• Journal of Preventive Medicine and Public Health
• /
• 제31권3호
• /
• pp.471-480
• /
• 1998

This study was undertaken in order to estimate the accuracy of disease code of the Korean National Medical Insurance Data and disease the characteristics related to the accuracy. To accomplish these objectives, 2,431 cases coded as notifiable acute communicable diseases (NACD) were randomly selected from 1994 National Medical Insurance data file and family medicine specialists reviewed the medical records to confirm the diagnostic accuracy and investigate the related factors. Major findings obtained from this study are as follows : 1. The accuracy rate of disease code of NACD in National Medical Insurance data was very low, 10.1% (95% C.I. : 8.8-11.4). 2. The reasons of inaccuracy in disease code were 1) claiming process related administrative error by physician and non-physician personnel in medical institutions (41.0%), 2) input error of claims data by key punchers of National Medical Insurer (31.3%) and 3) diagnostic error by physicians (21.7%). 3. Characteristics significantly related with lowering the accuracy of disease code were location and level of the medical institutions in multiple logistic regression analysis. Medical institutions in Seoul showed lower accuracy than those in Kyonngi, and so did general hospitals, hospitals and clinics than tertiary hospitals. Physician related characteristics significantly lowering disease code accuracy of insurance data were sex, age group and specialty. Male physicians showed significantly lower accuracy than female physicians; thirties and fortieg age group also showed significantly lower accuracy than twenties, and so did general physicians and other specialists than internal medicine/pediatric specialists. This study strongly suggests that a series of policies like 1) establishment of peer review organization of National Medical Insurance data, 2) prompt nation-wide expansion of computerized claiming network of National Medical Insurance and 3) establishment and distribution of objective diagnostic criteria to physicians are necessary to set up a national disease surveillance system utilizing National Medical Insurance claims data.

• 응용통계연구
• /
• 제10권1호
• /
• pp.69-84
• /
• 1997

선형 캘리브레이션 실험계획 문제에 대하여, 베이지안 의사결정론을 이용하여 평균제곱오차손실을 최소화한 Kim(1988, 1993)의 실험계획과 관련 문헌의 결과인 몇 가지 최적계획을 비교한다. 비교대상 실험계획으로서 고전적 추정량의 점근분산을 최소화하는 Buonaccorsi(1986)의 최적계획, 회귀분석 모형에서 $ M(x) = \sum x_i x_i '$의 함수를 최대화 또는 최소화하는 D-optimal 또는 A-optimal 계획, Hunter and Lamboy(1981)가 베이지안 추정량의 특성을 설명하기 위하여 그 논문에서 예로 들었던 실험계획을 고려한다. 서로 다른 기준에 의한 최적계획을 비교하기 위해서 우선 기대사후분산을 계산하여 비교하고 몇가지 사전분포에 대하여 몬테칼로 시뮬레이션을 통한 평균분산과 HPD 구간의 크기를 비교한다.

• 대한원격탐사학회지
• /
• 제33권6_2호
• /
• pp.1041-1046
• /
• 2017

환경부는 각종 환경이슈에 효과적으로 대응하기 위해 토지피복지도를 포함한 다양한 환경공간정보를 제작 및 서비스해 오고 있다. 최근 4차 산업혁명 시대의 도래와 빈번한 환경재해의 발생으로 인해 환경공간정보와 최신 기술의 결합에 대한 필요성이 증대되고 있다. 이에 환경부는 대한원격탐사학회 주관으로 환경공간정보의 새로운 활용분야 발굴과 미래 인력 지원을 목적으로 2017년 환경공간정보 우수논문 공모전을 개최하였다. 올해 공모전에 접수된 51편 논문의 심사 결과, 9편이 최종 우수논문으로 선정되었다. 이 특별호에 게재된 9편의 논문은 최근 환경이슈와 더불어 환경공간정보를 기반으로 최신 방법론과 응용 결과를 제시하고 있다. 이 특별호 논문에서 소개된 분석 기술과 응용분야가 환경공간정보 사용자들에게 유용한 참조자료가 되기를 기대한다.

• 대한원격탐사학회지
• /
• 제36권5_4호
• /
• pp.1179-1194
• /
• 2020

본 연구에서는 지상기상센서가 설치되지 않은 미 관측지점의 기온정보를 추정하기 위하여 K-최근접 이웃, 랜덤 포레스트, 신경망 알고리즘을 대상으로 위성영상을 이용하여 기온자료를 산출하고 그 정확성을 평가·분석하고자 하였다. 위성영상자료는 2019년에 취득된 Landsat-8과 MODIS Aqua/Terra을 이용하였으며, 기상자료는 기상청과 산림청의 AWS/ASOS 자료를 이용하였다. 또한 추정 정확도를 향상시키기 위하여 수치표면 모델, 일사량, 경사방향, 경사도를 생성하여 이용하였다. 머신러닝 알고리즘 정확도 비교는 10-fold 교차검증을 통하여 R²(결정계수) 및 RMSE(평균제곱근오차)의 통계량을 계산하여 대상지역별 추정결과를 비교하였다. 그 결과 신경망 알고리즘이 R²=0.805, RMSE=0.508로 세 알고리즘 중 가장 안정적인 결과를 나타내었다. 신경망 알고리즘을 구축된 위성영상 데이터셋에 적용하여 2019년 6월부터 9월까지의 평균기온 지도를 생성할 수 있었으며 세밀한 기온 정보를 관측할 수 있음을 확인하였다. 연구 성과는 폭염 대응 정책, 열섬완화 연구 등 국가재난안전 관리에 활용 될 수 있을 것으로 기대된다.

• 한국수자원학회논문집
• /
• 제44권2호
• /
• pp.85-96
• /
• 2011

연최대수문량의 도시적 분석에 주로 이용되어 온 확률도시위치는 표본자료와 적정 확률분포형의 적합도를 표시하여 초과확률을 산정할 수 있도록 하며, 일부 적합도 검정에도 사용되기도 한다. 확률도시위치를 결정하는 도시위치공식은 오래 전부터 꾸준히 연구되어 왔는데, 특히 빈도해석에 널리 사용되는 GEV 분포에 대한 연구는 다른 분포형보다 더욱 활발히 이루어져 왔다. 본 연구에서는 GEV 분포에 적합한 도시위치공식을 추정하고자 GEV 분포의 순서통계량의 평균 개념을 이용하여 이론적 축소변량을 유도하였다. 또한 다양한 표본크기와 형상 매개변수와 연관이 있는 왜곡도 계수를 고려한 다양한 형태의 도시위치공식을 적용하고, 유전자 알고리즘을 적용하여 도시위치공식의 매개변수를 추정하였다. 유도된 도시위치공식의 정확성을 알아보기 위해 이론적 축소변량과 금회 유도된 도시위치공식을 포함한 다양한 도시위치공식에 의해 계산되는 축소변량 사이의 오차를 비교하였다. 그 결과, 본 연구에서 제안한 도시위치공식은 GEV 분포의 형상 매개변수가 -0.25~0.10의 범위를 가질 때 이론적 축소변량과 가장 작은 오차를 보이는 것으로 나타났다.

• 대한임상독성학회지
• /
• 제5권1호
• /
• pp.27-35
• /
• 2007

Purpose: Organophosphate (OP) compounds insecticides are the most commonly associated with serious human toxicity all over the world. The aim of this study was to identify sociocultural factors that contribute to high incidence of pure OP poisoning and prevent OP poisoning in order to reduce the factors responsible for deaths in South Korea. Methods: This is the 38 multi-centers survey and prospective study of pure OP poisoning by structural reporting system and hospital records from August 2005 to July 2006. 238 patients with acute pure OP poisoning were enrolled. We collected patient information regarding poisoning, clinical, and demographic features. Results: The mean age was $55.32{\pm}17.3$ years old. The most frequent site of exposure was their own residence(85.7%). Frequent compounds involving pure OP poisoning were dichlorvos(22.7%), methidathion(8.4%), and phosphamidon(6.7%). Intentional poisoning was 77.9%. The most frequently route of exposure was ingestion(94.5%). The mean arrival time to hospital after poisoning was 12.7 hours and mean hospitalization duration was 12.9 days. 2-PAM was administered to 101 patients in mean doses of 6.3 g/day intravenously. Atropine was administered to 81 patients in mean doses of 74.6 mg/day (maximal 910 mg/day). The presence of lower level of GCS score, respiratory complications, hypotension, acute renal failure, and serious dysrhythmia was associated with serious and fatal poisoning. Overall final mortality in pure OP poisoning was 9.7%(23/238). Conclusion: This study highlights the problem of pure OP poisoning in South Korea as a basic national survey. Futhermore this might help the establishment of strict policies availability of OP and the statistics of OP poison exposure in South Korea.

• 지역사회간호학회지
• /
• 제13권4호
• /
• pp.743-756
• /
• 2002

Purpose: This study is a descriptive and comparative study that compares health state and school adaptation between children in divorced family and in normal family. Study results will provide a basic data for the development of an intervention program designed to help children in divorced family adjust to their crisis. Method: The study subjects consisted of 700 children in 4th. 5th or 6th elementary school grade, residing Seoul and Kyunggi regions. Among these subjects, 123 were children with divorced family and 577 were children with normal family. The health status of the subjects was measured by Health Symptom Questionnaire developed by Shin and revised by the investigators. The instrument consisted of 30 items measuring physical and emotional health symptoms. The level of school adaptation of the subjects was measured by School Adaptation Scale developed by Lee, which consisted of 4 dimensions with 20 items what measures relationship with peer students, learning activity, observance of regulation, and participation of school activity. The investigators visited the schools and collected data in the classes using the questionnaire after explaining the purpose and procedures of the study to the children. The data were analyzed by descriptive statistics, $\yen\"{o}2$-test, t-test, ANOVA using the SPSS PC + statistical program. Result: First, the mean health state score in children with normal family (M=11.99) was higher than that in children with divorced family (M=19.15), showing a significant difference (t=-6.51, p=.000) between the two groups, which suggests that children with normal family have better health state than children with divorced family. Second, the mean school adaptation score in children with normal family (M=38.99) was higher than that in children with divorced family (M=26.97), showing a significant difference between the two groups (t=104.07, p=.000), which suggests that the school adaptation of children with normal family is better than that of children with divorced family. Third, in comparison of health state between the two groups by general characteristics. there were significant differences between the two groups in sex. the most contributing factor to health status of the children, school year. birth order, religion, school achievement, amount of monthly pocket money, parents level of formal education, occupation of parents, economic status (p<.05). Forth, in comparison of the level of school adaptation between the two groups by general characteristics, there were significant differences between the two groups in most variables (p<.05), suggesting that children with normal family had better capacity of school adaptation than children with divorced family. Conclusion: As a result. this study showed that the parent's divorce had great influence on children's health status and school adaptation capacity. The implication for nursing is that there is a need to develop supportive interventions for the high-risk children who have decreased health states and school adaptation capacity due to the divorce of their parents. In addition, it is recommended that further studies should be conducted to explore protective factors for the prevention of health and adaptation problems in children.

• 지역사회간호학회지
• /
• 제14권2호
• /
• pp.323-333
• /
• 2003

This is a comparative descriptive study conducted for 178 middle-aged women who were residing in Seoul and aged between 41 to 64 (95 in control group, and 83 in experimental group). The study was aimed to examine their climacteric symptoms, degree of fatigue, depression, anxiety and quality of sleep and to examine the differences on the symptoms between the two groups. Data were collected from April 1 to May 15, 2002 through self-statement using structured questionnaires. The collected data were verified with descriptive statistics, ? -test, t-test, ANOVA using SPSS/PC(+). The results are as follows. 1) The average scores of the climacteric symptoms were 1.56 .36 for the control group, and 1.55 .33 for the group taking relexzone massage, showing no significant difference between the groups (t=.15, p=.88). 2) The average scores of the degree of fatigue were 2.17 .65 for the control group, and 2.40 .66 for the group taking relexzone massage, showing a significant difference between the groups. (t=-2.31, p=.02) 3) The average scores of depression were 1.91 .50 for the control group, and 2.05 .42 for the group taking relexzone massage, showing a significant difference between the groups (t=-1.99, p=.05). 4) The average scores of anxiety were 1.54 .60 for the control group, and 1.57 .53 for the group taking relexzone massage, showing no significant difference between the groups (t=-.33, p=.74). 5) The average scores of quality of sleep were 2.97 .49 for the control group, and 2.98 .42 for the group taking relexzone massage, showing no significant difference between the groups(t=-.08, p=.93). Based on these results, the middle-aged women who take relexzone massage are considered to have less fatigue and depression than those who do not. As physiological regression progresses and the structure and role in the family are restructured, middle-aged women are like to experience various climacteric symptoms. As a nursing intervention, relexzone massage can be applied to middle-aged women to reduce their stress, climacteric symptoms and emotional anxiety, ultimately promoting their health. In order to implement relexzone massage as a nursing intervention, further testing on the psycho-neuroimmunologjcal effects of relexzone massage is necessary.

• 한국근적외분광분석학회:학술대회논문집
• /
• 한국근적외분광분석학회 2001년도 NIR-2001
• /
• pp.1612-1612
• /
• 2001

The production of grain for export and domestic use is one of Australia's most important agricultural industries, and the NIR technique has been used extensively over many years for the routine monitoring of grain quality, particularly moisture and protein content. Because most Australian grain is intended for human food production, the determinants of grain quality for livestock feed, apart from protein, have been largely ignored. However the increasing use of grain for feeding to pigs, poultry, beef cattle and dairy cows has led to an important national research project entitled “Premium Grains for Livestock”. Two of the objectives of this project are to determine the compositional and functional characteristics of grains which influence their nutritional quality for the various classes of livestock, and to adopt rapid and objective analytical tests for these quality criteria. NIR has been used in this project firstly to identify a set of grain samples from a large population of breeders' lines which showed a wide spectral variation, and hence a potentially wide variation in nutritional value. The selected samples were not only subjected to an extensive array of chemical, physical and in vitro analyses, but also were grown out to produce sufficient quantities of grain to feed to animals in vivo studies. Additional grains were also strategically selected from farms in order to include the effect of weather damage, such as rain, drought and frost. In this study to date, NIR calibrations have been derived or attempted, on both ground and whole grains, for in vivo dry matter digestibility (DMD), pepsin-cellulase dry matter disappearance, protein, fat, acid detergent fibre, neutral detergent fibre, starch, in sacco DMD and in vitro assays to simulate starch digestion in the lumen and small intestine. Results so far indicate high calibration accuracy for chemical components (SECV 0.3 to 2.6%) and very promising statistics for in vivo DMD (SECV 1.8, $R^2$ 0.93, SD 7.0, range 61.9 to 92.3, n=60). There appears to be some potential for NIR to estimate some in vitro properties, depending upon the accuracy of reference methods and appropriate sample populations. Current work is in progress to extend the range of grains with in vivo DMD values (a very laborious and expensive process) and to increase the robustness of the various NIR calibrations, with the aim of implementing uniform testing procedures for nutritional value of grains throughout Australia.

• 한국수학교육학회지시리즈E:수학교육논문집
• /
• 제25권1호
• /
• pp.261-288
• /
• 2011

본 연구에서는 짝 도우미 협력학습이 중학교 2학년 확률, 도형의 성질과 도형의 닮음 등 세 영역의 학업성취에 미치는 영향을 살펴보았다. 이 연구를 수행하기 위하여, 2009년 가을 학기에 OO도에 소재하고 있는 한 여자중학교의 2학년 2개 반을 연구대상으로 선정하여, 사전 학업성취도 검사를 통하여 실험집단과 비교집단으로 설정하였다. 협력학습은 실험집단에서 매주 2-3회씩 문제해결 시에 실시되었고, 각 단원 종료 시에 두 집단 모두에서 학업성취도검사를 실시하였다. 또한 협력학습에 대한 학생들의 태도에 대하여 설문조사하였고, 학업성취도검사와 설문조사는 통계처리 하였다. 결론적으로 본 연구에서 시행한 짝 도우미 협력학습은 확률과 도형의 닮음 단원에서 효과적이었다. 또한, 설문조사 결과에 따르면, 학생들은 본 연구에서 적용한 짝 도우미 협력학습을 통하여 집단에서의 자신의 역할을 반성하고 공동체 정신을 함양할 수 있는 기회를 가졌다.