Bi-factor MIRT True-Score Equating for Testlet-Based Tests

이규민(Gue min Lee),Won Chan Lee,Michael J Kolen,박인용(In Yong Park),Dong In Kim,Ji Seung Yang 한국교육평가학회 2015 교육평가연구 Vol.28 No.2

Lee and Lee (2014) proposed bi-factor multidimensional item response theory model (BFM) "observed-score" equating procedures. The main purposes of this study were to develop BFM "true-score" equating procedures, and to investigate applicability of the proposed procedures with actual data. Eight equating methods (including both true- and observed-score) based on dichotomous IRT (2-parameter logistic model: 2PL), polytomous IRT (graded response model: GRM), testlet response model (TRM), and BFM were compared with target equipercentile equating. Data for this study were from the Reading Comprehension test for a large-scale state assessment program, which consisted of several passages and corresponding groups of items. True- and observed-score equating methods based upon 2PL and BFM produced similar equating results. The GRM true- and observed-score equating methods provided equating results somewhat different from others, and more similar to the target equipercentile equating. Lee와 Lee(2014) 연구는 혼합형 검사에서의 bi-factor 다차원 문항반응모형을 적용한 IRT "관찰점수" 동등화 절차를 제안하였다. 이 연구는 Lee와 Lee(2014) 연구의 추수연구로 단위검사를 대상으로 bi-factor 다차원 문항반응모형을 적용한 IRT "진점수" 동등화 절차를 제안하고, 그 적용 가능성을 실제 자료를 이용하여 탐색하고자 하였다. 이를 위해 단위검사로 구성된 대규모 독해 검사 자료를 이용하여, 2모수 로지스틱 모형(2-parameter logistic model: 2PL), 등급반응모형(graded response model: GRM), 단위검사모형(testlet response model: TRM), bi-factor 모형(bi-factor model: BFM)을 적용하였으며, 관찰점수 및 진점수 동등화를 시행하여 총 8개의 동등화 방법을 적용하고, 산출된 결과를 동백분위 동등화 결과와 비교하였다. 연구 결과, 2PL과 BFM을 적용한 관찰점수 및 진점수 동등화는 유사한 결과를 산출하였으며, GRM을 적용한 관찰점수 및 진점수 동등화 방법은 다른 방법들과 다소 차이를 보이는 결과를 산출하였고, 비교 기준이 된 동백분위 동등화 결과와 보다 유사한 결과를 보였다.

국내 정형외과 의료소송 현황 파악

이원(Won Lee),이미진(Mi Jin Lee),김용민(Yong Min Kim),우찬명(Chan Myung Woo),김소윤(So Yoon Kim),김양수(Yang-Soo Kim) 대한정형외과학회 2016 대한정형외과학회지 Vol.51 No.3

목적: 국내 정형외과 관련 의료소송 판결문의 분석을 통하여 정형외과 의료소송의 현황과 원인이 된 과정을 파악하고자 함이다. 대상 및 방법: 소송시작이 2005년부터 2010년인 정형외과 의료소송 판결문 341건을 대상으로 하여 빈도분석을 실시하였다. 결과: 사건 발생 시점에서 소송 종결 시점까지의 평균 소요기간은 4.22년이었다. 의료소송의 원인이 된 과정은 수술이 46.3%였고, 수술의 종류는 척추 수술이 가장 많았다. 사고의 결과는 장애가 가장 많았고, 최종심 결과는 원고일부승이 40.5%, 원고패(기각)가 34.3%였다. 감염은 전체 중 26.1%에서 발생하였고, 손해배상 청구금액은 평균 181,998,036원이었으며 인용금액은 평균 58,897,161원이었다. 결론: 정형외과 의료소송으로 이어진 의료사고의 주요 원인 과정은 수술이 가장 많았고, 그 중에서도 척추 수술이 가장 많았다. 추후 의료사고의 근본 원인분석을 통해 의료사고를 줄이고 재발을 방지하기 위한 후속 연구가 이루어져야 할 것이다. Purpose: Through the analysis of orthopedics lawsuit rulings, the purpose of this study is to understand the current trends of medical lawsuits in orthopedics in Korea. Materials and Methods: An analysis of medical lawsuits in orthopedics was conducted. As the study method, a quantitative analysis was performed on 341 cases. Results: The average period of lawsuits, from the occurrence of the medical accident to end of the ruling, took an average of 4.22 years. The most frequent procedure that was the main cause of the medical accidents was surgery, at 46.3%. When surgery is the main procedure that caused the medical accidents, the result of examining the types of surgeries showed that spine surgery had the highest percentage. For the outcome of the accident, the highest number of cases resulted in disability and for the final court outcome, 40.5% ruled partially in favor of the plaintiff (the patient) with acknowledgement of only the damage incurred due to medical error of the total sum claimed, and dismissal of the claim made by the plaintiff (patient) accounted for 34.3%; 26.1% of cases develop infection. For the amount of claim for damage, the average amount of claim was 181,998,036 won; in the judgement amount, the average amount of judgement was 58,897,161 won. Conclusion: The most frequent procedure in orthopedics was surgery and spine surgery comprised a large proportion of these surgeries. Future studies to determine root causes of medical accidents should be conducted to reduce medical lawsuits and to plan against the repeating of medical accidents.

중국의 미니멀리즘 패션에 나타난 미의식 연구 -도가(道家)의 ‘도(道)’ 미학을 중심으로-

양정원(Yang, Jung Won),이미숙(Lee, Mi Suk) 한국디자인문화학회 2021 한국디자인문화학회지 Vol.27 No.2

본 연구 목적은 탈현대적 가치를 갖는 도가사상의 ‘도(道)’ 미학에 주목하여 중국의 미니멀리즘 패션에 내재되어 있는 미의식을 분석하고자 한다. 연구 방법은 선행 연구 및 관련 서적을 중심으로 문헌 고찰을 통해 서양 미니멀리즘과 이와 연관성을 갖는 ‘도’ 미학을 살펴보고 이를 토대로 도가적 미니멀리즘 미의식을 도출한 후 중국의 미니멀리즘 패션의 미의식을 분석하였다. 연구범위는 2008년 이후부터 2021년까지 중국문화에 노출되어 중국문화의 영향을 받은 중국계디자이너들이 전통적 미의식을 통해서 미니멀리즘으로 재해석한 작품을 대상으로 하였다. 서양 미니멀리즘과 상응하는 연관성을 갖는 ‘도’ 미학을 허(虛), 무위자연(無爲自然), 유(遊), 유무상생(有無相生) 등의 미적 개념으로 대별하여 조형적 특성 및 미적 가치를 살펴본 후 도출된 도가적 미니멀리즘의 미의식은 ‘비움의 허무미’, ‘미완의 약졸미’, ‘일기적 공간미’, ‘변증적 상생미’ 등으로 나타났으며 이를 토대로 중국의 미니멀리즘 패션에 내재된 미의식을 분석한 결과는 다음과 같다. 첫째, 서양의 미니멀리즘의 ‘단순성’은 자연의 ‘본질추구’라는 특성을 내포한 ‘허’의 미적 개념과 연관성이 발견되며, ‘허의 미니멀리즘적 단순성’에서 도출된 ‘비움의 허무미’는 무정형이며 일체의 꾸밈이 없는 직선형 실루엣의 간결한 형식으로 표출된다. 둘째, 미니멀리즘의 ‘환원성’은 ‘자연적 본질로의 회귀’라는 특성을 내포한 ‘무위자연’의 미적 개념과 연관성이 발견되며, ‘무위자연의 미니멀리즘적 환원성’에서 도출된 ‘미완의 약졸미’는 인위적 흔적을 덜어내고 자연의 본성 그대로를 전시하기 위해 천연재료의 본형을 살리려는 방법으로 표출된다. 셋째, 미니멀리즘의 ‘상황성’은 ‘절대 자유의 공간 추구’의 특성을 내포한 ‘유’의 미적 개념과 연관성이 발견되며, ‘유의 미니멀리즘적 상황성’에서 도출된 ‘일기적 공간미’는 비구조적 풍성한 실루엣, 천연의 질감을 갖는 소재 등을 통해 표출된다. 넷째, 미니멀리즘의 ‘전체성’은 ‘유무대립의 관계가 상생하여 강렬한 어울림’을 내포한 ‘유무상생’의 미적 개념과 연관성이 발견되며, ‘유무상생의 미니멀리즘적 전체성’에서 도출된 ‘변증적 상생미’는 비대칭, 비균제적 조화를 통해 표출된다. 이상으로 자연주의적 색채가 강한 도가적 미의식은 환경을 고려한 지속 가능한 패션 디자인의 기초자료로 활용되리라 기대된다. The purpose of this study is to analyze the aesthetic consciousness inherent in Chinese minimalism fashion by paying attention to the ‘Do’ aesthetics of the Taoism, which has post-modern values. As a research method, through literature review focusing on previous studies and related books, Western minimalism and its related ‘Do’ aesthetics were examined, and the aesthetic consciousness of Taoist minimalism was derived based on this, and then the aesthetic consciousness of Chinese minimalism fashion was analyzed. The scope of the study was targeted at works that were exposed to Chinese culture from 2008 to 2021 and reinterpreted as minimalism by Chinese designers who were influenced by Chinese culture with a traditional aesthetic consciousness. The aesthetic consciousness of Taoist minimalism, which was derived after examining formative characteristics and aesthetic values by dividing the aesthetics of ‘Do’, which has a corresponding connection with Western minimalism, into aesthetic concepts such as ‘Heo’, ‘Muwi-jayeon’, ‘Yu’, ‘Yumusangsaeng’, appeared as ‘Empty Heomu beauty’ and ‘Unfinished Yakzol beauty’, ‘Ilgijeok Space beauty’, ‘Dialectic Win-win beauty’. Based on this, the results of analyzing the aesthetic consciousness inherent in Chinese minimalism fashion are as follows. First, the ‘simplicity’ of Western minimalism is found to be related to the aesthetic concept of ‘Heo’ which implies the ‘pursuit of the essence’ of nature, the ‘Empty Heo-mu beauty’ derived from ‘Heo’s minimalistic simplicity’ is expressed in a concise form of a straight silhouette without any amorphous ornamentation. Second, the ‘reduction’ of minimalism is found to be related to the aesthetic concept of ‘Muwi-jayeon’, which contains the characteristics of ‘return to the essence of nature’ and ‘Unfinished Yakzol beauty’ derived from ‘minimalistic reducibility of Muwi-jayeon’ is expressed as a way to remove artificial traces and reveal nature. Third, the ‘situationality’ of minimalism is found to be related to the aesthetic concept of ‘Yu’, which contains the characteristics of ‘absolute freedom space pursuit’, and the ‘Ilgijeok Space beauty’ derived from ‘minimalistic situationality of Yu’, is expressed through unstructured silhouettes and natural textures. Fourth, the ‘wholeness’ of minimalism is found to be related to the aesthetic concept of ‘Yumusangsaeng’ that implies ‘intense harmony due to the coexistence of relationships’, and ‘Dialectic Win-win beauty’ derived from the ‘Yumusangsaeng’ of the aesthetics of the ‘existence-free coexistence’ is expressed through asymmetric and non-uniform harmony. As mentioned above, the Taoist aesthetic with strong naturalistic colors is expected to be used as a basic material for sustainable fashion design considering the environment.

기상조절(인공강우와 안개저감)의 경제적 가치 추정 연구

이철규(Chulkyu Lee),장기호(Ki-Ho Chang),차주완(Joo-Wan Cha),정재원(Jae-Won Jung),정진임(Jin-Yim Jeong),양하영(Ha-Young Yang),서성규(Sung-Kyu Seo),배진영(Jin-Young Bae),강선영(Sun-Young Kang),최영진(Young-Jean Choi),조하만(Ha-man Cho) 한국기상학회 2010 대기 Vol.20 No.2

We estimate the economic benefit of weather modification (precipitation enhancement and fog dissipation) by assuming its operation for the considered regions. Based on the statistical data, the economic benefit of the virtually operational precipitation enhancement experiments for the Andong and Imha basins, where the natural precipitation is relatively lack in South Korea, is calculated 348 for the water resources, 22,458 for forest fire prevention, and 28,458 million won/year for the drought relief. The benefit of the fog dissipation operation for the Incheon International Airport is estimated 7,365 million won/year for the flight delay due to fog. The calculated ratio of benefit to cost for precipitation enhancement operation for the basins is 14.07, which is comparable to that conducted in other countries.

사후분해 시체에 대한 법의학적 접근

최영식,이상용,김유훈,조갑래,이봉우,양경무,정낙은,서중석,이한영,이원태,강현욱 大韓法醫學會 2000 대한법의학회지 Vol.24 No.2

Disposal of a homicide victim by dismemberment is rare, but individual cases are on record in most major medicolegal departments. Recognition of postmortem mutilation may be of importance in the interpretation of certain murders committed by sexual perverts and other mentally deranged individuals and sometimes performed for the sole reason of easier disposal of the body. Postmortem dismemberment is usually readily recognizable as such; The edges of the injuries are dry and lack evidence of bleeding. The joints may be disarticulated without fracture, or the use of an axe or saw may be evident from examination of bones. Parallel horizontal or oblique furrows in the bone surface are caused by skipping of the saw prior to establishing depth. Such patterns on the bone may assist in identifying the particular saw involved. So we report 25 dismembered corpses that autopsied in National Institute of Scientific Investigation. This paper can help in attempting to establish not only the first criminal investigation steps but also the medicolegal approach methods in unidentified and dismembered deaths.

의류제품 구매에 있어서 유통채널갈등과 가격단서 지각

양원정;서민정;박재옥;이규혜 한양대학교 2006 韓國 生活 科學 硏究 Vol.26 No.2

Differentiated On Off line channel strategies are getting more attention due to conflicts between Off line channel and active E commerce. Choosing an appropriate channel strategy can prevent apparel products from clashing in market and manage each channel more efficiently. In fashion industry, product prices are flexible because of the short product life cycle and different distribution channels. It is essential to understand consumers’ apparel price cue perception when purchasing apparel in both On line and Off line. The objectives of this study was to examine the effects of apparel price cues on perceived savings and purchase intention in On line versus Off line retail channel. 303 quetionnaires from internet experienced women were used for the data analysis. Statistical analyses employed in this study were descriptive statistics, reliabilities conjoint analysis and regression. Overall, the perceived importance of apparel price cues were different between On line and Off line channels and each apparel price cue affected perceived savings and purchase intention differently according to distribution channels. Therefore, by considering characteristics of apparel price cue in On line versus Off line channels, differentiated channel strategies should be imposed to implement more effective marketing strategies.

브로콜리 추출물의 항산화 유사 물질의 검색

이현승,박양원 동신대학교 환경연구소 2003 환경연구 Vol.8 No.1

국내에서 시판되고 있는 브로콜리(brocoli)를 다섯 부분으로 구분한 후, 세 가지 용매를 사용하여 추출한 각 여액의 antioxidant activity는 DPPH에 의한radical scavenging activity spectrum 측정 방법을 이용하였으며, 추출물들의 온도와 pH의 변화에 대한 안정성을 조사하였다. radical scavenging activity는 에탄올 추출물에서 S, L, F, 아세톤 추출물에서는 L, F 그리고 물 추출물은 L에서 활성이 높았다. 온도 변화에 따른 항산화력은 다른 실험군과 비교하였을 때, 에탄올 추출물의 L, F, 5 그리고 아세톤 추출물의 F, 물 추출물의 L에서 두드러진 활성을 보였지만, 물 추출물의 F는 오히려 산화를 일으켰으나 경미했다. pH 변화에 따른 항산화 활성은 전체 실험군이 산성 쪽에서 큰 활성을 보였다. 특히 에탄올 추출물의 5, FS, F, L, p 와 아세톤 추출물의 F에서 다른 실험 군에 비교되는 높은 활성을 보였다. Dot-blot와 DPPH 염색법에 의한 항산화 물질의 검색방법으로 추출물 모두 항산화 활성이 있는 것을 확인하였다. The antioxidant activity of ethanol, acetone and water extracts of brocoli including leaf, flower, flower plus stem, stem, peel and positive control vitamin C, respectivly, were investigated. Each sample under assay condition showed a dose-dependent free radical scavenging effect of DPPH(1,1-diphenyl-2-pricryl hydrazyl radical) by extracted samples, stable of activity remained after treatment in temperature and pH change. A rapid evalution for antioxidants using TLC screening and DPPH staining methods demonstrated each part of the brocoli extracts having various free radical scavenging capacity stained silica layer ravealed a purple background with yellow spot at the location of drops, which showed radical scavenging capacity.

골격형 Ⅲ급 부정교합자의 경추와 수완부 골 성숙도에 관한 연구

이진형,양원식 대한치과교정학회 1990 대한치과교정학회지 Vol.20 No.1

This study was undertaken to investigate the interrelationships between the degrees of skeletal maturity of cervical vertebrae and the hand-and-wrist in skeletal Class Ⅲ malocclusions. In 185 skeletal Class Ⅲ malocclusions (male 62, female 123) having the lateral cephalogram and hand-wrist radiogram which were taken on the same day, 6 skeletal maturity stages of cervical vertebrae were compared with 11 skeletal maturity indicators of the hand-and-wrist. On the basis of findings of this study, the following results were obtained: 1. The stages of cervical vertebral maturity are one of the methods possible to assess the individual maturity. 2. Mean ages of male and female were obtained in each cervical vertebral stage. 3. Cervical vertebral stages 1 and 2 are considered to the accelerative growth phase, cervical vertebral stages 3 and 4 are corresponded to the peak height velocity, and cervical vertebral stages 5 and 6 were observed to occur during the decelerative phase of growth after peak height velocity in both sexes. 4. In cervical vertebral stages 1, 2, 3, 4, and 5, the degrees of skeletal maturity of cervical vertebrae in males were more retarded than females. 5. There was the high correlation between the degrees of skeletal maturity of cervical vertebrae and hand-and-wrist.

국내산 및 제초제 내성 콩(HS2906)의 일반성분, 무기질 및 지방산 조성

양윤형,이정희,김형진,윤원기,김환묵,김미리 동아시아식생활학회 2005 동아시아식생활학회지 Vol.15 No.1

Proximate analysis, mineral and fatty acid composition of three conventional domestic soybean cultivars and two imported ones including glyphosate-tolerant HS2906 were evaluated by AOAC method, ICP-AES and gas chromatography. There were several differences in the proximate analysis among three conventional domestic soybean cultivars ; higher crude fat in the cultivar Hwanggumkong, higher crude protein in Pungsankong, and higher carbohydrate and crude ash in Duyukong. The ranges of contents of proximate components of domestic cultivars were similar to the data previously reported. There were no significant differences in proximate analysis between conventional soybean WS82 and glyphosate-tolerant HS2906 ; 23.55~23.90% of crudefat, 34.22~35.55% of crude protein, 6.25~6.45% of crude ash, and 25.35~26.47% of carbohydrate. The mineral and fatty acid compositions of HS2906 were similar to those of conventional soybeans previously reported.

어린이집 식단의 영양 균형성 평가

이양자,곽동경,이해숙,오경원 연세대학교 생활과학연구소 2001 生活科學論集 Vol.10 No.1

This study was carried out to evaluate the nutritional balance of recipes collected from five Day-Care Centers; three public and two private centers. Nutrient contents of recipes were evaluated by a self-developed computer program, focusing on the balance of 1) general nutrients, 2) fatty acids and 3) amino acids in lunch and afternoon snack for children aged 4 to 6. The average intake levels of calories, calcium, vitamin A were lower than the recommended levels of the RDA/3. The energy construction of carbohydrate, protein, and fat (CPF ratio) was 56:17:27. The subjects consumed 4.1g of polyunsaturated fatty acids, 2.6g of monounsaturated fatty acids, and 2.4g of saturated fatty acids per lunch and afternoon snack per day. The mean P/M/S ratio of dietary fat was 2.5/1.3/1 (recommendation: 1/1∼1.5/1). The mean ω6/ω3 ratio was 9/1 (desirable rage: 4/1∼10/1). The quality of fat and be improved by including ω3 fatty acid-rich foods such as bean products, seaweeds and fishes more frequently in the diet. Mean daily intake of cholesterol was 50㎎. Quantity and quality of dietary protein were reasonably fair. Varieties in nutritionally balanced menu should be emphasized more for children by nutrition professionals dietitians. It is of utmost importance to support early nutrition in national development and in improving quality of later life.