Abstract: A boron nitride layer and a method of fabricating the same are provided. The boron nitride layer includes a boron nitride compound and has a dielectric constant of about 2.5 or less at an operating frequency of 100 kHz.

Abstract: A collision warning system and method are provided. The system includes an image capturing apparatus, a sensing apparatus, and a computing apparatus. The computing apparatus analyzes a vehicle side image to generate a plurality of objects and an object coordinate corresponding to each of the objects. The computing apparatus calculates an aerial view coordinate corresponding to each of the objects based on the object coordinates and a pitch angle corresponding to the image capturing apparatus. The computing apparatus calculates a predicted collision time between the vehicle and each of the objects based on a vehicle speed, a turning angle, and the aerial view coordinates. The computing apparatus generates a plurality of warning regions and determines a warning scope corresponding to each of the warning regions based on the predicted collision times.

Abstract: A gradient-index phononic crystal flat lens which controls the behavior of an acoustic wave having a designated frequency. The gradient-index phononic crystal flat lens may include one or more super cells each having a plurality of layers stacked in a vertical direction according to a target gradient index profile, wherein each of the layers is composed of an aggregate in which unit cells having scatterers formed with the same size in the centers thereof are arranged in a horizontal direction. The one or more super cells may each include a divider provided between the neighboring layers, and configured to force the acoustic wave to propagate in the horizontal direction within the gradient-index phononic crystal flat lens.

Abstract: A lubricity modifier for fuels contain a dicarboxylic acid monoester compound represented by formula (I). In formula (I), R1 represents a single bond, a substituted or unsubstituted C2-6 divalent alkenyl group, or a group having a structure of —R3—R4—R5—; R2 represents a substituted or unsubstituted C1-40 hydrocarbyl group; R3 and R5 each independently represents a single bond, or a substituted or unsubstituted C1-3 divalent alkyl group; and R4 represents a substituted or unsubstituted C3-12 divalent alicyclic group.

Abstract: Disclosed herein are a contour-based privacy region masking apparatus and method. The contour-based privacy region masking apparatus includes a memory for storing at least one program, and a processor for executing the program, wherein the program may perform detecting a contour of an object that is a privacy protection target in an original image, setting a masking region based on the detected contour, and de-identifying the masking region in the original image.

Abstract: A motor control method for coupled an electronic vehicle is provided. The motor controller controls a motor and is powered by a battery. The motor control method includes: when a main relay of the motor controller suddenly breaks contact, in a first phase, feeding back a surge current into the battery to suppress the surge current by a diode and a first current limit resistor of a first protecting circuit of the motor controller; and, in a second phase, conducting a discharge switch of a second protecting circuit of the motor controller by a control unit of the motor controller, and releasing the surge current to a reference voltage range by the discharge switch and a second current limit resistor of the second protecting circuit.

Abstract: A weeding robot and a method and apparatus for planning a weeding path for the weeding robot and a medium are provided. The method for planning a weeding path for the weeding robot includes the following steps: acquiring an image segmentation model based on neural network model training, where the image segmentation model is configured to identify and segment a weed target feature, a soil target feature and a crop target feature; and based on the weed target feature, acquiring the weed target feature by intra-camera tracking, and acquiring the weed target feature by inter-camera tracking, and planning a weeding path for a weeding robotic arm of the weeding robot, to enable the weeding robotic arm to weed according to the weeding path.

Abstract: The present invention relates to a surface-enhanced Raman scattering patch and an attachable sensor using same. More particularly, the present invention relates to a surface-enhanced Raman scattering patch which allows continuous monitoring of drug administration and harmful substance detection to be accurately and easily performed, an attachable sensor using same, and a method for manufacturing same.

Abstract: A device and method for shutting off fluid-flow in a pipe. The device includes a moveable sealing member inside a pipeline, a longitudinal spring configured to bias against the sealing member in a first direction, and a lateral spring at an angle to the longitudinal spring wherein the lateral spring is configured to bias against the sealing member in a second direction. The device includes a housing with a passage configured to be positioned inline with a pipeline, and a sealing seat. A locking element is biased against the sealing member using the lateral spring to maintain an open position with the sealing member off of the sealing seat. The locking element is configured to move from the sealing member upon a fluid overpressure in the passage, whereby the sealing member extends into the seal seat to close off the pipeline upon the overpressure.

Abstract: A tube joint apparatus for a double-tube floating tunnel and a construction method thereof are provided, the apparatus includes a joint device, a tunnel tube body, and an escape device. The escape device is provided in the joint device, the tunnel tube body is respectively connected to left and right ends of the joint device. A plurality of anchor yokes are connected to an outside of the joint device. The joint device includes a watertight locking structure section, a framework connection section, and a main functional section. The main functional section includes a joint inner road surface and a joint housing. The joint inner road surface is provided in the joint housing, and the watertight locking structure section is respectively connected to two ends of the framework connection section. The present disclosure improves a utilization rate of an internal space in the underwater floating tunnel.

Abstract: A time-domain or frequency domain system includes, a sample light path between a source interface and a detector interface, a reference light path between the source interface and the detector interface, and a photonic integrated circuit, wherein the reference light path is at least partially separate from the sample light path, wherein the sample light path includes a forward sample light path between the source interface and a sample interface, and a backward sample light path between the sample interface and the detector interface, wherein the forward sample light path and the backward sample light path are at least partially provided by the photonic integrated circuit, and wherein the photonic integrated circuit includes an integrated sample-side polarization beam splitter arranged in the forward sample light path and the backward sample light path.

Abstract: A bio sensor using a FET element and an extended gate, and an operating method thereof are disclosed. A biosensor using a field effect transistor (FET) device and an extended gate electrode according to the present invention is characterized by comprising: an extended gate electrode connected to the FET element; a sensing electrode made of the same material as the extended gate electrode and on which a receptor antibody selectively recognizing a target molecule is fixed; and a reference electrode that maintains a constant potential and is selectively connected to the sensing electrode.

Abstract: Datasets for autonomous driving systems and multi-modal scenes may be automatically labeled using previously trained models as priors to mitigate the limitations of conventional manual data labeling. Properly versioned models, including model weights and knowledge of the dataset on which the model was previously trained, may be used to run an inference operation on unlabeled data, thus automatically labeling the dataset. The newly labeled dataset may then be used to train new models, including sparse data sets, in a semi-supervised or weakly-supervised fashion.

Abstract: The invention relates to an electrically insulating composite material (1) comprising a polyepoxide matrix (2) of cycloaliphatic type or of diglycidyl ether type in a content of less than 40% by mass, from 20 to 75% by mass of one or several micrometric and/or mesometric filler(s) (3), and from 0.1 to 20% by mass of at least one ionic liquid (4), the masses being expressed relative to the total mass of the electrically insulating composite material (1). The invention also relates to a method for manufacturing such an electrically insulating composite material (1), as well as its use for an electrically insulating support (9) in a metal-enclosed substation (5).

Abstract: Methods for non-destructive testing of engineering materials. In one aspect, a method can be used to calculate residual longitudinal and annular welding stresses in welded joints and can be used to assess the quality of pipeline welds according to the criterion of the level of residual stresses and to determine the initial parameters for the pipeline strength calculation. In some aspects, the method enables independent calculation of the longitudinal and hoop residual stresses. Thus, the stresses can be calculated in the seam metal of the pipelines welds, where they reach their maximum values. The method can be used to test a pipeline section using an ultrasonic echo method to measure the propagation time for longitudinal waves and transverse waves polarized along and across the pipe axis. The measurement results define the distinguishing features of the stress state of a welded joint for a specific type of pipe by numerical modeling.

Abstract: Systems and methods are provided for assessing nasal deviation and symmetry via the processing of facial surface data. Facial surface data may be processed to determine a nasal deviation measure indicative of a lateral deviation between a nasal midline and a facial midplane. The facial surface data may also be processed to determine a measure of nasal symmetry associated with a selected nasal surface region, such as an aesthetic subunit. Nasal deviation and symmetry information based on both measures may then be presented. In some example implementations, a single nasal symmetry measure is generated and present for a given nasal surface region. Reference surface data characterizing a reference symmetrical facial shape and having a defined facial direction relative to a coordinate system may be employed to align the facial surface data prior to the determination of the nasal deviation and nasal symmetry measures.

Abstract: Provided is a method of preparing a three-dimensional cell spheroid, the method including forming the cell spheroid by co-culturing adipose-derived stem cells or mesenchymal stem cells with hepatocytes. According to the cell spheroid prepared by the method, the secretome secreted by the adipose-derived stem cells affects hepatocyte maturation, and therefore, hepatic functions of the finally formed three-dimensional cell spheroid, i.e., organoid, may be enhanced. Further, a composition including a culture medium of the adipose-derived stem cells may prevent or treat liver diseases including hepatitis, hepatotoxicity, cholestasis, fatty liver, etc., and may enhance hepatic functions.

Abstract: A micro-robot operating system using an ultrasonic transducer according to an embodiment of the present invention may comprise: a micro-robot moving in an inspection object; and a micro-robot operating device for controlling the location of the micro-robot. A micro-robot operating device using an ultrasonic transducer may comprise: an ultrasonic transducer unit including a plurality of ultrasonic transducers; and a control unit for controlling the plurality of ultrasonic transducers, wherein the plurality of ultrasonic transducers are arranged to form a curved surface toward a particular location in a space.

Abstract: Disclosed herein are an object recognition apparatus and method based on environment matching. The object recognition apparatus includes memory for storing at least one program, and a processor for executing the program, wherein the program performs extracting at least one key frame from a video that is input in real time, determining a similarity between the key frame extracted from the input video and each of videos used as training data of prestored multiple recognition models, based on a pretrained similarity-matching network, and selecting a recognition model pretrained with a video having a maximal similarity to the key frame extracted from the input video, preprocessing the input video such that at least one of color and size of a video used as training data of an initial model is similar to that of the input video, and recognizing the preprocessed video based on the initial model.

Abstract: A method for controlling temperature of a heating element in an electronic inhaler for vaporizing an aerosol forming substrate. The method includes, in a first stage, applying power to and increasing a temperature of the heating element from an initial temperature to a first temperature; in a second stage, controlling power to decrease the temperature of the heating element from the first temperature to a second temperature; and in a third stage, controlling the heating element to provide a constant temperature operation at the second temperature. During detection of inhalation, power to the heating element is increased to raise its temperature to a third temperature. In the third stage, the heating element increases the temperature only when suction is detected, thereby ensuring that a supply of an aerosol to the inhaler and minimize waste of electric energy and the aerosol forming substrate.