Abstract: Described herein are methods, techniques and systems for a user to conduct authentication via inertial measurement unit data collected by the user's smartphone and video data collected by a drone recording the user operations for mutual authentication, as well as to prevent attacks of the authentication data, wherein correlation can be easily extended to using other information, such as noises, illuminance, GPS, and how the phone flashlight flashes.

Abstract: Internet of Things (IoT) devices lack conventional user interfaces, such as keyboards and displays, which make many traditional pairing approaches inapplicable. Proximity-based pairing approaches are very usable, but can be exploited by co-located malicious devices. A secure and usable pairing approach that can be applied to heterogeneous IoT devices still does not exist. The presently disclosed Universal Operation Sensing allows an IoT device to sense the user's physical operations on it without requiring inertial sensors. With this technique, a user holding a smartphone or wearing a wristband can finish pairing in seconds through some very simple operations, e.g., pressing a button or twisting a knob. A presently disclosed pairing protocol uses faithful fuzzy commitment, which is secure and usable.

Abstract: A medical endoscope device includes an optical component, an image sensor component, a driving apparatus, an operating member, and a detection apparatus. A trigger area of the detection apparatus reflects or transmits a detection light to form different reflected lights or different transmitted lights, and the different reflected lights or different transmitted lights generate different electrical signals, to represent a rotation angle and/or a rotation direction of the operating member, and to control the driving apparatus to adjust a distance of an optical path between the optical component and the image sensor component to achieve focusing.

Abstract: Described herein are systems and methods for secure and usable authentication techniques for drone delivery that leverages biometric information of faces, unlike traditional biometrics-based approaches, it does not need users to enroll their biometric information and is impervious to common drone attacks.

Abstract: A synchronous rectification control circuit has a turn-on detection circuit. The turn-on detection circuit has a slope detection circuit and a threshold generation circuit. The slope detection circuit generates a slope representation signal representing a falling slope of the detection signal. The threshold generation circuit generates a threshold signal by selecting one of threshold reference signals according to a driving signal. The turn-on detection circuit generates a comparison result signal by comparing the slope representation signal and the threshold signal for controlling the switch state of the synchronous rectification transistor.

Abstract: An optical module and a mobile terminal are provided. The optical module includes a collimator, a photosensitive unit, and a wiring structure, wherein the photosensitive unit is arranged on a surface of one side of the collimator, and the wiring structure is arranged on a surface of one side, away from the collimator, of the photosensitive unit.

Abstract: A method includes receiving a to-be-filtered web page element sent by a client in a local area network in which the main client is located; sending first query broadcast information including the to-be-filtered web page element to the local area network in which the main client is located; receiving first query feedback information generated by all clients in the local area network based on the first query broadcast information; if the first query feedback information meets a preset condition, determining that the to-be-filtered web page element is an advertisement; and updating an advertisement filtering rule based on the to-be-filtered web page element that is an advertisement.

Abstract: Described herein are methods, techniques and systems for a user to conduct authentication via inertial measurement unit data collected by the user's smartphone and video data collected by a drone recording the user operations for mutual authentication, as well as to prevent attacks of the authentication data, wherein correlation can be easily extended to using other information, such as noises, illuminance, GPS, and how the phone flashlight flashes.

Abstract: Secure pairing is key to trustworthy deployment and application of Internet of Things (IoT) devices. However, IoT devices lack conventional user interfaces, such as keyboards and displays, which make many traditional pairing approaches inapplicable. Proximity-based pairing approaches are very usable, but can be exploited by co-located malicious devices. Approaches based on a user's physical operations on IoT devices are more secure, but typically require inertial sensors, while many devices do not satisfy this requirement. A secure and usable pairing approach that can be applied to heterogeneous IoT devices still does not exist. We develop a technique, Universal Operation Sensing, which allows an IoT device to sense the user's physical operations on it without requiring inertial sensors. With this technique, a user holding a smartphone or wearing a wristband can finish pairing in seconds through some very simple operations, e.g., pressing a button or twisting a knob.

Abstract: A synchronous rectification control circuit has a turn-on detection circuit. The turn-on detection circuit has a slope detection circuit and a threshold generation circuit. The slope detection circuit generates a slope representation signal representing a falling slope of the detection signal. The threshold generation circuit generates a threshold signal by selecting one of threshold reference signals according to a driving signal. The turn-on detection circuit generates a comparison result signal by comparing the slope representation signal and the threshold signal for controlling the switch state of the synchronous rectification transistor.

Abstract: An optical module and a mobile terminal are provided. The optical module includes a collimator, a photosensitive unit, and a wiring structure, wherein the photosensitive unit is arranged on a surface of one side of the collimator, and the wiring structure is arranged on a surface of one side, away from the collimator, of the photosensitive unit.

Abstract: In a method for deleting a cascaded snapshot, a storage device includes a logical volume corresponding to a plurality of cascaded snapshots. The plurality of cascaded snapshots comprises at least a first snapshot, a second snapshot, and a third snapshot. The second snapshot is a parent snapshot of the first snapshot, the third snapshot being a child snapshot of the first snapshot. The storage device receives an instruction for deleting the first snapshot. The first snapshot comprises target data. The storage device migrates information of the target data to the second snapshot. Further, the storage device sets a parent snapshot identifier corresponding to the third snapshot to an identifier of the second snapshot, and deletes the first snapshot.

Abstract: A rolling mill system for Incremental rotary shaping of an elongated workpiece is provided that includes first and second workpiece holders. A support frame has a track with the first and second workpiece holders being movably associated with the track, the workpiece holders and an associated workpiece being movable in unison along the track. A radial chuck is mounted to the frame that includes a plurality of jaws that are movable radially inwardly and outwardly. Each jaw has a tool mounted thereto that is rotatable about an axis of rotation, with the axis of rotation of each tool being oriented at a skew angle relative to the longitudinal axis of a workpiece. A source of electric current and an electrically conductive flow path are provided for flowing electrical current through a workpiece. A controller is provided that is configured to control the operation of each of the first motor, second motor and third motor, and to control the flow of current flowing through the tools to the workpiece.

Abstract: A method for growing a crystalline composition, the first crystalline composition may include gallium and nitrogen. The crystalline composition may have an infrared absorption peak at about 3175 cm?1, with an absorbance per unit thickness of greater than about 0.01 cm?1. In one embodiment, the composition ay have an amount of oxygen present in a concentration of less than about 3×1018 per cubic centimeter, and may be free of two-dimensional planar boundary defects in a determined volume of the first crystalline composition.