• Title/Summary/Keyword: lance

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Preliminary Testing of an Urban Air Quality Model for Ozone Forecasting over the Sydney Basin (시드니만의 오존예측을 위한 도시대기질모델의 예비검사)

  • Speer, Milton S.;Leslie, Lance M.
    • Journal of Environmental Science International
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    • v.13 no.8
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    • pp.733-737
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    • 2004
  • FThe aim of this study was to carry out a preliminary test of the air quality modelling system (HIRES-AIRCHEM) developed at The University of New South Wales, particularly with regard to the forecast ozone distribution. This was achieved by assimilating the New South Wales State Environment Protection Authority (EPA) emissions inventory, consisting of road and non-road sources, and running the system over the Sydney metropolitan area for the four day period 25-28 February 1998. During this period ozone readings exceeded the EPA's goal of 8pphm on several occasions. The model forecasts of ozone distribution verified well with the EPA's ozone readings. This result has important implications for possible future use of the system as a tool for routinely predicting and assessing air quality.

Fall arresting system

  • Leamon, T.S.;Malone, C.;Son, D.H.
    • Journal of the Ergonomics Society of Korea
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    • v.10 no.1
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    • pp.23-28
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    • 1991
  • A major inhibition of past work in a slip/fall accident study has been due to the lack of a facility and a methodology to experimentally investigate such behavior without expowting human subjects to the natural danger of injury resulting from a fall. In order to carry out a slip/fall research, a unique facility must be created specially to investigate falling and slipping behavior. One component of this facility will be used to focus a research towards experimental investigations of the basic mechanisms involved in falls. Especially, this compo- nent must be designed, developed, and fabricated to provide passive, reactive support at the point of loss of ba- lance. This component must allow both normal and reduced friction surfaces to be designated to investigate human falling in the experimental conditions. This study will address how a fall arresting system was designed and it would be implemented in actual case of a slip/fall study.

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Validity Study on Installation of a Combustion Burner for Electric Arc Furnace in Steel Making Plant by the Heat Balance Check and Case Study (열정산과 적용사례 조사에 의한 제강 전기로용 조연버너 적용 타당성 연구)

  • Kim, Hyun-Jin;Hur, Jin-Huek;Moon, Seung-Jae;Yoo, Hoseon
    • Plant Journal
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    • v.6 no.1
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    • pp.71-75
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    • 2010
  • In this study, the validity study has been carried out to apply the combustion burner in an electric arc furnace. The validity of applying the combustion burner has been studied in the aspect of the operation through the calculation of heat balance. The average decrease rate of power on time is 11.2%. When the maintainability is compared to the door lance manipulator type, the multi-functional combustion burner is simple to replace and repair. The location of burner can be adopted according to the drawings which are recommended in this study. As a result, the validity of applying the combustion burner to improve an efficiency of electric arc furnace has been confirmed.

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The Prediction and Verification of an Urban Air Quality Model for Ozone Forecasting over the Sydney Basin

  • Speer, Milton S.;Leslie, Lance M.
    • Proceedings of the Korean Environmental Sciences Society Conference
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    • 2003.11a
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    • pp.212-215
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    • 2003
  • The aim of this study was to test the air quality modelling system (HIRES-AIRCHEM) of The University of New South Wales particularly with regard to forecast ozone distribution. This was achieved by assimilating the New South Wales State EPA emissions inventory consisting of road and non-road sources and running the system over the Sydney metropolitan area for the four day period 25-28 February 1998. During this period ozone readings exceeded the EPA's goal of 80ppb on several occasions. The model forecasts of ozone distribution verified well with the EPA's ozone readings. This result has important implications for possible future use of the system as a tool for routinely assessing air quality.

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A Study on the Automation of the $N_2$ Splash Slag Coating System ($N_2$ Splash Slag Coating 시스템 자동화 연구)

  • Jang, Pill-Jang;Lee, Kee-Seong;Shin, Dong-Cheol;Cho, Hyun-Chul
    • Proceedings of the KIEE Conference
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    • 2002.11c
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    • pp.92-95
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    • 2002
  • A study on the system automation for the nitrogen splash slag coating in Basic Oxygen Blowing Furnace (BOF) is described. The engineers are trying to do their best efforts to increase the life of converter lining by developing improved refractory material and optimal operation techniques in the steel plants, A new slag coating method is needed to reduce the erosion rates of the refractory. In the current slag costing method, the BOF was swung back and forth. The new method uses the oxygen lance to blow the residual slag to the walls and cone of the converter. The nitrogen gas is used for blowing. This method is developed based on the automation process at factory in POSCO dated on the May 1998. The test results of nitrogen splash slag coating system for the BOF at POSCO are show to show the effectiveness of the system.

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Redescription of the Korean sandlance Hypoptychus dybowskii from Korea

  • Kwun, Hyuck Joon;Yim, Mi-Jin
    • Fisheries and Aquatic Sciences
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    • v.21 no.9
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    • pp.20.1-20.3
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    • 2018
  • Hypoptychus dybowskii, the Korean sandlance, is widespread in cold areas of the North Pacific. Although H. dybowskii has been considered to occur on the coast of Hamgyeongnam-do in Korea, the species is also distributed along the coast of Goseong-gun, Gangwon-do, south of Hamgyeongnam-do in the eastern part of the Korean Peninsula on the basis of newly collected specimens. In addition, many Koreans confuse H. dybowskii and Ammodytes japonicus (= A. personatus for Korean specimens) because the Korean common name or dialect of both species is "Yang-mi-ri", yet the two species differ in their external morphology. Hypoptychus dybowskii differs from A. japonicus in the location of the origin of the dorsal fin and the number of dorsal and anal fin rays.

진주만과 인근해역의 동물성 부유생물의 군집구조

  • 마채우;천원석;김종춘;양윤선
    • Proceedings of the Korean Society of Fisheries Technology Conference
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    • 2000.05a
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    • pp.414-415
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    • 2000
  • 남해안의 중부에 위치한 삼천포 근해의 진주만과 자란만 등은 경남 사천군, 남해군 및 고성군에 접해있으며, 만 주변에는 여러 개의 섬이 산재해 있는 반폐쇄적인 만이다. 진주만의 안쪽에는 사천만이 위치해 있으며, 윗쪽은 남강의 하류 지역이다. 일반적으로 동물성 부유생물은 식물성 부유생물에 의해 합성된 유기에너지를 어류와 같은 더 높은 영양 단계로 전달하는 일차 소비자의 역할을 담당하며, 동물성 부유생물의 분포는 다양한 해양 생태 환경에 영향을 받는다. 동물성 부유생물은 피식과 종간 경쟁같은 생물적인 요인(Parsons et al., 1984)뿐만 아니라, 유영 능력이 미약하기 때문에 수온, 염분같은 물리적인 특성에 의해서도 영향을 받는다(Barlow, 1955; Lance, 1963). (중략)

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First Record of Desmoscolex Nematoda (Desmoscolecida: Desmoscolecidae) from Korea

  • Lim, Hyung-Wook;Chang, Cheon-Young
    • Animal cells and systems
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    • v.10 no.4
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    • pp.219-225
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    • 2006
  • As a result of the faunistic survey of the free-living marine nematodes from coastal algal beds and sublittoral sands in South Korea, we report a meiobenthic species, Desmoscolex cosmopolites Timm, 1970, for the first time from the western Pacific as well as Korean waters. Among 17-ring Desmoscolex species, D. cosmopolites is represented by the following combination of characters: absence of subventral setae on 10th and 14th main rings and the presence of subdorsal setae with large angular lance-shaped tip. A detailed morphological redescription is provided using a scanning electron microscope and a differential interference contrast microscope. Character comparison between D. cosmopolites and its allied congeneric species is also analysed.

Loads and motions for a spar-supported floating offshore wind turbine

  • Sultania, Abhinav;Manuel, Lance
    • Wind and Structures
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    • v.22 no.5
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    • pp.525-541
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    • 2016
  • An offshore wind turbine supported by a spar buoy floating platform is the subject of this study on tower and rotor extreme loads. The platform, with a 120-meter draft and assumed to be sited in 320 meters of water, supports a 5 MW wind turbine. A baseline model for this turbine developed at the National Renewable Energy Laboratory (NREL) is employed in stochastic response simulations. The support platform, along with the mooring system consisting of three catenary lines, chosen for loads modeling, is based on the "Hywind" floating wind turbine concept. Our interest lies in gaining an understanding of the dynamic coupling between the support platform motion and the turbine loads. We first investigate short-term response statistics using stochastic simulation for a range of different environmental wind and wave conditions. From this study, we identify a few "controlling" environmental conditions for which long-term turbine load statistics and probability distributions are established.

Changes of Components in Salt-fermented Northern Sand Lance, Ammodytes personatus Sauce during Fermentation (숙성기간에 따른 까나리액젓의 성분변화)

  • CHO Young Je;IM Yeong Sun;LEE Keun Woo;KIM Geon Bae;CHOI Yeung Joon
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.32 no.6
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    • pp.693-698
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    • 1999
  • To investigate changes of components in salt-fermented northern sand lance, Ammodytes personatus sauce during fermentation, various chemical properties were examined at 1$\~$3 months intervals during 18 months fermentation. The moisture content decreased slightly, but the content of VBN and crude protein, total nitrogen, amino nitrogen, degree of hydrolysis, and absorbance at 453 nm increased gradually during fermentation. On the other hand, ash content, pH, and salinity showed almost no change. The contents of total nitrogen, amino nitrogen, and degree of hydrolysis increased sharply until 6$\~$8 months fermentation and showed the gentle increment after that, The Hx and uric acid were the most abundant in ATP related compounds, ranging from $83.1\%$ to $92.9\%$, After 18 month of fermentation, sauce was rich in free amino acids, such as glutamic acid, alanine, Iysine, leucine, isoleucine, valine, aspartic acid in that order.

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