Electronics and Telecommunications Research Institute

Lg Chem, Ltd

Hoon Jeong

Je Young Kim

Ki Hwan Kim

Yong Ju Lee

Jong-Suk Chae

Su Jin Kim

Ki-Hwan Kim

Yoon Ah Kang

Jin Hyong Lim

Cheol-Sig Pyo

Jong Suk Chae

Ho-Jin Lee

Ki Tae Kim

Jeong Ho Park

Sun-Joong Kim

Tae Su Kim

Bong Soo Kim

Seong-Soon Joo

Seong Soon Joo

Eun Jeong Lee

Byeong-Cheol Choi

Jong Jun Park

So Young Hwang

Joon-Gyu Ryu

Hyo-Chan Bang

Jong-Oh Lee

Jae-Hong Ruy

Jong-jun Park

Jong-suk Chae

Jong-Young Lee

Minsu Shin

Provided is a negative electrode active material comprising (a) a core including one or more non-carbon-based materials selected from the group consisting of silicon, nickel, germanium, and titanium, and (b) an organic polymer coating layer formed of a polymer compound having a content of a fluorine component of 50 wt % or more on a surface of the core.

Negative electrode active material for lithium secondary battery and lithium secondary battery comprising the same

Disclosed herein are a telephone, a switchboard, and a method for sending a message between the telephone and the switchboard using a Dual Tone Multiple Frequency (DTMF) signal. The telephone includes a sensor interface unit for collecting sensing signals by being connected to sensors, a transmission unit for generating a message using the sensing signals, converting the message into a DTMF signal, and transmitting the DTMF signal and a telephone signal, and a power distribution unit for being supplied with power from the switchboard and distributing the power to operation units.

Message sending device and method thereof

Provided is a negative electrode active material comprising (a) a core including a carbon-based material, and (b) an organic polymer coating layer formed of a polymer compound having a content of a fluorine component of 50 wt % or more on a surface of the core.

There is provided a mesh routing method in beacon-enabled wireless AD-HOC networks that includes: broadcasting, by nodes constituting a wireless AD-HOC network, a beacon message loading neighbor node information on a beacon payload; managing, by a node receiving the broadcasted beacon message, its own neighbor node table by extracting the neighbor node information loaded on the beacon payload; and performing, by a source node attempting to transmit data or commands, mesh routing on the basis of its own neighbor node table.

Mesh routing method and mesh routing apparatus in beacon enabled wireless AD-HOC networks

Disclosed are a sensor node having a self localization function and a self localization method of the sensor node. The sensor node calculates a location thereof by receiving location information measured at each of two mobile nodes at different times and using four location information of the received location information. Additional cost and power consumption required for installing additional equipment such as an anchor node, a ultrasonic transceiver and a signal amplifier are reduced.

Sensor node having self localization function and self localization method thereof

Provided is a method for determining superframe to efficiently perform beacon scheduling by allocating superframe lengths which are different according to a routing depth of sensor nodes in a ZigBee based wireless sensor network. The method for determining a superframe for beacon scheduling, includes the steps of: receiving a beacon from a neighboring node and grasping information on a superframe used by the neighboring nodes; and determining a transmission time and a length of own superframe based on superframe information of the grasped neighboring node.

Method for determining superframe for beacon scheduling

Provided are a forward link rain attenuation compensating apparatus using an adaptive transmission scheme in an interactive satellite communication system and a method thereof. The apparatus separates the mobile stations into clear-sky mobile stations and mobile stations in the state of rain attenuation and makes the clear-sky mobile stations receive data having a high data transmission efficiency at a high-speed while making the rain attenuation mobile stations receive the data continuously although the data transmit rate is low by making each of the two kinds of mobile stations receive data frames of a different transmission method, and provides a method therefor. The apparatus includes: a resource manager, a transmitting data format converter, a forward modulator, a backward demodulator, a receiving data format converter.

Apparatus and method for compensating forward link rain attenuation based on adaptive transmission scheme for interactive satellite transmission system

Growing community of inventors

Daejeon, South Korea

Hoon Jeong