Abstract: A computer-implemented method for synchronizing a PPG signal with an ECG signal includes: recording the ECG and PPG signals semi-synchronously; cutting the PPG signal into PPG signal pieces; for a PPG signal piece: determining distances d between a vector of PPG peak times and respective vectors of ECG peak times for respective ECG signal pieces obtained by applying different offsets o; determining a best matching ECG signal piece with minimal distance do; and registering start time x of the PPG signal piece, start time yo of the best matching ECG signal piece, and the minimal distance do; determining an offset and drift between the PPG signal and ECG signal as the offset and slope of a regression model modelling the relation between the start time x and start time yo, inverse weighted by the minimal distance do; applying the offset and drift to the PPG signal.

Abstract: A computer-implemented method for generating an annotated photoplethysmography signal, includes: recording an electrocardiogram or ECG signal; recording a photoplethysmography or PPG signal, semi-synchronously with the recording of the ECG signal; annotating segments in the ECG signal either algorithm-based or expert-based; time-aligning the PPG signal and the ECG signal; detecting ECG beats in the ECG signal; detecting PPG beats in the PPG signal; pairing the ECG beats onto the PPG beats; deriving annotations for PPG signal segments based on the nature of the ECG segment annotations and on how the ECG beats can be paired with the PPG beats; and annotating the PPG signal segments using the annotations, thereby generating the annotated PPG signal.

Abstract: To command notably the unclamping and the separation of two components, on a spacecraft, such as a satellite or a probe, a single actuation pushing device (10) is driven by a form memory device (36) positioned in a casing (12), between a wall (18) of the latter and a boss (24). It is linked to a heater (38). A system to prevent mistakes (20, 26, 32), sensitive to a displacement of the component (24) caused by an elongation of the device (36), prevents assembly of the pushing device (10) when it has already been actuated.

Abstract: A coupling device comprises a shackle (20) mounted to be pivotable about an axis (21) orthogonal to branches (22) of the shackle for surrounding a stem (12), a locking mechanism having a screw (31) and a nut (32), and a clip (40). The nut has a bevel (320), an orientation maintaining arrangement (321) and a cam (322) together with a brake (33). The clip is provided with elastically yieldable legs (41) for maintaining the clip in position, and arm (43) elastically biasing the nut (32) and, optionally, a safety strip (44) having a hook (440). This device permits easily, rapidly and reliably coupling the shackle and the stem associated with driving and driven shafts. The coupling device is applied in the steering device of an automobile wherein the shackle is connected to a yoke of a universal joint associated with a shaft, and wherein the stem is connected to a gear wheel of the steering box.