283 research outputs found
Risk factors associated with maternal satisfaction during childbirth: a retrospective cohort study
RĂ©sumĂ©: Objectif: Les facteurs qui contribuent Ă la satisfaction maternelle de la prise en charge anesthĂ©sique pendant l'accouchement restent peu connus. L'objectif de cette Ă©tude Ă©tait d'Ă©valuer ces facteurs. MĂ©thode: Nous avons rĂ©alisĂ© une Ă©tude de cohorte rĂ©trospective sur les parturientes admises entre janvier 2004 et dĂ©cembre 2008. Nous avons extrait du dossier les donnĂ©es dĂ©mographiques, les co-morbiditĂ©s, les interventions anesthĂ©siques et obstĂ©tricales rĂ©alisĂ©es, et diffĂ©rents Ă©lĂ©ments du vĂ©cu de l'anesthĂ©sie. La satisfaction maternelle a Ă©tĂ© mesurĂ©e au moyen d'une Ă©chelle numĂ©rique de 0 Ă 10 (0=pas satisfait du tout, 10=entiĂšrement satisfait) 24h aprĂšsl'accouchement. Une valeurâ€6 a Ă©tĂ© utilisĂ©e comme indiquant l'insatisfaction. Nous avons ainsi identifiĂ© dans une analyse multivariĂ©e les diffĂ©rents prĂ©dicteurs de la satisfaction maternelle, notamment la douleur, le vĂ©cu global de la technique, les dĂ©lais d'attente et la prĂ©sence de complications anesthĂ©siques, obstĂ©tricales ou nĂ©onatales. RĂ©sultats: Des 15 386 parturientes admises, 10 034 avaient un dossier complet et de ce nombre, 761 (7,6 %) Ă©taient insatisfaites de leur prise en charge. Parmi les facteurs diminuant la satisfaction, on retrouvait la grossesse Ă risque [rapport de cotes (RC): 0,59 et intervalle de confiance (IC) Ă 95 %: 0,34-1,02] et l'accouchement difficile [RC (IC95 %): 0,62 (0,52-0,74)]. La douleur, le vĂ©cu global nĂ©gatif de l'intervention, le retard, la mauvaise coordination dans la prise en charge et la prĂ©sence de complications diminuaient la satisfaction [RC (IC95 %): 0,07 Ă 0,71]; P<0,001. Conclusion: La satisfaction maternelle de l'anesthĂ©sie est largement dĂ©terminĂ©e par l'efficacitĂ© et le bon dĂ©roulement de l'intervention tant sur le plan technique qu'humain. NĂ©anmoins d'autres facteurs tels que la bonne coordination de la prise en charge des parturientes et l'absence de complications influencent Ă©galement la satisfactio
Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at sâ = 8 TeV
The combination of measurements of the W boson polarization in top quark decays performed by the ATLAS and CMS collaborations is presented. The measurements are based on proton-proton collision data produced at the LHC at a centre-of-mass energy of 8 TeV, and corresponding to an integrated luminosity of about 20 fbâ1 for each experiment. The measurements used events containing one lepton and having different jet multiplicities in the final state. The results are quoted as fractions of W bosons with longitudinal (F0), left-handed (FL), or right-handed (FR) polarizations. The resulting combined measurements of the polarization fractions are F0 = 0.693 ± 0.014 and FL = 0.315 ± 0.011. The fraction FR is calculated from the unitarity constraint to be FR = â0.008 ± 0.007. These results are in agreement with the standard model predictions at next-to-next-to-leading order in perturbative quantum chromodynamics and represent an improvement in precision of 25 (29)% for F0 (FL) with respect to the most precise single measurement. A limit on anomalous right-handed vector (VR), and left- and right-handed tensor (gL, gR) tWb couplings is set while fixing all others to their standard model values. The allowed regions are [â0.11, 0.16] for VR, [â0.08, 0.05] for gL, and [â0.04, 0.02] for gR, at 95% confidence level. Limits on the corresponding Wilson coefficients are also derived
Impact of Cytomegalovirus and Grafts versus Host Disease on the Dynamics of CD57+CD28âCD8+ T Cells After Bone Marrow Transplant
OBJECTIVES: The present study aimed to evaluate the dynamics of CD28 and CD57 expression in CD8+ T lymphocytes during cytomegalovirus viremia in bone marrow transplant recipients. METHODS: In a prospective study, blood samples were obtained once weekly once from 33 healthy volunteers and weekly from 33 patients. To evaluate the expression of CD57 and CD28 on CD8+ T lymphocytes, flow cytometry analysis was performed on blood samples for four months after bone marrow transplant, together with cytomegalovirus antigenemia assays. RESULTS: Compared to cytomegalovirus-seronegative healthy subjects, seropositive healthy subjects demonstrated a higher percentage of CD57+ and a lower percentage of CD28+ cells (p<0.05). A linear regression model demonstrated a continuous decrease in CD28+ expression and a continuous increase in CD57+ expression after bone marrow transplant. The occurrence of cytomegalovirus antigenemia was associated with a steep drop in the percentage of CD28+ cells (5.94%, p<0.01) and an increase in CD57+ lymphocytes (5.60%, p<0.01). This cytomegalovirus-dependent effect was for the most part concentrated in the allogeneic bone marrow transplant patients. The development of acute graft versus host disease, which occurred at an earlier time than antigenemia (day 26 vs. day 56 post- bone marrow transplant), also had an impact on the CD57+ subset, triggering an increase of 4.9% in CD57+ lymphocytes (p<0.05). CONCLUSION: We found continuous relative changes in the CD28+ and CD57+ subsets during the first 120 days post- bone marrow transplant, as part of immune system reconstitution and maturation. A clear correlation was observed between the expansion of the CD57+CD28-CD8+ T lymphocyte subpopulation and the occurrence of graft versus host disease and cytomegalovirus viremia
Modelling of micro-sources for security studies
International audienceThe interconnection of small, modular generation and storage technologies at the MV and LV distribution level have the potential to significantly impact power system performance. In this paper models of the main micro-generation sources are described. In particular, the models of Microturbines, Fuel Cells, Photovoltaic Systems and Wind Turbines, are described. In addition basic models of their power electronic interfaces are given. The integration of the above models in a steady state and dynamic simulation tool, which is developed in the framework of the EU funded MICROGRIDS project, will provide a simulation test platform, which will be necessary to define and evaluate the developed operational and control strategies
The CAMOMILE Collaborative Annotation Platform for Multi-modal, Multi-lingual and Multi-media Documents
International audienceIn this paper, we describe the organization and the implementation of the CAMOMILE collaborative annotation framework for multimodal, multimedia, multilingual (3M) data. Given the versatile nature of the analysis which can be performed on 3M data, the structure of the server was kept intentionally simple in order to preserve its genericity, relying on standard Web technologies. Layers of annotations, defined as data associated to a media fragment from the corpus, are stored in a database and can be managed through standard interfaces with authentication. Interfaces tailored specifically to the needed task can then be developed in an agile way, relying on simple but reliable services for the management of the centralized annotations. We then present our implementation of an active learning scenario for person annotation in video, relying on the CAMOMILE server; during a dry run experiment, the manual annotation of 716 speech segments was thus propagated to 3504 labeled tracks. The code of the CAMOMILE framework is distributed in open source
To-many or to-one? All-in-one! Efficient purely functional multi-maps with type-heterogeneous hash-tries
An immutable multi-map is a many-to-many map data structure with expected fast insert and lookup operations. This data structure is used for applications processing graphs or many-to-many relations as applied in compilers, runtimes of programming languages, or in static analysis of object-oriented systems. Collection data structures are assumed to carefully balance execution time of operations with memory consumption characteristics and need to scale gracefully from a few elements to multiple gigabytes at least. When processing larger in-memory data sets the overhead of the data structure encoding itself becomes a memory usage bottleneck, dominating the overall performance. In this paper we propose AXIOM, a novel hash-trie data structure that allows for a highly efficient and type-safe multi-map encoding by distinguishing inlined values of singleton sets from nested sets of multi-mappings
Techniques&charlie
FrĂ©dĂ©ric Joulian AprĂšs lâassassinat des dessinateurs de Charlie Hebdo par des intĂ©gristes et les jours de tristesse, de colĂšre ou de communion collective que nous venons de vivre, il nous a semblĂ© important de ne pas nous taire, sous prĂ©texte de science et dâobjectivitĂ©. Une revue nâexiste vraiment que par les hommes et les femmes qui lâaniment, et, mĂȘme si la nĂŽtre est consacrĂ©e aux rapports sociaux aux techniques et aux objets, elle ne peut se faire sans engagement, sans empathie, sans rĂ©f..
Stellar Evolution at Low Metallicity
Massive stars played a key role in the early evolution of the Universe. They
formed with the first halos and started the re-ionisation. It is therefore very
important to understand their evolution. In this review, we first recall the
effect of metallicity (Z) on the evolution of massive stars. We then describe
the strong impact of rotation induced mixing and mass loss at very low Z. The
strong mixing leads to a significant production of primary nitrogen 14, carbon
13 and neon 22. Mass loss during the red supergiant stage allows the production
of Wolf-Rayet stars, type Ib,c supernovae and possibly gamma-ray bursts (GRBs)
down to almost Z=0 for stars more massive than 60 solar masses. Galactic
chemical evolution models calculated with models of rotating stars better
reproduce the early evolution of N/O, C/O and C12/C13. Finally, the impact of
magnetic fields is discussed in the context of GRBs.Comment: 12 pages, 7 figures, "Massive Stars as Cosmic Engines" Conference
proceedings (IAU Symp 250), F. Bresolin, P.A. Crowther, J. Puls Ed
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