Abstract: Apparatus, method and storage medium associated with UAV position estimation are disclosed herein. In embodiments, an UAV may comprise a transmitter-receiver arrangement to transmit and receive communication signals, including receipt of absolute positioning system (APS) signals from one or more APS sensors, and wireless signals from one or more proximately located other UAVs; one or more motors or engines to provide propulsive force for the UAV; and a flight controller coupled to the transmitter-receiver arrangement and the one or more motors or engines to control at least the one or more motors or engines to provide propulsive force to navigate the UAV, based at least in part on the APS and relative positioning signals. Other embodiments may be disclosed or claimed.

Abstract: A self-biased amplifier includes a capacitor, a bias generation circuit and a common source amplifier. The capacitor is used to receive an input voltage and output an alternating component of the input voltage. The bias generation circuit is coupled to the capacitor, and used to generate a first bias voltage according to the alternating component. The common source amplifier is coupled to the bias generation circuit, and used to generate an amplified voltage according to the first bias voltage.

Abstract: An activity monitoring circuit enables power conservation for an activity monitoring system. The activity monitoring system includes a sensor device that generates activity data based on detected movement. An activity monitoring circuit receives the activity data as input from the sensor device, and processes the activity data. Based on the processing, the activity monitoring circuit signals the sensor device to change a duty cycle of its operation, by adjusting how long it is on and off. The activity monitoring circuit can include a sensor hub that determines an activity state indicated by the activity data and generates a prediction of stability of the determined activity state based on historical activity data. Based on activity state and stability, the sensor hub can determine a duty cycle for operation of the sensor device.

Abstract: Technologies for monitoring a health-risk condition of a user include a virtual reality compute device having one or more near infrared (NIR) sensors. The virtual reality compute device presents a virtual reality (VR) presentation to the user. The virtual reality compute device produces sensor data through the one or more NIR sensors that is indicative of a heart rate of the user and a blood pressure of the user while the VR presentation is presented to the user. The virtual reality compute device determines whether the user is in a health-risk condition based on a comparison of the heart rate of the user to a heart rate safety threshold and a comparison of the blood pressure of the user to a blood pressure safety threshold. The virtual reality compute device performs a health-risk condition response in response to a determination that the user is in the health-risk condition.

Abstract: A self-biased amplifier includes a capacitor, a bias generation circuit and a common source amplifier. The capacitor is used to receive an input voltage and output an alternating component of the input voltage. The bias generation circuit is coupled to the capacitor, and used to generate a first bias voltage according to the alternating component. The common source amplifier is coupled to the bias generation circuit, and used to generate an amplified voltage according to the first bias voltage.

Abstract: A method for detecting cardiac arrhythmia based on a photoplethysmographic (PPG) signal is provided. The method includes: receiving a PPG signal and a motion signal corresponding to a motion made by a user; extracting PPG signal segments and motion signal segments corresponding to a time period from the PPG signal and the motion signal, respectively, at every time period; filtering out motion artifact noise in the PPG signal segments according to the PPG signal segments and the motion signal segments, and converting the PPG signal segments and the motion signal segments into PPG spectrum diagrams and motion spectrum diagrams, respectively; obtaining an estimated heart rate according to the PPG spectrum diagrams and the motion spectrum diagrams; and determining whether cardiac arrhythmia is present based on the filtered PPG signal segments and the estimated heart rate.

Abstract: A crystal oscillator with a configuration that allows for reduction of power consumption includes a crystal element, a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a ninth transistor, a crystal element. The crystal element includes a first terminal coupled to a control terminal of the seventh transistor and a second terminal coupled to a first terminal of the seventh transistor. The second transistor includes a control terminal coupled to an output terminal of the crystal oscillator and a first terminal of the ninth transistor.

Abstract: Provided herein are techniques for making low-carbon steels with high surface hardness. A technique includes heating a low-carbon steel precursor material in a furnace to form molten steel material, increasing the free oxygen content of the molten steel material to a predetermined level, and then solidifying the molten steel material having the predetermined oxygen level to produce a steel structure by cooling the molten steel material at a predetermined cooling rate. The predetermined oxygen level and the predetermined cooling rate are effective to produce the low-carbon steel with a high surface hardness. The low-carbon steel may have inclusions smaller than about 1 ?m.

Abstract: Geofence crossing-based control systems and techniques are described herein. For example, a geofence crossing control technique may include receiving a location signal indicative of a range of locations in which a mobile computing device is located; receiving a velocity signal indicative of a speed and direction of the mobile computing device; generating, for each of a plurality of candidate geofence crossing times, a performance indicator based on the location signal, the velocity signal, and a boundary of the geofence; selecting a geofence crossing time from the plurality of candidate geofence crossing times based on the performance indicators; and transmitting a control signal representative of the geofence crossing time. Other embodiments may be disclosed and/or claimed.

Abstract: A virtual reality headset system includes a vision correction module. The vision correction system can detect a degree of myopia or other visual ailment of a user of the VR system, and then adjust a vision correction lens to adjust for user myopia. An implementation of the vision correction module can adjust right and left lenses separately.

Abstract: This document describes a process/strategy for age hardening nickel based alloys to create desirable properties with reduced energy expenditure. The inventive process introduces isolated atom nucleation sites to accelerate the nucleation rate by approximately 36 times, thereby permitting age hardening to occur in significantly less time and with significantly less energy expenditure.

Abstract: Technologies for detecting micro-motion based input gestures include a wrist-wearable computing device that includes sensors from which values for micro-motion states can be determined. Each micro-motion state is indicative of a motion-related characteristic of the wrist-wearable computing device that is used to determine whether a sequence of detected gesture steps matches an input gesture model associated with an input gesture. The input gesture model defines a required sequence of required gesture steps from which an input gesture may be determined.

Abstract: Technologies for determining a user's location include a mobile computing device to determine, based on sensed inertial characteristics of the device, a walking gait of a user. The walking gait is one of a first gait indicative of the user holding the g device to the user's side or a second gait indicative of the user swinging the device along the user's side. The device further detects that the user has taken a physical step based on the inertial characteristics and the determined walking gait of the user, and determines a raw directional heading of the device indicative of a direction of the physical step. The device determines an estimated location of the user based on the determined raw directional heading, an estimated step length, and the user's previous location.

Abstract: Apparatus, method and storage medium associated with UAV position estimation are disclosed herein. In embodiments, an UAV may comprise a transmitter-receiver arrangement to transmit and receive communication signals, including receipt of absolute positioning system (APS) signals from one or more APS sensors, and wireless signals from one or more proximately located other UAVs; one or more motors or engines to provide propulsive force for the UAV; and a flight controller coupled to the transmitter-receiver arrangement and the one or more motors or engines to control at least the one or more motors or engines to provide propulsive force to navigate the UAV, based at least in part on the APS and relative positioning signals. Other embodiments may be disclosed or claimed.

Abstract: This invention refers to a detachable carbon-fiber conductive rail in the technical field of conductive rail. The conductive rail above has a main body that consists of a long connecting pipe module linked with an elastic sheet module at one end, and at the other end of the elastic sheet module far away from the long connecting pipe module, there is a short connecting pipe module. In this invention, the long connecting pipe module, the elastic sheet module and the short connecting pipe module are connected in sequence. In this way, operators can dismount and install the modules easily to improve efficiency of installation and bring down the costs. As for this detachable carbon-fiber conductive rail, multiple long connecting pipe modules, elastic sheet modules and short connecting pipe modules can be connected together in sequence to shape several conductive rails. The installation circuits can be curved, straight or annular.

Abstract: Technologies for determining a user's location by a mobile computing device include detecting, based on sensed inertial characteristics of the mobile computing device, that a user of the mobile computing device has taken a physical step in a direction. The mobile computing device determines a directional heading of the mobile computing device in the direction and a variation of an orientation of the mobile computing device relative to a previous orientation of the mobile computing device at a previous physical step of the user based on the sensed inertial characteristics. The mobile computing device further applies a Kalman filter to determine a heading of the user based on the determined directional heading of the mobile computing device and the variation of the orientation and determines an estimated location of the user based on the user's determined heading, an estimated step length of the user, and a previous location of the user at the previous physical step.

Abstract: Memory sharing techniques are provided for offloading an application from a host processor to an integrated sensor hub (ISH). A methodology implementing the techniques according to an embodiment includes allocating a shared region of memory to be accessed by the host processor and by the ISH, in connection with the execution of a location application. The method also includes storing a location database in the shared region of memory. The location database is divided into segments, where each segment is associated with an area, for example, defined by a range of latitudes and longitudes. The method further includes transferring, through a direct memory access (DMA), one or more of the segments between the shared memory region and a second memory associated with the ISH. The method further includes executing at least a portion of the location application on the ISH, based on the data segments stored in the second memory.

Abstract: Embodiments of the present disclosure provide for an apparatus for facilitating a connection with an external sensor module, in accordance with some embodiments. In one instance, the apparatus may include a processor and a sensor hub coupled with the processor, wherein the sensor hub may include a bus to provide a connection between the apparatus and the external sensor module. The apparatus may further include signal pattern generation circuitry coupled with the sensor hub to generate a signal pattern in response to a connection of the external sensor module to the apparatus via the bus or disconnect of the external sensor module from the bus, to indicate an insert or remove event to the apparatus, and facilitate the connection of the apparatus with the external sensor module. Other embodiments may be described and/or claimed.

Abstract: Techniques are disclosed for enabling an integrated sensor hub of a main computer to access a detachable peripheral device. In an embodiment, a system includes a main unit having a peripheral interface, an embedded controller, and a device controller. The peripheral interface is configured to be detachably coupled to a peripheral. The peripheral includes a control unit and an input/output device. The embedded controller is configured to communicate with the control unit of the peripheral via the peripheral interface while the peripheral is attached to the peripheral interface. The embedded controller includes at least one data register, and in some embodiments, a set of data registers, configured to store data relating to the peripheral and to the corresponding input/output device. The device controller is configured to read data from the data register(s) of the embedded controller, write data to the data register(s) of the embedded controller, or both.