Abstract: A quantum dot including a core comprising a first semiconductor nanocrystal including a zinc chalcogenide and a semiconductor nanocrystal shell disposed on the surface of the core and comprising zinc, selenium, and sulfur. The quantum dot does not comprise cadmium, emits blue light, and may exhibit a digital diffraction pattern obtained by a Fast Fourier Transform of a transmission electron microscopic image including a (100) facet of a zinc blende structure. In an X-ray diffraction spectrum of the quantum dot, a ratio of a defect peak area with respect to a peak area of a zinc blende crystal structure is less than about 0.8:1. A method of producing the quantum dot, and an electroluminescent device including the quantum dot are also disclosed.

Abstract: An embodiment multi-way coolant valve includes an outer housing including first to third outer inlets, first to third outer outlets, and a pump mount portion coupled to one of the outer outlets, an inner housing rotatably provided within the outer housing and including penetration holes corresponding to the outer inlets and outlets, a coolant line defined by a selective connection of the penetration holes such that the outer inlets and outlets are selectively connected, pads interposed between an interior circumference of the outer housing and an exterior circumference of the inner housing at locations of the outer inlets and outlets, respectively, and a driving device connected to a rotation center of the inner housing to selectively rotate the inner housing within the outer housing, wherein the inner housing is configured to rotate by a preset interval according to a selected vehicle mode.

Abstract: A semiconductor memory device includes a third insulating pattern and a first insulating pattern on a substrate, the third insulating pattern and the first insulating pattern being spaced apart from each other in a first direction that is perpendicular to the substrate such that a bottom surface of the third insulating pattern and a top surface of the first insulating pattern face each other, a gate electrode between the bottom surface of the third insulating pattern and the top surface of the first insulating pattern, and including a first side extending between the bottom surface of the third insulating pattern and the top surface of the first insulating pattern, and a second insulating pattern that protrudes from the first side of the gate electrode by a second width in a second direction, the second direction being different from the first direction.

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: The present disclosure relates to a plurality of host materials and organic electroluminescent devices comprising the same. The present disclosure may provide a plurality of host materials having a composition favorable to thermal denaturation due to a low deposition temperature, while improving hole properties and electronic properties of HOMO and LUMO, by comprising separate compounds represented by formulas 1 and 2 into a light-emitting layer. By comprising the plurality of host materials of the present disclosure, it is possible to provide an organic electroluminescent device having a lower driving voltage, higher luminous efficiency and/or longer lifetime.

Abstract: The present disclosure relates to an organic electroluminescent compound, a plurality of host materials, and an organic electroluminescent device comprising the same. By comprising the compound according to the present disclosure or by comprising a specific combination of compounds according to the present disclosure as a plurality of host materials, it is possible to produce an organic electroluminescent device having improved driving voltage, luminous efficiency, and/or lifetime properties compared to the conventional organic electroluminescent devices.

Abstract: A method for manufacturing a structure for microbe detection comprises the steps of: reacting nitrilotriacetic acid (NTA) and an acid anhydride to prepare a first compound; chelation of metal ions to the first compound to prepare a second compound; binding the second compound and a microbe detector to prepare a third compound; and mixing an exfoliated transition metal-dichalcogenide (TMD) compound and the third compound to prepare a structure for microbe detection, in which the metal ions of the third compound are bound with the transition metal-dichalcogenide compound.

Abstract: A quantum dot including a core that includes a first semiconductor nanocrystal including zinc and selenium, and optionally sulfur and/or tellurium, and a shell that includes a second semiconductor nanocrystal including zinc, and at least one of sulfur or selenium is disclosed. The quantum dot has an average particle diameter of greater than or equal to about 13 nm, an emission peak wavelength in a range of about 440 nm to about 470 nm, and a full width at half maximum (FWHM) of an emission wavelength of less than about 25 nm. A method for preparing the quantum dot, a quantum dot-polymer composite including the quantum dot, and an electronic device including the quantum dot is also disclosed.

Abstract: The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. By comprising the compound according to the present disclosure, an organic electroluminescent device having improved driving voltage, power efficiency and/or lifetime characteristics compared to conventional organic electroluminescent devices can be provided.

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.