시차주사열량측정법에 의한 니켈기 초내열 합금의 열분석

윤지현,오준협,김홍규,윤존도,Yun, Jihyeon,Oh, Junhyeob,Kim, Hongkyu,Yun, Jondo 한국재료학회 2016 한국재료학회지 Vol.26 No.5

Appropriate thermo-mechanical properties of nickel-based superalloys are achieved by heat treatment, which induces precipitation and solid solution hardening; thus, information on the temperature ranges of precipitation and dissolution of the precipitates is essential for the determination of the heat treatment condition. In this study, thermal analyses of nickel-based superalloys were performed by differential scanning calorimetry method under conditions of various heating rates of 5, 10, 20, or 40K/min in a temperature range of 298~1573K. Precipitation and dissolution temperatures were determined by measuring peak temperatures, constructing trend lines, and extrapolating those lines to the zero heating rate to find the exact temperature under isothermal condition. Determined temperatures for the precipitation reactions were 813, 952, and 1062K. Determined onset, peak, and offset temperatures of the first dissolution reaction were 1302, 1388, and 1406K, respectively, and those values of the second dissolution reaction were 1405, 1414, and 1462K. Determined solvus temperature was 1462K. The study showed that it was possible to use a simple method to obtain accurate phase transition temperatures under isothermal condition.

18~19세기 대형 불화에 사용된 회청(Smalt) 안료에 관한 연구

윤지현,김소진,김규호,YUN, Jihyeon,KIM, Sojin,KIM, Gyuho 국립문화재연구원 2022 헤리티지:역사와 과학 Vol.55 No.3

The purpose of this study is to analyze the chemical composition of smalt pigments used in 10 large Buddhist paintings in the Joseon Dynasty using energy dispersive X-ray spectroscopy, and to clarify the material and characteristics by observing morphological characteristics using polarized light microscopy and a scanning electron microscope. Through chemical composition analysis, the smalt of all 10 large Buddhist paintings is judged to be potash glass using SiO₂ as a former and K₂O as a flux. In addition to the components related to cobalt ore used as a colorant, the paintings were found to contain high levels of As₂O₃, BaO, and PbO. The smalt particles did not have specific forms, and were blue in color, with various chromaticity. In some particles, conchoidal fracture, spherical bubbles, and impurities were observed. Through backscattered electron images, it was found that the smalt from paintings produced in the early 18th century AD had a high level of As, but the smalt from paintings produced from the mid-18th century AD onwards exhibited various contrast differences from particle to particle, and there was smalt with high levels of As, Ba, and Pb. Through the above results, the large Buddhist paintings in the Joseon Dynasty are divided into three smalt types. Type A is a type with high As₂O₃, type B is a type with high BaO, and type C is a type with high PbO. Looking at the three types of smalt pigments by the period of production, although some in-between periods were not detected, type A was confirmed to have been used from 1705 to 1808, while type B and type C were shown to have appeared in 1750 and used until 1808. This reveals that only one type of smalt was used until the early 18th century AD, and from the middle of the 18th century AD, several types of smalt were mixed and used in one large Buddhist painting. Studies such as this research are expected to provide insights into the characteristics of the smalt pigments used to produce large Buddhist paintings at the time.

2013 국립중앙도서관 협력교육과정 주요 발표자료 - 전문도서관의 설립과 운영 : 농심식문화전문도서관을 중심으로

윤지현,Yun, Ji-Hyeon 한국전문도서관협의회 2013 KSLA bulletin Vol.5 No.-

동해안권 관광개발 활성화 방안 : 고성, 속초, 양양, 강릉지역을 중심으로

윤지현 ( Ji Hyun Yun ),정문규 ( Moon Kyu Chung ) 관광경영학회 2008 관광경영연구 Vol.36 No.-

북한의 군중무용-서양 사교춤의 북한식 전유에 관한 연구

윤지현 ( Ji-yun Yoon ) 대한무용학회 2019 대한무용학회논문집 Vol.77 No.4

This study analyzes North Korean mass dance as a case of ‘North Korean-style appropriation’ of western social dance. The society of North Korea does not admit the connection to the western social dance, emphasizing that mass dance is ‘a new tradition’ based on the anti-Japanese revolutionary dance which was enjoyed by guerrilla fighters in the period of Japanese occupation. North Korean mass dance is interpreted as accepting the legacy of national dance in that it uses traditional dance movements as bodily movements and traditional folk songs as music that follows the dance.

분산 메모리 다중프로세서 상에서의 병렬 음성인식

윤지현(Ji-Hyeon Yun),홍성태(Sung-tae Hong),정상화(Sang-Hwa Chung),김형순(Hyung-Soon Kim) 한국정보과학회 1998 한국정보과학회 학술발표논문집 Vol.25 No.2Ⅲ

본 논문에서는 음성과 자연언어의 통합처리를 위한 효과적인 병렬 계산 모델을 제안한다. 음소모델은 continuous HMM에 기반을 둔 문맥종속형 음소를 사용하며, 언어모델은 knowledge-based approach를 사용한다. 또한 계층구조의 지식베이스상에서 다수의 가설을 처리하기 위해 memory-based parsing 기술을 사용하였다. 본 연구의 병렬 음성인식 알고리즘은 분산메모리 MIMD 구조의 다중 Transputer 시스템을 이용하여 구현되었다. 실험을 통하여 음성인식 과정에서 발생하는 speech-specific problem의 해를 제공하고 음성인식 시스템의 병렬화를 통하여 실시간 음성인식의 가능성을 보여준다.

F1/F2의 변화가 한국어 /오/, /우/ 모음의 지각판별에 미치는 영향

윤지현(Yun, Jihyeon),성철재(Seong, Cheoljae) 한국음성학회 2013 말소리와 음성과학 Vol.5 No.3

This study examined the perception of two Korean vowels using F1/F2 manipulated synthetic vowels. Previous studies indicated that there is an overlap between the acoustic spaces of Korean /o/ and /u/ in terms of the first two formants. A continuum of eleven synthetic vowels were used as stimuli. The experiment consisted of three tasks: an /o/ identification task (Yes-no), an /u/ identification task (Yes-no), and a forced choice identification task (/o/-/u/). ROC(Receiver Operating Characteristic) analysis and logistic regression were performed to calculate the boundary criterion of the two vowels along the stimulus continuum, and to predict the perceptual judgment on F1 and F2. The result indicated that the location between stimulus no.5 (F1 = 342Hz, F2 = 691Hz) and no.6 (F1 = 336Hz, F2 = 700Hz) was estimated as a perceptual boundary region between /o/ and /u/, while stimulus no.0 (F1=405Hz, F2=666Hz) and no.10 (F1=321Hz, F2=743Hz) were at opposite ends of the continuum. The influence of F2 was predominant over F1 on the perception of the vowel categories.

과학적 창의성 관점에서 살펴본 영재교육종합 데이터베이스(GED)의 초등 과학영재교육 프로그램 특징 분석

윤지현 ( Yun Jihyeon ),강훈식 ( Kang Hunsik ) 한국초등과학교육학회 2021 초등과학교육 Vol.40 No.2

이 연구에서는 영재교육종합 데이터베이스(GED)에서 제공하는 초등 과학영재교육 프로그램 수상작을 과학적 창의성 관점에서 분석하였다. 이를 위해 해당 분석 기준을 개발한 뒤 우수 프로그램 55개에 포함된 840개의 탐구활동을 분석하였다. 연구 결과, 과학적 창의성 요소 5가지 중, ‘과학적 탐구기능’, ‘과학 지식 내용’, ‘창의적 사고’가 많이 포함되었다. 하지만 ‘문제해결력’과 ‘공통 요소’는 비교적 적게 포함되어 있었다. 통합의 측면에서는 2가지 요소의 통합과 3가지 요소의 통합이 자주 나타났으며, 통합이 없는 유형도 자주 나타났다. 4가지 요소의 통합이나 5가지 요소의 통합은 적게 나타났다. ‘과학 지식내용’, ‘과학적 탐구기능’, ‘창의적 사고’ 등이 다른 요소들과 함께 통합되는 빈도가 높았다. 그러나 ‘공통 요소’ 또는 ‘문제해결력’이 다른 요소와 통합되는 경우는 적게 나타났다. 이에 대한 교육적 시사점을 논하였다. This study analyzes the characteristic of elementary science-gifted education winner programs in Gifted Education Database (GED) focusing on scientific creativity. For this purpose, an analysis framework to analyze the programs was developed and a total of 840 inquiry activities from 55 winner programs were analyzed according to the analysis framework. The analysis of the results reveal that ‘scientific inquiry skill’ of the five scientific creativity components was most frequently included in the activities. ‘Scientific knowledge content’ and ‘creative thinking’ were also frequently included. However, ‘problem solving ability’ and ‘common factor’ were a little included. In the aspects of integration, the integrations between two or three components with five or eight types were frequently found. No integrations were also frequently included although less than the previous categories. The integrations among four with four types or five components were also slightly found. ‘Scientific knowledge content’, ‘scientific inquiry skills’, and ‘creative thinking’ with other components were more frequently found. However, the integrations of ‘common factor’ or ‘problem solving ability’ with the other components were less frequently found. Educational implications of these findings are discussed.

한국 사회적기업의 법적 구조 특성 비교 연구

윤지현(Yun Ji Hyun) 한국인권사회복지학회 2013 인권복지연구 Vol.- No.14

본 연구는 문헌적 접근을 통해 직간접적으로 인권에 기여하고 있는 사회적 기업의 법적 구조 특성을 사회성, 기업성, 비영리성, 민주성, 책임성, 공식성, 제도적 지원이라는 일곱 가지 측면에서 검토하여 한국 사회적 기업 발전의 정책방향에 대한 함의를 도출해 보고자 한다. 특히 법적인 측면에서 2007년에 입법된 사회적 기업육성에 관한 법률이 정착하고 더 발전하여 한국의 사회 문제 해결을 할 수 있도록 돕기 위해서 사회적기업육성법을 미국의 저영리유한회사(Low-profit Limited Liability Company : L3C)법, 영국의 공동체이익회사(Community Interest Company : CIC)법, 이탈리아의 사회적협동조합(Social Cooperative)법과 사회적 기업(Social Enterprise)법, 프랑스의 공익협동조합(Societe Cooperative D'Interet Colletif : SCIC)법을 중심으로 비교 분석하여 그 구조적 특성을 알아보고, 지속가능한 사회적 기업의 운영을 위한 정책적 방향에 대한 함의를 도출하였다. 한국 사회적 기업은 그 제도를 도입하는 과정에 있어서 노동통합적인 목적으로 법적 구조가 만들어진 관계로 취약계층 중심의 고용 중심, 한정된 의미에서의 사회성, 정부 재정에의 의존, 지나치게 제한된 자산분배, 정부 주도의 인증을 통한 진입장벽 등 협소한 법적 형태의 한계를 보였다. 이에 본 연구에서는 여러 국가들과의 법적 구조 비교를 통해 더 포괄적이고 적극적으로 사회혁신을 추구하여 사회적 기업을 육성하여야 한다는 것을 시사하고, 사회적 기업의 독립성 및 자율성을 존중하여 사회적 기업이 발전할 수 있는 통합적 발전방향을 모색할 것을 제안한다. Social Enterprises contribute to improve the human rights directly or indirectly. On this study, the characteristics of such social enterprises' legal structures are reviewed through following seven aspects: sociality, enterprise, nonprofit, democratic, responsibility, officiality, and institutional support. Through comparing such aspects of Korean social enterprises with those of advanced nations', I would find the way to develop the policies for Korean social enterprises. Especially, I compared the Social Enterprise Promotion Act legislated in 2007 with Low-profit Limited Liability Company(L3C)of U.S.A, Community Interest Company (CIC) of U.K., Social Cooperative and Social Enterprise of Italy, and Societe Cooperative D'Interet Colletif (SCIC) of France to take root and develop the Korean Social Enterprise Promotion Act. It is expected to solve Korean social problems that the policy way for sustainable social enterprises is drawn after examining the characteristics of the legal structures and analyzing the differences and similarities among those acts. The legal frame of Korean social enterprises was made to integrate labor in the process of introducing the institution. Therefore, it shows the limitations of narrow legal structures like these: centering to employ the disadvantaged class, limited meaning of sociality, depending on government finances, too much limited asset allocation, and entry barrier by the government-led authentication. Thereupon, I suggest that the social enterprises in Korea should be promoted with pursuing social innovation more comprehensively and positively after comparing other pioneer countries' social enterprises, and that the integrated way to prosper the Korean social enterprises should be groped with valuing the independence and autonomy of social enterprises.

내국인 카지노도입에 대한 제주 지역민 태도 연구

윤지현 ( Ji Hyun Yun ),최동석 ( Dong Suk Choi ) 관광경영학회 2008 관광경영연구 Vol.37 No.-