Abstract: A method for carbonizing a polymer and a graphite prepared by the method are disclosed. The method includes a stabilization treatment operation of treating a polyolefin-based polymer with an acid solution containing at least one of hydrochloric acid, nitric acid, or a combination thereof. The method also includes a carbonization treatment operation of carbonizing the stabilized polymer at a temperature within a range of 400 to 3350° C. The graphite obtained therefrom is soft carbon.

Abstract: Disclosed are a composite fiber (MXene composite fiber) and a manufacturing method thereof. The composite fibers are manufactured by braiding a MXene-PAN fiber heat-treated with a polymer fiber. The method includes preparing a first dispersion including an MXene compound and a first solvent, preparing a second dispersion including polyacrylonitrile (PAN) and a second solvent, obtaining an admixture including the first dispersion and the second dispersion, obtaining a spun fiber by performing wet-spinning of the admixture, obtaining an MXene-PAN fiber by performing heat treatment of the spun fiber, and obtaining the MXene composite fiber by braiding the MXene-PAN fibers with a polymer fiber. An electrical conductivity of the MXene-PAN fiber is about 0.1 Scm?1 to 1,000 Scm?1.

Abstract: Provided is an X-ray image apparatus. The X-ray imaging apparatus include an imaging body and a control circuit. The image body acquires X-ray image data of an object and includes an X-ray generation device and an X-ray sensing device. The X-ray generating device and the X-ray sensing device are disposed to face each other with the object in between. The control circuit reconfigures an X-ray image of the object based on the X-ray image data, acquire size information of the object, rotate the X-ray generation device and the X-ray sensing device about a rotation axis between the X-ray generation device and the X-ray sensing device, and move the object along a direction of the rotation axis with respect to the X-ray generation device and the X-ray sensing device when acquiring the X-ray image data.

Abstract: A power conversion device for controlling a DC voltage of a DC link may comprise a first diode, a second diode, a first switching element, a second switching element, a third switching element, and a fourth switching element, wherein: a cathode terminal of the first diode is connected to a positive terminal of the DC link; an anode terminal of the first diode is connected to one end of the first switching element and one end of the third switching element; the other end of the first switching element is connected to an alternating current terminal and one end of the second switching element; the other end of the second switching element is connected to one end of the second diode and one end of the fourth switching element; the other end of the second diode is connected to a negative terminal of the DC link.

Abstract: Provided is a composite heating film. The composite heating film includes conductive sheets stacked in a layered structure. Metal/metal oxide composite particles intercalated between neighboring conductive sheets among the conductive sheets are positioned. The composite heating film can generate heat with high efficiency even at a low operating voltage and can be used as a portable heating unit due to having a light weight.

Abstract: The present invention relates to a recombinant microorganism imparted with increased ability to produce glutaric acid by further introducing a gene encoding a polypeptide having glutaric acid transporter activity into a microorganism having ability to produce glutaric acid, and to a method of preparing glutaric acid using the recombinant microorganism. According to the present invention, glutaric acid used for the preparation of various compounds such as polyamide, polyurethane, 1,5-pentanediol, and 5-hydroxyvaleric acid can be biosynthesized at high yield.

Abstract: Disclosed is a composite fiber including a substrate and a MXene disposed inside the substrate. The substrate contains a polymer and has a fiber shape. Since the MXene content is controlled to be in an optimum range, the mechanical properties, mechanical stability, and oxidation stability of the composite fiber are maximized.

Abstract: A power conversion device for controlling a DC voltage of a DC link may comprise a first diode, a second diode, a first switching element, a second switching element, a third switching element, and a fourth switching element, wherein: a cathode terminal of the first diode is connected to a positive terminal of the DC link; an anode terminal of the first diode is connected to one end of the first switching element and one end of the third switching element; the other end of the first switching element is connected to an alternating current terminal and one end of the second switching element; the other end of the second switching element is connected to one end of the second diode and one end of the fourth switching element; the other end of the second diode is connected to a negative terminal of the DC link.

Abstract: Provided are a monitoring device and method. A monitoring device includes a laser processor configured to emit a processing laser beam to perform a melting annealing process on a wafer; a laser monitor configured to emit a monitoring laser beam onto the wafer while the laser processor performs the melting annealing process, the laser monitor configured to measure reflectivity of the wafer; and a data processor configured to process data on the reflectivity measured by the laser monitor, and monitor one or more characteristics of the wafer based on the data on the reflectivity.

Abstract: A simulation method and simulator for a system including a plurality of microring resonators, where the simulation method includes converting the plurality of microring resonators into an equivalent model, generating a virtual system including the equivalent model, inputting an input signal to the virtual system, and outputting an output signal from the virtual system.

Abstract: A method of manufacturing a graphene fiber is provided. The method includes preparing a source solution including graphene oxide, supplying the source solution into a coagulation solution to form a graphene oxide fiber, reducing the graphene oxide fiber to form a primary graphene fiber, and Joule-heating the primary graphene fiber to form a secondary graphene fiber.

Abstract: A method of manufacturing a graphene fiber is provided. The method includes preparing a source solution including graphene oxide, supplying the source solution into a base solution containing a foreign element to form a graphene oxide fiber, separating the graphene fiber from the base solution and cleaning and drying to obtain the graphene oxide fiber containing the foreign element, and performing thermal treatment to the dried graphene oxide fiber containing the foreign element to form a graphene fiber doped with the foreign element. Elongation percentage of the graphene fiber is adjusted by concentration and spinning rate of the source solution.

Abstract: MXene fibers and a preparation method thereof are provided. The method for preparation of a MXene fiber comprises preparing a dope solution in which MXene sheets are dispersed in a polar solvent, extruding the dope solution into a coagulating solution to coagulate the extruded dope solution to change into a MXene gel fiber, and drying the MXene gel fiber and converting it into the MXene fiber.

Abstract: A method of quantifying a size of a tissue of interest in a animal through a device including a storage, an image processor, and a display by using an X-ray image of the animal is proposed. The proposed method may include storing the X-ray image in the storage, displaying the X-ray image on the display, performing, by the image processor, processes of (i) calculating a reference value for a length of a reference tissue of the animal displayed on the X-ray image, (ii) calculating a value of a length in at least one specific direction of the tissue of interest of the animal displayed on the X-ray image, and (iii) quantifying the size of the tissue of interest as a ratio of the value of the length to the reference value, and displaying the quantified size of the tissue of interest on the display.

Abstract: The present invention relates to a recombinant microorganism imparted with increased ability to produce glutaric acid by further introducing a gene encoding a polypeptide having glutaric acid transporter activity into a microorganism having ability to produce glutaric acid, and to a method of preparing glutaric acid using the recombinant microorganism. According to the present invention, glutaric acid used for the preparation of various compounds such as polyamide, polyurethane, 1,5-pentanediol, and 5-hydroxyvaleric acid can be biosynthesized at high yield.

Abstract: Disclosed is a method of operating a non-volatile memory device. A method of operating a non-volatile memory device according to an embodiment of the present disclosure, in a method of operating a non-volatile memory device including a log storage area, a data storage area, and an ACK generation unit, may include receiving a log and data from a cache memory, storing the received log in the log storage area, storing the received data in the data storage area, and transmitting an ACK signal to the cache memory according to a result of storing the log and the data.

Abstract: Provided are a monitoring device and method. A monitoring device includes a laser processor configured to emit a processing laser beam to perform a melting annealing process on a wafer; a laser monitor configured to emit a monitoring laser beam onto the wafer while the laser processor performs the melting annealing process, the laser monitor configured to measure reflectivity of the wafer; and a data processor configured to process data on the reflectivity measured by the laser monitor, and monitor one or more characteristics of the wafer based on the data on the reflectivity.

Abstract: Proposed is an X-ray imaging apparatus including an imaging body configured to include an X-ray generation module and an X-ray sensing module that face each other with an object in between and acquire X-ray image data, an image formation module configured to reconfigure an X-ray image of the object on the basis of the X-ray image data, a size information acquisition module configured to acquire size information on the object using the X-ray image, and a control module configured to rotate the X-ray generation module and the X-ray sensing module about a rotation axis between the X-ray generation module and the X-ray sensing module and relatively move the object along a direction of the rotation axis with respect to the X-ray generation module and the X-ray sensing module when capturing the X-ray image, wherein the control module controls a relative moving speed of the object on the basis of the size information.

Abstract: Provided are a monitoring device and method. A monitoring device includes a laser processor configured to emit a processing laser beam to perform a melting annealing process on a wafer; a laser monitor configured to emit a monitoring laser beam onto the wafer while the laser processor performs the melting annealing process, the laser monitor configured to measure reflectivity of the wafer; and a data processor configured to process data on the reflectivity measured by the laser monitor, and monitor one or more characteristics of the wafer based on the data on the reflectivity.

Abstract: A task mapping method of a NoC semiconductor device includes assigning a first task of a plurality of tasks for node control of the NoC semiconductor device to a first node of a first chip; computing tag values of second tasks of the plurality of tasks which are not assigned to the first node; and assigning the second tasks to a second node according to the tag values.