359 research outputs found
A re-evaluation of the nuclear structure function ratios for D, He, 6Li, C and Ca
No full textWe present a re-evaluation of the structure function ratios F-2(He)/F-2(D), F-2(C)/F-2(D) and F-2(Ca)/F-2(D) measured in deep inelastic muon-nucleus scattering at an incident muon momentum of 200 GeV. We also present the ratios F-2(C)/F-2(Li), F-2(Ca)/F-2(Li) and F-2(Ca)/F-2(C) measured at 90 GeV. The results are based on data already published by NMC; the main difference in the analysis is a correction for the masses of the deuterium targets and an improvement in the radiative corrections. The kinematic range covered is 0.0035 < x < 0.65, 0.5 < Q(2) < 90 GeV2 for the He/D, C/D and Ca/D data and 0.0085 < x < 0.6, 0.84 < Q(2) < 17 GeV2 for the Li/C/Ca ones.</p
Untersuchungen zum EMC-Effekt bei tiefinelastischer Myonenstreuung an Kohlenstoff und Zinn
No full textSIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
Proton and deuteron F<sub>2</sub> structure functions in deep inelastic muon scattering
No full textThe structure functions F2p and F2d measured by deep inelastic muon scattering at incident energies of 90 and 280 GeV are presented. These measurements cover a large kinematic range, 0.006 less-than-or-equal-to x less-than-or-equal-to 0.6 and 0.5 less-than-or-equal-to Q2 less-than-or-equal-to 55 GeV2, and include the first precise data at small x, where large scaling violations are observed. The data agree with earlier results from SLAC and BCDMS but exhibit differences with respect to those of EMC-NA2. Extrapolations to small x of recent phenomenological parton distributions are shown to disagree with the present results.</p
Untersuchungen zur Richtungsstabilität von Helium-Neon-Lasern mit Hilfe von elektronischen Messlatten
No full textAutonomous Shared Mobility & the Cities of Tomorrow: Impact of shared self-driving vehicles on the urban form of the city of Amsterdam
No full text“Anyone who only thinks of technology, has not yet recognized that autonomous driving will change our society.” says Dr. Dieter Zetsche, Chairman of Daimler AG, and indicates to what the future of mobility will look like. Autonomous and shared mobility is the most talked about topic in the world of transport today. Self-driving shared vehicles will have a huge impact on urban life as they will begin to question the distinction between private and public transportation modes. This mobility trend will help in reducing time of travel with almost 80 percent fewer cars. The reduction in the number of cars on road will lead to changes in environment, traffic, congestion issues, efficiency, cost of road building and maintaining, urban sprawl and parking. With fewer cars, vast amount of land under parking, which is observed quite often in most cities today, could be freed for other public uses, thus changing the urban form of the city as we know it. Therefore, it is time for Transport Planners and Urban Designers to concentrate on this field of development and investigate the possible impact of Autonomous mobility on the city and space to reap maximum benefits in future. This project will explore the consequences of this mobility trend through scenario based studies with a thorough analysis of the possibilities for the city of Amsterdam and speculate how this will transform the city in future.Architecture, Urbanism and Building Sciences | Complex Citie
Test of a polarized hydrogen gas target based on the storage cell technique
No full textA polarized hydrogen gas target for use in storage rings has been
developed. One application may be the production of a stored polarized
antiproton beam via spin dependent attenuation which would allow a study
of the spin-dependence of antiproton-proton interactions. In order to
increase the target thickness compared to jet targets the polarized
hydrogen atoms are injected into a T-shaped storage cell. Polarization and
density of the target have been measured in a test experiment by elastic
scattering of an α-beam from the Heidelberg MP-tandem accelerator. The
target polarization amounts to 83±8% of the maximum possible value. The
target areal density of n = (2.6±0.1±0.2) × 10 13H/cm 2 is consistent with
the density calculated from the measured H beam intensity
Accurate measurement of F-2(d)/F-2(p) and R(d)-R(p)
No full textArneodo M, Arvidson A, Badelek B, et al. Accurate measurement of F-2(d)/F-2(p) and R(d)-R(p). Nucl.Phys. B. 1997;487(1-2):3-26.Results are presented for F-2(d)/F-2(p) and R(d) - R(p) from simultaneous measurements of deep inelastic muon scattering on hydrogen and deuterium targets, at 90, 120, 200 and 280 GeV. The difference R(d) - R(p), determined in the range 0.002 0.1 the ratio decreases with Q(2)
Risk factors for long-term invasive mechanical ventilation: a longitudinal study using German health claims data
No full textAbstract
Background
Long-term invasive mechanical ventilation (IMV) is a major burden for those affected and causes high costs for the health care system. Early risk assessment is a prerequisite for the best possible support of high-risk patients during the weaning process. We aimed to identify risk factors for long-term IMV within 96 h (h) after the onset of IMV.
Methods
The analysis was based on data from one of Germany's largest statutory health insurance funds; patients who received IMV ≥ 96 h and were admitted in January 2015 at the earliest and discharged in December 2017 at the latest were analysed. OPS and ICD codes of IMV patients were considered, including the 365 days before intubation and 30 days after discharge. Long-term IMV was defined as evidence of invasive home mechanical ventilation (HMV), IMV ≥ 500 h, or readmission with (re)prolonged ventilation.
Results
In the analysis of 7758 hospitalisations, criteria for long-term IMV were met in 38.3% of cases, of which 13.9% had evidence of HMV, 73.1% received IMV ≥ 500 h and/or 40.3% were re-hospitalised with IMV. Several independent risk factors were identified (p < 0.005 each), including pre-diagnoses such as pneumothorax (OR 2.10), acute pancreatitis (OR 2.64), eating disorders (OR 1.99) or rheumatic mitral valve disease (OR 1.89). Among ICU admissions, previous dependence on an aspirator or respirator (OR 5.13), and previous tracheostomy (OR 2.17) were particularly important, while neurosurgery (OR 2.61), early tracheostomy (OR 3.97) and treatment for severe respiratory failure such as positioning treatment (OR 2.31) and extracorporeal lung support (OR 1.80) were relevant procedures in the first 96 h after intubation.
Conclusion
This comprehensive analysis of health claims has identified several risk factors for the risk of long-term ventilation. In addition to the known clinical risks, the information obtained may help to identify patients at risk at an early stage.
Trial registration
The PRiVENT study was retrospectively registered at ClinicalTrials.gov (NCT05260853). Registered at March 2, 2022.Innovation Fund of the Federal Joint CommitteeMedizinische Fakultät Heidelberg der Universität Heidelber
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