baber/WOPTO huggingface dataset:
Patent KR-20010075919-A (KR)
Title: Current limit circuit of inverter refrigerator
Inventor: JIN BYEONG YEOP
IPC: H02P6/08
Filed: 2000-01-21
Abstract: PURPOSE: A current limiting circuit for inverter refrigerator is provided, in which power element is instantaneously turned off when the current is higher than a preset level, to thereby improve start-up ability of the compressor and protect the motor from over current. CONSTITUTION: A current limiting circuit comprises a rectifying unit(10) for rectifying the input AC power by using a bridge diode and outputting the rectified DC voltage; a smoothing capacitor(C) for smoothing the DC voltage output from the rectifying unit; a power unit(11) for supplying gate driving voltage for the switching element of an inverter unit(13); a gate driving unit(12) for outputting the gate driving voltage of the power unit into a switching control signal in accordance with the pulse width modulation signal of a micro computer(300); the inverter unit which is controlled on/off by the switching control signal of the gate driving unit, and converts and outputs DC voltage of the smoothing capacitor into three-phase AC power required by a motor(M) which is driven by the three-phase AC power output from the inverter unit; a position/speed detector(14) for detecting position and speed of the rotor of the motor; a current detection unit(100) for detecting the current flowing at the switching element of the inverter unit; a current limiting unit(200) for receiving the current detection signal output from the current detection unit, comparing the received current with a preset current level and outputting a current limit signal in accordance with the comparison result; and the micro computer which outputs a pulse width modulation signal in accordance with the result of comparison between the rotor position and speed and the desired phase angle and phase difference, instantaneously turns off the duty of the pulse width modulation signal in accordance with the current limit signal output from the current limiting unit, and outputs the corresponding pulse width modulation signal.
Patent KR-20010076891-A (KR)
Title: Apparatus for estimating bit error rate in orthogonal frequency division multiplexing communication system and mothod thereof
Inventor: CHO EUN I
IPC: H04L27/26
Filed: 2000-01-28
Abstract: PURPOSE: An apparatus and a method of measuring bit error rate in an OFDM communication system are provided which compares a reference pilot pattern with a demodulated received pilot pattern using a pilot channel used in an OFDM transmission system to easily measure bit error rate. CONSTITUTION: An apparatus of measuring bit error rate in an OFDM communication system includes a transmitter and a receiver. The transmitter has a pilot pattern inserting part for inserting a predetermined first reference pilot pattern into the sub-channel of input data, and an OFDM modulator for OFDM-modulating the transmission data into which the reference pilot pattern was inserted and transmitting the data by frames. The receiver includes a pilot pattern detector(20) for OFDM-demodulating the data symbol to detect only the pilot pattern, and a bit error rate calculator(28) for comparing a predetermined second reference pilot pattern with the demodulated pilot pattern to detect and accumulate the number of pilot errors and dividing the number of pilot errors by the total number of received pilot patterns to measure bit error rate.
Patent KR-20010077463-A (KR)
Title: Manufacturing method for stratum of fluorescence plasma display panel
Inventor: SONG YONG
IPC: H01J9/24
Filed: 2000-02-02
Abstract: PURPOSE: A method of fabricating a fluorescent layer of a plasma display panel is provided, which simplifies a process of forming the fluorescent layer on a front substrate to improve productivity and prevents losses of the material of the fluorescent layer. CONSTITUTION: A back substrate of a plasma display panel on which a plurality of barrier walls are arranged is prepared. Three screen masks(30) in which holes(31) corresponding to the spaces between the barrier walls are formed are provided. The first screen mask is arranged on the barrier walls, the holes of the first mask corresponding to the spaces between the barrier walls. A red fluorescent material is filled in the holes formed in the first screen mask. The second screen mask is arranged on the barrier walls, the holes of the second mask corresponding to the spaces between the barrier walls. A green fluorescent material is filled in the holes formed in the second screen mask. Then, the third screen mask is arranged on the barrier walls, the holes of the third mask corresponding to the spaces between the barrier walls. A blue fluorescent material is filled in the holes formed in the third screen mask. The back substrate is inserted into a burning furnace to be burned.
Patent KR-20010049204-A (KR)
Inventor: LEE JONG SO
IPC: F16K31/00
Filed: 2000-02-08
Abstract: PURPOSE: A valve opening/shutting-off device is provided to save cost by compacting the size and structure of a valve. CONSTITUTION: A valve opening/shutting-off device includes a linear shape memory member(10) whose length is reduced at a temperature over a specific degree rather than at a normal temperature and having one end fixed in a valve housing(5), a connecting member for connecting the shape memory member with a valve member(52), and a heating unit for heating the shape memory member over a specific temperature. At a normal temperature, a valve is placed in a closed position according to the length of the shape memory member. If the shape memory member is heated, the valve is placed in an open position. According to a compact structure, production costs are reduced.
Patent KR-20010084511-A (KR)
Title: High speed and long distance transmission apparatus for exchange system
Inventor: CHOI CHUN GI
IPC: H04M7/00
Filed: 2000-02-26
Abstract: PURPOSE: A high-speed long distance transmission apparatus between racks in an exchanging system is provided to enable high-speed long distance transmission between racks by using twin-ax cables. CONSTITUTION: A signal amplifying part(22) of a signal compensating part(30) amplifies a transmission signal transmitted from a Tx terminal of the first connector(20). A signal equalization part(24) of the signal compensating part(30) generates a compensating signal compensated attenuation and dispersion of the amplified signal due to differences in propagation of high frequent and low frequent components and long-distance transmission, to a Tx terminal of the second connector(28). A signal regeneration part(26) regenerates a signal transmitted from twin ax-cables through an Rx terminal of the second connector(28) as a standard ECL(Emitter Coupled Logic) signal used at an exchanging system.
Patent KR-20010087543-A (KR)
Title: A digital radiation image processing apparatus
Inventor: LEE SUNG HO
IPC: A61B6/03
Filed: 2000-03-07
Abstract: PURPOSE: An apparatus for processing a digital radiation image is provided to remarkably reduce the exposed degree of a radiation of a user by using a relatively small radiation. CONSTITUTION: A slit(211) prevents the scattering of a radiation by guiding a constant amount of radiation into a predetermined space formed on the upper portion of a shielding film. A protective cover(212) is made of a transparent material so that the radiation transmitted through the slit(211) penetrates the protective cover(212). A phosphor(213) converts the radiation into a visible light by responding to the radiation transmitted through the protective cover(212). A photo conductor(214) converts the visible light generated from the phosphor(213) into a corresponding electric signal. The photo conductor(214) is utilized as a solid state photoelectric conversion device. A photo diode could be used in lieu of the photo conductor(214).
Patent KR-20010020652-A (KR)
Inventor: ITO JINICHI
IPC: H01L27/10
Filed: 2000-03-09
Abstract: PURPOSE: A semiconductor device is provided to have a layout structure that the patterning of memory cells can be performed in a highly controllable state. CONSTITUTION: In a memory cell array region(1), the pattern of the element components, that is active regions (10-15 and 21-23) and polysilicon regions (31-42), of each unit memory cell and the pattern of the dummy cell of a dummy cell region(3) for outer periphery are made equal to each other and both patterns have an axisymmetrical relation with respect to their boundary line(BC1). In addition, the pattern of each unit memory cell in the memory cell array region(1) and the pattern of the dummy cell in a piling region(2) are made equal to each other and both patterns have an axisymmetrical relation with respect to their boundary line(BC2).
Patent KR-20010088775-A (KR)
Title: advision
Inventor: KIM JIN GYU
IPC: H04N7/20
Filed: 2000-03-21
Abstract: PURPOSE: A method and an apparatus for displaying advertisement in accordance with words used by characters when showing radio/cable broadcasting and a movie using a satellite and an Internet are provided to provide a simple and one-way video together with advertisement and information when showing broadcast or movie, etc for enhance time and economical merits as well as increase the profit of an advertiser and a service provider by creating new values. CONSTITUTION: In a sky wave broadcast, a satellite broadcast, a cable broadcast, an Internet TV and a movie screen, advertisement and information service are transmitted, relayed, exchanged and received in accordance with words used by characters. A receiver for viewers consists of a video receiver such as a general TV receiver, a satellite TV receiver, a PC, a cellular phone and a movie screen, and receive technique therefor.
Patent KR-20010094382-A (KR)
Title: Electronic transaction application apparatus and method
Inventor: JUNG SEUNG SU
Filed: 2000-03-30
Abstract: PURPOSE: An apparatus and method for supporting electronic commerce are provided to effectively manage the electronic commerce by linking a plurality of small and medium manufacturing companies with a plurality of small and medium sales centers by a communication network. CONSTITUTION: A commodity information storage device(220) stores commodity information. A member information storage device(230) stores information of a manufacturing company, a store, and a delivery company, which are registered as members. A commodity information obtaining device(240) obtains commodity information from the manufacturing company and stores it in the commodity information storage device(220). A commercial transaction processor(250) controls a selling order when a selling order of a desired commodity is requested. An order processor(260) transmits the commodity information to a corresponding manufacturing company and delivery company. A settlement processor(270) manages a settlement process. A commercial transaction controller(210) controls operations of the devices and connections of the devices.
Patent KR-20000037138-A (KR)
Inventor: PARK YUNG JA
IPC: G06F3/14
Filed: 2000-04-08
Abstract: PURPOSE: Self window is provided to eliminate the waste of the time by controlling the self window which have no background image and have various forms. CONSTITUTION: 'My window' interface is a program supporting two functions. A first function is to enable users to build a window with or without separate background from the windows of display, and with variable size and type. A second function is to enable users to control the window, such as calling the window and making the window stay on monitor display at any time. Users can exchange motion pictures or images between family members or friends, connect to favorite sites without another contact, and see hot news, notification, ads, and so on utilizing the time and space wasted in the process of internet connection, loading, or output through the window.
Patent KR-20010095597-A (KR)
Title: Unloading system of accessories for machine tool
Inventor: KIM BYEONG GAK
IPC: B66C1/00
Filed: 2000-04-11
Abstract: PURPOSE: A device for withdrawing components for a component processor is provided to conveniently withdraw a product from the processor by being connected to a lifting unit for easily processing work. CONSTITUTION: A component withdrawing device for a component processor comprises a cylinder(15) connected to a lift unit(11); a clamp(30) clamping components processed by being engaged with a lower portion of the cylinder; a pair of levers(30) connected to a rod(16) of the cylinder on a middle portion in a case(31) of the clamp(30); a cover(35) arranged on the case front and back of the case by being connected to a lower portion of the lever with a hinge(34); a long hole(36) mounted on the cover; a jaw(33) catching the processed product by being connected to the long hole with a pin(37); and a chucking bracket(42) compressing the jaw by being installed on outside of the jaw and the lever. Thereby, the component withdraw device for a component processor withdraws a product from the processor by being connected to a lifting unit for easily processing work.
Patent KR-20000071703-A (KR)
Title: Water-in-oil emulsified cosmetic
Inventor: OMURA TAKAYUKI
IPC: A61K8/00
Filed: 2000-04-14
Abstract: PURPOSE: A water-in-oil type emulsification cosmetic material able to emulsify great quantity of water in broad range of oil component from polar to nonpolar oils is provided for serving moisture to hair or skin and high scorch stability by comprising the composite of amphoteric and/or semi-polar surfactants and higher fatty acid. CONSTITUTION: The water-in-oil type emulsification cosmetic material for providing moisture to hair or skin and having high scorch stability comprises the composite of amphoteric and/or semi-polar surfactants (formulas 1-6) and higher fatty acid in a weight ratio of 0.5:9.5 to 9.5:0.5 of the fatty acid to the surfactants; and inorganic salt such as sodium chloride, potassium chloride, calcium chloride, aluminum chloride, sodium sulfate, potassium sulfate, magnesium sulfate and aluminum sulfate and/or amino acid salt. The water-in-oil cosmetic material contains water in the weight content of 70.0 wt.% in terms of total weight of the material.
Patent KR-20010093608-A (KR)
Title: System and method for providing purchase programs for a plurality of businesses
Inventor: CHUNG SUNG HWA
Filed: 2000-04-18
Abstract: PURPOSE: A system for providing purchase programs for a plurality of companies and a method therefor are provided to purchase goods and service items at different discount levels from member companies in which subscribing group employees are subscribed and member companies in which subscribing group employees are not subscribed by registering the member companies for providing their goods to their employees at one discount level and providing their goods to employees of other member companies at the other discount level. CONSTITUTION: An EMPS(Employee Multiple Price System) stores price data of goods or service items for a plurality of member companies. An EVS(Employee Verification System) discriminates a member company for employing a user and receives the request for data by the user, items of the discriminated company, or items of other companies. A shopping module retrieves employee price data or non-employee price data from the EMPS module according to the request for data received by the EVS module.
Patent KR-20000077057-A (KR)
IPC: H03M7/30
Filed: 2000-04-20
Abstract: 협대역신호의 샘플링주파수 8kHz, 광대역신호의 샘플링주파수가 16kHz이고, 협대역 여진원이 300∼3400Hz로 제한된 것으로 한다고 하면, 광대역 여진원은 300∼3400Hz 및 4600∼7700Hz가 되고, 특히 3400∼4600Hz의 중역에 갭이 생긴다. 
     이 음성합성장치에서는, 잡음부가부(62)에서, 3400∼4600Hz의 주파수대역을 갖은 잡음신호를 생성하고, 이득조정을 행하고, 제로채우기부(61)에서의 제로채운후의 여진원(excW)에 가산한다.    이것에 의해 얻어지는 광대역 여진원(excW')은, 보다 플랫에 접근하고 있다.    이득조정은, 협대역 여진원 혹은 제로채운후의 여진원의 파워를 구하는 등을 행하고, 이것에 따른 값으로 한다.
Patent KR-20010097234-A (KR)
Inventor: JUNG KWAN SEEN
IPC: H04L12/54
Filed: 2000-04-20
Abstract: 본 발명은 수신자가 발신자의 이메일에 첨부된 CGI실행장치를 사용하여 답신메시지 입력창에 메시지만 작성하고 다시 발신자에게 반송하게 되므로 수신자는 발신자의 이메일주소나 휴대폰번호를 기재할 필요가 없어 편리하고, 또한 발신자의 자신의 개인적 정보, 특히 타인의 장난이나 불필요한 목적에 사용될 가능성이 많은 이메일주소와 핸드폰번호를 노출하지 않아도 되는 효과를 가지며, 또한 급하게 받고싶은 반송메일을 보내놓고 단말기 앞을 떠나지 못하는 불편함을 해소할 수 있는 매우 편리하고 유용한 발명인 것이다.
Patent KR-20010097666-A (KR)
Inventor: AHN GUK YEONG
IPC: F23J15/00
Filed: 2000-04-25
Abstract: 본 발명은 질소산화물 저감과 화염의 안전성을 위한 연소 장치 및 그연소 방법에 관한 것으로,  본 발명에 따른 연소 장치는 연소실, 버너, 배기 덕트, 연료 공급라인 및 배기가스 주입 수단을 구비한다.  버너는 연소실에 설치된다.  버너에는 연료 공급 라인이 연결된다.  연소실에는 배기 덕트가 설치된다.  배기가스 주입 수단은 배기 덕트를 통해 배기되는 총 배기가스에서 일정량을 뽑아서 연료 공급 라인에 주입하기 위한 것이다.  이 수단은 배기 덕트와 연료 공급 라인을 연결하기 위한 라인과,  연결 라인상에 설치되고 배기 덕트로 흐르는 배기가스를 강제로 흡입하기 위한 송풍기 및 연결 라인상에 설치되고 흡입된 배기가스 양을 제어하기 위한 유량 제어기를 구비한다.
Patent KR-20010099553-A (KR)
Inventor: AHN KYUNG MO
IPC: G09B25/00
Filed: 2000-04-28
Abstract: 본 발명은 멜로디 재생장치를 갖는 민속 공예품에 관한 것으로, 그 목적은 전통 타악기로 이용되는 장구 내지 북을 축소된 모형구조로 형성하여 장식적인 효과를 부여되도록 하고, 특히 그 내부로 악기 고유의 원음발생을 위한 멜로디 재생장치를 내설되도록하여, 민속문화를 알리기 위한 민속 공예품 내지 관광 기념품 등으로서 그 이용범위를 확대되도록 함과 동시에 상기, 멜로디 재생장치에 의한 고유의 원음 발생으로 물품에 대해 생소함을 갖는 일부 사용자(외국인 등)들에게 물품의 특징 및 사용 용도를 명확히 전달시킬수 있도록 한 멜로디 재생장치를 갖는 민속 공예품을 제공함에 있는 것이며, 또 다른 목적으로는 멜로디 재생장치로 부터 악기 고유의 원음을 출력되도록 함에 있어, 자석을 장착한 장구채 또는 북채의 자력과 마그네틱 스위치위의 접촉에 의해 실제 물품과 동일한 사용관계로서 음향효과를 출력되도록 하여 제품의 구매욕구를 증대시킴과 동시에, 그 사용관계에 있어 유희감 또한 상승시킬수 있도록 한 멜로디 재생장치를 갖는 민속공예품을 제공함에 있는 것이다. 
     이에, 상기 목적을 달성하기 위한 본 발명의 구체적인 수단으로는; 
     한쌍의 울림통을 구비한 장구본체를 모형 장식구조로 형성하여 받침판에 의해 고정 설치되도록 한 것에 있어서; 
     상기, 장구본체의 울림통 내에 외부 작동신호를 전달받는 스위치 구조로서 신호입력장치를 형성시키고, 상기 신호입력장치와 단자연결되어 입력된 신호에 따라 음향 출력기능을 행하는 음원칩을 장착한 음향재생장치를 형성시키며, 상기 음향재생장치와 단자 연결되어 상기 음원칩으로 부터 재생되는 음향을 외부로 확산되도록 하는 스피커를 형성시키고, 상기 신호입력장치와, 음향재생장치와, 스피커를 구동시키기 위한 수단으로 상기 받침판 내부에 전원부를 구성되게 하므로서 달성된다.
Patent KR-20010104439-A (KR)
Inventor: LEE SANG MIN
Filed: 2000-04-27
Abstract: 본 발명은 폴터형 휴대 전화기의 열 소산 장치에 관한 것으로, 전화기 내부에 있는 M.C.M (multi chip module)에서 발생하는 열이 신체로 복사되지 않고, 전화기 내부의 내장된 히트 파이프(heat pipe)를 통하여, 힌지결합된 전화기의 LED 후면에 장착된 열 소산판으로 열이 전도되어, 전화기의 열을 외부로 소산하여 주므로, 사용자가 장시간 전화을 사용하여도 신체로 열이 복사되지 않아, 쾌적한 상태로 전화기를 사용할 수 있도록 한 것이다.
Patent KR-20010105615-A (KR)
Title: Refrigerator with vegetable storage part
Inventor: PARK DEOK GEUN
IPC: F25D11/00
Filed: 2000-05-16
Abstract: Arrangement for enhancing the steering effect of ship rudders (5) comprising at least one passageway for supplying seawater from a pump to ducts (11) in the rudder, and means (20) communicating with the ducts and being adapted to discharge seawater supplied through these at the rudder surface. Said means comprise a profile element (20) extending preferably vertically at the leading edge of the rudder (5) and being pivotable about a generally vertical axis to extreme positions at either side with respect to the central plane of the rudder. Moreover, there are provided distribution ducts (12A, 12B) which in association with the profile element (20) are adjustable so that the profile element by opposite pivot movement in relation to the angular deflection of the rudder causes seawater to be discharged (12X) along the rudder surface (5B) facing abaft at said angular deflection.
Patent KR-20010106623-A (KR)
Inventor: YOON JUNG HAN
IPC: A61F2/06
Filed: 2000-05-22
Abstract: 본 발명은 순환기 질환 중 관상동맥 질환에 의한 협심증이나 심근 경색증의 치료에 이용되는 금속으로 만들어진 중재적 치료 기구인 "스텐트"에 관한 것으로, 얇은 두께의 원통형 구조를 갖는 일체형의 스텐트에 있어서, 원주 방향 팽창성을 부여하는 반복되는 지그-재그형의 만곡부를 갖는 스텐트 단위 2개를 동형의 만곡부에서 연결 스트럿으로 연결한 기본 단위를 이형의 만곡부의 외곡면에서 훅 모양의 연결 스트럿으로 연결하여 이루어지는 것을 특징으로 하는 관상동맥 설치용 스텐트인 것이다. 
     본 발명에 따른 관상동맥 설치용 스텐트는 종래의 스텐트와는 다른 고유한 형태로서 기계적으로 시술 후 혈관 내에서 충분한 방사상의 지지력을 확보하고, 또한 기능적으로는 스텐트 스트럿 표면에 요철 또는 스텐트 스트럿에 천공 처리를 하여 국소약물 전달을 위한 폴리머를 근간으로 하는 약제의 도포 또는 삽입을 효율적으로 하는 스텐트로서, 종래의 스텐트를 사용하는 시술에 비하여 재협착율 및 신내막 증식을 효과적으로 낮출 수 있다.
Patent KR-20010107343-A (KR)
Title: 네트워크로 ｔｖ화상 전송을 위한 시스템연결 방법 및제어장치
Inventor: PARK CHONG CHUL
Filed: 2000-05-26
Abstract: 본 발명은 네트워크로 TV화상 전송을 위한 시스템 연결방법 및 제어장치에 관한 것으로, PC방이나 사무실 등에서 컴퓨터를 이용해서도 TV 방송을 볼수 있게 함에 목적이 있다. 
     이러한 목적의 본 발명은 TV방송 신호를 수신하는 부분과 이 TV방송 신호를 컴퓨터용 신호로 변환해 주는 부분과 여러 사용자 컴퓨터가 연결된 허브 부분으로 구성되어 있다. 
     본 발명을 통해 인터넷을 통한 TV방송보다 보다 양질의 TV화상을 청취할 수 있으며 여러 컴퓨터를 통해 TV시청이 가능한 효과가 있다.
Patent KR-20010109054-A (KR)
Title: 당첨 확률이 100%인 연동식 복권 판매 방식
Inventor: LEE KYUNG SOO
Filed: 2000-05-30
Abstract: (1) 발명이 속하는 기술 및 발명의 구성 
     당첨 확률이 100%인 복권 판매 방식으로서 본 발명은 인터넷상에서 무료로 복권을 발행 판매하되 당첨 확률이 100%인, 인터넷 비즈니스 모델에 관한 것이다. 먼저 인터넷상에서 네티즌이 일정금액을 주고 유료로 복권을 구입한 뒤 그 복권의 당첨 여부를 확인 하였을 때 최초 유료로 주고산 금액은 반드시 당첨이 되는 것이다. 최초 유료로 복권을 매입할 때 매입 금액은 복권을 발행하는 곳에서 빌려주며, 네티즌은 돈을 전혀 사용하지 않고도 유료 복권을 무료로 이용할수 있는 것이다. 
     예컨대 유료 복권이 무료로 운영될수 있는 방법은 다음과 같다. 
     첫째, 네티즌이 인터넷상에서 복권을 유료로 구입하고 예를 들어 장당 5백원하는 복권을 구입하고 그복권을 확인하여 5백원이 당첨 되었을때 그 5백원으로 네티즌이 다시 복권을 구입하는 계속적인 연동 방식으로 네티즌이 당첨 금액으로 다시 또 복권을 구입하는 연동 방식이다. 
     둘째, 네티즌이 복권을 구입하여 당첨 여부를 확인할 때 복권 뒤쪽화면이나 옆에 배너 광고나 그와 유사한 광고를 네티즌에게 무의식중에 보여줌으로서 광고주는 광고의 효과를 기대할 수 있고 네티즌은 유료를 무료로 복권을 매입 할수 있는 것이다. 
     (2) 발명의 효과 
     인터넷상에서 복권을 구입하는 네티즌은 당첨이 확실한 복권을 구입하기에복권을 구입하는데 있어서 경제적인 부담이 없을뿐 아니라 기존의 광고를 보고서 복권을 구입하는 방식보다는 네티즌들이 싫증을 느끼지 않는 효과가 있겠으며, 복권을 구입하여 스트레스가 쌓이는 것을 예방할수 있고 복권을 즐기면서 이용할수 있는 것이다.
Patent KR-20010077828-A (KR)
Title: Method and apparatus of education using internet email and push technology
Inventor: KIM CHUN YOUNG
Filed: 2000-06-09
Abstract: PURPOSE: A method and a device for an education using an E-mail and a push technique of the Internet are provided to offer an education through the Internet by using an Internet E-mail transmission program and a push technique or a wireless Internet transmission technique, and a time difference certification key creating method. CONSTITUTION: An operating system(14) manages a system for performing an interactive working smoothly by generalizing all hardwares and softwares of a client system(10). An interface(16) is provided for controlling a hardware in the operating system(14) and connected to a connection unit(18) performing a smoothly connection of each input unit(17), an output unit(19), and the Internet, and charges a communication with the operating system(14). A WWW(world wide web) server(27) is provided for transmitting contents to be studied by a learner. A mail server(28) is provided for a communication between a managing teacher and a learner using an E-mail. A network server(26) is provided for an Internet service not being provided from the WWW server(27) and the mail server(28). Each server provides a service by an education managing control unit(30). The education managing control unit(30) comprises a CGI(common gateway interface) or an ASP(active sever page) and accesses to a database(29) by being connected to a DB managing unit(25) and provides information necessary to each server.
Patent KR-20010112689-A (KR)
Inventor: CHOI YEONG MIN
IPC: G06F15/16
Filed: 2000-06-10
Abstract: A polysulfone-base hemocathartic membrane which is improved in hemocompatibility, reduced in the bleeding of polyvinylpyrrolidone to the inner surface of the hollow-fiber membrane, and improved in separation characteristics; and processes for the production thereof. Constitution: a polysulfone-base hollow-fiber hemocathartic membrane having a selective separation layer present on the inner surface side of the hollow-fiber membrane and containing polyvinylpyrrolidone, wherein the polyvinylpyrrolidone content is 1 to 10 wt.%, 5 to 50 % of the polyvinylpyrrolidone is soluble in water, and the concentration of polyvinylpyrrolidone at the surface of the hollow-fiber membrane lies in the range of 30 to 45 %. A process for the production of a polysulfone- base hollow-fiber hemocathartic membrane, which comprises ejecting a solution containing a polysulfone polymer and polyvinylpyrrolidone and having a viscosity of 1500 to 6000 mPa. s at a rate of ejection of 90 m/min or below and drawing the resulting filament at a draft ratio of 1.1 to 1.9. Another process for the production of a polysulfone-base hollow- fiber hemocathartic membrane, which comprises producing a hollow-fiber membrane by spinning from a solution containing a polysulfone polymer and polyvinylpyrrolidone, and insolubilizing part of the polyvinylpyrrolidone, preceded by, if necessary, the extractive removal of the polyvinylpyrrolidone from the hollow-fiber membrane by washing with a solvent.