Electronics and Telecommunications Research Institute

Korea Railroad Research Institute

Krri

Jung Youl Lim

Jin Ho Lee

Jeong Min Jo

Kwan Sup Lee

Min Hwan Ok

Chang Young Lee

Su Yong Choi

Jae Heon Choe

Jae Hoon Kim

Jin Sung Choi

Kwang Ho Yang

Kwang Hyun Shim

Hun Joo Lee

Hyun Bin Kim

Yong Woo Jung

Bum Hyun Lim

Yong Jun Jang

Lee Hyeon Kim

Young Jun Jang

Provided is a hypertube transport system. Specifically, provided are a magnetically-levitated train and an infrastructure-system in which same travels, comprising: refrigerant for cooling compressed air of a hypertube train, and a compressed air cooling system utilizing the refrigerant; an apparatus and method for controlling trains operating in a vacuum tube; superconducting switches for superconducting magnets for magnetic levitation; a driving stability apparatus for the hypertube transport system; a control apparatus for trains of the hypertube transport system; and an energy harvester.

Hypertube transport system

A tube infrastructure includes a first tube; a second tube that is coupled to the first tube; and a fluid tank that is disposed to surround a coupling region of the first tube and the second tube and is filled with a fluid to seal the coupling region, wherein the fluid tank allows negative pressure to be maintained inside the first tube and the second tube.

Tube infrastructure with vacuum pressure

A database query system is provided. The database cache system includes: a network library which processes an access request issued by the online game server by using an input output completion port (IOCP); at least one database connection module which provides a connector for reading data from the database or recording data to the database; a database cache which stores data read from the database by the database connection module; and at least one cache buffer which is allotted to an IOCP worker thread corresponding to a database query request issued by the online game server and stores data read from the database, which is to be transmitted to the online game server.

Database cache system

Growing community of inventors

Seoul, South Korea

Jung Youl Lim