Korea Institute of Science and Technology

Osong Medical Innovation Foundation, Korea University Research and Business Foundation

Doosan Infracore Co., Ltd.

Korea University Industrial Academic Collaboration Foundation

Won-Jun Choi

Jung-il Lee

Q-Han Park

Seong-Il Kim

Won-Shik Choi

Nam-Il Choi

Jae-seong Kim

Eun-Hyoung Kim

Il-Ki Han

Heon-Su Jeon

Jae-Seong Kim

A selective catalytic reduction system includes a reducing agent injection module installed in an exhaust pipe through which an exhaust gas is discharged from an engine and configured to inject a reducing agent into the exhaust pipe, a temperature calculator configured to calculate a temperature of the reducing agent injection module using temperature-related information of the reducing agent injection module, and a temperature controller configured to control to increase a reducing agent injection amount of the reducing agent injection module when the calculated temperature.

Selective catalyst reduction system and method of controlling temperature of reducing agent injection module

A method of enhancing transmittance of waves according to the invention comprises the following steps: (a) generating a plurality of waves each of which has random phase; (b) grouping randomly the plurality of waves into a first group and a second group; (c) introducing the waves onto a disordered medium by fixing phase of waves constituting the first group and varying phase of waves constituting the second group; (d) measuring intensity of the waves based on overlapped waves of the first group and the second group which penetrated the disordered medium according to the phase variation of waves constituting the second group; (e) obtaining phase having the maximum intensity according to the phase variation among intensities measured at the step (d); and (f) adjusting phase of the waves constituting the second group based on phase obtained at the step (e).

Method of enhancing transmission characteristics of waves and device of performing predetermined function by introducing waves onto disordered medium

A film sheet for area-focusing of sunlight and a greenhouse provided with the same are provided. A film sheet includes i) a film having a rectangular shape, and ii) a plurality of prism assemblies formed on one surface of the film to extend in one direction. At least one prism assembly of the plurality of prism assemblies includes i) at least one first prism unit including a plurality of first prisms with slanted angles that are substantially the same as each other, and ii) at least one second prism unit neighboring the first prism unit and including a plurality of second prisms with slanted angles that are substantially the same as each other. The width of the first prism unit is substantially the same as the width of the second prism unit and a slanted angle of one first prism among the plurality of first prisms is different from a slanted angle of one second prism among the plurality of second prisms, and light entering the prism assembly is configured to be area-focused.

Film sheet for area focusing of sun light and greenhouse provided with the same

Disclosed is a polarized light emitting diode (LED) capable of emitting polarized light in the front direction thereof by forming a first grating layer on a quantum well layer and forming a second grating layer on a substrate. The polarized LED includes a nitride thin film formed on a substrate, a quantum well layer formed on the nitride thin film, a first grating layer formed on the quantum well layer to allow a part of light generated from the quantum well layer to pass through the first grating layer and to reflect remaining light, and a second grating layer formed on the substrate to rotate the light reflected from the first grating layer such that the reflected light passes through the first grating layer.

Polarized light emitting diode

Growing community of inventors

Seoul, South Korea

Won-Jun Choi