Korea Advanced Institute of Science and Technology

Korea Institute of Science and Technology

Tai Woo Park

In Seok Hwang

June Hwa Song

Young Ki Lee

Chan You Hwang

Hyuk Jae Jang

A Ram Choi

Myung C Shin

Young Hak Chung

Keun Yong Sohn

Young Y Lee

Provided is a system and method for perceiving an outcast in a group. The system may include: a plurality of member terminals held, respectively, by a plurality of members conducting an outdoor activity and configured to transmit waves with a radio frequency; and a leader terminal held by a leader of the outdoor activity and configured to receive the waves transmitted from the plurality of member terminals, to sense intensities of the waves, to obtain distances between the plurality of member terminals from the sensed intensities of the waves, to calculate a group distance based on the obtained distances between the member terminals, to sort the plurality of member terminals into at least one subgroup, and to determine an outcast member terminal excluded from the at least one subgroup.

System and method for perceiving outcast in group

Provided is a system and method for monitoring a student behavior in a field trip. The system may include: a plurality of member terminals held respectively by a plurality of members conducting a group activity and provided with a plurality of sensors, an imaging device, and a data storage device to collect and store behavior information of the members to match time information, the behavior information including location information, orientation information, view information, and motion information; at least one leader terminal held by a leader and configured to receive and store the behavior information of the members collected by the plurality of member terminals; and an analysis terminal configured to receive the behavior information from the at least one leader terminal and the plurality of member terminals.

System and method for monitoring behavior of students in field trips

A manufacturing method of aluminum-lithium alloy by atmospheric melting in which oxidation of lithium is minimized through improvement of degassing system under normal atmospheric melting method without using separate hermetically sealing device for isolating from atmosphere upon melting of alloy material. The method is carried out in that aluminum and other alloy elements except metal lithium are melted in atmosphere, and primary degassing process is executed in a state that surface of the molten metal is covered with a flux such as LiCl or LiF, and then metal lithium ingot covered with aluminum is added to molten metal and secondary degassing process is executed with bubbling inert gas and thereafter tertiary degassing process is executed by flowing inert gas such as argon through hermetically sealed pouring path of molten metal.

Manufacturing method of aluminum-lithium alloy by atmospheric melting

Growing community of inventors

Daejeon, South Korea

Tai Woo Park