Electronics and Telecommunications Research Institute

Korea Atomic Energy Research Institute

Other

Chang-Kyu Kim

Ki-Hwan Kim

Se-Jung Jang

Chi Hoon Jun

Youn Tae Kim

Chang Auck Choi

Myung Lae Lee

Sung-Weon Kang

Gunn Hwang

Sung-Eun Kim

Chang-Hee Hyoung

Ho Jin Ryu

Jin-Kyung Kim

Duck-Gun Park

Jin-Bong Sung

Seok-Jin Oh

Chang-Auck Choi

Seong-Won Park

Myung-Lae Lee

Young-Joon Shin

Yoon-Sang Lee

Sun-Ju Choi

Chang-Han Je

Sung-Hae Jung

Jong-Man Park

Il-Hyun Kuk

Eung-Soo Kim

Dong-Seong Sohn

Eng-Soo Kim

Se Jung Jang

The present invention relates to a sound transmission system using a human body as a propagation medium. The transmission system includes a first signal transmitter and a second signal transmitter respectively generating signals having frequencies corresponding to each other, the first and second signal transmitters being coupled to the human body, wherein the first and second signal transmitters respectively generate high frequency signals having an opposite phase to each other, and the respective signal transmitters combine the audio signals and the high frequency signals to transmit the combined signals to the human body. The respective signal transmitters combine the generated audio signals and high frequency signals, adjust an output phase of the combined signals, and transmit the combined signals through the human body.

Sound transmission system

Provided are a Micro Electro-Mechanical System (MEMS) package and a method of packaging the MEMS package. The MEMS package includes: a MEMS device including MEMS structures formed on a substrate, first pad electrodes driving the MEMS structures, first sealing parts formed at an edge of the substrate, and connectors formed on the first pad electrodes and the first sealing parts; and a MEMS driving electronic device including second pad electrodes and second sealing parts respectively corresponding to the first pad electrodes and the first sealing parts to be sealed with and bonded to the MEMS device through the connectors to form an air gap having a predetermined width.

MEMS package and packaging method thereof

A variable optical attenuator with tunable wavelength selectivity includes at least two reflectors disposed parallel to each other at a predetermined angle from an optic axis and driving units connected to said at least two reflectors for allowing the reflectors to move back and forth in a direction perpendicular or parallel to the optic axis or to revolve centering on an axis perpendicular or parallel to the optic axis. Since the variable optical attenuator of the present invention serves as a variable optical attenuator and, at the same time, as a tunable wavelength filter, problems of insertion loss and optical alignment that might be caused by separately installing a variable optical attenuator and a wavelength filter can be effectively prevented. Moreover, by implementing the variable optical attenuator and the tunable wavelength filter by using a single device, the size of a system using the optical attenuator can be reduced.

Variable optical attenuator with tunable wavelength selectivity

Disclosed are a method and an apparatus for producing a uranium foil with fine crystalline granules by forming the foil by the gravitational dropping of molten uranium or uranium alloy and rapidly cooling the foil by the contact with cooling rolls, and a foil produced thereby. In accordance with the present invention, a high-purity and high-quality uranium foil with an isotropic structure and fine crystalline granules is easily produced via a simple process without requiring hot rolling and heat treatment processes. The surface of the foil is prevented from oxidizing and residual stress is not imparted to the foil. The productivity and the economic efficiency of the foil are improved.

Method and apparatus for producing uranium foil and uranium foil produced thereby

Disclosed are a method and an apparatus for continuously casting a uranium rod so that impurities generated in melting the metallic substance reduced from nuclear spent fuel are easily removed, the molten metal is easily degassed, the oxidation of uranium is prevented, and the molten metal does not remain in a crucible, thereby completely removing the noxious gas, improving the safety of work, allowing the workers to be close to the apparatus, reducing the consumption rate of the inert gas, completely preventing the oxidation of uranium, and being remotely controlled.

Method and apparatus for continuously casting uranium rod

The invention is directed to a high-density dispersion nuclear fuel having spherical particles of an uranium alloy dispersed in a nonfissionable matrix. The alloy includes uranium and 4-9 wt % Q, wherein Q is selected from the group consisting of Mo, Nb, and Zr. A process of manufacturing the spherical particles is also disclosed.

Dispersion fuel with spherical uranium alloy, and the fuel fabrication

Growing community of inventors

Daejeon, South Korea

Chang-Kyu Kim