This paper proposes the use of a hybrid method that combines Biased Random Key Genetic Algorithm (BRKGA) with a local search heuristic to separate Brazilian tailing dam data into groups. The goal was identifying dams similar to Fundão and B1 failed dams. The groups were created by solving the clustering problem by BRKGA. The clustering problem consists in separating a set of objects into groups such that members of each group are similar to each other. The data was composed by 427 dams, with the actual 425 dams of Brazilian Register of Tailing Dams and the two Brazilian failed dams from the last years. Computational experiments considering real data available are presented to demonstrate the efficacy of the proposed method producing feasible solutions. Thus, it is expected that the good results can be applied in the identification of tailings dams with risk potentials, assisting in the identification of these dams.
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http://dx.doi.org/10.1590/0001-3765202120201242 | DOI Listing |
J Fish Biol
March 2025
Scottish Centre for Ecology and the Natural Environment, SBOHVM, University of Glasgow, Glasgow, UK.
For migratory species, successful navigation is critical to fitness. In Atlantic salmon, for example, there is evidence that during migration from natal streams to the sea, passage through waters with poorly defined or mixed water velocity patterns may constrain directional navigation, causing individuals to become trapped or delayed in lakes or other bodies with slowly flowing water. In this study, we determined the minimum water velocities needed to elicit a behavioural response, in this case a change in the direction of holding position, in both wild origin and domesticated salmon smolts.
View Article and Find Full Text PDFSci Rep
March 2025
Nanjing Hydraulic Research Institute, Nanjing, 210029, Jiangsu, China.
Concrete dam structures respond to various influencing factors with complex nonlinear characteristics and notable time lags. Deformation serves as a crucial monitoring metric, providing a direct indication of the structural response of these dams. An effective deformation analysis and prediction model is essential for accurately assessing the health of concrete dam structures.
View Article and Find Full Text PDFPrenatal alcohol exposure (PAE) can lead to a wide spectrum of deficits in growth and neurological function, and there is an established link between PAE and auditory dysfunction. However, the effects of PAE on auditory development are complex and vary depending on the age and pattern of alcohol exposure. In this study, we developed a mouse model of PAE during the first half of the gestational period, mimicking alcohol consumption during the first trimester of pregnancy in humans.
View Article and Find Full Text PDFBiochem Biophys Res Commun
March 2025
International Education and Research Center for Food and Agricultural Immunology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan; Laboratory of Animal Functional Morphology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan; Graduate Program in Food Science, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan; Laboratory of Animal Mucosal Immunology, Graduate School of Agricultural Science, Tohoku University, Miyagi, 980-8572, Japan; Division of Mucosal Vaccines, International Vaccine Design Center, The Institute of Medical Science, The University of Tokyo, Tokyo, 108-8639, Japan; Department of Animal Bioscience, University of Guelph, Ontario, N1G 2W1, Canada; Center for Professional Development, Institute for Excellence in Higher Education, Tohoku University, Miyagi, 980-8576, Japan. Electronic address:
The development and maintenance of a balanced microbiota is crucial for human health. Milk contains immune factors that not only protect offspring from infectious diseases but also play an important role in promoting the development and maintenance of the microbiota. However, the persisting effects of milk-derived immune factors on the maintenance of the microbiota after weaning have not been carefully examined.
View Article and Find Full Text PDFJ Mol Endocrinol
March 2025
L Huang, Department of Nutrition, University of California at Davis, Davis, United States.
Somatostatin (Sst) is an inhibitory regulator of many hormones. The prenatal environment impacts offspring's risk to type 2 diabetes in adulthood. However, the effect of maternal Sst deficiency on glucose and insulin metabolism in offspring and metabolic disease risk in their adult life have been poorly understood.
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