• 대한토목학회논문집
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• 제42권5호
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• pp.617-626
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• 2022

우리나라는 기상관측 이래 연평균 강수량과 변동성은 점진적으로 증가하는 추세이고, 지역 간 편차가 크다. 또한, 최근의 이상기후로 인하여 재해에 대한 위험도가 증가되고 있는 실정이다. 풍수해의 피해는 주로 하천주변에서 발생하기 때문에 하천기본계획을 수립하기 위해서는 우선적으로 적정한 설계빈도를 결정하는 과정이 반드시 필요하다. 본 연구에서는 설계빈도 결정에 대한 기존 방법론을 분석하여 문제점 및 개선 방향에 대해 제시하였다. 충청남도에 위치한 지방하천 중 자료구축이 가능한 하천인 413개소를 대상으로, 7개의 평가인자(유역면적, 형상계수, 하도경사, 수계차수, 배수영향 구간, 이상강우 발생빈도, 시가화 침수면적)를 선정하고, 베이지안 추론을 통해 가중치를 산정하였다. 그 결과, 이상강우 발생빈도 및 시가화 침수면적의 가중치가 각각 18로 가장 크게 산정되어, 하천 설계빈도 결정에 큰 영향을 미치는 것으로 판단된다. 이러한 가중치를 통해 설계 빈도를 추정한 결과, 기수립 설계빈도보다 본 연구에서 추정된 설계빈도가 증가하는 하천은 255개이고 감소하는 하천은 158개로 나타났다.

• 한국수자원학회논문집
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• 제54권spc1호
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• pp.1183-1193
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• 2021

Low flow는 하천수의 공급관리 및 계획, 관개용수 등 다양한 분야에 영향을 미친다. 이러한 유황곡선을 산정하기 위해서는 30년 이상의 충분한 기간의 유량자료의 확보가 필수적이다. 하지만 국가하천 단위 이하의 하천의 경우 장기간의 유량자료가 없거나 중간에 일정기간 동안 결측된 관측소가 있어 하천별 유황 곡선을 산정하기에 한계가 있다. 이에 과거에는 미계측 유역의 유황을 예측하기 위해 다중회귀분석(Multiple Regression Analysis), ARIMA 모형 등 통계학적 기반의 기법들을 사용하였지만, 최근에는 머신러닝, 딥러닝 모형의 수요가 증가하고 있다. 이에 본 연구에서는 최신 패러다임에 맞는 머신러닝 기법인 DNN기법을 제시한다. DNN기법은 ANN기법의 단점인 학습과정에서 최적 매개변수 값을 찾기 어렵고, 학습시간이 느린 단점을 보완한 방법이다. 따라서 본연구에서는 DNN 모형을 이용하여 미계측 유역에 적용 가능한 유황곡선을 산정하고자 한다. 먼저, 유황곡선에 영향을 미치는 인자들을 수집하고 인자들 간의 다중공선성 분석을 통해 통계적으로 유의한 변수를 선정하여, 머신러닝 모형에 입력자료를 구축하였다. 통계적 검증을 통해 머신러닝 기법의 효용성을 검토하였다.

• 한국전자통신학회논문지
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• 제17권6호
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• pp.1013-1024
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• 2022

전력 계통에서 발생하는 부하손실은 전기품질 수준을 평가하는 지표로 활용되지만, 국내외 전력 유틸리티들의 수익 창출을 방해하는 가장 큰 요인이 된다. 따라서 전력 계통에서 발생하는 부하손실에 대한 정확한 분석은 매우 중요하다. 그러나 빠르게 증가하는 분산전원 연계로 인해 배전계통의 변동성이 증가하여 정확한 손실량을 계산해내는 것이 점점 어려워지고 있다. 본 논문에서는 분산전원 연계로 인해 배전선로에서 발생하는 부하손실의 더욱 정확한 산정을 위하여 스마트그리드 빅데이터 인프라를 구축하였다. 또한, 스마트그리드 빅데이터의 특성 중 하나인 '불확실성'을 제거하기 위한 데이터 전처리기법을 적용하여, 부하손실 분석의 정확도를 높였다. 본 논문에서 수행한 부하손실 분석 결과는 배전설비 투자계획 또는 안정적인 전력공급 신뢰성과 전력품질을 유지하기 위한 배전계통 운영계획에 기초자료로 활용될 수 있다.

• 대한본초학회지
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• 제28권4호
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• pp.93-100
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• 2013

Objectives : This study was to evaluate the anti-inflammatory and anti-pruritic effects of WSY-1075 composited with Corni Fructus, Angelica gigantis Radix, Lycii Fructus, Ginseng Radix, Cervi parvum Cornu and Cinnamomi Cortex in rat peritoneal mast cells (RPMCs) and scratching mouse model. Methods : WSY-1075 was prepared by extracting with 30% ethanol. In the present study, we investigated the effect of WSY-1075 on the production of tumor necrosis factor-${\alpha}$ (TNF-${\alpha}$), interleukin-$1{\beta}$ (IL-$1{\beta}$) and histamine in rat peritoneal mast cells (RPMCs) activated with phorbol 12-myristate 13-acetate (PMA) plus calcium ionophore A23187, and on the scratching behavior in mice treated with pruriogens. Results : WSY-1075 was not cytotoxic effect in used all concentration. PMA plus A23187 treatment significantly increased TNF-${\alpha}$, IL-$1{\beta}$ and IL-6 production compared with media control in RPMCs. However, TNF-${\alpha}$, $IL1{\beta}$ and IL-6 production increased by PMA plus A23187 treatment were significantly inhibited by WSY-1075 (200 ${\mu}g/mL$ and 400 ${\mu}g/mL$). WSY-1075 also inhibited the histamine release from RPMCs stimulated by compound 48/80, which promotes histamine release. Moreover, WSY-1075 administration had an inhibitory effects on the scratching behavior induced by pruritogen (compound 48/80, histamine, serotonin and substence P) in ICR mice. Conclusion : These results suggest that WSY-1075 administration (200 mg/kg or 400 mg/kg) has the anti-inflammatory and anti-pruritic effects on the activated rat peritoneal mast cell and mouse pruritus. WSY-1075 has a potential use as a composition of medicinal plants for treatment against inflammation- and pruritus-related disease.

• 대한본초학회지
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• 제32권5호
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• pp.1-6
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• 2017

Objectives : Corni Fructus (CF) is traditional herbal medicine used on polyuria, low back pain, and tinnitus. This study aimed to evaluate inhibits skin wrinkle formation effect of CF. Methods : To evaluate the produce inhibition effect of CF, SD-rats were distributed into four groups; normal rats (Nor), AGEs (advenced glycation end product)-induced rats (Con), AGEs-induced rats treated with 100mg/kg CF (CF). To induce AGEs, streptozotocin (50mg/kg) was administered intraperitoneally and after 3 days oral administrated 100mM methyl glyoxal for 3 weeks. Results : The oral administration of CF suppressed the reactive oxygen specis (ROS) in serum. The AGEs in skin tissues was significantly reduced through treatment of CF. Furthermore, the expressions of AGEs related proteins such as polyclonal anti-$N^e$-(carboxymethyl)lysine (CML), anti-$N^e$-(carboxyethyl)lysine (CEL), AGE receptors (RAGE) were decreased in CF treated group compared with the control group in skin tissues. Inflammation-related proteins such as Nuclear factor kappa-light-chain-enhancer of activated B cells (NF-kB), monocyte chemoattractant protein-1 (MCP-1), interleukin-6 (IL-6) reduced in CF treatment group than control group. AGE-induced rats exhibited that the significant decreased collagen however, CF treatment (100mg/kg of body weight) up regulated collagen by improved the expression levels of skin fibril-related genes such as Matrix metalloproteinase (MMP-1). Conclusion : Taken together, our study suggests that CF regulates ROS to prevent accumulation of AGEs and inhibits skin wrinkles. Our finding indicate that CF may be an effective agent for inhibits AGEs formation, and improved skin wrinkle.

• 대한본초학회지
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• 제33권1호
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• pp.47-55
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• 2018

Objectives : The current study is to evaluate the hepatoprotective effect of youngyanggak-san (YGS) on thioacetamide (TAA)-induced acute liver injury in rats. Methods : YGS is composed of Glycyrrhizae Radix, Asiasari Radix, Cimicifugae Rhizoma, Saigae Tataricae Cornu. While N-YGS (non-youngyanggak-san) doesn't include Saigae Tataricae Cornu. Two samples were administrated TAA together for 3 days. Thirty-six rats were divided into four groups. Rats except for the normal group were received TAA (200 mg/kg of body weight, I.P) were divided into three groups (n=9/group) : Group 1 (TAA only), Group 2 (TAA + 200 mg/kg YGS) and Group 3 (TAA + 200 mg/kg N-YGS). Acute liver damage confirmed using histological examination, The factors associated with oxidative stress and liver function activity measured in serum. Also, expressions of inflammation related proteins were investigated by western blot analysis. Results : Oxidative stress factors such as ROS and $ONOO^-$ in the Group 2 was manifested by a significant rise compared with Group 1. YGS markedly decreased the elevated ROS and $ONOO^-$. Furthermore, YGS significantly reduced the levels of serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) The nuclear $factor-{\kappa}B$ ($NF-{\kappa}B$) activation induced by TAA led to increase both inflammatory mediators and cytokines. While YGS administration remarkably suppressed such the overexpression. In addition, the histopathological analysis showed that the liver tissue lesions were improved obviously in YGS treatment. Conclusion : YGS provided a hepatoprotective effect on acute liver damage through the suppression of oxidative stress. Especially, this effect enhanced markedly when Saigae Tataricae Cornu is included.

• 한국프랜차이즈경영연구
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• 제13권2호
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• pp.1-15
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• 2022

Purpose: The globalization of the Korean restaurant franchise industry differs from the business performance of enhancing the brand image and customers' intention to revisit depending on the degree of localization marketing. Therefore, it is necessary to consider the extent to which the localization marketing activities of overseas Korean restaurant franchise companies affect the customer's perception. This study aims to investigate the effects of localization marketing (Localized Menu, Localized Price, Localized Service Experience, Localized Promotion, Localized Physical Environment) of Korean restaurant franchise companies on customer revisit intention. Research design, data, and methodology: For this study, 150 questionnaires using local Korean restaurants in Beijing, China, were analyzed using SPSS Ver.21 and AMOS Ver.22. Result: It was confirmed that the localized menu, localized service experience, and localized physical environment all affect the intention to revisit customers. Based on these verification results, if overseas franchises fully recognize localization marketing, which is an important factor for local business success, and establish localization strategies, they can gain an edge in competition with local Korean restaurants or restaurant franchises founded by locals. There may be a higher probability that However, it was found that localization price and localization promotion had no mediating effect of brand image between revisit intention and revisit intention. It was found that it had no effect on the degree of inquiry and had a negative effect. Conclusions: Due to the impact of the COVID-19 pandemic, there have been many changes in the domestic and overseas food service industry over the past two years. Therefore, in future research, it is necessary to study the localization of overseas Korean restaurant franchise companies that are more multidimensionally subdivided. Various measures of customized localization marketing for optimal regional characteristics should be developed and applied to enhance customer revisiting and brand image of Korean restaurant franchise companies entering overseas. In the future, this study will be meaningful data for the establishment of localization marketing (Localized Menu, Localized Price, Localized Service Experience, Localized Promotion, Localized Physical Environment) strategies for Korean restaurant franchise companies that consider overseas expansion or have already entered.

• International Journal of Computer Science & Network Security
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• 제22권10호
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• pp.183-190
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• 2022

The article analyzes the features of the formation of a person's value attitude to the worldview by means of information technologies. The present considers it necessary to form a person's value attitude to the perception of the world by means of information technologies. The explosive development of information and telecommunications technologies has become a determining factor in the development of modern society, which is called the information or Global Information Society. It is not yet fully formed, and we are all participants in the development of the Global Information Society. The article considers the basics of a harmonious worldview of a person, which is the basis for the formation of outlook ideas, views, knowledge, beliefs about the surrounding world, which determine the place and role and motivate actions in relation to the surrounding reality through the prism of value orientations. Worldview is considered as an integrity of relatively stable schemes, behaviors, feelings, thinking, vision of the surrounding world, inherent in an individual child, ethno-cultural and socio-cultural groups. The concept of "worldview" as a component of the multi-level structure of the individual's outlook is defined. The features that characterize a person's perception of the world are revealed. The main educational value of information technologies in the formation of a person's value attitude to the perception of the world is highlighted, which consists in the fact that they allow you to create an immeasurable brighter multi-sensory interactive learning environment with almost unlimited potential opportunities that fall at the disposal of both the teacher and the student. The trend of forming a person's value attitude to the perception of the world is clearly developing in the direction of mixed learning as a process that creates a comfortable information educational environment, communication systems that provide all the necessary educational information. The approach to student development by means of the educational environment and the formation, while in the person of a value attitude to the perception of the world by means of Information Technologies, has many pedagogical advantages, which is considered in the article.

• 대기
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• 제31권5호
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• pp.625-635
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• 2021

South Korea established the 2050 Carbon Neutral Plan in response to the climate crisis, and to achieve this policy, it is very important to monitor domestic carbon emissions and atmospheric carbon concentration. Both CO₂ and CO are emitted from fossil fuel combustion processes, but the relative ratios depend on the combustion efficiency and the strength of local emission regulations. In this study, the relationship between CO₂ and CO was analyzed using ground observation data for the period of 2018~2020 at Anmyeon-do site and the CO/CO₂ ratio according to regional origin during high CO₂ cases was investigated based on the footprint simulated from Stochastic Time-Inverted Lagrangian Transport (STILT) model. CO₂ and CO showed a positive correlation with correlation coefficient of 0.66 (p < 0.01), and averaged footprints during high CO₂ cases confirmed that air particles mainly originated from eastern and north-eastern China, and inland of Korean Peninsula. In addition, it was revealed that among the cases of high CO₂ concentration, when the CO/CO₂ ratio is high, the industrial area of eastern China is greatly affected, and when the ratio is low, the contribution of the domestic region is relatively high. The ratio of CO₂ and CO in this study is significant in that it can be used as a useful factor in determining the possibility of domestic and foreign origins of climate pollutants.

• 한국건축시공학회지
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• 제22권1호
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• pp.69-80
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• 2022

30년 이상 된 노후 건축물의 비율은 2005년 29.0%에서 2019년 37.8%로 증가하였다. 이러한 노후 건축물은 화재 안전 성능 등 건축 관련 안전기준이 부재했던 시기에 조성된 건축물이다. 사용 과정에서 불법적인 변경과 증축이 이뤄져 안전에 더욱 취약해졌을 것으로 예상된다. 다중이용건축물 등 대형재난을 막기 위해 소방 안전 조사가 이뤄지고 있지만 대규모 노후 건축물이 밀집한 지역구 차원에서는 조사가 이뤄지지 않고 있다. 따라서 노후 건축물이 밀집한 노후 건축지구에서 화재 위험 요인을 도출하기 위해 우선 건축물의 구성 특성을 분석하였다. 화재 위험 요소 도출을 위한 노후 건축지구의 공간적 특성을 살펴보기 위하여 건축물 구조, 용도, 지붕형태, 사용승인연도를 기준으로 분석한 결과, 건축물 사용승인일을 기준으로 건축물의 주구조가 가장 큰 영향이 있었으며, 건축물 주구조를 기준으로 주거환경개선지구의 경우 지붕형태, 그 외 지역은 건축물의 주구조가 가장 큰 영향이 있는 것으로 나타났다.