Abstract: An embodiment of the present disclosure provides an apparatus for immobilizing a microbial cell, the apparatus including: a mixing tank in which a cell-carrier-containing mixed solution is accommodated; a nozzle part through which the cell-carrier-containing mixed solution is injected from the mixing tank and is discharged to the outside; and a reaction tank in which a cell immobilized bead is formed by contact between the cell-carrier-containing mixed solution discharged from the nozzle part and an aqueous curing agent solution. In the apparatus for immobilizing a microbial cell according to the present disclosure, since the cell-carrier-containing mixed solution is injected through an air spraying nozzle, even when an immobilized carrier solution having a high viscosity is used, a microbial cell immobilized bead having a small size and having a spherical shape, or an almost spherical shape may be mass-produced.

Abstract: Disclosed is a method of calculating a thickness of an ultra-thin film having a nm-order thickness based on measuring a thickness of each of ultra-thin films having different thicknesses by using a first thickness measurement method with length-unit traceability and separately measuring the thickness of each of the ultra-thin films having different thicknesses by using a second thickness measurement method with offset traceability.

Abstract: Disclosed is a method of calculating a thickness of an ultra-thin film having a nm-order thickness based on measuring a thickness of each of ultra-thin films having different thicknesses by using a first thickness measurement method with length-unit traceability and separately measuring the thickness of each of the ultra-thin films having different thicknesses by using a second thickness measurement method with offset traceability.

Abstract: An embodiment of the present disclosure provides an apparatus for immobilizing a microbial cell, the apparatus including: a mixing tank in which a cell-carrier-containing mixed solution is accommodated; a nozzle part through which the cell-carrier-containing mixed solution is injected from the mixing tank and is discharged to the outside; and a reaction tank in which a cell immobilized bead is formed by contact between the cell-carrier-containing mixed solution discharged from the nozzle part and an aqueous curing agent solution. In the apparatus for immobilizing a microbial cell according to the present disclosure, since the cell-carrier-containing mixed solution is injected through an air spraying nozzle, even when an immobilized carrier solution having a high viscosity is used, a microbial cell immobilized bead having a small size and having a spherical shape, or an almost spherical shape may be mass-produced.

Abstract: An advertising system includes a first terminal to transmit an advertisement receipt consent signal; and an advertising server to store a list of advertisements, to provide one or more advertisements from the list of advertisements to be selected, and to provide a selected advertisement to the first terminal. A method for selectively providing an advertisement includes transmitting an advertisement receipt consent signal from a first terminal; selecting an advertisement from a list of advertisements; and providing the selected advertisement to the first terminal.

Abstract: The present disclosure suggests a method of manufacturing flake aluminum oxide using a microwave including: performing a pre-treatment on a starting material by grinding the starting material such as alumina hydrate, aluminum salt or the like and classifying particles with an appropriate size; manufacturing transition alumina by performing a heat treatment by means of heating the pre-treated starting material; mixing the transition alumina with molten salt and an additive and then dispersing and grinding the mixed compounds; melting and synthesizing flake aluminum oxide by heating the dispersed and grinded mixture with a microwave as a heating source; separating the molten salt and the additive from the synthesized aluminum oxide; and performing a post-treatment on the flake aluminum oxide by removing a foreign substance such as an additive residue stuck to a surface of a crystal particle of the separated flake aluminum oxide.

Abstract: The present disclosure suggests a method of manufacturing flake aluminum oxide using a microwave including: performing a pre-treatment on a starting material by grinding the starting material such as alumina hydrate, aluminum salt or the like and classifying particles with an appropriate size; manufacturing transition alumina by performing a heat treatment by means of heating the pre-treated starting material; mixing the transition alumina with molten salt and an additive and then dispersing and grinding the mixed compounds; melting and synthesizing flake aluminum oxide by heating the dispersed and grinded mixture with a microwave as a heating source; separating the molten salt and the additive from the synthesized aluminum oxide; and performing a post-treatment on the flake aluminum oxide by removing a foreign substance such as an additive residue stuck to a surface of a crystal particle of the separated flake aluminum oxide.

Abstract: A leak sensor and a leak sensing system are provided. The leak sensor preferably includes a fluid sensing member that is capable of sensing and indicating the presence of a fluid leaked from a fluid storage or transport member. The leak sensor further preferably includes at least two wires communicating with the fluid sensing member. The wires are preferably configured to be short-circuited when they contact the fluid leaked from the fluid storage or transport member. An electrical signal corresponding to a leak sensor location can thereby be sent to a control terminal of the leak sensing system. A portion of the wires may be arranged in a cable coated with a protective material such as Teflon®. The control box (or terminal) preferably receives electrical signals from a plurality of leak sensors. The electrical signals can provide information on whether the fluid has leaked and on which leak sensor or sensors have detected the fluid leak.

Abstract: A leak sensor and a leak sensing system are provided. The leak sensor preferably includes a fluid sensing member that is capable of sensing and indicating the presence of a fluid leaked from a fluid storage or transport member. The leak sensor further preferably includes at least two wires communicating with the fluid sensing member. The wires are preferably configured to be short-circuited when they contact the fluid leaked from the fluid storage or transport member. An electrical signal corresponding to a leak sensor location can thereby be sent to a control terminal of the leak sensing system. A portion of the wires may be arranged in a cable coated with a protective material such as Teflon. The control box (or terminal) preferably receives electrical signals from a plurality of leak sensors. The electrical signals can provide information on whether the fluid has leaked and on which leak sensor or sensors have detected the fluid leak.