pinecone/core-2020-05-10-deduplication huggingface dataset:
Identifying aggregate supply and demand shocks in small open economies: empirical evidence from African countries

This article was published in the journal, International Review of Economics and Finance [© Elsevier]. The definitive version is available at: http://dx.doi.org/10.1016/j.iref.2011.08.004This paper uses a tri-variate structural VAR with a long-run identification scheme, akin to the Blanchard and Quah method, to identify external and domestic supply and demand shocks in 22 African countries between 1980 and 2005. Domestic supply shocks are found to be the most important factor contributing over 70% to output fluctuations in these countries, with external shocks playing a relatively minor role. A partial correlation analysis between the identified shocks and a measure of the fiscal policies of the countries revealed that the fiscal policies pursued by most of the countries during the period are counter-cyclical
First records and potential palaeoecological significance of Dianella (Xanthorrhoeaceae), an extinct representative of the native flora of Rapa Nui (Easter Island).

Easter Island, a remote island in the Pacific Ocean, is currently primarily covered by grasslands, but palaeoecological studies have shown the former presence of different vegetation. Much of its original biota has been removed during the last two millennia, most likely by human activities, and little is known about the native flora.Macrofossil and pollen analyses of a sediment core from the Raraku crater lake have revealed the occurrence of a plant that is currently extinct from the island: Dianella cf. intermedia/adenanthera (Xanthorrhoeaceae), which grew and disappeared at the Raraku site long before human arrival. The occurrence of Dianella within the Raraku sedimentary sequence (between 9.4 and 5.4 cal. kyr B.P.) could have been linked to the existence of favorable palaeoenvironmental conditions (peatland rather than the present-day lacustrine environment) during the early to mid Holocene. This finding contributes new knowledge about indigenous plant diversity on Easter Island and reinforces the usefulness of further macrofossil and pollen analyses to identify native species on Easter Island and elsewhere
Enhancing social ability by stimulating right temporoparietal junction.

The temporoparietal junction (TPJ) is a key node within the "social brain". Several studies suggest that the TPJ controls representations of the self or another individual across a variety of low-level (agency discrimination, visual perspective taking, control of imitation) and high-level (mentalizing, empathy) sociocognitive processes. We explored whether sociocognitive abilities relying on on-line control of self and other representations could be modulated with transcranial direct current stimulation (tDCS) of TPJ. Participants received excitatory (anodal), inhibitory (cathodal), or sham stimulation before completing three sociocognitive tasks. Anodal stimulation improved the on-line control of self-other representations elicited by the imitation and perspective-taking tasks while not affecting attribution of mental states during a self-referential task devoid of such a requirement. Our findings demonstrate the efficacy of tDCS to improve social cognition and highlight the potential for tDCS to be used as a tool to aid self-other processing in clinical populations
Revisiting the Westerlund 2 Field with the H.E.S.S. Telescope Array

Aims. Previous observations with the H.E.S.S. telescope array revealed the
existence of extended very-high-energy (VHE; E>100 GeV) {\gamma}-ray emission,
HESS J1023-575, coincident with the young stellar cluster Westerlund 2. At the
time of discovery, the origin of the observed emission was not unambiguously
identified, and follow-up observations have been performed to further
investigate the nature of this {\gamma}-ray source. Methods. The Carina region
towards the open cluster Westerlund 2 has been re-observed, increasing the
total exposure to 45.9 h. The combined dataset includes 33 h of new data and
now permits a search for energy-dependent morphology and detailed spectroscopy.
Results. A new, hard spectrum VHE {\gamma}-ray source, HESSJ1026-582, was
discovered with a statistical significance of 7{\sigma}. It is positionally
coincident with the Fermi LAT pulsar PSR J1028-5819. The positional coincidence
and radio/{\gamma}-ray characteristics of the LAT pulsar favors a scenario
where the TeV emission originates from a pulsar wind nebula. The nature of HESS
J1023-575 is discussed in light of the deep H.E.S.S. observations and recent
multi-wavelength discoveries, including the Fermi LAT pulsar PSRJ1022-5746 and
giant molecular clouds in the region. Despite the improved VHE dataset, a clear
identification of the object responsible for the VHE emission from HESS
J1023-575 is not yet possible, and contribution from the nearby high-energy
pulsar and/or the open cluster remains a possibility.Comment: Accepted for publication on A&
Magneto-exciton in single and coupled type II quantum dots

We studied the exciton energy in a type II quantum disk as a function of the
magnetic field, disk radius R and height d. We found angular momentum
transitions for dots with d >> 2R. Application of an electric field
perpendicular to the disk showed a non-linear Stark shift. In the case of three
vertically coupled dots angular momentum transistions were found for small
interdot distances which disappeared with increasing interdot distance.Comment: 3 pages, 5 figures, proceedings of OECS 7 (Optics and Excitons in
  Confined Systems, Montpellier (France), 3-7 september 2001
Search for t->ch at e+e- Linear Colliders

We study the rare top-quark decay t->ch, where h is a generic Higgs boson, at
a linear collider. If kinematically accessible, all models contain this decay
at some level due to quark flavor mixing. Some models, such as Model III of the
two-Higgs doublet model, have a tree-level top-charm-Higgs coupling, and the
branching ratio is close to 0.5%. Others, such as the MSSM, have a coupling
induced at one-loop, and can have a branching ratio in the range of 10^{-5} -
5x10^{-4}. We find that a linear collider of root(s) = 500 GeV and a luminosity
of 500 fb^{-1} will begin to be sensitive to this range of the coupling.Comment: 12 pages, 5 figures, 2 table
Measurement of the high-mass Drell--Yan differential cross-section in pp
  collisions at sqrt(s)=7 TeV with the ATLAS detector

This Letter reports a measurement of the high-mass Drell-Yan differential
cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV
at the LHC. Based on an integrated luminosity of 4.9 /fb, the differential
cross-section in the Z/gamma* to e+e- channel is measured with the ATLAS
detector as a function of the invariant mass, Mee, in the range 116 < Mee <
1500 GeV, for a fiducial region in which both the electron and the positron
have transverse momentum pT > 25 GeV and pseudorapidity eta < 2.5. A comparison
is made to various event generators and to the predictions of perturbative QCD
calculations at next-to-next-to-leading order.Comment: 8 pages plus author list (21 pages total), 3 figures, 2 tables,
  submitted to PLB, All figures including auxiliary figures are available at
  http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2012-10
Quantum Kerr tunneling vacua on a $(D{\bar D})_4$-brane: An emergent
  Kerr black hole in five dimensions

We revisit a non-perturbative space-time curvature theory, underlying a two
form U(1) gauge dynamics, on a D4-brane. In particular, two different gauge
choices for a two form are explored underlying the dynamics of a geometric
torsion in a second order formalism. We obtain two non-extremal quantum Kerr
geometries in five dimensions on a pair of $(D{\bar D})_4$-brane in a type IIA
superstring theory. The quantum vacua are described by a vanishing torsion in a
gauge choice, underlying a geometric realization, on a non-BPS brane. It is
argued that the quantum Kerr vacua undergo tunneling and lead to a five
dimensional Kerr black hole in Einstein vacuum. A low energy limit in the
quantum Kerr vacua further re-assures an emergent Kerr black hole.Comment: 21 pages, 8 figure
Nucleon Electric Dipole Moments and the Isovector Parity- and
  Time-Reversal-Odd Pion-Nucleon Coupling

The isovector time-reversal- and parity-violating pion-nucleon coupling
$\bar{g}_{\pi}^{(1)}$ is uniquely sensitive to dimension six interactions
between right-handed light quarks and the Standard Model Higgs doublet that
naturally arises in left-right symmetric models. Recent work has used the
$\bar{g}_{\pi}^{(1)}$-induced one-loop contribution to the neutron electric
dipole moment $d_n$, together with the present experimental $d_n$ bound, to
constrain the CP-violating parameters of the left-right symmetric model. We
show that this and related analyses are based on an earlier meson theory $d_n$
computation that is not consistent with the power-counting appropriate for an
effective field theory. We repeat the one-loop calculation using heavy baryon
chiral perturbation theory and find that the resulting $d_n$ sensitivity to
$\bar{g}_{\pi}^{(1)}$ is suppressed, implying more relaxed constraints on the
parameter space of the left-right symmetric model. Assuming no cancellations
between this loop contribution and other contributions, such as the leading
order EDM low-energy constant, the present limit on $d_n$ implies
$|\bar{g}_{\pi}^{(1)}| \lesssim 1.1\times 10^{-10}$.Comment: 10 pages, 4 figure
First results from the CALYPSO IRAM-PdBI survey - III. Monopolar jets
  driven by a proto-binary system in NGC1333-IRAS2A

Context: The earliest evolutionary stages of low-mass protostars are
characterised by hot and fast jets which remove angular momentum from the
circumstellar disk, thus allowing mass accretion onto the central object.
However, the launch mechanism is still being debated. Aims: We would like to
exploit high-angular (~ 0.8") resolution and high-sensitivity images to
investigate the origin of protostellar jets using typical molecular tracers of
shocked regions, such as SiO and SO. Methods: We mapped the inner 22" of the
NGC1333-IRAS2A protostar in SiO(5-4), SO(65-54), and the continuum emission at
1.4 mm using the IRAM Plateau de Bure interferometer in the framework of the
CALYPSO IRAM large program. Results: For the first time, we disentangle the
NGC1333-IRAS2A Class 0 object into a proto-binary system revealing two
protostars (MM1, MM2) separated by ~ 560 AU, each of them driving their own
jet, while past work considered a single protostar with a quadrupolar outflow.
We reveal (i) a clumpy, fast (up to |V-VLSR| > 50 km/s), and blueshifted jet
emerging from the brightest MM1 source, and (ii) a slower redshifted jet,
driven by MM2. Silicon monoxide emission is a powerful tracer of
high-excitation (Tkin > 100 K; n(H2) > 10^5 cm-3) jets close to the launching
region. At the highest velocities, SO appears to mimic SiO tracing the jets,
whereas at velocities close to the systemic one, SO is dominated by extended
emission, tracing the cavity opened by the jet. Conclusions: Both jets are
intrinsically monopolar, and intermittent in time. The dynamical time of the
SiO clumps is < 30-90 yr, indicating that one-sided ejections from protostars
can take place on these timescales.Comment: Astronomy & Astrophysics Letter, in pres
Discussing the physical meaning of the absorption feature at 2.1 keV in
  4U 1538-52

High resolution X-ray spectroscopy is a powerful tool for studying the nature
of the matter surrounding the neutron star in X-ray binaries and its
interaction between the stellar wind and the compact object. In particular,
absorption features in their spectra could reveal the presence of atmospheres
of the neutron star or their magnetic field strength. Here we present an
investigation of the absorption feature at 2.1 keV in the X-ray spectrum of the
high mass X-ray binary 4U 1538-52 based on our previous analysis of the
XMM-Newton data. We study various possible origins and discuss the different
physical scenarios in order to explain this feature. A likely interpretation is
that the feature is associated with atomic transitions in an O/Ne neutron star
atmosphere or of hydrogen and helium like Fe or Si ions formed in the stellar
wind of the donor.Comment: 8 pages, 6 figures (three of them multi-panel figures), accepted for
  publication in Astronomische Nachrichten/Astronomical Note
Kibble-Zurek Scaling in Holographic Quantum Quench : Backreaction

We study gauge and gravity backreaction in a holographic model of quantum
quench across a superfluid critical transition. The model involves a complex
scalar field coupled to a gauge and gravity field in the bulk. In earlier work
(arXiv:1211.1776) the scalar field had a strong self-coupling, in which case
the backreaction on both the metric and the gauge field can be ignored. In this
approximation, it was shown that when a time dependent source for the order
parameter drives the system across the critical point at a rate slow compared
to the initial gap, the dynamics in the critical region is dominated by a zero
mode of the bulk scalar, leading to a Kibble-Zurek type scaling function. We
show that this mechanism for emergence of scaling behavior continues to hold
without any self-coupling in the presence of backreaction of gauge field and
gravity. Even though there are no zero modes for the metric and the gauge
field, the scalar dynamics induces adiabaticity breakdown leading to scaling.
This yields scaling behavior for the time dependence of the charge density and
energy momentum tensor.Comment: 25 pages; v2 minor corrections; v3 minor corrections, to appear in
  JHE
Gauging by St\"uckelberg field-shifting symmetry

We embed second class constrained systems by a formalism that combines
concepts of the BFFT method and the unfixing gauge formalism. As a result, we
obtain a gauge-invariant system where the introduction of the Wess-Zumino (WZ)
field is essential. The initial phase-space variables are gauging with the
introduction of the WZ field, a procedure that resembles the St\"uckelberg
field- shifting formalism. In some cases, it is possible to eliminate the WZ
field and, therefore, obtain an invariant system written only as a function of
the original phase-space variables. We apply this formalism to important
physical models: the reduced-SU(2) Skyrme model and the two dimensional chiral
bosons field theory. In these systems, the gauge-invariant Hamiltonians are
derived in a very simple way when compared with other usual formalisms.Comment: revised version. To appear in Phys. Lett.
An Analysis of $B_{s}$ Decays in the Left-Right-Symmetric Model with Spontaneous CP Violation

Non-leptonic B_s decays into CP eigenstates that are caused by \bar b -> \bar cc\bar s quark-level transitions, such as B_s -> D_s^+D^-_s, J/psi eta^(') or J/psi phi, provide a powerful tool to search for ``new physics'', as the CP-violating effects in these modes are tiny in the Standard Model. We explore these effects for a particular scenario of new physics, the left-right-symmetric model with spontaneous CP violation. In our analysis, we take into account all presently available experimental constraints on the parameters of this model, i.e. those implied by K- and B-decay observables; we find that CP asymmetries as large as O(40%) may arise in the B_s channels, whereas the left-right-symmetric model favours a small CP asymmetry in the ``gold-plated'' mode B_d -> J/psi K_S. Such a pattern would be in favour of B-physics experiments at hadron machines, where the B_s modes are very accessible
Magnetic Properties of Scalar Particles --The Scalar Aharonov-Casher Effect and Supersymmetry

The original topological Aharonov-Casher (AC) effect is due to the interaction of the anomalous magnetic dipole moment (MDM) with certain configurations of electric field. Naively one would not expect an AC effect for a scalar particle for which no anomalous MDM can be defined in the usual sense. In this letter we study the AC effect in supersymmetric systems. In this framework there is the possibility to deducing the AC effect of a scalar particle from the corresponding effect for a spinor particle. In 3+1 dimensions such a connection is not possible because the anomalous MDM is zero if supersymmetry is an exact symmetry. However, in 2+1 dimensions it is possible to have an anomalous MDM even with exact supersymmetry. We then compute the anomalous MDM at the one loop level, showing how the scalar form arises in 2+1 dimensions from the coupling of the scalar to spinors. The AC effect corresponding to a scalar can be uniquely identified. This model shows us how an AC effect for a scalar can be generated for non-supersymmetric theories
Supersymmetry algebras and Lorentz invariance for d=10 Super Yang-Mills

We consider ways in which conventional supersymmetry can be embedded in the
set of more general fermionic transformations proposed recently [\Ref{B}] as a
framework in which to study $d=10$ super Yang-Mills. Solutions are exhibited
which involve closed algebras of various numbers of supersymmetries together
with their invariance groups: nine supersymmetries with $\GT {\times}\SO (1,1)$
invariance; eight supersymmetries with $\SO (7){\times}\SO (1,1)$ invariance;
four supersymmetries with $\SO (3,1){\times}\U (3)$ invariance. We recover in
this manner all previously known ways of adding finite numbers of bosonic
auxiliary fields so as to partially close the $d=10$ superalgebra. A crucial
feature of these solutions is that the auxiliary fields transform non-trivially
under the residual Lorentz symmetry, even though they are originally introduced
as Lorentz scalars.Comment: 11 pages, plain tex (macros included), CERN-TH.7231/9
Semi-classical limit of Schrodinger-Poisson equations in space dimension
  at least 3

We prove the existence of solutions to the Schrodinger-Poisson system on a
time interval independent of the Planck constant, when the doping profile does
not necessarily decrease at infinity, in the presence of a subquadratic
external potential. The lack of integrability of the doping profile is resolved
by working in Zhidkov spaces, in space dimension at least three. We infer that
the main quadratic quantities (position density and modified momentum density)
converge strongly as the Planck constant goes to zero. When the doping profile
is integrable, we prove pointwise convergence.Comment: 30 pages. To appear in JD
Improving design for recycling - application to composites

The use of composite material increases. End of life regulations, material consumption reductions or restrictions, ask engineers about their potential use. Innovative recycling solutions arise that recover efficiently carbon fibres. This paper explores the design for composites recycling issue. Recycler becomes a new knowledge expert for the designer. It is necessary to analyze their information shares and exchanges. The recycler is an end of life facilitator. He is also the second life material user and can ask for material evolutions. The collaboration must be improved using knowledge performance indicators. These discussions will be enlightened by examples from carbon recycling experiments.EcoSD NetworkEcoSD networ
How to match the optimal currently available inhaler device to an individual child with asthma or recurrent wheeze

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/Peer reviewedPublisher PD
Soft gluon resummation in the signal-background interference process of
  $gg(\to h^*) \to ZZ$

We present a precise theoretical prediction for the signal-background
interference process of $gg(\to h^*) \to ZZ$, which is useful to constrain the
Higgs boson decay width and to measure Higgs couplings to the SM particles. The
approximate NNLO $K$-factor is in the range of $2.05-2.45$ ($1.85-2.25$),
depending on $M_{ZZ}$, at the 8 (13) TeV LHC. And the soft gluon resummation
can increase the approximate NNLO result by about $10\%$ at both the 8 TeV and
13 TeV LHC. The theoretical uncertainties including the scale, uncalculated
multi-loop amplitudes of the background and PDF$+\alpha_s$ are roughly
$\mathcal{O}(10\%)$ at ${\rm NNLL'}$. We also confirm that the approximate
$K$-factors in the interference and the pure signal processes are the same.Comment: 18 pages, 9 figures; v2 published in JHE
General $f(R)$ and conformal inflation from minimal supergravity plus
  matter

We embed general $f(R)$ inflationary models in minimal supergravity plus
matter, a single chiral superfield $\Phi$, with or without another superfield
$S$, via a Jordan frame Einstein+scalar description. In particular,
inflationary models like a generalized Starobinsky one are analyzed and
constraints on them are found. We also embed the related models of conformal
inflation, also described as Jordan frame Einstein+scalar models, in particular
the conformal inflation from the Higgs model, and analyze the inflationary
constraints on them.Comment: 16 pages, no figures; typos corrected, references adde
Beliefs and actions in the trust game : creating instrumental variables to estimate the causal effect

We are grateful for financial support from the U.K. Economic and Social Research Council (ESRC-RES-1973), the European Research Council (ERC-263412) and the ELSE centre at UCL.In many economic contexts, an elusive variable of interest is the agent's belief about relevant events, e.g. about other agents' behavior. A growing number of surveys and experiments ask participants to state beliefs explicitly but little is known about the causal relation between beliefs and actions. This paper discusses the possibility of creating exogenous instrumental variables for belief statements, by informing the agent about exogenous manipulations of the relevant events. We conduct trust game experiments where the amount sent back by the second player (trustee) is exogenously varied. The procedure allows detecting causal links from beliefs to actions under plausible assumptions. The IV-estimated effect is significant, confirming the causal role of beliefs.Publisher PDFPeer reviewe
Satellite content and quenching of star formation in galaxy groups at z ~ 1.8

We study the properties of satellites in the environment of massive star-forming galaxies at z ~ 1.8 in the COSMOS field, using a sample of 215 galaxies on the main sequence of star formation with an average mass of ~1011M⊙. At z> 1.5, these galaxies typically trace halos of mass ≳1013M⊙. We use optical-near-infrared photometry to estimate stellar masses and star formation rates (SFR) of centrals and satellites down to ~ 6 × 109M⊙. We stack data around 215 central galaxies to statistically detect their satellite halos, finding an average of ~3 galaxies in excess of the background density. We fit the radial profiles of satellites with simple β-models, and compare their integrated properties to model predictions. We find that the total stellar mass of satellites amounts to ~68% of the central galaxy, while spectral energy distribution modeling and far-infrared photometry consistently show their total SFR to be 25-35% of the central's rate. We also see significant variation in the specific SFR of satellites within the halo with, in particular, a sharp decrease at <100 kpc. After considering different potential explanations, we conclude that this is likely an environmental signature of the hot inner halo. This effect can be explained in the first order by a simple free-fall scenario, suggesting that these low-mass environments can shut down star formation in satellites on relatively short timescales of ~0.3 Gyr