@article{oai:nufs-nuas.repo.nii.ac.jp:00000035,
 author = {大矢, 芳彦},
 issue = {31},
 journal = {名古屋外国語大学外国語学部紀要, Journal of School of Foreign Languages, Nagoya University of Foreign Studies},
 month = {Aug},
 note = {Roundness is one of the useful information derived from sedimentary clasts. As the measurement method, however, is ambiguous and objective, the discussion based on roundness has been not quantitative but qualitative until now.
This study shows new measurement method of roundness, which is obtained by transform from two dimension image of clasts in time series data. In concrete terms, the silhouettes of pebbles in Krumbein's plate are graphed with software on the market, and the data can be analyzed using time series methods.
As a result of that, an especially plain feature was not admitted in the autocorrelation analysis in individual pebble data. But it is found that the lower roundness shows the larger standard deviation of difference between the moving average (MA) and the physical value.The correlation of roundness and the standard deviation with MA = 30 is extremely high (r= 0.947). At that time, the relational expression of roundness (x) in MA=30 and the standard deviation (y) is shown with y = − 0.0139x+0.0148. The data from Powers' report has also the relation between roundness and the standard deviation in extremely high correlation (r = 0.960). The relational expression in this case is shown by y = − 0.0073log(x) +0.0019.},
 pages = {1--15},
 title = {時系列解析を応用した砕屑物の円磨度の測定方法},
 year = {2006},
 yomi = {オオヤ, ヨシヒコ}
}