Abstract: The present invention relates to a composition for administering a double-stranded oligonucleotide structure using an ultrasonic nebulizer. According to the method, the double-stranded oligonucleotide according to the present invention forms self-assembled nanoparticles, which are 90 nm in size and have a neutral charge, and it is possible to deliver the double-stranded oligonucleotide specifically to the nasal cavity and lungs while maintaining not only the same concentration, molecular weight, purity, nanoparticle size, and osmolality as those of the stock material but also the target gene inhibitory activity without cytotoxicity. Thus, the present invention may be useful for the prevention or treatment of respiratory viral infections including COVID-19, pulmonary fibrosis caused by viral infection, or respiratory diseases.

Abstract: A roof vent includes a roof disposed on a vehicle and a vent assembly. The vent assembly has at least one vent unit disposed on the roof and configured to enter the roof, a driving unit driving the vent unit, and at least one rack unit applying the driving force of the driving unit to the vent unit. The vent unit enters the roof due to operation of the driving unit.

Abstract: A roof vent includes a roof disposed on a vehicle and a vent assembly. The vent assembly includes at least one vent unit disposed on the roof and configured to be popped up to the interior of the vehicle, a driving unit driving the vent unit, and at least one rack unit applying driving force of the driving unit to the vent unit. The vent unit is popped up or tilted by the driving unit.

Abstract: A roof vent includes a roof disposed on a vehicle and a vent assembly. The vent assembly includes at least one vent unit disposed on the roof and configured to be popped up to the interior of the vehicle, a driving unit driving the vent unit, and at least one rack unit applying driving force of the driving unit to the vent unit. The vent unit is popped up or tilted by the driving unit.

Abstract: A roof vent includes a roof disposed on a vehicle and a vent assembly. The vent assembly has at least one vent unit disposed on the roof and configured to enter the roof, a driving unit driving the vent unit, and at least one rack unit applying the driving force of the driving unit to the vent unit. The vent unit enters the roof due to operation of the driving unit.

Abstract: A vehicle headliner is equipped with an air vent system, which includes a vent base member having a surface which faces a roof panel and on which a roof duct is mounted. The vent base member has multiple vent holes so that a fluid is sprayed toward a vehicle interior. A breathable surface layer is mounted on a surface of the vent base member which is exposed to the vehicle interior. The vent base member may include a polyurethane foam, fiberglass mats, which are attached to both surfaces of the polyurethane foam by glue, respectively, and non-woven fabrics, which are attached through hot melt films to surfaces of the fiberglass mats, respectively, which are opposite to the surfaces attached to the polyurethane foam.

Abstract: A continuous casting machine and method using molten mold flux, wherein the continuous casting machine includes a mold cover for covering an upper portion of a mold; a mold flux melting unit for melting mold flux to be supplied into the mold; and a mold flux delivery unit for supplying the mold with the molten mold flux melted in the mold flux melting unit, wherein the delivery unit includes an injection tube with one end connected to the mold flux melting unit and the other end positioned in the mold through the mold cover, and an injection tube heater for heating the injection tube. Since a slag bear continuous casting machine and method using molten mold flux is removed, the consumption of mold flux is greatly increased compared with the case of a conventional casting work, so that the friction between a mold and a solidified shell is reduced. As a result, an amount of scarfing of a cast piece is greatly reduced and no carbon pick-up occurs.

Abstract: A continuous casting machine injecting molten mold flux into a mold includes: melt-surface covers covering the upper side of the mold; gas aspirators provided below the melt-surface covers for inhaling the gas in an upper space of the mold; and purge gas injectors provided below the melt-surface covers for injecting purge gas into the upper space of the mold.

Abstract: A continuous casting machine injecting molten mold flux into a mold includes: melt-surface covers covering the upper side of the mold; gas aspirators provided below the melt-surface covers for inhaling the gas in an upper space of the mold; and purge gas injectors provided below the melt-surface covers for injecting purge gas into the upper space of the mold.