Samsung Electronics Co., Ltd.

Pusan National University

Postech Academy-industry Foundation

Postech Foundation

Samsung Sdi Co., Inc.

Korea Advanced Institute of Science and Technology

Korea Ocean Research and Development Institute

Dong-Geun Lee

Seung-chan Park

Ho-jin Jang

Yong-il Moon

Sang-hoon Lee

Ji-Won Moon

Dong-Cheol Ahn

Yong-Kwan Cho

Hyun-Su Yoon

Bum-Man Kim

Ji-won Moon

Kwang-Seung Lee

Jeong-Hyeon Cha

Sung-Jin Kim

Young-Min Kim

Jung-Hyun Lee

Jong-Hyun Lee

Han-Seok Kim

Yong-hoon Kim

Sang-Kyun Kim

Tae-ho Kim

Hyun-Ji Song

Mi-Hyun Son

Bumman Kim

Yoo-Jeong Choi

Hyo-Young Kwon

Byung-Tae Yoon

Song-cheol Hong

Kyoung-Tae Kim

Youn-Hee Nam

Jae-Hun Lee

Sang-Jin Kim

Young-Yoon Woo

Byeong-no Jeong

Yu-Shin Park

Seulgi Jeong

Jung-Hwan Moon

Sun-Hae Kang

Byeri Yoon

Il-Du Kim

Jong-Wook Zeong

Jung-Hwan Son

Hyung-seok Chang

Nam-Young Kim

Sang-Hyeon Lee

Seong-Woo Cho

Min-Kyung Jang

Jeong-Ho Jeon

Sung-Soo Park

Jung-Gu Korea Atomic Energy Research Ins Lee

Han-Sang Lee

Chang-Kyu Kim

Nack-Joon Kim

Young-Soo Park

A polymer includes a structural unit represented by Chemical Formula 1 and an organic layer composition including the same. wherein in Chemical Formula 1, A is a carbon cyclic group including at least one hetero atom, B is one of groups in Group 1, where Arto Ar, Rto R, L and m are as defined in the specification and * is a linking point. When the carbon cyclic group includes at least two hetero atoms when the carbon cyclic group includes a pentagon cyclic moiety and the pentagon cyclic moiety includes a nitrogen atom (N) as a hetero atom, and the at least two hetero atoms are the same or different: 

Polymer, organic layer composition, organic layer, and method of forming patterns

A toner cartridge and an electrophotographic image forming apparatus are provided. The toner cartridge attachable to, or detachable from a main body of an image forming apparatus includes a toner containing unit, a waste toner containing unit that is disposed below the toner containing unit in a gravitational direction and comprises a waste toner inlet through which waste toner flows, a first waste toner transporting member that transports the waste toner from the waste toner inlet in a length direction of the waste toner containing unit, and a second waste toner transporting member that transports the waste toner that is transported in the length direction of the waste toner containing unit in a width direction of the waste toner containing unit to disperse the waste toner in an inner portion of the waste toner containing unit, wherein a rotational center of the second waste toner transporting member is lower than a rotational center of the first waste toner transporting member.

Toner cartridge and electrophotographic image forming apparatus using the same

Printer developer

An apparatus of a power amplifier is provided. The apparatus includes an input boosting circuit configured to match a second harmonic input signal using a harmonic control circuit of an input stage to maximize an efficiency and an output power, a die cell configured to receive and amplify an output signal of the input boosting circuit, and an output boosting circuit configured to receive an output signal of the die cell and to match a second harmonic output signal of the output signal of the die cell using a harmonic control circuit of an output stage to maximize the efficiency and the output power.

Apparatus and method for matching harmonics

Toner cartridge

Provided is a method in which a Digital Pre-Distorter (DPD) performs digital pre-distortion on a received In-phase (I) signal, a received Quadrature-phase (Q) signal, a feedback I signal, and a feedback Q signal; a mixer mixes a signal output from the DPD with a frequency signal output from an oscillator; each of n phase shifters phase-shifts a signal output from the mixer according to a preset beamforming pattern; each of n Power Amplifiers (PAs) amplifies a signal output from an associated phase shifter according to a gain, the PAs connected to the associated phase shifter on a one-to-one basis; each of n envelope detectors detects an envelope signal from a signal output from an associated PA, the envelope detector connected to the associated PA on a one-to-one basis; and a control unit determines whether the n PAs operate normally, using the envelope signals output from the n envelope detectors.

Apparatus for compensating for distortion of transmitter array in radio communication system and method for controlling the same

An electrophotographic image forming apparatus and development cartridge are provided. The apparatus including a separating member mounted in a development cartridge. The separating member includes a development nip separating portion and a charging nip separating portion respectively separating a development nip and a charging nip when the development cartridge is mounted in a mounting portion of a photoreceptor cartridge mounted in a body.

Electrophotographic image forming apparatus and development cartridge

A method and apparatus improve the performance of a carrier amplifier in a Doherty amplifier. The Doherty amplifier includes a power divider, a carrier amplifier, at least one peaking amplifier, offset lines, and a Doherty circuit. The power divider provides a power signal to each of the carrier amplifier and the at least one peaking amplifier. The carrier amplifier amplifies power of a signal inputted from the power divider. The at least one peaking amplifier amplifies power of a signal inputted from the power divider. The offset lines control a load impedance when the at least one peaking amplifier does not operate. When the at least one peaking amplifier does not operate, the Doherty circuit generates the load impedance of the carrier amplifier that is larger than twice a load impedance at the maximum output power of the carrier amplifier.

Apparatus for improving performance at low power region in a Doherty amplifier

An aerodynamic lens includes a cylindrical hollow body having an inlet and an outlet, and first and second focusing parts formed in the body. The first focusing part includes a plurality of orifice lenses of which inner diameters (df) are gradually decreased in an advancing direction of particle. The second focusing part includes a plurality of orifice lenses of which inner diameters (df) are gradually increased in the advancing direction of particle.

Aerodynamic lens capable of focusing nanoparticles in a wide range

An apparatus and method for controlling a high power amplifier in a communication system are provided. The apparatus includes a Radio Frequency (RF) power detection unit for detecting an intensity of an RF input signal, a high power amplifier controller for determining a control signal, which indicates a voltage value of a drain bias to be provided to at least one drain node from among drain nodes of a drive amplifier and a main amplifier included in the high power amplifier, according to the detected intensity, a Direct Current (DC) voltage supplying unit for generating a DC voltage corresponding to the determined control signal, a drain bias connection unit for providing the generated DC voltage to said at least one drain node from among the drain nodes of the drive amplifier and the main amplifier, and the drive amplifier and the main amplifier for amplifying the RF input signal according to the provided DC voltage.

Method and apparatus for controlling high power amplifier in communication system

The present invention relates to a novel protease, a polynucleotide encoding the protease, and a fibrinolytic agent comprising the same. The protease is obtained from a new gene source by using metagenomic library technology, and can replace the conventional fibrinolytic agent.

Fibrinolytic metalloprotease and composition comprising the same

An aerodynamic lens, comprises a cylindrical body having an inlet and an outlet; and a convergence-divergence lens portion inside the cylindrical body, having a lens hole formed at the center of the convergence-divergence lens portion, through which a carrier gas and particles pass, a convergence slant surface at a convergence angle (&#x3b1;) with a central axis of the aerodynamic lens at the front of the lens hole, and a divergence slant surface at a divergence angle (&#x3b2;) with the central axis of the aerodynamic lens at the rear of the lens hole.

Aerodynamic lens

Growing community of inventors

Hwaseong-si, South Korea

Dong-Geun Lee