baber/WOPTO huggingface dataset:
Patent KR-20000018228-A (KR)
Inventor: YOOK CHANG NAE
IPC: H04L12/58
Filed: 2000-01-24
Abstract: PURPOSE: A bell sound sending method using a short message service of a portable mobile terminal is provided to cheaply construct a bell sound sending system without changing short message service of a mobile communication enterpriser. CONSTITUTION: A bell sound sending method using a short message service of a portable mobile terminal comprises the steps of controlling a short message service function of the terminal by a portable mobile terminal controller for sending a bell sound, converting bell sound data into data of a short message service type by the controller and then sending the converted data to the terminal, and controlling the controller to send bell sound data of the short message service type to the terminal.
Patent KR-20010076482-A (KR)
Title: Linear motor with electromagnetic clamper
Inventor: JUNG JAE SEONG
IPC: H02K41/02
Filed: 2000-01-26
Abstract: PURPOSE: The linear motor using electromagnetic clamper is provided to make structure be clamped on the bottom as a great force using electromagnetic force and can also drive at high frequency. CONSTITUTION: The linear motor using electromagnetic clamper comprises a wire(25) with many windings like a coil in the middle, many electromagnetic clampers(20) which are ferromagnetic to change direction of magnetic field according to flowing direction of current input from the wire(25), a pizoelectric material connecting with the many electromagnetic clampers(20), and a guide block(30) which are ferromagnetic and adjacent to the both sides of the many electromagnetic clampers(20) and guide moving of the many electromagnetic clampers(20). The electromagnetic loop(95) generated by direction of input current to the wire(25) is formed to pass through the many electromagnetic clampers(20) and the guide block(30). The attractive force is acted between the many electromagnetic clampers(20) and the guide block(30), or the many electromagnetic clampers(20) and the guide block(30) can free slip relatively because the electromagnetic loop(96) is formed outward passing through the many electromagnetic clampers(20).
Patent KR-20000024329-A (KR)
Inventor: PARK SUN RYUNG
IPC: H04N5/45
Filed: 2000-02-08
Abstract: PURPOSE: A method for composing of a sport relay screen is provided to see and hear on a television screen a face of a large number of player anticipating in a game. CONSTITUTION: A method for composing of a sport relay screen includes four procedures. A first procedure is to display a virtual game scene(3) on a computer composed of characters(5) representing each player participating in the game. A second procedure is to make an action the character similar to a motion of the player. The third procedure is to send a virtual game scene on the computer to a video editor. A fourth procedure is to compound main scenes(1) of the game and the virtual game scene and compose as a screen for a television relay.
Patent KR-20010087569-A (KR)
Title: Method and apparatus of free calling service in internet
Inventor: KWAK BONG YEOL
IPC: G06Q50/00
Filed: 2000-03-07
Abstract: PURPOSE: A method and device for a free phone service on the Internet is provided to enhance an advertising effect by accumulating free phone coupon points gradually in accordance with a time and a stage watching an advertisement using a phone by the accumulated points on the Internet and subtracting the points in accordance with fixed phone charges in using a phone. CONSTITUTION: A user connects to a free phone web server and registers as a member through the Internet network(S100-S200). The member who registered in the free phone web server accumulates free phone coupon points through information provided on a web and an advertisement(S300). A set advertisement is displayed when the member performs a free calling using the accumulated coupon points(S400). The accumulated coupon points are subtracted in accordance with phone charges when the member performs a free calling to other person(S500). If accumulated coupon points are exhausted during a free calling, the calling is completed(S600).
Patent KR-20000071542-A (KR)
Title: 스테인레스강(鋼) 배관과 그 접합 방법
IPC: B23K101/06
Filed: 2000-04-01
Abstract: 본 발명은 공급하는 가스를 오염시키지 않고, 고순도를 유지하면서 공급이 가능하고, 내부식성이 뛰어난 반도체 제조용 가스 공급에 적합한 스테인레스강 배관을 제공하기 위한 것이다. 본 발명에 따르면, 맞대기(butt) 용접으로 접합된 스테인레스강 배관의 접합부(1)가 관의 맞대기 접합부(2)의 외벽면(3)부측의 맞대기 접합부(2a)를 용입(溶入 : penetration) 용접부 W에 형성, 접합하여 이루어지고, 내벽면부측의 접합부(2b)를 미용융 상태의 고체상 접합부 S에 형성, 접합하여 이루어지는 부분 용입 맞대기 용접으로 접합되어 이루어지는 스테인레스강 배관과 그 접합 방법을 제공한다.
Patent KR-20010095604-A (KR)
Title: Select lever locking system of automatic transmission for vehicle
Inventor: YOON CHONG YEOL
IPC: B60K20/02
Filed: 2000-04-11
Abstract: PURPOSE: A selector lever locking device of an automatic transmission is provided to increase productivity by reducing assembling process and the number of parts, and to improve reliability and stability by controlling a detent pin with vertical reciprocating motion. CONSTITUTION: A selector lever of an automatic transmission has an indicator checking the movement of the lever, and a selector lever locking apparatus including a detent pin stopper assembly(5), a solenoid for vertical reciprocating motion of the detent pin stopper assembly, a semicircular assembling groove and a guide lever releasing the locking apparatus. The detent pin stopper assembly is composed of a housing(50) having a rectangular section; a trapezoid stopper(52) supported by a spring(51); a symmetrical flange(54) having a through hole(53) out of the housing; and a stopper pin(55) placed at the side of the stopper to actuate a locking pin installed in the solenoid and to make the best use of space. The stopper pin of the detent pin is released with moving the locking pin by the solenoid, and the stopper is moved downward with compressive force of the detent pin to shift the selector lever.
Patent KR-20000049602-A (KR)
Inventor: LEE EUN WOO
Filed: 2000-04-17
Abstract: PURPOSE: A method for an electronic vote based on the Internet by using e-mail is provided to automatically analyze a vote result, as a database of a server which receives vote data transmitted from respondents, by using e-mail. CONSTITUTION: A method for an electronic vote based on the Internet by using e-mail, comprises the steps as follows. An electronic vote is requested. Applications of persons demanding to participate in the requested electronic vote are received, and information on applicants for the vote and e-mail addresses of the applicants are constructed to a database. Passwords and voting sheets for participating in the vote are made and sent to the applicants for the vote through e-mail. Corresponding contents of the vote are transmitted from participants in the vote replied to the passwords and voting sheets of the sent e-mail. The transmitted vote contents are turned to a database, to perform analysis and statistics.
Patent KR-20010097336-A (KR)
Inventor: CHOI SEOK HWAN
IPC: H04W8/24
Filed: 2000-04-21
Abstract: 본 발명은 무선통신기기를 이용한 온라인 게임 제공방법에 관한 것으로, 더욱 자세하게는 무선호출기, 이동전화기, 또는 휴대용 정보단말기 등과 같은 무선통신기기를 이용해 온라인 상으로 게임을 다운받아, 온라인 게임을 즐길 수 있는 온라인 게임 제공방법에 관한 것이다. 
     무선통신망과 공중교환망과 상기 공중교환망에 연결된 게임서버와 상기 게임서버의 제어를 받는 게임정보 데이터 베이스를 포함하는 시스템에 적용되는 무선통신기기를 이용한 온라인 게임 제공방법에 있어서, 게임서버에 접속하는 제1단계; 특정 게임정보를 선택하는 제2단계; 게임의 실행에 따른 객체의 이동을 나타내기 위해 상기 객체의 좌표정보를 포함하는 메시지를 상기 게임서버로 전송하는 제3단계; 및 상기 수신된 메시지에 포함된 좌표정보를 이용해 게임의 객체 이동을 표현하는 제4단계를 포함하는 것을 특징으로 한다.
Patent KR-20000037503-A (KR)
Inventor: YU MEONG CHUN
IPC: B32B27/10
Filed: 2000-04-29
Abstract: PURPOSE: A window-paper is provided to be strong without easily tearing when the window-paper is attached in a frame of a paper sliding door by improving a weak point of an existing window-paper and to present various kinds of patterns such as natural animal and plant patterns, lattice patterns, character patterns and so on in a surface of the window-paper. CONSTITUTION: An unwoven fabric of synthetic resin(2) is stuck in a rear face of a Korean paper for window-paper(1). Various kinds of patterns(3) are printed on a upper face of the Korean paper(1). Because the unwoven fabric of synthetic resin(2) is stuck in the rear face of the Korean paper(1), the window-paper is not easily torn. And because the patterns are printed on the surface of the Korean paper(1), a beautiful antiquity is expressed by expressing patterns such as a bamboo pattern, a lattice pattern, a pattern of Chinese character, a pattern of Korean script and son on.
Patent KR-20000077137-A (KR)
Title: 연마 저지층을 가진 금속 다마신 배선 토포그라피를산화막 충전과 산화막의 선택적 화학 기계적 연마를이용하여 수정하는 방법
IPC: H01L21/768
Filed: 2000-05-03
Abstract: 형태적 불균일을 가진 반도체 표면을 평탄화시키는 공정 및 그 구조에 있어서, 본 발명의 공정은 반도체 표면에 연마 저지층을 코팅하는 단계와, 연마 저지층위에, 두께가 상기 형태적 불균일의 깊이보다 더 두꺼운 충전층을 증착하는 단계와 이 충전층을 연마 저지층까지 아래로 선택적 연마를 하는 단계를 포함한다.
Patent KR-20000049999-A (KR)
Inventor: KIM YOUNG
IPC: G06F1/16
Filed: 2000-05-10
Abstract: PURPOSE: A screen filter and a computer monitor in one body is provided to easy to detach and adhere with each other by installing clips on the monitor of the computer. CONSTITUTION: A clip is installed on the center of a computer monitor, or two clip on the upper monitor. So, It can be solved the trouble of adhering and detaching a screen filter on the computer monitor.
Patent KR-20000050016-A (KR)
Inventor: KIM JIN HAG
IPC: B66B5/00
Filed: 2000-05-10
Abstract: PURPOSE: A safety apparatus for early detection of elevator wire disconnection is provided to achieve an increased safety for passengers while arranging a safety device to be stopped simultaneously with a disconnection of a wire rope of the elevator thus stopping the elevator. CONSTITUTION: A safety apparatus comprises a spring which extends upon disconnection of a wirerope to push portion "a" forward so as to form a circuit as being contact "b", a magnet switch(c) which opens to turn off a motor power so as to stop the operation of motor, an emergency switch(d) installed to be operated within the elevator and which shuts off the power of magnet switch(c) when pressed, a motor supplied with power when the switch(c) is turned off so that a passenger operates the switch(d) arranged inside of the elevator car until he/she reaches safety area, the switch(d) being returned to a state where its contact is connected so as to allow the magnet switch(c) to be supplied with power thus turning off motor power.
Patent KR-20010104012-A (KR)
Inventor: CHA SEUNG SIK
Filed: 2000-05-12
Abstract: 본 발명은 수소저장합금을 이용한 냉난방기에 관한것이다. 
     주지된 바와같이 냉·난방기는, 냉방기 사용시 오염물질인 프레온가스를 냉매로 사용하고, 콤프레샤에 의해 냉매 순환ㄴ을 시키며, 별도의 실외기가 연결설치되어 냉매가 실외기를 통하여 냉각되는 구성이고, 
     난방시에는 주로 석유와 같은 에너지원을 연소시키는 방식으로 구성되어 구성의 복잡함과 더불어 이동이 불가능한 고정식 타잎이다. 
     따라서 본 발명은, 종래 냉·난방기의 문제점을 해결하기 위해 발명한 것으로, 특히 금속과 수소가 반응하여 생성된 수소화물을 두개의 열교환기 내에 삽입설치하고, 이들 사이에 투웨이벨브 또는 포웨이밸브와 펌프를 설치하여 펌프의 압력에 의해 수소화 물에 함유되어 있는 수소가 두개의 열교환기를 번갈아 이동하게 하며, 이과정에서 두개의 열교환기가 번갈아가며 냉각되거나 가열되게 되는데, 냉방시에는 댐퍼를 이용하여 가열된 열교환기를 차폐시킴과 동시에 휀으로써 냉기를 실내로 불어내고, 난방시에는 상기 차폐막이 반대로 작용하게 하여, 내난방을 손쉽게 조절사용할 수 있는 냉난방기를 제공하기 위한 것이다.
Patent KR-20010104809-A (KR)
Inventor: LEE CHANG HO
Filed: 2000-05-16
Abstract: 본 발명은 인터넷 전자상거래를 통한 부동산과 대출, 채권 서비스 방법에 관한 것이다. 
     이에 의하여, 전자상거래용 웹서버에 건설사가 접속해서 회원가입을 하고 로그인을 하며 건설사와 분양정보를 입력하면 금융사의 주택대출정보, 구매자의 성향, 채권/MBS/부동산 정보를 볼 수 있으며, 금융사에 대출을 의뢰할 수 있고 구매자에게 분양을 접수받는다. 
     일반개인이 접속해서 회원가입을 하고 로그인을 하며 개인정보를 수정/삭제하면 건설사의 분양정보, 금융사의 주택대출 상품, 채권/MBS/부동산 정보를 볼 수 있고, 주거형태와 소득/저축을 입력하면 건설사 분양정보와 금융사 대출 정보를 통합한 최적 대출 모형을 제시받아 대출신청, 분양신청을 할 수 있다. 
     금융사가 접속해서 회원가입을 하고 로그인을 하며 금융사와 주택대출 상품을 입력하면 분양정보, 구매자 성향, 채권/MBS/부동산 정보를 볼 수 있고, 건설사와 구매자에게 대출을 승인해 준다. 
     본 발명은 온라인상으로 건설사, 금융사, 구매자 3자를 연결시켜주어 서로간의 정보교류가 촉진되게 하며 부동산 매매를 활성화시킬 뿐만 아니라 부동산 담보대출은 물론 금융사가 구매자/건설사에 빌려준 채권을 유동화 증권으로 매매할 수 있게 함으로써 자금조달을 원활히 하는 효과가 있다.
Patent KR-20010105993-A (KR)
Inventor: KIM JAE U
IPC: G11B17/02
Filed: 2000-05-20
Abstract: A polishing media magazine (350) for improved polishing. The polishing media magazine (350) may include a conditioning element (305) for rapid, uniform conditioning and cleaning of the polishing media (310). The polishing media magazine (350) may include a polishing media (310) having sections (315) of raised elevation to contain the fluid and may include a polishing support platen (355) having features adapted to urge the edges of the polishing media (310) upwards. The polishing media (310) may be roll fed from a supply roll (300) across a support platen (355) and onto a take-up roll (340).
Patent KR-20020001921-A (KR)
Title: Propeller with nozzle for air injection
Inventor: CHOI GIL HWAN
IPC: B63H1/15
Filed: 2000-06-01
Abstract: PURPOSE: A propeller containing a nozzle for injecting air is provided to reduce variable pressure generated by tip vortex through injecting compressed air into an end portion of the propeller and to improve life span of the propeller. CONSTITUTION: A propeller having a nozzle for injecting air comprises an injecting nozzle unit(20) having an anti-singing edge shape by being mounted on a tip portion of a propeller(10); a supply unit(30) connected to a lower end portion of the injecting nozzle unit; a hole mounted in the middle of the supply unit for transferring compressed air; a propeller shaft(40) connected to the supply unit; a transferring pipe(50) mounted in the propeller shaft; a compressor(60) generating the compressed air by being mounted on an engine room; a connecting pipe(70) engaged with the transferring pipe and the compressor of the engine room; a bearing mounted on a connection portion between the connecting pipe and the transferring pipe; and a check valve preventing sea water from letting.
Patent KR-20010109780-A (KR)
Inventor: JANG NAM GI
Filed: 2000-06-02
Abstract: 본 발명은 이물제거장치를 작동시켜  burr 교정 롤에 부착된 이물질 및 칩을 제거한 후 집진하도록 하는 이동식 burr 교정 롤 이물제거 장치에 관한 것이다. 
     본 발명의 바람직한 일실시예는, burr 교정 롤에 부착된 이물을 제거하기 위한 장치에 있어서, 교정 롤 유닛트의 측면에 부착된 구동부와, 상기 구동부의 샤프트가 상하 작동하는 것에 따라 오픈/클로즈 및 좌우 미세구동을 하는 이물 제거장치부와, 상기 이물장치부에 의해 제거된 이물질 및 칩을 집진하는 집진장치부를 포함하여 구성하는 것이 바람직하다. 
     본 발명에 의하면, 기본적인 상부롤의 작동만으로 제거장치의 상하, 좌우 작동을 모두 실시하여 집진까지 수행할 수 있는 간단한 구조로서 이동식 burr 교정롤의 이물질 제거작업을 수행하고 작업성 향상 및 안전작업이 이루어진다.
Patent KR-20010109822-A (KR)
Inventor: NOH TAE YEONG
Filed: 2000-06-02
Abstract: 본 발명은 로터리 압축기의 소음 저감 구조에 관한 것으로서, 본 발명은 케이스 내에 압축실을 구비한 실린더를 설치하여 상기 실린더의 압축실을 통해 냉매가스를 압축시키도록 구성되고, 상기 실린더는 압축실이 구비된 본체부와, 상기 본체부와 일체로 형성되어 상기 케이스에 고정되는 날개부로 이루어지며, 상기 날개부에는 본체부에서 발생되는 원주 방향으로의 진동이 자체 흡수되도록 흡진홈이 형성됨으로써 상기 흡진홈에 의해 압축실에서 발생된 진동이 자체적으로 감쇠되므로 압축기구부의 진동이 케이스로 전달되는 것이 최소화되어 압축기의 진동 및 소음 특성이 향상되도록 한 것이다.
Patent KR-20010049542-A (KR)
Inventor: GALA VALENTIN
IPC: B21C23/21
Filed: 2000-06-13
Abstract: PURPOSE: A tube push out press is provided to make an expansion of a rotary beam not inconveniently operative for guiding a piercing traverse by providing a draw-down outer face with a piercing traverse surrounding frame member or rotary beam side walls in a way that the smallest cross-section of the rotary beam is positioned at a side wall central area regarding the rotary beam length. CONSTITUTION: A direct pipe push out machine(1) mainly has a corresponding beam(2), a block accommodation part(3), a hollow press stamp(4) and an opening sleeve(5) which passes through the press stamp(4). The opening sleeve(5) is supported by a piercing traverse(6) connected with a piercing plunger(7) and a push out main plunger(8). The piercing traverse(6) is accommodated in a notch(9) of a frame-like rotary beam(10) and guided. A concave shape drawdown(11) like a circular arc broken line is formed on outside or periphery of the rotary beam(10) side walls(10a, 10b) remaining at both sides of the notch(9).
Patent KR-20010112808-A (KR)
Title: Textile fillter of glass fiber with micropore and manufacturing method of that
Inventor: JUNG SUN GYU
IPC: B01D39/06
Filed: 2000-06-15
Abstract: A class of pyrazole derivatives is described for use in treating p38 kinase mediated disorders. Compounds of particular interest are defined by Formula (I), wherein R 1, R 2, Ar 1 and HetAr 2 are as described in the specification.
Patent KR-20020000992-A (KR)
Title: Method and system of providing service for taxation business/accounts
Inventor: YEO KUN YOON
Filed: 2000-06-23
Abstract: PURPOSE: A method and a system for providing taxation/accounting services are provided to serve a consulting service to a client by allowing the client to access own taxation/accounting data through a common network. CONSTITUTION: A system(100) for providing taxation/accounting services is comprised of a server(102) and first to M region terminals(1061-106m). The server(102) is connected with the terminals(1061-106m) through a private network. The server(102) and the terminals(1061-106m) are operated by a person responsible to a corresponding region. The person accesses taxation/accounting data of a client stored in a central database(108) through one of the terminals(1061-106m) and the server(102), updates and outputs it. First to N terminals(1041-104n) for the person, which are located in a position where the server(102) is installed, are connected with the server(102). The server(102) is connected with a plurality of client terminals(2001-200l) through the Internet and handles all kinds of requests of the clients. The server(102) provides to the client services of taxation/accounting data updating, retrieval and outputting, tax-affairs reporting, and consulting according to the request of the client.
Patent KR-20000054841-A (KR)
Title: Network system using internet
Inventor: SIM SUNG SIK
IPC: G06Q99/00
Filed: 2000-06-29
Abstract: PURPOSE: A network system using the internet is provided to provide customers with services of making internet portal sites and stores on offline interchange their infra. CONSTITUTION: A network system using internet includes an internet server(6) and a communication terminal equipment(8). Portal sites(2) are loaded and a database(4) of customers who are joined as member is established in the internet server(6). The communication terminal equipment(8) is distributed to a member store(12) and can execute data communication with the internet server(6). The database(10) of customers who use each stores on offline is established in the communication terminal equipment(8). The communication terminal equipment(8) and the internet server(6) interchange customers' data stored in their databases(4,10) through communication.
Patent KR-20020004668-A (KR)
Title: Device for Matching ATM E1/T1 Circuit User
Inventor: LIM JONG GEUN
IPC: H04L12/28
Filed: 2000-07-07
Abstract: PURPOSE: An E1/T1 line subscriber ATM matching apparatus is provided so that a band can be efficiently used in an ATM transmission line by removing data corresponding to a silent sound, by using a compression reproduction unit for compressing and reproducing PCM data converted in an E1/T1 framer unit and a device for processing the compressed PCM data as ATM adaptation layer 2 packets. CONSTITUTION: An E1/T1 framer unit(20) converts line level information of an E1/T1 frame into a frame synchronous signal and a PCM data to be recognized by a compression reproduction unit(21). The compression reproduction unit(21) includes six compression reproducers in order to receive one E1/T1 line. Here, a number of subscriber channels of the E1 frame is thirty, and each of the compression reproducers receives five channels. An ATM adaptation layer 2(AAL2) packet processing unit(22) combines the data transmitted from the compression reproduction unit(21) in the AAL2 type. An ATM cell processing unit(23) converts the AAL2 packet transmitted from the AAL2 packet processing unit(22) into an ATM cell. An ATM exchanger matching unit(24) transmits the ATM cell from the ATM cell processing unit(23) to an ATM exchanger, and also transmits the ATM cell from the ATM exchanger to the ATM cell processing unit(23).
Patent KR-20010015265-A (KR)
Inventor: HIRANUMA JUNJI
IPC: F02B75/16
Filed: 2000-07-10
Abstract: PURPOSE: An engine generator is provided to facilitate maintenance of a fuel supply system of an engine and protect a fuel tank avoiding an increase in weight in an engine generator comprising a power generating unit with the engine and a generator integrated and stored in a case. CONSTITUTION: A power generation unit(46) with an engine E and a generator G integrated is stored inside a case(11) provided with an under cover(16) and right and left side covers(12). A pair of right and left reinforcing frames(26,27) connected to the under cover(16) at a lower end to upwardly extend along an inner surface of the right and left side covers(12) and the like and connected to each other at upper ends thereof to be fastened together to a carrying handle(17) are provided, and a fuel tank(32) is supported on the inside of the reinforcing frames(26,27) while a fuel pump(35) and a fuel cock(36) are mounted thereto.
Patent KR-20020009853-A (KR)
Title: A bus door open/close device for preventing rapid response of mode change
Inventor: SUNG BYEONG JUN
IPC: B60J5/04
Filed: 2000-07-27
Abstract: PURPOSE: A bus door opening device having a sudden operation preventing function according to a mode change is provided to prevent sudden closing of a door by reducing pressure difference of a cylinder, to reduce a producing cost and to improve reliability of operation. CONSTITUTION: A bus door opening device containing a sudden operation preventing function by changing a mode comprises an air tank(1); an emergency valve(2) transferring pneumatic pressure of compressed air of the air tank; first and second magnetic valves(3,3') mounted on a branched pipe; a piston(4') opening or closing a door by being operated through the pneumatic pressure of the compressed air letting through the magnetic valves; a first and second chambers(4a,4b) changed by the piston; a cylinder(4) composed by the first and second chambers; an anti shock unit(10) letting the compressed air according to the state of the door while automatically changing the emergency valve; a sensing unit(11) operated by inner pressure by being interlocked with the cylinder; a contacting unit(12) forming an electric circuit and the first magnetic valve; and a switch(13) connected to the battery.
Patent KR-20020014277-A (KR)
Title: Method for temperature control for automotive air conditioning control
Inventor: JU HWA SEOP
IPC: B60H1/00
Filed: 2000-08-17
Abstract: PURPOSE: A control method of temperature for an air conditioner system of a vehicle is provided to obtain stable output values by comparing temperatures of three time points. CONSTITUTION: A control method of temperature for an air conditioner system comprises the steps of deciding increase, decrease or maintenance of a present value(fn) by comparing the present value to a prior value(fn-1) and the present value to a posterior value(fn+1) and outputting the decided data. If the present value is higher than the prior value and the posterior value is higher than the present value, the posterior value is increased by adding 1 to the present value. If the present value is higher than the prior value and the posterior value is not higher than the present value, the posterior value is maintained the same as the present value. If the present value is not higher than the prior value and the present value is lower than the present value, the posterior value is obtained by subtracting 1 from the present value. Therefore, an error is minimized for a control unit.