baber/WOPTO huggingface dataset:
Patent KR-20020052649-A (KR)
Title: Apparatus and method for measuring three demensional image
Inventor: KANG CHEOL GWON
IPC: G06T1/00
Filed: 2000-12-26
Abstract: PURPOSE: A device and a method for measuring a three-dimensional image is provided to use a pattern film, a photo sensor, a motor and a limit switch when measuring the three-dimensional image, so as to obtain the image having a clean pattern and acquire data having relatively low errors. CONSTITUTION: A projection unit(12) projects a pattern to a measured object. A pattern film(21) of which one end is guided is located on the front of the projection unit. A photo sensor(33) located on an upper part of the front of the projection unit senses a transfer position of the pattern film. In the pattern film, a photo sensor responding cutoff unit for cutting off the response of the photo sensor and a photo sensor responding unit for responding to the photo sensor are arranged at a predetermined distance. The pattern film is coupled to an upper part of a timing belt. A motor(36) transfers the pattern film right and left against the projection unit, to transmit the light source irradiated in the projection unit. And limit switches(37) are located in the right and left of the projection unit at a predetermined distance to suspend the transfer of the pattern film, after confirming that the transfer is performed to an end part of the pattern film by an operation of the motor.
Patent KR-20020054537-A (KR)
Title: Conductive polymer cathode ray tube black coating layer and method for producing thereof
Inventor: JUNG MIN GYO
IPC: C09D5/24
Filed: 2000-12-28
Abstract: PURPOSE: Provided are a black colored CRT coating layer of conductive polymer, which can improve low reflectivity and contrast of low reflective coating composition and block an electromagnetic wave, and a method for forming the same. CONSTITUTION: The coating layer consists of the first layer formed by using the first composition comprising PEDT(poly(3,4-dioxyethylene)-thiophene), high refractive inorganic sol, C1-C3 alcohol solvent, amide based solvent, water-soluble or alcohol-soluble resin binder, and sulfonic acid monomer dopant, and the second layer formed by using the second composition comprising PEDT, silica sol or alkyl silica sol, C1-C3 alcohol solvent, amide based solvent, and sulfonic acid monomer dopant. Either of the first or the second composition further comprises water dispersion color pigment, and water-soluble or alcohol-soluble color pigment, so as to form the coating layer.
Patent KR-20020058343-A (KR)
Inventor: KIM JEONG GEUN
IPC: H01L21/336
Filed: 2000-12-29
Abstract: PURPOSE: A method for forming a titanium silicide gate of a semiconductor device is provided to prevent a void and a crack due to a tension stress by buffering the tension stress due to transition of a titanium silicide. CONSTITUTION: A gate electrode pattern is formed on a gate oxide layer formed on a semiconductor substrate by using a polysilicon layer(102). An interlayer dielectric is formed on a whole surface of the above structure. A contact for exposing the polysilicon layer(102) is formed by removing selectively the interlayer dielectric. A titanium silicide is buried into the inside of the contact. A titanium nitride layer(104) is deposited between a polysilicon layer(102) and a titanium silicide layer(106) in order to buffer a stress and prevent a diffusion. A titanium silicide gate(108) is fabricated on the titanium silicide layer(106).
Patent KR-20010022602-A (KR)
IPC: C22C38/00
Filed: 1998-07-30
Abstract: A precipitation hardenable, martensitic stainless steel alloy is disclosed consisting essentially of, in weight percent, about - C 0.03 max - Mn 1.0 max - Si 0.75 max - P 0.040 max - S 0.020 max - Cr 10-13 - Ni 10.5-11.6 - Ti 1.5-1.8 - Mo 0.25-1.5 - Cu 0.95 max - Al 0.25 max - Nb 0.3 max - B 0.010 max - N 0.030 max - Ce 0.001-0.025 -  the balance essentially iron. The disclosed alloy provides a unique combination of stress-corrosion cracking resistance, strength, and notch toughness even when used to form large cross-section pieces. A method of making such an alloy includes adding cerium during the melting process in a amount sufficient to yield an effective amount of cerium in the alloy product.
Patent KR-20010023040-A (KR)
IPC: B01F23/57
Filed: 1998-08-19
Abstract: A method and apparatus for mixing liquids or liquids (9) with particles (8) without the aeration of the liquid. The liquid and/or particles (8) opposed in a vessel (2) having an upper end (4) and a lower end (5) and a containing wall (3) extending between the upper and lower ends. A mechanical rotating means (6) disposed adjacent the upper end (4) and submerged in the liquid (9) is used to induce a rotational flow directed radially outward from a central region of the vessel towards the containing wall (3) to establish a swirling flow. The flow is characterised by an outer annular region (11) of moderate rotational flow adjacent the containing wall (3) moving from the upper end (4) toward the lower end (5), an inward flow adjacent the lower end of the vessel (2) and an inner core (12) of rotational flow about the central region of the vessel (2). The inner core flow (12) moves from the lower end (5) toward the upper end (4) and extends substantially from adjacent the lower end (5) of the vessel to the mechanical rotating means (6).
Patent KR-20010033027-A (KR)
IPC: H04B7/26
Filed: 1998-11-12
Abstract: 호스트부(RBU-12)와 다수의 사용자부(SU-14)를 가진 동기식 코드 분할 다중 접속(S-CDMA) 라디오 주파수 통신 시스템을 작동하는 방법이다. 상기 방법은 3개의 데이터로 구성된 수퍼프레임을 정의하는 단계, 사용자(SU-14)의 수신기 타이밍과 전송기 타이밍을 호스트(RBU-12)로부터 수신된 타이밍 보정 변수에 기초한 수퍼프레임 경계와 정렬하는 단계를 포함한다. 시간적으로 프레임 #1의 동기필드 바로 전의 지점에 해당하는 수퍼프레임 경계는 (D 1 = d 1 + d 2 + d 3 )의 시간 지연을 효과적으로 발생시킨 후 SU-14의 수신기(Rx-40)에 도달한다. 전송된 데이터프레임을 수퍼프레임 경계와 정렬하는 단계 동안, RBU-12와 SU-14는 비동기 사이드채널을 통해 서로 통신한다. 정렬과정이 끝나면 통신을 동기 통신채널로 교환한다.
Patent KR-20010033701-A (KR)
IPC: C22B9/16
Filed: 1999-10-27
Abstract: 불순물을 포함하는 갈륨 원료로부터 불순물을 분리하는 방법에 있어서, 용기에 수용한 액체 상태의 갈륨 원료를 교반하면서 해당 용기의 내벽면으로부터 용기 중앙 방향으로 통 형상의 응고 계면이 점차 직경 축소하도록 응고를 진행시켜, 용기 내 원료 모두가 응고하기 전에 용기 중앙부에 존재하는 액상을 응고상으로부터 분리한다.  또, 액상을 분리한 응고상을 갈륨 원료로서 상기 방법을 필요 회수 반복한다.  응고층으로부터 분리한 불순물 농축 Ga 중의 불순물 농도를 분석함으로써, 화합물 반도체 작성용에 적합한 금속 Ga가 얻어진다.
Patent KR-20010033945-A (KR)
IPC: H04W68/00
Filed: 1999-01-27
Abstract: IP 네트워크를 통해 음성 호를 설정하는 방법이 기술되어 있다. 상기 방법은 우선적으로 전화선에 연결된 착신 장치에 대한 IP 음성 호를 개시한다. 다음으로, 상기 방법은 착신 장치가 IP 네트워크에 이미 연결되어 있는지를 결정한다. 상기 결정 단계에 기초하여, 만약 착신 장치가 IP 네트워크에 아직 연결되어 있지 않다면, 상기 방법은 IP 음성 호가 팬딩(pending)되고 있다는 것을 착신 장치에 경보를 발하기 위해서, 전화선을 통해 착신 장치에 대한 관련 전화 신호로 전화 호를 개시할 것이다.
Patent KR-20010040989-A (KR)
Title: 헤테로 방향족 알데히드류의 제조 방법
IPC: C07D239/26
Filed: 1999-12-13
Abstract: 본 발명은 촉매의 존재 하에 알킬 치환 헤테로 방향족 화합물을 분자상 산소와 기상 접촉 반응시켜 헤테로 방향족 알데히드류를 선택율이 양호하게 제조하는 것을 목적으로 하고, 촉매로서 반응기 중에 촉매층으로 존재하는 바나듐, 인 알루미늄 및 규소를 함유하는 산화물을 그 일부 또는 전부를 반응에 불활성인 고체로 희석하여 사용한다.
Patent KR-20010041789-A (KR)
Title: 우발 사고 감지기의 에러 제어 기능을 구비한 차량의탑승자 보호 시스템 및 이 시스템의 트리거링을 제어하는방법
IPC: G01P21/00
Filed: 1999-03-03
Abstract: 본 발명에 따라 차량의 탑승자 보호 시스템의 우발 사고 감지기(1)는 내부 에러 제어를 수행하며, 에러 감지의 경우 제어 장치(4)로 송신되는 영구적인 상태 신호를 발생한다.  제어 장치가 상태 신호를 수신할 때 제어 장치(4)는 전개 유용성을 차단하며 알람 신호를 발생시킨다.  우발 사고의 경우 상태 신호는 차량의 탑승자 보호 시스템의 전개 전에 한번 더 검색한다.  우발 사고 감지기(1)가 임의의 에러 신호를 보내지 않을 때 전개가 트리거링되며 우발 사고 감지기가 임의의 에러 신호를 보낼 때 전개가 차단된다.  이것은 차량의 탑승자 보호 시스템의 바람직하지 않은 전개를 방지한다.
Patent KR-20010052901-A (KR)
Title: 디스크 드라이브용 플렉스 지지 및 밀폐 장치
IPC: G11B25/04
Filed: 1999-06-15
Abstract: 디스크 장치(100)의 인쇄 회로 기판(240)의 판독 회로와 판독/기록 헤드(132) 사이에 신호 통로가 형성되는 플렉스 회로 지지 및 밀폐 장치(148)에 관한 것으로, 신호 통로는 전체 길이를 통하여 거의 균일한 커패시턴스 및 인덕턴스를 가진다.  플렉스 회로 지지 및 밀폐 장치는 컨덕터부(154)를 구비한 플렉스 회로(150), 강성 유전체 지지 브래킷(156), 및 압축성, 유전체 개스킷 밀폐부재(174)를 포함하며, 베이스 데크(104)의 커넥터 통공(162)을 통하여 연장된다.  지지 브래킷은 베이스부(158)와 베이스부로부터 양방향으로 수직하게 연장되는 커넥터부(160)를 가진다.  개스킷 밀폐부재는 상기 베이스 데크와 상기 지지 브래킷 사이에 고정된다.  커넥터부는 플렉스 회로의 컨덕터부를 지지하며 상기 커넥터 통공을 통하여 연장된다.  지지 브래킷 및 부착된 플렉스 회로는 상기 베이스 데크에 고정된다.
Patent KR-20010053038-A (KR)
Title: 알파-디-키실로스로부터 유도된 신규 화합물과 그제조방법 및 치료적 용도
IPC: A61K31/7034
Filed: 1999-06-11
Abstract: 본 발명은 신규 공업제품으로서, 구조식 Ⅰ의 α-D-키실로스 화합물에 관한 것이다. 
     
       
     
     여기서, X 및 Y는 서로 독립적으로, 산소원자 또는 황원자를 나타내며, 
     R 1 은 CN, CF 3 또는 SO 2 CH 3 기를 나타내며, 및 
     R은 수소원자 또는 2 ~ 5 개의 탄소원자를 함유하는 지방족 아실기를 나타낸다. 
     본 발명은 또한 상기 구조식 Ⅰ의 화합물의 제조방법 및 치료제로서의 용도에 관한 것이다.
Patent KR-20020057539-A (KR)
Title: Method for measuring reticle level of stepper
Inventor: HUH HUN
IPC: G03F1/42
Filed: 2001-01-05
Abstract: PURPOSE: A method for measuring the level of a reticle of semiconductor exposure equipment is provided to precisely level a vertical component in mounting the reticle in the exposure equipment having a miniaturizing exposure technology which requires a design rule of high resolution. CONSTITUTION: The reticle having a plurality of grating patterns formed in a main cell region and a local region in the outside of the main cell region are loaded to a stage of the exposure equipment. Light is radiated to the grating pattern formed in the local regions of the reticle to measure an aerial image formed by transmitted light. The measured value is converted into an electrical signal. The intensity of electrical signals in the respective local regions are compared. If a difference of the intensity exists, the level of the reticle is offset.
Patent KR-20020060332-A (KR)
Title: Perpendicular magnetic thin film for ultrahigh density recording
Inventor: HWANG MIN SIK
IPC: G11B5/64
Filed: 2001-01-10
Abstract: PURPOSE: A perpendicular recording thin film for very high density recording is provided to use a perpendicular magnetic recording medium having a perpendicular recording magnetic layer, in which a nucleation field exists in a second quadrant of a magnetization curve, so as to have excellent thermal stability with the increased crystal magnetic anisotropic energy and have a low noise characteristic even at a high density. CONSTITUTION: A magnetic recording medium accumulates an underlayer therein for inducing perpendicular alignment of a perpendicular magnetic recording layer, between a substrate and the perpendicular magnetic recording layer. The thickness of the perpendicular magnetic recording layer is adjusted to from 5nm to 40nm, to generate a negative nucleation field. The perpendicular magnetic recording layer is composed of an alloy of CoCoPt family. A Pt content of the perpendicular magnetic recording layer is 8-20 at%. A Cr content of the perpendicular magnetic recording layer is 12-20 at%. The perpendicular magnetic recording layer includes Ta, Nb or Ta+Nb of under 4 at%, as a fourth or fifth content. And the underlayer is composed of an ally of Ti family.
Patent KR-20020061929-A (KR)
Inventor: YANG GI WAH
IPC: F02B53/00
Filed: 2001-01-19
Abstract: PURPOSE: Exhaust loss and cooling loss are reduced to improve heating efficiency of engine. CONSTITUTION: A triangular rotor(12) rotates around a main shaft(11). One rotation of the main shaft produce a compression air two times, An air compressor(10) has an air intake port(14) and a compression air exhaust port(15), and a back flow preventing valve(16). A cooling passage are formed in a pair of male and female rotor of helical screw type. A power generator makes a sealed space as the rotor rotates. The compression air is supplied to the power generator, and cools rotors.
Patent KR-20020065248-A (KR)
Title: Preprocessing of Human Iris Verification
Inventor: KIM EUNG JU
IPC: G06K9/00
Filed: 2001-02-06
Abstract: PURPOSE: A method for normalizing an image in non-contact iris recognition is provided to extract the optimal image of the iris by using an infrared lamp and to normalize the image of the iris in a specific size by converting the pattern of the iris into polar coordinates. CONSTITUTION: The method comprises steps of acquiring the image of the iris by using an image acquisition device and an infrared lamp, detecting the internal and external boundary of the iris of the image, detecting the center of the internal and external parts of the iris, detecting the iris pattern of a specific portion, converting the detected iris pattern into polar coordinates, normalizing the iris pattern as an image having a regular size, and comparing the pixels of the iris image. For detecting the internal and external boundary of the iris image, the boundary of the pupil and the iris is detected through boundary detective filtering. The center of the pupil from the internal boundary of the iris area is obtained. The external boundary of the iris area is detected by using the difference of the pixel values between the internal area and the external area.
Patent KR-20020067105-A (KR)
Title: Modified interferon-alpha 2a and 2b, and conjugate with peg derivatives thereof
Inventor: HYUN CHANG MIN
IPC: C07K14/56
Filed: 2001-02-15
Abstract: PURPOSE: Provided are modified interferon-alpha 2a and 2b, and a conjugate of PEG derivatives therewith, to reduce physiological activity of interferon and increase sustaining time thereof in a living body. CONSTITUTION: The modified interferon-alpha 2a or 2b is prepared by substituting cysteine for 106 threonine or 161 leucine in wild type of human interferon-alpha 2a or 2b. PEG derivative specifically bonds to a cysteine residue to prepare the conjugate of PEG derivative with the above modified interferon alpha 2a or alpha 2b.
Patent KR-20020071111-A (KR)
Title: Method for multimedia broadcasting service using traffic channel in wireless communication system
Inventor: JUNG EON HWA
IPC: H04B7/24
Filed: 2001-03-03
Abstract: PURPOSE: An MBS(Multimedia Broadcasting Service) method using a traffic channel in a wireless communication system is provided simultaneously use a high-speed broadcasting dedicated channel of a traffic channel and offer a high-speed multimedia service to a plurality of subscribers. CONSTITUTION: If an IP(Information Provider)(18) transmits corresponding multimedia information to an MBS server(19)(601), the MBS server(19) transmits corresponding multimedia information to a PDSN(Packet Data Service Node) of an IP(Internet Protocol) network(602). The PDSN sets a UDP(User Datagram Protocol) and an IP and transmits corresponding multimedia information to a BTS/BSC(Base Transceiver Station/Base Station Controller)(12)(603). If corresponding multimedia information is correctly received, the BTS(12) transmits a response to the PDSN, the MBS server(19), and the IP(18)(605-607). The BTS(12) unidirectionally transmits corresponding multimedia information to an MS(Mobile Station)(11) through an F-FCH(Forward Fundamental CHannel) and an F-SCH(Forward Supplemental CHannel)(604).
Patent KR-20010089186-A (KR)
Title: Computer network comprising a plurality of gateways to at least one telephone network
Inventor: N GUYEN VAN-DUONG ERIC
IPC: H04M3/00
Filed: 2001-03-07
Abstract: PURPOSE: Computer network with several gateways including one to a telephone network is provided to reduce expenses for telephone communication by using a computer network even for radio telephone. CONSTITUTION: Gateways(1a to 1d, 2a to 2d, 3 and 4) of the computer network convert signals to computer data. Each gateway can be regionally used for a given geographic zone. Each gateway is provided with a means for connecting to telephone networks(10,20,30,40) by radio. A server(6) manages a table(61) which has an indication, which shows which gateway can be used in accordance with the geographic position of individual terminals in radio telephone networks(10,20,30,40), for each terminal and indicates the position of the terminal.
Patent KR-20020073674-A (KR)
Title: Selective communication method for mobile communication device
Inventor: CHUN HO CHEOL
IPC: H04M1/663
Filed: 2001-03-15
Abstract: PURPOSE: A selective call method for a mobile communication terminal is provided to maximally protect the right of a user by performing a voice communication without transmitting an image when a telephone for which the user does not wish connects and preventing the information drain of the user. CONSTITUTION: If a telephone is terminated(S21), a yellow LED(Light Emitting Diode) is turned on for visually informing that the telephone is terminated(S22) and a designated bell sound is rung for aurally informing that the telephone is terminated(S23). A user determines whether performing a telephone conversation with reference to the bell sound or a caller ID displayed on an LCD of a terminal(S24). In case that the user wishes to perform the telephone conversation, the user determines whether performing an image telephone conversation or a voice telephone conversation(S26). In case that the user is in situation in which it is impossible to transmit image information of the user or the user does not want to show image information of the user, after pausing for a camera function, the user transmits an embedded character or random image(S28). In case that the user wants to transmit the voice and image, the user pushes a 'send key' or a random key for performing the voice and image telephone conversation(S27).
Patent KR-20020075645-A (KR)
Title: focus adjusting system of the passive form and method thereof
Inventor: KIM SEONG GON
IPC: G03B13/36
Filed: 2001-03-27
Abstract: PURPOSE: An automatic focusing apparatus and method is provided to achieve improved reliability for camera by performing an accurate focusing even when the objects repeatedly appear at a constant time interval. CONSTITUTION: An automatic focusing apparatus comprises a distance measurement light receiving unit(10) including a first light receiving section and a second light receiving section each of which is constituted by a plurality of light receiving sensors for outputting electrical signals corresponding to the light emitted from an object; a control unit(30) including a distance calculation section(31) for obtaining the distance to the object, by obtaining distance measurement data by processing value of the signal output from one light receiving sensor in accordance with the increase or decrease of the signal output from the light receiving sensor of the distance measurement light receiving unit, and calculating contrast difference of the object by using the obtained distance measurement data, and a driving amount calculation section(33) for calculating the volume of focusing in accordance with the distance to the object; and a focusing unit for performing focusing by moving the lens in accordance with the volume of focusing calculated by the driving amount calculation section.
Patent KR-20010090585-A (KR)
Title: One piece differential bearing adjuster lock and fastener
Inventor: ENDRESZL JOSEPH MICHAEL
IPC: F16H57/022
Filed: 2001-03-27
Abstract: PURPOSE: A differential bearing adjuster lock and fastener is provided to reduce the number of components required to couple the adjustment nut to the bearing cap and assembly cost, by eliminating the need for starting a threaded fastener and subsequently applying torque to the fastener with a calibrated tool. CONSTITUTION: A drive axle assembly for a motor vehicle includes an axle housing, a differential bearing(28), a differential assembly(20), an adjustment nut(32) and an adjuster lock(10). The differential assembly is rotatably supported within the axle housing by the differential bearing. The differential bearing is coupled to the axle housing via a bearing cap(30) having an aperture formed therein. The adjustment nut has at least one retention aperture and the adjustment nut is engaged with the differential bearing such that rotation of the adjustment nut axially displaces the differential bearing. The adjuster lock includes a first portion and a second portion. The first portion has a barb disposed in the bearing cap aperture. The second portion has a first lock pin disposed in the retention aperture thereby restricting the adjustment nut from rotating relative to the bearing cap.
Patent KR-20010095105-A (KR)
Title: Coating apparatus and mixing apparatus
Inventor: HARA HIROYUKI
IPC: H01L21/00
Filed: 2001-03-29
Abstract: PURPOSE: An apparatus for coating a layer is provided to sufficiently mix treatment liquid and a solvent supplied to a substrate, by installing the inner diameter of an interflow pipe smaller than that of another supply pipe so that the treatment liquid and the solvent are effectively mixed in the interflow pipe. CONSTITUTION: A supporting member supports a substrate. A nozzle supplies mixed liquid of the treatment liquid and the solver to the surface of the substrate. The first pipe supplied the mixed liquid to the nozzle, having the first diameter. The second pipe supplies the treatment liquid to the first pipe, having the second diameter. The third pipe supplies the solvent to the first pipe, having the third diameter. The fourth pipe supplied mixed liquid of the treatment liquid and the solvent to the first pipe, having the fourth diameter smaller than the first, second or third diameter and coupled to the first, second and third pipes.
Patent KR-20020076603-A (KR)
Title: Reciprocating type motor
Inventor: JUNG WON HYEON
IPC: H02K33/16
Filed: 2001-03-29
Abstract: PURPOSE: A reciprocating motor is provided to reduce manufacturing cost by reducing the number of permanent magnets constituting a mover of the motor, while improving performance of motor by reducing leakage of flux. CONSTITUTION: A reciprocating motor comprises an outer core; an inner core inserted into the outer core; a coil inserted into the outer core or the outer core; a mover having permanent magnets and which is interposed between the outer core and the inner core; an opening(510) formed to allow the coil to be disposed within the inner or outer core where the coil is inserted; a first stepped portion(520) extended from the inner surface of the opening in such a manner that the inner intervals of the opening becomes narrow as it goes toward an entrance of the opening; and a second stepped portion(530) extended from the first stepped portion so as to form the entrance of the opening.
Patent KR-20010095330-A (KR)
Inventor: BROWNLOW MICHAEL JAMES
IPC: H03K5/15
Filed: 2001-04-04
Abstract: PURPOSE: A static clock pulse generator and a display are provided to obtain the static clock pulse generator including plural stages, each of which includes a D-type flip-flop and a gating circuit, wherein the flip-flop supplies an output signal of the stage to be used also as a gating signal for the gating circuit of the post stage. CONSTITUTION: A static clock pulse generator is formed by two card rows(1,2). The card row(1) contains a D type latch(3) and a gate circuit(4). The latch(3) has a direct type output(Q) and a reversed type output(Q). The latch(4) has an asynchronous type reset-input R which receives a reset signal from the latter part. The gating circuit(4) has the complementary-type clocked into CK connected to the master-clock input through the clock line common to all card rows, and CK. The clocked into CK of the gating circuit(4) of the card row(1) is connected to the clock line CK. The gating circuit(4) has complementary-type gating inputs G and G which receive a gating signal from the preceding paragraph. The card row(1) is activated by the direct type clock pulse CK, and the card row(2) is a reversed type clock pulse.
Patent KR-20020080040-A (KR)
Title: An using method of the nitrous oxide gases for conveyance of the viewer fishes
Inventor: KIM JIN KYUNG
IPC: A01K63/02
Filed: 2001-04-10
Abstract: PURPOSE: Provided is a method for transporting aquarium fish by anesthesia using nitrous oxide having excellent evaporation ability and little residual property in a living body, therefore, which reduces the stress of the aquarium fish caused by the transport. CONSTITUTION: The nitrous oxide is injected into water through a nitrous oxide gas spouting tip(1), wherein the nitrous oxide is injected in excess for the anesthesia at the beginning because the nitrous oxide has litter residual effect in a living body and evaporates immediately and then a small amount of the nitrous oxide is injected continuously after the anesthesia.