Pneumocystis jirovecii Transmission from Immunocompetent Carriers to Infant

We report a case of Pneumocystis jirovecii transmission from colonized grandparents to their infant granddaughter. Genotyping of P. jirovecii showed the same genotypes in samples from the infant and her grandparents. These findings support P. jirovecii transmission from immunocompetent carrier adults to a susceptible child

Vertical Transmission of Pneumocystis jirovecii in Humans

This study is part of the project “Pneumocystis Pathogenomics: Unravelling the Colonization-to-Disease Shift,” a Coordination Action supported by the European Commission (ERANET PathoGenoMics). This study was partially supported by the Spanish Ministry of Health (FIS 03/1743). M.A.M.-C. and C.d.l.H. were supported by the Spanish Ministry of Health (FIS CP-04/217 and FIS CM-04/146).Ye

Políticas de software libre en el Estado argentino

Este estudio tiene como objetivo conocer la situación actual del software libre en los organismos públicos argentinos con la finalidad de identificar pautas para desarrollar políticas de uso de herramientas FLOSS en los mismos. Se coincide que uno de los ámbitos más favorables para la difusión del software libre son los organismos públicos. Experiencias exitosas como las emprendidas por entidades gubernamentales de España y Alemania, y de países más cercanos como Brasil y Venezuela, demuestran que son una alternativa atractiva para ser imitada por los entes estatales de nuestro país. Diversos estudios nos dicen que las herramientas FLOSS tienen una ecuación favorable cuando se las compara con los productos de software comercial equivalentes; esta ecuación favorable está basada no sólo variables técnicas y económicas, sino también socio-políticas. En nuestros trabajos de investigación anteriores abordamos el fenómeno del FLOSS desde la óptica de las organizaciones privadas usuarias de software libre en nuestro medio. Nuestra propuesta para el ciclo 2010/11 es continuar el análisis del movimiento FLOSS, enfocando nuestra investigación en el comportamiento de los organismos públicos argentinos como usuarios de productos y servicios open source.Sociedad Argentina de Informática e Investigación Operativ

Pneumocystis jirovecii in General Population

P. jirovecii colonization can be frequently detected in immunocompetent adults, which suggests that the general population could be a source of this infection

Archaeology of insular sectors in the Beagle Channel (Argentina). The case of the archipelago of the Bridges Islands and adjacent islands

En este trabajo se exponen los resultados de las recientes investigaciones arqueológicas realizadas en el sector del archipiélago de las islas Bridges e islas adyacentes (canal Beagle, Tierra del Fuego, Argentina). El uso del ambiente que llevaron a cabo los cazadores-recolectores marítimos de esta región es conocido a partir de los estudios efectuados principalmente en sitios arqueológicos de la costa sur de la Isla Grande de Tierra del Fuego y de la costa norte de la isla Navarino. Hasta el momento no se había desarrollado de manera sistemática el estudio de islas pequeñas o islotes en el canal Beagle. Aquí se analiza el uso del archipiélago de las islas Bridges en relación con la distribución espacial y temporal de los sitios, así como el estudio de las estrategias humanas de su ocupación en función de la composición de los conjuntos arqueológicos. Los resultados obtenidos evidencian que el archipiélago de las islas Bridges fue integrado en los circuitos de movilidad regional desde el Holoceno medio, aunque los hallazgos indican una baja intensidad de ocupación para estos momentos. La elevada frecuencia de estructuras de concheros, así como el tamaño de sitios arqueológicos registrados en sectores circundantes a la línea de costa actual señalan una mayor intensidad de ocupación para momentos más tardíos del Holoceno. En conclusión, esta evidencia y la composición de los conjuntos arqueológicos conducen a sostener un uso programado de estos espacios a partir de la obtención de recursos que resultan críticos para la habitabilidad humana de estos sectores.This paper presents the results of recent archaeological investigations carried out in the Bridges Islands archipelago and adjacent islands (Beagle Channel, Tierra del Fuego, Argentina). The use of this environment by maritime hunter-gatherers is known from research carried out mainly in archaeological sites along the southern coast of the Isla Grande de Tierra del Fuego and the northern coast of Navarino Island. Until now, the study of small islands or islets in the Beagle Channel had not been systematically developed. Here, we analyze the use of the Bridges Islands archipelago in relation to the spatial and temporal distribution of the archaeological sites, as well as the study of human subsistence and settlement patterns, based on the composition of the archaeological assemblages. The results obtained show that the archipelago of the Bridges Islands was integrated into the regional mobility circuits since the Middle Holocene, although the findings indicate a low occupation intensity by that time. The high frequency of shell middens, as well as the size of archaeological sites recorded in sectors near the current coastline, points to a greater intensity of occupation for later moments of the Holocene. In conclusion, this evidence and the composition of archaeological assemblages lead to sustain a planned use of these spaces from the procurement of critical resources for the human habitability of these sectors

Multiplicity dependence of jet-like two-particle correlations in p-Pb collisions at sNN\sqrt{s_{NN}} = 5.02 TeV

Two-particle angular correlations between unidentified charged trigger and associated particles are measured by the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. The transverse-momentum range 0.7 $< p_{\rm{T}, assoc} < p_{\rm{T}, trig} <$ 5.0 GeV/$c$ is examined, to include correlations induced by jets originating from low momen\-tum-transfer scatterings (minijets). The correlations expressed as associated yield per trigger particle are obtained in the pseudorapidity range $|\eta|<0.9$. The near-side long-range pseudorapidity correlations observed in high-multiplicity p-Pb collisions are subtracted from both near-side short-range and away-side correlations in order to remove the non-jet-like components. The yields in the jet-like peaks are found to be invariant with event multiplicity with the exception of events with low multiplicity. This invariance is consistent with the particles being produced via the incoherent fragmentation of multiple parton--parton scatterings, while the yield related to the previously observed ridge structures is not jet-related. The number of uncorrelated sources of particle production is found to increase linearly with multiplicity, suggesting no saturation of the number of multi-parton interactions even in the highest multiplicity p-Pb collisions. Further, the number scales in the intermediate multiplicity region with the number of binary nucleon-nucleon collisions estimated with a Glauber Monte-Carlo simulation.Comment: 23 pages, 6 captioned figures, 1 table, authors from page 17, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/161

Charge separation relative to the reaction plane in Pb-Pb collisions at sNN=2.76\sqrt{s_{\rm NN}}= 2.76 TeV

Measurements of charge dependent azimuthal correlations with the ALICE detector at the LHC are reported for Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV. Two- and three-particle charge-dependent azimuthal correlations in the pseudo-rapidity range $|\eta| < 0.8$ are presented as a function of the collision centrality, particle separation in pseudo-rapidity, and transverse momentum. A clear signal compatible with a charge-dependent separation relative to the reaction plane is observed, which shows little or no collision energy dependence when compared to measurements at RHIC energies. This provides a new insight for understanding the nature of the charge dependent azimuthal correlations observed at RHIC and LHC energies.Comment: 12 pages, 3 captioned figures, authors from page 2 to 6, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/286

Multi-particle azimuthal correlations in p-Pb and Pb-Pb collisions at the CERN Large Hadron Collider

Measurements of multi-particle azimuthal correlations (cumulants) for charged particles in p-Pb and Pb-Pb collisions are presented. They help address the question of whether there is evidence for global, flow-like, azimuthal correlations in the p-Pb system. Comparisons are made to measurements from the larger Pb-Pb system, where such evidence is established. In particular, the second harmonic two-particle cumulants are found to decrease with multiplicity, characteristic of a dominance of few-particle correlations in p-Pb collisions. However, when a $|\Delta \eta|$ gap is placed to suppress such correlations, the two-particle cumulants begin to rise at high-multiplicity, indicating the presence of global azimuthal correlations. The Pb-Pb values are higher than the p-Pb values at similar multiplicities. In both systems, the second harmonic four-particle cumulants exhibit a transition from positive to negative values when the multiplicity increases. The negative values allow for a measurement of $v_{2}\{4\}$ to be made, which is found to be higher in Pb-Pb collisions at similar multiplicities. The second harmonic six-particle cumulants are also found to be higher in Pb-Pb collisions. In Pb-Pb collisions, we generally find $v_{2}\{4\} \simeq v_{2}\{6\}\neq 0$ which is indicative of a Bessel-Gaussian function for the $v_{2}$ distribution. For very high-multiplicity Pb-Pb collisions, we observe that the four- and six-particle cumulants become consistent with 0. Finally, third harmonic two-particle cumulants in p-Pb and Pb-Pb are measured. These are found to be similar for overlapping multiplicities, when a $|\Delta\eta| > 1.4$ gap is placed.Comment: 25 pages, 11 captioned figures, 3 tables, authors from page 20, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/87

A note on comonotonicity and positivity of the control components of decoupled quadratic FBSDE

In this small note we are concerned with the solution of Forward-Backward Stochastic Differential Equations (FBSDE) with drivers that grow quadratically in the control component (quadratic growth FBSDE or qgFBSDE). The main theorem is a comparison result that allows comparing componentwise the signs of the control processes of two different qgFBSDE. As a byproduct one obtains conditions that allow establishing the positivity of the control process.Comment: accepted for publicatio