Combining these two sources of data, they used the survey data to train a machine learning model to predict a person's wealth based on their call records… they were able to produce high-resolution maps of the geographic distribution of wealth in Rwanda.
Based on their call pattern from the previous year, the researchers estimated that these 10 people would make 100 calls to 911 during the three months of the program.
The paper [26] presents an approach that identifies the fraudulent calls by initially forming groups of mobile phone users based on their calling instances present in the training set.
The researchers also built a classifier for whether someone was in a relationship, based on their call and text records, and once they had labeled a person as being in a relationship identifying their partner was "trivial" — again from the metadata.
Lasiurus spp. were identified based on their call ranges (lower than Eptesicus furinalis for L. ega and L. intermedius, higher for L. blossivillii) and undulating minimum frequencies within the same call sequence.
Of 52,183 SNPs (52,077 SNPs on the 60 K chip [ 11] and 106 internally developed SNPs), 11,718 informative SNPs were selected for further analysis based on their call rates, minor allele frequencies, and Hardy-Weinberg equilibrium (HWE) tests (Methods).
Recent experimental evidence reveals that horseshoe bats (R. euryale and R. mehelyi) and emballonurid bats (Saccopteryx bilineata) are indeed able to recognise the sex of conspecifics based on their echolocation calls [ 44, 156].
Using self-reported gender information available for most users (see File S1), we find that during emergencies female users are more likely to make a call than expected based on their normal call patterns.
