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4 results for “lognormal distribution”
Data for "Soil CO2 efflux errors are lognormally distributed - Implications and guidance."
<p>Soil CO2 flux data at site ES-LMa of four automatic chambers in the control-openLand-subplot for the period from 2015-11-10 to 2016-11-10.</p> <p>These data were used for the publication:</p> <p>Wutzler, et al. (2020) "Soil CO2 efflux errors are lognormally distributed - Implications and guidance." Geoscientific Instrumentation, Methods, and Data Systems</p> <p>Variables, units and description are found in the ReadmeDataDescription.csv file</p> <p> </p>
Validity of lognormal distribution in analyzing laboratory test values
<p>This is the supplementary data for our paper titled "Validity of lognormal distribution in analyzing laboratory test values" which was presented in Medinfo 2021.</p> <p>This ZIP file contains following files,</p> <p>* Materials.pdf<br> Data information.</p> <p>* Experiment1-DataRange.csv<br> Ranges of values for each laboratory test item.</p> <p>* Experiment1-distributons.xlsx<br> Full data of the Table 1.</p> <p>* Experiment1-figure1-all.pdf<br> Figure 1 (Estimated distributions using lnorm3) for all tests.</p> <p>* Experiment2-figure2-all.pdf<br> Figure 2 (Estimated distributions of four datasets using lnorm3) for all tests.</p> <p>This data was made under the approval by the Ethics Committee of the University of Tsukuba Hospital (permission number: R1-080). Anyone can use this data freely under the CC BY-ND ( https://creativecommons.org/licenses/by-nd/4.0/ ). </p>
Data from: A lognormal distribution of the lengths of terminal twigs on self-similar branches of elm trees
Lognormal distributions and self-similarity are characteristics associated with a wide range of biological systems. The sequential breakage model has established a link between lognormal distributions and self-similarity and has been used to explain species abundance distributions. To date, however, there has been no similar evidence in studies of multicellular organismal forms. We tested the hypotheses that the distribution of the lengths of terminal stems of Japanese elm trees (Ulmus davidiana), the end products of a self-similar branching process, approaches a lognormal distribution. We measured the length of the stem segments of three elm branches and obtained the following results: (i) each occurrence of branching caused variations or errors in the lengths of the child stems relative to their parent stems; (ii) the branches showed statistical self-similarity; the observed error distributions were similar at all scales within each branch and (iii) the multiplicative effect of these errors generated variations of the lengths of terminal twigs that were well approximated by a lognormal distribution, although some statistically significant deviations from strict lognormality were observed for one branch. Our results provide the first empirical evidence that statistical self-similarity of an organismal form generates a lognormal distribution of organ sizes.
Data from: A lognormal distribution of the lengths of terminal twigs on self-similar branches of elm trees
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