Abstract: A computer-implemented method of determining backoff windows in a wireless computer network is disclosed. The method comprises defining, by an access point in the wireless computer network, a plurality of collision patterns related to message transmission via one or more communication channels in the wireless computer network; detecting, by the access point, occurrence of one of the plurality of collision patterns involving a group of sender nodes in the wireless computer network that have each transmitted a message to the access point and received no acknowledgement message from the access point indicating successful transmission; setting to a first length a length of a backoff window for avoiding collision in data transmission based on a size of the group of sender nodes; sending a first message to a first plurality of nodes in the wireless computer network, the first message instructing performance of backoff during the backoff window having the first length.

Abstract: An earphone including an audio play portion (30), a body (12) where a printed circuit board (14), a plug (15), and a socket (16) are installed, and a connecting wire (40). The plug (15), the socket (16), and the connecting wire (40) are in electrical connection with the printed circuit board (14). The plug (15) is configured to be adapted to a lightning interface (22) integrated with an audio output and a power input, and the audio play portion (30) and the socket (16) are in electrical connection with the plug (15) and capable of work simultaneously and being respectively configured to play music and charge when the plug (15) is inserted into the lightning interface (22). The earphone utilizes the plug (15) to be adapted to the lightning interface (22) integrated with the audio output and the power input.

Abstract: A roller mop capable of self-cleaning, comprising a pull rod (41), a mop head component (1), and a cleaning basin capable of holding the mop head component (1). The pull rod (41) is grasped by a person to operate; a motor (15) in the mop head component (1) drives a roller (10) to clean the ground; after the mopping is ended, the mop head component (1) can be put in the cleaning basin for charging and washing with water. The roller mop provided with a trash bin (17) can receive a number of small trashes; labor intensity is reduced due to the driving of the motor (15); the mop can perform continuous operation, and thus high cleaning efficiency is achieved; moreover, the mop has a self-cleaning effect, and is easy to use.

Abstract: Provided are a device and method for identifying a paper currency fold. The device includes: a transparent protective body, configured to maintain components in the device to be clean; a laser source, configured to emit laser light a rectangular grating, configured to modulate the laser light into stripes which changes to be bright or dark according to a certain rule on a surface of a paper currency; an area array photoelectric sensor, configured to capture an image; an imaging lens group, configured to converge an image of the surface of the paper currency onto the area array photoelectric sensor; and an information processing module electrically connected with the area array photoelectric sensor, configured to process an image signal captured by the area array photoelectric sensor.

Abstract: Two or more color data can be combined to form a new data source to enhance sensitivity to defocus signal. Defocus detection can be performed on the newly formed data source. In a setup step, a training wafer can be used to select the best color combination, and obtain defocus detection threshold. This can include applying a segment mask, calculating mean intensities of the segment, determining a color combination that optimizes defocus sensitivity, and generating a second segment mask based on pixels that are above a threshold to sensitivity. In a detection step, the selected color combination is calculated, and the threshold is applied to obtain defocus detection result.

Abstract: Provided are ophthalmic devices comprised of a reaction product of a composition comprising: (i) a crosslinked substrate network containing covalently bound activatable free radical initiators; and (ii) a grafting composition containing one or more ethylenically unsaturated compounds. Also provided are processes for making ophthalmic devices.

Abstract: Disclosed is a new method for preparing an azetidinone compound represented by formula (I). The carboxylic ketoester represented by formula (II) serves as the raw material and is subjected to Grignard addition, stereoselective dehydration, ester group reduction, hydroxyl group protection, addition with imine after condensation with a chiral auxiliary, cyclization and deprotection to obtain the compound represented by formula (I). The present invention has advantages of easily available raw material, a few synthetic steps, simple operation, high yield, good stereoselectivity and low cost, and can be used for industrial production.

Abstract: A checking tool for measuring a distance between adjacent sinking grooves in an inner hole of a mechanical part, including: a gage block, end cover, sliding piece, pin, base, pin seat, support, measuring rod, spring, barrel, and dial indicator. An inner end face of the base is provided with the sliding piece, at least three concentric circular arc grooves are on the end face, paired eccentric arc grooves are on the sliding piece, the pin connected to the pin seat runs through the base and sliding piece, which is axially limited by the end cover, and the seat rotates relative to the base to realize radial expansion displacement of the sliding piece. A measuring head is formed by the dial indicator, measuring rod, spring and barrel. By positioning the edges of adjacent sinking grooves in an inner hole, measurement for a distance between the grooves is converted into depth measurement.

Abstract: Embodiments of the present disclosure provide a method and apparatus for driving an electrophoretic display panel, and a display device. The electrophoretic display panel includes a first electrode layer, a second electrode layer, and charged particles distributed between the first electrode layer and the second electrode layer. In the method for driving an electrophoretic display panel, a direct current voltage signal is applied to the first electrode layer to cause the charged particles to move to a predetermined position. An alternating current voltage signal is applied to the first electrode layer to cause the charged particles to oscillate. A data voltage signal is applied to the first electrode layer for display. After the charged particles oscillate, the motion activity can be improved, so that the charged particles may more accurately move according to the data voltage signal, thereby improving display accuracy.

Abstract: Methods and systems are provided for automatically predicting a surface movement path of an aircraft. The method comprises collecting historical aircraft trajectory data from an empirical aircraft path database. Next, aircraft trajectory paths for a designated airport are mapped based on the historical aircraft trajectory data and map data for the designated airport. Different aircraft trajectory paths are each assigned a weight for the designated airport. A graphical display is then generated for each of the aircraft trajectory paths for the designated airport along with a table that identifies a most probable terminal area and entry node for use by the aircraft at the designated airport.

Abstract: The disclosure provides a digital video content security authentication method, wherein the method comprises: a secret information embedding step of selectively modifying a pixel grayscale value for each frame image in a digital video so as to complete the embedding of 1-bit secret information; and a secret information extraction and video authentication step of carrying out secret information extraction from the digital video in which the secret information is embedded according to a key so as to realize the security authentication of the digital video content. The disclosure also provides a digital video content security authentication system. According to the technical scheme provided by the disclosure, the authentication security is improved on the basis of not influencing user experience.

Abstract: Provided herein is a new molecular tool and assay that is useful to quantitatively determine the enzymatic activities of mono-ADP-ribosyltransferases, which are important regulators in various cellular events and implicated in many human diseases, therefore are promising drug targets. The methods of this disclosure enable sensitive and accurate quantify the activities of this group of enzymes and permits establishment of high-throughput screening assays for identification of inhibitors and activators of those enzymes for drug discovery and development.

Abstract: In one example, a method for generating air traffic alerts includes determining a predicted trajectory for a target air-craft, based at least in part on a comparison of information received on a recent trajectory of the target aircraft with a set of procedural trajectory information. The method further includes determining whether a violation of protected airspace is predicted between the target aircraft and an ownship, based at least in part on the predicted trajectory for the target aircraft and a predicted trajectory for the ownship. The method further includes generating an alert output in response to determining that the violation of protected airspace is predicted.

Abstract: A method and associated computer system. A first machine executes machine code in a debugging session on the first machine. The machine code had been previously received by the first machine from a second machine. The machine code includes machine executable instructions. The machine code was generated from compilation of source code developed and compiled on the second machine. In response to a change in the machine code having detected by the first machine in the debugging session on the first machine, the first machine determines a portion of the source code associated with the change in the machine code based on a profile. The profile indicates a mapping between the source code and the machine code. The first machine, while communicating with the second machine, causes the portion of the source code to be updated on the second machine based on the change in the machine code.

Abstract: Disclosed are methods and systems of providing carbon nanotubes decorated with polymer coated metal nanoparticles. Then, annealing the metal coated carbon nanotubes to reduce a quantity of hydrophilic components of the polymer coating.

Abstract: According to at least some embodiments of the present disclosure, a light-emitting diode (LED) chip includes a semiconductor material portion, a transparent conductive layer disposed above the semiconductor material portion, a current blocking layer disposed above the transparent conductive layer, one or more electrodes disposed above the current blocking layer, and a plurality of electron outflow channels that electrically interconnect at least one electrode and the semiconductor material portion across the transparent conductive layer and the current blocking layer.

Abstract: In an approach for generating a file, a computer opens a first file within application software that includes content. The computer receives an indication to generate a second file based on the opened first file and an indication of a file format for the second file. The computer provides a selection window associated with the second file, wherein the selection window is at least partially transparent and at least partially overlays the opened first file. The computer identifies content within the first file that is overlaid by the provided selection window associated with the second file. The computer transfers a copy of the identified content within the first file that is overlaid by the provided selection window associated with the second file.

Abstract: This disclosure describes a user interface (UI) conceptual model and a data model for quickly and easily developing and managing a GUI. The present methods and systems described herein provide for defining one or more UI elements in the UI conceptual model. The one or more UI elements may further reference one or more model objects in the data model. The one or more model objects may include one or more tasks, which may each be mapped to one or more commands for performing each task, or one or more data items, which may each be mapped to rules or conditions for transforming data. According to embodiments, graphics or functionality of a GUI may be easily and efficiently modified by adding, deleting, or modifying UI elements in the UI conceptual model or by adding, deleting, or modifying referenced model objects in the data model, thereby reducing management and development costs.