| 1. |
- Schael, S, et al.
(författare)
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Precision electroweak measurements on the Z resonance
- 2006
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Ingår i: Physics Reports. - : Elsevier BV. - 0370-1573 .- 1873-6270. ; 427:5-6, s. 257-454
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Forskningsöversikt (refereegranskat)abstract
- We report on the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP. The data consist of 17 million Z decays accumulated by the ALEPH, DELPHI, L3 and OPAL experiments at LEP, and 600 thousand Z decays by the SLID experiment using a polarised beam at SLC. The measurements include cross-sections, forward-backward asymmetries and polarised asymmetries. The mass and width of the Z boson, m(Z) and Gamma(Z), and its couplings to fermions, for example the p parameter and the effective electroweak mixing angle for leptons, are precisely measured: m(Z) = 91.1875 +/- 0.0021 GeV, Gamma(Z) = 2.4952 +/- 0.0023 GeV, rho(l) = 1.0050 +/- 0.0010, sin(2)theta(eff)(lept) = 0.23153 +/- 0.00016. The number of light neutrino species is determined to be 2.9840 +/- 0.0082, in agreement with the three observed generations of fundamental fermions. The results are compared to the predictions of the Standard Model (SM). At the Z-pole, electroweak radiative corrections beyond the running of the QED and QCD coupling constants are observed with a significance of five standard deviations, and in agreement with the Standard Model. Of the many Z-pole measurements, the forward-backward asymmetry in b-quark production shows the largest difference with respect to its SM expectation, at the level of 2.8 standard deviations. Through radiative corrections evaluated in the framework of the Standard Model, the Z-pole data are also used to predict the mass of the top quark, m(t) = 173(+10)(+13) GeV, and the mass of the W boson, m(W) = 80.363 +/- 0.032 GeV. These indirect constraints are compared to the direct measurements, providing a stringent test of the SM. Using in addition the direct measurements of m(t) and m(W), the mass of the as yet unobserved SM Higgs boson is predicted with a relative uncertainty of about 50% and found to be less than 285 GeV at 95% confidence level. (c) 2006 Elsevier B.V. All rights reserved.
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| 2. |
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| 3. |
- Li, Y., et al.
(författare)
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The kinetics of Ringer's solution in young and elderly patients during induction of general anesthesia with propofol and epidural anesthesia with ropivacaine
- 2007
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley-Blackwell. - 0001-5172 .- 1399-6576. ; 51:7, s. 880-887
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Different fluid regimens are often adopted for elderly patients, but it is not known whether they handle infused fluids differently during the induction of anesthesia than young patients.METHODS: Mean arterial pressure (MAP), plasma dilution (based on hemoglobin) and volume kinetics were assessed during an intravenous (i.v.) infusion of 1000 ml of lactated Ringer's solution over exactly 60 min in 29 patients given general anesthesia with propofol (15 < 65 years of age, and 14 > 65 years old) and in 16 patients receiving lumbar epidural anesthesia with titrated doses of ropivacaine (7 patients < 65 years of age and 9 > 65 years old).RESULTS: General anesthesia caused a greater decrease in MAP than epidural anesthesia (mean 15% vs. 9%; P < 0.001) and was followed by a more pronounced plasma dilution (30% vs. 18%; P < 0.001); the maximum values reaching 50%. The fluid-induced hemodilution increased after the onset of anesthesia. The distribution rate constant (k(t)), which governs the preference for infused fluid to retain the plasma, was significantly reduced, with the lowest values being reached during general anesthesia (P < 0.002). However, only the reduction of MAP, and not the patient's age group or the type of anesthesia per se, had a statistically significant influence on k(t) after the induction.CONCLUSION: Induction of anesthesia greatly increases fluid-induced hemodilution, the magnitude of which can be expressed as an acute reduction of the distribution rate constant for infused fluid. The post-induction value of this parameter was closely associated with MAP but not with the patient's age.
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| 4. |
- Naudet, Y., et al.
(författare)
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Describing interoperability : The OoI ontology
- 2006
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Ingår i: CEUR Workshop Proc..
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Konferensbidrag (refereegranskat)abstract
- Though ontologies are widely used to solve some specific interoperability problems, there is no specific ontology defining what interoperability actually is, independently from any domain. In this paper, we propose and discuss a first version of such an ontology, namely the OoI (Ontology of Interoperability), which we formalized using the Ontology Web Language (OWL). On the basis of previous research efforts having lead to UML formalization of our model of Interoperability, we use this paper for presenting the OWL version and for linking and comparing it with other models dealing with Interoperability: maturity models for interoperability like e.g. the Levels of Information System Interoperability (LISI) model, and the Model Morphisms ontology (MoMo), which deals with interoperability of models. Finally, we illustrate in a brief use case how the OoI could be used with MoMo to provide solutions to interoperability problems between two models.
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| 5. |
- Wang, J. H., et al.
(författare)
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Pulmonary edema in the transurethral resection syndrome induced with mannitol 5%
- 2009
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley-Blackwell. - 0001-5172 .- 1399-6576. ; 53:8, s. 1094-1096
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Tidskriftsartikel (refereegranskat)abstract
- Two patients developed the transurethral resection (TUR) syndrome after having absorbed mannitol 5% during TUR of the prostate. Both developed pulmonary edema and became severely hypoatremic (lowest serum sodium 99 and 97 mmol/l, respectively). Hypertonic saline was infused to raise the serum sodium level and plasma volume expansion used to combat hypotension. One patient also required positive-pressure ventilation and intravenous administration of norepinephrine. Both patients recovered completely.
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