Abstract: An apparatus for sensing a heart rate of a subject, including an eyewear frame and a heart rate sensing circuit. The sensing circuit includes first and second piezoelectric sensors configured to be in communication with the subject's skin and to generate first and second voltage signals in response to a periodic vibration in at least one artery of the subject, a first voltage amplifier configured to receive the first voltage signal and output a first amplified voltage signal related to the heart rate of the subject, a second voltage amplifier configured to receive the second voltage signal and output a second amplified voltage signal related to the heart rate of the subject, and a device configured to output a differential signal that is a representation of a difference between the first amplified voltage signal and the second amplified voltage signal that relates to the heart rate.

Abstract: An apparatus for sensing a heart rate of a subject, including an eyewear frame and a heart rate sensing circuit. The sensing circuit includes first and second piezoelectric sensors configured to be in communication with the subject's skin and to generate first and second voltage signals in response to a periodic vibration in at least one artery of the subject, a first voltage amplifier configured to receive the first voltage signal and output a first amplified voltage signal related to the heart rate of the subject, a second voltage amplifier configured to receive the second voltage signal and output a second amplified voltage signal related to the heart rate of the subject, and a device configured to output a differential signal that is a representation of a difference between the first amplified voltage signal and the second amplified voltage signal that relates to the heart rate.

Abstract: Methods, apparatus, systems, and articles of manufacture to facilitate data transmission are disclosed. An examples apparatus includes a schedule controller to determine a first time corresponding to an end of a window for a data exchange; a data packet controller to determine a second time corresponding to an acknowledgement send during the window; a link performance calculator to calculate link performance based on the first time and the second time; and an interface to transmit the link performance to a network configuration entity.

Abstract: Embodiments of the present disclosure provide techniques and configurations for an apparatus for providing a user's physiological context measurements. In one instance, the apparatus may include a physiological context measurement module including first and second electrodes, to obtain one or more parameters of physiological context of a user in response to a provision of contact of the first and second electrodes with a portion of the user's body while the physiological context measurement module is powered on; and a third electrode coupled with the module, which may be powered on in response to detection of contact between the user's body portion and the third electrode. The first, second, and third electrodes are disposed to facilitate simultaneous contact of the user's body portion with the electrodes, and collection of the one or more parameters of the physiological context while the simultaneous contact is maintained. Other embodiments may be described and/or claimed.

Abstract: Apparatuses, systems, and methods described herein can enable reliable estimation of pulse transit time (PTT) for a user in motion for cuffless blood pressure estimation. In one embodiment, a method involves receiving an electrocardiographic (ECG) signal and a photoplethysmographic (PPG) signal and detecting R-wave peaks in the ECG signal. The method further involves identifying multiple segments of the PPG signal based on detection of the R-wave peaks of the ECG signal, wherein a given segment of the PPG signal comprises multiple samples and is aligned with a corresponding R-wave. The method also involves generating an averaged PPG wave based on the multiple segments of the PPG signal, wherein a given element of the averaged PPG wave comprises an average of corresponding elements from the multiple segments of the PPG signal, and computing the blood pressure value based on the averaged PPG wave.

Abstract: Embodiments of the present disclosure provide techniques and configurations for an apparatus for opportunistic measurements of a user's physiological context, such as evaporation rate. In one instance, an apparatus may include a chamber with a first side and a second side opposite the first side. The chamber may be disposed with the first side in proximity to or in contact with a surface (e.g., body of the user). The first side may include a first opening to allow evaporation from the surface to enter the chamber. The chamber may include a second opening to allow the evaporation to exit the chamber. The chamber may further include first and second sensors (e.g., humidity sensors) disposed inside the chamber, to detect the evaporation from the surface. The apparatus may be configured to measure the evaporation based on evaporation readings provided by the sensors. Other embodiments may be described and/or claimed.

Abstract: Apparatuses, systems, and methods described herein can enable reliable estimation of pulse transit time (PTT) for a user in motion for cuffless blood pressure estimation. In one embodiment, a method involves receiving an electrocardiographic (ECG) signal and a photoplethysmographic (PPG) signal and detecting R-wave peaks in the ECG signal. The method further involves identifying multiple segments of the PPG signal based on detection of the R-wave peaks of the ECG signal, wherein a given segment of the PPG signal comprises multiple samples and is aligned with a corresponding R-wave. The method also involves generating an averaged PPG wave based on the multiple segments of the PPG signal, wherein a given element of the averaged PPG wave comprises an average of corresponding elements from the multiple segments of the PPG signal, and computing the blood pressure value based on the averaged PPG wave.

Abstract: An apparatus for sensing a heart rate of a subject, including an eyewear frame and a heart rate sensing circuit.

Abstract: A circuit interconnect may be used in biometric data sensing and feedback applications. A circuit interconnect may be used in device device-to-device connections (e.g., Internet of Things (IoT) devices), including applications that require connection between stretchable and rigid substrates. A circuit interconnect may include a multi-pin, snap-fit attachment mechanism, where the attachment mechanism provides an electrical interconnection between a rigid substrate and a flexible or stretchable substrate. The combination of a circuit interconnect and flexible or stretchable substrate provides improved electrical connection reliability, allows for greater stretchability and flexibility of the circuit traces, and allows for more options in connecting a stretchable circuit trace to a rigid PCB.

Abstract: Embodiments of the present disclosure provide techniques and configurations for a wearable sensor apparatus. In one instance, the apparatus may comprise a flexible substrate and conductive fabric component that comprises a first length and that may be attachably mounted on the flexible substrate. The conductive fabric component, in response to a direct or indirect application of external force to the flexible substrate, may stretch between the first length and a second length that is greater than the first length, and generate an electric parameter based at least in part on an amount of the applied external force. Other embodiments may be described and/or claimed.

Abstract: Apparatuses, systems, and methods described herein can enable reliable estimation of pulse transit time (PTT) for a user in motion for cuffless blood pressure estimation. In one embodiment, a method involves receiving an electrocardiographic (ECG) signal and a photoplethysmographic (PPG) signal and detecting R-wave peaks in the ECG signal. The method further involves identifying multiple segments of the PPG signal based on detection of the R-wave peaks of the ECG signal, wherein a given segment of the PPG signal comprises multiple samples and is aligned with a corresponding R-wave. The method also involves generating an averaged PPG wave based on the multiple segments of the PPG signal, wherein a given element of the averaged PPG wave comprises an average of corresponding elements from the multiple segments of the PPG signal, and computing the blood pressure value based on the averaged PPG wave.

Abstract: Discussed generally herein are methods and devices including or providing a patch system that can help in diagnosing a medical condition and/or provide therapy to a user. A body-area network can include a plurality of communicatively coupled patches that communicate with an intermediate device. The intermediate device can provide data representative of a biological parameter monitored by the patches to proper personnel, such as for diagnosis and/or response.

Abstract: Discussed generally herein are methods and devices including or providing a magnetic, detachable, conductive connector to provide an electrical and mechanical connection between parts. A device can include a first substrate, at least one electric component on or at least partially in a first surface of the first substrate, an adhesive on the first surface of the first substrate to temporarily attached the device to skin of a user, a contact pad electrically coupled to an electric component of the at least one electric component, the contact pad on or at least partially in a second surface of the substrate, the first surface opposite the second surface, and a conductive magnetic connector electrically and mechanically connected to the contact pad through a first conductive adhesive.

Abstract: A circuit interconnect may be used in biometric data sensing and feedback applications. A circuit interconnect may be used in device device-to-device connections (e.g., Internet of Things (IoT) devices), including applications that require connection between stretchable and rigid substrates. A circuit interconnect may include a multi-pin, snap-fit attachment mechanism, where the attachment mechanism provides an electrical interconnection between a rigid substrate and a flexible or stretchable substrate. The combination of a circuit interconnect and flexible or stretchable substrate provides improved electrical connection reliability, allows for greater stretchability and flexibility of the circuit traces, and allows for more options in connecting a stretchable circuit trace to a rigid PCB.

Abstract: A system can include a first portion of a fabric fastener, a second portion of the fabric fastener, wherein the first portion and the second portion are configured to mechanically connect with each other and to resist separation from each other once connected, and wherein the first and second portions include a plurality of corresponding electrical contacts configured to form a plurality of individual electrical connections when the first portion is mechanically connected with the second portion.

Abstract: Embodiments of the present disclosure provide techniques and configurations for an apparatus for providing liquid quality measurements. In one instance, the apparatus may comprise a printed circuit board (PCB) having first and second electrodes associated with the PCB, to directly contact with a liquid to obtain a plurality of electrical parameters of the liquid when electrical current passes between the first and second electrodes while in contact with the liquid, wherein the electrical parameters are associated with quality of the liquid. The PCB may further comprise circuitry disposed thereon and coupled to the first and second electrodes to collect the electric parameters of the liquid. Other embodiments may be described and/or claimed.

Abstract: Discussed generally herein are methods and devices including or providing a wellness monitoring system. The wellness monitoring system can include a first patch including a flexible, stretchable first substrate, a first adhesive on the first substrate, the first adhesive configured to attach the first patch to skin of a user, and first electronics on or at least partially in the first substrate, the first electronics to monitor a first biological parameter of the user, and a second patch including a flexible, stretchable second substrate, a second adhesive on the second substrate, the second adhesive configured to attach the second patch to skin of the user, and second electronics on or at least partially in the second substrate, the second electronics to monitor a second biological parameter of the user, the second biological parameter different from the first biological parameter.

Abstract: Discussed generally herein are methods and devices including or providing a patch system that can help in diagnosing a medical condition and/or provide therapy to a user. A body-area network can include a plurality of communicatively coupled patches that communicate with an intermediate device. The intermediate device can provide data representative of a biological parameter monitored by the patches to proper personnel, such as for diagnosis and/or response.

Abstract: Discussed generally herein are methods and devices including or providing a magnetic, detachable, conductive connector to provide an electrical and mechanical connection between parts. A device can include a first substrate, at least one electric component on or at least partially in a first surface of the first substrate, an adhesive on the first surface of the first substrate to temporarily attached the device to skin of a user, a contact pad electrically coupled to an electric component of the at least one electric component, the contact pad on or at least partially in a second surface of the substrate, the first surface opposite the second surface, and a conductive magnetic connector electrically and mechanically connected to the contact pad through a first conductive adhesive.

Abstract: A system can include a first portion of a fabric fastener, a second portion of the fabric fastener, wherein the first portion and the second portion are configured to mechanically connect with each other and to resist separation from each other once connected, and wherein the first and second portions include a plurality of corresponding electrical contacts configured to form a plurality of individual electrical connections when the first portion is mechanically connected with the second portion.