Reliability and Data Integration of Duplicated Test Results Using Two Bioelectrical Impedence Analysis Machines in the Korean Genome and Epidemiology Study

박보영,양재정,양지현,김지민,Lisa Y.Cho,강대희,신철,홍영습,최보율,김성수,박만석,Sue K. Park 대한예방의학회 2010 예방의학회지 Vol.43 No.6

Objectives: The Korean Genome and Epidemiology Study (KoGES), a multicenter-based multi-cohort study, has collected information on body composition using two different bioelectrical impedence analysis (BIA) machines. The aim of the study was to evaluate the possibility of whether the test values measured from different BIA machines can be integrated through statistical adjustment algorithm under excellent inter-rater reliability. Methods: We selected two centers to measure inter-rater reliability of the two BIA machines. We set up the two machines side by side and measured subjects’ body compositions between October and December 2007. Duplicated test values of 848 subjects were collected. Pearson and intra-class correlation coefficients for inter-rater reliability were estimated using results from the two machines. To detect the feasibility for data integration, we constructed statistical compensation models using linear regression models with residual analysis and R-square values. Results: All correlation coefficients indicated excellent reliability except mineral mass. However, models using only duplicated body composition values for data integration were not feasible due to relatively low R2 values of 0.8 for mineral mass and target weight. To integrate body composition data, models adjusted for four empirical variables that were age,sex, weight and height were most ideal (all R2>0.9). Conclusions: The test values measured with the two BIA machines in the KoGES have excellent reliability for the nine body composition values. Based on reliability, values can be integrated through algorithmic statistical adjustment using regression equations that includes age, sex, weight, and height

카릴 처칠의 『비네가 톰』에 삽입된 노래의 의미 : 여성 억압에 대한 역사적 재현과 비판

박보영 21세기영어영문학회 2015 21세기영어영문학회 학술대회 Vol.2015 No.03

콜로이드 수용액에 의한 선편광 산란 실험과 실험 결과의 물리 교육적 의미

박보영,김학수,김영민 한국물리학회 2002 새물리 Vol.45 No.6

This is a light scattering experiment of the linearly polarized light due to the colloidal particles suspended in water. The colloidal solution was milk, and the light detector was video camera. The layout of the components used in the experiment was as follows. The milk solution was contained in a glass beaker whose wall was covered by a piece of black hard paper except a small window part and the upper mouth of the beaker. The linearly polarized light was directed toward the upper mouth of the beaker and the scattered light was detected in the direction which is perpendicular to the incident light direction. The result of the experiment was agreed upon the Rayleigh scattering formula satisfactorily which predicted the maximum and minimum scattering directions. From this experiment we can suggest that this experiment might be used in high school physics lab or in college introductory physics lab for confirming the light to be a transverse wave. 주변에서 쉽게 구할 수 있는 미립자 수용액인 묽은 우유에 가시광을 비추어 산란 실험을 실시하였다. 그리고 산란광의 측정에 있어서도 쉽게 구할 수 있는 비디오카메라로 산란광을 촬영하여 영상처리 프로그램으로 분석하는 방법을 사용하였다. 이 실험은 Rayleigh 이론식이 예측한 산란각 gamma에 따른 광의 세기 사이의 관계, 즉 I cos2 gamma 와 잘 일치하는 결과를 보여주었다. 따라서 본 실험은 고등학교나 대학에서 고가의 장비를 쓰지 않고서도 빛이 횡파인 것을 보이는 실험으로 사용될 수 있을 것으로 생각된다.

Epidemiological characteristics of ovarian cancer in Korea

박보영,박소희,김태중,마승현,김병기,김용만,김재원,강석범,김재훈,김태진,유근영,박수경 대한부인종양학회 2010 Journal of Gynecologic Oncology Vol.21 No.4

Objective: This study was conducted to examine recent trends in ovarian cancer incidence and mortality and secular trends in demographic factors in Korea. Methods: With the data from Korea Central Cancer Registry, International Agency for Research on Cancer, Korean Death Registry, and World Health Organization’s Statistical Information System, we calculated age-standardized incidence and mortality rates for ovarian cancer. Also we estimated future incidence of ovarian and cervical cancer using linear regression model. To assess the demographic trend, data from national surveys in Korea or results from published papers were searched. Results: Ovarian cancer incidence rate was similar to that in women worldwide but lower than those in Western countries, and the trend has been increased steadily. Ovarian cancer-related mortality rates have been increasing in Korea, even though those in western and some Asian countries, such as China, have been decreasing. Age-specific incidence rate and mortality rate showed steep increases with advancing age. The incidence rate of ovarian cancer was estimated to surpass that of uterine cervix cancer in 2015. Korea showed rapid changes in nutritional, reproductive,and anthropometric factors. Conclusion: These recent trends in ovarian cancer incidence and mortality may be partly attributed to gradual westernizing of life styles and to changes in socio-demographic behavior factors. In particular, the increasing trend in ovarian cancer mortality in Korea may be attributed to a real rise in mortality as well as, in part, a decline in misclassification bias related to an increase in the proportion of deaths confirmed by physician diagnosis.

SNS 이용자의 치과 SNS 특성에 관한 인식도

박보영,안선민,배은아,김현경,박소연,박효은,하늘별,윤미숙 한국치위생과학회 2022 대한치위생과학회지 Vol.5 No.2

Background: This study was aimed at investigating the perception of social network service (SNS) users regarding dental office visits and determining the proportion of dental SNS users among general SNS users. Methods: We surveyed 177 adults using SNSs. Dental SNS characteristics were classified into information provision, interaction, recency, reliability, and interest, and the recognition level of each area was surveyed on a 5-point scale. The total number of items was 17, including three information provision, three interaction, four recency, four reliability, and three interest items. Results: Among the five domains, the recognition level was the highest for reliability (3.51 points) and the lowest for interest (2.94 points). Among the 17 items, the recognition level was the highest for “Educational information provided by dental SNS is valuable” at 3.60 points, “Dental SNS educational video is useful for information sharing and dental knowledge improvement” at 3.53 points, and “The perceived educational information of dental SNS is reliable” at 3.51 points. Participants in their 20s and 30s had higher scores for being up-to-date (3.33 and 2.88 points, respectively) and reliability (3.59 and 3.09 points, respectively) than those in their 40s or older. The recognition level of all areas of dental SNS characteristics was significantly higher for experienced dental SNS users than for nonexperienced ones. Conclusions: The results of this study suggested that dental institutions should consider ways to utilize SNS for patient management and education and that dental SNS-related contents should contain educational and reliable information to help SNS users manage their oral health.

카릴 처칠의 『클라우드 나인』 -성과 권력의 변화에 대한 연극적 재현

박보영 인문사회 21 2019 인문사회 21 Vol.10 No.6

이 연구는 카릴 처칠의 『클라우드 나인』을 통해 가부장적 권력에 의한 불평등한 성 역할과 이성애 중심주의의 억압성과 이에 대한 변화 가능성을 제시하는 것을 목적으로 한다. 이러한 목적을 위해 성 교차 배역을 중심으로 본 연구가 진행되었다. 성 교차 배역은 남성 배우가 수행하는 여성 인물의 역할을 통해 강요된 여성성과 남성성이라는 엄격하게 분리된 성적 역할을, 여성 배우가 수행하는 남성 동성애자 역할을 통해 배타적인 이성애 중심주의를 보여준다. 배우의 성과 인물의 성을 다르게 함으로써 성 역할의 구분을 해체하는 것은 확고한 성 역할의 구분과 이성애 중심주의의를 해체하는 것을 재현한다. 따라서 『클라우드 나인』이 지향하는 비전은 위계적인 성 역할이 남성과 여성을 구분하는 기준이 되지 않고 인간관계가 특정한 권력의 이익을 위해 강압적으로 통제되지 않으며 개인의 욕망과 자유가 성 역할의 제약을 넘어서 평등하게 존중받는 사회에 대한 가능성이다. This study aims to show the oppression of the patriarchal power, strictly divided gender role, and exclusive heterosexuality and the possibility of its change through Caryl Churchill’s Cloud Nine. The gender-cross casting shows the strictly divided gender roles as forced femaleness and maleness through the male actor performing a female character, and the exclusiveness of heterosexuality through the female actor performing a gay character. In addition, the gender-cross role suggests dismantling both strictly divided gender role and exclusive heterosexuality. Therefore, Cloud Nine suggests the possibilities for the new society that hierarchal gender role is not the standard to divide male and female, human relations are not controlled for the interest of exclusive social power, and the desire and freedom of individuals are equally recognized.

태아심박동 자료를 위한 분류기법들의 비교에 관한 연구

박보영,강희재,윤옥수,최원영 한국자료분석학회 2015 Journal of the Korean Data Analysis Society Vol.17 No.3

The purpose of this study is to find out optimal classification technique method for fetal heart rate (FHR) important data to check health problems to a fetus. Especially, we focus on finding classification method which distinguish can normal fetus and interine growth restriction fetus. Linear discriminant analysis and logistic regression as parametric classification, and decision tree, k-nearest neighbor and support vector machine (SVM) as non-parametric classification are used in this study. Also not only accuracy but also specificity and sensitivity are considered in comparing. As the results, it shows more than 90% high-accuracy in all 4 classification methods except for k-nearest neighbor and the specificity values is more than 0.850. As for sensitivity, linear discriminant and SVM are 0.890 and 0.898, respectively. It confirm that k-nearest neighbor is not good at FHR since the accuracy and sensitivity are 0.799 and 0.652 respectively. On the other hand, balanced accuracy, measurement which consider sensitivity and specificity, of SVM, linear discriminant analysis and logistic regression are 0.930, 0.928 and 0.912 respectively. 본 연구는 태아의 안녕평가를 위해 중요한 자료로 이용되고 있는 태아심박동(fetal heart rate) 자료에서 최적의 분류기법을 찾는데 목적이 있다. 특히 정상태아와 자궁내 발육제한(interine growth restriction; IUGR) 태아를 분류 할 수 있는 최적의 모형을 찾고자 한다. 분류기법들은 모수적 분류기법인 선형 판별분석(linear discriminant analysis)및 로지스틱 회귀분석(logistic regression)과 비모수적 방법으로 의사결정나무(decision tree), -최근접 이웃(-nearest neighbor) 및 지지도벡터기계(support vector machine; SVM)를 시행하였다. 또한 성능평가 측도로 정확도(accuracy)뿐 아니라 임상자료에서 널리 이용되는 측도인 특이도(specificity)와 민감도(sensitivity)를 함께 고려하여 그 성능을 비교하였다. 분석 결과, -최근접 이웃을 제외한 4가지 분류기법은 90%이상의 높은 정확도를 보여 주었다. 또한 5가지 분류기법 모두 0.850 이상의 높은 특이도 값을 보였고, 민감도에서 선형 판별분석과 SVM이 각각 0.890과 0.898로 가장 우수하였다. 한편, 민감도와 특이도 값을 동시에 고려하기 위한 측도인 안정된 정확도(balanced accuracy)는 SVM에서 0.930 그리고 선형 판별분석과 로지스틱 회귀분석이 각각 0.928과 0.912로 나타났다.

자료 소개 : 일제강점기 독일선교사들의 한국기록 -선교지(宣敎誌) 『Mssionsblatter』 (1909~1949)-

박보영 경북사학회 2015 복현사림 Vol.33 No.-

좋은 학부모 역할 정립을 위한 고찰

박보영 한독교육학회 2007 교육의 이론과 실천 Vol.12 No.1

Synthesis and application of nitrogen doped graphene nanoplatelets

박보영,이민석,장동욱 한국고분자학회 2016 한국고분자학회 학술대회 연구논문 초록집 Vol.41 No.1