Tag: Population

Updated pediatric liver size ranges on ultrasound
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in Radiology
What the study found The study found updated reference ranges for pediatric liver size on ultrasound, based on age and height. The authors report that the normal liver size range is slightly higher than previously reported. Why the authors say this matters The authors say the work matters because liver size assessment is a basic…
Authors link low fertility to changing mating and bonding patterns
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in Gender studies
What the study found After the 1960s, the authors describe a new mating regime spreading across parts of the world, marked by female emancipation, individual mate choice, and effective birth control. They report continuing rises in singlehood and declining fertility. What the authors say this matters The authors argue that many men's usefulness to "free…
Hebbian learning can shift activity spreading in opposite directions
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in Engineering
What the study found Hebbian learning, meaning reinforcement of a connection after successful activation, can produce opposite global effects from local changes. The authors report that positive reinforcement tends to eliminate the active phase, while negative reinforcement can turn an inactive phase into a globally active one. Why the authors say this matters The study…
Authors propose broader view of climate change drivers
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in Energy
Framework proposing anthropogenic power generation and energy balance as factors in climate change, with industrial efficiency improvements as mitigation strategy
Bury genomes show a population turnover in the Paris Basin
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in Archaeology
Genetic analysis of 132 ancient genomes from Paris Basin reveals population discontinuity during Neolithic decline, with disease and environmental change driving northward ancestry shift around.
Harvest levels may prevent red fox growth, but not decline
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in Ecology
Integrated population modeling of red foxes shows harvest alone cannot suppress populations when compensatory immigration buffers mortality, with implications for mesopredator management.
Urbanisation amplifies climate-driven butterfly declines in Europe
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in Ecology
Urban and rural butterfly populations respond differently to climate warming and aridification, with urbanisation amplifying negative climate impacts through reduced habitat connectivity.
Long-nosed potoroo faces different conservation statuses across landscapes
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in Ecology
Long-nosed potoroo conservation varies by landscape in Victoria, facing threats from invasive predators, fire, and climate change. Strategic management combining habitat protection and predator.
Sleep health improved unevenly after the pandemic
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in Psychology
Post-pandemic sleep health improved unevenly, with behavioral measures recovering faster than subjective satisfaction. Material deprivation strongly predicted slower improvement trajectories.
Improved black-winged kite algorithm outperformed comparison methods
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in Algorithm
Improved black-winged kite optimization algorithm combining multiple strategies to prevent local optima and enhance convergence, with application to predictive modeling.