• 제목/요약/키워드: HAL

검색결과 264건 처리시간 0.03초

Improved Performance of Microbial Fuel Cell Using Membrane-Electrode Assembly

  • PHAM THE HAl;JANG JAE KYUNG;MOON HYUN SOO;CHANG IN SEOP;KIM BYUNG HONG
    • Journal of Microbiology and Biotechnology
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    • 제15권2호
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    • pp.438-441
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    • 2005
  • A mediator-less microbial fuel cell (MFC) was used to determine the performance effects of a membrane­electrode assembly (MEA). The MFC with an MEA generated a higher current with an increased coulomb yield when compared to an MFC with a separate cathode. Less oxygen was diffused through an MEA than through a Nafion membrane. The MFC performance was improved with a buffer, although a high-strength buffer reduced the performance.

제작 조건에 따른 Se박막의 결정구조 및 표면형상에 관한 연구 (A Study on Crystal Structure and Surface Morphology of Se Thin Film by Fabrication Condition)

  • 박계춘;임영삼;정해덕;이진;정인성;김종욱;구할본
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1998년도 추계학술대회 논문집
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    • pp.331-334
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    • 1998
  • Crystal structure and surface morphology of Se thin film fabricated by EBE method had been studied. Se thin film was deposited with amorphous structure until substrate temperature of l00$^{\circ}C$. But Se thin film was grown with monoclinic structure at substrate temperature af over 150$^{\circ}C$, and its lattice constant of a, b and c was 12.76${\AA}$, 9.15${\AA}$ and 10.41${\AA}$ respectively. Also, after heat-treatment at 150。 for 15 min with substrate temperature of l00。, amorphous Se was proved to be hexagonal structure, and its lattice constant of a and c was 4.27${\AA}$ and 4.83${\AA}$ respectively.

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$Alq_3$의 녹색발광특성에 관한 연구 (A Study on the Green Eemission Ccharacteristics of $Alq_3$)

  • 강용철;전동규;송진원;김영근;김주승;구할본;이경섭
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2002년도 하계학술대회 논문집 Vol.3 No.2
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    • pp.957-960
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    • 2002
  • Electroluminescence(EL) from conjugated polymers has recently received great attention because polymer light-emitting diodes(LEDs) clealy have potential for applications such as large-area displays. The operation of polymer LEDs is based on double injection of electrons and holes from the elextrodes, followed by formation of excitons whose radiative decay results in light emission at wavelength characteristic to the material. In this paper, we fabricated the single layer EL device using $Alq_3$ as emitting material. According as turn on voltage could know about 5.5V in voltage-current characteristics and voltage rise, current could see that increase as non-linear. Current and ruminance can see that express similar relativity in voltage, and could know that ruminance is expressing current relativity.

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P3HT와 PVK 블렌드 막에서의 전계 발광 특성 (Electroluminescence Properties from Blend films of poly(3-hexylthiophene) and poly(N-vinylcarvazole))

  • 김대중;김상기;구할본;정운조;박계춘
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2002년도 하계학술대회 논문집 Vol.3 No.2
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    • pp.972-975
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    • 2002
  • Electroluminescence(EL) devices based on organic thin layers have attracted lot of interests because of their application as display. One of the problems is red material. It offered a short life and poor emission efficiency to boot. In this study, this problem can be solved by using a multi-layer device structure. Organic electroluminescent devices which are composed of organic thin multi-layer films are fabricated. The basic structure is ITO / Emitting layer / LiP / Al EL device in which Hole transport/Electron blocking PVK layer was blending. We demonstrate the enhancement of eletroluminescence (EL) from blends of poly(3-hexylthiophene) in poly(N-vinylcarvazole). The emitting layer is consisted of a host material(PVK) and a guest emitting material(P3HT). It was showed higher EL intensity and their electro-optical properties were investigated.

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Robot software component interface abstractions for distributed sensor and actuator

  • Yang, Kwang-Woong;Won, Dae-Heui;Choi, Moo-Sung;Kim, Hong-Seok;Lee, Tae-Geun;Kwon, Sang-Joo;Park, Joon-Woo
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2005년도 ICCAS
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    • pp.2285-2289
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    • 2005
  • Robot is composed of various devices but, those are incompatible with each other and hardly developing reusable control software. This study suggests standard abstract interface for robot software component to make portable device and reusable control software of robot, based on familiar techniques to abstract device in operating systems. This assures uniform abstracted interface to the device driver software like sensor and actuator and, control program can be transparent operation over device. This study can separately and independently develop devices and control software with this idea. This makes it possible to replace existing devices with new devices which have an improved performance.

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리튬 고체전지용 $LiMn_2O_4$ Composite Cathode의 충방전 특성 (Charge/discharge Properties of $LiMn_2O_4$ Composite Cathode for All-solid state Rechargeable Batteris)

  • 김종욱;박계춘;구할본
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1998년도 하계학술대회 논문집 D
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    • pp.1511-1513
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    • 1998
  • The purpose of this study is to research and develop PEO/PVDF electrolytes and $LiMn_2O_4$ composite cathode for all-solid state lithium rechargeable battery. We investigated AC impedance response and charge/discharge cycling of $LiMn_2O_4$/SPE/Li cells. The cell resistance was decreased so much initial charge process from 0% SOC to 100% SOC. The radius of semicircle of $LiMn_2O_4$/SPE/Li cell was so much from initial state to 20th cycling. The discharge capacity of the $LiMn_2O_4$ composite cathode was 144mAh/g based on $LiMn_2O_4$.

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Poly(3-octylthiophene) 전계발광소자의 발광특성 (Emitting characteristics of poly(3-octylthiophene) electroluminescent devices)

  • 서부완;김주승;구할본
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2000년도 영호남학술대회 논문집
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    • pp.131-134
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    • 2000
  • Electroluminescent[EL] from conjugated polymers has recently received great attention because polymer light-emitting diodes[LEDs] clearly have potential for applications such as large-area displays. The operation of polymer LEDs is based on double injection of electrons and holes from the electrodes, followed by formation of excitons whose radiative decay results in light emission at wavelength characteristic to the material In this paper, we fabricated the single layer EL device using poly(3-octylthiophene)[P3OT] as emitting material. The orange-red light was clearly visible in a dark room Maximum peak wavelength of EL spectrum saw at 640nm in accordance with photon energy 1.9eV. And we know that ionization energy of P3OT is 4.7eV from the cyclic voltammetry.

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HAI 제어기에 의한 유도전동기 드라이브의 고성능 제어 (High Performance of Induction Motor Drive with HAl Controller)

  • 남수명;최정식;고재섭;정동화
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2005년도 학술대회 논문집 정보 및 제어부문
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    • pp.570-572
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    • 2005
  • This paper is proposed adaptive hybrid artificial intelligent(HAI) controller for high performance of induction motor drive. The design of this algorithm based on fuzzy-neural network(FNN) controller that is implemented using fuzzy control and neural network. This controller uses fuzzy rule as training patterns of a neural network. Also, this controller uses the back-propagation method to adjust the weights between the neurons of neural network in order to minimize the error between the command output and actual output. A model reference adaptive scheme is proposed in which the adaptation mechanism is executed by fuzzy logic based on the error and change of error measured between the motor speed and output of a reference model. The control performance of the adaptive FNN controller is evaluated by analysis for various operating conditions. The results of experiment prove that the proposed control system has strong high performance and robustness to parameter variation, and steady-state accuracy and transient response.

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Ti 전극의 Lift-off 공정을 이용한 홀 패턴 형성과 TCO-less 염료감응형 태양전지의 응용 (A Formation of Hole Pattern on Ti Electrode by Lift-off and Its Application to TCO-less Dye-sensitized Solar Cells)

  • 정행윤;기현철;구할본
    • 한국전기전자재료학회논문지
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    • 제28권3호
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    • pp.175-179
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    • 2015
  • In this study, we propose Ti hole pattern structure on the transparent conductive oxide (TCO) less dye-sensitized solar cells (DSSCs) using the lift-off process to improve the low light transmittance and low efficiency caused by opaque Ti electrode. The formation of Ti hole patterns make it possible to move the dye adsorption and electrolyte. The DSSCs with Ti hole patterns showed a higher photoelectric conversion efficiency (PCE) than those with general structure by 11.1%. As a result, The Ti hole pattern structure can be improved to increase the light absorption of the dyes and PCE of the TCO-less DSSCs is also increased.

산소와 UV 조사된 $TiO_2$ 광전극의 표면형상과 전기화학적 특성 (The morphology and Phtoelectrochemical properties of $TiO_2$ electrode with UV Treatment and Oxygen Injection)

  • ;;;구할본
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2010년도 하계학술대회 논문집
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    • pp.240-240
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    • 2010
  • In this paper, in these case of photoelectrode using UV treatment after oxygen solar conversion efficiency is increased. According to oxygen injection UV treatment will removal residual organics and increase the TiO2 surface area but also UV treatment can affect the same chemical action of ozone treatment. More porous networks and larger porosities were obtained in the TiO2 films prepared UV treatment after oxygen injection.

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