Faraday thin, and propose that
the emission originates from two neutral clouds in the local ISM. We have
modeled the Faraday rotation for this line of sight and estimated that the line
of sight component of magnetic field of the local ISM for this direction varies
between -0.86 and +0.12 uG. We propose that this may be a useful method for
mapping magnetic fields within the local ISM.Comment: 17 pages, 12 figures, accepted for publication in A&
Measurements of top quark spin observables in $t\bar{t}$ events using
  dilepton final states in $\sqrt{s} = 8$ TeV $pp$ collisions with the ATLAS
  detector

Measurements of top quark spin observables in $t\bar{t}$ events are presented
based on 20.2 fb$^{-1}$ of $\sqrt{s} = 8$ TeV proton-proton collisions recorded
with the ATLAS detector at the LHC. The analysis is performed in the dilepton
final state, characterised by the presence of two isolated leptons (electrons
or muons). There are 15 observables, each sensitive to a different coefficient
of the spin density matrix of $t\bar{t}$ production, which are measured
independently. Ten of these observables are measured for the first time. All of
them are corrected for detector resolution and acceptance effects back to the
parton and stable-particle levels. The measured values of the observables at
parton level are compared to Standard Model predictions at next-to-leading
order in QCD. The corrected distributions at stable-particle level are
presented and the means of the distributions are compared to Monte Carlo
predictions. No significant deviation from the Standard Model is observed for
any observable.Comment: 50 pages in total, author list starting page 34, 8 figures, 7 tables,
  submitted to JHEP, All figures including auxiliary figures are available at
  https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2015-1
Real-time monitoring of wind turbine generator shaft alignment using laser measurement.

Shaft Misalignment is one of the most common sources of trouble of wind turbine drive train when rigid couplings connect the shafts. Ideal alignment of the shaft is difficult to be obtained and the couplings attached to the shaft may present angular or parallel misalignment defined also as lateral and axially misalignment. Despite misalignment is often observed in the practice, there are relatively few studies on wind turbine shaft misalignment in the literature and their results are sometimes conflicting. The aim of this research is to use laser based metrology techniques to capture the positional changes of wind turbines in service and aligning drivelines in wind turbine. By using sets of lasers on a shaft alignment rig, and then determining the average and periodic amplitude from an ensemble averaged signal, the degree of misalignment can be found and the necessary corrective action found
Changes in time-segment specific physical activity between ages 10 and 14 years:A longitudinal observational study

Objectives: Describe (1) time-segment specific changes in physical activity (PA) into adolescence, (2) differences in change in PA between specific time-segments (weekdays-weekends, in-school-out-of-school, out-of-school-weekends, lesson-time-lunch-time), and (3) associations of change in time-segment specific with overall PA. Design: Longitudinal observational study (4-year follow-up). Methods: Children from the SPEEDY study (n=769, 42% boys) had PA measured by accelerometer for at least three days at ages 10.2±0.3, 11.2±0.3 and 14.3±0.3years. Changes in moderate-to-vigorous PA (ΔMVPA, minutes ≥2000counts/minute [cpm]) and total PA (ΔTPA, average cpm) during weekdays, weekends, in-school, out-of-school, lesson-times and lunch-times, were tested using three level (age, individual, school) mixed-effects linear regression. Differences in ΔMVPA/ΔTPA between time-segments were tested using time-segment×age interaction terms. Associations of four-year time-segment specific ΔMVPA/ΔTPA with four-year overall ΔMVPA/ΔTPA were tested using two level (time-segment specific ΔMVPA/ΔTPA, school) mixed-effects linear regression. Results: MVPA and TPA declined in all time-segments, except lesson-time MVPA. Annual ΔMVPA and, for boys only, ΔTPA was greater on weekends than weekdays (beta±SE for interaction term: boys, -3.53±0.83min, -29.64±7.64cpm; girls, -2.20±0.64min) and out-of-school (boys, -4.36±0.79min, -19.36±8.46cpm; girls, -2.44±0.63min). ΔMVPA and ΔTPA during lunch-time was greater than during lesson-time (boys, -0.96±0.20min, -36.43±6.55cpm; girls, -0.90±0.13min, -38.72±4.40cpm). ΔTPA was greater out-of-school than in-school (boys, -19.89±6.71cpm; girls, -18.46±6.51cpm). For all time-segments, four-year ΔMVPA/ΔTPA was positively associated with four-year overall ΔMVPA/ΔTPA (all p<0.042), except for girl's in-school and lunch-time TPA. Conclusions: Interventions focused on PA maintenance could target all time-segments, but weekends and out-of-school may be particularly advantageous due to the relatively large declines observed
The expanding role of primary care in cancer control

This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record.The nature of cancer control is changing, with an increasing emphasis, fuelled by public and political demand, on prevention, early diagnosis, and patient experience during and after treatment. At the same time, primary care is increasingly promoted, by governments and health funders worldwide, as the preferred setting for most health care for reasons of increasing need, to stabilise health-care costs, and to accommodate patient preference for care close to home. It is timely, then, to consider how this expanding role for primary care can work for cancer control, which has long been dominated by highly technical interventions centred on treatment, and in which the contribution of primary care has been largely perceived as marginal. In this Commission, expert opinion from primary care and public health professionals with academic and clinical cancer expertise—from epidemiologists, psychologists, policy makers, and cancer specialists—has contributed to a detailed consideration of the evidence for cancer control provided in primary care and community care settings. Ranging from primary prevention to end-of-life care, the scope for new models of care is explored, and the actions needed to effect change are outlined. The strengths of primary care—its continuous, coordinated, and comprehensive care for individuals and families—are particularly evident in prevention and diagnosis, in shared follow-up and survivorship care, and in end-of-life care. A strong theme of integration of care runs throughout, and its elements (clinical, vertical, and functional) and the tools needed for integrated working are described in detail. All of this change, as it evolves, will need to be underpinned by new research and by continuing and shared multiprofessional development.GL is supported by a Cancer Research UK Clinician Scientist Fellowship(A18180). RDN receives funding from Public Health Wales and Betsi Cadwaladr University Health Board. We thank Christina Dobson for managing the references
Chemokine (C-C Motif) Receptor 2 Mediates Dendritic Cell Recruitment to the Human Colon but Is Not Responsible for Differences Observed in Dendritic Cell Subsets, Phenotype, and Function Between the Proximal and Distal Colon

Acknowledgments The authors thank the Wellcome Trust Sanger Institute’s core sequencing teams for generating sequence data. Funding This study was funded by the Biotechnology and Biological Sciences Research Council, BBSRC Institute Strategic Programme for Gut Health and Food Safety, grant BB/J004529/1; 16S rRNA gene sequencing was provided by the Wellcome Trust (grant number WT 098051) (to P.S., J.P., A.W.W.); core funding support from the Scottish Government Rural and Environmental Science and Analysis Service (to A.W.W. and the Rowett Institute of Nutrition and Health, University of Aberdeen); the Association for International Cancer Research (AICR), Scotland, grant number 120234 (to H.O.A.); and the Junta de Castilla y León, Spain (SAN196/VA16/07 and SAN196/VA17/07).Peer reviewedPublisher PD
Measurement of the cross section for the production of a W boson in association with b-jets in pp collisions at root s = 7 TeV with the ATLAS detector

A measurement is presented of the cross section for the production of a W boson with one or two jets, of which at least one must be a b-jet, in pp collisions at √s = 7 TeV. Production via top decay is not included in the signal definition. The measurement is based on 35 pb⁻¹ of data collected with the ATLAS detector at the LHC. The W + b-jet cross section is defined for jets reconstructed with the antikt clustering algorithm with transverse momentum above 25 GeV and rapidity within ±2.1. The b-jets are identified by reconstructing secondary vertices. The fiducial cross section is measured both for the electron and muon decay channel of the W boson and is found to be 10.2 ± 1.9(stat) ± 2.6(syst) pb for one lepton flavour. The results are compared with next-to-leading order QCD calculations, which predict a cross section smaller than, though consistent with, the measured value.G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... N. Soni ... M. J. White ... et al. (ATLAS Collaboration
Search for heavy vector-like quarks coupling to light quarks in proton-proton collisions at root s = 7 TeV with the ATLAS detector

This Letter presents a search for singly produced vector-like quarks, Q, coupling to light quarks, q . The search is sensitive to both charged current (CC) and neutral current (NC) processes, pp→Qq→Wqq' and pp→Qq→Zqq′ with a leptonic decay of the vector gauge boson. In 1.04 fb⁻¹ of data taken in 2011 by the ATLAS experiment at a center-of-mass energy √s = 7 TeV, no evidence of such heavy vector-like quarks is observed above the expected Standard Model background. Limits on the heavy vector-like quark production cross section times branching ratio as a function of mass mQ are obtained. For a coupling κqQ=v/mQ, where v is the Higgs vacuum expectation value, 95% C.L. lower limits on the mass of a vector-like quark are set at 900 GeV and 760 GeV from CC and NC processes, respectively.G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... N. Soni ... M.J. White ... et al. (ATLAS Collaboration
Influence of Evaluation System on Effectiveness of Foreign Students' Mathematical Education

This paper studies the problems of improving the quality of mathematics education of foreign students in Tomsk Polytechnic University. We found out that changes in the evaluation system had provided students progress in studying math. The effectiveness of point rating system introduction is proved according to statistics over the last 5 years. The research involved the application of mathematical statistics, correlation analysis and variance analysis methods. Influence of different evaluation systems on the final grade is shown. We worked out that the studying time started to be used more rationally and the students’ activity increased during the term. Observational results showed a higher level of motivation, orderliness and responsibility. Assessment of the permanent knowledge confirmed the expected results
Dark matter interpretations of ATLAS searches for the electroweak production of supersymmetric particles in √s=8 TeV proton-proton collisions

A selection of searches by the ATLAS experiment at the LHC for the electroweak production of SUSY particles are used to study their impact on the constraints on dark matter candidates. The searches use 20 fb−1 of proton-proton collision data at s√=8 TeV. A likelihood-driven scan of a five-dimensional effective model focusing on the gaugino-higgsino and Higgs sector of the phenomenological minimal supersymmetric Standard Model is performed. This scan uses data from direct dark matter detection experiments, the relic dark matter density and precision flavour physics results. Further constraints from the ATLAS Higgs mass measurement and SUSY searches at LEP are also applied. A subset of models selected from this scan are used to assess the impact of the selected ATLAS searches in this five-dimensional parameter space. These ATLAS searches substantially impact those models for which the mass m(χ~01) of the lightest neutralino is less than 65 GeV, excluding 86% of such models. The searches have limited impact on models with larger m(χ~01) due to either heavy electroweakinos or compressed mass spectra where the mass splittings between the produced particles and the lightest supersymmetric particle is small
Chlorination of RuO2 with gaseous Cl2 between 998 and 1123K

AbstractEmploying methods of separation based on selective chlorination it is possible to separate valuable components, such as metals and rare earths, from ores and / or solid wastes. In this paper we study the chlorination reaction of ruthenium oxide. This element is among nuclear fission products, also part of many electronic wastes and numerous catalysts in the chemical industry. The study of the chlorination reaction of ruthenium oxide will allow to analyze in which conditions it is possible to apply gaseous chlorination for ruthenium recovery. No systematic studies on the kinetics and chemical mechanism of ruthenium oxide chlorination are available in the literature. In the present study, we performed a thermodynamic analysis of possible reaction pathways. The reaction products were identified by scanning electron microscopy (SEM) and x-ray Diffraction (xrd), and the experimental conditions for obtaining stable α-RuCl3 by RuO2 chlorination and subsequent heating in Cl2 were established. The starting temperature for the chlorination was determined at 983K. The observed mass loss is due to formation of volatile products. We analyzed the effects of gas flow rate, crucible geometry, and sample mass on the kinetics of the reaction, in order to establish the corresponding experimental reaction conditions for chemical kinetic control. The effect of temperature was analyzed and an apparent activation energy of 173 ± 8kJ.mol-1 was obtained for the chlorination reaction
Search for a narrow baryonic state decaying to pKS0 and p‾KS0 in deep inelastic scattering at HERA

AbstractA search for a narrow baryonic state in the pKS0 and p‾KS0 system has been performed in ep collisions at HERA with the ZEUS detector using an integrated luminosity of 358pb−1 taken in 2003–2007. The search was performed with deep inelastic scattering events at an ep centre-of-mass energy of 318GeV for exchanged photon virtuality, Q2, between 20 and 100GeV2. Contrary to evidence presented for such a state around 1.52 GeV in a previous ZEUS analysis using a sample of 121 pb−1 taken in 1996–2000, no resonance peak was found in the p(p‾)KS0 invariant-mass distribution in the range 1.45–1.7 GeV. Upper limits on the production cross section are set
Search for the a0(980)–f0(980) mixing in weak decays of Ds/Bs mesons

AbstractScalar mesons a00(980) and f0(980) can mix with each other through isospin violating effects, and the mixing intensity has been predicted at the percent level in various theoretical models. However the mixing has not been firmed established on the experimental side to date. In this work we explore the possibility to extract the a0–f0 mixing intensity using weak decays of heavy mesons: Ds→[π0η,π+π−]e+ν, Bs→[π0η,π+π−]ℓ+ℓ− and the Bs→J/ψ[π0η,π+π−] decays. Based on the large amount of data accumulated by various experimental facilities including BEPC-II, LHC, Super KEKB and the future colliders, we find that the a0–f0 mixing intensity might be determined to a high precision, which will lead to a better understanding of the nature of scalar mesons
Hunting for the Xb via radiative decays

AbstractIn this paper, we study radiative decays of Xb, the counterpart of the famous X(3872) in the bottomonium-sector as a candidate for meson–meson molecule, into the γϒ(nS) (n=1,2,3). Since it is likely that the Xb is below the BB¯⁎ threshold and the mass difference between the neutral and charged bottom meson is small compared to the binding energy of the Xb, the isospin violating decay mode Xb→ϒ(nS)π+π− would be greatly suppressed. This will promote the importance of the radiative decays. We use the effective Lagrangian based on the heavy quark symmetry to explore the rescattering mechanism and calculate the partial widths. Our results show that the partial widths into γϒ(nS) are about 1 keV, and thus the branching fractions may be sizeable, considering the fact the total width may also be smaller than a few MeV like the X(3872). These radiative decay modes are of great importance in the experimental search for the Xb particularly at hadron collider. An observation of the Xb will provide a deeper insight into the exotic hadron spectroscopy and is helpful to unravel the nature of the states connected by the heavy quark symmetry
Fetal–maternal interface impedance parallels local NADPH oxidase related superoxide production

AbstractBlood flow assessment employing Doppler techniques is a useful procedure in pregnancy evaluation, as it may predict pregnancy disorders coursing with increased uterine vascular impedance, as pre-eclampsia. While the local causes are unknown, emphasis has been put on reactive oxygen species (ROS) excessive production. As NADPH oxidase (NOX) is a ROS generator, it is hypothesized that combining Doppler assessment with NOX activity might provide useful knowledge on placental bed disorders underlying mechanisms.A prospective longitudinal study was performed in 19 normal course, singleton pregnancies. Fetal aortic isthmus (AoI) and maternal uterine arteries (UtA) pulsatility index (PI) were recorded at two time points: 20–22 and 40–41 weeks, just before elective Cesarean section. In addition, placenta and placental bed biopsies were performed immediately after fetal extraction.NOX activity was evaluated using a dihydroethidium-based fluorescence method and associations to PI values were studied with Spearman correlations. A clustering of pregnancies coursing with higher and lower PI values was shown, which correlated strongly with placental bed NOX activity, but less consistently with placental tissue.The study provides evidence favoring that placental bed NOX activity parallels UtA PI enhancement and suggests that an excess in oxidation underlies the development of pregnancy disorders coursing with enhanced UtA impedance
Neutrino dimuon production and the dynamical determination of strange parton distributions

AbstractUtilizing recent neutrino dimuon production measurement from NuTeV the assumptions on the determination of the strangeness content of the nucleon within the dynamical approach to parton distributions are investigated. The data are found to be in good agreement with the predictions derived from our (GJR08) dynamical parton distributions, which have been generated entirely radiatively starting from vanishing strange input distributions at an optimally chosen low resolution scale. Further, the data induce an asymmetry in the strange sea which is found to be small and positive in agreement with previous results