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 method of mounting a bus-bar frame includes: forming a plurality of cell lead blocks and a battery cell stacked body by alternately stacking a cell lead block and at least one battery cell; disposing a top cover with respective ends on which a bus-bar frame is installed so as to cover the battery cell stacked body; removing the lead blocks from a space between the battery cell stacked body and the bus-bar frame; and installing the bus-bar frame on the battery cell stacked body by rotating the bus-bar frame. The alternately stacking of the cell lead block and the at least one battery cell includes positioning an electrode lead protruding from each battery cell between neighboring ones of the cell lead blocks.

Abstract: A substrate processing apparatus includes a photoresist coater applying a photoresist film on a substrate, a humidifier increasing an amount of moisture in an ambient to which the photoresist film on the substrate is exposed, and an exposer irradiating the photoresist film exposed to the ambient having the increased amount of moisture with light. The humidifier is disposed between the photoresist coater and the exposer.

Abstract: The present invention relates to a composition for preventing hearing loss, containing mesenchymal stem cells (MSC) or exosomes derived therefrom as an active ingredient. Specifically, an effect of preventing damage to the inner hair cells and outer hair cells of the cochlea caused by ototoxic drugs is exerted since a large amount of HSP70 protein is contained in exosomes contained in an MSC culture solution obtained according to the present invention, MSCs co-cultured with cochlear explants according to the present invention, and exosomes contained in a co-culture solution of MSCs and cochlear explants, and thus the MSCs co-cultured with cochlear explants, culture solution, and exosomes isolated therefrom can be usefully utilized as an active ingredient of a composition for preventing hearing loss.

Abstract: The present invention relates to an animal model for age-related hearing loss (ARHL) and a method for preparing the same, particularly to a method for preparing an animal model for hearing loss, which comprises feeding a high fat diet to an animal and injecting galactose to the animal in intermittent hypoxia to age and damage the auditory organ in a short period of time, and an animal model prepared by the preparation method.

Abstract: The present disclosure relates to a device that can guide perpendicular drilling and simultaneously measure flatness of an insertion surface through a locking protrusion by rotating the device in bone conduction implantation. According to the present disclosure, it is possible to measure flatness and guide perpendicular boring with a constant force even without using a separate flatness measurer in surgery. Further, it is also possible to guide drilling using a spacer having a smaller diameter by using an assistant guide member.

Abstract: There is provided a VR-based portable nystagmus test apparatus that provides both a three-dimensional stereoscopic image and a voice to a subject such that efficiency and accuracy of a follow-up examination can be enhanced. The VR-based portable nystagmus test apparatus can enhance the accuracy and efficiency of an examination by inducing the subject to make a correct motion, during the examination on the subject who wears the VR-based portable nystagmus test apparatus.

Abstract: A server for managing data, according to various embodiments, may comprise: communication circuitry for receiving a data request from at least one electronic device; a cache for storing a plurality of update data according to an update time; and a processor for, when the data request is received from the electronic device, searching the cache for update data for a first period starting from a previous data request time to the time of receiving the data request, and transmitting at least one updated data of the first period to the electronic device.

Abstract: A portable nystagmus examination device includes: a main body which is provided in the form of goggles and comes into contact with the face of a subject so that the visual field of the subject is blocked from the outside; a camera unit which is provided on the inner side of the main body and captures eyeball image information on the subject; a monitor unit which is provided on the outer side of the main body and displays, to a user, the eyeball image information on the subject captured through the camera unit; and a control unit which is provided in the main body, collects the eyeball image information on the subject captured by the camera unit, and controls the monitor unit to output the eyeball image information. Thus, the user can perform the nystagmus examination regardless of a place.

Abstract: A server for managing data, according to various embodiments, may comprise: communication circuitry for receiving a data request from at least one electronic device; a cache for storing a plurality of update data according to an update time; and a processor for, when the data request is received from the electronic device, searching the cache for update data for a first period starting from a previous data request time to the time of receiving the data request, and transmitting at least one updated data of the first period to the electronic device.

Abstract: Provided is a portable nystagmus examination device including: a main body 10 which is provided in the form of goggles and comes into contact with the face of a subject so that the visual field of the subject is blocked from the outside; a camera unit 20 which is provided on the inner side of the main body 10 and captures eyeball image information on the subject; a monitor unit 30 which is provided on the outer side of the main body 10 and displays, to a user, the eyeball image information on the subject captured through the camera unit 20; and a control unit 40 which is provided in the main body 10, collects the eyeball image information on the subject captured by the camera unit 20, and controls the monitor unit 30 to output the eyeball image information. Thus, the user can perform the nystagmus examination regardless of a place.

Abstract: Provided are a photoresist coating apparatus and a method of coating photoresist using the same. The apparatus includes a photoresist supply line through which photoresist is supplied. A fluid control valve is connected to the photoresist supply line to control the flow of the photoresist. A nozzle assembly is connected to the photoresist supply line at a rear end of the fluid control valve. The nozzle assembly includes a nozzle located above the center of a semiconductor wafer loaded in a photoresist coating unit to spray the photoresist. A camera is located outside the photoresist coating unit to monitor the shape or spraying amount of the nozzle located at the tip of the nozzle assembly. A controller converts data monitored by the camera into an electric signal and processes the electric signal.

Abstract: Provided are a photoresist coating apparatus and a method of coating photoresist using the same. The apparatus includes a photoresist supply line through which photoresist is supplied. A fluid control valve is connected to the photoresist supply line to control the flow of the photoresist. A nozzle assembly is connected to the photoresist supply line at a rear end of the fluid control valve. The nozzle assembly includes a nozzle located above the center of a semiconductor wafer loaded in a photoresist coating unit to spray the photoresist. A camera is located outside the photoresist coating unit to monitor the shape or spraying amount of the nozzle located at the tip of the nozzle assembly. A controller converts data monitored by the camera into an electric signal and processes the electric signal.