2,285 research outputs found
Recurrence risk and prediction of a delivery under 34 weeks of gestation after a history of a severe hypertensive disorder
No full textObjective: The aim of this study was to report outcomes of the subsequent pregnancy after early-onset pre-eclampsia in a first pregnancy (index), and to evaluate the potential risk factors for recurrence of pre-eclampsia and preterm delivery. Design: We performed a retrospective cohort study of all women who developed early-onset pre-eclampsia (delivery before 34 weeks of gestation) in their first pregnancy between January 1996 and December 2004 in two perinatal centres with regional function. All patients were included consecutively. Information was retrieved on the course of subsequent pregnancies. Setting: Two tertiair centres with regional function. Population: Women with a delivery under 34 weeks due to a hypertensive disorder (N = 380). Main outcome measures: We determined the absolute risk of recurrence of an adverse outcome, defined as a hypertensive complication resulting in delivery before 34 weeks of gestation. The available clinical parameters were evaluated as predictors for recurrence using logistic regression analysis. Results: We identified 380 patients, of whom 46 were lost to follow-up. In total, 123 patients refrained from subsequent pregnancy (79 [64%] from fear of recurrence). Of the 211 patients with a subsequent pregnancy, 36 (17%, 95% CI 12–22%) had a recurrent delivery before 34 weeks of gestation, 30 (14%, 95% CI 9.5–19%) delivered between 34 and 37 weeks of gestation, and 145 (69%, 95% CI 62–75%) delivered later than 37 weeks of gestation. Of this last group, only 67 (32%, 95% CI 25–38%) pregnancies were completely uneventful. Chronic hypertension, maximum diastolic blood pressure, caesarean delivery and level of 24-h proteinuria were independent predictors for an adverse pregnancy outcome. Conclusions: Women that had early severe pre-eclampsia in their first pregnancy have a 17% risk of recurrence, with a delivery before 34 weeks of gestation. Only 32% had a completely uneventful pregnancy.J Langenveld, A Buttinger, J van der Post, H Wolf, BW Mol and W Ganzevoor
A study of alternatives for VSTOL computer systems
No full textfrom Richard W. Hamming collection (NPS-018), Naval Postgraduate School. Papers and Speeches.This study assesses the impact of Large Scale Integration on future airborne digital systems, with a focus on the VSTOL systems. The study addresses the design, implementation, testing, servicing and the associated life cycle costs of airborne digital computer systems, both the hardware and the programs necessary for successful operation of the system. The scope of the study is limited to the computer system, not the sensors, keyboards, displays and other peripheral equipment. The study provides: information for decision making on the future course of action, a design philosophy, a process analysis methodology, and a life cycle cost analysis method.Approved for public release; distribution is unlimited.supported in part by the
Naval Weapons Center under the project number 77 WR30155http://archive.org/details/studyofalternati00kod
Overview of ATLAS Standard Model Measurements
No full textThe precise measurement of known Standard Model processes is an important part of the ATLAS physics programme. A wide spectrum of final states is covered ranging from the measurement of the total proton-proton cross section down to very rare processes like the production of same-sign W pairs. These measurements serve to constrain phenomenological models of the strong interaction, provide precision tests of perturbative QCD calculations up to the next-to-next-to-leading order, improve our knowledge on the proton structure, measure fundamental Standard Model parameters to high precision or test the Electroweak gauge structure, providing model-independent constraints on new physics. Recent highlights of Run-1 measurements are reported, including new results on multi-differential jet and photon production, precision measurements with single W and Z bosons and multiboson production. The ATLAS Standard model group is also committed to perform several measurements with the data collected in the early Run 2 of the LHC with pp collisions at 13 TeV. Several of those are expected to be available at the time of the conference, including measurements of the properties of minimum bias interactions, the total inelastic cross section and well as early cross section measurements involving W and Z bosons, jets and isolated photons
The ATLAS Level-1 Trigger System
No full textThe ATLAS Level-1 Trigger is the first stage of event selection for the ATLAS experiment at the LHC. In order to identify the interesting collisions events to be passed on to the next selection stage within a latency of less than 2.5 us, it is based on custom-built electronics. Signals from the Calorimeter and Muon Trigger System are combined in the Central Trigger Processor which processes the overall L1 Accept (L1A) decision. The Level-1 Trigger identifies event features such as missing transverse energy, candidate electrons, photons, jets and muons. This poster presents how the Level-1 Trigger System has performed with increasing LHC luminosity and discusses problems encountered during operations. It also gives an overview of the challenges and plans with respect to the increasingly demanding LHC running conditions
ATLAS Measurements of Vector Boson and Diboson Production
No full textPresentation of ATLAS 2012 Analyses in the field of boson and diboson measurements
Search for triboson production in collisions at TeV with the ATLAS detector
No full textSee paper for full list of authors - Comments: 39 pages in total, author list starting page 23, 5 figures, 7 tables, submitted to European Physics Journal C, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2015-07/International audienceThis paper reports a search for triboson production in two decay channels ( and with ) in proton-proton collision data corresponding to an integrated luminosity of 20.3 fb at a centre-of-mass energy of 8 TeV with the ATLAS detector at the Large Hadron Collider. Events with exactly three charged leptons, or two leptons with the same electric charge in association with two jets, are selected. The total number of events observed in data is consistent with the Standard Model (SM) predictions. The observed 95 % confidence level upper limit on the SM production cross section is found to be 730 fb with an expected limit of 560 fb in the absence of SM production. Limits are also set on anomalous quartic gauge couplings
Evidence for Electroweak Production of W(+/-)W(+/-)jj in pp Collisions at root s=8 TeV with the ATLAS Detector
No full textFurther distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.This Letter presents the first study of W±W±jj, same-electric-charge diboson production in association with two jets, using 20.3 fb-1 of proton-proton collision data at √s=8 TeV recorded by the ATLAS detector at the Large Hadron Collider. Events with two reconstructed same-charge leptons (e±e±, e±μ±, and μ±μ±) and two or more jets are analyzed. Production cross sections are measured in two fiducial regions, with different sensitivities to the electroweak and strong production mechanisms. First evidence for W±W±jj production and electroweak-only W±W±jj production is observed with a significance of 4.5 and 3.6 standard deviations, respectively. The measured production cross sections are in agreement with standard model predictions. Limits at 95% confidence level are set on anomalous quartic gauge couplings
Time series analysis as a technique for analyzing the policy implications of the expenditure phase of the defense budget.
No full textThis thesis describes, in general overview terms, the budget execution process from the time the appropriations bill becomes law until the disbursement of funds to the private sector emphasizing the roles played by all the elements which make up the execution process. The Department of Defense budget execution process is then analyzed based on incurred obligation and expenditure patterns using time series analysis techniques. Results of the analysis are displayed graphically and the policy implications are discussed. Areas for further analysis are suggested.Captain, United States Armyhttp://archive.org/details/timeseriesnalysi109451831
Measurement of vector-boson scattering and limits on anomalous quartic gauge couplings with the ATLAS detector
No full textSee paper for full list of authors - 49 pages in total, author list starting page 33, 13 figures, 12 tables, submitted to Physical Review D, all figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2014-05/International audienceThis paper presents the extended results of measurements of W±W±jj production and limits on anomalous quartic gauge couplings using 20.3 fb−1 of proton-proton collision data at s√=8 TeV recorded by the ATLAS detector at the Large Hadron Collider. Events with two leptons (e or μ) with the same electric charge and at least two jets are analyzed. Production cross-sections are determined in two fiducial regions, with different sensitivities to the electroweak and strong production mechanisms. An additional fiducial region, particularly sensitive to anomalous quartic gauge coupling parameters α4 and α5, is introduced, which allows more stringent limits on these parameters compared to the previous ATLAS measurement
Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at √<span style="text-decoration:overline">s</span>=7 TeV with the ATLAS experiment
No full textContains fulltext :
93952.pdf (Publisher’s version ) (Open Access
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