Data addition rate


The plot above shows the number of total records (1 for a curve in a plot) in our Starrydata database. We can see a clear upturn at Dec. 2017, and afterwards, the number of records show a linear increase. This time corresponds when a part-time data collector Yuki Ando joined our team (working 3 days / week). Since then, about 2,000 recorded are continuously added to our database each month. She firstly collected data on clathrate thermoelectric materials, and collected ~3,800 records within 2 months. Then she collected data for PbTe-type thermoelectric materials between Feb. and Apr. 2018. After then, she  collected data on Skutterudite thermoelectric materials.
We can expect that the database will be much greater in size, within a short period. Also, the data increase rate will increase if another data collector joins our team.


The next plot shows the numbers of data, by various counting methods.At the beginning of Jul. 2018, we had  18,897 independent datasets (records). A paper includes several figures, and each figure has several datasets, obtained by measuring different material samples. A sample appears in several plots. By specifying the figure and the sample, we can specify a dataset. Each dataset includs a number of data points (usually 5-100), as reported in the figures.

The numbers were compared to UCSB Thermoelectric data (MRL Datamining Chart / Energy Materials Datamining), which has been the largest open dataset for experimental data from thermoelectric materials.


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