멀티미디어 상연그래프 질의언어와 대수를 이용한 질의처리방법

이태경(Tae-kyong Lee) 한국정보과학회 2000 정보과학회논문지 : 데이타베이스 Vol.27 No.2

최근 폭발적인 증가를 보이고 있는 멀티미디어 자료의 양과 그 자료들을 이용할 수 있는 하드웨어의 발전은 멀티미디어 상연물을 이용하는 여러 응용 분야에 대한 관심을 촉발시키고 있다. 이에 멀티미디어 상연물의 효과적인 이용을 위해서는 멀티미디어 상연물과 DBMS와의 통합이 필요하다. 이 논문에서는 내용(content)에 근거한 상연물 검색과 검색 처리 기술의 문제를 다룬다. 현재 멀티미디어 상연물 제작 도구(authoring tool)들은 멀티미디어 상연물을 상연 그래프(presentation graph)를 이용하여 표현하고 있으며 상연 그래프는 DAG(directed acyclic graph)이다. 각 노드는 같은 타입의 미디어 스트림을 나타내며 에지는 스트림간의 상연 순서와 동기화(synchronization) 방법을 나타낸다. 각각의 스트림에 포함된 정보, 이 정보들간의 순서, 그리고 스트림간의 상연 순서는 상연의 내용을 구성한다. GCalculus/S(GCalculus with Set Operators)는 calculus에 바탕을 둔 검색언어이며 멀티미디어 자료들의 물리적 특징과 내용을 다룰 수 있다. 개개의 노드 안에서의 정보의 변화와 노드 사이의 순서는 시간 연산자(temporal operator) Next, Connected, Until을 이용하여 표현한다. 검색의 처리를 위하여 객체 대수(object algebra)인 O-Algebra를 확장한다. Recently the technological advance in the hardware dealing with multimedia data as well as the explosive increase of the volume of multimedia data bring about new interest in the use of multimedia presentations in many application domains. To use multimedia presentations efficiently, the integration of multimedia presentations into DBMS is necessary. This paper presents a multimedia presentatation query language based on contents and query processing techniques. Presently, multimedia presentation authoring tools denote a multimedia presentation using a presentation graph which is a DAG. A Node in the graph is a same type of media stream and edges denote a play-out order and a synchronization way among nodes. The contents of presentations graphs are the information of each stream, the sequential order of the information inside each stream and the play-out order among the streams. GCalculus/S is a calculus-based query language and can deal with the contents of a presentation graph and physical characteristics of multimedia data. It expresses the sequential order of information inside each stream and the play-out order of streams of a presentation graph using temporal operators Next, Connected and Until. O-Algebra, which is object algebra, is extended to process GCalculus/S queries.

전통 음료의 한의학적고찰(韓醫學的考察)

이태경 ( Tae Kyong Lee ),김경신 ( Kyoung Shin Kim ),김병수 ( Byoung Soo Kim ) 대전대학교 한의학연구소 2013 혜화의학회지 Vol.21 No.2

The review of the literature had been done to investigate the mechanism of the herbal medicines contained in traditional Korean medical books. We had thought the results could provide the theoretical basis of adding herbal medicies to functional drink. This study is a document research in cluding a historical review of traditional beverages from after the period of the Joseon Dynasty, analysis of the characteristics of tradition the herbal medicine of the Joseon entered the new stage at the era of King Sejong. In the reign of Sejong, there had been a noticeable increase in kinds of herbs. Besides understanding the quality of herbs by provinces, the Joseon government also had pushed ahead with increase policy of herbs. The more the standard of living and incomes have increased, the more the concern of our health has been raised. This social phenomenon has affected on the food& beverage industry. The food& beverage industry of Korea has been already reorganized like the ones in developed countries in the early 21st century. Consumers are particular choosing their beverages; they concern their health, convenience, and taste more than ever. We had selected several herbal medicines contained in functional drink, and investigated the mechanism in field of oriental medicine and pharmacology.

모바일기기의 가속도센서를 이용한 사용자인증

이태경(Tae Kyong Lee),김준형(Jun Hyoung Kim),임을규(Eul Gyu Im) 한국정보과학회 2016 한국정보과학회 학술발표논문집 Vol.2016 No.6

신뢰할 수 있는 공간에서 생체인식기반의 모바일 애플리케이션 사용자인증 기법

이태경(Tae Kyong Lee),김용혁(Yong Hyuk Kim),임을규(Eul Gyu Im) 한국정보보호학회 2017 정보보호학회논문지 Vol.27 No.2

모바일기기를 이용한 서비스가 증가함에 따라 개인정보 노출과 같은 보안위협이 증가하고 있다. 이러한 문제점을 해결하기 위해 생체정보와 같은 추가 인증을 통해 서비스의 안전성을 강화하기 위한 연구가 진행 중이다. 본 논문에서는 보안 강화연구의 목적으로 모바일 기기에서 활용할 수 있는 위치기반 사용자인증 시스템을 제안한다. 제안하는 위치기반 사용자인증 방식은 두 단계의 인증절차를 수행한다. 첫 번째 인증은 위치 인증으로써 현재 사용자가 애플리케이션을 신뢰할 수 있는 공간에서 접근하는지 확인하는 것이다. 이 때 사용하는 인증방식은 모바일 기기 주변의 Access Point 정보를 이용하는 위치기반 인증방식이다. 두 번째 인증은 신뢰할 수 있는 공간 인증을 통해 해당 공간에 대한 정상사용자를 확인하는 것이다. 이 방식은 사용자 생체정보를 기반으로 사용자인증을 수행한다. 제안한 인증시스템은 사용자가 신뢰할 수 있는 공간에서 개인의 생체정보를 입력함으로써 사용자 개인정보 노출의 위험도가 낮은 장점이 존재한다. As services using mobile devices increase, exposure of personal information, and secure threats increase. In this paper, we propose a location-based user authentication system used in mobile device for tightening security. Our authentication system is performed to authenticate two steps. The first authentication is location authentication to ensure that the user accesses an application in trustable space. This authentication method uses an Access Point"s information. The second authentication is trustable space authentication to confirm the normal user. This method is carried out the authentication by using biometric information from the user.

Efficient Evaluation of Path Algebra Expressions

Tae-kyong Lee(이태경) 한국산업정보학회 2000 한국산업정보학회논문지 Vol.5 No.1

해상풍력발전의 HSE 관리를 위한 모델기반 HSE 위험성 평가 모듈 개발 및 평가

김성래,남건우,이태경,강대영,김준영,Seong Rae Kim,Keon Woo Nam,Tae Kyong Lee,Dae Young Kang,Joon Young Kim 한국시스템엔지니어링학회 2023 시스템엔지니어링학술지 Vol.19 No.2

This study provides an in-depth comparison and analysis of various risk assessment models widely used in modern industries, and proposes the most suitable model for risk assessment of offshore wind power in Korea. The assessment models were selected by considering various factors such as the purpose of risk assessment, stakeholder requirements, and characteristics of offshore wind power. We also emphasized the importance of using different risk assessment models in combination in situations of high uncertainty. To systematize the combination of risk assessment models, we used systems engineering which is effective to develop a new system. Systems engineering was used to define the complete, traceable functions from site requirements, and model-based systems engineering was used to manage the design information from requirements to detailed functions in a single model. The developed risk assessment module provide automatic conversion between risk assessment models to enable risk assessment suitable for offshore wind power. The functionality and usability of the offshore wind risk assessment module were verified by the evaluation of three wind power experts.

교사들의 아이디어 융합 과정에서 나타나는 교역지대의 진화과정탐색: 자율적 학습공동체 “STEAM 교사 연구회” 사례연구

이준기 ( Jun Ki Lee ),이태경 ( Tae Kyong Lee ),하민수 ( Minsu Ha ) 한국과학교육학회 2013 한국과학교육학회지 Vol.33 No.5

The purpose of this study is to identify the formation and evolution patterns of a trading zone and to explore the difficulties teachers experience in the trading zone and their perceptions of the experience. Seven teachers involved in the ``STEAM Teacher Community`` in a middle school located in the southern part of South Korea participated in this study. Participant observation and in-depth interviews were carried out, and reflective essays were collected for analysis. The results show that teachers successfully fanned a trading zone to share their expertise when they developed teaching materials for the convergence of different subject matters. Moreover, such a trading zone evolved in the order of pre-trading zone, trading zone under elite control, trading zone with boundary object, and trading zone of shared mental model. The difficulties teachers experienced in the trading zone were categorized under the difference of culture and opinion across subject matters, the lack of motivation for convergence, the hegemony of convergence and far-fetched factors for convergence, and difficulty of communication due to jargons. Also teachers in this study experienced perceptual changes in the trading zone. The trading zone model drawn from the results of this study bring forth implications for voluntary teachers` learning community activity for the convergence of different subject matters.

시스템엔지니어링 기반 산업 폐열 발전시스템 경제성 분석 모듈 설계

김준영,차재민,박성호,신중욱,이태경,Kim, Joon Young,Cha, Jae Min,Park, Sung Ho,Shin, Jung Uk,Lee, Tae Kyong 한국시스템엔지니어링학회 2018 시스템엔지니어링학술지 Vol.14 No.1

In the energy-guzzling industries such as steel making and cement, power plants utilizing waste heat have been attracting attention to increase energy efficiency. However, the existing economic analysis system doesn't consider the special working fluids and the cost models of the main equipment used in the waste heat recovery power plant. So it is difficult to estimate the plant economics accurately. Therefore, It is required to develop a economic analysis module that can more accurately evaluate for the power plant. In this study, the systems engineering approach was used to design and develop the module that systematically reflects the characteristics of the power plant and various requirements. Specifically, first, the special working fluids and main equipment applied to the power plant were investigated. Next, the cost models for each equipment were developed. Finally, the economic analysis module based on this was developed.

자동차 패밀리 룩에 관한 연구

박양옥(Park Yang-ok),이태경(Lee Tae-Kyong) 한국디자인학회 2007 디자인학연구 Vol.20 No.5

중등학생들이 생각하는 융합인재에 대한 이미지 유형 탐색

이준기 ( Jun Ki Lee ),이태경 ( Tae Kyong Lee ),신세인 ( Se In Shin ),정덕호 ( Duk Ho Chung ),오상욱 ( Sang Wook Oh ) 한국과학교육학회 2013 한국과학교육학회지 Vol.33 No.7

이 연구의 목적은 중등학생들의 융합인재에 대한이미지는 어떤 유형으로 형성되어있는지 알아보고, 융합인재교육(STEAM)을 경험한 학생과 그렇지 못한 학생들 간에 융합인재 이미지 유형에 있어 어떠한 차이가 나타나는지 파악하는 것이다. 연구목적의 달성을 위하여 남부권 소재 중등학생 187명이 이 연구에 참여하였으며, 이들로 하여금 자신이 생각하는 융합인재에 대해 그림을 그리고 간략한 설명을 적도록 하였다. 이렇게 수집된 자료를 귀납적으로 범주화하여 중등학생들의”융합” 및 “융합인재”에 대한 인식을 탐색적으로 알아보았다. 그 결과, 중등학생들의 융합에 대한 인식은 크게 “개인인지과정으로서의 융합”, “ 집단인지과정으로서의 융합”, “산물로서의 융합”으로 크게 범주화되었다. 융합인재에 대한 이미지는 “개인인지과정으로서의 융합”의 하위유형으로 “두뇌수준 사고융합형”, “누구나 아는 유명 인사형”, “생활의 달인형”, “다양한 직업인형”, “문제해결자형”, “창조적 개발자형”, “실존하지 않는 이상적 인간형”이 있었으며, “집단인지과정으로서의 융합”의 하위단계로는 ”전문가 집단형”과 “학생 집단형”이 있었고, “산물로서의 융합”의 하위단계에는 “단순 융합체형”이 나타났다. 중등학생들은 융합인재교육의 경험유무에 따라서 서로 다른 유형의 이미지가 형성되고 있음을 확인할 수 있었다. This study aims to identify the image types of secondary school students` perception about the talented person in convergence and to find the differences in drawing images of the talented person in convergence among the students who have taken STEAM class and the ones who haven`t. One hundred and eighty seven students in middle and high schools located in the southern part of South Korea participated in this study and they were asked to draw a picture of the talented person in convergence with a brief explanation. Based on students` pictures, researchers categorized their perception about convergence and talented person in convergence by using an inductive method. The result indicated that secondary school students` perceptions were categorized into convergence as individual cognitive processing and collective cognitive processing and convergence as outcomes. The image of the convergence in a talented person leaning toward individual cognitive processing was divided into the following seven types: idea banker type, various talented celebrity type, multi-tasking master type, multi-talented career type, active problem-solver type, creative developer type, and unrealistic ideal man type. Another image of collective cognitive processing was split into expert group type and interactive-mates group type. The other image was transformer type which is the subcategory of convergence as outcomes. From this study, it can be suggested that secondary school students express the various images of the talented person in convergence depending on experiencing STEAM or not.