Now showing items 11-20 of 67
Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE
Though tree-ring chronologies are annually resolved, their dating has never been independently validated at the global scale. Moreover, it is unknown if atmospheric radiocarbon enrichment events of cosmogenic origin leave ...
Multipopulation Genetic Algorithm for Determining Crystal Structures Using Powder Diffraction Data
A method for the automatic determination of crystal structures using powder diffraction data by the multipopulation genetic algorithm is proposed. The advantage of using coevolution with exchange by better individuals over ...
Biosorbents based on pine sawdust and malt sprouts for preconcentration and ICP-OES determination of nonferrous, heavy, and precious metals in the environmental samples
Pine sawdust and malt sprouts modified with orthophosphoric acid and carbamide have been proposed for solid-phase extraction (SPE) of nonferrous, heavy, and precious metals and their subsequent determination in the ...
TIMING OF CELL PRODUCTION IN TREE RINGS: AN AUTOMATIC TWO-STEP PROCEDURE IN R
The study of intra-annual dynamic of wood formation is one of the most progressive and fast-growing fields in plant sciences. The main anatomical characteristics of tree-ring structure, e.g. number of cells and radial cell ...
Application of GA package in functional packaging
The approach to application program for the task of configuration of the elements of the commutation circuit for design of the radio-electronic equipment on the basis of the genetic algorithm is offered. The efficiency of ...
Experimental study of pressure pulsations in the flow duct of a medium-size model hydroelectric generator with Francis turbine
In the present study, we report on the results of an experimental study of pressure pulsations in the flow duct of a medium-scale hydrodynamic bench with Francis turbine. In various regimes, integral and pulsation ...