Center for Advanced Meta-materials

Other

Pusan National University

Kyung Jun Song

Hak Joo Lee

Jun Hyuk Kwak

Jong Jin Park

Jong Min Lee

Young Kee Shin

Shin Hur

Ji-Hye Yang

Joong S Song

Jun Ho Jeong

Jae Ho Jin

Young Seok Song

Ji Tai Kim

Jerng S Song

Ho CHul Yoon

Moon Kyoung So

Ji Uk Yoo

Ji Soo Ahn

Tae Ho Byun

Han Kyu Oh

A cover unit includes: a body to which an ultrasound generator adapted to generate ultrasound is coupled; first slits disposed at a lower portion of the body in the form of multiple rings having different radii and spaced apart from each other, the first slits having a first width; second slits depressed from an upper surface of the body to communicate with the first slits and having a second width smaller than the first width; third slits depressed from the upper surface of the body and each disposed between adjacent second slits, the third slits having a third width smaller than the first width; a bottom formed under the first slits; a first sidewall formed between adjacent first slits; and a second sidewall formed between the second slit and the third slit.

Cover unit of ultrasonic transducer

Disclosed is an ultrasonic wave transmission structure which is provided on a path of ultrasonic waves to amplify incident ultrasonic waves. The ultrasonic wave transmission structure includes: multiple rings each provided with a body portion having a different radius from other body portions and spaced apart from another body portion adjacent thereto and a slit disposed between adjacent body portions; and a membrane disposed in the multiple rings, wherein the mass of the membrane is adjusted to vary a resonant frequency in multiple sub-membrane regions.

Ultrasonic transmission structure

An embodiment of the present invention provides an ultrasonic wave amplifying unit which can improve ultrasonic power in air, wherein the ultrasonic wave amplifying unit includes multiple rings having a concentric axis and each having a first width, and a slit having a second width is formed between the rings and an air layer is formed between the multiple rings and an ultrasonic wave generator generating ultrasonic waves or a transfer medium transferring the ultrasonic waves.

Ultrasonic wave amplifying unit and non-contact ultrasonic wave transducer using same

The present invention relates to a human interferon-beta mutein. In particular, the present invention relates to the human interferon-beta mutein having one or two additional sugar chains compared to natural human interferon-beta.

Human interferon-beta mutein

A reversible vein resin needle set for one time use designed not only to make the injection faster and convenient when injecting blood or injectant, but also to protect physicians and nurses from infection of AIDS, etc. caused by the metal needle stained by patient's blood. The device prevents the patient from infection of viruses through the metal needle by protecting the metal needle either in the cylinder of the resin needle set or in the connector, when injecting blood or injectant into the vein of a patient, by connecting the injectant container and one side of the resin needle set by the injectant line linked to the injectant regulator, and by keeping the metal needle in the cylindrical film shield or in the protective cylinder to shut off the outside. The device also protects the metal needle handling personnel from infection of AIDS and other diseases by holding the needle tip either in the cylinder or in the elastic body and in the rubber cap after the use of the metal needle.

Reversible vein resin needle set for one time use

Growing community of inventors

Daejeon, South Korea

Kyung Jun Song