• 융합정보논문지
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• 제11권8호
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• pp.176-184
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• 2021

본 연구는 65세 이상 노인 36명을 대상으로 커뮤니티 케어 사업에서의 주거환경수정이 낙상 위험환경과 대상자의 건강상태에 미치는 영향에 대해 알아보고자 하였다. 주거환경 및 대상자의 특성에 대한 평가를 위해 HOME FAST와 WHODAS-K 2.0을 사용하였으며, 집단 사전·사후 실험연구로 진행되었다. 평가를 바탕으로 주거환경수정 서비스를 시행한 결과, 낙상 위험수준은 통계적으로 유의하게 감소되는 변화를 나타내었으며(p<.01), 건강상태의 경우에는 이동성(p<.01)과 사회참여(p<.05)영역에서 통계적으로 유의하게 향상되어 전반적 건강상태(p<.05)의 변화에도 긍정적인 변화를 보이는 것으로 확인되었다. 향후 더 많은 연구 대상자 확보하고, 포괄적인 주거환경 평가를 활용한 연구가 필요하며, 주거환경수정의 질적 서비스 제공을 위해 대상자 우선순위 선별과정과 전문인력 인프라 확충이 요구된다.

• 인지과학
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• 제35권1호
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• pp.49-95
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• 2024

국내 형사소송절차에서 진술의 진위여부 확인을 위해 사용하는 도구는 폴리그래프검사, 진술타당도분석, P300 기반 숨김정보검사 등이 있고, 이 중에서 폴리그래프검사의 사용빈도가 다른 도구들에 비하여 높다. 하지만, 검사결과를 뒷받침해 줄 수 있는 근거의 부족으로 인하여 재판과정에서 증거채택 가능성이 낮다. 폴리그래프검사를 뒷받침해 줄 수 있는 방법으로, 사전연구가 풍부한 P300기반 숨김정보검사가 주목을 받아 왔지만, 기존의 검사기법은 두 가지 제한점이 있어 실제 사건에서의 활용도는 낮은 편이다. 첫째, 검사에 필요한 관련자극만 3개 또는 6개 등, 사전에 노출되지 않은 정보가 다수 필요하기 때문에 실제 사건에서 사용 가능성이 낮다. 둘째, 기존의 P300기반 숨김정보검사 프로토콜에서는 관련자극과 무관련자극에 대한 P300요소 전위값을 명확하게 구분하기 위하여 오드볼패러다임을 사용하기 때문에 무관련자극에 대한 P300요소 전위값이 과소 추정될 가능성이 있다. 본 연구에서는 검사의 사용 가능성을 높이기 위하여 사전에 노출되지 않은 정보가 단 하나만 있어도 검사가 가능한 단일 관련자극을 사용하는 수정된 P300기반 숨김정보검사 프로토콜을 탐색하였고, 오드볼패러다임 사용으로 인한 무관련자극에 대한 P300요소 전위값이 과소 추정되는 문제를 보완하기 위하여 다양한 기계학습의 분류 알고리즘을 비교하였다. 연구결과 단일 관련자극으로 여성과 남성의 얼굴자극을 사용할 경우, 자극은 400ms 지속시간으로 60회 제시하고, 절단값을 유죄집단은 90%로 무죄집단은 30%로 하여 정점-정점 방법으로 P300요소 전위값을 분석하는 것이 적합함을 확인하였다. 단어자극의 경우, 지속시간을 300ms로 60회 제시하고, P300요소 전위값 분석방법은 얼굴자극과 동일하게 시행하는 것이 적합하다는 것을 확인하였다. 또한 관련자극과 무관련자극에 대한 정점-정점 P300요소 전위값을 6가지 기계학습 분류 알고리즘을 사용하여 분석한 결과, 로지스틱 회귀(LR), 선형 판별 분석(LDA), K-최근접 이웃(KNN) 알고리즘이 관련자극과 무관련자극의 분류에 적합하다는 것을 확인하였다.

• 상하수도학회지
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• 제10권4호
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• pp.103-110
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• 1996

Excessive phosphorus (P as orthophosphate) is one of the major pollutants in natural water that are responsible for algal blooms and eutrophication. P removal by slag is an attractive solution if the P sorption capacity of the slag is significant. To design an efficient land treatment facility, basic information on the behaviour of P in the media-water environment is required. In this study, detailed column experiments were conducted to study the P transport under dynamic condition, and mathematical models were developed to describe this process. The column experiments conducted with dust and cake waste products (slag) from BHP steel industry in Australia as adsorbing media indicated that they had higher sorption capacity of P than that of a sandy loam soil from North Sydney, Australia. P transport in the dust and cake columns exhibited characteristics S-shaped or curvilinear breakthrough curves. The simulated results from a dynamic physical non-equilibrium sorption model (DPNSM) and Freundlich isotherm constants satisfactorily matched the corresponding experimental breakthrough data. The mobility of P is restricted proportionally to the adsorbent's sorption capacity.

• Journal of Korean Neurosurgical Society
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• 제49권1호
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• pp.13-19
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• 2011

Objective: The purpose of this study is to investigate the combined effects of ginkgo biloba extract, ginkgolide A and B and aspirin on SK-N-MC, human neuroblastoma cell viability and mRNA expression of growth associated protein43 (GAP43), Microtubule-associated protein 2 (MAP2), B-cell lymphoma2 (Bcl2) and protein53 (p53) gene in hypoxia and reperfusion condition. Methods: SK-N-MC cells were cultured with Dulbecco's Modified Eagle's Medium (DMEM) media in $37^{\circ}C$, 5% $CO_2$ incubator. The cells were cultured for 8 hours in non-glucose media and hypoxic condition and for 12 hours in normal media and $O_2$ concentration. Cell survival rate was measured with Cell Counting Kit-8 (CCK-8) reagent assay. Reverse transcriptase polymerase chain reaction (RT-PCR) was used to estimate mRNA levels of GAP43, MAP2, Bcl2, and p53 genes. Results: The ginkgolide A and B increased viable cell number decreased in hypoxic and reperfused condition. The co-treatment of ginkgolide B with aspirin also increased the number of viable cells, however, there was no additive effect. Although there was no increase of mRNA expression of GAP43, MAP2, and Bcl2 in SK-N-MC cells with individual treatment of ginkgolide A, B or aspirin in hypoxic and reperfused condition, the co-treatment of ginkgolide A or B with aspirin significantly increased GAP43 and Bcl2 mRNA levels. In MAP2, only the co-treatment of ginkgolide A and aspirin showed increasing effect. The mRNA expression of p53 had no change in all treating conditions. Conclusion: This study suggests that the combined treatments of Ginkgo biloba extracts and aspirin increase the regeneration of neuroblastoma cells injured by hypoxia and reperfusion.

• 한국염색가공학회지
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• 제4권3호
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• pp.122-130
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• 1992

To improve the physical properties and the dyeing properties of silk, the silk fabric was treated with urea resin and reactive dyeing. The effects of urea resin concentration, pH of padding bath and curing condition were investigated in order to find optimum condition and the following results are obtained The optimum condition for the crease recovery of silk fabric was urea resin concentration of 80 g/ι, pH of 7, the curings temperature of about 135$^{\circ}C$, and the curing time of 3 minutes. The crease recovery and the thermal insulation ratio of silk fabric were increased by the above treatment. K/S increased as the adding amount of Na$_2$SO$_4$ increased, K/S, however was not affected by the adding amount of Na$_2$CO$_3$. Co1or fastness of the dyed fabrics treated with urea resin were improved slightly compared with untreated ones.

• 대한수학회보
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• 제60권6호
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• pp.1673-1685
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• 2023

Inspired by Hongjie Dong and Qi S. Zhang's article [3], we find that the analyticity in time for a smooth solution of the heat equation with exponential quadratic growth in the space variable can be extended to any complete noncompact Riemannian manifolds with Bakry-Émery Ricci curvature bounded below and the potential function being of at most quadratic growth. Therefore, our result holds on all gradient Ricci solitons. As a corollary, we give a necessary and sufficient condition on the solvability of the backward heat equation in a class of functions with the similar growth condition. In addition, we also consider the solution in certain L^p spaces with p ∈ [2, +∞) and prove its analyticity with respect to time.

• Journal of Animal Science and Technology
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• 제47권6호
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• pp.1033-1040
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• 2005

본 연구는 분리한 ovotransferrin의 식품소재로서의 단백질 특성과 병원성 미생물에 대한 항균능력을 측정하기 위해 실시하였다. 분리한 ovotransferrin의 수분 흡착력을 pH 3, 7, 11의 조건에서 살펴보았을 때 중성조건에서 다소 증가하는 경향을 보였지만 유의적인 차이는 없었다. 기포의 생성과 안정성은 산성조건인 pH 3에서 기포가 가장 적은 양이 발생되었고 시간이 지남에 따라 급속하게 사라지는 경향을 보였으며 중성조건인 pH 7에서는 기포의 감소의 폭이 적어 안정하게 유지됨을 보였다. 온도가 ovotransferrin의 기포의 발생과 안정성에 미치는 영향은 60℃에서 기포의 발생이 가장 높았으나 처리온도가 90℃ 이상이 되면 현저하게 감소하는 것으로 나타났다. Ovotransferrin의 항균 및 항 곰팡이 효과를 측정해 본 결과 농도에 따른 유의적인 저해효과는 없었으나 다만 25mg/ml의 농도로 처리하였을 때 E. coli, S. typhi, P. aerug와 Candida albican에서만 약한 저해 효과를 나타내었다. Albumin과 lysozyme을 ovotransferrin과 혼합사용이 항균 및 항 곰팡이 효과에 영향하는지를 알아본 결과 albumin과 ovotransferrin을 혼합사용 하였을 때 25mg/ml의 농도에서만 S. typhi와 candida albicans의 억제(++) 효과를 보였고 lysozyme과 ovotransferrin의 혼합사용은 12.5mg/ml의 농도에서만 S. typhi에서 약한 저해(+) 효과를 나타냈으며 candida albican에 대해서는 ++정도의 억제효과를 나타내었다. Ovotrnasferrin 자체의 항균 효과는 25mg/ml의 농도에서만 약한 저해효과를 보였으며 ovotransferrin의 항균 및 항 곰팡이 활성을 상승시키기 위한 lysozyme과 albumin의 역할은 그리 크지 않은 것으로 판단되었다.

• 대한수학회보
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• 제26권2호
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• pp.185-190
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• 1989

In [4], J. Leray introduced the notion of partial hyperbolicity to characterize the operators for which the non-characteristic Cauchy problem is solvable in the Geverey class for any data which are holomorphic in a part of variables x"=(x$_{2}$,..,x$_{l}$ ) in the initial hyperplane x$_{1}$=0. A linear partial differential operator is called partially hyperbolic modulo the linear subvarieties S:x"=constant if the equation P$_{m}$(x, .zeta.$_{1}$, .xi.')=0 for .zeta.$_{1}$ has only real roots when .xi.'is real and .xi."=0, where P$_{m}$ is the principal symbol of pp. Limiting to the case of operators with constant coefficients, A. Kaneko proposed a new sharper condition when S is a hyperplane [3]. In this paper, we generalize this condition to the case of general linear subvariety S and show that it is sufficient for the solvability of Cauchy problem for the hyperfunction Cauchy data which contains variables parallel to S as holomorphic parameters.blem for the hyperfunction Cauchy data which contains variables parallel to S as holomorphic parameters.

• 한국환경과학회지
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• 제6권2호
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• pp.141-152
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• 1997

The pilot plant had been made so as to be an association system from the various items managed to have degrees of efficiency and It have been done to consider the experimental result with irradiance period and pH influence of all major things to treatment function of Waste Stabilization Pond. The results are as following. The attained results for continuous & cyclic irradiance 1. 24L.-reactor was prior to 12L.-12D.-reactor on oxygen generation & algal production ability. 2. 24L.-reactor was prior to 12L.-12D.-reactor on nutrients removal efficiency. 3. In 24L.-reactor it maintained 5mg/L∼6mg/L, DO concent enough to a fish's survival. The attained results for pH condition 1. Oxygen generation ^ algal production in pH 4-reactor were higher than those in pH 10-reactor. 2. The acidic condition at pH 4 and alkalic condition at pH 10 did not so much affect an algal growth and nutrients removal. The attained results for whole 1. In view of the results appeared as [(NH3-N)+(NO3-N)] removal efficiency, 89.1%∼93.9% and PO4-P removal efficiency, 34.3%∼83.7% & COD removal efficiency, 88.5%∼93.9%. It is possible to treat the wastewater with starch and pH which have been known as thedifficult problem. 2. At the point of non using methanol to nitrificate NO3-N, the nutrients removal method by using an algal growth is the most economical method in the whole nutrients removal methods. 3. The nutrients removal method by using an algal growth contributes to natural ecosystem. 4. The nutrients removal method by using an algal growth is excellant in the prevention against the eutrophication.

• 동아시아식생활학회지
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• 제9권3호
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• pp.356-362
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• 1999

Humans may lose considerable amounts of water and electrolytes from sweat during exercise in a hot climate. Optimal ingestion of fluid-replacement beverages may overcome an obstacle factor of exercise performance in the heat. This study was performed the comparison of heart rate and blood lactate between ingestion of Prunus mume solution and water solution during graded maximal exercise using bicycle ergometer in the heat(ambient temperature of 31-32$^{\circ}C$ and relative humidity of 50-55%). Ten healthy no-heat-acclimatized males participated in the study. Exercise duration until all-out of graded testing in the condition of Prunus mume solution ingestion(786.15$\pm$47.66s) was significantly higher(P＜0.05) than the condition of water ingestion. Heart rate at 4 min during graded testing and recovery phase in the condition of Prunus mume solution ingestion was significantly lower(P＜0.05) than the condition of water ingestion. Blood lactate concentration at 30min of recovery phase after graded maximal exercise in the condition of Prunus mume solution ingestion was significantly lower(P＜0.05) than the condition of water ingestion. Recovery rate of blood lactate concentration at 15 min and 30 min of recovery phase after grated maximal exercise in the condition of Prunus mume solution ingestion was significantly lower(P＜0.05) than the condition of water ingestion. Present results suggested that ingestion of Prunus mume solution showed the positive effects on the cardiorespiratory function and acid-base regulation as compared with ingestion of water during graded maximal exercise and recovery phase in hot environment.