• Journal of Welding and Joining
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• 제22권4호
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• pp.59-64
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• 2004

The purpose of this study is to investigate the influence of weld bead profiles on stress concentration factors of double V groove butt-welded joints. The influence of three parameters such as toe radii, flank angles and bead heights on the stress concentration factors is studied by finite element analysis. It is shown that the three parameters have similar effects on the stress concentration factors. Finally a formula to estimate the stress concentration factors considering the three parameters and others is proposed and estimated results are compared with the results obtained by finite element analysis.

• 상하수도학회지
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• 제23권6호
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• pp.703-709
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• 2009

In this study, an artificial-waterway experiment was conducted, using an attachment plate, on which algae from Nanakita river was placed, to examine the influence exerted by the variation of the dissolved-silicon concentration on the river periphyton. As a result, the variation of the dissolved-silicon concentration was found to exert an influence on the density of the adhesion diatom, and the mole ratio limits of the silica were about $Si/P{\fallingdotseq}182$ and $Si/N{\fallingdotseq}16.4$ or less. Moreover, the mole ratio that is necessary for proliferation was found to be larger than the value of the oceanic algae. Senedesmus sp. and Ankistrodesmus sp., which used silica in adhesion chlorophyta, received the influence of the silicon concentration strongly, and the twowere found to be superior in the environment, making silica a restriction factor.

• 한국조리학회지
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• 제23권1호
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• pp.48-57
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• 2017

With the increasing popularity of mobile commerce, restaurant service has become one of the leading service categories. Thus, this study attempted to understand the shopping behavior of restaurant mobile consumers by focusing on their shopping orientations. Specifically, this study investigated the structural relationships among shopping orientations, perceived value, concentration, and purchase intention in restaurant mobile commerce. Data analysis employing a structural equation approach was carried out for this study. Results revealed that, first, a consumer's shopping orientations was found to have a positive influence on perceived value, with time/convenience orientation possessing a stronger influence on perceived value than other factors (economic and hedonic). Second, a consumer's perceived value was found to affect concentration and purchase intention. Third, a consumer's concentration also appeared to influence purchase intention.

• 한국수자원학회논문집
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• 제30권6호
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• pp.649-659
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• 1997

The influence of polluted water discharged from the Saemankeum Lake is predicted by using two-dimensional finite element model. The simulation results show that influence of the Polluted water to the northern part of the Kckunsan Islands is small during flood time. The reason is because lock gates are located in the south of the Kokunsan Islands so that tidal current directing north is blocked by these Islands. However, during the ebb time, the influence of the polluted water is extended to the whole southern part of the Kokunsan Islands. When the amount of ten percent of the total volume of polluted water is discharged from the Saemankeum Lake, equi-concentration contour line of one tenth of initial discharge concentration includes the inner area surrounded by Sinsi Island, Munyeo Island, Bian Island, and Daehang-Li. In general, peak concentration near the lock gates is found out to be higher during the spring tide than the neap tide.

• 대한의용생체공학회:의공학회지
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• 제22권6호
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• pp.497-502
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• 2001

혈액 속의 글루코즈 농도를 측정 시 타 성분이 미치는 영향을 분석하였다. 이를 위하여 헤모글로빈을 포함한 총 5 가지의 주요 성분을 이용하여 혈액 팬텀을 만들었으며 글루코즈의 배음대역을 포함하는 1500 ~ 1850nm의 흡수스펙트럼을 측정하여 농도 추정 모델을 세웠다. 농도 예측은 다변량통계분석 모델인 부분최소자승회귀분석을 이용하였다 다른 성분들이 글루코즈 측정에 있어 미치는 영향은 실험계획법을 적용한 인자 분석에 의하여 조사하였다. 트리 글라이세라이드는 영향을 미치지 않는 것으로 나타났으며. 알부민과 글로불린의 경우 적은 범위의 영향을 주는 것으로 나타났다 하지만 헤모글로빈의 영향은 큰 것으로 나타나 글루코즈 측정에 있어 헤모글로빈의 농도 보상이 필요한 것으로 판명되었다.

• 한국대기환경학회지
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• 제7권2호
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• pp.105-113
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• 1991

An investigation is carried out for the role of topography in governign the mesoscale distribution of $SO_2$ concentration in Seoul. The three dimensional wind fields computed for a given synoptic meteorological condition by an atmospheric mesoscale model in the terrain following coordinate have been employed to compute the three dimensional mesoscale distributions of $SO_2$ concentration by the diffusion model in Seoul area. Terrain may affect the mesoscale distributions of $SO_2$ concentration through its influence on the mesoscale wind fields. This study discusses only the terrain effect on the concentration through its modification of the wind. This effect is to produce higher concentration in lower area according to the structure of divergence fields derived from and atmospheric mesoscale model.

• International Journal of Oral Biology
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• 제40권4호
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• pp.183-187
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• 2015

The present study was aimed to evaluate the influence of glutaraldehyde (GA) concentration on multiple electron microscopic (EM) immunostaining using pre-embedding peroxidase and post-embedding immunogold method. Influence of various concentrations of GA included in the fixative on immuoreactivity was assessed in the multiple immunostaining using antisera against anti-transient receptor potential vanilloid 1 (TRPV1) for peroxidase staining and anti-GABA for immunogold labeling in the rat trigeminal caudal nucleus. Anti-TRPV1 antiserum had specificity in pre-embedding peroxidase staining when tissues were fixed with fixative containing paraformaldehyde (PFA) alone. Immunoreactivity for TRPV1 was specific in tissues fixed with fixative containing 0.5% GA at both perfusion and postfixation steps, though the immunoreactivity was weaker than in tissues fixed with fixative containing PFA alone. Tissues fixed with fixative containing 0.5% GA at the perfusion and postfixation steps showed specific immunogold staining for GABA. The results of the present study indicate that GA concentration is critical for immunoreactivity to antigens such as TRPV1 and GABA. This study also suggests that the appropriate GA concentration is 0.5% for multiple immunostaining with peroxidase labeling for TRPV1 and immunogold labeling for GABA.

• 유기물자원화
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• 제10권4호
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• pp.103-111
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• 2002

본 연구는 음식물쓰레기 내에 포함되어진 염분이 음식물쓰레기의 자원화공정 및 최종제품의 사용단계에 있어서 영향의 우려가 있는 점을 감안하여 음식물쓰레기의 자원화공정 및 사용단계에서 염분의 식물에 대한 영향을 정밀검토하기 위하여 수행되었다. 염분의 농도가 퇴비화 반응에 미치는 영향을 퇴비화온도, 이산화탄소 발생량, pH에 의하여 비교 검토한 결과, 염분의 농도가 습량기준 1%까지는 영향이 적었으며. 2, 3%에서 영향이 나타나기 시작하여 6%에서는 크게 나타났다. 염분함량이 퇴비화에 미치는 영향을 고려했을 때 3%까지는 그다지 크지 않아 무관하다고 할 수 있으나 염분함량이 3%이상에서는 유기물 분해효율을 저하시키는 요인으로 작용함을 알 수 있었다. 염분의 영향을 최소화하기 위해서는 염분의 농도를 습량기준으로 1%이하에서 운전하는 것이 타당한 것으로 확인되었으며, 실제 현장에서는 유입되는 음식물쓰레기가 습량기준이 1%이하인 것을 감안할 때 퇴비화반응에는 크게 영향을 미치지 않는 것이 확인되었다. 염분의 농도가 식물의 생육에 미치는 영향을 검토하기 위하여 실제 자원화시설인 A시, S시, S구, K구에서 시료를 채집하여 인위적으로 염분의 농도를 0.5%, 0.8%, 1.2%, 1.6%, 2%, 2.5%. 3%로 조절하여, 실험실에서 반응에 미치는 영향을 검토하면서 생성된 퇴비를 이용하여 유식물 실험과 Pot실험을 수행하여 검토한 결과, 퇴비에 따라서는 3%까지 식물의 성장에 미치는 영향이 적었으며, 3%이상에서 영향이 확연하게 관찰되었다. 3%이내에서 식물에 대한 영향이 나타나 것은 퇴비가 미부숙되어 유기물에 의한 영향이 큰 것으로 판단되었다.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2000년도 학술발표회 발표논문집
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• pp.371-377
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• 2000

Environmental impact on a land reclamation project, Hwaong tidal barrier was studied using the dispersion and advection model to predict the influence of polluted water discharged from freshwater reservior. The simulation results show that the distribution of concentration by influence of polluted water discharged during a tidal cycle appeared to be extinguished at atmost all points after two tidal cycle. Peak concentration near the sluice gate is found out to be higher during the spring tide than neap tide. Equi-concentration contour line appeared to distributed a longer according to line of sea dike in spring tide than neap tide. The reasons is because influence by currents of northwest direction is a stronger, compared to spring tide and neap tide in the flood tide.

• 환경위생공학
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• 제24권3호
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• pp.37-54
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• 2009

The study has analyzed impacts and intensity of weather that affect $PM_{10}$ concentration based on PM10 forecast conducted by the city of Seoul in order to identify ways to improve the accuracy of PM10 forecast. Variables that influence $PM_{10}$ concentration include not only velocity and direction of the wind and rainfalls, but also those including secondary particulate matter, which were identified to greatly influence the concentration in complicated manner as well. In addition, same variables were found to have different impacts depending on seasons and conditions of other variables. The study found out that improving accuracy of $PM_{10}$ concentration forecast face some limits as it is greatly influenced by the weather. As an estimation, this study assumed that basic research units and artificially estimated pollutant emissions, study on mechanisms of secondary particulate matter productions, observatory compliment, and enhanced forecaster's expertise are needed for better forecast.