• 제목/요약/키워드: susceptibility

검색결과 3,988건 처리시간 0.027초

정규화된 PWSCC 민감도 지수를 이용한 Alloy 600 기기 검사 우선순위 선정 (Alloy 600 Components Inspection Prioritization Using the Normalized PWSCC Susceptibility Index)

  • 김태룡;김형준
    • 한국압력기기공학회 논문집
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    • 제12권1호
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    • pp.17-22
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    • 2016
  • Alloy 600 widely used in nuclear power plant is susceptible to primary water stress corrosion cracking (PWSCC). It is important to prioritize the inspection of Alloy 600 components using PWSCC susceptibility index. Plant-specific model for the susceptibility index was reviewed. The normalized PWSCC susceptibility index to a reference value is suggested and applied. The result was found to be reasonable.

DETECTING LANDSLIDE LOCATION USING KOMSAT 1AND IT'S USING LANDSLIDE-SUSCEPTIBILITY MAPPING

  • Lee, Sa-Ro;Lee, Moung-Jin
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume II
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    • pp.840-843
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    • 2006
  • The aim of this study was to detect landslide using satellite image and apply the landslide to probabilistic landslide-susceptibility mapping at Gangneung area, Korea using a Geographic Information System (GIS). Landslide locations were identified by change detection technique of KOMSAT-1 (Korea Multipurpose Satellite) EOC (Electro Optical Camera) images and checked in field. For landslide-susceptibility mapping, maps of the topography, geology, soil, forest, lineaments, and land cover were constructed from the spatial data sets. Then, the sixteen factors that influence landslide occurrence were extracted from the database. Using the factors and detected landslide, the relationships were calculated using frequency ratio, one of the probabilistic model. Then, landslide-susceptibility map was drawn using the frequency ration and finally, the map was verified by comparing with existing landslide locations. As the verification result, the prediction accuracy showed 86.76%. The landslide-susceptibility map can be used to reduce hazards associated with landslides and to land cover planning.

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일본 동상성판정기준을 적용한 시료의 동상예측 및 동상성 평가 (Evaluation of Frost Heave Prediction and Frost Susceptibility in Sample using JGS Test Method)

  • 김영진;홍승서
    • 한국지반공학회:학술대회논문집
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    • 한국지반공학회 2008년도 춘계 학술발표회 초청강연 및 논문집
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    • pp.926-931
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    • 2008
  • This paper show two different standardized test methods(Japanese Geotechnical Society; JGS 2003). One test is a "Test Method for Frost Heave Prediction Test, JGS 0171-2003", and the other test is a "Test Method for Frost Susceptibility, JGS 0172-2003". The purpose of this test is to obtain the freezing rate(freezing speed), frost heave ratio(heave to sample height), frost heave rate(heaving speed), and other parameters to be used for frost heave prediction and determine the frost susceptibility by freezing test with water intake. This method shall be used to predict the frost heave in frozen ground and evaluate the frost susceptibility of natural and replacement materials.

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Ni기 초내열합금 용접부의 고온균열에 관한 연구(I) - 용접금속의 응고균열 감수성에 미치는 Fe의 영향 - (A Study on Hot Cracking in Ni-Base Superalloy Welds (I) - Effect of Fe Contents on Solidification Cracking Susceptibility in Weld Metal -)

  • 우인수;강정윤
    • Journal of Welding and Joining
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    • 제19권6호
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    • pp.614-621
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    • 2001
  • A study was carried out to determine the solidification cracking susceptibility of Ni-base superalloy as a function of Fe content in base metal. Three kinds of Ni-base superalloys with three different levels of Fe content were used. The solidification cracking susceptibility was evaluated by the Trans-Varestraint test at four different strain levels. Quantitative analysis of crack revealed that the solidification crack length and the temperature range in which hot cracking occurred in fusion zone (Brittle Temperature Range, BTR) decreased with a decrease in Fe content. Further, the thermo-calc data indicated that the solidification temperature range also decreased with decreasing Fe content. From these results, it was deduced that the improvement of the solidification cracking susceptibility with decreasing Fe content was attributed to the decrease of the solidification temperature range.

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유우의 임상형 유방염 원인균과 항생제 감수성의 변화양상 (Patterns of mastitic pathogens and antibiotic susceptibility of bovine clinical mastitis)

  • 김두
    • 대한수의학회지
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    • 제28권2호
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    • pp.397-404
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    • 1988
  • A total of 593 mastitic pathogens were isolated from the clinical mastitic milk of dairy cattle in Gyeonggi area from March 1984 to February 1988. The mastitic pathogens were further studied bacteriologically and examined for susceptibility patterns to 10 antibiotics. The results obtained were summerized as follows: 1. One hundred and seventy three pathogens were isolated in the first year of studies, 205 pathogens in the second year, 122 pathogens in the third year and 93 pathogens in the last year. 2. The pathogens isolated from clinical mastitis were more in summer than other seasons. 3. Staphylococcus spp (50%) and Streptococcus spp (18%) were the main pathogens in the first year of studies but coliforms (15%) and other bacteria (40%) were the main pathogens in the last year of studies. 4. Coliform mastitis was occurred only in summer and autumn. 5. Antibiotic susceptibility patterns of the same genuses from clinical mastitis infections in different herds and in different years varied greatly. Therefore, treatment should be selected on the basis of susceptibility test results.

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Update of genetic susceptibility in patients with Kawasaki disease

  • Yoon, Kyung Lim
    • Clinical and Experimental Pediatrics
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    • 제58권3호
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    • pp.84-88
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    • 2015
  • Kawasaki disease (KD) is an acute systemic vasculitis that predominantly affects children, and can result in coronary artery lesions (CAL). A patient with KD who is resistant to treatment with intravenous immunoglobulin (IVIG) has a higher risk of developing CAL. Incomplete KD has increased in prevalence in recent years, and is another risk factor for the development of CAL. Although the pathogenesis of KD remains unclear, there has been increasing evidence for the role of genetic susceptibility to the disease since it was discovered in 1967. We retrospectively reviewed previous genetic research for known susceptibility genes in the pathogenesis of KD, IVIG resistance, and the development of CAL. This review revealed numerous potential susceptibility genes including genetic polymorphisms of ITPKC, CASP3, the transforming growth factor-${\beta}$ signaling pathway, B lymphoid tyrosine kinase, FCGR2A, KCNN2, and other genes, an imbalance of Th17/Treg, and a range of suggested future treatment options. The results of genetic research may improve our understanding of the pathogenesis of KD, and aid in the discovery of new treatment modalities for high-risk patients with KD.

인공신경망을 이용한 산사태 취약성 분석 (Landslide Susceptibility Analysis Using Artificial Neural Networks)

  • 이사로;류주형;민경덕;원중선
    • 자원환경지질
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    • 제33권4호
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    • pp.333-340
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    • 2000
  • The purpose of this study is to develop landslide susceptibility analysis techniques using artificial neural network and apply the newly developed techniques for assessment of landslide susceptibility to study areas, Yongin. Landslide locations detected from interpretation of aerial photo and field survey, and topographic, soil and geological maps of the Yongin area were collected. The data of the locations of land-slide, slope, soil texture, topography and lithology were constructed into spatial database using GIS. Using the factors, landslide susceptibility was analyzed by artificial neural network methods. The results of the analysis were verified using the landslide location data. The validation results showed satisfactory agreement between the susceptibility map and landslide location data.

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SSFPI 기법을 이용한 MR 뇌기능 영상 -고 속의 자화율 효과의 직접적인 측정 (SSFP Interferometry (SSFPI) Technique Applied to functional MRI - A Fast and Direct Measurement of Magnetic Susceptibility Effect)

  • 정준영
    • 대한의용생체공학회:의공학회지
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    • 제17권4호
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    • pp.525-534
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    • 1996
  • We have developed a fast steady state free precession interferometry (SSFPI) technique which is useful for the fMRl (functional Magnetic Resonance Imaging). As is known, SSFP sequence with a suitable adjustment of Vadient (readeut) allows us to measure precession angle 6 which in tw relates to the field inhomogeneity. Combining the two pulses (known as FID and Echo) in FADE (Fast Acquisition Double Echo) sequence, for example, one can obtain the interference term which is directly related to the precession angle It has been known that a fast high resolution magnetic field mapping is possible by use of the modified FADE sequence or SSFPI, and we have attempted to use the SSFPI technique for the susceptibility-induced fMRl. When the method is applied to the susceptibility effect based functional magnetic resonance imaging (fMRl), it was found that the direct susceptibility effect measurement was possible without perturbations such as the backgrounds and inflow effect. In this paper, simulation results and experimental results obtained with 2.0 Tesla MRI system are presented.

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폐타이어분말 혼합이 동상억제에 미치는 영향에 관한 실험적 연구 (An experimental study for reducing frost susceptibility using granulated used-tire)

  • 김학삼
    • 한국산업융합학회 논문집
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    • 제9권2호
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    • pp.147-154
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    • 2006
  • The authors conducted field experiments of frost heave to evaluate a method for reducing frost susceptibility using granulated used-tire mixture for 3 winters. Qualitative analyses for the evaluation of restraint effect of frost susceptibility by utilizing granulated used-tire soil mixture were conducted with the segregation potential concept and frost heave ratio. By mixing soil with granulated tire, the frost susceptibility was decreased drastically. From the result of the analyses, it was confirmed that granulated tire is an excellent material in controlling the frost susceptibility.

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인공해수의 pH에 따른 강 용접부의 응력 부식균열거동에 관한 연구 (A Study on the Stress Corrosion Cracking Behaviors for Weld Joint of Steel with Various pH Values in Synthetic Sea Water)

  • 유효선;나의균;정세희
    • Journal of Welding and Joining
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    • 제13권1호
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    • pp.78-88
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    • 1995
  • This paper was performed to study the utility of the SP(small punch) test and the AE(acoustic emission) test in the evaluation of SCC(stress corrosion cracking) susceptibility for parent metal and bond line of HT80 steel-weld joint by SAW(submerged arc welding) with the various pH values. The loading rate used was 3*10$^{-4}$ mm/min and the corrosive environment used was synthetic sea water during the SP test and the AE test. According to the test results, the SCC susceptibility of the parent metal was increased in the order of pH6.0, pH8.2 and pH10.0. On the other hand, the bond line showed almost the same high SCC susceptibility in all pH concentrations. Synthetically, from the results of the SCC susceptibility, the macro- and micro-SEM observation, the microfracture behaviors by AE test and the relationship between SCC susceptibility and displacement at incipient failure, .delta.$_{i.f-AE}$, it can be concluded that the SP test and the AE test are the good test methods to evaluate the SCC susceptibility for parent metal and bond line of the weld joint with the change of environmental factors.

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