pinecone/core-2020-05-10-deduplication huggingface dataset:
Monte Carlo simulation of localization dynamics of excitons in ZnO and CdZnO quantum well structures

Cataloged from PDF version of article.Localization dynamics of excitons was studied for ZnO/MgZnO and CdZnO/MgZnO quantum wells (QWs). The experimental photoluminescence (PL) and absorption data were compared with the results of Monte Carlo simulation in which the excitonic hopping was modeled. The temperature-dependent PL linewidth and Stokes shift were found to be in a reasonable agreement with the hopping model, with accounting for an additional inhomogeneous broadening. The density of localized states used in the simulation for the CdZnO QW was consistent with the absorption spectrum. (c) 2006 American Institute of Physics
Acute COPD exacerbation: 3 T MRI evaluation of pulmonary regional perfusion--preliminary experience.

OBJECTIVES:\ud
\ud
To compare pulmonary perfusion parameters by means of dynamic perfusion magnetic resonance in patients affected by chronic obstructive pulmonary disease (COPD), during and after acute exacerbation.\ud
METHODS:\ud
\ud
Fifteen patients were successfully evaluated with perfusional MRI during an acute exacerbation of COPD and upon clinical stabilization. Inclusion criteria were a PaCO2 > 45 mmHg and respiratory acidosis (arterial blood pH < 7.35) at admittance.\ud
RESULTS:\ud
\ud
In the acute phase a reduction of pulmonary blood flow (PBF) and pulmonary blood volume (PBV), and a significant prolonging of the mean transit time (MTT) and time to peak (TTP) were observed in all patients. In the stabilization phase a significant increase of PBF and PBV and a significant reduction of MTT and TTP were observed in 6 patients; no significant variations were observed in the other 9 patients.\ud
CONCLUSION:\ud
\ud
3D time-resolved contrast-enhanced MRI allows quantitative evaluation of pulmonary regional perfusion in patients affected by COPD, identifying patients in which perfusion defects are resolved in the clinical-stabilization phase. This technique might allow the identification of patients in whom vasospasm may be the main responsible of pulmonary hypoperfusion during acute COPD exacerbation, with potential advantages on the clinical management of these patients
A simple non-chaotic map generating subdiffusive, diffusive, and superdiffusive dynamics

Analytically tractable dynamical systems exhibiting a whole range of normal and anomalous deterministic diffusion are rare. Here, we introduce a simple non-chaotic model in terms of an interval exchange transformation suitably lifted onto the whole real line which preserves distances except at a countable set of points. This property, which leads to vanishing Lyapunov exponents, is designed to mimic diffusion in non-chaotic polygonal billiards that give rise to normal and anomalous diffusion in a fully deterministic setting. As these billiards are typically too complicated to be analyzed from first principles, simplified models are needed to identify the minimal ingredients generating the different transport regimes. For our model, which we call the slicer map, we calculate all its moments in position analytically under variation of a single control parameter. We show that the slicer map exhibits a transition from subdiffusion over normal diffusion to superdiffusion under parameter variation. Our results may help to understand the delicate parameter dependence of the type of diffusion generated by polygonal billiards. We argue that in different parameter regions the transport properties of our simple model match to different classes of known stochastic processes. This may shed light on difficulties to match diffusion in polygonal billiards to a single anomalous stochastic process
Measurement of the top quark pair cross section with ATLAS in pp collisions at s=7 TeV using final states with an electron or a muon and a hadronically decaying τ lepton

Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAMA measurement of the cross section of top quark pair production in proton–proton collisions recorded with the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy of 7 TeV is reported. The data sample used corresponds to an integrated luminosity of 2.05 fb−1. Events with an isolated electron or muon and a τ lepton decaying hadronically are used. In addition, a large missing transverse momentum and two or more energetic jets are required. At least one of the jets must be identified as originating from a b quark. The measured cross section, σtt = 186±13 (stat.)±20 (syst.)±7 (lumi.) pb, is in good agreement with the Standard Model predictionWe acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF, DNSRC and Lundbeck Foundation, Denmark; EPLANET and ERC, European Union; IN2P3-CNRS, CEA-DSM/IRFU, France; GNAS, Georgia; BMBF, DFG, HGF, MPG and AvH Foundation, Germany; GSRT, Greece; ISF, MINERVA, GIF, DIP and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Netherlands; RCN, Norway; MNiSW, Poland; GRICES and FCT, Portugal; MERYS (MECTS), Romania; MES of Russia and ROSATOM, Russian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; ARRS and MVZT, Slovenia; DST/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SER, SNSF and Cantons of Bern and Geneva, Switzerland; NSC, Taiwan; TAEK, Turkey; STFC, the Royal Society and Leverhulme Trust, United Kingdom; DOE and NSF, United States of America. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN and the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NLT1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA) and in the Tier-2 facilities worldwid
A search for high-mass resonances decaying to τ+τ- in pp collisions at √s=7 TeV with the ATLAS detector

Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAMThis Letter presents a search for high-mass resonances decaying into τ+τ− final states using proton– proton collisions at √ s = 7 TeV produced by the Large Hadron Collider. The data were recorded with the ATLAS detector and correspond to an integrated luminosity of 4.6 fb−1. No statistically significant excess above the Standard Model expectation is observed; 95% credibility upper limits are set on the cross section times branching fraction of Z' resonances decaying into τ+τ− pairs as a function of the resonance mass. As a result, Z' bosons of the Sequential Standard Model with masses less than 1.40 TeV are excluded at 95% credibilityWe acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWF and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF, DNSRC and Lundbeck Foundation, Denmark; EPLANET and ERC, European Union; IN2P3-CNRS, CEA-DSM/IRFU, France; GNSF, Georgia; BMBF, DFG, HGF, MPG and AvH Foundation, Germany; GSRT, Greece; ISF, MINERVA, GIF, DIP and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Netherlands; BRF and RCN, Norway; MNiSW, Poland; GRICES and FCT, Portugal; MERYS (MECTS), Romania; MES of Russia and ROSATOM, Russian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; ARRS and MVZT, Slovenia; DST/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SER, SNSF and Cantons of Bern and Geneva, Switzerland; NSC, Taiwan; TAEK, Turkey; STFC, the Royal Society and Leverhulme Trust, United Kingdom; DOE and NSF, United States of America. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN and the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA) and in the Tier-2 facilities worldwid
Search for a standard model Higgs boson in the H→ZZ→ℓ+ℓ-νν- decay channel using 4.7fb-1 of s=7TeV data with the ATLAS detector

Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAMA search for a Standard Model Higgs boson decaying via H →ZZ→ℓ+ℓ−νν, where ℓ represents electrons or muons, is presented. It is based on proton–proton collision data at  √ s = 7 TeV, collected by the ATLAS experiment at the LHC during 2011 and corresponding to an integrated luminosity of 4.7 fb−1. The data agree with the expected Standard Model backgrounds. Upper limits on the Higgs boson production cross section are derived for Higgs boson masses between 200 GeV and 600 GeV and the production of a Standard Model Higgs boson with a mass in the range 319–558 GeV is excluded at the 95% confidence levelWe thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF, DNSRC and Lundbeck Foundation, Denmark; EPLANET and ERC, European Union; IN2P3-CNRS, CEA-DSM/IRFU, France; GNAS, Georgia; BMBF, DFG, HGF, MPG and AvH Foundation, Germany; GSRT, Greece; ISF, MINERVA, GIF, DIP and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Netherlands; RCN, Norway; MNiSW, Poland; GRICES and FCT, Portugal; MERYS (MECTS), Romania; MES of Russia and ROSATOM, Russian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; ARRS and MVZT, Slovenia; DST/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SER, SNSF and Cantons of Bern and Geneva, Switzerland; NSC, Taiwan; TAEK, Turkey; STFC, the Royal Society and Leverhulme Trust, United Kingdom; DOE and NSF, United States of America. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN and the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA) and in the Tier-2 facilities worldwid
High quality YBa2Cu3O7-delta films with controllable in-plane orientations grown on yttria-stabilized zirconia substrates

[[abstract]]The pulsed-laser deposition (PLD) technique was used to grow high T-C superconducting YBa2Cu3O7-delta (YBCO) films on both virgin and ion-bombarded yttria-stabilized zirconia (YSZ) substrates. To pattern high T-C films for device applications, the ion milling technique is often used to turn virgin YSZ substrates into ion-bombarded substrates. Multilayered processes require the growth of high T-C films on these ion-bombarded substrates. The purpose of this work was to investigate the growing conditions for these two kinds of substrate surfaces. We found that high quality 0 degrees in-plane orientation films can be grown on either substrate when the growth temperature is about 810 degrees C. The thin film grown at this temperature has T-C of about 90.3 K and J(C) of about 4x10(6) A cm(-2) at 77 K. On virgin substrates, the in-plane orientations of YBCO films grown within the temperature range of 790-730 degrees C exhibit a mixture of 0 degrees and 45 degrees domains. As the growth temperature decreases, the dominant orientation shifts gradually from 0 degrees to 45 degrees. On the other hand, on ion-bombarded YSZ substrates, the in-plane orientation of YBCO films grown within the same temperature range shows that the 45 degrees domain is more prominent. Furthermore, 9 degrees subpeaks appear around the 0 degrees peak on ion-bombarded YSZ substrates. At a lower growth temperature of around 690 degrees C, only the 45 degrees domain exists on the virgin substrate, while a small amount of 0 degrees domain is present with the majority of 45 degrees domain on the ion-bombarded substrate. The T-C and J(C) of the films grown at around 690 degrees C on virgin substrates are as good as films grown at high temperatures, despite the difference in the in-plane orientations.[[fileno]]2010140010015[[department]]物理
Mass scales and crossover phenomena in the homogeneous sine-Gordon models.

The finite-size behaviours of the homogeneous sine-Gordon models are analysed in detail, using the thermodynamic Bethe ansatz. Crossovers are observed which allow scales associated with both stable and unstable quantum particles to be picked up. By introducing the concept of shielding, we show that these match precisely with the mass scales found classically, supporting the idea that the full set of unstable particle states persists even far from the semiclassical regime. General rules for the effective TBA systems governing individual crossovers are given, and we also comment on the Lagrangian treatment of the theories, novel issues which arise in the form-factor approach for theories with unstable particles, and the role of heterotic cosets in the staircase flows exhibited by the HSG models
Two-loop QCD corrections to gluon-gluon scattering.

We present the  virtual QCD corrections to gluon–gluon scattering due to the interference of tree- and two-loop amplitudes. We work in conventional dimensional regularisation and give analytic expressions renormalised in the  scheme. The structure of the infrared divergences agrees with that predicted by Catani while formulae for the finite remainder are given in terms of logarithms and polylogarithms that are real in the physical region. These results, together with those previously obtained for quark–quark and quark–gluon scattering, complete the two-loop matrix elements needed for the next-to-next-to-leading order contribution to inclusive jet production at hadron colliders
Post-polio syndrome : analysis of inflammation and immune modulation

Poliomyelitis is a viral infection, which affects the anterior horn cells of the spinal cord leaving patients with different levels and distribution of muscle weakness and loss of, or decreased, function. This situation has previously been regarded as a stable condition. However, following recovery from poliomyelitis, with or without remaining symptoms and after a stable period, some polio patients may develop Post-polio Syndrome (PPS), a syndrome characterized by new or increasing muscular weakness, pain, fatigue, and sensitivity to cold. The findings of increased cytokine levels in cerebrospinal fluid and peripheral blood has led to the conclusion that there is an inflammatory process underway in PPS.



One of the most common symptoms, in addition to muscle weakness, is pain and some earlier studies have presented evidence of an inflammatory process in muscle. This was confirmed in this research based on the findings of an elevated expression of the enzymes in the Prostaglandin E2 (PGE2) pathway, i.e. mPGES-1, COX-2, COX-1 and cPGES. This may explain muscle pain and opens new perspectives for specific treatment.



It has been speculated that the inflammation in PPS may have an autoimmune background. In this research there were no circulating immune complexes in the blood of the PPS patients. This reduces the possibility that the inflammation is driven by a complement mediated autoimmune process.



In some chronic inflammatory conditions there is an increase of blood lipids. In earlier studies of PPS patients, blood lipid levels have been found to be increased. In this study the blood lipids were normal, and thus, the inflammation does not appear to give rise to hyperlipidaemia.



The inflammation in PPS patients is down-regulated by immune-modulatory treatment, by means of IvIg, which is followed by a clinical improvement. However, it has been difficult to pinpoint and characterize responders and non-responders. When re-evaluating the PPS diagnosis 2-8 years after the treatment, patients still considered as suffering from PPS experienced a better outcome of the treatment than patients with a stable condition, i.e. non- PPS. This opens up for speculation that PPS may be divided into two different subgroups, unstable patients with PPS driven by an inflammatory process and stable patients with a slower deterioration possibly due to ageing and concomitant disorders
Measuring galaxy segregation with the mark connection function

Context. The clustering properties of galaxies belonging to different luminosity ranges or having different morphological types are different. These characteristics or “marks” permit us to understand the galaxy catalogs that carry all this information as realizations of marked point processes. Many attempts have been presented to quantify the dependence of the clustering of galaxies on their inner properties.\ud
Aims. The present paper summarizes methods on spatial marked statistics used in cosmology to disentangle luminosity, color or morphological segregation and introduces a new one in this context, the mark connection function. Methods. The methods used here are the partial correlation functions, including the cross-correlation function, the normalized mark correlation function, the mark variogram and the mark connection function. All these methods are applied to a volume-limited sample drawn from the 2dFGRS, using the spectral type η as the mark.\ud
Results. We show the virtues of each method to provide information about the clustering properties of each population, the dependence of the clustering on the marks, the similarity of the marks as a function of the pair distances, and the way to characterize the spatial correlation between the marks. We demonstrate by means of these statistics that passive galaxies exhibit a stronger spatial correlation than active galaxies at small scales (r \u10fc07 20 h−1 Mpc), and that the price for galaxies to be close together is in the smaller values of the assigned marks, which means in our case that they are more passive. Through the mark connection function we quantify the relative positioning of different types of galaxies within the overall clustering pattern.\ud
Conclusions. The different marked statistics provide different information about the clustering properties of each population. Different aspects of the segregation are encapsulated by each measure, which makes the new one introduced here – the mark connection function – particularly useful for understanding the spatial correlation between the marks.martinez@uv.es; armurpa@uv.e
Search for dijet resonances in proton-proton collisions at sqrt(s) = 13
  TeV and constraints on dark matter and other models

A search is presented for narrow resonances decaying to dijet final states in
proton-proton collisions at sqrt(s) = 13 TeV using data corresponding to an
integrated luminosity of 12.9 inverse femtobarns. The dijet mass spectrum is
well described by a smooth parameterization and no significant evidence for the
production of new particles is observed. Upper limits at 95% confidence level
are reported on the production cross section for narrow resonances with masses
above 0.6 TeV. In the context of specific models, the limits exclude string
resonances with masses below 7.4 TeV, scalar diquarks below 6.9 TeV, axigluons
and colorons below 5.5 TeV, excited quarks below 5.4 TeV, color-octet scalars
below 3.0 TeV, W' bosons below 2.7 TeV, Z' bosons below 2.1 TeV and between 2.3
and 2.6 TeV, and RS gravitons below 1.9 TeV. These extend previous limits in
the dijet channel. Vector and axial-vector mediators in a simplified model of
interactions between quarks and dark matter are excluded below 2.0 TeV. The
first limits in the dijet channel on dark matter mediators are presented as
functions of dark matter mass and are compared to the exclusions of dark matter
in direct detection experiments.Comment: Replaced with the published version. Added the journal reference. All
  the figures and tables can be found at
  http://cms-results.web.cern.ch/cms-results/public-results/publications/EXO-16-032/index.htm
Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties

Context. At about 1000 days after the launch of Gaia we present the first Gaia data release, Gaia DR1, consisting of astrometry and photometry for over 1 billion sources brighter than magnitude 20.7. <BR /> Aims: A summary of Gaia DR1 is presented along with illustrations of the scientific quality of the data, followed by a discussion of the limitations due to the preliminary nature of this release. <BR /> Methods: The raw data collected by Gaia during the first 14 months of the mission have been processed by the Gaia Data Processing and Analysis Consortium (DPAC) and turned into an astrometric and photometric catalogue. <BR /> Results: Gaia DR1 consists of three components: a primary astrometric data set which contains the positions, parallaxes, and mean proper motions for about 2 million of the brightest stars in common with the Hipparcos and Tycho-2 catalogues - a realisation of the Tycho-Gaia Astrometric Solution (TGAS) - and a secondary astrometric data set containing the positions for an additional 1.1 billion sources. The second component is the photometric data set, consisting of mean G-band magnitudes for all sources. The G-band light curves and the characteristics of  3000 Cepheid and RR Lyrae stars, observed at high cadence around the south ecliptic pole, form the third component. For the primary astrometric data set the typical uncertainty is about 0.3 mas for the positions and parallaxes, and about 1 mas yr[SUP]-1[/SUP] for the proper motions. A systematic component of  0.3 mas should be added to the parallax uncertainties. For the subset of  94 000 Hipparcos stars in the primary data set, the proper motions are much more precise at about 0.06 mas yr[SUP]-1[/SUP]. For the secondary astrometric data set, the typical uncertainty of the positions is  10 mas. The median uncertainties on the mean G-band magnitudes range from the mmag level to 0.03 mag over the magnitude range 5 to 20.7. <BR /> Conclusions: Gaia DR1 is an important milestone ahead of the next Gaia data release, which will feature five-parameter astrometry for all sources. Extensive validation shows that Gaia DR1 represents a major advance in the mapping of the heavens and the availability of basic stellar data that underpin observational astrophysics. Nevertheless, the very preliminary nature of this first Gaia data release does lead to a number of important limitations to the data quality which should be carefully considered before drawing conclusions from the data.Peer reviewe
On vacuum energies and renomalizability in integrable quantum field theories

We compute for various perturbed conformal field theories the vacuum energies by means of the thermodynamic Bethe ansatz. Depending on the infrared and ultraviolet divergencies of the models, governed by the scaling dimensions of the underlying perturbed conformal field theory in the ultraviolet, the vacuum energies exhibit different types of characteristics. In particular, for the homogeneous sine-Gordon models we observe that once the conformal dimension of the perturbing scalar field is smaller or greater than 1/2, the vacuum energies are positive or negative, respectively. This behaviour indicates the need for additional ultraviolet counterterms in the latter case. At the transition points we obtain an infinite vacuum energy, which is partly explainable with the presence of several free fermions in the models studied