In a finite-size Abelian sandpile model, extreme avalanches are repelling each other. Taking a time series of the avalanche size and using a decision variable derived from that, we predict the occurrence of a particularly large avalanche in the next time step. The larger the magnitude of these target avalanches, the better is their predictability. The predictability which is based on a finite-size effect, is discussed as a function of the system size.
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http://dx.doi.org/10.1103/PhysRevE.80.026124 | DOI Listing |
Nat Commun
January 2025
Centro de Astrobiologia (CAB), INTA-CSIC, Torrejón de Ardoz, Madrid, Spain.
Microorganisms are present in snow/ice of the Antarctic Plateau, but their biogeography and metabolic state under extreme local conditions are poorly understood. Here, we show the diversity and distribution of microorganisms in air (1.5 m height) and snow/ice down to 4 m depth at three distant latitudes along a 2578 km transect on the East Antarctic Plateau on board an environmentally friendly, mobile platform.
View Article and Find Full Text PDFAIMS Neurosci
December 2024
Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy.
Personality can be considered a system characterized by complex dynamics that are extremely adaptive depending on continuous interactions with the environment and situations. The present preliminary study explores the dynamic interplay between brain flexibility and personality by taking the dynamic approach to personality into account, thereby drawing from Cloninger's psychobiological model. 46 healthy individuals were recruited, and their brain dynamics were assessed using magnetoencephalography (MEG) during the resting state.
View Article and Find Full Text PDFNat Commun
December 2024
WSL Institute for Snow and Avalanche Research SLF, Davos Dorf, Switzerland.
Mountain permafrost, constituting 30% of the global permafrost area, is sensitive to climate change and strongly impacts mountain ecosystems and communities. This study examines 21st century permafrost warming in European mountains using decadal ground temperature data from sixty-four boreholes in the Alps, Scandinavia, Iceland, Sierra Nevada and Svalbard. During 2013-2022, warming rates at 10 metres depth exceed 1 °C dec in cases, generally surpassing previous estimates because of accelerated warming and the use of a comprehensive data set.
View Article and Find Full Text PDFThis study presents a framework for classifying a wooden mannequin's poses using a single-photon avalanche diode (SPAD) array in dynamic and heterogeneous fog conditions. The target and fog generator are situated within an enclosed fog chamber. Training datasets are continuously collected by configuring the temporal and spatial resolutions on the sensor's firmware, utilizing a low-cost SPAD array sensor priced below 5, consisting of an embedded SPAD array and diffused VCSEL laser.
View Article and Find Full Text PDFNature
November 2024
Institute for Atmospheric and Climate Science, ETH Zürich, Zurich, Switzerland.
The observed temperature record, which combines sea surface temperatures with near-surface air temperatures over land, is crucial for understanding climate variability and change. However, early records of global mean surface temperature are uncertain owing to changes in measurement technology and practice, partial documentation, and incomplete spatial coverage. Here we show that existing estimates of ocean temperatures in the early twentieth century (1900-1930) are too cold, based on independent statistical reconstructions of the global mean surface temperature from either ocean or land data.
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