• 제목/요약/키워드: Site Compatibility

검색결과 55건 처리시간 0.027초

남서중국의 자생페스큐의 엔도파이트와 톨체스큐 품종과의 공생 (Endophytes from Natural Festuca spp. in Southwest China and Their Compatibility with Tall Fescue Cultivars)

  • 왕야오야오;두용지;한리바우;리다이엥
    • 아시안잔디학회지
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    • 제23권1호
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    • pp.163-176
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    • 2009
  • 자생화본과 식물에서 자연적으로 생기는 엔도파이트 분포의 연구는 엔도파이트 공생에 대한 이해와 재배식물에서의 엔도파이트의 잇점에 대하여 중요하다. 본 연구는 중국 유난, 구이죠우, 시촨지역에서 자생하는 페스큐로부터 엔도파이트를 조사하고, 그 지역에서 널리 식재되는 잔디형 페스큐와의 융화에 대하여 연구하는데 목표를 두었다. 현장의 현미경 관찰 결과628개체의 sheep fescue 중 421개체가 엽초조직에서 엔도파이트가 동정되었다. 페스큐종에서 3개는 종자에서, 90개의 엔도파이트 분리체가 수집된 종자의 유묘에서 수집되었다. sheep fescue와 stapfii 페스큐의 엔도파이트는 Neotyphodium typhinum와 Neotyphodium starii로 각각 동정되었다. Little Hero, Sub Boy, Eldorado, Arid III, Millennium, Crossfire, 그리고 Fawn 톨페스큐 7품종에서 위 2종의 균류의 융화성을 조사한 결과, N. typhinum 나 N. typhinum and N. starii는 'Sun Boy'와 'Eldorado'에서 가장 높은 접종율을 보였다. 톨페스큐 품종과 엔도파이트 타입과의 접종에서 매우 높은 유의성의 교호 효과를 보였다.

전흉부 재건을 위한 국소 피판술의 선택 (Local Flap Algorithm for the Reconstruction of Anterior Chest Wall Defects)

  • 김지훈;김의식;황재하;김광석;이삼용
    • Archives of Plastic Surgery
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    • 제36권4호
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    • pp.397-405
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    • 2009
  • Purpose: Soft tissue defect of anterior chest wall is caused by trauma, infection, tumors and irradiation. To reconstruct damaged anterior chest wall does require to consider the patient's body condition, the cause, the location, the depth and the size of deletion, the circulation of surrounding tissue and minimization of functional and cosmetic disability. In this report, we suggest the algorithm of configuration for reconstruction methods. Methods: A retrospective study of 20 patients who underwent anterior chest wall reconstruction with pedicled musculocutaneous flap and fasciocutaneous flap was conducted. We collected the information of the patient's body condition, the cause, the size, the depth and the location of deletion, implemented flap and complication. We observed and evaluated flap compatibility, functional and cosmetic results. Patients completed survey about the extent to their satisfaction. Result: Follow up period after surgery was from 6 to 26 months, survival of flap were confirmed in all of patients' case. Two cases of local necrosis, one case of wound disruption were reported, but all these were cured by the debridement and primary closure. One hematoma and one seroma formation were observed in donor site. Longer surgery time, more bleeding amount and more transfusion volume were reported in the group of musculocutenous flap. Conclusion: Long term follow up result showed the successful reconstruction in all patients without recurrence and with minimal donor site morbidity. In addition, the patients' satisfaction for cosmetic and functional results were scaled relatively higher. This confirmed the importance of reconstruction algorithm for the chest wall reconstruction.

접촉점화성 추진제 안전기준 및 상호반응성 분석 (Analysis of Safety Regulation and Chemical Reactivity of Hypergolic Propellant)

  • 이응우;신안태;조상연;박병문
    • 한국가스학회지
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    • 제27권3호
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    • pp.108-115
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    • 2023
  • 하이드라진은 우수한 액체추진제이지만 독성과 반응성이 높아 저장 및 취급 시 주의가 요구된다. 발사장 안전을 확보하기 위해서는 화학물질의 누출로 인한 상호반응성을 고려한 안전지침을 수립하여야 한다. 본 연구에서는 해외 발사장의 하이드라진 충전시설 현황에 대해서 조사하고 저장 및 취급과 관련된 안전기준을 검토하였으며, 발사장에서 주로 취급되는 화학물질과 위험물안전관리법상 유별 혼재기준에 따라 혼합 보관이 가능한 물질을 선정하여 하이드라진과의 상호반응성을 분석하였다. 분석 결과 발사장에서 취급되는 화학물질에는 연료유를 제외하고는 상호반응성이 있는 것으로 분석되었으며 혼재가 가능한 위험물과도 상호반응성이 있는 것으로 나타났다. 그렇기 때문에 발사장에 하이드라진 전용의 저장소 구축이 필요함을 강조하며, 충전작업 중에는 저장용기와 처리 장비에 사용되는 물질과의 상호반응성을 피하기 위한 세심한 관리의 중요성을 강조한다. 이러한 분석 결과를 바탕으로 발사장에서 하이드라진 저장 보관 및 취급 시 발사장 안전을 확보하기 위한 기초자료로 활용할 예정이다.

지오그리드를 활용한 인천국제공항 활주로 보강사례 (Case Study of Geogrid Reinforcement in Runway of Inchon International Airport)

  • 신은철;오영인;이규진
    • 한국지반공학회:학술대회논문집
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    • 한국지반공학회 1999년도 토목섬유 학술발표회 논문집
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    • pp.105-116
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    • 1999
  • The Inchon International Airport site was formed by reclaimed soil from the sea. The average thickness of soft soil Is about 5 m and most of soft soils are normally consolidated or slightly over consolidated. There are many box culverts which are being constructed under the runways in the airfield. Sometimes, differential settlement can be occurred in the adjacent of box culvert or underground structures at the top layer of runway Soil compaction at very near to the structure is not easy all the time. Thus, one layer of geogrid was placed at the bottom of lean concrete layer for the concrete paved runway and at the middle of cement stabilized sub-base course layer for the asphalt paved runway. The length of geogrid reinforcement is 5m from the end of box culvert for both sides. The extended length of geogrid was 2m from the end of backfill soil in the box culvert. The tensile strength tests of geogrid were conducted for make sure the chemical compatibility with cement treated sub-base material. The location of geogrid placement for the concrete paved runway was evaluated. The construction damage to the geogrid could be occurred. Because the cement treated sub-base layer or lean concrete was spread by the finisher. The magnitude of tensile strength reduction was 1.16%~1.90% due to the construction damage and the ultimate tensile strength is maintained with the specification required. Total area of geogrid placement in this project is about 50,000 $m^2$.

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고속도로 현장별 비점오염 저감시설 선정방안 연구 (A Study for selecting the Highway Sites' Best Management Practice for Nonpoint Source Pollution)

  • 이용복;최상일;박계수;성일종;정선국
    • 환경영향평가
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    • 제20권6호
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    • pp.857-866
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    • 2011
  • This research categorized EIA target highways into following three types in order to minimize non-point source pollution from highway runoff. 1. Big drainage basin. 2. Small drainage basin. 3. Bridge section. The Natural, Filter and Swirl-Type devices were evaluated in terms of removal efficiency of TSS, BOD, COD, T-N, T-P, compatibility of site selection, economic feasibility, and maintenance convenience through which the final BMP was selected. According to the removal efficiency result, the area of Big and Small Drainage basin and bridge section had higher removal efficiency with natural facility than that of the Filter or Swirl-Type device. To make appropriate selection of highways'BMP for non-point source pollution, this study will aim to contribute to building more environmentally friendly highways by proposing the selection process that is made of 5 stages. 1. Selecting the target drainage basin. 2. Selecting the land for the mitigation facility. 3. Analysing the ease of maintenance. 4. Technically evaluating each installation. 5. Evaluating the effective implementation methods.

CFRP 적층판으로 보강된 철근콘크리트보의 신뢰성평가 (Reliability Assessment of Reinforced Concrete Beams Strengthened by CFRP Laminates)

  • 조효남;최영민
    • 한국전산구조공학회:학술대회논문집
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    • 한국전산구조공학회 1994년도 가을 학술발표회 논문집
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    • pp.160-166
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    • 1994
  • In general, the problems of strengthening and repairing of deteriorated or damaged reinforced concrete members are usually worked out in situ by externally bounding steel plates using epoxy resins, which has been recognized to be one of effective and convenient methods. But the disadvantages of strengthening/repairing concrete members with externally bonded steel plates include ; (a) deterioration of the bond at the steel-concrete interface caused by the corrosion of steel ; (b) difficulty in manipulating the plate at the construction site ; (c) improper formation of joints, due to the limited delivery lengths of the steel plates ; and etc. Therefore these difficulties eventually have led to the concept of replacing the steel plates by fiber-reinforced composite sheets which are characterized by their light weight, extremely high stiffness, excellent fatigue properties, and outstanding corrosion resistance. In the paper, for the reliability assessment of reinforced concrete beams externally strengthened by carbon fiber plastic(CFRP) laminates, an attempt is made to suggest a limit state model based on the strain compatibility method and the concept of fracture mechanics. And the reliability of the proposed models is evaluated by using the AFOSM method. The load carrying capacity of the deteriorated and/or damaged RC beams is considerably increased. Thus, it may be stated that the post-strengthening of concrete beams with externally bonded CFRP materials may be one of very effective way of increasing the load carrying capacity and stiffeness characteristics of existing structures.

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중.저온형 고체 산화물 연료전지의 공기극으로 사용되는 PSCF3737 물질의 특성에 관한 연구 (Characterization of PSCF3737 for intermediate temperature solid oxide fuel cell (IT-SOFC))

  • 박광진;배중면
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2008년도 춘계학술대회 논문집
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    • pp.61-64
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    • 2008
  • $Pr_{0.3}Sr_{0.7}Co_{0.3}Fe_{0.7}O_{3-\delta}$ (PSCF3737) was prepared and characterized as a cathode material for intermediate temperature-operating solid oxide fuel cell (IT-SOFC). X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), extended X-ray absorption fine structure (EXAFS), and electrical property measurement were carried out to study cathode performance of the material. XPS and EXAFS results proved that oxygen vacancy concentration was decreased and lattice constants of the perovskite structure material were increased by doping Fe up to 70 mol% at B-site of the crystal structure, which also extended the distance between oxygen and neighbor atoms. Thermal expansion coefficient (TEC) of PSCF3737 is smaller than that of $Pr_{0.3}Sr_{0.7}CoO_{3-\delta}$(PSC37) due to lower oxygen vacancy concentration. PSCF3737 showed better cathode performance than PSC37. It might be due good adhesion by a smaller difference of TEC between $Gd_{0.1}Ce_{0.9}O_2$ (CGO91) and electrode. Composite material PSCF3737-CGO91 showed better compatibility of TEC than PSCF3737. However, PSCF3737-CGO91 did not represent higher electrochemical property than PSCF3737 due to decreased reaction sites by CGO91.

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소수성 양자점을 함유한 Poly-L-Lactic Acid film의 제조 및 세포흡수 연구 (Preparation and Cellular Uptake of Hydrophobic Quantum Dots Encapsulated in Poly-L-Lactic Acid Film)

  • 이지숙;우경자;정혜선
    • Journal of Pharmaceutical Investigation
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    • 제39권1호
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    • pp.1-6
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    • 2009
  • To overcome the stability problem of hydrophilic quantum dot (Q-dot), cellular uptake of hydrophobic instead of hydrophilic Q-dot was studied in the hope to find a simple method to use Q-dot as a cellular imaging probe. Hydrophobic Q-dot and poly-L-lactic acid (PLLA) were co-dissolved in chloroform to prepare stable films. Due to the cellular compatibility of PLLA, adherent cells were cultured on the film to observe the degree of Q-dot uptake and cytotoxicity of the prepared films. The results show that Q-dots were absorbed into NIH3T3 and EMT6 cells. Cellular uptake was also observed when hydrophobic Q-dots were coated directly on a glass plate. PLLA/Q-dot film and Q-dot coated on glass plate did not show major cytotoxicity. In vivo tumor model was also used to show the uptake of Q-dot from the PLLA/Q-dot film to the tumor site.

저속통제기 야시조명계통 개발 (Development of Night Vision Imaging System for the KO-1 Aircraft)

  • 권종광;김환우
    • 한국항공우주학회지
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    • 제34권5호
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    • pp.107-116
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    • 2006
  • 본 논문은 저속통제기 야시조명계통 개발에 관한 논문이다. 현대전에서는 야간특수작전수행과 조종사 임무 극대화를 위하여 야시조명계통을 항공기에 적용하는 추세이다. 국내 최초로 야시조명계통이 적용된 저속통제기는 적지에서 저고도로 비행하며 주/야간 적 지형 및 적군들의 이동 등에 관한 정보를 획득하는 전술통제기이다. 저속통제기 야시조명계통 개발을 통하여 국내 최초로 적용된 이 분야의 개발 요구도 설정, 개발규격 정립, 시스템 개발 및 시험평가체계 구축을 성공적으로 완수하여 적기에 군 사용가 판정을 획득하였다.

어린이 안전사고 예방교육 프로그램 개발 (Development of the Safety Education Program for Children)

  • 배정이
    • Child Health Nursing Research
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    • 제9권2호
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    • pp.162-172
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    • 2003
  • Purpose: The purpose of this study is to develop safety education program to prevent child accident and to improve the health of children by providing a safe environment. This program provide parents and children with information on how to prevent children from accident. Children especially can learn specific methods to avoid accident both at home, school and outside the home through safety education, which is based on problem solving. Method: This program was developed based on literature reviews, surveys and negotiation process. School aged children, parents, and teachers were interviewed to identify their educational needs based on their experiences related to child accident. During the 7th Annual Conference of Educational Courses in 1999, the Korean Educational Ministry examined the feasibility and compatibility of integrating the program into the current educational curriculum. Result: This program includes useful subjects such as safety education, preventive strategies, crisis management, guide for parent and teacher, resource persons, internet site and phone numbers of available hospital. Counseling is provided by researcher if needed. Conclusion: This program could be adequately utilized for prevention of child accident and creation of preventive strategies. It will also suggest an intervention strategy for injured children.

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