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.

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.

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.

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.

水素化된 非晶質 게르마늄의 特性調査(Ⅰ)

梁承勳,李原鎭,朴奉斗 慶北大學校 1985 論文集 Vol.39 No.-

Reactive thermal evaporation(RTE) was developed as a new method to deposit hydrogenated amorphous germanium films. RTE was carried out by the evaporation of high purity polycrystalline germanium in an atmosphere of hydrogen plasma produced by high voltage AC discharge of molecular hydrogen. Electrical conductivity and its annealing behavior, electron probe micro-analyzer and scanning electron microscopy were used to characterize the samples. Optimal conditions of sample preparation (from electronic point of view) were determined to be substrate temperature of 200℃ and hydrogen pressure of 1 Torr. Crucible type was proved to have an influence on the sample properties. The sample prepared at the optimum conditions shows the activated type conduction above room temperature.

만성기침을 하는 10세 이하의 소아에서 알레르기 요인과 MAST와의 연관성

이원희,양은석 朝鮮大學校 附設 醫學硏究所 2008 The Medical Journal of Chosun University Vol.33 No.3

목적: 최근 알레르기 질환의 증가와 더불어 만성 기침의 원인 중에서 알레르기 질환의 비율도 증가하고 있다. 만성 기침은 환아 부모님들의 걱정을 유발하여 불필요한 항생제 치료를 증가시키고 있다. 따라서 만성 기침을 하는 소아에서 알레르기 질환을 감별하는 것은 정확한 진단뿐 만 아니라 효과적인 예방 및 치료를 가능하게 한다. 본 연구의 목적은 MAST 양성률과 알레르기 요인과의 관계성을 알아보고 또한 연령과의 연관성이 있는지도 알아보고자 하였다. 방법: 2002년 3월 부터 2006년 6월 까지 만성 기침을 주소로 조선대학교 병원 소아과에 입원한 1세에서 10세 사이의 소아를 대상으로 설문 조사와 혈액 검사를 시행한 45명을 대상으로 하였다. 설문 조사를 통해 아토피 피부염의 병력, 세기관지염의 병력, 알레르기 질환의 가족력, 가족 구성원 중 흡연자의 유무, 가정 내 애완동물(개, 고양이)의 유무, 카페트 사용 여부에 대해 조사하였고 MAST와 총 IgE 값과 호산구수를 측정하였다. 결과: MAST 결과 북아메리카 집먼지 진드기에 양성을 보인 경우는 55.5%로 가장 높았고 집먼지가 45.6%, 유럽 집먼지 진드기는 애완동물은 28.8%, 음식물은 26.7%였으며 MAST 결과가 양성인 26명과 음성인 19명을 두군으로 나누어 비교하였을 때 MAST 양성군에서 나이가 7-10세로 많은 경우는 12명이었으며 MAST 음성군은 1명으로 유의한 차이를 보였고(P= 0.009), 아토피 피부염은 19명과 4명으로 유의한 차이를 보였으며(P= 0.022), 알레르기 질환의 가족력도 25명과 6명으로(P= 0.008) 유의한 차이를 보였다. MAST 양성군 29명의 총 IgE 평균값은 896.9 ± 922.4 IU/mL, MAST 음성군 16명의 총 IgE 평균값은 101.4 ± 129.4 IU/mL로 두 군 간에 유의한 차이를 보였으며(P< 0.001), 호산구수는 두 군에서 각각 405.4 ± 349.7 /μl와 240.6 ± 237.2 /μl 로 두 군 사이에 유의한 차이를 보이지 않았다(P= 0.1). 결론: 3주 이상의 만성 기침을 한 환아에서 MAST 양성률은 연령(7-10세), 아토피 피부염의 병력, 알레르기 질환의 가족력과 높은 연관성을 보여 알레르기 질환에 대한 적절한 검사와 치료가 필요할 것으로 생각된다. Purpose: The recent increase in the incidence of allergic diseases coincides with the increased proportion of allergic diseases as the cause of chronic cough. This has led to the anxiousness of parents about their children with the use of antibiotics in the majority of the cases. Therefore, the differentiation of the cause of the chronic cough will lead to the decrease of unnecessary treatment with effective prevention and treatment. The purpose of this study is to identify the correlation between allergic factors and Multiple Allergosorbent Test (MAST). Method: A total of 45 children between the ages of 1 through 10 years with at least 3 weeks of chronic cough were included in the study. MAST, eosinophil count and total IgE were tested. The patient's personal history of atopic dermatitis, bronchiolitis, family history of allergy, smoking by family, pets and floor covering of the home were reviewed extensively. Results: Twenty-six children of 46 children (68.9%) were tested positive for MAST and 19 children were tested negative. The factors that were strongly correlated to the results of the MAST were the age (7-10 years), history of atopic dermatitis, family history of allergy and total IgE. However, smoking by family, pets, floor coverings of the house and eosinophil count were not relevant to the results of the MAST. Conclusion: I could identify significant contributors through MAST in chronically coughing children and it will lead to improve them with good treatment result.

한국인 태아의 악안면 성장 발육에 관한 연구

양원식,이석근,김철수 대한치과교정학회 1990 대한치과교정학회지 Vol.20 No.3

The objective of this study was to understand the major changes of craniofacial dimensions and spatial growth pattern during the late embryonic and fetal period of human fetures. This study was performed with the selective materials of normal fetuses received from the Registry of Congenital Malformation of Seoul National University Hospital. The specimens consisted of nineteen embryos and sixty-six fetuses. The photomicrographs from mid-segittal sections of embryos were used for angular measurement, and the lateral cephalograms taken with soft X-ray were also measured in liners and angular aspects. All of the anatomical landmarks for the tracing of the photomicrographs and cephalograms were referred to the previous reports on literature. The sequential changes of prenatal craniofacial dimensions and agles were analyzed statistically and discussed on the focus about the developmental growth directions of human oro-facial structure arised from heterogeneous origins. The results are as follows, 1) Cranial base angle was almost formed at about 6 weeks old embryos with the average angle of 127.4 ±6.33°(n=3) and it was almost constant onwards. 2) The linear increase rates of anterior cranial base length and anterior facial height exceeded those of the posterior cranial base length and posterior facial height, and the maxilla grows more rapidly on the horizontal dimension than the vertical dimension during the fetal period. 3) The angular relationship between the anterior cranial base and palatal plane decreased slightly during the fetal period, disclosing 11°at 12th week gestation and 5°at 41th weeks gestation. 4) Gonial angle was maintained almost constantly at about 130° during the fetal period from 12 weeks to 41 weeks of gestation.

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.

알코올의 섭취가 흰쥐의 혈액과 간의 지질대사에 미치는 영향

이명숙,김영연,김효숙,김매하,전진순,서진숙,송선미,양영재,윤원손,이미라,이효영,정승현 誠信女子大學校 生活文化硏究所 2004 生活文化硏究 Vol.18 No.-

To investigate the effects of ethanol on the lipid metabolism in blood and liver, twenty one male Sprague Dawley rats had orally taken the 25% alcohol and 50% alcohol by 5g per Kg of weight during 3 weeks after the adjusting period. For the energy balance, 85% sucrose and 45% sucrose was added in control group and 25% alcohol group each. The weight was reduced by alcohol treatment according to the levels, otherwise the weight of liver and heart was little increased in alcohol groups rather than in control without significance. Moreover, RBC, WBC, hemoglobin and hematocrit were increased by alcohol treatment according to the levels without significance. Otherwise, adjusted bilirubin levels by 100g of weight was significantly increased by alcohol treatment dose dependently. Alcohol induced RBC degradation and increased circulated bilirubin because of liver damage. For blood lipid profiles, blood cholesterol was increased in 50% of alcohol group compared to that of 25% and control groups, otherwise, blood triglycerides (TG) was increased by 30% in 25% alcohol groups rather than in control but not significantly different. The hepatic lipid composition, cholesterol levels in alcohol treatment groups was lower than those in control. The hepatic TG was not influenced by alcohol treatment. The two reasons of decreasing hepatic lipids were suggested by 85% sucrose of control for energy balance more synthesized cholesterol and TG than those in 25 or 50% alcohol groups, and by cholesterol and TG could not be synthesized because of liver damage from alcohol.

수소화된 비정질 규소에서 바이어스에 의한 실리사이드 형성

梁承勳,金鐵河,李原鎭 慶北大學校 1990 論文集 Vol.49 No.-

We show that biased annealing of a-Si:H contacted with metal gives rise to silicide growth and the creation of metastable states that can be to some extent removed by unbiased annealing. This paper gives the first report of a direct correlation of Ⅰ-Ⅴ characteristics to silicide growth in a-Si: H. Variations of Ⅰ-Ⅴ characteristics with annealing biases are analysed by the two series-connected diodes model.