한국어 프레젠테이션 능력 향상을 위한 기호 읽기 교육 연구 -학습자 발표에 나타난 기호의 언어화를 중심으로-

이경희 ( Lee¸ Kyunghee ) 한국언어문화교육학회 2021 언어와 문화 Vol.17 No.3

This study aims to examine what Korean language learners should learn to restore symbols of presentation materials in natural sentences. How to verbalize the compressed content of visual materials in the presentation is significant. Symbols are a typical way used to compress content. Therefore, restoring symbols to complete sentences is an essential element of presentation ability. This study analyzed the process of Korean language learners organizing visual materials and using them to present them. In particular, we focused on how they expressed symbols in vocabulary, grammar, and sentence patterns in the target language. The significance of the study is that it reminded us of the importance of verbalizing symbols in the Korean language presentation. (Kyung Hee University)

Matchmaker : Fuzzy Vault Scheme for Weighted Preference

Tuvshinkhuu Purevsuren(툽신후),Jeonil Kang(강전일),DaeHun Nyang(양대헌),KyungHee Lee(이경희) 한국정보보호학회 2016 정보보호학회논문지 Vol.26 No.2

Juels와 Sudan의 퍼지 볼트 기법은 기법이 갖는 오류 내성 때문에 많은 연구에 사용 되어오고 있다. 그러나 이들의 퍼지 볼트 기법은 그들의 논문에서 영화 애호가 문제를 예를 들었음에도 불구하고, 사람들이 일반적으로 갖는 선호도(preference)의 차이에 대한 고려가 존재하지 않는다. 한편, Nyang과 Lee는 안전하고 성능이 좋은 얼굴인증 시스템을 만들기 위해서, 얼굴 특징이 서로 다른 가중치를 갖도록 얼굴 특징과 퍼지 볼트(vault) 사이에 특별한 연관 구조를 갖는 얼굴 인증 시스템(이른바, 퍼지 얼굴 볼트)을 소개하였다. 그러나 그들의 기법은 일반적인 특징 추출 기법들이 클래스 내부/간 차이를 최적화하려는 특성이 있기 때문에 인증 실패율을 성공적으로 낮추지 못할 것으로 쉽게 예상할 수 있다. 이 논문에서는 퍼지 볼트의 유연성을 제공해주기 위하여 Nyang과 Lee의 퍼지 볼트기반의 얼굴 인증 시스템에서 가중치 아이디어를 다른 방식으로 구현한 버킷(bucket) 구조와 사용자 선호도와 시스템 구현 간 관계를 공식화하는 세 가지 분포 함수에 대해서 소개한다. 또한 이를 바탕으로 선호도 매치메이커(preference matchmaker) 기법을 제안하며, 영화 데이터베이스를 이용하여 이러한 매치메이커의 연산 성능을 확인해본다. Juels and Sudan’s fuzzy vault scheme has been applied to various researches due to its error-tolerance property. However, the fuzzy vault scheme does not consider the difference between people’s preferences, even though the authors instantiated movie lover’ case in their paper. On the other hand, to make secure and high performance face authentication system, Nyang and Lee introduced a face authentication system, so-called fuzzy face vault, that has a specially designed association structure between face features and ordinary fuzzy vault in order to let each face feature have different weight. However, because of optimizing intra/inter class difference of underlying feature extraction methods, we can easily expect that the face authentication system does not successfully decrease the face authentication failure. In this paper, for ensuring the flexible use of the fuzzy vault scheme, we introduce the bucket structure, which differently implements the weighting idea of Nyang and Lee’s face authentication system, and three distribution functions, which formalize the relation between user’s weight of preferences and system implementation. In addition, we suggest a matchmaker scheme based on them and confirm its computational performance through the movie database.

최근 제안된 두 그룹서명기법의 암호분석

하등과(DengKe Ha),김기태(KiTae Kim),양대헌(DaeHun Nyang),이경희(KyungHee Lee) 한국정보보호학회 2010 정보보호학회논문지 Vol.20 No.5

연결불가능성(unlinkability)과 추적불가능성(traceability)은 그룹서명이 만족해야 하는 기본적인 요구사항이다. 본 논문에서 최근 Lee등과 Zhu등에 의해서 제안된 두 그룹 서명기법들이 갖는 취약점을 분석하였다. Lee등의 기법은 합법적인 서명자가 생성한 서명을 검증할 수 없는 설계상의 치명적인 문제를 갖고 있으며, 검증과정이 안고 있는 문제와 별개로 동일한 서명자가 생성한 서명을 항상 링크할 수 있음을 보인다. 또, Zhu등의 그룹서명기법에서 그룹의 관리자가 추적할 수 없도록 서명을 생성하는 것이 가능함을 보이고, 저자들의 주장과 달리, 그들의 기법이 전방향 안전성을 만족하지 않음을 보인다. Unlinkability and traceability are basic security requirements of a group signature scheme. In this paper, we analyze two recent group signature schemes, Lee et al.'s scheme and Zhu et al.'s scheme. We show that Lee et al.’s scheme does not work correctly. Further, it fails to meet unlinkability, that is, anyone who intercepts or receives group signatures are able to check if they are from the same signer. We also show that Zhu et al.'s scheme is unable to satisfy traceability, that is, a malicious group member can generate valid group signatures that cannot be opened. Moreover, once becoming group member, the malicious group member will never be revoked from group. Besides, Zhu et al.'s scheme fails to satisfy forward security, a requirement claimed by authors.

무용예술에서의 라반동작분석법의 총체적 의의

이경희,Lee, Kyunghee 성균관대학교 트랜스미디어연구소 2019 트랜스- Vol.6 No.-

학문적인 연구를 위한 목적으로 사용되는 라반 동작분석법(Laban Movement Analysis)의 핵심은 움직임을 통한 개인의 심리 또는 정서 상태는 내적의도에 의해 외적인 움직임으로 표현되며, 그것은 내면 정서의 상징성을 띠고 있다는 것으로부터 출발한다. 또한 라반동작분석법은 움직임의 대상의 구조가 어떠했는지, 그 구조를 과거 또는 다른 구조와 비교 분석적으로 해석하는데 중점을 두며, 분석된 춤의 문법들은 궁극적으로 심리적·사회적·문화적인 다양한 측면에서 서로의 '관계성' 찾을 수 있는 단서를 제공한다. 또한 춤의 '순간성'으로부터 함의된 시스템용어로 기록의 자원을 제공하고, 그것은 다학적인 연구자료로서 교육적 가치를 지닌다. The core of Laban Movement Analysis, which is used for academic research purposes, is that the individual's psychological or emotional state through movement is expressed in external motion by internal intention, which is symbolic of internal emotions. In addition, the Laban motion analysis focuses on analyzing the structure of the object of movement and its structure comparatively and analytically with the past or other structures, and the analyzed grammars of the dance ultimately influence each other in psychological, social and cultural aspects 'Relationality' provides clues to be found. It also provides a resource of records in terms of the system implied from the 'momentary nature' of dance, which has educational value as a multidisciplinary research material.

복소 포텐셜을 이용한 로봇 축구용 다개체 로봇의 경로 계획

이경희,김동한,류근호,Lee, Kyunghee,Kim, Donghan,Rew, Keun-Ho 제어로봇시스템학회 2012 제어·로봇·시스템학회 논문지 Vol.18 No.12

This paper deals with the trajectory planning of multi agent robots using complex potential theory for robot soccer. The complex potential theory is introduced, then the circle theorem is used to avoid obstacles, and the vortex pair is used to make precise kicking direction of robot. Various situations of robot soccer are simulated and the effect of vortex strength and the speed of robots are discussed and the better way to avoid obstacles and to kick the precise direction is found. The feasibilities of complex potential theory to apply for the multi agent robots are successful.

스네이크를 이용한 얼굴 요소의 윤곽선 추출

이경희(Kyunghee Lee),변혜란(Hyeran Byun),정찬섭(Chansup Chung) 한국정보과학회 1998 한국정보과학회 학술발표논문집 Vol.25 No.1B

본 논문은 얼굴 인식 분야에 있어서 중요한 특징을 나타내는 얼굴의 주요소인 눈과 입의 영역 추출 및 그의 윤곽선 추출에 관한 방법을 제시한다. 얼굴 요소 영역 추출에는 주로 히스토그램 분석과 색상 정보를 이용한 연구들이 이루어지고 있는데, 본 논문에서는 얼굴 요소별 특성을 고려한 엣지 추출과 이진화에 따른 프로젝션 히스토그램 분석에 의하여 눈과 입의 경계영역을 추출한다. 얼굴 영상에 관련된 윤곽선 연구에는 기하학적인 모양을 갖는 눈과 입의 경우에는 주로 가변 템플릿(Deformable Template)방법을 사용하여 특징을 추출하고, 비교적 다양한 모양을 갖는 눈썹, 얼굴 윤곽선 추출에는 스네이크(Snakes:Active Contour Model)를 이용하는 연구들이 이루어지고 있다. 본 논문에서는 이러한 기존의 연구와는 달리, 스네이크를 이용하여 적절한 파라미터의 선택과 에너지 함수의 정의에 의하여 눈과 입의 윤곽선 추출을 실험하였다. 실험 결과로 추출된 윤곽선이 획일적인 기하학적인 모양이 아니라 개인차에 따른 변형을 반영하고 있다.

현물 포트폴리오 및 선물을 이용한 CVaR 기반 ELS 헤징 방법

이경희 ( Kyunghee Lee ),임현철 ( Hyuncheul Lim ),최영수 ( Youngsoo Choi ) 한국파생상품학회(구 한국선물학회) 2016 선물연구 Vol.24 No.3

본 논문은 ELS(Equity Linked Security)시장의 대표적인 상품인 HSCEI를 포함한 두개의 지수 기반 조기상환 스텝다운(auto call step down)형 ELS에 내재된 헤징위험을 분석하고 현물 포트폴리오 및 선물을 이용한 CVaR(Conditional Value at Risk) 기반 헤징전략을 새롭게 제시한다. 스텝다운형 ELS 구조에 내재된 KI(Knock-In)특성으로 ELS 수익률분포가 비대칭적인 양봉(bimodal) 분포를 따르고 급락위험(shortfall risk)이 내재됨에 따라 국소적인 델타 헤징방법은 한계점이 있다. 아울러 항셍선물관련 잦은 롤오버 및 현·선물간의 가격괴리 문제와 과도한 항셍지수 기반 ELS 발행으로 선물 유동성 부족으로 선물을 이용한 헤징이 어렵다. 이런 문제를 해결하고자 Rockafellar and Uryasev(2002)와 Alexander, Coleman, and Li(2006)가 제안한 방식을 활용하여 1) 지수를 추적하는 현물 포트폴리오를 생성한후, 2) 현물 포트폴리오와 선물을 이용한 새로운 헤징전략을 제시한다. 실증분석 결과 첫째, CVaR 기반 지수추적 현물 포트폴리오가 시장비율(market ratio), 정보비율(information ratio), Sharpe Ratio을 이용한 평가지표에서 지수추적을 잘 하면서 급락위험(shortfall risk)이 적음을 알 수 있었고, 둘째, 현물 포트폴리오만을 이용한 헤징전략이 선물만을 이용한 헤징전략보다 우수함을 확인할 수 있었다. 정책적인 제안으로 지수 ELS 상품의 기초자산인 지수를 복제하는 ETF(Exchange Traded Fund)가 거래소에 상장된다면 다양한 상품 구조의 중위험·중수익 구조화 상품을 개발할 수 있을 뿐만 아니라 헤징도 원활하게 수행할 수 있을 것이다. In this paper, we analyze the hedging risk intrinsic in the auto call step down equity linked securities (ELS) based on two underlying indices including HSCEI, which are major products of the ELS market. And we also propose new hedging strategies based on Conditional Value at Risk (CVaR) using stocks portfolio and futures. Due to the non-symmetric bimodal distribution for return of ELS, which comes from the Knock-In (KI) property inherent in step down ELS structure, and inherent shortfall risk in the ELS structure, a local delta hedging strategy has a limit. In addition, hedging using futures are difficult because of 1) frequent roll-over related with HSCEI futures, 2) price difference between underlying index and futures and 3) lack of futures liquidity caused by excessive ELS issue based on HSCEI. As a way to manage these problems, this paper proposes new hedging strategies : First, construct stocks portfolio tracking index using method suggested by Rockafellar and Uryasev (2002), Alexander, Coleman and Li (2006). Second, do hedging by using this stocks portfolio and futures. This paper shows that 1) index-tracking stocks portfolio based on CVaR has a better performance and lower shortfall risk than index by comparing market ratio, information ratio and Sharpe Ratio, and 2) hedging using stocks portfolio is better than futures. As the policy proposals, if ETF, which tracks the underlying indices of ELS based on CVaR, is to be listed on the exchange (KRX), various kinds of product structures for mid-risk-mid-return structured products will be able to develop further, as well as offer more convenience with hedging.

한국 전통음악 역사 속의 여성 음악인들

이경희 ( Kyunghee Lee ) 한양대학교 음악연구소 2003 音樂論壇 Vol.17 No.-

Until recently the subject of this paper, "Female Musicians in the History of Korean Traditional Music" received little attention from the Korean scholars. Since the late 1990’s, native musicologists and philologists of the Korean and Chinese classics have done some important research on Korean female musicians. The author summarizes the previous researches and re-evaluate the role of traditional female musicians based on them. This paper focuses on the Choson dynasty (1392-1910) and is divided into three periods-the earliest one from the 15th to the 17th century, the middle one from the 18th to the 19th century, and the last from the early 20th century. It is during the Choson dynasty that the role of female musicians was effectively organized and fully used. After reviewing the history of female musicians in the Choson dynasty, we have discussed several aspects such as their education, patrons and repertoire. Finally we appraised the positive and negative aspects of the activities of female musicians. In sum, female musicians played various roles of successor, transmitter, mediator and patron in the history of Korean traditional music. However, these positive aspects of their activities were thoroughly ignored until recently. Since the colonization policy of Japan treated both Kisaeng and prostitute under the same law, Kisaeng gradually lost their pride as a traditional artist. The recognition by the common people of Kisaeng got worse until finally they thought the Kisaengs the same as prostitutes. The tradition of the original Choson Kisaeng disappeared. We should remember their contribution to the history of Korean traditional art including music. They were indeed bounded by social limitations and discrimination throughout the history. However, they did not merely surrender to it, but tried to overcome and make the best out of it. It is ironic that a large portion of traditional Korean art at present was handed down by female musicians who were one of the weakest minorities in traditional society. It is time to credit them for their role and indefatigable vitality in the history of traditional Korean art.

용기에서의 중금속 용출 변화에 대한 연구

이경희(KyungHee Lee),최달웅(DalWoong Choi) 고려대학교 보건과학연구소 2007 보건과학논집 Vol.33 No.1

For safety of processed food such as canned food, we need studies about heavy metal pollution that can be caused by the processed container as well as content of the heavy metals in the food itself. Although there are many studies about the content of heavy metals in food, those about heavy metal elution from a container are few. Here what is important is not only the elution during the distribution and preservation period of the processed food but also that during the food keeping period after opening. The metal corrosion can be promoted after opening more than in a closed canned status. Thus this study conducted an experiment about heavy metal elution of a can container when kept after opening. First of all, oil of canned tuna was collected after 3 weeks from opening. It was pretreated in a microwave and diluted in a proper concentration to measure a degree of heavy metal elution with ICP-MS, including content changes of major heavy metals such as aluminium(Al), chromium(Cr), nickel(Ni), copper(Cu), Zinc(Zn), Arsenic(As), selenium (Se), cadmium(Cd) and lead(Pb). There was no difference of content before and after opening for Al, Se and Pb. Ni and Cr were increased a little bit but had no statistically significance due to a big standard deviation. Heavy metal contents of Cu, Zn, As and Cd were reduced by opening but without a statistical significance. The 3-week period could not cause elution of heavy metal from can container in a statistically significant level. Ni and Cr had a possibility of elution in an insignificant level. Therefore a future study can find elution in a significant level by lengthening the opening period or increasing the number of samples. Also, food pollutants as well as heavy metal elution of agricultural and fishery canned food can be a good topic for future studies. Finally, possible research topics include mechanism about increase of decrease of heavy metal contents by long-term keeping after opening.

미국 무용치료 커리큘럼 분석을 통한 국내 무용치료 발전과제

이경희 ( Kyunghee Lee ) 대한무용학회 2019 대한무용학회논문집 Vol.77 No.5

The researcher thinks that it is meaningful to consider the contents of the curriculum for training dance therapists in Korea and whether the actual clinical practice and the close linkage process with institutions are working well. In that sense, I believe that this study needs to look at a systematic US dance therapy curriculum to identify the key perspectives that should be considered for the development of dance therapy. Cooperation with relevant departments within the university, operation of programs in connection with the community, and practical courses Internship-related subjects should be addressed intensively.