Results 191 to 200 of about 90,354 (334)

A multi-dimensional incomplete stepped-wedge trial design to estimate the impact of standards-based audit. [PDF]

PLoS One, 2023
White SA, Mgawadere F.
europepmc   +1 more source

Advancing Research on Biomaterials and Biological Materials with Scanning Electron Microscopy under Environmental and Low Vacuum Conditions

Advanced Engineering Materials, EarlyView.
Herein, environmental scanning electron microscopy (ESEM) is discussed as a powerful extension of conventional SEM for life sciences. By combining high‐resolution imaging with variable pressure and humidity, ESEM allows the analysis of untreated biological materials, supports in situ monitoring of hydration‐driven changes, and advances the functional ...
Jendrian Riedel, Lea Dierker, Antoine Eyram Kwame, Kim Nora Wagner, Jonas J. Unterholzner, Jan‐Henning Dirks, Dorothea Brüggemann   +6 more
wiley   +1 more source

Multimodal Mechanical Testing of Additively Manufactured Ti6Al4V Lattice Structures: Compression, Bending, and Fatigue

Advanced Engineering Materials, EarlyView.
In this experimental study, the mechanical properties of additively manufactured Ti‐6Al‐4V lattice structures of different geometries are characterized using compression, four point bending and fatigue testing. While TPMS designs show superior fatigue resistance, SplitP and Honeycomb lattice structures combine high stiffness and strength. The resulting
Klaus Burkart, Jonas Schmidt, Anastasiya Toenjes, Johanna Eisenträger   +3 more
wiley   +1 more source

Laser Metal Deposition of Aluminum Alloys 7075 and 5083 with the Addition of Volatile Alloying Elements through Powder Blending

Advanced Engineering Materials, EarlyView.
This study investigates laser metal deposition of aluminum alloys EN AW‐7075 and EN AW‐5083, using powder blending to compensate zinc and magnesium evaporation. In situ alloying and ex situ alloying with ZnAl12 and AZ91 preserve near‐standard compositions and improve mechanical properties.
Finn Bendixen, Anastasiya Toenjes, Annika Bohlen, Thomas Seefeld   +3 more
wiley   +1 more source

Effectiveness of Chinese herbal medicine on improving sleep and mental health in adults: Study protocol for a stepped-wedge cluster randomized trial [version 2; peer review: 2 approved]

F1000Research
Background Depression, anxiety, and insomnia significantly impact global health and impose substantial health burdens worldwide. Conventional treatments including pharmacotherapy and psychotherapy face limitations in efficacy, side effects, and ...
Rachel Ngan Yin Chan, Lixiang Zhai, Qin Liu, Jialing Zhang, Zhaoxiang Bian, Junjun Yang, Danny J. Yu, Albert Yeung, Chun Hoi Cheung, Hoi Ki Wong, Francesco Recchia, Jingyuan Luo, Wing Fai Yeung, Hiu To Tang, Shirley Xin Li, Yun Kwok Wing   +15 more
doaj   +1 more source

Manufacturing Continuous Fiber‐Reinforced Printing Filaments: Development of a Post‐Consolidation Unit

Advanced Engineering Materials, EarlyView.
A novel, temperature‐controlled post‐consolidation unit is developed to test its potential to improve the melt impregnation process used to manufacture continuous fiber‐reinforced filaments for additive manufacturing of high‐performance thermoplastics.
Daniel Beermann, Patrick Schiebel, David May   +2 more
wiley   +1 more source

Rheocasting versus Die Casting: An Insight into the Low‐Cycle Fatigue Behavior of AlSi7Mg0.6

Advanced Engineering Materials, EarlyView.
The study compares rheocast lightweight components with high‐pressure die cast materials regarding microstructure and fatigue behavior. Rheocast process offers higher efficiency due to lower casting temperatures. Despite some microstructural differences, both processes show similar strengths (yield strength 125 MPa, tensile strength 240 MPa).
Julia Richter, Thomas Wegener, Andreas Schilling, Martin Fehlbier, Thomas Niendorf   +4 more
wiley   +1 more source

Facilitation of team-based care to improve HTN management and outcomes: a protocol for a randomized stepped wedge trial. [PDF]

BMC Health Serv Res, 2023
Shelley DR, Brown D, Cleland CM, Pham-Singer H, Zein D, Chang JE, Wu WY.   +6 more
europepmc   +1 more source

On Anticipation Effect in Stepped Wedge Cluster Randomized Trials

In stepped wedge cluster randomized trials (SW-CRTs), the intervention is rolled out to clusters over multiple periods. A standard approach for analyzing SW-CRTs utilizes the linear mixed model, where the treatment effect is only present after the treatment adoption, under the assumption of no anticipation. This assumption, however, may not always hold
Wang, Hao, Chen, Xinyuan, Courtright, Katherine R., Halpern, Scott D., Harhay, Michael O., Taljaard, Monica, Li, Fan   +6 more
openaire   +2 more sources

A Bayesian adaptive design approach for stepped-wedge cluster randomized trials

Clinical Trials
Background: The Bayesian group sequential design has been applied widely in clinical studies, especially in Phase II and III studies. It allows early termination based on accumulating interim data. However, to date, there lacks development in its application to stepped-wedge cluster randomized trials, which are gaining popularity in pragmatic trials ...
Jijia Wang, Jing Cao, Chul Ahn, Song Zhang   +3 more
openaire   +2 more sources