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Stiffening phenomena in annual rings of coniferous wood
Wood Science and Technology, 1984The structure of coniferous wood is characterized by pronounced differences in density between earlywood and latewood. This could result in disadvantages in wood strength especially against bending. A summary of the observations in this paper leads to the following hypothesis: Coniferous trees meet this danger by forming numerous stiffenings especially
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Radiocarbon Measurements and Annual Rings in Cave Formations
Nature, 1960THE radiocarbon method has been used to test the hypothesis that the prominent rings found in certain calcite deposits of Moaning Cave in California represent annual growth variations. Carbon-14 an alyses were made on two samples taken, from a presumably active section of travertine covering a human femur (Fig. 1). When discovered in 1951, the specimen
WALLACE S. BROECKER +2 more
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Measurement of annual ring width of log ends in forest machinery
SPIE Proceedings, 2008The quality of wood is of increasing importance in wood industry. One important quality aspect is the average annual ring width and its standard deviation that is related to the wood strength and stiffness. We present a camera based measurement system for annual ring measurements.
Kalle Marjanen +2 more
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The annual-ring sign of calculus in the setting of horseshoe kidney
The American Journal of the Medical Sciences, 2023Xiao, Han, Mingxing, Han, Jun, Li
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Annual, semi-annual and solar cycle variations in Sq, and ring current effects
Exploration Geophysics, 1986The difference of H at two magnetic observatories on the same meridian, but having latitudes equatorwards and polewards of the latitude of the Sq focus, yields a measure of Sq intensity largely free from disturbance. This is because the Sq variations are of opposite sign at the two observatories whereas the disturbance variations, having the same sign ...
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Vessel feature changes as a tool for detecting annual rings in tropical trees
Trees, 2014S. Ohashi +6 more
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Radiocarbon Ages of Annual Rings from Japanese Wood: Evident Age Offset Based on IntCal09
Radiocarbon: An International Journal of Cosmogenic Isotope Research, 2013Toshio Nakamura +4 more
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An Algorithm Based on DAF-Net++ Model for Wood Annual Rings Segmentation
Electronics, 2023Yucheng Zhou, Zhedong Ge
exaly