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Estimation of Bedtimes of Reddit Users: Integrated Analysis of Time Stamps and Surveys
More formally, the fraction r of a user’s total Reddit posts falling within a given 15-minute interval of the 24-hour day is modeled as:
where x is the number of hours after the user’s average bedtime, a, b, and c are fitted quadratic parameters, S and E are fitted parameters for the start time and end time of the parabolic section of the model, and d is the constant portion of the model, which, in order to make the total sum to 1 is calculated as
In model fitting, a series of fitting runs are performed, comprising
JMIR Form Res 2023;7:e38112
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To avoid potential performance loss because of this phenomenon, we proposed an additional partition scheme, in which the partitions adjacent to the pole points are combined into 1 partition as shown in Figure 2, part (b).
The number of orientation bins for this second partition scheme, which merges the direction areas near the pole into 1 direction, is calculated using the equation in:
For the convenience of calculation, the value of NDIR2 is constrained to be an even number.
JMIR Med Inform 2020;8(5):e15767
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