Results 81 to 90 of about 4,754,770 (321)
Experimental Analysis and Physics‐Based Analytical Model on Twisted and Coiled Artificial Muscles
Advanced Engineering Materials, EarlyView.Twisted and coiled artificial muscles made from silver‐coated nylon fibers are investigated through experiments and analytical modeling. The actuators achieve contractions up to 19.3% and specific work of 8 kJ kg−1, though efficiency remains limited (≈0.15%) by thermal losses.
Salvatore Garofalo +3 more
wiley +1 more source
Frontiers in PsychologyIntroductionA substantial body of research has demonstrated the negative repercussions of the COVID-19 pandemic on university students’ mental health and well-being.
Jannika Haase, Lysann Zander
doaj +1 more source
A Positron Lifetime Study of Cooling and Natural Aging of Solutionized Aluminum Alloys
Advanced Engineering Materials, EarlyView.The process during cooling of Al–Mg and Al–Mg–Si alloys from the solutionizing temperature down to 20 °C is interrupted. These states are analyzed with positron lifetime spectroscopy to trace the processes during cooling. In different temperature ranges, two stages of vacancy loss and solute clustering are identified.
Zi Yang, Mengjie Li, John Banhart
wiley +1 more source
Enabling Decision Making with the Modified Causal Forest: Policy Trees for Treatment Assignment
AlgorithmsDecision making plays a pivotal role in shaping outcomes across various disciplines, such as medicine, economics, and business. This paper provides practitioners with guidance on implementing a decision tree designed to optimise treatment assignment ...
Hugo Bodory +2 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.This article provides an overview of recent advancements in bulk processing of rare‐earth‐free hard magnetic materials. It also addresses related simulation approaches at different scales. The research on rare‐earth‐free magnetic materials has increased significantly in recent years, driven by supply chain issues, environmental and social concerns, and
Daniel Scheiber, Andrea Bachmaier
wiley +1 more source
The role of parents’ beliefs regarding their children’s literacy acquisition
Frontiers in EducationEarly literacy acquisition is influenced by children’s social and cultural background. Several empirical studies have shown that by considering literacy activities at home and providing cultural resources, the correlation between the social and cultural ...
Anna Ratka-Pauler +2 more
doaj +1 more source
Vitamin D content in fortified low fat milk in Saudi Arabia
Annals of Saudi Medicine, 2016 BACKGROUND: Vitamin D deficiency is common in many countries, including Saudi Arabia. Various population-level preventive measures have been implemented, including milk fortification with vitamin D.
Syed N. Alvi +3 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.Curvature‐tuned auxetic lattices are designed, fabricated, and mechanically characterized to reveal how geometric curvature governs stretchability, stress redistribution, and Poisson's ratio evolution. Photoelastic experiments visualize stress pathways, while hyperelastic simulations quantify deformation mechanics.
Shuvodeep De +3 more
wiley +1 more source
Partisan Campaigning and Initiative Petition Signing in Direct Democracies
Swiss Journal of Economics and Statistics, 2017 Summary This paper investigates whether popular initiatives signed by a larger share of the population have higher acceptance rates at the subsequent vote.
Katharina E. Hofer
doaj +1 more source