Samsung Electronics Co., Ltd.

Lg Electronics Inc.

Sunkwang Lightning Protection Technical Institute Inc.

Korea Institute of Science and Technology

Seagate Technology International

Institute for Information Technology Advancement

Yong-Su Kim

Chee-kheng Lim

Hoo-san Lee

Young-hun Im

Dong-Hoon Lee

Kyung-Han Jeong

Kwang-Ha Suh

Eun-sik Kim

Dong-Jin Kim

Kook-hyun Sunwoo

Sang Wook Han

Kyoung-won Na

Byung-kyu Lee

Hoon-sang Oh

Sung Wook Moon

No-yeol Park

Seong-Jae Kim

Nam-Gi Lee

Dong-Min Kim

Byeong-U Kim

Jong-Yeon Kim

Wan-Seong Kwon

Yoon-Dong Park

Dong-hyun Kim

Sung-chul Lee

Sang-min Shin

Cheol-soon Kim

Gye-Young Song

Kyeong-Bae Park

Chul-Min Choi

Kyung-jin Lee

Hyeong-Kook Lee

Jae-chul Shim

Yun-Woo Nam

Je-Nam Kang

Il Young Kim

Sang-Won Seo

Jae-Hyo Park

Kyung-Hoon Jang

Byungkwon Park

Tae-hyo Lee

Kwang-Yeop Jang

Yujun Choi

Young-Hun Im

Young-hoon Im

Jin-Yeong Lee

Hee-Soo Park

Won-Sung Kwon

Hoo-San Lee

An apparatus for estimating the lifetime of a surge protective device (SPD) using the discharge characteristics of a metal oxide varistor (MOV) includes an MOV having an input terminal and an output terminal; an impulse voltage application unit applying an impulse voltage for MOV test to the input terminal of the MOV; a discharge current measurement unit; a first switching unit connecting a power line to the input terminal of the MOV; a second switching unit connecting a ground line to the output terminal of the MOV in the normal mode and selectively connecting the discharge current measurement unit in the MOV test mode; an MOV test management unit providing information; a discharge current check unit generating an MOV abnormal signal; and an MOV state display unit displaying an MOV abnormal signal.

Apparatus for estimating lifetime of the SPD using discharge characteristics of the MOV

A ground electrode () positioned in the earth and a monitoring device () configured to measure a current and resistance of a ground line, where the monitoring device () includes a ground current sensing unit () configured to measure the current of the ground line, a resistance sensing unit () configured to measure ground resistance of the earth and an earth resistance rate, a voltage sensing unit () configured to check a voltage value of commercial power, a temperature and humidity sensing unit () configured to check a surrounding temperature and humidity of the monitoring device (), and a monitoring unit () configured to confirm whether the ground current, ground resistance and earth resistance measured are abnormal values by compared with reference values classified based on the temperature and humidity measured.

System for monitoring resistance and current in ground line

Disclosed is a method for stabilizing a quantum cryptography system, which includes: determining whether the quantum cryptography system operates in a stabilized state, on the basis of a bit error rate or a key rate of the quantum cryptography system; and readjusting an arrival time of a gate pulse or a laser operation time so that an arrival time of a single photon for a photon detector is aligned with the arrival time of the gate pulse, when the quantum cryptography system does not operate in a stabilized state. Here, the quantum cryptography system may be a two-way quantum cryptography system.

Apparatus and method for stablizing quantum cryptography system

An apparatus for quantum cryptographic communication includes a light source configured to generate an optical pulse which is transmitted to a plurality of quantum code sending devices, and a quantum entanglement measuring unit configured to receive the optical signal generated from each of the plurality of quantum code sending devices and measure a relation among quantum states of the optical signals received from the plurality of quantum code sending devices; the optical signal being generated by encoding a key to a quantum state of the optical pulse. The apparatus for quantum cryptographic communication may further include a signal direction determining unit, a reflector for reflecting the optical pulse or the optical signal, an arbitrary phase shifter, or a modulator for encoding a digital signal corresponding to the key to the optical pulse.

Method and apparatus for quantum cryptographic communication

An apparatus for checking damage to a surge protector and automatically changing a surge protector includes a casing, a current inflow unit supplied with an external current, a current discharge unit configured to supply an inflow current to an external electronic device, surge protectors placed between the current inflow unit and the current discharge unit in parallel, selectively connected to the current inflow unit, and supplied with an electric current, a relay placed between the current inflow unit and the surge protectors and configured to selectively connect the surge protectors to the current inflow unit, and a surge protector damage check unit configured to check whether a surge protector connected to the current inflow unit has been damaged by applying a voltage between the current inflow unit and the current discharge unit.

Apparatus for checking damage to surge protector and automatically changing surge protector

An ice detecting apparatus for an ice maker provided in a refrigerator includes an ice maker, and an ice detecting sensor attached to the ice maker and detecting an amount of ice collected in an ice container. The ice detecting sensor includes at least one optical transmitter or emitter provided on one side of the ice maker and at least one receiver at another side of the ice maker. The optical transmitter and receiver are separated by a prescribed distance and, at least one heater is provided to generate heat to be transferred to at least one of the optical transmitter or receiver.

Refrigerator and ice maker with optical sensor to detect ice level

An ice detecting apparatus for a refrigerator the apparatus includes an ice maker, an ice container to collect ice made by the ice maker, and an ice detecting sensor to detect an amount of ice stored in the ice container. The ice detecting sensor has a transmitter module provided on one side of the ice maker and a receiver module provided on another side of the ice maker. The transmitter module is separated by a prescribed distance from the receiver module. At least one of the transmitter module or receiver module includes at least one optical element and at least one heater, and the heater is made of an electroconductive heating material.

An ice detecting apparatus for a refrigerator having an ice maker includes an ice detecting sensor which determines whether or not an ice storage container which receives and stores ice made by the ice maker is full or nearly full of ice based on pulses transmitted from and received by transmitting and receiving units. The ice detecting sensor includes a transmitting unit to transmit one or more pulses and a receiving unit to detect the pulses transmitted from the transmitting unit. A controller is operably coupled to the transmitting and receiving units to determine whether the storage container is full or nearly full based on pulses detected by the receiving unit among one or more pulses transmitted by the transmitting unit. The controller also determines whether or not external light has been introduced into the ice maker based on the pulses detected by the receiving unit.

Ice detecting apparatus of ice maker for refrigerator and ice detecting method thereof

A method of determining a amount of ice collected in a storage container of a refrigerator, the ice being discharged into the storage container by an ice maker having an ice detecting sensor with a heater, the method comprises determining whether or not the ice storage container is full or nearly full of ice by turning on the detecting sensor for a prescribed period of time. In one embodiment, the heater is turned on while the determining step is preformed. In an alternative embodiment, the heater is continuously maintained in an 'ON' state.

Ice detecting method and apparatus for a refrigerator

An apparatus for moving a magnetic domain wall and a memory device using a magnetic field application unit are provided. The apparatus for moving a magnetic domain wall includes a magnetic layer having a plurality of magnetic domains; current supply units that are disposed on both sides of the magnetic layer and supply current to the magnetic layer; and a magnetic field application unit that is disposed on at least one surface of the magnetic layer and applies a magnetic field to the magnetic layer.

Apparatus for moving magnetic domain wall and memory device including magnetic field application unit

Disclosed is the auger in an ice bin mounted in a refrigerator, and the like. The auger in the ice bin is configured to rotate a plurality of augers having spiral-shaped transfer blades and to dispose ice in each space between the transfer blades of the auger for transfer. Accordingly, a certain amount of ice can always be discharged without simultaneously discharging a great amount of ice, and a user may select the number of ice, thus to diversity functions of an ice dispenser. In addition, since the auger is made of a flexible material, the ice can be prevented from being crushed during transfer, thereby enhancing the reliability of the ice dispenser.

Auger in ice bin and refrigerating machine having the same

A method of detecting an amount of ice stored in a storage bin made by an ice maker of a refrigerator, the method comprises applying heat to the ice detecting sensor of the ice maker, detecting an amount stored in the storage bin, and controlling heat application according to the detected amount. The ice maker has an ice detecting sensor attached thereto. A sensor heater provides the heat.

Ice amount detecting method of ice detecting apparatus of ice maker for refrigerator

A magnetic write head includes a main pole, a return yoke forming a magnetic path with the main pole, a side shield formed at both sides of the main pole, and a shield gap layer formed between the side shield and the return yoke. The side shield and the return yoke have portions connected to each, and are separated from each other by the shield gap layer in an area except for the portions which contact. A first gap layer formed of a nonmagnetic insulation material is formed between both sides of the main pole and the side shield. A gap is formed between an end portion of the main pole and an end portion of the return yoke and a second gap layer is formed in the gap with a nonmagnetic insulation material.

Magnetic write head with side shield and gap layer

A perpendicular magnetic recording head and a method of manufacturing said perpendicular magnetic recording head are provided. The perpendicular magnetic recording head has a main pole, a coil, which applies a magnetic field to the main pole, and a return pole constituting a magnetic circuit together with the main pole. The main pole has a back pole around which the coil is wound and a front pole contacting the back pole. The back pole and the front pole are formed on the same plane.

Perpendicular magnetic recording head having front and back poles of different specific resistances

A perpendicular magnetic recording head including: a data recording module comprising a main pole, a return pole, and a coil wrapped around the main pole; and a data reproduction module including magnetic shield layers and a reading device located between the magnetic shield layers, wherein the width of a lower end of the main pole is gradually reduced in a downward direction thereof, and the lower end of the main pole comprises a first part and a second part extending from the first part, the first part having a curved surface of a first curvature and the second part having a curved surface of a second curvature. The first curvature can be equal to or different from the second curvature, and magnetic shield devices can be further disposed on both sides of the lower end of the main pole.

Perpendicular magnetic recording head having a tapered main pole

Growing community of inventors

Seoul, South Korea

Yong-Su Kim