Yonsei University

Sk Telecom Company, Ltd.

Korea Institute of Science and Technology

Cheil Synthetics Inc.

Kyung Sik Min

Sung Ho Moon

Min Soo Na

Tak Ki Yu

Tae Hyung Kim

Young Lak Kim

Soo Yong Choi

Tae Guen Kim

Hee-Woo Rhee

Chung Y Kim

Han Ho Wang

Ok K Cho

Geon Y Kim

The present invention suggests a cell management apparatus and a method for operating a cell management apparatus, capable of harmoniously satisfying effects of improving intercell interference and enhancing operation efficiency of radio resources in managing virtual cells, particularly in managing virtual cells in a heterogeneous network environment in which cells having different sizes coexist.

Cell management apparatus and method for operating cell management apparatus

The present disclosure relates a terminal device capable of enhancing cell throughput in consideration of an interference environment created in a heterogeneous network environment where cells of different sizes which use different frequency bands coexist, and a method of operating the same.

Terminal device and operating method of terminal device

The present invention discloses a base station control device which controls the base station management and the carrier aggregation (CA) function according to a heterogeneous network environment, such that an optimum system throughput can be obtained in the heterogeneous network environment through the CA function, and an operating method of the base station control device.

Base station control device and method for operating same

An organic-optic recording tape of higher capacity and higher packing density of data. This tape comprises a backcoating layer, a base film coated on the backcoating layer, and a complex functional layer for writing, reading and erasing data. The complex functional layer is coated on the base film and selectively focused by laser beams of different powers outputted from a laser diode in order to write, read or erase data. This complex functional layer is made of a block polymer prepared by blending a thermoplastic elastomer and a viscoelastic transparent thermoplastic high-molecular resin or polymerizing them. Near infrared absorbing organic colorants are dispersed in the complex functional layer. The transparent thermoplastic resin has a glass transition temperature higher than that of the elastomer. The recording is effected by employing a laser beam of lower power capable of inducing thermal expansion of the elastomer and formation of a bump. The erasing is effected by employing a laser beam of higher power capable of inducing viscousness of the resin. The reading is effected by employing a laser beam of very lower power capable of causing reflectivity difference between the bump and the normal part of the complex function layer.

Organic-optic recording tapes

There is provided a process for preparing five-membered heterocyclic polymers represented by a formula (II) which comprises electrochemically polymerizing five-membered heterocyclic monomers of formula (I) in the presence of tetrabutylammonium alkylsulfate as an electrolyte and an organic solvent, wherein formulas (I) and (II) are represented by the formulas ##STR1## and wherein, M represents nitrogen or sulfur, provided that hydrogen is deleted when M is sulfur;

Electrochemical polymerization of five-membered heterocyclic monomers

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Seoul, South Korea

Kyung Sik Min