Data addition rate

Timeline_records_mattype

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.

Timeline_records

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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