Amazon Technologies, Inc.

Sichao Shi

Carlos Alejandro Arguelles

Haithem Albadawi

Anantharanga Prithviraj

Kathleen Joanna Tsoukalas

A photoplethysmogram (PPG) signal may be used to determine values representing a pulse rate, oxygen saturation, or respiration rate of a user by determining data points of the signal that correspond to local maxima (peaks) and local minima (valleys). Peaks and valleys are identified based on the directional components of sets of points that precede and follow the peak or valley, and values for one or more of those points relative to the value for the peak or valley. Once peaks and valleys of the signal are identified, lengths of time between adjacent peaks or valleys may be used to determine pulse rate. Differences in values represented by an adjacent peak and valley for different wavelengths of the PPG signal may be used to determine oxygen saturation. Changes in distances between adjacent peaks or valleys and amplitude of the PPG signal over time may be used to determine respiration rate.

Systems for determining physiological values based on signal characteristics

Methods, systems, and computer-readable media for ordered test execution based on code coverage are disclosed. A suite of tests are executed on a first version of program code to generate data indicative of code coverage of respective tests with respect to the program code. A mapping of the tests to the program code is determined based at least in part on the data indicative of code coverage and is stored. The mapping comprises data indicative of one or more portions of the program code exercised by respective tests from the suite. Based at least in part on the mapping of the tests to the program code and on data indicative of one or more modified or new portions of a second version of the program code, a subset of the tests is determined that are likely to be exercised by the second version of the program code.

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Seattle, WA, United States of America

Sichao Shi