Abstract: A battery cell is provided. The battery cell includes an electrode assembly including an active material and a foil, a case accommodating the electrode assembly, a cap assembly connected to the case and including a terminal, and a current collecting structure connecting the foil to the terminal.

Abstract: In a method of recovering a lithium precursor, a first electrode including an active material, and a second electrode are prepared. The first electrode and the second electrode are immersed in a first reaction solution in a first reaction vessel and a second reaction solution in a second reaction vessel, respectively. A voltage or a current is applied to the first electrode and the second electrode to recover a lithium precursor from the active material.

Abstract: In a method for recovering lithium hydroxide from a lithium secondary battery, cathode powder is prepared from a cathode of the lithium secondary battery. A cathode active material mixture is prepared by mixing the cathode powder with a calcium compound. The cathode active material mixture is reduced to form a preliminary precursor mixture. A lithium precursor is recovered from the preliminary precursor mixture. Therefore, a lithium precursor can be obtained with high purity without a complicated leaching process or an additional process, which result from a wet-based acid solution process.

Abstract: A semiconductor memory device includes a first stacked structure, a first supporter layer, a second stacked structure, a block cut structure, and a second supporter layer on the second stacked structure and separated by a second cut pattern. The first stacked structure includes a first and second stack, the second stacked structure includes a third stack separated by the block cut structure and a fourth stack, the first supporter layer is on the first stack and the second stack, the second supporter layer is on the third stack and the fourth stack, the first cut pattern includes a first connection on the block cut structure and connecting the first supporter layer and the second stack, and the second cut pattern of the second supporter layer includes a second connection on the block cut structure and connecting the second supporter layer placed on the third stack and the fourth stack.

Abstract: A fluid level measurement system using a buoyant body includes a guide part installed in a direction perpendicular to the bottom surface of a fluid storage tank, and provided with a space in which a fluid can move therein; a buoyant body inserted into the guide part, and configured to float along the surface of the fluid inside the guide part; and a measurement part coupled to the top end of the guide part, and configured to measure the level of the surface of the fluid inside the fluid storage tank by transmitting a signal toward the buoyant body in the inner space of the guide part and then receiving a signal reflected from the buoyant body.

Abstract: The present disclosure relates to a plug connector and a board-to-board connector, and a receptacle connector connected with a plug connector to electrically connect one pair of boards includes: a receptacle housing including: one pair of sidewall portions protruding along both side borders of a bottom portion facing each other; the other pair of sidewall portions protruding along the other both side borders of the bottom portion facing each other and connected with the one pair of sidewall portions; a center protrusion portion protruding from a center of the bottom portion; and a connection recess portion formed between the one pair of sidewall portions and the other pair of sidewall portions, and the center protrusion portion; a plurality of receptacle terminals coupled along insides of the one pair of sidewall portions, each of the receptacle terminals coming into contact with a terminal of the plug connector through a single contact point; and a receptacle metal shell including: fitting nail portions coup

Abstract: A pseudo dual port memory device in which an operating speed is improved and stability is increased is provided. The pseudo dual port memory device may include a memory cell, a pair of bit lines connected to the memory cell, a write driver, a sense amp, and a column multiplexer which is connected to the bit lines, receives a write multiplexer control signal and a read multiplexer control signal, connects the bit lines to the write driver in response to the write multiplexer control signal, and connects the bit lines to the sense amp in response to the read multiplexer control signal. A precharge control signal generation circuit which is connected to the column multiplexer may generate a precharge control signal on the basis of the read and write multiplexer control signals, and a bit line precharge circuit may precharge the bit lines based on the precharge control signal.

Abstract: Provided is a carbon monoxide (CO) dehydrogenase with increased oxygen resistance and/or enzyme activity, specifically, a mutant CO dehydrogenase with increased oxygen resistance and/or enzyme activity by mutating amino acid residues. The CO dehydrogenase may detoxify toxic carbon monoxide at room temperature and pressure by easily oxidizing carbon monoxide and converting the same into carbon dioxide, and may effectively oxidize carbon monoxide even in gas including oxygen. Furthermore, since it is possible to remove carbon monoxide, which is emitted in large quantities in industries such as petrochemical and steel industries, cigarette burning, household cooking, various boilers, and combustion, through cigarette filters, air purifiers, intake filters in household cooking equipment, gas boilers, etc. the CO dehydrogenase may be utilized in various ways.

Abstract: According to an embodiment of the present disclosure, a semiconductor memory device includes a bit line sense amplifier coupled between a pull-up voltage line and a pull-down voltage line, and suitable for sensing a voltage difference between first and second bit lines by sequentially performing a precharge operation, an offset cancellation operation, a charge sharing operation, and an amplification operation, wherein the bit line sense amplifier pre-biases a voltage level of the second bit line depending on a voltage level of the first bit line during the charge sharing operation; and a driving circuit suitable for supplying operating voltages to the pull-up voltage line and the pull-down voltage line during the offset cancellation operation, the charge sharing operation, and the amplification operation.

Abstract: A plug connector according to an embodiment includes: a connector main body which includes one pair of first sidewalls extended in a first direction and facing each other, and one pair of second sidewalls extended in a second direction perpendicular to the first direction, and facing each other; one pair of fitting nails which are coupled to the connector main body; and a plurality of plug terminals which are coupled to the one pair of second sidewalls, wherein each of the one pair of fitting nails includes: an upper surface which is in contact with an upper end of the first sidewall; a central reinforcement portion which is curved downward from the upper surface to come into contact with at least a portion of an outer surface of the first sidewall; and one pair of lateral reinforcement portions which are extended from both ends of the upper surface in the second direction to come into contact with an upper end of the second sidewall, wherein the central reinforcement portion includes a central solder portion

Abstract: A plug connector for a board-to-board connector according to an embodiment includes: a connector main body which includes one pair of first sidewalls extended in a first direction and facing each other, and one pair of second sidewalls extended in a second direction perpendicular to the first direction, and facing each other; one pair of fitting nails which are over-molded in the plug connector; and a plurality of plug terminals which are over-molded on the one pair of second sidewalls, wherein each of the one pair of fitting nails includes: an upper surface contacting an upper end of the first sidewall; a central reinforcement portion which is curved downward from the upper surface to come into contact with at least a portion of an outer surface of the first sidewall; one pair of lateral reinforcement portions which are extended from the upper surface and are curved downward to come into contact with at least portions of respective outer surfaces of the one pair of second sidewalls; and one pair of arm porti

Abstract: According to an embodiment of the present disclosure, a semiconductor memory device includes a bit line sense amplifier coupled between a pull-up voltage line and a pull-down voltage line, and suitable for sensing a voltage difference between first and second bit lines by sequentially performing a precharge operation, an offset cancellation operation, a charge sharing operation, and an amplification operation, wherein the bit line sense amplifier pre-biases a voltage level of the second bit line depending on a voltage level of the first bit line during the charge sharing operation; and a driving circuit suitable for supplying operating voltages to the pull-up voltage line and the pull-down voltage line during the offset cancellation operation, the charge sharing operation, and the amplification operation.

Abstract: The present disclosure relates to a plug connector and a board-to-board connector, and a receptacle connector connected with a plug connector to electrically connect one pair of boards includes: a receptacle housing including: one pair of sidewall portions protruding along both side borders of a bottom portion facing each other; the other pair of sidewall portions protruding along the other both side borders of the bottom portion facing each other and connected with the one pair of sidewall portions; a center protrusion portion protruding from a center of the bottom portion; and a connection recess portion formed between the one pair of sidewall portions and the other pair of sidewall portions, and the center protrusion portion; a plurality of receptacle terminals coupled along insides of the one pair of sidewall portions, each of the receptacle terminals coming into contact with a terminal of the plug connector through a single contact point; and a receptacle metal shell including: fitting nail portions coup

Abstract: This invention relates to a connector, and more specifically, to a shield type connector which reinforces the strength of a housing and an actuator. The shield type connector of this invention includes a housing metal shell made of a metallic material, furnished in the housing in order to reinforce the strength of the housing, and an actuator metal shell made of a metallic material, furnished in the actuator in order to reinforce the strength of the actuator.

Abstract: This invention relates to a connector, and more specifically, to a shield type connector which reinforces the strength of a housing and an actuator. The shield type connector of this invention comprises: a housing metal shell made of a metallic material, furnished in the housing in order to reinforce the strength of the housing; and an actuator metal shell made of a metallic material, furnished in the actuator in order to reinforce the strength of the actuator.

Abstract: Disclosed herein is a connector for contacting a flexible cable with a printed circuit board (hereinafter “PCB”) that enables the connector to contact the flexible cable directly to the PCB without using a terminal as a medium. The connector includes a housing that is fixed to a PCB and forms an insertion space between it and the PCB, where into a flexible cable is inserted; and an actuator mounted rotatably on the housing that pushes downward on the top of the flexible cable inserted into the insertion space so as to put the conductor part of the flexible cable in direct contact with the conductor part of the top of the PCB.

Abstract: The present invention relates to a method for preparing a mutant E. coli strain, capable of simultaneously using glucose and xylose, by genetic engineering and evolutionary adaptation; the mutant E. coli prepared using the same; and a method for producing biofuels, biologically active ingredients, medicinal materials or base chemicals for the chemical industry using the mutant E. coli. Being capable of simultaneously using glucose and xylose, in contrast to wild-type E. coli, the mutant E. coli can be effectively applied to the enzymatic saccharification process of producing biofuels from a biomass.

Abstract: Disclosed herein is a connector for contacting a flexible cable with a printed circuit board (hereinafter “PCB”) that enables the connector to contact the flexible cable directly to the PCB without using a terminal as a medium. The connector includes a housing that is fixed to a PCB and forms an insertion space between it and the PCB, whereinto a flexible cable is inserted; and an actuator mounted rotatably on the housing that pushes downward on the top of the flexible cable inserted into the insertion space so as to put the conductor part of the flexible cable in direct contact with the conductor part of the top of the PCB.

Abstract: The flexible cable mounting structure of the Present Disclosure is a flexible cable connector comprising a housing, whereon a contact terminal is mounted that enables insertion and withdrawal of the flexible cable and contact with the flexible cable. An actuator that opens/closes is installed in such a way as to enable rotation on the housing. A fitting nail is furnished on the housing and fixes the housing to the PCB. The fully-assembled flexible cable connector, wherein the contact terminal, actuator, and fitting nail have each been mounted to the housing, passes through from the bottom to the top of the PCB, and the bottom of the contact terminal and bottom of the fitting nail are soldered to the lower surface of the PCB.

Abstract: The present invention relates to a method for preparing a mutant E. coli strain, capable of simultaneously using glucose and xylose, by genetic engineering and evolutionary adaptation; the mutant E. coli prepared using the same; and a method for producing biofuels, biologically active ingredients, medicinal materials or base chemicals for the chemical industry using the mutant E. coli. Being capable of simultaneously using glucose and xylose, in contrast to wild-type E. coli, the mutant E. coli can be effectively applied to the enzymatic saccharification process of producing biofuels from a biomass.