A study of one onshore wind turbine found that fatigue damage could be estimated accurately from highly compressed stress data. The best tested approach recovered 99.5% of the damage estimated from continuous high-speed measurements.
Measurements of tooth crowns differed between males and females in a study of 166 cadavers. The researchers used crown size and shape to develop discriminants that could support sex estimation when only limited dental evidence is available.
This human meta-analysis combined 24 retrospective studies involving 1,482 adult women with primary breast cancer and pathologically confirmed intramammary lymph nodes. About 32% of these nodes contained cancer, and positive intramammary nodes were associated with a higher likelihood of cancer in underarm lymph nodes. The review found that prognostic results were inconsistent and that intramammary-node status alone was not accurate enough to replace standard underarm staging.
Researchers tested a programmable hardware design that imitates selected quantum-computing ideas to run matrix calculations in parallel. In representative benchmarks, the design reached up to 6.3 times the speed and 4.1 times the energy efficiency of conventional matrix co-processors and embedded graphics processors.
For domestic workers living in social housing on the outskirts of Mexico City, travel demands, insecurity and caregiving responsibilities are closely connected. The article proposes studying access barriers as changing conditions that can reinforce or ease one another over time.
Researchers created closely alternating nickel and nickel molybdate domains less than a nanometer across. The catalyst reached 2 A per square centimetre at 1.62 volts and operated stably for more than 2,200 hours under the reported testing conditions.
Researchers developed a separator for sodium-metal batteries that releases lithium nitrate gradually during cycling. The design supported sodium–sodium cycling for more than 4,000 hours and helped full cells retain capacity through thousands of cycles.
A study estimates that China’s measured GDP may omit output linked to data that firms collect from transactions. For 2024, the estimated adjustment ranges from 0.60% to 1.60% of GDP under two different definitions of digital infrastructure.
This human randomized trial compared repeated use of a study hand-sanitizer formulation with a commercially available 79.7% ethanol sanitizer among 568 employees and cohabiting family members in Japan. The study-formulation group had fewer reported upper respiratory symptoms and illness-related work restrictions during the 72-day winter study, although the findings do not establish how well they apply to other populations or longer periods.
A systematic review and meta-analysis examined whether large changes over time in tacrolimus blood levels were associated with outcomes after kidney transplantation. Across 10 cohort studies involving 11,647 adults, higher variability was associated with a greater risk of graft loss and rejection. The findings show an association, not proof that variability causes these outcomes.
Senior executives at some of the UK's largest listed companies received higher pay after their firms used the Coronavirus Job Retention Scheme, a study finds. The increase was concentrated in chief executives' performance-related pay and did not persist into the following year.
Winter temperature inversions in Fairbanks often trapped pollution in a surface layer only 20–40 meters high, according to observations from the 2022 ALPACA experiment. The study found that pollutants remained in the layer for 1–4 hours at a time, while weak mixing and chemical reactions shaped its composition.
Different forms of DNA damage changed the shape and movement of surrounding DNA in laboratory tests. The findings suggest that these physical changes could provide an early signal that helps repair proteins locate damage, before they directly engage with it.
A study using data from the National Ecological Observatory Network found that plant invasions were associated with less stable plant communities at both local and broader ecosystem scales. The pattern was linked to losses in functional diversity and shifts toward fast-growing and more acquisitive growth and seed-dispersal strategies.
A study finds that large language models can recognize patterns in material categories but consistently struggle to use coordinate information, even as the models and datasets grow. For properties shaped mainly by crystal structure, specialized models that represent geometry performed better.
