• 한국융합학회논문지
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• 제10권12호
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• pp.35-42
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• 2019

본 연구의 목적은 인식가치 차원의 계획행동에 대한 이론적 확대모형을 바탕으로 길림성 특산품 중 하나인 인삼제품에 대한 소비자의 구매의도에 미치는 영향요인을 실증 분석하고, 소비자들의 인삼제품 구매행태를 보다 정확하게 파악하는 것이다. 본 연구에서는 길림성 거주 인삼제품 소비자를 대상으로 설문 조사를 실시하였고, 유효 응답 360개의 샘플을 SPSS 23.0을 이용하여 통계적 분석을 수행하였다. 분석결과 행동 태도, 주관적 규범, 인지된 행동 통제, 가격 가치, 감정 가치, 사회적 가치가 인삼 제품을 사려는 소비자들의 의도에 상당한 영향을 미치는 것으로 나타났으며, 인지된 가치의 영향은 계획된 행동 이론의 세 가지 요인보다 현저하게 작은 것으로 나타났다. 또한 기능적 가치는 소비자들의 인삼제품 구매 의도에 큰 영향을 미치지 않는 것으로 분석 되었다.

• 한국융합학회논문지
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• 제10권12호
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• pp.101-108
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• 2019

가족여행은 관광시장에서 수요가 점차로 커지고 있고, 가족 간의 행복을 얻는 효과적인 방법이기도 하다. 본 논문은 가족여행객을 연구대상으로 가족 간의 애정교류행태와 체험 가치의 관계를 연결하여, 가족여행에서 "상호작용-사회적지지-체험가치"의 개념모형에 관련한 가설을 실증·분석하였다. 연구결과로는 가족애에 대한 상호작용은 가족관광객의 기능적, 인지적, 감정적 체험가치에 대해서 모두 긍정적이고 중요한 역할을 하는 것으로 나타났다. 사회적 지지는 기능적, 인지적, 감정적 등의 전반적인 체험가치에 대해서 모두 긍정적인 영향이 있는 것으로 나타났다. 본 연구는 상호작용 행동과 체험 가치의 관계에 대한 실증적 연구를 확대하였고, 여행의 본질적인 측면에서 가족 간의 상호작용 행동과 체험가치를 이해할 수 있는 근거를 제공하였다.

• 한국융합학회논문지
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• 제11권7호
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• pp.181-191
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• 2020

본 연구의 목적은 농촌 주민과 도시 주민 간의 정보 소비의 특성을 조사하고 평가하는 것이다. 본 연구에서는 중국 길림성에 위치한 15개 도시와 농촌 지역 거주자에 대해 121개의 정보소비 문항으로 구성된 설문과 심층 인터뷰를 통해 데이터를 수집했으며, 985개의 유효 응답을 SPSS 23.0을 이용하여 분석하였다. 도시와 농촌 거주자를 대상으로 연령별, 가구형태 및 성별에 따른 정보소비 특성을 분석한 결과, 연령과 성별, 연령과 가구형태, 가족형태와 성별 사이에 상호작용이 큰 것을 알 수 있었다. 본 연구는 도시와 시골 주민들 사이의 정보 서비스 격차를 줄이고 정보 소비의 잠재력을 활용하는 데 기여할 수 있다. 이번 연구는 중국 길림성 주민만을 대상으로 분석했다는 한계가 있으며 향후 조사 범위를 확대할 필요가 있다.

• 한국환경보건학회지
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• 제33권6호
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• pp.479-487
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• 2007

[ $PM_{2.5}$ ], particulate matter less than 2.5 um in a diameter, can penetrate deeply into the lungs. Exposure to $PM_{2.5}$ has been associated with increased hospital visits for respiratory aliments as well as increase mortality. $PM_{2.5}$ is a byproduct of combustion processes and as such has a complex composition including a variety of metallic elements, inorganic and organic compounds as well as biogenic materials (microorganisms, proteins, etc). In this study, the average concentrations of fine particulates $PM_{2.5}$ have been measured simultaneously in Asan and Seoul, Korea, by using particulate matter portable sampler from September 2001 to August 2002. Sample collection filters were analyzed by ICP-OES to determine the concentrations of metallic elements (As, Ni, Fe, Cr, Cd, Cu, Pb, Zn, Si). Annual mean $PM_{2.5}$ concentrations in Asan and Seoul were 37.70 and $45.83\;{\mu}g/m^3$, respectively. The highest concentrations of $PM_{2.5}$ were found in spring season in both cities and the concentrations of measured metallic elements except As in Asan were higher than those in Seoul, suggesting that yellow dust in spring could affect $PM_{2.5}$ concentrations in Asan rather than Seoul. The correlation coefficients of Pb and Zn were 0.343 for Asan and 0.813 for Seoul during non-yellow dust condition, suggesting that Pb and Zn were influenced with the same sources. The correlation coefficients between Si and Fe in the fine particulate mode were 0.999 (Asan) and 0.998 (Seoul) during yellow dust condition. It was suggested that these two elements were impacted by soil-related transport from China during the yellow dust storm condition.

• 대한기계학회논문집B
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• 제35권2호
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• pp.169-178
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• 2011

격자볼츠만 방법(LBM)을 이용하여 난류 경계층에서의 오염물질 확산에 대하여 수치계산을 수행 하였다. 난류 경계층 내의 유동을 모사하기 위하여 격자볼츠만 방법에 Smagorinsky 아격자 모델을 적용한 LB-SGS 모델을 사용하였으며, 오염물질의 확산을 모사하기 위하여 Passive-scalar 방법을 적용하였다. LB-SGS 모델의 신뢰성 검증을 위하여 Fackrell & Robins(1982)과 Raupach & Legg(1983)의 실험 조건과 동일한 조건하에서 수치계산을 수행하였고, 수치계산으로 얻어진 농도 분포를 실험값과 비교하였다. 이 결과로부터 LB-SGS 모델이 난류 경계층 내에서의 오염물질의 농도분포를 예측하는데 적합한 모델임을 알 수 있었다.

• Ocean and Polar Research
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• 제26권3호
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• pp.453-463
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• 2004

The Antarctic Peninsula is important in terms of global warming research due to pronounced increase of air temperature over the last century. The first eddy covariance system was established at King Sejong Station located in the northern region of the Antarctic Peninsula in December of 2002 and has been operated over one year. Here, we analyze turbulent characteristics to determine quality control criteria for turbulent sensible heat flux data as well as to diagnose the possibility of long term eddy covariance measurement under extreme weather conditions of the Antarctic Peninsula. We also report the preliminary result on sensible heat flux. Based on the analyses on turbulent characteristics such as integral turbulence characteristics of vertical velocity (w) and heat (T), stationarity test and investigation of correlation coefficient, they fallow the Monin-Obukhov similarity and eddy covariance flux data were reliable. ${\sim}47%$ of total retrieved sensible heat flux data could be used for further analysis. Daytime averaged sensible heat flux showed a pronounced seasonal variation, with a maximum of up to $300Wm^{-2}$ in summer. In conclusion, continuous and long-term eddy covariance measurement may be possible at the study site and the land surface may influence the atmosphere significantly through heat transport in summer.

• 한국의류산업학회지
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• 제17권6호
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• pp.1020-1029
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• 2015

This paper investigated the wearing performance of knitted fabrics made of air vortex yarns using PTT/tencel/cotton fibres in comparison with ring and compact yarns for emotional garment. Wicking property of knitted fabric made of MVS yarns was worse than those by ring and compact yarns, however, drying property of knitted fabric made of MVS yarns was better than those by ring and compact yarns, which was explained as more water vapor transport due to larger openness between fibres in the MVS yarns than those in the ring and compact yarns. Thermal conductivity of knitted fabric made of MVS was lower than those of ring and compact yarns and maximum heat flow(Q_max) at the transient state of MVS knitted fabric was lower than those of ring and compact yarns, which may be attributed to MVS yarn structure that has parallel fibres in the core part of the yarn and fasciated fibre bundles on the sheath part with roughness on the yarn surface. However, pilling of MVS knitted fabric was better than those by ring and compact yarns, which was caused by less and shorter hairy fibres protruded from MVS yarn surface than those of ring and compact yarns. It was observed that tactile hand of MVS yarn knitted fabrics was stiffer than those of ring and compact yarns knitted fabrics. It was explained by low extensibility and compressibility and high bending and shear rigidities of the MVS yarn knitted fabrics, which resulted in bad wearing performance of MVS knitted fabric.

• Journal of Magnetics
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• 제19권3호
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• pp.221-226
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• 2014

Significantly enhanced low-field magnetoresistance (LFMR) and maximum dMR/dH {$(dMR/dH)_{max}$} values were successfully achieved from $La_{0.7}Sr_{0.3}MnO_3$(LSMO)-manganese oxide composite samples prepared by liquid phase sintering, compared with those of the same composites prepared by solid state reaction. For this study, pure LSMO and LSMO-manganese oxide composites with various nominal compositions of (1-x)LSMO-$xMn_2O_3$ (x = 0.1, 0.2, 0.3, 0.4, and 0.8) were sintered at $1450^{\circ}C$, above the eutectic temperature of $1430^{\circ}C$, for 1 h in air. The highest LFMR value of 1.28% with the highest $(dMR/dH)_{max}$ value of 21.1% $kOe^{-1}$ was obtained from the composite sample with x = 0.3 at 290 K in 500 Oe. This enhancement of LFMR and $(dMR/dH)_{max}$ values is ascribed to efficient suppression of magnetic disorder at the LSMO grain boundary, by forming a characteristic LSMO-manganese eutectic structure.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.110-110
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• 2017

Stomata are the main gateways for water and air transport between leaves and the environment. Inward-rectifying potassium channels regulate photo-induced stomatal opening. Rice contains three inward rectifying shaker-like potassium channel proteins, OsKAT1, OsKAT2 and OsKAT3. Among these, only OsKAT2 is specifically expressed in guard cells. Here, we investigated the functions of OsKAT2 in stomatal regulation using three dominant negative mutant proteins, OsKAT2(T235R), OsKAT2(T285A) and OsKAT2(T285D), which are altered in amino acids in the channel pore and at a phosphorylation site. Yeast complementation and patch clamp assays showed that all three mutant proteins lost channel activity. However, among plants overexpressing these mutant proteins, only plants overexpressing OsKAT2(T235R) showed significantly less water loss than the control. Moreover, overexpression of this mutant protein led to delayed photo-induced stomatal opening and increased drought tolerance. Our results indicate that OsKAT2 is an inward-rectifying shaker-like potassium channel that mainly functions in stomatal opening. Interestingly, overexpression of OsKAT2(T235R) did not cause serious defects in growth or yield in rice, suggesting that OsKAT2 is a potential target for engineering plants with improved drought tolerance without yield penalty.

• 천문학회보
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• 제43권1호
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• pp.52.1-52.1
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• 2018

We investigate initial Fe/O enhancements for 44 large gradual solar energetic particles events from 2010 to 2014 and examine the associations of the Fe/O enhancements with the structures of the heliospheric current sheet (HCS). For this study, we use STEREO SIT Fe and O data in 0.32-0.45 MeV channel as well as ACE ULEIS Fe and O data in 0.32-0.64 MeV channel. We determine 1) the magnetic polarities of the SEP source regions using the potential field source surface (PFSS) model of the coronal field and 2) the spacecraft magnetic footpoints with Parker spiral approximation of interplanetary magnetic field using the in-situ measurements of STEREO and ACE. We find that 29 out of 44 events have initial Fe/O enhanced more than 5 times of the typical gradual event values. In the 6 events, the enhancements are simultaneously observed by two spacecraft. There is a tendency that the high Fe/O enhancements are observed near SEP source regions. It is also noted that the Fe/O enhancements are associated with the polarity of the magnetic footpoints. The high Fe/O enhancements are usually observed where their footpoints lie in the same polarity regions of SEP sources rather than the opposite polarity regions. Although Fe/O enhancements could be due to a transport effect and/or a flare contribution, our result implies that the structure of HCS is likely to affect particle propagations in the interplanetary space.