baber/WOPTO huggingface dataset:
Patent KR-20000076055-A (KR)
Title: Polymerizable unsaturated compounds, curable resin compositions containing the same, and products of curing thereof
IPC: C08L75/14
Filed: 1997-03-07
Abstract: An unsaturated polyester (i) having a weight-average molecular weight (Mw) of 1,000-100,000 and at least two carbon-carbon unsaturated bonds in the molecule thereof obtained by esterifying an unsaturated carboxylic acid (b) with a polyester-polyol (a) obtained by subjecting a polybasic carboxylic acid containing polymerized fatty acid and/or polymerize fatty acid ester to polycondensation with a polyhydric alcohol; and an unsaturated (poly)urethane having Mw of 1,000-100,000 and at least two carbon-carbon unsaturated bonds in molecule obtained by reacting said polyester-polyol (a), polyisocyanate (d) and compound (e) having active hydrogen and polymerizable carbon-carbon unsaturated bond. Said unsaturated polyester and unsaturated (poly)urethane exhibit excellent adhesive property, heat resistance, water resistance and flexibility after being cured.
Patent KR-20010006114-A (KR)
IPC: C07G1/00
Filed: 1998-03-18
Abstract: The separation of black liquor, containing lignin, from tall oil is enhanced by the addition of a separation aid. The separation aid is an alkylphenol-formaldehyde resin alkoxylate, a poly (proplyene oxide) ethoxylate, an alkanol amine condensate, or combination thereof.
Patent KR-20010006589-A (KR)
Inventor: TATSUZAKI HIDE
IPC: A61K36/42
Filed: 2000-01-26
Abstract: PURPOSE: To obtain a therapeutic agent for dysuria improved in therapeutic effect by formulating a well-known therapeutic agent for dysuria containing dried extract of pumpkin seed as an active ingredient with other ingredient. CONSTITUTION: This therapeutic agent contains dried extract of pumpkin seed and isoflavone as active ingredients and the formulation ratio by weight of the dried extract of pumpkin and isoflavone is (99:1) to (80:20).
Patent KR-20010076889-A (KR)
Title: Low pressure type rotary compressor
Inventor: AHN BYEONG HA
IPC: F04B39/00
Filed: 2000-01-28
Abstract: PURPOSE: A low pressure rotary compressor is provided to achieve an improved motor efficiency and compressor performance by increasing cooling efficiency of the driving motor, while reducing the size of the compressor. CONSTITUTION: A compressor includes a casing(11) to be filled with oil and which has an interior divided into a suction pressure section(Ss) communicated with a suction pipe(SP) and a discharge pressure section(Sd) communicated with a discharge pipe(DP). The suction pressure section includes a driving motor having a stator(12) and a rotor(13). A driving shaft(14) is press fit into the center of the rotor, and a compressor unit is installed at the upper portion of the driving shaft. The compressor unit includes a cylinder(15) having a circular inner periphery and which is fixed to the inner periphery of the casing so as to divide the interior of the casing into the suction pressure section and the discharge pressure section; an upper bearing(16A) and a lower bearing(16B) tightly contacting both side surfaces of the cylinder, and through which the driving shaft penetrates; a rolling piston(17) eccentrically rotating within the cylinder and a vane contacting the outer periphery of the rolling piston and which divides the cylinder into a suction area and a compression area during the turning motion of the rolling piston. The cylinder has a suction port(15a) communicated to the suction pressure section of the casing, and a discharge port(16a) communicated to the discharge pressure section. A discharge valve assembly(18) is mounted onto the discharge port.
Patent KR-20010077387-A (KR)
Title: OSD display Method of composite TV and DVD player
Inventor: SEO MYEONG SU
IPC: H04N5/445
Filed: 2000-02-02
Abstract: PURPOSE: An OSD display method of a DVD player combined TV device is provided to simplify the process of a TV function processing part by processing an OSD signal through a DVD processing part. CONSTITUTION: A main processing function control part of a DVD player combined TV device confirms whether a control signal inputted from an outside is related to an OSD or not(s303). If the control signal is not related to the OSD, the pertinent control signal for performance of a TV or a DVD player is processed(S317). If the control signal is related to the OSD, it is confirmed whether the control signal related to the OSD is a control signal related to the OSD for a main function or not(s305). In case that the control signal related to the OSD is the control signal related to the OSD for the main function, a main control part processes an OSD signal process(s307). On the other hand, in case that the control signal related to the OSD is the control signal related to the OSD for a sub function, an OSD process order is transmitted to a sub control part(S309), and the sub control part processes the pertinent OSD signal(S311). After this, a screen processing part displays a processing result of the main control part or the sub control part(s313,s315).
Patent KR-20010077765-A (KR)
Title: Prevention apparatus for sudden start of vehicle
Inventor: SEO SEONG GU
IPC: B60K28/10
Filed: 2000-02-08
Abstract: PURPOSE: A sudden acceleration preventive device in a vehicle is provided to prevent sudden start of a vehicle by braking automatically in changing speed at a stop of the vehicle. CONSTITUTION: A sudden acceleration preventive system is composed of a brake operation detecting unit(50) detecting operation of a brake pedal(51) and outputting a signal; a vehicle speed detecting unit(10) outputting a signal to detect vehicle stop; a control unit(20) outputting signals to keep the maximum braking force and to permit change of speed; an electronic brake apparatus(40) receiving the brake signal from the control unit, and applying braking force to a wheel cylinder(42); and an automatic transmission control apparatus(30) receiving the signal from the control unit and releasing the lock. The control unit outputs signals to the electronic brake apparatus and the automatic transmission control apparatus in detecting operation of the brake pedal. The sudden acceleration is prevented with changing speed at the maximum braking force.
Patent KR-20010083505-A (KR)
Title: Manufacturing method for graphite sheet
Inventor: KWON O YUN
IPC: C01B31/04
Filed: 2000-02-15
Abstract: PURPOSE: A processing method of graphite sheets with a thickness is provided, which is characterized by multi-layering graphite sheets pressed with roller. The method shortens the process, increases strength of sheet and saves processing cost. CONSTITUTION: The graphite sheet is produced by the following steps: (i) spreading foamed graphite powder coated with a binder on a mold and pressing with a roller for a first graphite sheet; (ii) spreading the foamed graphite powder on the upper part of the first sheet and rolling; (iii) repeating the step(i), (ii) until aimed thickness is formed.
Patent KR-20000049403-A (KR)
Inventor: JUN UN TAK
IPC: B02C18/14
Filed: 2000-02-16
Abstract: PURPOSE: A PET bottle crusher is provided which crushes and cuts PET bottle in a certain size for easy recycling so that it minimizes the loss in material and processing energy. CONSTITUTION: A PET bottle crusher contains the following components of: a rectangular base frame(100) wherein a discharge hole(206) is formed; a driving motor(200) which is fixed on the base frame; multiple rotation blades(224) which are fixed in the outer circumference face of a rotation magnetic; a compression drum(220) which is worked together with the rotation blade; a second supply drum(216) which is worked together with the compression drum and forms multiple saws(217) in the outer circumference face; a first supply drum(210) which is worked together with the second supply drum and forms multiple hooks(211) in the outer circumference face; and a recycling conveyer is connected to a discharging hopper(204) to withdraw large piece of PET bottle remained inside the body and resupply pieces.
Patent KR-20010083586-A (KR)
Title: Kimchi and process for preparation thereof using heat-treated cabbage
Inventor: KIM SOON DONG
IPC: A23B7/10
Filed: 2000-02-17
Abstract: PURPOSE: A method for preparing a kind of kimchi by using white cabbage heated with salt water at 40deg.C is provided to serve cabbage kimchi having high palatability, low acidity and improved flavor with little damages on the surface. CONSTITUTION: The method is characterized the following steps of: (i) soaking pieces of white cabbage in 10% salt water of which temperature is adjusted to 40deg.C and leaving the cabbage at room temperature of 20deg.C for 24hr; (ii) washing the cabbage salted down with flowing water three times and dewatering the cabbage in a low temperature room of 4deg.C for 2hr; and (iii) dressing the prepared cabbage with 1.8g of smashed garlic, 0.4g of smashed ginger, 4.5g of powdered red pepper and 4.5g of salted anchovies and aging the kimchi in a bottle at 10deg.C.
Patent KR-20000076723-A (KR)
IPC: A01K89/0155
Filed: 2000-02-24
Abstract: A centrifugal braking mechanism is a device for braking a spool (12) that is rotatably supported in a reel body (1). The braking mechanism uses centrifugal forces in order to produce braking force against rotation of the spool (12). The braking mechanism (23) includes a plurality of brake members (53), a brake housing (52) having a cylindrically shaped brake liner, and an adjusting mechanism. Each of the plurality of brake members (53) is configured to move in a radially outward direction relative to the spool in response to rotation of the spool (12). The brake housing (52) and brake liner (57) are moveable in an axial direction relative to the spool (12) and brake members (53) such that any selected number of the brake members (53) may contact the brake liner to generate the braking force. The adjusting mechanism is used to selectively move the brake housing (52) and brake liner (57) into any of a plurality of axial positions thereby determining the number of brake members (53) that are contactable with the brake liner (57) in response to centrifugal force. The level of braking force desired is determined by the number of brake members (53) that may contact the brake liner (57). <IMAGE>
Patent KR-20010087967-A (KR)
Title: The power on/off device of a computer and surroundings equipment
Inventor: IN HO JIN
IPC: G06F1/26
Filed: 2000-03-09
Abstract: PURPOSE: A power on/off device of the computer and peripheral is provided to reduce the waste of power outstandingly without the additional operation by blocking the power of peripherals, such as a printer, monitor, speaker, and so on, with one touch. CONSTITUTION: When the AC(Alternating Current) power is impressed according to the switch handling of the computer body, a power switch(10) has the AC power flow into the monitor, speaker, and printer. A relay(20), which is mounted between the power switch and the computer power, stays in the power on when the power is impressed to a relay coil, while staying in the power off when the window exit is run. A power sensor(30) perceives the power-on signal caused by the relay interrupt. A comparator(40) interrupts the relay by checking the current intensity when the system exit is impressed to a chip-set of a computer main-board.
Patent KR-20010100197-A (KR)
Inventor: KIM NAM DU
Filed: 2000-03-15
Abstract: 본 발명은 하기 화학식 2의 에리스로마이신 A 9- O -트로필옥심 유도체를 이용하여 마크로라이드 항생제인 클라리스로마이신을 고수율로 간편하게 제조하는 개선된 방법에 관한 것이다. 
     
       
         
       
     
     상기 식에서, 
     R 1 은 수소 또는 메틸기이고, R 2 는 수소 또는 트리메틸실릴기이며, 단, R 1 이 메틸기인 경우 R 2 는 트리메틸실릴기이다.
Patent KR-20000076944-A (KR)
Title: 회로칩 커넥터 및 회로칩의 연결 방법
IPC: H01R4/04
Filed: 2000-03-24
Abstract: 본 발명은 집적회로 칩과 안테나와 같은 박막 회로를 구비한 신축성 라디오 주파수(RF) 형식의 장치를 제조하기 위한 방법 및 인터포우저에 관한 것이다.  이 장치는, IC를 박막 회로에 전기적 및 기계적으로 부착하기 위하여 미리 배치된 IC를 구비하며 삽입이 용이한 인터포우저 서브 조립체를 이용하여 만들어진다.  라디오 주파수 장치의 양산 방법에는 감압식 접착제를 이용하여 물리적 및 전기적으로 안테나에 접속되는 인터포우저상의 안테나와 IC가 포함된다.
Patent KR-20010014642-A (KR)
Inventor: JONATHAN PAUL BUREJIN
IPC: G06F17/30
Filed: 2000-03-28
Abstract: PURPOSE: A method is provided to optimize and to enhance a system performance by chasing user action and a systematic information source showing a communication relation, execution the calculation of data from plural sources of different kinds and constructing the expression of importance of another communicating party concerning a prescribed user. CONSTITUTION: One or plural information sources IS103, one or plural client nodes C101 and one or plural relation analyzers RA104 are connected directly or through a wide area network WAN (102) to Internet. An information source node (103) stores information and can retrieve it when a suitable reference is presented. Thus, the client node (101) prepares a reference to be transmitted to the information source (103) by a user (101) and is connected to the Internet for receiving the result of the reference visually or through an audio means. Further. by introducing the relation analyzer (104), the speed and accuracy of the reference and retrieval tasks can be improved.
Patent KR-20010094473-A (KR)
Title: Method for manufacturing the mustard leaf radish pickles
Inventor: OH MU HWAN
IPC: A23L19/20
Filed: 2000-03-31
Abstract: PURPOSE: A process of preparing leaf-mustard pickled radish is provided by putting the leaves of a leaf mustard on radish when radish is salted and adding leaf mustard juice during aging, thereby, the titled radish colored by beta-carotin contained in a leaf mustard is produced and a peculiar unpleasant bitterness can be removed. CONSTITUTION: The process of preparing leaf-mustard pickled radish comprises the steps of: uniformly covering the upper part of radish with the leaves of a leaf mustard; pressing with heavy goods for about 3 months until the volume of radish becomes about 55%; dipping 66% by weight of salted radish in a mixture of 33% by weight of leaf mustard juice and 1% by weight of a seasoning liquid; and aging for about 3 to 7 days.
Patent KR-20010094125-A (KR)
Title: A method and system for transporting directly a goods using an internet and a mobile communication networks
Inventor: KOOG IL HO
Filed: 2000-04-04
Abstract: PURPOSE: A method and system for directly handling logistics based on the internet and a mobile communication network is provided to enable a consumer and a forwarding agent to transact directly using a global positioning system including the internet, a mobile network and a ground/aviation without delivery company. CONSTITUTION: A consumer(10) connects to a web server, and inputs a delivery requesting information. The optimum personal forwarding agents(20A¯20C) are selected according to orders based on the inputted delivery requesting information. A short message service(SMS) including the delivery requesting information and position information is transmitted to the selected corresponding forwarding agents(20A¯20C). The personal forwarding agents(20A¯20C) receive the short message service(SMS) and receive an order and perform a delivery to the consumer(10) through a communication unit.
Patent KR-20010089980-A (KR)
Title: 5'-Xanthylic acid producing microorganism
Inventor: HAN JONG GWON
IPC: C12N1/20
Filed: 2000-04-08
Abstract: PURPOSE: A microorganism SaO.4-23 (KFCC-11139) producing 5-xanthylic acid(XMP) is provided which is a mutant strain of Corynebacterium ammoniagenes (KFCC 10743) having sodium azide resistance and reinforced electron transport system, thereby having superior productivity of 5-xanthylic acid than conventional strains. CONSTITUTION: A microorganism SaO.4-23 (KFCC-11139) producing 5-xanthylic acid(XMP) is obtained by treating Corynebacterium ammoniagenes (KFCC 10743) with mutagens such as, N-methyl-N-nitro-N-nitrosoguanidine(NTG) or UV rays, to have sodium azide resistance and reinforced electron transport system. Therefore, it has improved productivity of 5-xanthylic acid. 5-xanthylic acid is an intermediate of biosynthesis of purine nucleotide and used as a source in manufacturing 5-guanylic acid.
Patent KR-20000071792-A (KR)
Title: 내연기관용 연소제어장치 및 연소제어방법
IPC: F02P5/15
Filed: 2000-04-24
Abstract: 공조장치(50)가 엔진의 워터 재킷(20) 내에서 순환하는 냉각수를 이용하여 차량 실내를 난방 한다.  엔진의 전자제어장치(80)는 엔진부하가 높을 때 균질 연소를 수행하고 엔진부하가 낮을 때 성층연소를 수행하도록 엔진을 제어한다.  그러나, 전자제어장치(80)는 공조장치(50)의 승온능력이 부족할 때에는 균질연소를 수행하도록 엔진을 제어한다.  이에 따라, 엔진의 열효율이 낮아지고 연소가스로부터 냉각수로 전달되는 열량이 증가한다.  그 결과, 공조장치(50)의 승온능력은 충분하여 진다.
Patent KR-20010007035-A (KR)
Inventor: NAKAJIMA YUJI
IPC: G06F12/08
Filed: 2000-04-29
Abstract: PURPOSE: To obtain a semiconductor storage device in which occupancy area can be suppressed small and access speed can be increased. CONSTITUTION: This semiconductor storage device is a two way set associative cache memory constituted of a DRAM in which memory cell arrays Way0 and Way1 are provided. The number of division of the memory cell arrays Way0 and Way1 is same in a row direction, but in a column direction, that of the memory cell array Way0 is more than the other. Also, memory cells in each memory cell array Way0 and Way1 are arranged so that the same addresses are positioned at the same position in the column direction.
Patent KR-20010098226-A (KR)
Inventor: PARK SEA HO
Filed: 2000-04-28
Abstract: 본 발명은 쇼핑몰서버 상에 각각의 지역단위별로 마련되어진 개별 쇼핑몰들이 인터넷 망을 통하여 접속된 사용자와 주체적으로 전자상거래를 수행할수 있도록 하는 개별 쇼핑몰 주체형 전자상거래 시스템에 관한 것이다. 
     본 발명에 따른 개별 쇼핑몰 주체형 전자상거래 시스템은 소정의 지역단위별로 구성된 지역단위 쇼핑몰과, 지역단위 쇼핑몰에 마련되어 사용자와 전자상거래를 수행하는 적어도 하나 이상의 개별쇼핑몰과, 지역단위 쇼핑몰 및 상기 개별쇼핑몰의 웹호스팅을 수행하는 쇼핑몰 서버를 구비한다. 
     이에따라, 본 발명에 따른 개별쇼핑몰 주체형 전자상거래 시스템은 개별쇼핑몰들이 물품의 배송 및 결제의 주체가 될뿐만 아니라 별도의 수수료를 쇼핑몰서버에 지불하지 않으므로 가격경쟁력을 높일수 있게된다.
Patent KR-20010103255-A (KR)
Title: 유알엘을 이용한 웹 페이지상에서 전화 연결 방법 및 이를위한 커스텀 가상콜 시스템
IPC: H04L29/08
Filed: 2000-05-09
Abstract: 본 발명은 인터넷 사용자가 월드와이드웹을 서핑하는 중에 특정 회사의 웹 사이트에서 웹 페이지에 있는 콜링 버튼만을 클릭함으로써 그 회사의 고객센터나 원하는 부서로 전화를 연결하여 상담원과 통화를 가능하게 하는 URL정보를 통한 웹 페이지상에서 전화 연결 방법 및 이를 위한 커스텀 가상 콜 시스템에 관한 것이다. 특히, 본 발명은 스킨서버를 이용하여 동일한 콜 클라이언트에서 다른 기업의 URL만 입력하여 콜 클라이언트의 디자인을 완전히 변경할 수 있고, 빌링시스템을 포함하여 다양한 결재 방식의 유료서비스와 통계를 제공할 수 있다. 이러한 본 발명의 방법은, 사용자가 웹 페이지상에서 전화를 요청하는 단계; 요청한 웹 페이지의 URL과 대응하는 전화번호 정보가 포함된 고객파일과 콜 클라이언트를 다운로드하는 단계; 콜 클라이언트가 전화번호로 접속을 요청하여 사용자와 해당 기업의 고객센터를 연결하는 단계를 포함하고, 본 발명의 시스템은 해당 웹 페이지의 URL을 전달받아 전화번호가 포함된 고객파일과 콜 클라이언트를 사용자측으로 제공하기 위한 커스텀URL서버; 사용자가 콜 클라이언트를 통해 전화접속을 요청하면 VoIP기술을 통해 기업의 고객센터로 전화연결하는 전화접속수단를 포함한다.
Patent KR-20010109561-A (KR)
Inventor: YOON DEOK YEONG
Filed: 2000-05-30
Abstract: 본 발명은 발신측 단말장치로 출력되는 호출중신호음의 광고음 변환장치 및 그 제어방법에 관한 것으로서, 발신측에서 수신측으로 전화를 걸 때 수신측 단말장치로 호출신호를 송출하고 있는 것을 알리기 위해 발신측 단말장치로 출력되는 호출중신호를 검출하여 호출중신호음을 광고음으로 변환하여 송출함으로써 광고의 효과를 높일 수 있을 뿐만 아니라 전화요금을 감면받을 수 있어 전화요금을 절약할 수 있는 이점이 있다.
Patent KR-20010113185-A (KR)
Inventor: SONG JEONG GON
IPC: A47L5/14
Filed: 2000-06-16
Abstract: 본 발명에 따르면, 진공청소기는  흡입통로와 배출통로를 가진 본체와, 이 본체의 흡입통로상에 설치되는 집진포대 및  고속의 모우터에 의해 회전하는 임펠러를 가진 흡입수단과, 상기 본체와 연결되는 것으로 흡입통로와 배출통로와 연통되는 흡입로와 배기로가 마련된 연결관과, 상기 본체에 설치되어 상기 배출통로로 배출되는 공기를 선택적으로 배기하는 배출수단을 포함한다.
Patent KR-20020001399-A (KR)
Title: Device for measuring coil in annealing pickling line
Inventor: KIM TAE GYEONG
IPC: C21D1/00
Filed: 2000-06-28
Abstract: PURPOSE: An apparatus for measuring coil size in an annealing and pickling line is provided which measures the width of a normal or abnormal coil so that the coil is automatically mounted on a payoff reel accordingly. CONSTITUTION: The apparatus for measuring coil size in an annealing and pickling line comprises a rail member(10) which is installed on the bottom of a facility of the side surface of a coil car; a base member(12) on both side surfaces of which driving wheels rolling along the rail member is installed, and which is laid so that it is moved to the side surface of the coil along the rail member(10); driving cylinders(13) for moving the base member(12); a vertical rail member(15) which is installed on the base member(12); a width measuring part which is installed at the vertical rail member(15) so as to measure a width of the coil; and an outer diameter measuring part for measuring an outer diameter of the coil, wherein a rack formed rack bar(16) is adhered to the side surface of the base member, a pinion gear(17) in gear with the rack is rotationally mounted on a bracket, and a first PLG(18) for sensing the number of rotations is installed on the rotation axis of the pinion gear.
Patent KR-20020003987-A (KR)
Inventor: EUM IN JONG
IPC: C02F11/00
Filed: 2000-06-28
Abstract: PURPOSE: An excrement treatment equipment is provided, which can eliminate nitrogen contained in excrement by injecting air into the excrement through an ejector type discharge pipe. CONSTITUTION: The equipment comprises a main body(10) of a centrifugal pump type with suction(11) at the bottom and discharge at top, the impeller being driven by motor(12). The discharge pipe(14) forms a type of an ejector in which auxiliary discharge pipe works a nozzle to flow gas from treatment equipment and air inlet(16) works as side inlet to take in air and at the end of the discharge pipe(14) a dispersing pipe(18) of inclined plate is installed to disperse excrement.
Patent KR-20000063387-A (KR)
Inventor: LEE JEONG MIN
IPC: A47G21/18
Filed: 2000-07-04
Abstract: PURPOSE: A structure of an operational part used in a drink discharging stand and a method for manufacturing the same are provided to adjust only the length of the supplementary operational part even if the length of the operational parts differ by taking the straw type supplementary operational part partially formed by press molding without extra various metal mold. CONSTITUTION: A method for manufacturing an operational includes the steps of forming a ring-shaped frame for operating(101) and a frame for fixing(103) based on a ring-shaped groove( 102) in the upper part, at least one or more discharging holes(106) based on a ring-shaped frame(104) above upward and an arbitrary length pipe part having a folded part(111) downward in the lower part, wherein the discharging holes are communicated with a discharging port(107) formed in the central part, an air inlet groove(108) is long formed in the outside of the gaps of the discharging hole from the frame for fixing to the ring-shaped groove.
Patent KR-20020005861-A (KR)
Title: Apparatus and method for measuring the wave propagation speed in a fluid-filled elastic hose
Inventor: CHO CHI YEONG
IPC: G01H5/00
Filed: 2000-07-10
Abstract: PURPOSE: A wave transfer speed measuring device in a fluid-filled elastic hose is provided to measure the exact wave transfer speed in a fluid-filled elastic hose without generating unnecessary dynamic characteristics. CONSTITUTION: A sound module(1) has an elastic hose(2) having lengthwise agreed with a vertical direction, and a watertight connector(4) assembled at the lower end. The elastic hose is filled with fluid(3). The elastic hose is manufactured with sealed structure by forming the watertight connector. The sound module keeps the vertical direction by the load of the fluid and includes a weight(5) installed on the watertight connector to keep the vertical direction more firmly. A cylinder(9) is extended to the upper end of the elastic hose of the sound module. A piston driven by an exciter(6) is installed inside the cylinder. A signal generator(7) is mounted on the exciter to generate exciting signals inputted to the exciter. Underwater sound detectors(10) are arranged regularly lengthwise in the elastic hose. Electric sound pressure signals measured from the underwater sound detectors are inputted to a signal analyzer(12) through a cable(11) to obtain a wave number to frequency spectrum. A dispersion curve is obtained from the wave number to frequency spectrum, and the inclination of the dispersion curve is calculated to decide wave transfer speed. Therefore, the wave transfer speed is measured exactly.