11 research outputs found
Kennismanagement in Delft Cluster: Een stand van zaken op basis van Delft Cluster's KnowME. Resultaten nul-meting februari 2001. Achtergrondrapport
No full textFlow and cavitation in inducers
No full textIn order to gain more insight in the cavitation in inducers, many video films and high speed movies have been studied, in parallel with a bibliographic research. The research was carried out at the "Université Joseph Fourier" in Grenoble, France. All basic types of cavitation in inducers are listed and illustrated with photographs. To really understand the cavitation, i t is necessary to focus on the flow in inducers. The discussion aims first of all at a qualitative understanding of the flow. In addition to a discussion of the 3D flow effects and their explanations reported in the literature, some new interpretations are suggested: - The displacement flow has significant impact on the total flow field in inducers. - The recirculation in the discharge flow is explained by the decay of the swirl in downstream direction. - The inlet recirculation originates from the blockage and the deflection of the inlet flow in the endwall region and from the swirl decay of the reverse flow in upstream direction.Kramers Laboratorium voor Fysische TechnologieApplied Science
Measurement of laminar, transitional and turbulent pipe flow using Stereoscopic-PIV
No full textApplied Science
Turbulence regeneration in pipe flow at moderate reynolds numbers
No full textWe present the results of an experimental investigation into the nature and structure of turbulent pipe flow at moderate Reynolds numbers. A turbulence regeneration mechanism is identified which sustains a symmetric traveling wave within the flow. The periodicity of the mechanism allows comparison to the wavelength of numerically observed exact traveling wave solutions and close agreement is found. The advection speed of the upstream turbulence laminar interface in the experimental flow is observed to form a lower bound on the phase velocities of the exact traveling wave solutions. Overall our observations suggest that the dynamics of the turbulent flow at moderate Reynolds numbers are governed by unstable nonlinear traveling waves. © 2005 The American Physical Society
Evaluating the Ecological Impacts of Cultivating Genetically Modified Herbicide Tolerant (GMHT) Oilseed Rape and Maize: (2007-B-DS-1-S1) STRIVE Report
No full textThis report is published as part of the Science, Technology, Research and Innovation for the
Environment (STRIVE) Programme 2007–2013.Author has checked copyrigh
Arabic printing in Malta 1825-1845 : Its history and its place in the development of print culture in the Arab Middle East.
No full textSIGLEAvailable from British Library Document Supply Centre- DSC:D174840 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
Clinical triage of patients on kidney replacement therapy presenting with COVID-19: An ERACODA registry analysis
No full textBackground: Patients on kidney replacement therapy (KRT) are at very high risk of coronavirus disease 2019 (COVID-19). The triage pathway for KRT patients presenting to hospitals with varying severity of COVID-19 illness remains ill-defined. We studied the clinical characteristics of patients at initial and subsequent hospital presentations and the impact on patient outcomes. Methods: The European Renal Association COVID-19 Database (ERACODA) was analysed for clinical and laboratory features of 1423 KRT patients with COVID-19 either hospitalized or non-hospitalized at initial triage and those re-presenting a second time. Predictors of outcomes (hospitalization, 28-day mortality) were then determined for all those not hospitalized at initial triage. Results: Among 1423 KRT patients with COVID-19 [haemodialysis (HD), n = 1017; transplant, n = 406), 25% (n = 355) were not hospitalized at first presentation due to mild illness (30% HD, 13% transplant). Of the non-hospitalized patients, only 10% (n = 36) re-presented a second time, with a 5-day median interval between the two presentations (interquartile range 2-7 days). Patients who re-presented had worsening respiratory symptoms, a decrease in oxygen saturation (97% versus 90%) and an increase in C-reactive protein (26 versus 73 mg/L) and were older (72 vs 63 years) compared with those who did not return a second time. The 28-day mortality between early admission (at first presentation) and deferred admission (at second presentation) was not significantly different (29% versus 25%; P = 0.6). Older age, prior smoking history, higher clinical frailty score and self-reported shortness of breath at first presentation were identified as risk predictors of mortality when re-presenting after discharge at initial triage. Conclusions: This study provides evidence that KRT patients with COVID-19 and mild illness can be managed effectively with supported outpatient care and with vigilance of respiratory symptoms, especially in those with risk factors for poor outcomes. Our findings support a risk-stratified clinical approach to admissions and discharges of KRT patients presenting with COVID-19 to aid clinical triage and optimize resource utilization during the ongoing pandemic. © 2021 The Author(s) 2021. Published by Oxford University Press on behalf of ERA-EDTA. All rights reserved
