The new definition uses set elevations for each community, "which will make it much easier for someone applying for a permit, because the debris line can be highly variable," said Brian Thompson, the director of the department's Office of Long Island Sound Programs.
The use of a manufacturer-provided algorithm to calculate arm elevation from SMA data, however, resulted in a progressive discrepancy between the two methods of measurement, i.e. the greater the goniometer-set elevation angle, the greater the mean difference between goniometer-set and SMA-derived angles.
As an electronic device, we would argue that any unreliability we might have observed would only be related to the reliability of the researcher/universal goniometer in setting elevation angles (neither did we assess inter-tester reliability of this), and/or alterations in how the SMA was seated on the arm.
By way of example, if we had only examined data at goniometer-set elevation angles of 45 and 60 degrees in the current study (see Table 1), we would have reported an unjustifiably high level of agreement between the universal goniometer and the SMA.
Visual inspection of the Bland-Altman plots revealed obvious relationships between the difference and the mean, i.e. the greater the mean elevation angle (ergo in this study also the goniometer-set elevation angle), the greater the discrepancy between goniometer-set and SMA-derived angles (flexion: r = 0.742, p < 0.001; abduction: r = 0.665, p < 0.001).
In previous studies, the influence of external loads on scapular movement during arm elevation was evaluated by setting the elevation angle at intervals of 20° (de Castro et al. 2014; Forte et al. 2009; Kon et al. 2008; McQuade et al. 1998; Pascoal et al. 2000).
Alternative but unlikely explanations for the progressive discrepancy include that the researcher setting arm elevation with the universal goniometer systematically worsened in accuracy as the elevation angle increased, or that the SMA's accelerometer itself introduced a systematic error as it rotated around its longitudinal axis.
Set your dish to the correct elevation.
To address this challenge an attempt is made to estimate the small storage tank capacities as a function of their surface areas using Shuttle Radar Topographical Mapper (SRTM) data set of global elevations of 90m Digital Elevation Model (DEM).
