Abstract: A vacuum cleaner includes a main body including a fan motor to generate suction force, a suction unit connected to the main body to suction foreign matter from a surface to be cleaned in a state of contacting the surface, a dust collector separatably mounted to the main body to separate and collect dust from air suctioned by the suction unit, and a wheel assembly to move the main body, wherein the wheel assembly includes frames provided at a lower part and left and right sides of the main body and wheels rotatably mounted to the frames provided at the left and right sides of the main body, each wheel having a negative camber angle.

Abstract: A system and method for estimating current in a DC-DC converter are provided that estimate an output current of the DC-DC converter more accurately by correcting an output voltage of a CT sensor at an input terminal as a part of a current map and an efficiency map. The current map and the efficiency map are configured in a 2D form, since the output voltage of the CT sensor varies depending on the PWM duty.

Abstract: An artificial marble chip of the present invention comprises curable resin, metal fiber and/or inorganic fiber, and inorganic filler. The metal fiber and/or inorganic fiber preferably have an average length of about 1 to about 6 mm and an average particle diameter of about 10 to about 15 ?m. An artificial marble according to the present invention is produced by using the artificial marble chip, curable resin matrix, and inorganic filler as main components. The curable resin is preferably selected from acrylic resin, unsaturated polyester resin, epoxy resin, or a copolymer thereof. The artificial marble according to the present invention is produced by the steps of: producing an artificial marble composition by mixing the artificial marble chip, the inorganic filler, and other additives into the curable resin matrix; and curing the composition at about 25 to about 180° C. The invention can also include the step of defoaming the composition prior to curing.

Abstract: The present invention relates to a torsional extreme-plastic processing method. In other words, a processing method in which severe plastic deformation based on torsion and compressive force is applied to a material by using a mold to produce miniaturize and nano-size crystal particles in a conic pipe. According to the severe plastic deformation method of the present invention, a punch that matches an inner shape of the conic metal pipe is mounted inside the conic metal pipe, and then a mold that matches an outer shape of the conic metal pipe is mounted outside the conic metal pipe. Thus, microstructures of the conic metal pipe may be ultra-finely crystallized or nano-crystallized through shearing by applying compression and torsion to the conic metal pipe.

Abstract: Disclosed herein is a system and method for incipient drive of a slow charger for a vehicle. Specifically, an incipient drive entry of the slow charger used when a battery is charged in an electric vehicle (EV) or a plug-in hybrid electric vehicle (PHEV) may be performed. The method includes operating, by a controller, a regulator by outputting a control pilot (CP) signal from electric vehicle supply equipment (EVSE). Additionally, the method includes operating, by the controller, a flip-flop by outputting a driving signal from the regulator and operating a switching mode power supply (SMPS) by outputting a driving signal from the flip-flop. The method further includes resetting, by the controller, the flip-flop by outputting a reset signal from a central processing unit (CPU) turned on by the SMPS.

Abstract: A vacuum cleaner includes a suction body to draw in dust along with air from a surface to be cleaned; a cleaner body having a suction motor; and a cyclone dust collecting apparatus detachably coupled in the cleaner body. The cyclone dust collecting apparatus includes a cyclone unit to form a first current turning in a first direction to separate the dust and the air drawn therein from each other and having a dust outlet to discharge the dust separated from the air; and a dust collecting unit to collect the dust discharged from the dust outlet. The dust outlet has a side formed adjacent to an inner wall of the dust collecting unit to form a second current turning in a second direction opposite to the first direction to allow the dust discharged through the dust outlet to whirl along the inner wall of the dust collecting unit.

Abstract: A method of managing a memory in an electronic device is provided that includes calculating an indication of remaining life of a memory component that is used as a swap space by the electronic device; and adjusting the use of the memory component as a swap space based on the indication of remaining life, wherein the adjusting includes one of: (i) reducing a rate at which data is swapped in and out of the memory component, and (ii) discontinuing the use of the memory component as a swap space.

Abstract: The present invention relates to a method and system to provide service information to a portable terminal based on the location information associated with the portable terminal. The service information providing method is performed in such a way that a server acquires location information associated with the portable terminal and service information corresponding to the location information. The portable terminal may acquire and store the service information from the server. The portable terminal user can also identify new service information regarding a place where the user is located.

Abstract: A transconductance amplifier having an input terminal for receiving an input signal and an output terminal for communicating an output signal based on the input signal, the transconductance amplifier may include a gain transistor and a variable capacitance. The gain transistor may have a gate terminal, a first non-gate terminal, and a second non-gate terminal, the first non-gate terminal coupled to the output terminal of the transconductance amplifier. The variable capacitance may be coupled between the gate terminal of the gain transistor and the second non-gate terminal of the gain transistor.

Abstract: Disclosed is a preparation method for a composite which comprises the following steps: (a) preparing unit metal pieces comprising two or more types of different metals; (b) circumferentially arranging the two or more types of unit metal pieces in a mold comprising upper and lower dies; (c) applying compressive stress to the loaded metal pieces using the upper and lower dies; and (d) rotating the upper and lower dies in one or two directions to apply torque in the pressed state.

Abstract: A method and systems for providing and processing images of a virtual world scene. The method includes: rendering the scene of the virtual world to generate a plurality of rendering results, generating at least one image stream based on at least part of the plurality of rendering results, and sending the at least one image stream to the client. The system for providing the images includes: rendering means to generate a plurality of rendering results; image stream generation means for generating at least one image stream; and sending means for sending said at least one image stream to a client. After providing the images, the images are processed by receiving means for receiving, at a client, two image streams and merging means for merging the two image streams into a single image stream for playing.

Abstract: Disclosed are a holographic image display device and a method for driving the same which may stabilize luminance of a holographic image and reduce flicker. The holographic image display device includes a laser backlight unit, a surface light converter converting laser light emitted from the laser backlight unit into surface light-type laser light and emitting the surface light-type laser light, a spatial light modulator (SLM) implementing an input holographic interference pattern and projecting a holographic image at a viewing point using the surface light-type laser light, and an optical switching unit located between the laser backlight unit and the SLM and controlling polarization of the laser light. The optical switching unit blocks laser light emitted to the SLM in a blocking mode, and transmits the laser light emitted to the SLM in a transmission mode.

Abstract: A method for operating a device in a wireless communication system supporting Device to Device (D2D) communication system includes receiving a reference signal from each of at least one transmitting device, estimating a frequency offset between the reference signals and a comparison reference signal corresponding to the reference signals, and adjusting a transmit frequency of a voltage controlled oscillator of the device using the estimated frequency offset estimation. An apparatus for compensating for a frequency offset of a device in a wireless communication system supporting Device to Device (D2D) communication system includes a frequency offset estimator configured to receive reference signals from each of at least one transmitting device, and estimating a frequency offset between the reference signals and a comparison reference signal corresponding to the reference signals, and a voltage controlled oscillator configured to adjust a transmit frequency using the estimated frequency offset.

Abstract: Described embodiments relate to a machine to machine (M2M) server for controlling a data collection interval of a M2M device. The M2M server may be configured to determine data dependency between a first M2M device and a second M2M device based on sensing data collected from the first M2M device and the second M2M device and to control a data collection interval of at least one of the first M2M device and the second M2M device based on sensing data variation of one of the first M2M device and the second M2M device.

Abstract: The disclosure is related to an interworking procedure between a social media service (e.g., a social network service) and a machine to machine (M2M) service. More specifically, the interworking procedure may be performed based on location information (e.g., a location of user equipment).

Abstract: Provided are a method and apparatus for detecting an abnormal movement. The apparatus includes a feature tracing unit configured to extract features of a moving object in an input image, trace a variation in position of the extracted features according to time, and ascertain trajectories of the extracted features; a topic online learning unit configured to classify the input image in units of documents which are bundles of the trajectories, and ascertain probability distribution states of topics, which constitute the classified document, by using an online learning method which is a probabilistic topic model; and a movement pattern online learning unit configured to learn a velocity and a direction for each of the ascertained topics, and learn a movement pattern by inferring a spatiotemporal correlation between the ascertained topics.

Abstract: A nonvolatile memory system comprises a temporary power supply that supplies power in the event of an unexpected power interruption. The temporary power supply provides power while metadata stored in one or more buffers is compressed and transferred to a nonvolatile memory device.

Abstract: A photoelectric device and a photoelectric system including the same are provided. The photoelectric device includes a photoelectric module configured to perform photoelectric conversion and a cover glass facing the photoelectric module and having a receiving space that receives the photoelectric module. The cover glass includes a plate-shaped base part formed to face a main surface of the photoelectric module and a sidewall protruding from an edge of the base part to face a side section of the photoelectric module.

Abstract: Provided is a reaction force compensation device capable of compensating for a reaction force caused by a motor that is continuously rotating. The reaction force compensation device is configured to compensate for a reaction force generated when a motor including a stator and a rotor, which is combined with the stator to be rotatable, is driven, and includes a housing disposed below the motor, and a rotation support member disposed between the housing and the rotor and configured to support the stator to be rotatable with respect to the housing. The stator rotates by a reaction force generated when the rotor rotates.

Abstract: A display panel provided with light from a backlight unit, the display panel including: an upper substrate; a lower substrate disposed to face the upper substrate; a liquid crystal layer disposed between the upper substrate and the lower substrate; a lower polarizing layer formed on one surface of the lower substrate and polarizing-filtering the light from the backlight unit; an upper polarizing layer formed on one surface of the upper substrate and polarizing-filtering the light passing through the liquid crystal layer; and a color filter layer formed on one surface of the lower substrate and the upper substrate and filtering light so that lights of a plurality of preset colors are emitted, wherein each of the lower polarizing layer, the upper polarizing layer, and the color filter layer comprises a linear pattern.