pinecone/core-2020-05-10-deduplication huggingface dataset:
Magnetic Phases in Sr(1-x) Ca(x)Co(2)P(2) Studied by μ+ SR

20th International Conference on Magnetism, ICM 2015In order to elucidate the dependence of the magnetic ground state on the Ca content (x) in Sr1-xCaxCo2P2 (0 ≤x ≤1, ThCr2Si2-type structure), we have performed muon spin rotation− and relaxation (μ+SR) experiments on Sr1-xCax Co2P2 powder samples mainly in a zero applied field. The end member compound, SrCo2P2, is found to be paramagnetic down to 19 mK. As x increases, such a paramagnetic ground state is observed down to 1.8 K until x = 0.45. Then, as x increases further, a short-range antiferromagnetic (AF) ordered phase appears at low temperatures for 0.48 ≤ x ≤ 0.75, and finally, a long-range AF ordered phase is stabilized for x > 0.75. The internal magnetic field of the other end member compound, CaCo2P2, is well consistent with that of the A-type AF order state, which was proposed from neutron scattering experiments. The phase diagram determined with μ+SR is different from that proposed by macroscopic measurements. For an isostructural compound, LaCo2P2, static magnetic order is found to be formed below <∼ 130 K
Delay in presentation to hospital for childhood cataract surgery in India

Purpose\ud
Cataract is one of the major causes of avoidable visual disability in children and the aim of this study was to investigate the age at which children with cataract present for surgery at tertiary hospitals across India.\ud
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Methods:\ud
A prospective multicenter study collected data from 9 eye hospitals in 8 states in India. All children admitted for cataract surgery between Nov 2015 and March 2016 were considered eligible. Parents were interviewed at the hospital by trained personnel and socio demographic information, age at diagnosis and at surgery and the relevant clinical data were obtained from the medical records. Mean age, age range at surgery were used and performed logistic regression analyses. \ud
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Results	\ud
Parents of 751 consecutive cases were interviewed, of which 469(63%) were boys and 548(73%) were from rural areas. Cataract was bilateral in 493 (66%) and unilateral in 258 (34%); of the unilateral cases, 179 (69%) were due to trauma. The mean age at surgery for ‘congenital’ and ‘developmental’ cataract was 48.2±50.9 and 99.7±46.42 months respectively and the mean age was lower in the southern region compared to other regions. Children with 2 or more siblings at home were five times more likely to undergo surgery within 12 months (OR, 4.69; 95% CI: 2.04 – 10.79; p = <0.001).\ud
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Conclusions\ud
Late surgery for childhood cataract remains a major challenge and the factors determining this issue in India are pertinent also to several other countries and need to be addressed for every child with cataract to achieve full visual potential
On the efficient evaluation of ruin probabilities for completely monotone claim size distributions

In this paper we propose a highly accurate approximation procedure for ruin probabilities in the classical collective risk model, which is based on a quadrature/rational approximation procedure proposed in [2]. For a certain class of claim size distributions (which contains the completely monotone distributions) we give a theoretical justification for the method. We also show that under weaker assumptions on the claim size distribution, the method may still perform reasonably well in some cases. This in particular provides an efficient alternative to a related method proposed in [3]. A number of numerical illustrations for the performance of this procedure is provided for both completely monotone and other types of random variables
Allegations of child sexual abuse in Family Court cases: a qualitative analysis of psychiatric evidence

Allegations of child sexual abuse in Family Court cases have gained increasing attention. The study investigates factors involved in Family Court cases involving allegations of child sexual abuse. A qualitative methodology was employed to examine Records of Judgement and Psychiatric Reports for 20 cases distilled from the data corpus of 102 cases. A seven-stage methodology was developed utilising a thematic analysis process informed by principles of grounded theory and phenomenology. The explication of eight thematic clusters was undertaken. The findings point to complex issues and dynamics in which child sexual abuse allegations have been raised. The alleging parent\u27s allegations of sexual abuse against their ex-partner may be: the expression of unconscious deep fears for their children\u27s welfare, or an action to meet their needs for personal affirmation in the context of the painful upheaval of a relationship break-up. Implications of the findings are discussed
Modelling the Global Solar Corona: Filament Chirality Observations and
  Surface Simulations

The hemispheric pattern of solar filaments is considered in the context of
the global magnetic field of the solar corona. In recent work Mackay and van
Ballegooijen have shown how, for a pair of interacting magnetic bipoles, the
observed chirality pattern could be explained by the dominant range of bipole
tilt angles and helicity in each hemisphere. This study aims to test this
earlier result through a direct comparison between theory and observations,
using newly-developed simulations of the actual surface and 3D coronal magnetic
fields over a 6-month period, on a global scale.
  In this paper we consider two key components of the study; firstly the
observations of filament chirality for the sample of 255 filaments, and
secondly our new simulations of the large-scale surface magnetic field. Based
on a flux-transport model, these will be used as the lower boundary condition
for the future 3D coronal simulations. Our technique differs significantly from
those of other authors, where the coronal field is either assumed to be purely
potential, or has to be reset back to potential every 27 days in order that the
photospheric field remain accurate. In our case we ensure accuracy by the
insertion of newly-emerging bipolar active regions, based on observed
photospheric synoptic magnetograms. The large-scale surface field is shown to
remain accurate over the 6-month period, without any resetting. This new
technique will enable future simulations to consider the long-term build-up and
transport of helicity and shear in the coronal magnetic field, over many months
or years.Comment: 26 pages, 11 figures, accepted for publication in Solar Physics
  (Springer
Study of the underlying event at forward rapidity in pp collisions at s√=0.9,2.76,and7TeV

The underlying event activity in proton-proton collisions at forward pseudo-rapidity (−6.6 < η < −5.2) is studied with the CMS detector at the LHC, using a novel observable: the ratio of the forward energy density, dE/dη, for events with a charged-particle jet produced at central pseudorapidity (|η jet| < 2) to the forward energy density for inclusive events. This forward energy density ratio is measured as a function of the central jet transverse momentum, p T, at three different pp centre-of-mass energies ( s√=0.9 , 2.76, and 7 TeV). In addition, the s√ evolution of the forward energy density is studied in inclusive events and in events with a central jet. The results are compared to those of Monte Carlo event generators for pp collisions and are discussed in terms of the underlying event. Whereas the dependence of the forward energy density ratio on jet p T at each s√ separately can be well reproduced by some models, all models fail to simultaneously describe the increase of the forward energy density with s√ in both inclusive events and in events with a central jet
Contrasting records of sea-level change in the eastern and western North Atlantic during the last 300 years.

We present a new 300-year sea-level reconstruction from a salt marsh on the Isle of Wight (central English Channel, UK) that we compare to other salt-marsh and long tide-gauge records to examine spatial and temporal variability in sea-level change in the North Atlantic. Our new reconstruction identifies an overall rise in relative sea level (RSL) of c. 0.30 m since the start of the eighteenth century at a rate of . Error-in-variables changepoint analysis indicates that there is no statistically significant deviation from a constant rate within the dataset. The reconstruction is broadly comparable to other tide-gauge and salt-marsh records from the European Atlantic, demonstrating coherence in sea level in this region over the last 150–300 years. In contrast, we identify significant differences in the rate and timing of RSL with records from the east coast of North America. The absence of a strong late 19th/early 20th century RSL acceleration contrasts with that recorded in salt marsh sediments along the eastern USA coastline, in particular in a well-dated and precise sea-level reconstruction from North Carolina. This suggests that this part of the North Carolina sea level record represents a regionally specific sea level acceleration. This is significant because the North Carolina record has been used as if it were globally representative within semi-empirical parameterisations of past and future sea-level change. We conclude that regional-scale differences of sea-level change highlight the value of using several, regionally representative RSL records when calibrating and testing semi-empirical models of sea level against palaeo-records. This is because by using records that potentially over-estimate sea-level rise in the past such models risk over-estimating sea-level rise in the future
Acyl-CoA synthetase 3 promotes lipid droplet biogenesis in ER microdomains.

Control of lipid droplet (LD) nucleation and copy number are critical, yet poorly understood, processes. We use model peptides that shift from the endoplasmic reticulum (ER) to LDs in response to fatty acids to characterize the initial steps of LD formation occurring in lipid-starved cells. Initially, arriving lipids are rapidly packed in LDs that are resistant to starvation (pre-LDs). Pre-LDs are restricted ER microdomains with a stable core of neutral lipids. Subsequently, a first round of"emerging" LDs is nucleated, providing additional lipid storage capacity. Finally, in proportion to lipid concentration, new rounds of LDs progressively assemble. Confocal microscopy and electron tomography suggest that emerging LDs are nucleated in a limited number of ER microdomains after a synchronized stepwise process of protein gathering, lipid packaging, and recognition by Plin3 and Plin2. A comparative analysis demonstrates that the acyl-CoA synthetase 3 is recruited early to the assembly sites, where it is required for efficient LD nucleation and lipid storage
Encapsulation and Dynamic Modularity in the Pi-Calculus

We describe a process calculus featuring high level constructs for
component-oriented programming in a distributed setting. We propose an
extension of the higher-order pi-calculus intended to capture several important
mechanisms related to component-based programming, such as dynamic update,
reconfiguration and code migration. In this paper, we are primarily concerned
with the possibility to build a distributed implementation of our calculus.
Accordingly, we define a low-level calculus, that describes how the high-level
constructs are implemented, as well as details of the data structures
manipulated at runtime. We also discuss current and future directions of
research in relation to our analysis of component-based programming
The charge and spin sectors of the t-t' Hubbard model

The charge and spin sectors, which are intimately coupled to the fermionic
one, of the t-t' Hubbard model have been computed self-consistently within the
two-pole approximation. The relevant unknown correlators appearing in the
causal bosonic propagators have been computed by enforcing the constraints
dictated by the hydrodynamics and the algebra of the composite operators coming
into play. The proposed scheme of approximation extends previous calculations
made for the fermionic sector of the t-t' Hubbard model and the bosonic sector
of the Hubbard model, which showed to be very effective to describe the
overdoped region of cuprates (the former) and the magnetic response of their
parent compounds (the latter).Comment: 3 page
Pt-imbalance in dimuon+jet production as a signal of partonic energy
  loss in heavy ion collisions at LHC

We consider a hard jet production tagged by a muon pair in ultrarelativistic
heavy ion collisions. The process cross section is calculated by the CompHEP
Monte-Carlo generator taking into account full gamma*/Z interference pattern at
LHC energies. We have found that reasonable statistics, ~1000 events per 1
month of LHC run with lead beams, can be expected for realistic geometrical
acceptance and kinematic cuts. The transverse momentum imbalance due to
interactions of jet partons in the medium is evaluated for mu+mu-pair+jet
correlation, as well as for the correlation between mu+mu- pair and a leading
particle in a jet. Theoretical and experimental uncertainties of these
observables are discussed.Comment: 17 pages in LaTeX including 5 eps-figure
X(1576) as Diquark-Antidiquark Bound State

We propose that the broad $1^{--}$ resonance structure recently discovered by
BES in $J/\psi\to K^{+}K^{-}\pi^{0}$ is the P-wave excitation of a
diquark-antidiquark bound state. This interpretation implies that there exists
a negative parity, vector nonet. A rough estimate of the mass spectrum of the
nonet is presented, and the prediction for the mass of X(1576) is consistent
with the experimental data. The OZI allowed strong decays are studied, it can
decay into two pseudoscalars or one pseudoscalar plus one vector meson. A
crucial prediction is that X(1576) should dominantly decay into $K^{+}K^{-}$,
$K_{L}K_{S}$, $\phi\pi^{0}$. Since the isospin of X(1576) is $\mathbf{1}$, the
observation of $I_3=1$ or $I_3=-1$ states which predominantly decays into
strange mesons could provide another important test to our proposal. To search
the charged $I_3=1$ isospin partner associated with X(1576) in $J/\psi\to
\eta\pi^{+}\pi^{-}$, $J/\psi\to K^{+}K_{L}\pi^{-}$, $J/\psi\to
K^{+}K_{S}\pi^{-}$, $J/\psi\to \phi\pi^{+}\pi^{-}$ is suggested.Comment: 15 pages, 1 figur
"Semi-Realistic" F-term Inflation Model Building in Supergravity

We describe methods for building "semi-realistic" models of F-term inflation.
By semi-realistic we mean that they are built in, and obey the requirements of,
"semi-realistic" particle physics models. The particle physics models are taken
to be effective supergravity theories derived from orbifold compactifications
of string theory, and their requirements are taken to be modular invariance,
absence of mass terms and stabilization of moduli. We review the particle
physics models, their requirements and tools and methods for building inflation
models.Comment: 28 pages, 2 figure
Coherent monochromatic phonons in highly-purified semiconducting
  single-wall carbon nanotubes

We have used a femtosecond pump-probe impulsive Raman technique to explore
the polarization dependence of coherent optical phonons in highly-purified and
aligned semiconducting single-wall carbon nanotubes (SWCNTs). Coherent phonon
spectra for the radial breathing modes (RBMs) exhibit a different monochromatic
frequency between the film and solution samples, indicating the presence of
differing exciton excitation processes. By varying the polarization of the
incident pump beam on the aligned SWCNT film, we found that the anisotropy of
the coherent RBM excitation depends on the laser wavelength, which we consider
to be associated with the resonant and off-resonant behavior of RBM excitation.Comment: 4 pages, 4 figures, accepted for publication in Appl. Phys. Let
Differential asteroseismic study of seismic twins observed by CoRoT;
  Comparison of HD 175272 with HD 181420

The CoRoT short asteroseismic runs give us the opportunity to observe a large
variety of late-type stars through their solar-like oscillations. We report the
observation and modeling of the F5V star HD 175272. Our aim is to define a
method for extracting as much information as possible from a noisy oscillation
spectrum. We followed a differential approach that consists of using a
well-known star as a reference to characterize another star. We used classical
tools such as the envelope autocorrelation function to derive the global
seismic parameters of the star. We compared HD 175272 with HD 181420 through a
linear approach, because they appear to be asteroseismic twins. The comparison
with the reference star enables us to substantially enhance the scientific
output for HD 175272. First, we determined its global characteristics through a
detailed seismic analysis of HD 181420. Second, with our differential approach,
we measured the difference of mass, radius and age between HD 175272 and HD
181420. We have developed a general method able to derive asteroseismic
constraints on a star even in case of low-quality data. %This method is based
on the comparison to a star with common seismic and classical properties.
Seismic data allow accurate measurements of radii and masses differences
between the two stars. This method can be applied to stars with interesting
properties but low signal-to-noise ratio oscillation spectrum, such as stars
hosting an exoplanet or members of a binary system.Comment: Accepted in A&
Degree-Scale CMB Polarization Measurements from Three Years of BICEP1
  Data

BICEP1 is a millimeter-wavelength telescope designed specifically to measure
the inflationary B-mode polarization of the Cosmic Microwave Background (CMB)
at degree angular scales. We present results from an analysis of the data
acquired during three seasons of observations at the South Pole (2006 to 2008).
This work extends the two-year result published in Chiang et al. (2010), with
additional data from the third season and relaxed detector-selection criteria.
This analysis also introduces a more comprehensive estimation of band-power
window functions, improved likelihood estimation methods and a new technique
for deprojecting monopole temperature-to-polarization leakage which reduces
this class of systematic uncertainty to a negligible level. We present maps of
temperature, E- and B-mode polarization, and their associated angular power
spectra. The improvement in the map noise level and polarization spectra error
bars are consistent with the 52% increase in integration time relative to
Chiang et al. (2010). We confirm both self-consistency of the polarization data
and consistency with the two-year results. We measure the angular power spectra
at 21 <= l <= 335 and find that the EE spectrum is consistent with Lambda Cold
Dark Matter (LCDM) cosmology, with the first acoustic peak of the EE spectrum
now detected at 15sigma. The BB spectrum remains consistent with zero. From
B-modes only, we constrain the tensor-to-scalar ratio to r = 0.03+0.27-0.23, or
r < 0.70 at 95% confidence level.Comment: 19 pages, 13 figures. Data release for this publication:
  http://bicep.rc.fas.harvard.edu/bicep1_3yr
On the LHCb anomaly in B -> K* l+ l-

The latest LHCb angular analysis of the rare decay B -> K* mu+ mu- shows some
discrepancies from the SM up to the 3.7 sigma level. There is a consistent new
physics explanation of these anomalies, while it is also reasonable that these
anomalies are just statistical fluctuations and/or a direct consequence of
underestimated hadronic uncertainties. We briefly discuss possible cross-checks
of the various hypotheses with an analysis of the inclusive B -> Xs l+ l- based
on the data collected by the B factories Babar and Belle and also based on
future opportunities at SuperBelle. We also present a global analysis of the
latest LHCb data under the hypothesis of Minimal Flavour Violation. The latter
is an important benchmark scenario for new physics models. Any measurements
beyond the MFV bounds and relations unambiguously indicate the existence of new
flavour structures next to the Yukawa couplings of the Standard Model. However,
if new physics is responsible for these discrepancies, we show it is compatible
with the MFV hypothesis, so no new flavour structures are needed. Moreover, we
analyse the impact of the correlations between the observables based on a Monte
Carlo study.Comment: 23 pages, 9 figure
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
with broken translation invariance, either in 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 has a power-law behaviour, with the exponent
determined by the ground state. We also obtain an expression for the the DC
conductivity at finite temperature in terms of horizon data of the black hole
solutions.Comment: 30 pages, 4 figures. Very minor changes - version published in JHE
The four-loop remainder function and multi-Regge behavior at NNLLA in
  planar N=4 super-Yang-Mills theory

We present the four-loop remainder function for six-gluon scattering with
maximal helicity violation in planar N=4 super-Yang-Mills theory, as an
analytic function of three dual-conformal cross ratios. The function is
constructed entirely from its analytic properties, without ever inspecting any
multi-loop integrand. We employ the same approach used at three loops, writing
an ansatz in terms of hexagon functions, and fixing coefficients in the ansatz
using the multi-Regge limit and the operator product expansion in the
near-collinear limit. We express the result in terms of multiple
polylogarithms, and in terms of the coproduct for the associated Hopf algebra.
From the remainder function, we extract the BFKL eigenvalue at
next-to-next-to-leading logarithmic accuracy (NNLLA), and the impact factor at
NNNLLA. We plot the remainder function along various lines and on one surface,
studying ratios of successive loop orders. As seen previously through three
loops, these ratios are surprisingly constant over large regions in the space
of cross ratios, and they are not far from the value expected at asymptotically
large orders of perturbation theory.Comment: 63 pages, 5 figures. v2: clarifications added and typos fixe
Doppler-beaming in the Kepler light curve of LHS 6343 A

Context. Kepler observations revealed a brown dwarf eclipsing the M-type star
LHS 6343 A with a period of 12.71 days. In addition, an out-of-eclipse light
modulation with the same period and a relative semi-amplitude of 2 x 10^-4 was
observed showing an almost constant phase lag to the eclipses produced by the
brown dwarf. In a previous work, we concluded that this was due to the light
modulation induced by photospheric active regions in LHS 6343 A. Aims. In the
present work, we prove that most of the out-of-eclipse light modulation is
caused by the Doppler-beaming induced by the orbital motion of the primary
star. Methods. We introduce a model of the Doppler-beaming for an eccentric
orbit and also considered the ellipsoidal effect. The data were fitted using a
Bayesian approach implemented through a Monte Carlo Markov chain method. Model
residuals were analysed by searching for periodicities using a Lomb-Scargle
periodogram. Results. For the first seven quarters of Kepler observations and
the orbit previously derived from the radial velocity measurements, we show
that the light modulation of the system outside eclipses is dominated by the
Doppler-beaming effect. A period search performed on the residuals shows a
significant periodicity of 42.5 +- 3.2 days with a false-alarm probability of 5
x 10^-4, probably associated with the rotational modulation of the primary
component.Comment: 6 pages, 7 figure