Results 261 to 270 of about 29,380 (303)

Endothelial Cells Angiogenesis in Sulfated Glycosaminoglycan (GAG) Hydrogels Enhanced by Bioactive Glass‐Released Ions

Advanced Functional Materials, EarlyView.
A mechanically tunable hydrogel composed of gelatin, chondroitin sulfate and laminin promotes angiogenesis in vitro without the supplement of growth factors. Endothelial cells morphogenesis was further enhanced by medium conditioned with bioactive glass 58S‐released ions (Ca and Si), thus offering a promising strategy to vascularize 3D tissue ...
Marco Piazzoni, Ilaria Borghi, Francesca Cadamuro, Sophia Dalfino, Riccardo Campanile, Sofia Nizzolo, Valeria Cassina, Francesca Tallia, Julian R. Jones, Francesco Mantegazza, Sabrina Bertini, Lorenzo Moroni, Francesco Nicotra, Laura Russo   +13 more
wiley   +1 more source

From Waste to Value: Conversion of Calcium Sulfate to Vaterite via Carbon Capture and Storage

Advanced Functional Materials, EarlyView.
This study introduces a new concept for carbon management that relies on the carbonation of industrial gypsum waste and yields phase‐pure vaterite at ambient conditions without any additives. The obtained vaterite is further shown to be a reactive material that develops compressive strength in aqueous suspensions like conventional cements.
Carlos Pimentel, German Montes‐Hernández, Pablo Almarza‐Cifuentes, Matthias Kellermeier, Alexander E.S. Van Driessche   +4 more
wiley   +1 more source

Melt Grafting of Geometry‐Tailored Voltage Stabilizers for High‐Performance Polypropylene Insulation

Advanced Functional Materials, EarlyView.
A scalable one‐step melt grafting strategy is developed to enhance the dielectric properties of isotactic polypropylene by covalently incorporating thermally stable aromatic voltage stabilizers. This solvent‐free approach improves volume resistivity and DC breakdown strength through deep trap formation and charge localization, offering a sustainable ...
Nazirul Mubin bin Normansah, Taehoon Kwon, Hana Kim, Shin‐Ki Hong, Seung Won Lee, Se Hee Lee, Ik‐Su Kwon, Masahiro Kozako, Minhee Kim, Seunggun Yu   +9 more
wiley   +1 more source

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Stepped Wedge Cluster Randomized Trials: A Methodological Overview

World Neurosurgery, 2022
Stepped wedge cluster randomized trials enable rigorous evaluations of health intervention programs in pragmatic settings. In the present study, we aimed to update neurosurgeon scientists on the design of stepped wedge randomized trials.We have presented an overview of recent methodological developments for stepped wedge designs and included an update ...
Fan Li, Rui Wang
openaire   +2 more sources

Power analysis for stepped wedge trials with multiple interventions

Statistics in Medicine, 2022
Stepped wedge design (SWD) trials are cluster randomized trials that feature staggered, unidirectional cross‐over between treatment conditions. Existing literature on power for SWDs focuses primarily on designs with two conditions, typically a control and an intervention condition. However, SWDs with more than one treatment condition are being proposed
Phillip Sundin, Catherine M. Crespi
openaire   +2 more sources

Variance formulae for multiphase stepped wedge cluster randomized trial

Statistics in Medicine, 2020
AbstractIn a multiphase stepped wedge cluster randomized trial (MSW‐CRT), more than one intervention will be initiated on each sequence in a fixed order. Hence, with the MSW‐CRT design, the effect of the first intervention can be evaluated when compared to control, as well as the added‐on effects of the subsequent interventions.
Pengyue Zhang, Abigail Shoben, Rebecca Jackson, Soledad Fernandez   +3 more
openaire   +3 more sources

Design and analysis of stepped wedge cluster randomized trials

Contemporary Clinical Trials, 2007
Cluster randomized trials (CRT) are often used to evaluate therapies or interventions in situations where individual randomization is not possible or not desirable for logistic, financial or ethical reasons. While a significant and rapidly growing body of literature exists on CRTs utilizing a "parallel" design (i.e.
Michael A, Hussey, James P, Hughes
openaire   +2 more sources

Information Content of Cluster–Period Cells in Stepped Wedge Trials

Biometrics, 2018
Summary Stepped wedge and other multiple-period cluster randomized trials, which collect data from multiple clusters across multiple time periods, are being conducted with increasing frequency; statistical research into these designs has not kept apace.
Jessica Kasza, Andrew B. Forbes
openaire   +3 more sources

Analysis of Data from a Stepped Wedge Trial

2021
In this chapter the different methods for the analysis of data from a stepped wedge trial are discussed. These methods contain the comparison of different arms, the comparison of groups with a different number of intervention measurement, and the comparison of transitions.
openaire   +1 more source

Stepped wedge clinical trial

TVZ - Verpleegkunde in praktijk en wetenschap, 2021
Janneke de Man-Van Ginkel, Roelof Ettema
openaire   +1 more source