baber/WOPTO huggingface dataset:
Patent KR-20070076889-A (KR)
Title: Connecting structure of pcb using anisotropic conductive film, manufacturing method thereof and estimating method of connecting condition thereof
Inventor: HAN CHUL JONG
IPC: H01B5/14
Filed: 2006-01-20
Abstract: A connecting structure of a PCB(Printed Circuit Board) using an anisotropic conductive film, a manufacturing method thereof, and a method for estimating a connecting condition using the same are provided to secure stability in a connecting process and to enhance reliability of a product by confirming a mutual connecting state of a target connecting member. A connecting structure of a PCB includes a plurality of thermally pressed target connecting members(100,200) using an anisotropic conductive film(300) including conductive particles(320) with an insulating adhesive(310) as a base material. At least one of the target connecting members has a flexible characteristic. The surface roughness of the target connecting member is 0.3 to 5.0 micrometers. The target connecting member is an FPC(Flexible Printed Circuit).
Patent KR-20070078335-A (KR)
Title: On-chip memory controller in processor
Inventor: PARK RYUK
IPC: G06F13/14
Filed: 2006-01-26
Abstract: A device for controlling an on-chip memory in a processor is provided to perform a function for optimizing data allocation/use of a scratch pad memory by adding a data management function to an on-chip memory controller. A processor core(400) outputs management information of the scratch pad memory(401) to the on-chip memory controller(403) if necessary while performing a program. The scratch pad memory stores data required for the processor core. The on-chip memory controller stores the data to the scratch pad memory by determining the information required for the processor core and manages the data stored in the scratch pad memory. An input selector(402) selectively connects the processor core or a DMA(Direct Memory Access) part(403C) of the on-chip memory controller to the scratch pad memory. The on-chip memory controller includes a data management controller(403A), a DMC(Dummy Memory Cell) memory(403B), and the DMA part.
Patent KR-20060090178-A (KR)
Inventor: MATSUYAMA HISASHI
IPC: H04N9/73
Filed: 2006-02-06
Abstract: 종래에 RGB 각 수광부의 컬러 필터가 적외광을 투과시키는 경우, 각 색 신호에 각각 적외광에 기인하는 신호 성분(IR 성분)이 중첩되고, 색 밸런스가 무너진다는 과제가 있다.  상기 과제를 해결하기 위해, 본 발명에서는, RGB 각 색 신호에 포함되는 IR 성분(Ir, Ig, Ib)을, IR 성분을 검지하는 IR 수광부로부터의 출력 신호 <IR>에 기초하여 특정한다.  각 색 신호에 포함되는 IR 성분에 관해서만, 각 색신호 사이에서의 비율을, 백색광에서의 RGB 성분비 α:β:Y에 맞추는 보정을 행하여, 보정색 신호를 생성한다. 
       
     수광 소자, 반올림 오차, 보간 처리, 포토다이오드
Patent KR-20070082260-A (KR)
Title: Refrigerator
Inventor: CHEON SANG HYUN
IPC: F25D27/00
Filed: 2006-02-15
Abstract: A refrigerator is provided to maintain freshness of foods by including a lighting device for generating a wavelength maintaining the freshness of the foods, and to reduce manufacturing costs by using few lighting devices. A refrigerator including a storage room(10) having an opened upper surface so as to store foods and a door(20) opening/closing the opened upper surface of the storage room comprises a lighting device(300) and a reflection plate(400). The lighting device is installed in an upper side of the storage room, and maintains freshness of the foods by irradiating light to the door. The reflection plate is installed in a lower surface of the door, and reflects the light irradiated from the lighting device.
Patent KR-20060096292-A (KR)
Inventor: HIRUMA KEI
IPC: G02F1/1337
Filed: 2006-02-24
Abstract: 배향막 형성에 사용되는 액체 재료의 희석 방법으로서, 상기 액체 재료에 소정의 용해 파라미터를 갖는 희석액을 첨가함으로써 상기 액체 재료를 희석하고, 상기 희석액은 상기 액체 재료의 용해 파라미터와 대략 동일한 용해 파라미터를 갖는 용매이다. 
       
     액적 토출 헤드, 액적 토출 장치, 제어 장치, 배향막
Patent KR-20070091492-A (KR)
Title: An apparatus for grinding a valve seat of an engine
Inventor: LEE SANG IL
IPC: B24B15/04
Filed: 2006-03-06
Abstract: An apparatus for grinding the valve seat of an engine is provided to grind the valve seat accurately by a non-expert and to perform a valve seat grinding operation conveniently. An apparatus for grinding the valve seat of an engine comprises a supporting bar(5), a grinding stone(9), a driving unit(11), and a power transmitting shaft(13). The supporting bar is inserted into the valve hole(3) formed at the head(1) of the engine. The grinding stone is installed at the upper end of the supporting bar to grind the valve seat(7). The driving unit is connected with the grinding stone to rotate the grinding stone powered by a motor. The power transmitting shaft is installed to transmit power by connecting the grinding stone with the driving unit.
Patent KR-20070097841-A (KR)
Title: Method for forming flash memory device
Inventor: LIM TAE JUNG
IPC: H01L21/8247
Filed: 2006-03-29
Abstract: A method for forming a flash memory device is provided to improve characteristics of a memory cell and durability of the device by reducing defect of an aluminum oxide film and a trap site. A flash memory device includes a semiconductor substrate(21), a gate pattern, and a side wall protection film. The gate pattern is a structure that a gate insulating film and a floating gate are successively laminated on the semiconductor substrate, and the gate insulating film includes an aluminum oxide film(24). The side wall protection film is formed on both side walls of the aluminum oxide film by performing the wet treatment. In the gate insulating film, a tunnel oxide film(22), a nitride film(23), and the aluminum oxide film (24) are laminated in order.
Patent KR-20070099359-A (KR)
Title: Robot cleaner system having robot cleaner and docking station
Inventor: HAHM JUNG YOON
IPC: A47L9/28
Filed: 2006-04-04
Abstract: A robot cleaner system having a robot cleaner and a docking station is provided to protect connection between the docking station and the robot cleaner from external impact or vibration caused by the system by mounting a lever to the docking station. A robot cleaner system having a robot cleaner and a docking station(200) comprises a combining unit(300) connecting the robot cleaner with the docking station stably. The combining unit includes a lever(320) rotatably installed to the docking station. One part of the lever is linked with the robot cleaner when the robot cleaner docks with the docking station.
Patent KR-20070102010-A (KR)
Title: Method of manufacturing a semiconductor device
Inventor: KWAK NOH YEAL
IPC: H01L21/336
Filed: 2006-04-13
Abstract: A method for manufacturing a semiconductor device is provided to prevent the generation of crystal defects by using a flash annealing process capable of maximizing a solid solubility and preventing the TED(Transient Enhanced Diffusion) of dopant and a post annealing process capable of lessening maximally the stress due to the defects of an ion implantation. A gate(122) is formed on a predetermined region of a semiconductor substrate(100). A flash annealing process is performed on the resultant structure. An ion implantation is performed on the resultant structure to form source and drain junction regions(124,126) in the substrate. A post annealing process is then performed on the resultant structure. A TN-well ion implantation, a P well ion implantation and a cell Vt controlling ion implantation are sequentially performed before the gate forming process.
Patent KR-20070102082-A (KR)
Title: Refrigerator
Inventor: AN GYU HWAN
IPC: F25D29/00
Filed: 2006-04-13
Abstract: A refrigerator is provided to perform mode conversion quickly and conveniently by changing the current menu in practice into another menu using shortcut menu buttons without returning into the initial menu even though the current menu activating on a display unit is existing. A refrigerator includes a display device(10) having a rectangular main body(11), a display unit(12) consisting of a touch screen having the appointed size to perform various tasks conveniently in a touch screen method and plural shortcut menu buttons(13~17) formed on the outside of the display unit to execute the selected menu instantly without operating the touch screen of the display unit. Wherein icon type menu buttons for food control, a schedule, a memo, family letters, environment setup, etc. are displayed on a main screen of the touch screen of the display unit, and the shortcut menu buttons are set up correspondingly to the menu buttons to show a sub-screen for executing the selected menu.
Patent KR-20070102333-A (KR)
Title: Concrete form panel and compositions and apparatus for manufacturing and the manu facturing method
Inventor: JUNG DONG HO
IPC: E04G9/00
Filed: 2006-04-15
Abstract: Adhesive compositions of a concrete form panel are provided to increase frequency of use and service life of a panel by forming an adhesive layer having strong resistance to intense heat, acid and alkali and heightening the adhesive strength between a PET film and plywood. Adhesive compositions(4a,4b) of a concrete form panel(1) comprising comprises plywood(3) having the appointed thickness, a PET film(2) attached to one side of the plywood, an adhesive layer(4) having a double structure formed between the plywood and the PET film, and a coating layer(5) formed on the reverse side of the plywood are manufactured by mixing 1-packing or 2-packing, or, one-to-one mixed liquid type urethane resin based oil adhesives, 1-packing type acryl resin emulsion, rubber resin based EVA water binder, toluene adhesive solvent, solvent based dye, iron oxide and glass fiber in the appropriate ratio to be resistant to intense heat, acid and alkali generated while curing concrete, and applied on the PET film and the plywood and compressed by a press to form an adhesive layer, thereby to increase adhesive strength between the PET film and the plywood.
Patent KR-20070034924-A (KR)
Title: 같은 방향의 균일 전류 방사 전원을 가지는 전기적 루프안테나
IPC: H01Q1/38
Filed: 2006-05-03
Abstract: 본 발명은 수직 방향의 급전부와 두 개 혹은 그 이상의 층을 갖는 전기적 루프 방사 특성의 안테나 및 이를 이용한 RFID 리더기용 안테나에 관한 것이다. 
     본 발명에 따른 안테나는, 방사체로 작용하는 상층 금속판; 상기 상층 금속판과 일정 거리 이격되어 배열되며 방사체로 작용하는 하층 금속판; 상기 하층 금속판과 일정 거리 이격되어 배열되는 접지면; 및 상기 상층 금속판과 상기 하층 금속판의 중심부에서 구비되는 급전 프로브를  포함한다. 
     본 발명은 지표면에 수평으로 놓았을 때 혹은 뒤집어 놓았을 때 수평면에 대해 방사를 하는 전방향성 특성을 가지며 이에 따라 수평면에 부착된 RFID 태그를 인식하는 리더기에 적합하다. 안테나는 각 금속층의 간격과 크기 그리고 급전 프로브의 굵기와 각 금속층의 배열 방식에 따라 임피던스 정합과 주파수의 조절, 안테나 이득 및 방사 패턴의 조절이 용이한 특성을 갖는다. 
       
     Electrical Loop, Uniform Current, Omni-directional, RFID, 적층, 안테나
Patent KR-20060064583-A (KR)
Inventor: PARK HO JIN
IPC: A62C3/02
Filed: 2006-05-12
Abstract: 본 발명은 산불진화시 사용되는 불털이개, 괭이 또는 갈퀴 등의 장애물 제거장비를 평상시엔 스틱으로부터 분리하여 배낭 등에 간편하게 휴대 및 운반토록 하고, 산불이 발생하면 그 입지조건에 따라 적절한 장비로 신속하고 안정감 있게 조립/교체하여 효율적인 초기진화가 가능하도록 한 회전 억제수단을 갖는 산불진화장비 결합구조에 관한 것이다. 
     이 같은 본 발명은 상기 장비의 접촉면에는 상기 스틱의 선단면에 결합하도록 결합부가 형성되고; 상기 장비의 접촉면 및 상기 스틱의 선단면에는 고정홀 및 고정홈이 서로 마주보는 형태로 대향되게 형성되며; 상기 고정홀 및 고정홈에는 회전억제용 결합돌기가 설치되는 것을 특징으로 한다. 
     본 발명에 의하면, 산불진화용 장비와 스틱간의 결합 및 분리가 용이하여 간편하게 배낭 등에 보관 및 휴대할 수 있음은 물론, 이에 따라 산불발생시 입지조건에 맞게 신속하고 적절한 진화용 장비의 교체 사용이 가능하여 적은 인원 및 장비로도 효율적인 초기진화가 가능한 효과를 얻을 수 있다. 
       
     산불, 진화장비, 괭이, 갈퀴, 스틱, 교체, 휴대
Patent KR-20060059947-A (KR)
Inventor: YOU YEN SIL
IPC: A61K8/97
Filed: 2006-05-09
Abstract: 본 발명은 천연과 무공해 원료를 채취하여 살균 세정제를 제조하는 원료로 사용하며, 여성들의 생식기 질을 세정하거나 세척하는 살균성 세정제의 발명이다. 본 발명의 제조에서 투입되는 어성초와 녹차는 음용을 주로 하거나 음식으로 가공하여 섭취하는 경향이 많았으나 이 물질의 살균성분을 바로 여성 성기의 질에 침투케 하여, 질 내부의 모든 잡균과 세균 및 분비물의 지방질을 세척해 주며, 부인병을 예방하고, 질의 내부를 세정해 주는 어성초[표1]와 녹차[표2]의 추출액을 엑탄올(에칠 알코올)을 주원료로 하며, 이들을 적당한 비율에 의해 상호 혼합하여 성질이 전혀 새로운 독립적인 조성물인 천연 살균성 세정액을 제조하는 것이다. 
     즉 여성들이 흔히 쓰는 뒷물을 천연식물과 알코올로 제조하는 것이다 
     본 발명의 목적을 실현하기 위해서는 어성초와 녹차의 추추액과 엑탄올(에칠 알코올)과 천연 향료와 천연 착색 제를 적당한 비율에 의해 혼합하여 살균성세정 액을 제조하는 것이다. 
     본 발명의 특징은 화학물질이 하나도 첨가되지 않은 순수한 식물성과 천연 물질을 사용했으며, 식물성 자체가 살균력이 있으며, 지방질 제거 기능을 그대로 원용한 조성물이다. 
     어성초는 살균성이 뛰어나며, 녹차 액은 지방질을 제거기능이 뛰어나기 때문에 이 두 물질과 엑탄올 (에칠 알코올)의 만남은 강력한 세정 분 아니라 강력한 살균력을 가지게 된다. 
     본 발명으로 종래의 세정액 보다는 그 기능을 한층 높여 고급화했으며 살균력이 높은 천연적인 물질만을 사용하였으므로 피부의 가장 약한 부위의 손상을 막고 분비물을 제거해주며 부인병 예방을 충분히 하도록 하는 효과를 얻을 수 있다 
     어성초는 여러 가지 건강보조식품으로 개발하기도 했지만 식품이 아닌 의약품으로도 개발이 가능하게 됐다. 
     특히 본 발명품은 데카노일 아세트알데히드(decatnoyl acetalehyde)의 강한 살균력으로 설파제 보다 4만 배나 강한 식물성 항균성이 있다고 일본 고스케다쿠오 (小管卓팀夫)박사의 연구팀에 의해 알려진 어성초의 성분[표1]이 투입되고, 지방질 제거에 효과가 있다는 연구 발표된 녹차의 성분[표2]을 투입하기 때문에 세정액으로 높은 품질이 예상된다. 
     
     천연 살균성 세정액 제조방법     어성초, 녹차, 엑탄올의 혼합으로 제조된 살균 세정액
Patent KR-20070111586-A (KR)
Title: Polarizer and method for attaching the same and apparatus for attaching the same
Inventor: WON DONG HYUP
IPC: G02F1/13
Filed: 2006-05-18
Abstract: A polarizer and a method and an apparatus for attaching the same are provided to prevent an adhesive layer form being polluted during adhesion of a polarizing plate because no adhesive force of the adhesive layer is generated at a normal temperature, and reduce polarizing plate adhering time by simultaneously adhering the polarizing plate to upper and lower sides of an LCD(Liquid Crystal Display) panel. A polarizing layer(110) has a predetermined polarizer. An adhesion layer(130) is formed in a lower part of the polarizing layer and made from microwave reactive adhesive. The polarizing layer includes at least one support layer(120a,120b). The polarizing layer includes at least one protection layer(140a,140b). Adhesive force of the microwave reactive adhesive is generated when microwaves are irradiated.
Patent KR-20070119140-A (KR)
Title: Liquid crystal display and driving method thereof
Inventor: CHO JAE HYUN
IPC: G09G3/36
Filed: 2006-06-14
Abstract: A liquid crystal display device and a driving method thereof are provided to improve a visibility transmittance of the display device by generating an impulsive data voltage by adding a normal data voltage to a block data voltage, and applying the impulse data voltage. A liquid crystal display device includes plural pixels(PX), gate and data lines, and a data driver(500). The pixels are arranged in a matrix formation. The gate lines(G1-Gn) and the data lines(D1-Dm) are connected to the pixels. The data driver sequentially applies a normal data voltage and a block data voltage to the data lines during one frame. A second period, during which the block data voltage is applied, is shorter than a first period, during which the normal data voltage is applied.
Patent KR-20080007736-A (KR)
Title: Method for transmitting and receiving digital multimedia broadcasting data
Inventor: SHIN BO YOUNG
IPC: H04N5/44
Filed: 2006-07-18
Abstract: A method for transceiving DMB(Digital Multimedia Broadcasting) data is provided to extract an accurate decoding parameter by clarifying the number of sub channels in an FIC(Fast Information Channel) within a DMB transmission frame, and reduce information parsing time of the FIC. A method for transceiving DMB(Digital Multimedia Broadcasting) data comprises the following steps of: configuring an FIC(Fast Information Channel) with information about the number of sub channels included in an MSC(Main Service Channel) of a DMB transmission frame; and transmitting a signal configured with the DMB transmission frame including the configured FIC. The information about the number of sub channels is included in an FIG(Fast Information Group) data field included in the FIC.
Patent KR-20080011940-A (KR)
Title: Apparatus for indicating charge state of battery in mobile terminal
Inventor: NAM SANG MIN
IPC: H02J7/00
Filed: 2006-08-01
Abstract: An apparatus for indicating a charging state of a battery in a mobile terminal is provided to accurately notify a user of the charge state of the battery and a call receiving state by alternately turning on/off a charge LED(Light Emitting Diode) and a call LED. An apparatus for indicating a charging state of a battery(19) in a mobile terminal includes a charge managing unit(11), a call signal managing unit, and an LED indicating unit(15), and a charge controlling unit(13). The charge managing unit detects the charging state of the battery inside and generates a charge signal when the mobile terminal is turned off. The call signal managing unit detects reception of a call and generates a call signal when the mobile terminal is turned on. The LED indicating unit has a charge LED to indicate the charge state of the battery and a call LED to indicate the reception of the call. The charge controlling unit controls the charge LED and the call LED to be turned on/off according to the charge signal and the call signal.
Patent KR-20070019581-A (KR)
IPC: H01M4/02
Filed: 2006-08-10
Abstract: 본 발명은 넓은 충전 심도 범위에서 균일한 고출력 특성을 나타낼 수 있는, 하이브리드 전기 자동차용 이차 전지 등에 적합한 비수 전해질 이차 전지에 관한 것이다.  
     전이금속으로서 니켈 및 망간을 함유함과 동시에 공간군 R3m에 귀속되는 결정구조를 갖는 제 1의 리튬 함유 전이금속 산화물 Li a Ni x Mn y O 2 (식중, a, x 및 y는 1≤a≤1.5, 0.5≤x+y≤1, 0＜x＜1 및 0＜y＜1의 관계를 만족한다)과, 전이금속으로서 니켈, 망간 및 코발트를 함유함과 동시에 공간군 R3m에 귀속되는 결정구조를 갖는 제 2의 리튬 함유 전이금속 산화물 Li b Ni p Mn q Co r O 2 (식중, b, p, q 및 r은 1≤b≤1.5, 0.5≤p+q+r≤1, 0＜p＜1, 0＜q＜1 및 0＜r＜1의 관계를 만족한다)과의 혼합물, 또는 제 1의 리튬 함유 전이금속 산화물과 코발트산 리튬과의 혼합물을 양극 활물질로서 이용하는 것을 특징으로 한다.  
       
     비수 전해질 이차 전지, 양극 활물질, 리튬 함유 전이금속 산화물, R3m
Patent KR-20080015980-A (KR)
Title: Loader for operation button's ejection and arrangement
Inventor: KIM YUNG HWAN
IPC: H01H11/00
Filed: 2006-08-17
Abstract: An operation button ejection and arrangement loader is provided to minimize a time for ejecting and arranging by ejecting a plurality of operation buttons and arranging at desired intervals every reciprocating of a moving guide and an ejection bogie. An operation button ejection and arrangement loader(10) comprises guide rails(11), a moving guide(12), an ejection bogie(13), an ejection block(14), a holder(15), and a plurality of ejection units(16). The guide rails are installed to correspond to each other. The moving guide moves forward and backward through operation of a servo-motor and a driving screw by being installed on the guide rail perpendicularly. The ejection bogie moves right and left by the servo-motor and the driving screw by being installed on the movement guide. The ejection block moves up and down by the operation of the servo-motor and the driving screw by being installed on the ejection bogie. The holder is installed on the ejection block and has the plurality of ejection units on a lower part.
Patent KR-20080018481-A (KR)
Title: Catalyzed particulate filter regeneration system of diesel vehicle and method thereof
Inventor: SEO MOO SEOCK
IPC: F01N3/02
Filed: 2006-08-24
Abstract: A CPF(Catalyzed Particulate Filter) regeneration system of a diesel vehicle and a method thereof are provided to prevent damage to an engine and the inside of an engine room by controlling regeneration of the CPF in stages according to temperatures of coolant and exhaust gas. A method for regenerating a CPF of a diesel vehicle includes the steps of: calculating accumulation of particulate matters from the pressure difference between an inlet and an outlet by a control unit and judging whether a regeneration condition of the CPF is satisfied(S102,S103); regenerating the CPF through main injection retard or post injection by the control unit if the regeneration condition of the CPF is satisfied(S104); stopping the regeneration of the CPF if a first condition is satisfied during regeneration of the CPF(S108); resuming the regeneration of the CPF if a second condition is satisfied when the regeneration of the CPF is stopped; rerunning the regeneration of the CPF if a third condition is satisfied when the regeneration of the CPF is stopped; and forcibly regenerating the CPF regardless of temperatures of coolant and exhaust gas until the accumulation of the particulate matters is below 50% in case that the accumulation of the particulate matters is 100% when the regeneration of the CPF is stopped(S119).
Patent KR-20080018693-A (KR)
Title: Apparatus and method for testing platform independent of platform
Inventor: HWANG HYE SOOK
IPC: G06F11/28
Filed: 2006-08-25
Abstract: A platform independent test apparatus and a method thereof are provided to transplant a test case based on a specified platform conveniently without modifying the test case independent on the platform, thereby reducing development time. Test execution information including a name and a content of a predefined API(Application Program Interface) is created(S21). The test execution information is mapped with the name and the content of a test target platform(S22). A test for the test target platform is performed by using the test execution information which is mapped previously(S23). The mapping process is performed by a plurality of mapping units respectively corresponding to each platform. The name and the content are included in the test execution information through a header file.
Patent KR-20080020900-A (KR)
Title: A refrigerator
Inventor: ANDREY KORSHUNOV
IPC: F25C5/02
Filed: 2006-09-01
Abstract: A refrigerator is provided to facilitate discharge of ice cubes by periodically moving the ice cubes in an ice bank with a contact rod, and to obtain more available room in a freezer compartment with the ice bank having reduced front and back width. A refrigerator comprises a door, an ice bank, a freeze prevention unit, and a driving unit. The ice bank is provided on the door. The freeze prevention unit, periodically reciprocating within the ice bank, is in contact with the stored ice cubes to prevent the ice cubes from forming into a mass. The driving unit is connected to the freeze prevention unit for driving it. The freeze prevention unit comprises a rotary plate(26) mounted onto an inner wall of the ice bank, a contact rod(28) whose one end is rotatably connected to the rotary plate and the other end is in contact with the ice cubes, a guide slit(30) provided inside the contact rod, and a holder(32) penetrating the guide slit to be secured on the inner wall of the ice bank. When the rotary plate rotates, the contact rod rotates and reciprocates as the guide slit moves around the holder to be in contact with the ice cubes and move therebetween.
Patent KR-20080021278-A (KR)
Title: Apparatus and method for data communications using battery power information in sensor networks
Inventor: OH JONG TAEK
IPC: H04B7/24
Filed: 2006-09-04
Abstract: A data communication device using power state information in a sensor network and a method thereof are provided to enable each node to actively notify of power states of the corresponding nodes, thereby exactly and simply perceiving a power state of the overall sensor network, consequently the perceived state can be used for setting optimum functions of each node or optimum paths for data transmission. A sensing unit(13) collects peripheral information. A controller(14) collects power state information of other nodes or distributes power state information of self nodes, and performs path setup for data transmission or sets processing functions of the nodes by using the power state information. A wireless communication unit(15) transmits/receives data with the other nodes. A power supply unit(16) supplies power to each part of self nodes. A measurer measures size of currents or voltages of the power. An AD converter(17) measures the voltage of power source and the strength of current.