Samsung Electronics Co., Ltd.

Seoul National University

Tsinghua University

Yonsei University

Hanwha Techwin Co., Ltd.

Korea University Industrial Academic Collaboration Foundation

Cheil Worldwide Inc.

Dong-jun Lee

Kyung-Hun Jang

Young-Soo Kim

Jong-Ae Park

Hyo-Sun Hwang

Kyoung-Moon Kang

Jung-Hoon Suh

Nam-Soo Kim

Jin-Bong Chang

Jae-Hyun So

Sung-Taek Moon

Bong-Su Ahn

Sunghyun Choi

Young-Sam Lim

Youngsoo Kim

Tae-Jin Lee

Jung-Ho Lee

Tae-Young Chung

Cheol-Ju Yun

Sung-hyun Choi

Young-Ho Kim

Kee-Bong Song

Sung-jin Park

Tae-Sung Kim

Keita Kato

Young-Gyoon Ryu

Seok-soo Lee

Byung-Jun Park

Myung-jin Lee

Youn-Joung Cho

Yool Kang

Min-Jung Kim

Kyoung-mi Kim

Jae-ho Kim

Atsushi Nakamura

Jun-Ho Kim

Jung-Sik Choi

Jung-sik Choi

Sang-Hyun Woo

Dae-Sik Hong

Jun-Hyun Cho

Boo-deuk Kim

Jong-ho Park

Heun-Chul Lee

Chang-Woo Seo

Jong-Ho Choi

Yong-Xing Zhou

Jong-han Kim

Zhigang Cao

Kyoo-Chul Cho

Jeong-ju Park

In-Kyu Lee

Mi-Ae Kim

Jin-Youn Cho

Hyung-rae Lee

Si-Young Lee

In-sun Jung

Dong-Ju Roh

Yeon Joo Lee

Yoong-Soo Kim

Ji-Hyung Kim

Gi-Sik Hong

Hyun-Ki Ahn

Sung-Tae Moon

Sung-Taok Moon

Sung-pil Choi

Sung-teak Moon

Jee-yun Lee

Jeong-Hyun Kim

Suk-Koo Hong

Gang-Youl Yu

Junfeng Jiang

Pingyi Fan

A smart toothbrush is provided. The smart toothbrush includes a toothbrush head configured to be provided with bristles, a toothbrush body configured to be connected to the toothbrush head and to be able to be held, a temperature sensor configured to measure a temperature within an oral cavity of a user while the user is brushing teeth using the smart toothbrush, and a processor configured to determine a tooth brushing section in which the user is brushing teeth within the oral cavity, based on a temperature value measured by the temperature sensor.

Method for determining tooth brushing section, and smart toothbrush and electronic device therefor

An organic electrolyte for magnesium batteries including an ether solvent; a magnesium compound represented by Formula 1 dissolved in the ether solvent; and a Lewis acid: 

Organic electrolyte for magnesium batteries and magnesium battery using the organic electrolyte

A communication system and a method of transmitting and/or receiving data in the communication system are provided. A method of transmitting media data of a camera to a user terminal in a communication environment in which the camera connected to a first network and the user terminal connected to a third network are connected to a second network includes: obtaining second address information of the second network that corresponds to first address information of the first network, from an address conversion apparatus; obtaining third address information of the second network from an address providing apparatus connected to the second network; transmitting the first through third address information to the user terminal through a session control server connected to the second network; and transmitting the media data to the user terminal based on at least one of the first through third address information.

Communication system and method of transmitting and receiving data in communication system

In the data transmission method, a MAC layer receives data from an upper layer, classifies the data according to destination addresses and traffic identifiers, aggregates the data by destination address and traffic identifier as a first transmission unit, aggregates the first transmission units having the identical destination address as a second transmission unit, and transmits the second transmission units having different destination addresses in a single frame. The data transmission method allows packets transferred from the upper layer to be hierarchically aggregated by DAs and TIDs and then packaged into a data unit for each destination such that it is possible to transmit the data at an optimal data rate for each destination terminal.

Data transmission method using packet aggregation

A method of fabricating a semiconductor device is disclosed comprising the steps of: providing a substrate having a first region, a second region and a plurality of gate electrodes which are formed on the first and second regions of the substrate; forming a mask film to expose the first region of the substrate while covering the second region of the substrate, such that the mask film has a negative lateral profile at a boundary between the first and second regions of the substrate; forming sigma trenches in the first region of the substrate by etching the first region of the substrate using the mask film and the gate electrodes as a mask; and forming an epitaxial layer in each of the sigma trenches.

Method of fabricating semiconductor device

A method of forming patterns of a semiconductor device may include forming a photoresist layer that includes a photo acid generator (PAG) and a photo base generator (PBG), generating an acid from the PAG in a first exposed portion of the photoresist layer by first-exposing the photoresist layer, and generating a base from the PBG in a second exposed portion of the photoresist layer by second-exposing a part of the first exposed portion and neutralizing the acid. The method may also include baking the photoresist layer after the first and second-exposing and deblocking the photoresist layer of the first exposed portion in which the acid is generated to form a deblocked photoresist layer, and forming a photoresist pattern by removing the deblocked photoresist layer by using a developer.

Method of forming patterns of semiconductor device

Disclosed is a method for detecting a hidden station in a specific station constituting a wireless communication network that includes receiving a frame after a lapse of an idle state interval longer than a predetermined waiting time; determining that there is a hidden station, if a size of the received frame is equal to a size of an Acknowledge (ACK) frame; and determining that there is no hidden station, if the size of the received frame is not equal to the size of the ACK frame.

Method for detecting hidden station in a wireless communication network and system therefor

A wireless communication system including transmitters for determining a transmission rate for an associated receiver according to channel state information fed back from associated receivers, and transmitting packets at the determined transmission rate. In a communication method, a transmitter groups packets to be transmitted to the receivers according to transmission rates, and generates frames configured by packets with an identical transmission rate. The transmitter aggregates frames with different transmission rates into one transmission burst, and sends the transmission burst. The data communication method based on packet aggregation can efficiently manage resources by determining transmission rates for reception stations (STAs) on the basis of feedback channel state information in a transmission STA, aggregating packets to be transmitted to the reception STAs to form a packet group, and transmitting packet groups with different transmission rates using one multi-rate aggregation (MRA) burst.

Data communication method based on multi-receiver aggregation

Disclosed is a receiver for configuring a Block Acknowledgement (BA) frame in a wireless communication system for acknowledgement of a data transmission from a transmitter. The receiver receives a Block Acknowledgement Request (BAR) frame in the data transmission from the transmitter and determines an overall size of a bitmap for the BA frame from the BAR frame to acknowledge the data transmission. The receiver configures the BA frame of the response to include the bitmap having the determined overall size, and transmits the configured BA frame to the transmitter. The bitmap of the BA frame includes bits representing reception results of packets of the data transmission received from the transmitter.

Apparatus for reporting reception result of packets in mobile communication system

In a slurry composition and a method of polishing a layer using the slurry composition, the slurry composition includes from about 3 to 20 percent by weight of an abrasive, from about 0.1 to 3 percent by weight of an ionic surfactant, from about 0.01 to 0.1 percent by weight of a nonionic surfactant, from about 0.01 to 1 percent by weight of a polish accelerating agent including an amino acid compound, and a remainder of an aqueous solution including a basic pH-controlling agent and water. The slurry composition including the nonionic surfactant and the polish accelerating agent may be used for speedily polishing a stepped upper portion of a silicon oxide layer, and may also enable a lower portion of the silicon oxide layer to function as a polish stop layer.

Slurry compositions and methods of polishing a layer using the slurry compositions

Disclosed is a method for configuring a bitmap in a mobile communication system employing a block ACK scheme, which faithfully performs its intrinsic function of acknowledging a reception result, and yet can reduce transmission delay and the overall system load due to retransmission in the case where packet loss is relatively less important than transmission delay time, such as in the case of voice communication. To this end, a recipient compares a PER of a received packet signal with a threshold value. If the PER is higher than the threshold value, the recipient operates in the block ACK scheme, and if the PER is lower than the threshold value, the recipient determines a bitmap configuration scheme on the assumption that an erroneous frame has been successfully received. Also, using the determined bitmap configuration scheme, the recipient transmits a reception result for each received packet.

Method for reporting reception result of packets in mobile communication system

A method for selecting an antenna in an orthogonalized spatial multiplexing system. Upon receipt of at least one symbol from a transmitter via multiple receive antennas, a receiver decodes each of the received symbols; determines a rotation angle between the received symbols, and selects an optimal subset of transmit antennas using a distance between vectors of the decoded symbols; generates feedback information including the determined rotation angle and the selected optimal subset, and transmits the generated feedback information to the transmitter. Upon receipt of the feedback information, the transmitter beam-forms an antenna corresponding to the optimal subset depending on the received feedback information, and transmits a data symbol to the receiver. The receiver detects each of data symbols received from the transmitter.

Apparatus and method for selecting antenna in an orthogonalized spatial multiplexing system

A method is provided for efficiently allocating a transmission period in a wireless network system. An access point (AP) transmits a PSMP frame indicating a downlink period provided to each station (STA) and a minimum amount of an uplink period allocated to each STA, and at least one sub PSMP frame indicating an uplink period additionally provided for an STA that transmitted a resource request message for remaining queued data in the uplink period indicated by the PSMP frame. If the uplink period indicated by the PSMP frame is insufficient to transmit the queued data, the STA transmits a data unit including a part of the queued data and a resource request message for the remaining queued data in the uplink period. After transmitting the resource request message, the STA receives the sub PSMP frame after the full period indicated by the sub PSMP frame, and transmits the remaining queued data to the AP in the uplink period indicted by the sub PSMP frame.

Method for allocating transmission period in a wireless communication system

A slurry composition includes an acidic aqueous solution and one or both of, an amphoteric surfactant and a glycol compound. Examples of the amphoteric surfactant include a betaine compound and an amino acid compound, and examples of the amino acid compound include lysine, proline and arginine. Examples of the glycol compound include diethylene glycol, ethylene glycol and polyethylene glycol.

Slurry compositions, methods of preparing slurry compositions, and methods of polishing an object using slurry compositions

Growing community of inventors

Seoul, South Korea

Dong-jun Lee