• 제목/요약/키워드: current trace

검색결과 243건 처리시간 0.03초

펄스차이 흡착법김전압전류법에 의한 갈륨 정량 (Determination of Gallium by differential Pulse Adsorptive Stripping Voltammetry)

  • 손세철;엄태윤
    • 대한화학회지
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    • 제36권6호
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    • pp.889-893
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    • 1992
  • Ga-Morin 착물에 대한 흡착벗김전압전류법적 연구를 HMDE를 사용하여 0.1M 아세테이트 완충용액에서 연구하였다. HMDE의 수은 표면에 흡착된 착물의 환원피크 전류에 미치는 여러 분석조건들의 영향을 논의하였으며, 여러 양이온 및 계면활성제의 방해효과에 대하여 검토하였다. 본 연구에서의 검출한계는 흡착시간이 60초일 때 1.7nM 이었으며, 4 ${\mu}$g/l의 Ga를 7회 분석하였을 때 상대표준편차 2.8% 이었다.

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복사열에 노출된 소방용 폼 약제의 열적 특성 연구 (Thermal Characteristics of Fire-Protection Foams Exposed to Radiant Heating)

  • 김홍식;황인주;김윤제
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2004년도 춘계학술대회
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    • pp.1570-1575
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    • 2004
  • In order to evaluate the performance of fire-fighting agents used to protect structures from heat and fire damages, the thermal characteristics of fire-protection foams are experimentally investigated. The current research focuses on the destruction of a fire-fighting foam subjected to heat radiation. A simple repeatable test for fire-protection foams subjected to fire radiation is developed. This test involves foam generation equipment, a fire source for heat generation, repeatable test procedures, and data acquisition techniques. Results of the experimental procedure indicated that each thermocouple within the foam responded in a similar manner and gradually to a temperature of $15^{\circ}C{\sim}20^{\circ}C$. At this point, each trace generally rises to a temperature of approximately $90^{\circ}C$. The temperature gradient in the foam as time passes increases with increased foam expansion ratio. In addition, it is determined that the temperature gradient along the foam for depth decreases with increased foam expansion ratio.

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차량통행특성에 따른 도로교의 동적거동변화 (Dynamic Behaviors of Highway Bridges under Multi-Traffic Loads)

  • 김상효;이상호;윤성호
    • 한국전산구조공학회:학술대회논문집
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    • 한국전산구조공학회 1997년도 봄 학술발표회 논문집
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    • pp.185-191
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    • 1997
  • The study presents the linear dynamic analysis of bridges under vehicular movement to examine the performance characteristics due to the various structural and loading conditions. The road surface roughness and bridge-vehicle interactions are considered. The road surface profiles for the approaching roadway and bridge decks are generated from power spectral density functions for different road roughness conditions. A new filtering method using the wheel trace is proposed to obtain the more rational bridge-vehicle interactions from the randomly generated road surface. The dynamic responses of various bridges designed according to current design practice are examined, in which important structural parameters(such as span length, girder spacing, etc.) are considering systematically. In addition, the traffic conditions of multi-truck traveling either consecutively on the same lane or side-by-side on the adjacent lanes are also evaluated.

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차량 트레킹을 통한 매립위치의 검출 (Detection of Dumping Position Using Vehicle Tracking)

  • 이동규;이영대;조성윤
    • 한국컴퓨터정보학회:학술대회논문집
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    • 한국컴퓨터정보학회 2012년도 제46차 하계학술발표논문집 20권2호
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    • pp.433-434
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    • 2012
  • 본 연구에서는 쓰레기 매립장 내에서의 차량의 이동경로와 매립시점을 판단할 수 있는 방법을 제시한다. 현재의 영상과 배경영상의 차를 구하여 차량의 이동경로를 추적하고 이동경로의 형태로부터 정차 여부를 판단할 수 있으며, 정차시의 영상과 배출구의 개방영상과의 비교를 통해 폐기물의 매립시점을 검출할 수 있도록 한다.

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AC PDP의 배경광 잔상특성 (Characteristics of Image Sticking Observed During Background Display in AC-PDP)

  • 류재화;임성현;김동현;김중균;이호준;박정후
    • 대한전기학회논문지:전기물성ㆍ응용부문C
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    • 제53권2호
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    • pp.91-96
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    • 2004
  • In darkroom condition, it was observed that a white picture pattern lasted several minutes leaves a recognizable trace in subsequent black background picture. Although this is not a serious problem for the most current public display or home TV applications, the image sticking should be minimized for future high quality multimedia display applications. In order to characterize this picture memory effect having relatively long time scale, spatially resolved luminance measurement and light waveform measurement have been performed. Pixels located at the outer boundary of white pattern previously displayed shows highest luminance. These cells also shows fastest ignition at the ramp up reset sequence. The luminance and ignition voltage differences between boundary cells and the other cells are increased with display duration and number of sustain-pulse. It is speculated that image sticking observed at the boundary cell is originated from the transport of charged particles and re-deposition of reactive species such as Mg, O provided from strong sustain discharge region.

전기화학적 방법에 의한 Cu-Ni 다층박막합금의 수학적 모델링 (Mathematical Modeling on Electrodeposition of Compositionally Modulated Cu-Ni Alloy)

  • 박경완;이철경;손헌준
    • 한국표면공학회지
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    • 제27권4호
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    • pp.223-233
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    • 1994
  • It is well known that compositionally modulated Cu-Ni alloy can be produced by an electrochemical method in Ni sulfate solution containing trace amount of Cu. a mathematical model is presented to describe the current distribution and weight percent of Cu in Ni layer on the rotating disk electrode. The model includes convective-diffusion equation, the Laplace's equation and various overpotentials, and is solved numerically. The thickness of Cu layer is almost uniform whereas the thickness of Ni layer as well as the Ni/Cu weight ratio are increased approaching to the edge of the disk. These results agree well with the experimental values. The ohmic potential drop is suggested as a major cause of a nonuniformity in Ni layer. The optimum plating condition for the fabrication of susperlattice is proposed based on the results of this study.

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운전자간 드라이빙 패턴에 따른 연비·온실가스 특성 (Characteristics of Fuel Economy and CO2 according to Driving Pattern of Drivers)

  • 강민경;권석주;서영호
    • 융복합기술연구소 논문집
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    • 제6권1호
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    • pp.13-16
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    • 2016
  • The purpose of this study is analysing the characteristics of vehicle fuel economy and greenhouse gase emissions according to driving pattern of drivers. Current fuel economy has not established on official test methods. The difference between actual fuel efficiency and specification fuel efficiency bring up consumer complaints and misunderstandings about fuel economy. Against this background, The country is progressing the study on influence of the fuel efficiency according to variety test conditions. This study analyze the driving pattern of the different drivers and influence of the fuel efficiency according to driving pattern of different drivers.

Determination of Chromium(VI) by Differential-Pulse Polarography with a Sodium Borate Supporting Electrolyte

  • Hong, Tae-kee;Czae, Myung-Zoon
    • Bulletin of the Korean Chemical Society
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    • 제9권2호
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    • pp.77-80
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    • 1988
  • A suituable choice of supporting electrolyte medium for trace level determinations of chromium(VI) by differential pulse polarography is described. A comparative study suggests that sodium borate buffer is superior to ammonium acetate, ammonium tartrate, and especially to NaF which was recently known to be one of the most proper medium for the purpose. With 0.01 M borate, the best combination of high sensitivity, well-defined base line, and freedom from common interferents was attained. With $5.0{\times}10^{-7}$M Cr(VI), tenfold excesses of Cu(II) and Fe(III), and a five hundred-fold excess of $Cl^-$ do not change the peak current by more than about 1%. And the detection limit was $5.0{\times}10^{-8}$M Cr(VI).

A Data Provenance System for Myanmar Rice Cycle Based on Ethereum Blockchain

  • Latt, Cho Nwe Zin;Rahmadika, Sandi;Rhee, Kyung-Hyune
    • Journal of Multimedia Information System
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    • 제8권1호
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    • pp.35-44
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    • 2021
  • The Myanmar rice cycle's existing system is still relying on a third party to manage every rice data information from several organizations. It is inconvenient to supervise simultaneously due to the unreliability of information provided by organizations. Thus, the rice cycle's original data is challenging to be utterly trusted since irresponsible parties can manipulate the current state of information. Moreover, the applied system does not preserve a proper incentive for the involved parties. In this paper, we leverage the Ethereum blockchain to be adopted to tackle the aforementioned issues. The main objective is to build trust between parties in the Myanmar rice cycle system. Our proposed scheme allows customers to check and trace information about the rice cycle information without worrying about the integrity of the data. Furthermore, the authorized parties are also rewarded by the government through Ethereum smart contract features. Eventually, our scheme achieves traceability in the rice chain system and leads to the complete digitization and automation of the rice cycle information.

WEB-BASED SERVICE REQUEST & FEEDBCK SYSTEM: THE LIFE CYCLE MANAGEMENT AS CONTINUOUS CUSTOMIZATION OF FACILITY INFORMATION

  • Jinsu Jeong;Kwang Jun Lee;Valerian Miranda
    • 국제학술발표논문집
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    • The 1th International Conference on Construction Engineering and Project Management
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    • pp.836-840
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    • 2005
  • This research investigates the feasibility of Web technology as a means of delivering facility information for better support facility operation and maintenance. Our research proposes a Web-based feedback system as a pragmatic solution to the limitations of current FM (Facility Management) processes. In practice work orders and records are often misplaced resulting in lower efficiency and customer satisfaction. This may be overcome by a system that states information digitally and provides a Web-based interface. The interface could allow customers to report facility problems, trace their work order in progress, view schedules for maintenance and provide feedback for service online. The benefit for a FM department is that it can receive feedback on performance which would improve the quality of service and build a record of practical experiences.

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