Abstract: Provided are a negative electrode active material for a secondary battery, which suppresses a dispersal phenomenon of a negative electrode active material during charging/discharging by controlling a lattice mismatch ratio of an amorphous matrix layer to a silicon layer in a silicon-based negative electrode active material.

Abstract: A high-frequency signal predistortion device includes a high-frequency signal estimator, a predistortion estimator, and a predistorter. The high-frequency signal estimator is configured to determine non-linear distortion characteristics of high-frequency signals transmitted by antennas. The predistortion estimator is coupled to the high-frequency signal estimator. The predistortion estimator is configured to determine a predistortion coefficient based on the non-linear distortion characteristics. The predistorter is coupled to the predistortion estimator. The predistorter is configured to distort a base signal of the high-frequency signals based on the predistortion coefficient.

Abstract: The present disclosure is to provide a negative electrode for a lithium secondary battery having high negative electrode efficiency and excellent capacity retention, and a lithium secondary battery including the negative electrode. In one aspect, there is provided a negative electrode for a lithium secondary battery, wherein the electrode contains 3 to 9% by weight of a silicon-based negative-electrode active material having a following composition formula (1); and 87.5 to 95.5% by weight of a graphite-based negative-electrode active material: SixTiyFezAlu??(i) where x, y, z and u are atomic %, x: 1?(y+z+u), y: 0.09 to 0.14, z: 0.09 to 0.14, u: 0.01 exclusive to 0.2 exclusive.

Abstract: Disclosed is a negative active material having a reduced volume change during charge/discharge. A fine crystalline region exists on a matrix of an alloy, and lithium is easily dispersed due to the fine crystalline region. In the negative active material, a ratio of the fine crystalline region is represented by an amorphization degree, and is optimized in designing a battery through a measurement of an expansion rate after 50 cycles. The negative active material is used for a secondary battery and includes an alloy formed by a chemical formula below: (a ratio of Ti to Fe is 1:1 and a ratio of Si:Ti or Si:Fe has a range of 5:1 to 9:1.) Si—?xTiyFezAlu where x, y, z, and u are at %, x: 1?(y+z+u), y: 0.09 to 0.14, z: 0.09 to 0.14, and u: larger than 0.01 and less than 0.2.

Abstract: Disclosed is a continuous rapid solidification apparatus, which comprises a cooling roll configured to cool a molten metal supplied to an outer circumference surface thereof; a crucible configured to supply the cooling roll with the molten metal; and two or more molten metal supplies configured to melt raw material metal and sequentially supply the crucible with the molten metal.

Abstract: Disclosed is a continuous rapid solidification apparatus, which comprises a cooling roll configured to cool a molten metal supplied to an outer circumference surface thereof; a crucible configured to supply the cooling roll with the molten metal; a molten metal supply configured to melt a raw material metal and supply the crucible with the molten metal; a first chamber configured to form a sealed space where the molten metal supplied from the crucible is cooled by the cooling roll; and a second chamber configured to be formed of a space separated from the first chamber and to form a sealed space where the molten metal is supplied to the crucible by the molten metal supply.

Abstract: A high-frequency signal predistortion device includes a high-frequency signal estimator, a predistortion estimator, and a predistorter. The high-frequency signal estimator is configured to determine non-linear distortion characteristics of high-frequency signals transmitted by antennas. The predistortion estimator is coupled to the high-frequency signal estimator. The predistortion estimator is configured to determine a predistortion coefficient based on the non-linear distortion characteristics. The predistorter is coupled to the predistortion estimator. The predistorter is configured to distort a base signal of the high-frequency signals based on the predistortion coefficient.

Abstract: The present invention provides a negative active material for a secondary battery with an improved expansion rate, which is formed by a formula below, and in which an expansion rate of the negative active material after 50 cycles is 70 to 150%, and an amorphization degree on a matrix within an alloy has a range of 25% or more, and Si has a range of 60 to 70%, Ti has a range of 9 to 14%, Fe has a range of 9 to 14%, and Al has a range larger than 1% and less than 20%. Formula: SixTiyFezAlu (x, y, z, and u are at %, x: 1?(y+z+u)).

Abstract: A method of providing an automatic connection service by a server includes: acquiring at least one of state information of an image forming apparatus and state information of a job performed by the image forming apparatus; determining whether the acquired at least one of state information satisfies a performing condition stored in a second server; and if the stored performing condition is satisfied, performing a stored operation in accordance with the stored performing condition.

Abstract: A pin guide for the surgical operation of an avascular necrosis of a femoral head includes a guide body having a central pin guide hole extending along a centerline of the guide body and a plurality of side pin guide holes formed so as to make a specified angle with the central pin guide hole. The side pin guide holes are radially arranged around the central pin guide hole at a front side of the guide body and joined to the central pin guide hole at a rear side of the guide body.

Abstract: An apparatus, system, and method for easily pairing a plurality of client devices, and enabling the paired client devices to easily share content. A cloud server includes: an authentication code generator configured to generate an authentication code that is used for pairing between a control device and a plurality of output devices; a communication unit configured to transmit the generated authentication code to the control device, and to receive an authentication code input to the plurality of output devices; an authentication unit configured to compare the authentication code transmitted to the control device to the authentication code input to the plurality of output devices to perform authentication for the pairing; and a format converter configured to convert a format of content that is to be transmitted to at least one output device of the plurality of output devices into an output format of the at least one output device.

Abstract: A method and apparatus for operating an analog beam is provided. The apparatus includes a hybrid beam-forming structure having a small number of digital chains provided in a digital stage and a signal is transmitted and received in a Time Division Multiple Access (TDMA) scheme. The apparatus includes an analog beam-forming operating unit configured to change the analog beam for a counterpart device for which use of a next frame is to be permitted, upon receiving a request for using the next frame from at least one of multiple devices that transmit and receive signals in units of frames and a communication unit configured to transmit information indicating that the analog beam is changed to permit the use of the next frame by the counterpart device to the multiple devices.

Abstract: A method of providing an automatic connection service by a server includes: acquiring at least one of state information of an image forming apparatus and state information of a job performed by the image forming apparatus; determining whether the acquired at least one of state information satisfies a performing condition stored in a second server; and if the stored performing condition is satisfied, performing a stored operation in accordance with the stored performing condition.

Abstract: The present invention provides a negative active material for a secondary battery with an improved expansion rate, which is formed by a formula below, and in which an expansion rate of the negative active material after 50 cycles is 70 to 150%, and an amorphization degree on a matrix within an alloy has a range of 25% or more, and Si has a range of 60 to 70%, Ti has a range of 9 to 14%, Fe has a range of 9 to 14%, and Al has a range larger than 1% and less than 20%.

Abstract: A pin guide for the surgical operation of an avascular necrosis of a femoral head includes a guide body having a central pin guide hole extending along a centerline of the guide body and a plurality of side pin guide holes formed so as to make a specified angle with the central pin guide hole. The side pin guide holes are radially arranged around the central pin guide hole at a front side of the guide body and joined to the central pin guide hole at a rear side of the guide body.

Abstract: A method and apparatus for operating an analog beam is provided. The apparatus includes a hybrid beam-forming structure having a small number of digital chains provided in a digital stage and a signal is transmitted and received in a Time Division Multiple Access (TDMA) scheme. The apparatus includes an analog beam-forming operating unit configured to change the analog beam for a counterpart device for which use of a next frame is to be permitted, upon receiving a request for using the next frame from at least one of multiple devices that transmit and receive signals in units of frames and a communication unit configured to transmit information indicating that the analog beam is changed to permit the use of the next frame by the counterpart device to the multiple devices.

Abstract: A Ti-based bulk amorphous matrix composite including a composition represented by Formula 1, in at %: TiaZrbBecCudNieMfIg??Formula 1 where M is at least one of Nb and Ta, I is an impurity, and a, b, c, d, e, and f vary within the ranges 38?a?50, 11?b?18, 12?c?20, 6?d?10, 6?e?9, 1?f?20 and 0.01?g?0.5, with a+b+c+d+e+f+g=100.