Abstract: Monitoring vital signs via machine learning is provided. A system can identify data points of signals detected via skin of a user by an optical sensor that indicate changes in volume of blood flowing through a capillary at the skin. The system generates features from the data points. The system inputs the features into a model to produce output. The model can be trained using training data including features and labels corresponding to blood pressure measurements from a reference device. The system determines a value of blood pressure for the user based on the output from the model. The system provides an indication of the value of blood pressure via an interface.

Abstract: A battery cell and method for manufacturing the same are provided. The battery cell includes a binder-free dough-like cathode separated from a sponge zinc anode by a separator and a hybrid aqueous electrolyte.

Abstract: An outside plant equipment enclosure for housing telecommunications equipment, which normally operates when the equipment enclosure is closed, is provided. The enclosure includes an internal compartment for storing telecommunications equipment, at least one opening in the internal compartment and a hydrophobic material. The at least one opening defines substantially the entire area of the internal compartment which is open to an outer atmosphere when the telecommunications equipment is normally operating. The hydrophobic material entirely covers every opening of the at least one opening.

Abstract: A circuit board connecting device electrically connects exposed back ends of circuit boards when the front ends of the circuit boards are received in a holder. The connecting device has first connectors, second connectors and a connector substrate. The first connectors are attached respectively to the back ends of the circuit boards and extend lengthwise with the back ends of the circuit boards. The second connectors are adapted for connection respectively to the first connectors when the first and second connectors are aligned in a plane parallel to a plane in which the circuit boards extend. The connector substrate has the second connectors attached thereto, extending perpendicular therefrom. The second connectors are electrically connected to each other on the connector substrate. The connector substrate is fixedly attached to one of the circuit boards.

Abstract: A device is disclosed for insulating and keying quick disconnect connectors. The device is wrapped around the quick disconnect connection with the wire already crimped in the quick disconnect connection and snaps on securely. It provides a multicombination key which prevents the insertion of a keyed insulator in the inappropriate mating connector slot.