baber/WOPTO huggingface dataset:
Patent KR-20010092159-A (KR)
Title: Rod type polymer preform having radially-varying properties, process for the preparation thereof and apparatus therefor
Inventor: KIM IN BAE
IPC: C08F2/00
Filed: 2000-03-21
Abstract: PURPOSE: A rod-shaped polymer preform whose physical properties changes along the radial direction, its preparation method and an apparatus used for its preparation are provided, wherein the polymer preform is applied to a polymer optical fiber and an optical lens. CONSTITUTION: The method comprises the steps of: inserting source materials into a pipe-shaped reactor; heating the reactor with rotating it to react the materials; and repeating the process two times or more, wherein the kind of source materials and the composition are changed at the each steps. The source materials are independent one another and are a monomer, a homopolymer, a copolymer or mixtures thereof. Preferably the physical properties is an optical properties, more preferably is a refractive index. The apparatus comprises a rod-shaped reactor; a sealing means(2) which is placed at both terminals of the cylindrical reactor(1); a source material-inserting entrance(4) which is placed in one or both sides of the sealing means; a rotation axis(3) which is connected with the reactor or the sealing means; a driving means which is connected with the rotation axis; and a heating means for heating the reactor. The horizontal cross-section of the reactor is round, elliptical, polygonal or geometrical.
Patent KR-20010092211-A (KR)
Inventor: HUH HYEON GU
IPC: H04B7/26
Filed: 2000-03-21
Abstract: PURPOSE: A correction and statistics method for DM(Diagnostic Monitor) logging data of a mobile terminal is provided to enhance the accuracy of analysis statistics by correcting a time and a slot number of each message to newly generate the DM logging data, analyzing the generated DM logging data, and calculating an accurate statistics when testing paging performance. CONSTITUTION: A time and a slot message of each message in logging data received from a mobile terminal to a DM are corrected for newly generating the DM logging data(S10). A statistics to the DM logging data is calculated through analysis to the generated DM logging data when testing the paging performance(S30). Many sample messages at a uniform interval are extracted among the logging data received from the mobile terminal to the DM. A primary sample message is selected as a reference message among the extracted sample messages. Residual sample messages except for the selected reference message are compared with a comparison message. It is confirmed whether the comparison messages remain. If the comparison messages remain, a primary comparison message among the remain comparison messages is compared with the reference message on the basis of a time and a slot number of the selected reference message. If a value for adding the slot number of the reference message to the calculated slot difference is equal to a slot number of the comparison message, a value of a counter is increased by 1. If the comparison messages do not remain, it is confirmed whether the reference messages remain. If the reference messages do not remain, a reference message having a maximum counter value is selected as a correct reference message. Times and slot numbers of all messages are corrected through a time and a slot number of the selected reference message for generating new DM logging data.
Patent KR-20010094120-A (KR)
Title: Advertising method by letter
Inventor: EUN JONG HO
IPC: H04B7/26
Filed: 2000-04-04
Abstract: PURPOSE: An advertising method using characters during a delay time is provided to display the information of a receiver as characters on the display window of a caller's portable phone by efficiently utilizing the delay time required until a call is connected between them. CONSTITUTION: Wired/wireless receivers(70,60) first store their information as characterized message data, and then apply for subscription to wired/wireless service providers. The messages of the wired/wireless receivers(70,60) are reported to the wired/wireless service providers. If an originating call from a portable phone caller(10) is transmitted to a wireless exchange(30) through a base station(20), the message of the wired or wireless receiver(70,60) is transmitted to the display window of the caller's portable phone through a wired or wireless exchange(40,30) and the base station(20) as characters until the call is connected.
Patent KR-20010095669-A (KR)
Title: A method for structuring scholarship contents apply screen through communication network
Inventor: RYU CHIL SU
IPC: G06F17/00
Filed: 2000-04-11
Abstract: PURPOSE: A method for constructing a learning contents providing screen on a communication is provided to construct a learning contents providing screen having a complex structure rapidly by constructing the learning contents providing screen in accordance with information being recorded in a cookie when a screen is updated or converted after recording constructing information about the learning contents providing screen in the cookie of a user computer. CONSTITUTION: If a user performs a log-in process by inputting an ID and password(S10), a learning contents providing computer searches whether a cookie value with respect to the final learning information of the user is stored in a database(S20). If a cookie value is stored in a database, the learning contents providing computer displays a screen guiding the final learning information of the user in accordance with the stored cookie value(S30). If the user selects a specific learning menu out of a screen of a main menu(S40), the learning contents providing computer creates a basic cookie for recording constructing information on a contents providing screen in an auxiliary memory of a user computer(S50). A learning contents providing screen of plural frames is constructed based on screen composition information being recorded in a cookie of the user computer(S60). The composition information on the learning contents providing screen being stored in the cookie of the user computer may be updated(S90).
Patent KR-20010096998-A (KR)
Inventor: CHO HAN SIN
IPC: H01Q17/00
Filed: 2000-04-19
Abstract: 본 발명은 자기손실이 큰 페라이트(Ni-Zn 페라이트, Co 2 Z를 포함하는 육방정계 페라이트) 분말과 순철 분말을 흡수 충진제로 사용하고, 상기 분말을 성형성이 우수한 결합재 또는 플라스틱 지지재에 혼입시킨 복합재료를 이용하여 소형 또는 간이 전파암실에 적합한 피라미드 형상의 광대역 전파흡수체로 사용함으로써, 종래의 전파암실에 사용되었던 흡수체에 비해 그 두께를 줄일 수 있고, 소결 페라이트 형상 제어시 발생되는 가공상의 어려운점을 해결함으로 인해 효율성이 있는 광대역 전파흡수체를 형성하는 동시에 사용자에 대한 사용상의 신뢰도를 극대화하는 페라이트와 결합재의 복합재료를 이용한 광대역 전파흡수체를 제공하는데 그 특징이 있다.
Patent KR-20000071798-A (KR)
Title: 압전 장치 및 그를 이용한 압전 발진자
IPC: H03B5/36
Filed: 2000-04-24
Abstract: 본 발명에 따른 압전 발진자는 부하 커패시터가 실장된 기판, 기판상에 배치된 부하 커패시터를 둘러싼 프레임, 및 프레임내에 배치된 금속 스프링 단자를 포함하며, 기판과 금속 스프링 단자 사이에 형성된 공간에 부하 커패시터가 수용된다. 또한, 본 발명에 따른 압전 발진자는 금속 스프링 단자에 배치된 압전 공진자를 포함한다. 금속 캡은 기판상에 배치되어 프레임을 덮으며, 그 내부면에는 돌출부가 형성되어 있다. 압전 공진자는 금속 스프링 단자 및 캡의 돌출부에 의해 고정된다. 금속 스프링 단자는 기판상에 형성된 전극 패턴의 하나에 전기적으로 접속되며, 캡은 기판상에 형성된 전극 패턴에 도전성 접착제에 의해 서로 접착되어, 압전 공진자 위에 형성된 두 개의 전극이 기판의 저면에 형성된 외부 전극에 접속된다.
Patent KR-20010102673-A (KR)
Inventor: KIM JONG SEON
IPC: H01L41/107
Filed: 2000-05-04
Abstract: 본 발명은 압전 변압기 등에 이용되는 압전세라믹에 관한 것으로, 그 목적은 유전상수, 기계적품질계수(Qm), 전기기계 결합계수(Kp)가 우수한 고출력이 압전세라믹 조성물과 이를 이용한 트랜스포머를 제공함에 있다. 
     상기 목적을 달성하기 위한 본 발명은 
     Pb[( ) x ( ) 1-x ]O 3 + yPbO + zMnO로 조성되고, x는 0.01∼0.05, y는 0.03∼0.6wt, z는 0.7wt이하로 이루어지는 고출력의 압전세라믹 조성물과, 
     상기 압전세라믹 조성을 갖는 압전체 블럭; 
     상기 압전체 블럭의 상측면의 중앙부에 형성되는 내부전극과 이 내부전극과 전기적으로 분리되어 외측에 형성되는 외부전극으로 이루어지는 제 1전극; 
     상기 압전체 블럭의 하측면에 형성된 제 2전극으로 이루어지는 트랜스 포머에 관한 것을 그 기술적요지로 한다.
Patent KR-20010103320-A (KR)
Inventor: BAE JUN IL
Filed: 2000-05-09
Abstract: 본 발명은 용강 정련용 래들의 벽체 및 바닥부위에 적용되면서 용강의 청정기능 향상과 함께 내식성 및 내소화성이 우수하고, 또한 시공성과 사용후 폐내화물의 활용이 용이한 불소성 돌로마이트-탄소질 내화물 및 그 제조방법에 관한 것으로, 본 발명의 내화물은 천연 돌로마이트를 800-1300℃로 1차 가열처리하고 이 하소물에 무기질 첨가제로서 Cr, Fe, Hf, Th, Ti, Zr의 산화물을 첨가하며 이를 Φ3-4cm 및 Φ7-8cm의 펠리트상으로 성형한 후 전기 아크로에서 2600℃ 이상으로 전융한 전융 돌로마이트를 주원료로 하고, 천연 전융 마그네시아 10-30중량, 인상흑연 1-6중량, 비수계 레진 1-6중량, 아민계 경화제 0.1-0.6중량, 붕화지르코늄계 산화방지제 0.1-1.0중량를 함유하는 것을 특징으로 한다. 또한, 본 발명의 제조방법은, 상기 천연 전융 돌로마이트 65-85중량, 천연 전융 마그네시아 10-30중량, 인상흑연 1-6중량, 비수계 레진 1-6중량, 아민계 경화제 0.1-0.6중량, 붕화지르코늄계 산화방지제 0.1-1.0중량를 배합·혼련한 후, 1000-1500kg/cm 2 으로 가압성형하고, 160-330℃의 청정 열풍으로 12-24시간 건조한 후, 그 표면을 비수계 석유화학 수지액으로 코팅하고, 이를 비닐대로 포장하는 것을 특징으로 한다.
Patent KR-20010029710-A (KR)
Title: Method and apparatus for converting low grade heat to cooling load in an integrated gasification system
Inventor: ASHOK KUMAR ANAND
IPC: F01K23/06
Filed: 2000-05-12
Abstract: PURPOSE: To use a cooling load for an auxiliary cooling demand in an integrated gasifying system by recovering an at least low quality level heat from a gas cooler to generate the load in the system. CONSTITUTION: In the integrated gasifying system, a thermal energy 154 is recovered from a gasifying/carbon removing device 112, and/or a thermal energy 156 is recovered from a gas cooling and/or gas state regulator 116, thereby improving an output of a bottoming cycle. Further, an absorbing cooling cycle 150 is driven by utilizing a low quality level heat 138 from the gas cooling and/or gas state regulator 116. If the heat 138 from the regulator 116 is limited, another low quality level heat can be obtained from a sub-system such as the removing device 112, a waste heat recovering device 162 or the like, and can be used as a heat source of the cycle 150.
Patent KR-20010106043-A (KR)
Title: Method for sending message to the other using different messenger program
Inventor: LEE YEON JEONG
IPC: G06F15/16
Filed: 2000-05-20
Abstract: Disclosed is a metal cabinet for storing documents and other articles which, in particular, can be assembled into a desired structure. The cabinet includes a knockdown cabinet main body (1) defining an open front end which comprises a back panel (2), side panels (3 and 4) attached to either side of the back panel (2), and top and bottom panels (5 and 6) which are attached to upper and lower ends of the back panel (2), respectively, across the side panels (3 and 4). The edges of the panels are provided with frame portions which can engage with each other. The back panel (2) is secured to the side panels (3 and 4), and the side panels (3 and 4) are secured to the top and bottom panels (5 and 6) via engagement members (45 and 52) provided in the respective frame portions.
Patent KR-20010014967-A (KR)
Inventor: ONO YOSHINORI
IPC: G05B23/02
Filed: 2000-05-24
Abstract: PURPOSE: A self-diagnosis device of vehicle and a diagnosis method using the same are provided to perform a self-diagnosis operation for an ECU(Electronic Control Unit) by performing a drive operation according to a drive pattern CONSTITUTION: A vehicle state detection portion(2) detects a state of a vehicle. An ECU(1) performs a diagnosing operation of a diagnosis device according to a predetermined drive pattern and the detected vehicle state. A diagnosis information processing portion(5) is connected with the ECU(1) in order to receives information and perform a display operation. The diagnosis information processing portion(5) displays a realized condition when a diagnosis execution condition is realized according to a corresponding drive pattern.
Patent KR-20000063226-A (KR)
Inventor: LEE JUNG HOON
IPC: A01G31/00
Filed: 2000-05-24
Abstract: PURPOSE: Provided is a cultivating method of bean sprouts by using vinegar, sea tangle, licorice root. CONSTITUTION: The cultivating method comprises the steps of impregnating black bean with a solution comprising 100 parts by weight of medicinal extract solution and 1 parts by weight of vinegar for 4 hours; and then sprouting it in a jar.
Patent KR-20010107092-A (KR)
Inventor: CHA SEUNG SIK
IPC: F28F9/00
Filed: 2000-05-25
Abstract: 본 발명은 수소저장합금을 이용한 냉난방기의 열교환관에 관한 것이다. 
     종래의 수소저장합금을 이용한 냉난방기의 열교환관은 내부에 수소저장합금 분말 투입공을 가진 칸막이 링을 다수 삽입 설치하여, 분말 투입공을 통하여 수소저장합금 분말을 투입 시켰으므로, 투입시간 과다 소요와 번거로움이 따랐던 것이다. 
     이에 본 발명은, 수소저장합금 분말을 내장하는 열교환관을 구성함에 있어서, 
     열교환관 내벽에 나선형 돌부를 제법 길게 형성하고, 열교환관 중앙부에 미세한 통기공을 가진 망으로된 관을 삽입 설치하여 나선형 돌부의 끝단부가 망으로 된 관의 외경부분에 밀착되게끔 구성함으로써, 수소저장합금을 투입시킬 때 나선형돌부에 의해 매우 신속 간편하게 투입시킬수 있는 열교환관을 제공할수 있게 하는 것이다.
Patent KR-20000077442-A (KR)
Title: 반도체 메모리 장치
IPC: G11C11/56
Filed: 2000-05-26
Abstract: 복수의 비트들을 저장하는 다가(multi-valued) 메모리 셀을 갖는 본 발명에 따른 반도체 메모리 장치는,  입력 어드레스 신호가 복수의 비트들중에서 상위 데이타를 지정하는지 또는 하위 데이타를 지정하는지를 판단하는 인식 장치, 상기 입력 어드레스 신호에 대응하는 워드 라인들을 선택하여,  상기 인식 장치의 결과에 대응하는 복수의 워드 라인 전압 레벨들 중에서 상위 데이타 또는 하위 데이타를 독출하는 데에 필요한 워드 라인 전압들만을 선택된 워드 라인들에 인가하는 로우 선택 장치, 상기 입력 어드레스 신호에 따라 비트 라인들을 선택하는 컬럼 선택 장치 및 상기 선택된 비트 라인들의 레벨들에 따라 출력 데이타를 생성하는 출력 장치를 구비한다.
Patent KR-20010108551-A (KR)
Inventor: LEE JAE YOUNG
Filed: 2000-05-29
Abstract: 본 발명은 무선통신 단말기의 착신상태에 따른 착신표시 발광램프(LED)의 동작을 감지하여 무선통신 단말기의 착신상태를 근거리 지역에서 무선(RF)으로 인식할 수 있도록 함으로써 무선통신 단말기의 이용 편리성을 향상시킨 무선통신 단말기의 착신감지 통보장치 및 방법에 관한 것이다. 
     한편, 본 발명은 무선통신 단말기에 악세서리 형태로 다양하게 부가(부착)되며 무선통신 단말기의 착신에 따른 무선통신 단말기 발광램프의 동작을 감지, 이를 근거리 지역으로 무선(RF) 송신하는 착신감지장치와, 상기 착신감지장치에 대응되고 다양한 형태를 가지며 상기 착신감지장치에서 송신한 무선 신호를 감지하여 이에 따른 신호, 예를 들면 소리, 빛, 진동 등의 신호 즉 착신통보를 해 주는 착신통보장치를 포함하여 구성되는 무선통신 단말기의 착신감지 통보장치 및 방법에 관한 것이다.
Patent KR-20000058487-A (KR)
Inventor: LIM SOO MIN
IPC: G06F1/00
Filed: 2000-06-02
Abstract: PURPOSE: An internet IP router is provided to be capable of conducting a stable sharing as if a separate router when sharing programs of a user's computer are operated by a user's application program and a multi task. CONSTITUTION: An internet IP router comprises a private case which has a bypass port(8), an input/output port(9) and various display lamps(14). In the private case are reassembled a main board(12), an input/output card(6), a lamp(7), a floppy disk drive(2), a power supply(15) which are collected from a main body of an odd-fashioned computer. Three or four LAN cards(4) are inserted in the private case. At a floppy disk drive(2) is mounted a disk(3) which has a sharing program.
Patent KR-20010111112-A (KR)
Inventor: KIM DONG O
Filed: 2000-06-07
Abstract: 본 발명은 광고 기능을 갖는 케이블 텔레비젼 방송 시스템에 관한 것으로, 송출하고자 하는 방송신호의 블랭킹 구간에 광고화면 데이터를 삽입하여 송신하는 케이블 방송신호 송신부와, 선국 채널 방송신호의 블랭킹 구간에 삽입된 광고화면 데이터를 검출하여 메모리에 저장하고, 텔레비젼 수상기의 세트 조작명령시마다 저장된 광고화면 데이터를 독출하여 출력하는 케이블 텔레비젼 컨버터와, 사용자의 세트 조작명령 수신시 상기 컨버터로 세트 조작명령을 전송하고 그에 응답하여 수신되는 광고화면 데이터를 표시부상에 표시해 주는 텔레비젼 수상기로 구성함으로써, 한 번의 제품광고 혹은 기업광고만으로도 반복적인 광고효과를 얻을 수 있는 특징이 있다.
Patent KR-20010111181-A (KR)
Inventor: PARK GWANG SIK
Filed: 2000-06-08
Abstract: 본 발명은 하나의 직렬버스를 통해 연결된 여러 기기의 기능을 통합적으로 제어하는 시스템에서 원하는 제어 명령을 보다 편리하게 하달하고, 어떠한 기기에 새로운기능이 추가되는 경우에도 능동적으로 대처할 수 있도록한 오디오/비디오기기의 제어 기술에 관한 것이다. 
     이러한 본 발명의 목적은, 다수의 오디오, 비디오 기기가 IEEE-1394 직렬 버스를 통해 접속된 시스템에서, 그 IEEE-1394 직렬 버스가 리세트된 이후에 명령어 세트와 기기 리스트를 테이블화 하는 제1단계와; 리모콘을 통해 기능 수행 명령이 입력될 때 상기 테이블의 정보를 근거로 하여 해당 기능을 수행할 수 있는 기기들을 표시하는 제2단계와; 상기 리모콘을 통해 기기 선택 명령이 입력될 때, 표시된 기기 중에서 해당 기기에  기능 수행 명령을 하달하는 제3단계에 의해 달성된다.
Patent KR-20000058564-A (KR)
Inventor: LEE HYO GYEONG
IPC: G06F17/00
Filed: 2000-06-14
Abstract: PURPOSE: A device for securing broadcasting contents based on world wide web using remote unmanned camera and web casting method using it are provided to cover live an image and voice information of object in real time, by controlling remote unmanned camera by a remote control program installed in PC and determining the photographing position of object. CONSTITUTION: A device for securing broadcasting contents based on world wide web using remote unmanned camera is composed of a camera control input(11), an interface(12), a remote photographing executive unit(14), a data receiver(15) and a data memory(16). The camera control input(11) transmits an information for controlling the photographing position of remote unmanned camera. The interface(12) receives the information, connects to a management system(13) and transmits to the remote photographing executive unit(14). The remote photographing executive unit(14) determines the photographing position of remote unmanned camera and transmits an image and voice information of object to the data receiver(15). The data memory(16) stores the information.
Patent KR-20010112763-A (KR)
Title: Multimedia data transmission method and system with the feature of stable bandwidth based on method of separating, accommodating protocols
Inventor: DOO IL CHEOL
IPC: H04L12/407
Filed: 2000-06-15
Abstract: A pile fabric which comprises a ground portion comprising wefts and warps of nontwisted or interlaced polyester filaments having a torque of zero or as low as 100T/m or less disposed in a flat form. This fabric is free from the feeling of the thickness of the ground as experienced in the use of the conventional spun yarns, has excellent formability and sewability, and enables a small pile length (less than 1.5 mm). Specifying the thickness of the constituent filament and the yarn form for pile yarns can realize a variety of pile fabrics like velvet, amunzen, astrakhan, or suede.
Patent KR-20000054740-A (KR)
Inventor: KIM HAENG KON
IPC: G06F15/16
Filed: 2000-06-21
Abstract: PURPOSE: A method for managing network information is provided to reduce load of an entire network by using a resource registry applying a call-back concept of a common object request broker architecture(CORBA) to perform accessing processes on the web according to resource characteristics and specified information, and by using a real-info manager to buffer data transmitted from a real-time server to generate the data as input formats of user applets. CONSTITUTION: A method for managing network information using a real-info manager and a resource registry under a Web environment, comprises the steps of: making a first hierarchy user use a web browser adopting a Java virtual machine to access a web server of a resource required by the user, and making the user receive a related applet to operate the applet on the Java virtual machine, then setting up a first step for using resources; connecting a second hierarchy functional server group to an object request broker(ORB) through an internet environment, and examining resource availableness in resource lists of the resource registry to access a database server group; making a third hierarchy database server group process updated data, according to an event having the corresponding data in a second hierarchy real-info manager, to supply resource services in real time to users by reciprocal operations with the resource registry, and making the third hierarchy database server group transmit the processed data to a Java Applet of a first hierarchy web client.
Patent KR-20020006099-A (KR)
Title: Head of fire extinguisher
Inventor: SIM JAE HO
IPC: A62C13/00
Filed: 2000-07-11
Abstract: PURPOSE: Extinguisher head structure is provided to softly open a valve by dropping an elevating bar in pushing an actuating handle and to exactly measure pressure gauge by preventing supplying extinguishing liquid into a pressure inducing hole. CONSTITUTION: Extinguisher head structure comprises a fixed handle(126) mounted on an extinguisher; a center pin(122) installed on the extinguisher; an elevating bar(113) dropping or lifting while pressing an actuation handle(121); a valve(114) smoothly opened by a bushing(111); a discharging passage(104) mounted on a head(102); an upper screw unit(105) formed on an upper portion of the discharging passage by being connected to the bushing; a placing groove(106) inserting an end portion of the bushing; a packing(112) arranged on the placing groove; a dividing protrusion(110) formed between the placing groove and the upper screw unit; a pressure gauge(124) measuring pressure of extinguishing fluid contained in a tank(101); and a pressure inducing hole(109) connecting an end portion of a screw pipe(117) to an engaging hole(107).
Patent KR-20020010001-A (KR)
Title: Portable radiotelephone with mountable pen type sub housing having a transmitting/receiving module
Inventor: PARK SEUNG MIN
IPC: H04B1/38
Filed: 2000-07-28
Abstract: PURPOSE: A terminal having an attachment and detachment pen type auxiliary housing in which a transmitting and receiving unit module is installed is provided to offer the pen type auxiliary housing capable of performing a wireless communication using a bluetooth module in a body. CONSTITUTION: A receiving portion composed as a subcylindrical receiving space extended in a length direction and a closed end for covering a part of the receiving space is composed in one direction of a main housing(10). A pen type auxiliary housing(20) composes a receiving unit at its one end and a transmitting unit at its other end, and has one ore more keys between the transmitting and receiving units. An RF unit and a bluetooth module for a local area wireless communication are installed in the pen type auxiliary housing(20), and the pen type auxiliary housing(20) is attached and detached from the receiving portion. One or more charge terminals combines the main housing(10) with the pen type auxiliary housing(20).
Patent KR-20020011663-A (KR)
Title: Providing method for using service of sports center on internet and its system
Inventor: PARK IN CHEOL
Filed: 2000-08-03
Abstract: PURPOSE: A method and system for using a sports center on the Internet is provided to increase the convenience of a customer by enabling the customer to freely select a sport center or a sport event on the Internet, and by enabling the customer to conveniently use the sport center and the sport event provided from the sport center. CONSTITUTION: A user connects to a server through the Internet(101). The user selects a sport center or a sport event to be used(102). The user pays the expenses for the sport center or the sport event selected(103). Information on the sport center or the sport event paid by the user is stored in a database(104). A card for identifying the user is issued on the basis of the information stored in the database(105).
Patent KR-20020012021-A (KR)
Title: internet site collecting medical informations for medical doctors, medical students and other related persons
Inventor: KIM JEE HYOUNG
IPC: G06F17/00
Filed: 2000-08-05
Abstract: PURPOSE: A learned journal site for doctors, medical students and other related individuals is provided to introduce the translated correspondence courses of pre-used questions, textbooks and related books for doctors, medical students and professors. CONSTITUTION: The pre-used questions of a test are collected and sorted systematically through voluntary reporting of members and the existing publications. The explanations, answers and reference documents by the voluntary reporting are introduced. The textbooks and required books of each course are sorted, reported, translated and introduced to all of members. The correspondence courses of each university are collected, displayed or corrected. The textbooks and related books are bought. The used books and the medical meetings are introduced.