Korea Institute of Science and Technology

O Chang Kwon

Myoung-Woon Moon

Heon Ju Lee

Do Hyun Kim

Young A Lee

Tae Jun Ko

Seong Jin Kim

Ho-Young Kim

Myoung Woon Moon

Kyu Hwan Oh

Kwang Ryeol Lee

Hyungmin Park

Wonjin Jo

Seo Hyun Cho

Seohyun Cho

A sound absorption structure and a method of manufacturing the same are provided. The sound absorption structure includes a first sound absorption layer comprising first elements of which longitudinal directions are misaligned in a thickness direction of the sound absorption structure, the first sound absorption layer having a first internal filling density and absorbing sound waves of a first reactance frequency; and a second sound absorption layer disposed on the first sound absorption layer, having a second internal filling density different from the first internal filling density, and absorbing sound waves of a second reactance frequency different from the first reactance frequency.

Sound absorption structure and method of manufacturing the same

The present disclosure relates to a rotating type foreign substance collection equipment, and according to an embodiment of the present disclosure, there is an effect in separating and collecting foreign substances such as oil from foreign substance-fluid mixtures at high speeds by the separation membrane that traps foreign substances such as oil that float in water while allowing sea water or river water to pass through and be discharged.

Rotating type foreign substance collection equipment

Disclosed is a hydrophilic material oil fence having a double-porous mesh. The hydrophilic material oil fence having the double-porous mesh includes a floating body floating on a water surface, and a skirt coupled to an upper portion and a lower portion of the floating body and made of a hydrophilic material through which a hydrophilic fluid selectively passes. A mesh hole size of a partial region of the skirt and a mesh hole size of the other region of the skirt are different.

Hydrophilic material oil fence having double-porous mesh

An oil fence including an oil filtration membrane includes: a floating member floating on a surface of water; and an oil filtration membrane connected to the floating member, allowing the water to pass therethrough, and rapidly collecting materials such as oil or a hazardous and noxious substance included in the water.

Oil fence with oil filtration membrane

An oil-collecting apparatus includes: a body including an inlet through which a liquid is introduced, a first outlet through which purified water generated from the liquid introduced through the inlet is discharged, and a second outlet through which materials collected from the liquid are discharged; and a filter arranged at the first outlet of the body and generating the purified water by collecting the materials included in the liquid by allowing the liquid introduced through the inlet to pass therethrough.

Oil collecting apparatus and oil collecting system having the same

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Seoul, South Korea

O Chang Kwon