pinecone/core-2020-05-10-deduplication huggingface dataset:
The Gaia-ESO Survey: the analysis of high-resolution UVES spectra of FGK-type stars

Context. The Gaia-ESO Public Spectroscopic Survey is obtaining high-quality spectroscopic data for about 10^5 stars using FLAMES at the VLT. With the FLAMES-UVES link, high-resolution spectra are being collected for about 5 000 FGK-type stars. Aims. These UVES spectra are analyzed in parallel by several state-of-the-art methodologies. Our aim is to present how these analyses were implemented, to discuss their results, and to describe how a final recommended parameter scale is defined. We also discuss the precision (method-to-method dispersion) and accuracy (biases with respect to the reference values) of the final parameters. These results are part of the Gaia-ESO second internal release and will be part of its first public release of advanced data products. Methods. The final parameter scale is tied to the one defined by the Gaia benchmark stars, a set of stars with fundamental atmospheric parameters. In addition, a set of open and globular clusters is used to evaluate the physical soundness of the results. Each of the implemented methodologies is judged against the benchmark stars to define weights in three di_erent regions of the parameter space. The final recommended results are the weighted-medians of those from the individual methods. Results. The recommended results successfully reproduce the benchmark stars atmospheric parameters and the expected Te_eff-log g relation of the calibrating clusters. Atmospheric parameters and abundances have been determined for 1301 FGK-type stars observed with UVES. The median of the method-to-method dispersion of the atmospheric parameters is 55K for Te_eff, 0.13 dex for log g, and 0.07 dex for [Fe/H]. Systematic biases are estimated to be between 50-100 K for Te_eff, 0.10-0.25 dex for log g, and 0.05-0.10 dex for [Fe/H]. Abundances for 24 elements were derived: C, N, O, Na, Mg, Al, Si, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Mo, Ba, Nd, and Eu. The typical method-to-method dispersion of the abundances varies between 0.10 and 0.20 dex. Conclusions. The Gaia-ESO sample of high-resolution spectra of FGK-type stars will be among the largest of its kind analyzed in a homogeneous way. The extensive list of elemental abundances derived in these stars will enable significant advances in the areas of stellar evolution and Milky-Way formation and evolution
Subglacial processes on an Antarctic ice stream bed 2: Can modelled ice dynamics explain the morphology of mega-scale glacial lineations?

Mega-scale glacial lineations (MSGLs) are highly elongate subglacial bedforms associated with ice streaming. However, the link between MSGLs and rapid ice flow is largely qualitative, and there have been few attempts to quantitatively link their formation to ice flow characteristics (e.g. ice velocity, thickness, basal shear stress). We take measurements of MSGLs from a palaeo-ice stream that once occupied Marguerite Trough, Antarctic Peninsula and explore a range of possible correlations with ice dynamics generated from an ensemble of numerical modelling experiments that reproduce the deglaciation of the ice stream. Our results confirm that high mean ice velocities and a weak bed correlate with longer MSGLs. Furthermore, the height of MSGLs are low (2–3 m) where modelled basal shear stress is low, but their height tends to be higher and more variable where basal shear stress is larger. The mean density of MSGLs decreases as ice flux increases. Our analysis further suggests that the length of MSGLs is a function of basal ice velocity and time. Although our data/model correlations confirm the importance of ice velocity in MSGL formation, a significant challenge remains if we are to employ MSGLs as a quantifiable measure of past ice stream velocity
Importance of knowledge management processes in a project-based organization : a case study of research enterprise

Knowledge Management (KM) is vital factor to successfully undertake projects. The temporary nature of projects necessitates employing useful KM practices for tackling issues such as knowledge leakiness and rework. The Project Management Office (PMO) is a unit within organizations to facilitate and oversee organizational projects. Project Management Maturity Models (PMMM) shows the development of PMOs from immature to mature levels. The existing PMMMs have focused on discussing Project Management (PM) practices, however, the management of project knowledge is yet to be addressed, at various levels of maturity. This research project was undertaken to investigate the mentioned gap for addressing KM practices at the existing PMMMs. Due to the exploratory and inductive nature of this research, qualitative methods were chosen as the research methodology. In total, three cases selected from different industries: research; mining and government organizations, to provide broad categories for research and research questions were examined using the developed framework. This paper presents the partial findings of undertaken investigation of the research organisation with the lowest level of maturity. The result shows that knowledge creation and capturing are the most important processes, while knowledge transferring and reusing are not as important as the other two processes. In addition, it was revealed that provision of “knowledge about client” and “project management knowledge” are the most important types of knowledge that are required at this level of maturity. In conclusion, the outcomes of this paper shall provide powerful guidance to PMOs at lowest level of maturity from KM point of view
Simultaneous multi-frequency observation of the unknown redshift blazar PG 1553+113 in March-April 2008

The blazar PG 1553+113 is a well known TeV γ-ray emitter. In this paper, we determine its spectral energy distribution using simultaneous multi- frequency data in order to study its emission processes. An extensive campaign was carried out between March and April 2008, where optical, X-ray, high-energy (HE) γ-ray, and very-high-energy (VHE) γ-ray data were obtained with the KVA, Abastumani, REM, RossiXTE/ASM, AGILE and MAGIC telescopes, respectively. This is the first simultaneous broad-band (i.e., HE+VHE) γ-ray observation, though AGILE did not detect the source. We combine data to derive source’s spectral energy distribution and interpret its double peaked shape within the framework of a synchrotron self compton model
A Classification of DC Node Voltage Control Methods for HVDC Grids

In a DC grid, contingencies such as converter outages give rise to a current imbalance that is reflected in the DC node voltages in the grid. This imbalance has to be accounted for by changing the currents flowing in and out of the DC system. These DC node voltages can be directly influenced by controlling the DC current of the HVDC converter at that node. Different control strategies can be applied to balance the currents in a DC grid after a contingency.
In this paper, the different converter control strategies are introduced systematically, thereby aiming to provide a framework for classifying the different converter control strategies available in literature. It is discussed how all converter control strategies theoretically can be regarded as limiting cases of a voltage droop control. It is also explained how the different converter control concepts can be combined, leading to more advanced converter control schemes such as voltage margin control, dead-band droop control and undead-band droop control.
Based on the introduced converter control strategies, different grid control strategies are introduced and classified. The application of the advanced converter control strategies results in advanced grid control strategies and the advantages of those are discussed.status: publishe
Single-neutron orbits near 78 Ni: Spectroscopy of the N=49 isotope 79 Zn

Single-neutron states in the Z=30 , N=49 isotope 79 Zn have been populated using the 78 Zn(d, p) 79 Zn transfer reaction at REX-ISOLDE, CERN. The experimental setup allowed the combined detection of protons ejected in the reaction, and of γ rays emitted by 79 Zn. The analysis reveals that the lowest excited states populated in the reaction lie at approximately 1 MeV of excitation, and involve neutron orbits above the N=50 shell gap. From the analysis of γ -ray data and of proton angular distributions, characteristic of the amount of angular momentum transferred, a 5/2+ configuration was assigned to a state at 983 keV. Comparison with large-scale-shell-model calculations supports a robust neutron N=50 shell-closure for 78 Ni. These data constitute an important step towards the understanding of the magicity of 78 Ni and of the structure of nuclei in the region
Multi-modal fission in collinear ternary cluster decay of 252 Cf(sf, fff)

We discuss the multiple decay modes of collinear fission in 252 Cf(sf, fff), with three fragments as suggested by the potential energy surface (PES). Fission as a statistical decay is governed by the phase space of the different decay channels, which are suggested in the PES-landscape. The population of the fission modes is determined by the minima in the PES at the scission points and on the internal potential barriers. The ternary collinear decay proceeds as a sequential process, in two steps. The originally observed ternary decay of 252 Cf(sf) into three different masses (e.g. 132–140 Sn, 52–48 Ca, 68–72 Ni), observed by the FOBOS group in the FLNR (Flerov Laboratory for Nuclear Reactions) of the JINR (Dubna) the collinear cluster tripartition (CCT), is one of the ternary fission modes. This kind of “true ternary fission” of heavy nuclei has often been predicted in theoretical works during the last decades. In the present note we discuss different ternary fission modes in the same system. The PES shows pronounced minima, which correspond to several modes of ternary fragmentations. These decays have very similar dynamical features as the previously observed CCT-decays. The data obtained in the experiments on CCT allow us to extract the yields for different decay modes using specific gates on the measured parameters, and to establish multiple modes of the ternary fission decay
Hydrodynamic regimes of spinning black D3-branes

We present the long-wavelength effective description of non-extremal spinning black D3-branes in flat space. Our setup is motivated by recent explorations of low energy dynamics on black brane world-volumes within the blackfold approach and its connections to the fluid/gravity correspondence. The spinning D3-branes with a rigid radial Dirichlet cut-off give rise to an effective field theory. This theory describes a charged plasma which is driven by external forces, given by one vector and two scalar operators. Furthermore, the flavour charge of this plasma is anomalous, allowing us to examine features of anomaly-induced transport in the blackfold context. We calculate the hydrodynamic transport coefficients to first order and show that in the near-horizon limit, they reproduce the conformal charged fluid dynamics of N = 4 $$ \mathcal{N}=4 $$ Super Yang-Mills theory. More generally the system interpolates smoothly between the blackfold, fluid/gravity, and Rindler fluid dynamics
Incremental infrastructures: material improvisation and social collaboration across post-colonial Accra

Approaching the informal construction and extension of infrastructures through the terrain of what I term "the incremental" opens up new platforms of analysis for post-colonial urban systems. This refers to ad hoc actions on the part of slum dwellers to connect to energy networks or carve out informal living spaces. I argue that incrementalism is produced and subsequently secured and scaled through material configurations that seek to test and prefigure new forms of infrastructure and accompanying resource flows. I use a case study of energy and housing systems in a low-income neighborhood in Accra to define and examine these incremental infrastructures. I examine shifts in the Accra energy network as urban dwellers rework connections to flows of electricity. I also consider the material adjustment of housing and the role of cooperation in responding to threats of demolition and displacement. Together, incremental infrastructures and the ways that they are constituted articulate a prefigurative politics in which residents seek to generate access to new infrastructural worlds
Environmental factors prevail over dispersal constraints in determining the distribution and assembly of Trichoptera species in mountain lakes

15 páginas, 5 tablas, 4 figuras.Aiming to elucidate whether large-scale dispersal factors or environmental species\ud
sorting prevail in determining patterns of Trichoptera species composition\ud
in mountain lakes, we analyzed the distribution and assembly of the most common\ud
Trichoptera (Plectrocnemia laetabilis, Polycentropus flavomaculatus, Drusus\ud
rectus, Annitella pyrenaea, and Mystacides azurea) in the mountain lakes of the\ud
Pyrenees (Spain, France, Andorra) based on a survey of 82 lakes covering the\ud
geographical and environmental extremes of the lake district. Spatial autocorrelation\ud
in species composition was determined using Moran’s eigenvector maps\ud
(MEM). Redundancy analysis (RDA) was applied to explore the influence of\ud
MEM variables and in-lake, and catchment environmental variables on Trichoptera\ud
assemblages. Variance partitioning analysis (partial RDA) revealed the\ud
fraction of species composition variation that could be attributed uniquely to\ud
either environmental variability or MEM variables. Finally, the distribution of\ud
individual species was analyzed in relation to specific environmental factors\ud
using binomial generalized linear models (GLM). Trichoptera assemblages\ud
showed spatial structure. However, the most relevant environmental variables\ud
in the RDA (i.e., temperature and woody vegetation in-lake catchments) were\ud
also related with spatial variables (i.e., altitude and longitude). Partial RDA\ud
revealed that the fraction of variation in species composition that was uniquely\ud
explained by environmental variability was larger than that uniquely explained\ud
by MEM variables. GLM results showed that the distribution of species with\ud
longitudinal bias is related to specific environmental factors with geographical\ud
trend. The environmental dependence found agrees with the particular traits of\ud
each species. We conclude that Trichoptera species distribution and composition\ud
in the lakes of the Pyrenees are governed predominantly by local environmental\ud
factors, rather than by dispersal constraints. For boreal lakes, with\ud
similar environmental conditions, a strong role of dispersal capacity has been\ud
suggested. Further investigation should address the role of spatial scaling,\ud
namely absolute geographical distances constraining dispersal and steepness of\ud
environmental gradients at short distances.This study was supported by the EU-projects\ud
EMERGE (EVK1-CT-1999-00032) and EUROLIMPACS\ud
(GOCE-CT-2003-505540); the\ud
Spanish Government projects GRACCIE\ud
(CSD2007-00067), and LACUS (Ministerio de\ud
Economı´a y Competitividad, CGL2013-\ud
45348-P); and the Generalitat Research\ud
Group (2014SGR1249). MV also benefitted\ud
from the funding of the project Invasive fish\ud
(427/2011), the Biodiversity Conservation\ud
Plan from ENDESA S.A. (6900014499), and\ud
the LIFE LimnoPirineus project (LIFE13-NATES-\ud
001210).Peer reviewe
EFFECTS OF TROPICAL CYCLONES ON OCEAN HEAT TRANSPORT AS SIMULATED BY A HIGH RESOLUTION COUPLED GENERAL CIRCULATION MODEL

In this study the interplay between Tropical Cyclones (TCs) and the Northern hemispheric Ocean Heat Transport (OHT) is investigated. In particular, results from a numerical simulation of the 20th and 21st Century climate, following the Intergovernmental Panel for Climate Change (IPCC) 20C3M and A1B scenario protocols respectively have been analyzed. The numerical simulations have been performed using a state-of-the-art global atmosphere-ocean-sea-ice coupled general circulation model - CGCM (CMCC-MED, Gualdi et al. 2010, Scoccimarro et al. 2010) with relatively high-resolution (T159) in the atmosphere. The model is an evolution of the INGV-SXG (Gualdi et al. 2008, Bellucci et al. 2008) and the ECHAM-OPA-LIM (Fogli et al. 2009, Vichi et al. 2010) The simulated TCs exhibit realistic structure, geographical distribution (Fig.2) and interannual variability, indicating that the model is able to capture the basic mechanisms linking the TC activity with the large scale circulation. The cooling of the surface ocean observed in correspondence of the TCs is well simulated by the model (Fig.3). TC activity is shown to significantly affect the poleward OHT out of the tropics, and the heat transport into the deep tropics (Fig.4). This effect, investigated by looking at the 100 most intense Northern Hemisphere TCs, is strongly correlated with the TC-induced momentum flux at the ocean surface (Fig.7). TCs frequency and
intensity appear to be substantially stationary through the whole 1950-2069 simulated period as well as the effect of the TCs on the meridional OHT
Foreground objects segmentation for moving camera scenarios based on SCGMM

In this paper we present a new system for segmenting non-rigid objects in moving camera sequences for indoor and outdoor sce\ud
narios that achieves a correct object segmentation via global MAP-MRF\ud
framework formulation for the foreground and background classification\ud
task. Our proposal, suitable for video indexation applications, receives\ud
as an input an initial segmentation of the object to segment and it consists of two region-based parametric probabilistic models to model the\ud
spatial (x,y) and color (r,g,b) domains of the foreground and background\ud
classes. Both classes rival each other in modeling the regions that appear\ud
within a dynamic region of interest that includes the foreground object\ud
to segment and also, the background regions that surrounds the object.\ud
The results presented in the paper show the correctness of the object\ud
segmentation, reducing false positive and false negative detections originated by the new background regions that appear near the region of the\ud
objectPeer ReviewedPostprint (published version
Internationalization within networks : exploring the relationship between inward and outward FDI in China’s auto components industry.

We explore how the outward FDI strategies of Chinese auto component multinational corporations (MNCs) are shaped by sub-contracting supply relationships established with developed market MNCs. We argue the strong presence of foreign MNC business networks developed through prior inward FDI constitutes an important home country effect influencing the outward FDI strategies of emerging market MNCs. Using the updated internationalization process model, we show how commitment to business networks is a critical mechanism driving the internationalization trajectories of Chinese auto component MNCs. This includes geographic location choices to psychically distant developed markets, strategic asset seeking orientation, pace of internationalization, and entry mode decisions
Construction and classification of novel BPS Wilson loops in quiver
  Chern-Simons-matter theories

In this paper we construct and classify novel Drukker-Trancanelli (DT) type
BPS Wilson loops along infinite straight lines and circles in $\mathcal N=2,3$
quiver superconformal Chern-Simons-matter theories,
Aharony-Bergman-Jafferis-Maldacena (ABJM) theory, and $\mathcal N=4$ orbifold
ABJM theory. Generally we have four classes of Wilson loops, and all of them
preserve the same supersymmetries as the BPS Gaiotto-Yin (GY) type Wilson
loops. There are several free complex parameters in the DT type BPS Wilson
loops, and for two classes of Wilson loops in ABJM theory and $\mathcal N=4$
orbifold ABJM theory there are supersymmetry enhancements at special values of
the parameters. We check that the differences of the DT type and GY type Wilson
loops are $Q$-exact with $Q$ being some supercharges preserved by both the DT
type and GY type Wilson loops. The results would be useful to calculate vacuum
expectation values of the DT type Wilson loops in matrix models if they are
still BPS quantum mechanically.Comment: V1, 28 pages; V2,35 pages, published versio
Decipher the short-distance component of $X(3872)$ in $B_c$ decays

A foremost task in understanding the nature of the $X(3872)$ involves the
discrimination of the two-quark and multiquark configurations. In this work, we
propose a method to probe the short-distance component of the $X(3872)$ by
measuring the ratio between the $B_c$ semileptonic and nonleptonic decays into
the $X(3872)$. We demonstrate that if the $X(3872)$ production mechanism is
through the $\bar cc$ component, the ratios would be universal and could be
reliably predicted in theory. Measurements of these ratios at LHC and the
next-generation electron-positron colliders are capable of
validating/invalidating this production mechanism and providing deeper insights
into the nature of the $X(3872)$.Comment: 7 pages, 1 figur
Observation of the $B_s^0 \rightarrow J/\psi \phi \phi$ decay

The $B_s^0 \rightarrow J/\psi \phi \phi$ decay is observed in $pp$ collision
data corresponding to an integrated luminosity of 3 fb$^{-1}$ recorded by the
LHCb detector at centre-of-mass energies of 7 TeV and 8 TeV. This is the first
observation of this decay channel, with a statistical significance of 15
standard deviations. The mass of the $B_s^0$ meson is measured to be
$5367.08\,\pm \,0.38\,\pm\, 0.15$ MeV/c$^2$. The branching fraction ratio
$\mathcal{B}(B_s^0 \rightarrow J/\psi \phi \phi)/\mathcal{B}(B_s^0 \rightarrow
J/\psi \phi)$ is measured to be $0.0115\,\pm\, 0.0012\, ^{+0.0005}_{-0.0009}$.
In both cases, the first uncertainty is statistical and the second is
systematic. No evidence for non-resonant $B_s^0 \rightarrow J/\psi \phi K^+
K^-$ or $B_s^0 \rightarrow J/\psi K^+ K^- K^+ K^-$ decays is found.Comment: All figures and tables, along with any supplementary material and
  additional information, are available at
  https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2015-033.htm
Landslide inventories for climate impacts research in the European Alps

Author's manuscript version. The final published article is available from the publisher via: doi:10.1016/j.geomorph.2014.09.005Copyright © 2014 Elsevier B.V. All rights reserved.Landslides present a geomorphological hazard in Alpine regions, threatening life, infrastructure and property. Here we present the development of a new regional landslide inventory (RI) for the European Alps. This database provides a substantial temporal and spatial picture of landsliding in the Alps, with particular focus on the Swiss and French Alps. We use segmented models to evaluate recording bias in the temporal record. We use scaling relationships to calculate landslide area based on a given volume for similar types of landslide; with the result of this being that 9.5% of the landslides recorded in the RI now have area data recorded. These landslide area data are then used to examine the log-linear trend, which exists between landslide area and frequency in inventories. We show that this relationship is present for this historical dataset; however, none of the individual databases, nor a unification of these, contain a complete record with the small and larger landslides being recorded more consistently. The use of segmented models on the temporal distribution of landslides in the RI shows that the post-1970 portion of the database is more reliable, highlighted through an improved power-law relationship, although the frequency of medium sized landslides is still underestimated. We show that creating a unified database (RI) can increase the reliability of datasets and consistency in recording for the use by researchers for attribution and detection studies.Lloyds of Londo