• 정보화정책
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• 제24권1호
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• pp.48-78
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• 2017

본 연구에서는 공공데이터 개방수준에 미치는 요인을 알아보는 것은 물론 사회자본의 조절효과와 매개효과를 알아보기 위해 총 26개국을 대상으로 공공데이터 개방지수인 ODB와 OUR Index에 대한 다중회귀분석 및 경로분석을 진행하였다. 다중회귀분석결과 종속변수 ODB를 기준으로 할 때 독립변수만을 투입한 모델 1에서는 전자정부, SW시장규모, 정부효과성이 유의미한 정적인 영향을 보였다. 독립변수, 조절변수를 투입한 모델 2에서는 전자정부, SW시장규모, 사회자본이 유의미한 정적인 영향을 보였다. 독립변수, 조절변수, 상호작용항이 투입된 모델 3에서는 전자정부, 사회자본이 유의미한 정적인 영향을 보였다. 종속변수 OUR Index를 기준으로 할 때 모델 1, 모델2에서 전자정부만이 유의미한 정적인 영향을 보였다. 독립변수, 조절변수, 상호작용항이 투입된 모델 3에서는 전자정부, SW시장규모${\times}$사회자본이 유의미한 정적인 영향을 보였다. 경로분석에서는 종속변수 ODB의 대안모형에 대해서 정부효과성만이 사회자본과 완전매개효과를 나타냈다.

• 대한방사선기술학회지:방사선기술과학
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• 제43권2호
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• pp.115-121
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• 2020

In a digital radiation system using a Flat Panel Detector, we attempted to the quality control of digital radiography system using the Exposure Index and Deviation Index. Calibration was performed with the radiation quality suggested by the International Electrotechnical Commission, and through an experiment using a phantom, appropriate inspection radiation conditions applicable to medical institutions were selected. The study was conducted using the selected radiation conditions. Through those chest posterior anterior image, information such as examination conditions and exposure index was obtained. The deviation index was derived by analyzing the exposure index based on the target exposure index calculated by the phantom study. As for the analyzed exposure index, 97.1% was distributed within the range of ± 2.0 based on the deviation index. Quality control of medical images should be performed through management of inspection conditions through exposure index and deviation index and management of medical images.

• 해양환경안전학회지
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• 제24권1호
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• pp.1-9
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• 2018

선박의 안전 확보를 위해 준수해야 하는 IMO 복원성 규칙에는 복원정 곡선(GZ Curve) 등에 관한 내용이 다양하게 규정되어 있다. 이 IMO 복원성 규정에는 다양한 항목의 만족 기준이 제시되고 있으나, 선박을 운항하는 선장에게 선박의 복원성능을 종합적이며, 간편하게 제공할 수 있는 방법은 부재한 상황이다. 이를 위해 본 연구에서는 복원성을 하나의 값으로 표현할 수 있는 지수를 개발하였다. IMO에서 규정한 선박의 6가지 복원성 항목과 대상선박의 적재상황에 따른 복원성 계산결과를 바탕으로 지수산정식이 도출되었다. 또한 개발된 지수산정식을 적용하여 다양한 화물 적재 상황별 복원성 지수(Stability Index)를 계산하였으며, 복원성능의 전반적인 정도를 수치적으로 적절하게 설명할 수 있음을 검증하였다. 이는 선박의 선장에게 복원성 평가하고 판단하는데 도움을 줄 것으로 판단된다.

• 한국화재소방학회논문지
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• 제22권2호
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• pp.57-62
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• 2008

한국의 실내장식재로는 대부분 벽지를 사용하고 있다. 이러한 주거공간에 화재발생시 화재 확대요인중의 하나는 벽지의 연소를 통해 이루어진다. 그동안 산소지수 관련연구들이 많이 이루어져 왔지만 상온에서의 연구가 많았다. 본 연구에서는 실내화재에서 화재의 확대요인이 될 수 있는 벽지의 산소지수가 상온과 고온에서 얼마나 차이가 발생하며 이러한 차이가 화재확대에 미치는 영향을 고찰하고자 하였다. 실험을 통해 LOI 및 TOI 측정한 결과 벽지의 상온과 고온에서의 산소지수는 $5{\sim}8%$정도의 차이가 나타났다. 실험에서 산소지수 0.1%의 차이로도 연소 길이에 현저한 차이가 나타나기 때문에 고온에서의 산소지수 감소가 화재확대에 큰 영향을 미치는 요인임을 알 수 있었다.

• 한국식생활문화학회지
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• 제13권2호
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• pp.141-151
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• 1998

This survey was conducted to investigate the relation of children's obesity index to their mothers' food habit during the October in 1995. The survey covered a total of 492 mothers whose children were in the fifth grade of elementary schools in Cheju City area. The results are summarized as follows: 1.The surveyed children's average WLI(Weight-Length Index) is 107.08. WLI shows that 16.1% of them are overweight, 16.1% obese and 49.8% ideally weighted. The mothers' average BMI(Body Mass Index) is 22.4. 21.8% of them are underweight and 69.4% normal. The children's obesity index is significantly correlated to their fathers', but not significant to their mothers'. 2.As to the food habit I (balance of nutrients intake), 58.4% of the mothers have 'excellent' or 'good' food habit and the mean score is 14.95 out of maximum possible score 24.0. Concerning to the food habit II (intake of sugar, fat and salt etc.), 87.4% of mothers have 'good' or 'fair' food habit and the mean score of is 13.34 out of maximum (possible score) 20.0. The mothers' food habit I and II, as a whole, have no significant effect on the children's obesity index, but in some items the significant relations are founded. The children's chesty index is significantly related to the intake of eggs (P<0.05) and pan-broiled or fried foods (P<0.05). The amount of mothers' food intake is significantly relevant to their obesity index (P<0.001), but not significantly to their children's. The food habit of mothers who have taken midnight snack almost every day are significantly related to their children's chesty index (P<0.05). The findings of the study emphasize the importance of the nutrition education to ensure health and better physical fitness for children and their mothers.

• 한국지능정보시스템학회:학술대회논문집
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• 한국지능정보시스템학회 2000년도 추계정기학술대회:지능형기술과 CRM
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• pp.427-436
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• 2000

The prediction of stock price index is a very difficult problem because of the complexity of the stock market data it data. It has been studied by a number of researchers since they strong1y affect other economic and financial parameters. The movement of stock price index has a series of change points due to the strategies of institutional investors. This study presents a two-stage forecasting model of stock price index using change-point detection and artificial neural networks. The basic concept of this proposed model is to obtain Intervals divided by change points, to identify them as change-point groups, and to use them in stock price index forecasting. First, the proposed model tries to detect successive change points in stock price index. Then, the model forecasts the change-point group with the backpropagation neural network (BPN). Fina1ly, the model forecasts the output with BPN. This study then examines the predictability of the integrated neural network model for stock price index forecasting using change-point detection.

• 대한치과의사협회지
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• 제21권12호통권175호
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• pp.979-984
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• 1983

As an appraisal of Water Fluoridation Program in Chungju, fluoride content in the water of that city was examined, and 1317 K primary school children aged from 6 to 13 were surveyed on their oral hygiene status. The results were as follows: 1. Fluoride content ....................... 0.8 ppm 2. dmfrate ..................................... 81.17% DMF rate .......................................... 38.88% 3. dmf t rate/index ................................ 29.17%/2.55 dmf s rate/index ............................... 14.33%/6.27 4. DMF T rate/index ............................. 6.32%/0.92 DMF S rate/index ............................ 1.86%/1.35

• 대한치과의사협회지
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• 제22권12호통권187호
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• pp.1059-1066
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• 1984

As an appraisal of Water Fluoridation Program in Chungju, fluoride content in the water of that city was examined, and 1176 K primary school children aged from 6 to 13 were surveyed on their oral hygiene status. The results were as followings: 1. Fluoride content ............ 0.8 ppm 2. dmf rate ............ 59.27% DMF rate ............ 39.46% 3. dmf t rate/index ............ 27.75%/2.40 dmf s rate/index ............ 11.91%/5.14 4. DMF T rate/index ............ 6.12%/0.93 DMF S rate/index ............ 1.65%/1.26

• 대한수학회보
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• 제59권3호
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• pp.709-723
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• 2022

In this note, we revise some vanishing and finiteness results on hypersurfaces with finite index in ℝⁿ⁺¹. When the hypersurface is stable minimal, we show that there is no nontrivial L^2p harmonic 1-form for some p. The our range of p is better than those in [7]. With the same range of p, we also give finiteness results on minimal hypersurfaces with finite index.

• Korean Journal of Mathematics
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• 제28권3호
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• pp.405-419
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• 2020

The zeroth-order general Randić index ⁰R_α(G) of the graph G is defined as ∑_u∈V(G)d(u)^α, where d(u) is the degree of vertex u and α is an arbitrary real number. In this paper, the maximum value of zeroth-order general Randić index on the graphs of order n with a given clique number is presented for any α ≠ 0, 1 and α ∉ (2, 2n-1], where n = |V (G)|. The minimum value of zeroth-order general Randić index on the graphs with a given clique number is also obtained for any α ≠ 0, 1. Furthermore, the corresponding extremal graphs are characterized.