Reden (Netherlands) Research Papers & Analytics Data

Conference Article
10.1109/estc60143.2024.10712119

Modelling the Influence of Stretched Molding Foil on the Overall Dimensions of Molded Packages

Sep 11, 2024
J.l.j Zijl + 3 more +3

In this paper, we describe a method to predict the thickness of a stretched molding foil inside a mold. Because this foil will influence the overall dimensions of packages after molding, it is necessary to predict its thickness in advance when it is deployed in the cavity. In this way, dimensional corrections of the mold in the design phase can be made to meet the tight dimensional tolerances. Furthermore, the foil is not allowed to tear during molding. To assess the change of foil-thickness and the risk to tearing, models are developed. Firstly, a simplified foil stretching model is described for calculating the foil thickness in a two-dimensional rectangular geometry. Comparisons with measurements are made to prove this model. Secondly, a three-dimensional FEM simulation with the hyper elastic Odgen model on a complex geometry is performed and compared with measurements.

Supplementary Content
2
10.48550/arxiv.2202.08763

Residual-based error estimation and adaptivity for stabilized immersed isogeometric analysis using truncated hierarchical B-splines

Feb 17, 2022
arXiv (Cornell University)
Sai C Divi + 7 more +7

We propose an adaptive mesh refinement strategy for immersed isogeometric analysis, with application to steady heat conduction and viscous flow problems. The proposed strategy is based on residual-based error estimation, which has been tailored to the immersed setting by the incorporation of appropriately scaled stabilization and boundary terms. Element-wise error indicators are elaborated for the Laplace and Stokes problems, and a THB-spline-based local mesh refinement strategy is proposed. The error estimation .and adaptivity procedure is applied to a series of benchmark problems, demonstrating the suitability of the technique for a range of smooth and non-smooth problems. The adaptivity strategy is also integrated in a scan-based analysis workflow, capable of generating reliable, error-controlled, results from scan data, without the need for extensive user interactions or interventions.

Conference Article
10.1117/12.2304129

As reliable as the sun

Nov 17, 2017
J A P Leijtens

Fortunately there is almost nothing as reliable as the sun which can consequently be utilized as a very reliable source of spacecraft power. In order to harvest this power, the solar panels have to be pointed towards the sun as accurately and reliably as possible. To this extend, sunsensors are available on almost every satellite to support vital sun-pointing capability throughout the mission, even in the deployment and save mode phases of the satellites life. Given the criticality of the application one would expect that after more than 50 years of sun sensor utilisation, such sensors would be fully matured and optimised. In actual fact though, the majority of sunsensors employed are still coarse sunsensors which have a proven extreme reliability but present major issues regarding albedo sensitivity and pointing accuracy.

Research Article
129
10.1001/archinte.165.15.1722

Improving Processes of Hospital Care During the Last Hours of Life

Aug 08, 2005
Archives of Internal Medicine
F Amos Bailey + 7 more +7

Known for excellence in care in the last days and hours of life, hospice programs can help individuals have a "good death" and lead to higher family satisfaction with quality of care. Our objective was to evaluate the effectiveness of a multicomponent palliative care intervention based on the best practices of home hospice and designed to improve the quality of care provided for patients dying in an acute care inpatient setting. This study was a before-after intervention trial conducted between 2001 and 2003. Participants included physician, nursing, and ancillary staff on inpatient services of an urban, tertiary care Veterans Affairs medical center. The palliative care intervention included staff education and support to identify patients who were actively dying and implement care plans guided by a comfort care order set template for the last days or hours of life. Data abstracted from computerized medical records of 203 veterans who died during a 6-month period before (n = 108) and after (n = 95) intervention were used to determine the impact of intervention on symptom documentation and 5 process of care indicators. There was a significant increase in the mean (SD) number of symptoms documented from 1.7 (2.1) to 4.4 (2.7) (P<.001), and the number of care plans increased from 0.4 (0.9) to 2.7 (2.3) (P<.001). Opioid medication availability increased from 57.1% to 83.2% (P<.001), and do-not-resuscitate orders increased from 61.9% to 85.1% (P<.001). There were nonsignificant changes in the proportion of deaths that occurred in intensive care units (P = .17) and in the use of nasogastric tubes (P = .40), and there was a significant increase in the use of restraints (P<.001). Our results indicate that end-of-life care improved after the introduction of the palliative care program.

Research Article
10.12681/byzsym.817

Das Bild des «anderen» im Werk von Niketas Choniates. Das Beispiel von Peter und Asen

Sep 29, 1996
BYZANTINA SYMMEIKTA
Theoni Baseu-Barabas

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