Abstract: A method and system of recovering data includes reading reference codewords, which have code correlation with a target codeword, from a memory device when an error-correcting code (ECC) decoding process for a decoder input of the target codeword has failed. A decoder input of a corrected target codeword is generated based on an operation process using the target codeword and the reference codewords. An ECC decoding process is performed again on the decoder input of the corrected target codeword.

Abstract: A method of operating a decoder, which has variable nodes and check nodes, includes receiving variable-to-check (V2C) messages from the variable nodes using a first check node among the check nodes. The number of messages having a specific magnitude among the V2C messages is counted. The magnitude of a check-to-variable (C2V) message to be transmitted to a first variable node, among the variable nodes, is determined based on the count value and the magnitude of a V2C message of the first variable node.

Abstract: A hybrid power control apparatus for a vehicle includes an inverter module disposed in a housing; a low DC-DC converter (LDC) module disposed in the housing; and a component mounting part attachably/detachably assembled in the housing. In the hybrid power control apparatus, the inverter module includes a plurality of power modules; a cooler contacts both surfaces of each power module so as to carry out heat conduction, the cooler assembled to the component mounting part; and a capacitor module assembled in a form where the capacitor module is stacked on one side of the cooler so as to carry out heat conduction. As a result of this structure, cooling efficiency can be improved, and the inverter module, the converter module, and a controller are packed in one closed space, thereby reducing the size of the hybrid power control apparatus.

Abstract: A list decoding method for a polar code includes generating a tree-type decoding graph for input codeword symbols; the generating a tree-type decoding graph including, generating a decoding path list to which a decoding edge is added based on a reliability of a decoding path, the decoding path list being generated such that, among decoding paths generated based on the decoding edge, decoding paths within a threshold number of critical paths survive within the decoding path list in an order of high likelihood probability, and determining an estimation value, which corresponds to a decoding path having a maximum likelihood probability from among decoding paths of the decoding path list, as an information word.

Abstract: A robot cleaner which does not stop to change a traveling direction thereof, and a control method thereof includes setting a territory about which cleaning will be performed based on position data acquired during traveling about a cleaning area, predetermining a cleaning path to clean the territory about which cleaning will be performed, and if the cleaning path includes a zigzag traveling path, changing the traveling direction of the robot cleaner by executing curved traveling of the robot cleaner during traveling along the zigzag traveling path, thus decreasing the time required to clean an area during a change of the traveling direction of the robot cleaner.

Abstract: An operating method of an error correction decoder includes receiving data, setting initial log-likelihood values of variable nodes, and decoding the received data by updating a log-likelihood value of a selected variable node by use of a minimum value and a minimum candidate value associated with the selected variable node. The minimum value indicates a minimum value of absolute values of log-likelihood values of first variable nodes sharing a check node with the selected variable node and including the selected variable node. The minimum candidate value indicates one from among absolute values of log-likelihood values of second variable nodes that has the smallest value greater than the minimum value. The second variable nodes are selected later than one from among the first variable nodes corresponding to the minimum value.

Abstract: A cleaning robot includes a non-circular main body, a moving assembly mounted on a bottom surface of the main body to perform forward movement, backward movement and rotation of the main body, a cleaning tool assembly mounted on the bottom surface of the main body to clean a floor, a detector to detect an obstacle around the main body, and a controller to determine whether an obstacle is present in a forward direction of the main body based on a detection signal of the detector, control the rotation of the main body to determine whether the main body rotates by a predetermined angle or more upon determining that the obstacle is present in the forward direction, and determine that the main body is in a stuck state to control the backward movement of the main body if the main body rotates by the predetermined angle or less.

Abstract: A cleaning robot includes a non-circular main body, a moving assembly mounted on a bottom surface of the main body to perform forward movement, backward movement and rotation of the main body, a cleaning tool assembly mounted on the bottom surface of the main body to clean a floor, a detector to detect an obstacle around the main body, and a controller to determine whether an obstacle is present in a forward direction of the main body based on a detection signal of the detector, control the rotation of the main body to determine whether the main body rotates by a predetermined angle or more upon determining that the obstacle is present in the forward direction, and determine that the main body is in a stuck state to control the backward movement of the main body if the main body rotates by the predetermined angle or less.

Abstract: A method of operating a memory device including a plurality of memory cells is provided. The method includes receiving a first write command, determining whether a target memory cell is deteriorated or not, in response to the first write command, and writing the second data by selectively erasing the target memory cell according to a result of the determination and by programming the target memory cell.

Abstract: Provided are an apparatus and method for classifying data and a system for collecting data. The method includes clustering vectors, each of which consists of at least one attribute value, for a plurality of pieces of target data including degrees of class membership and the vectors in view of the degrees of class membership, labeling the plurality of pieces of target data according to a result of the clustering, and generating a classification model using the labeled pieces of target data.

Abstract: Disclosed herein is a cleaning robot including an improved driving unit to escape from an undriveable state occurring under various driving conditions. The cleaning robot includes a body, and a driving unit that drives the body. The driving unit includes a first driving motor and a second driving motor that generate driving power; a driving wheel that rotates when the driving power is delivered to the driving wheel from the first driving motor; and a wheel frame that supports the driving wheel to be rotatable and rotates between a first position and a second position with respect to a motor shaft of the first driving motor. The wheel frame rotates in at least one section between the first position and the second position when the driving power is delivered to the wheel frame from the second driving motor.

Abstract: A cleaning robot includes a main body and a drive unit to move the main body. The drive unit includes a plurality of motors to generate driving force; a plurality of wheels connected to one of the plurality of motors and rotating by driving force received from the one of the plurality of motors; and a driving frame to support the plurality of wheels, receive driving force from another motor among the plurality of motors, and rotate for changing positions of the plurality of wheels.

Abstract: A crosswalk walking assistance system to assist a pedestrian by moving a movable robot along with the pedestrian along a boundary of a crosswalk when the pedestrian crosses at the crosswalk, and a method of controlling the same. The crosswalk walking assistance system includes guide rails formed along boundary lines of a crosswalk, robots moving along the guide rails, and a controller connected to the guide rails.

Abstract: A power conversion module for a vehicle is provided. The module includes a housing and a power conversion unit installed on an inside surface of a bottom panel of the housing. The power conversion unit includes a capacitor module, a power module of an inverter and a LDC. A water-cooling-type cooling unit is installed on an outside surface of the bottom panel of the housing and is in a corresponding position to the power module of the inverter and the LDC, with the bottom panel of the housing interposed therebetween. An air-cooling-type cooling fin is installed on the exterior surface of the bottom panel and is in a corresponding position to a capacitor module, with the bottom panel of the housing interposed therebetween. A radiator blower adjacent to a radiator of a vehicle is configured to generate cooling-air wind to cool the radiator and the air-cooling-type cooling fin.

Abstract: A cleaning robot having improved traveling performance and a method of controlling the same. The cleaning robot detects a stuck state such as a ‘jammed state’, ‘lifted state’, or ‘object-caught state’ by using a motion instruction or sensor information and quickly escapes from the stuck state caused in various traveling conditions by using a wheel structure capable of changing a total height of the cleaning robot. In addition, a degree of risk and type of the stuck state is predicted before the cleaning robot is in the stuck state so that the cleaning robot may deal with the stuck state in advance. The cleaning robot may escape from the stuck state via rapidly deceleration or quick stopping in accordance with the predicted degree of risk of the stuck state, and the cleaning robot may efficiently deal with the stuck state by using information to select an escaping method suitable for the type of the stuck state.

Abstract: A method of operating a memory device including a plurality of memory cells is provided. The method includes receiving a first write command, determining whether a target memory cell is deteriorated or not, in response to the first write command, and writing the second data by selectively erasing the target memory cell according to a result of the determination and by programming the target memory cell.

Abstract: A method of operating a memory system includes receiving information data corresponding to a second program unit that is a part of a first program unit and a write request for the information data from a host; generating a codeword by performing error correction code (ECC) encoding on the received information data such that a partial parity bit corresponding to the information data among all parity bits of the codeword is updated; and providing a memory device with the generated codeword and a write command regarding the codeword.

Abstract: An apparatus and a method for data analysis and prediction, the apparatus including: a data collection unit configured to collect a prediction value derived through a machine learning of input data; a candidate prediction value generation unit configured to generate a candidate prediction value; a rule verification value configured to store one or more rules and verify whether the candidate prediction value violates the one or more rules; and an evaluation unit configured to calculate a fitness of the candidate prediction value according to an error rate of the candidate prediction value with respect to the prediction value and a verification result of the rule verification unit.

Abstract: Disclosed herein are an apparatus for generating a prediction model and a method thereof. The apparatus for generating a prediction model from data composed of a plurality of instances each including one or more predictor values and a target value includes a pre-processing module configured to generate pre-processed target values by calculating weighted averages of the target values for a predetermined prediction period and subtracting the weighted averages from the target values, a prediction model generation module configured to calculate prediction values of the target values of the respective instances from the plurality of instances including the pre-processed target values, and a post-processing module configured to add the weighted averages, which are subtracted in the pre-processing module, to the prediction values of the target values of the respective instances.

Abstract: A method of estimating a deterioration state of a memory device comprises reading data from selected memory cells connected to a selected wordline of a memory cell array by applying to the selected wordline a plurality of distinct read voltages having values corresponding to at least one valley of threshold voltage distributions of the selected memory cells, generating quality estimation information indicating states of the threshold voltage distributions using the data read from the selected memory cells, and determining a deterioration state of a storage area including the selected memory cells based on the generated quality estimation information.