얼굴 특징점 추적 및 움직임 측정도구

이정희,이영희,차의영,Lee, Jeong-Hee,Lee, Young-Hee,Cha, Eui-Young 대한임베디드공학회 2011 대한임베디드공학회논문지 Vol.6 No.5

This paper proposes facial feature tracking based on modified ART2 neural networks. And we also suggest new measurement devices such as 'Persistence Exponent' and 'Moving Space Exponent' for the criterion of input vector which consists features. The proposed methods have been applied to classify 48 students by 2-class (ADHD positive, ADHD negative). The results of the experiment have shown that the proposed methods are effective for ADHD Behavior Pattern Classification based on the Image Processing.

직류전위차법 자료에 대한 통계적 자료분석

이정희,이우동,Lee, Jeong-Hee,Lee, Woo-Dong 한국데이터정보과학회 2010 한국데이터정보과학회지 Vol.21 No.1

비파괴검사방법 중 직류전위차법은 표면균열 측정에 유효한 수단으로 알려져 있다. 이차원 표면 균열을 가진 시험편에서 전류입출력점사이의 거리가 직류전위차에 미치는 영향을 알아보는 실험을 실시하여 자료를 얻었다. 이 자료로부터 전위차 값은 일정 전위차계측점사이의 거리에 있어 전류입출력점사이의 거리가 증가함에 따라 반비례적으로 감소하고, 노치의 길이에 비례하고 있었다. 이 실험에서 관찰된 자료를 통계적 모형에 적합시키고, 적합된 모형에서 전위차에 영향을 주는 유의한 변수를 알아보는 것은 비파괴검사에서 중요하다고 할 수 있다. 본 연구에서는 관찰된 자료를 적절하게 설명할 수 있는 통계적 모형을 제안하고, 제안된 모형에서 유의한 독립변수를 찾아보는 것이 목적이다. It was verified that the effect of the distance between current input point and output point on direct current potential drop (DCPD) in the material with two-dimensional surface notch. If the distance between potential drop measuring points was fixed at a certain distance, the potential drop was decreased with increasing the distance between current input and output points. DCPD technique was a useful method for surface crack sizing because the potential drop was proportional to the length of notch. In this paper, we suggest a statistical model to describe the data and want to find a significant variables to effect to potential drop. We use R program to analyze the data.

5·18 사적지 기념공원화 계획 - 국군광주병원과 505보안부대 옛터를 대상으로 -

이정희,윤영조,Lee, Jeong-Hee,Yun, Young-Jo 한국조경학회 2019 韓國造景學會誌 Vol.47 No.5

본 연구는 5.18민주화운동 이후 사적지로 지정되었던 국군광주병원과 505보안부대 옛터를 대상으로 역사적 사실을 바탕으로 한 시대적 특성을 공간설계 개념으로 설정해 기념공원화 계획안을 제시하였다. 광주광역시는 5.18사적지인 국군광주병원과 505보안부대 옛터를 5.18기념사업의 일환으로 공원화하고자 도시공원 조성계획을 수립하고, 역사에 대한 기억의 공간으로만 보존해왔던 대상지를 5.18민주화운동의 역사적 가치를 함양함과 동시에 시민 삶에 활력을 주는 공원으로 단계적 조성계획을 추진하고 있다. 결과적으로 5.18사적지의 공동체적 가치가 현대적으로 계승될 수 있도록 사회적 합의를 통해 단계별 계획, 조성과정의 틀을 설정하고, 상처의 치유, 역사의 기억을 담아내는 계획을 하고자 함이다. 계획안에서 사적지의 공원화와 관련된 선행연구 및 계획사례 분석을 통해 공간 활용을 위한 문제 해결적 접근방법을 제시하였고, 대상지가 갖고 있는 장소적 가치를 탐색함과 동시에 공원의 계획개념을 유지하면서 역사적 사실에 대한 시대적 특성을 담아내는 공간 활용 전략과 세부내용을 서술하였다. 연구의 결과로 국군광주병원 사적지는 5.18민주화운동을 통해 남겨진 상처에 대한 치유의 문제를 지역사회가 주체적으로 해결할 수 있도록 과거의 역사적 기억과 치유의 공원으로 계획하되, 기존 자연환경을 활용한 치유의 숲 개념을 제시하였고, 505보안부대 옛터 사적지는 5.18기억공동체의 확장과 지속성을 강화하는 측면에서 미래 세대인 어린이와 청소년이 공감할 수 있는 역사 체험 배움의 공간개념으로 계획하였다. 사적지를 활용한 기념공원화 계획은 계획 단계에서 시민, 관련단체, 전문가를 아우르는 사회적 공감대의 형성이 선결요건으로 작용하며, 장소성 재현을 위한 구성원들의 사회적 합의가 공간활용 방향 설정에 중요한 계획적 요소로 작용할 수 있다. 본 연구를 통해 5.18사적지에 역사적 가치를 담는 기념공원으로 환원하는 데 기여하고, 과거 역사에 대한 상처와 기억을 치유하는 장소를 넘어 도시와 시민의 삶에 활력을 주며, 미래 세대와의 공유할 수 있는 방향성을 제시한 것에 대한 의의가 있다. This study presents a plan for a memorial park that respects the characteristics based on the historical facts for the concept of space of the Gwangju Hospital of Korea Army and the location of the 505 Security Forces, which were designated as historic sites after the 5-18 Democratization Movement. The Gwangju Metropolitan City as it is the location of the 5-18 historic sites, is taking part in the 5-18 Memorial Project, and plans to establish a city park recognizing the historic site of the 5-18 Democratization Movement, which has been preserved only as a memory space to this point. The park is promoting a phased development plan. This study suggests that the 5-18 historic sites can be modernized and that social consensus can establish the framework of the step-by-step planning and composition process to ensure the plans for the space heals wounds while preserving the history. In this paper, we propose a solution to a problem. We solve the approach for space utilization through an analysis of precedent research and planning cases related to park planning at historical sites. In addition to exploring the value of the site, we also describe the space utilization strategy that covers the historical characteristics and facts while maintaining the concept of park planning. As a result of the research, the historic site of the Gwangju Hospital of Korea Army is planned as a park of historical memory and healing in order to solve the problems left behind by the 5-18 Democratization Movement. The historic site of the 505 Security Forces was selected as an area for historical experiences and a place for learning that can be sympathized with by future generations of children and adolescents in terms of expanding and sustaining the memory of the 5-18 Democratization Movement. In the planning stage, the historical sites suggested the direction of space utilization for representation as did the social consensus of citizens, related groups, and specialists. Through this study, we will contribute to construction of a memorial park containing historical values in from 5-18 historic sites. It is meaningful to suggest a direction that can revitalize the life of the city as well as its citizen and can share with the history with future generations beyond being a place to heal wounds and keep alive the memory of the past.

국내 쯔쯔가무시증의 감염자 분포와 유병자수 추정

이정희,박정수,Lee, Jung-Hee,Murshed, Sharwar,Park, Jeong-Soo 한국데이터정보과학회 2009 한국데이터정보과학회지 Vol.20 No.1

쯔쯔가무시증은 가을철 유행성 출혈열 중 80%이상을 차지하는 질병으로 1주에서 2주의 잠복기를 가지는 것으로 알려져 있다. 우리는 그 잠복기간의 확률분포가 감마분포라 가정하고 후향연산식을 이용하여, ${\hat{\mu}}=309.92$$, ${\hat{\sigma}}=14.154$인 정규분포를 따르는 감염자 분포를 추정하였다. 감염자는 10월에 집중적으로 분포하는 것으로 나타났다. 이러한 감염자 분포형태는 발병자 수가 11월동안 급격하게 증가하는 것에 기인한다. 본 연구에서 추정한 감염확률에 의해 미래의 유병자수를 계산한 결과 최대 1200명이었고 이는 매년 증가하는 발병자 수의 경향을 반영하지 못한 한계가 있다. 또한 우리는 전염병 모형으로 잘 알려져 있고 전염발전 단계간의 상호작용을 고려하는 SIRS 모형을 적용해 보았다. 모수는 초기값으로부터 잘 근사되어 수렴하는 값으로 추정하였다. Tsutsugamushi fever occupies more than 80% of total fall epidemic diseases and has an incubation period of 1 or 2 weeks as well. We have assumed that the incubation period distribution is gamma and therefore, reach an agreement that the infected distribution is normal with ${\hat{\mu}}=309.92$, ${\hat{\sigma}}=14.154$ by back calculation method. The infection cases are found severely large around the month of October. The infection case distribution demonstrates the incidence number increasing rapidly and progresses fast during the month of November. In this study, we have calculated the future prevalence number of maximum 1,200 people by inferred infection probability and incubation period distribution with some sort of limitation that the trend of increasing incidence number is not taking into an account. We considered the SIRS model which is also known as epidemic model, familiar to interaction between epidemiological classes. Our estimated parameters converged well with the initial parameter values.

HCI 이론에 기반한 게임형 학습 프로그램 평가 준거 개발 및 적용

이정희,이재무,Lee, Jeong-Hee,Lee, Jae-Mu 한국정보교육학회 2007 정보교육학회논문지 Vol.11 No.1

The purpose of this study is to develope a criterion for evaluation on game-type learning programs by the application of HCI(Human Computer Interaction) theory. And to analyze game-type learning programs for elementary students on the criterion developed in this study. The HCI theory, which deals with principles or methods for developing systems people can use conveniently and pleasantly, has been applied to overall area of program development. And it also has been widely used to evaluate learning programs. However, there have been few studies on a game-type learning program evaluation on the basis of the HCI theory. This paper shows that evaluation criteria are developed on three viewpoint bases : usefulness, usability, and affect which are as elements in HCI. And analyzes the game-type learning programs from these three points of view. The evaluation criteria developed in this study can be applied to a basis for evaluation on game-type learning programs, and the analysis will be able to be a useful guide to game programers as well as its users.

교류전위차법에 의한 강자성체의 응력확대계수 결정

이정희,Lee, Jeong-Hee 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.9

In order to determine the Mode I stress intensity factor ($K_1$) experimentally by means of the alternating current potential drop(ACPD) technique, the change in potential drop due to load for a ferromagnetic material containing a two-dimensional surface crack was examined. The cause of the change in potential drop and the effect of the magnetic flux on the change in potential drop were clarified by using the measuring systems with and without removing the magnetic flux from the circumference of the specimen. To remove the magnetic flux, a new measuring system was made by utilizing the characteristic of coaxial transmission line. The change in potential drop in the case without magnetic flux in the air was caused by the change in electromagnetic properties near the crack tip due to magnetization. The relationship between the change in potential drop and the change in $K_I$ was linealized by demagnetization and was found to be independent of the crack length.

WAVESTAR형 파력발전장치의 유압식 2차변환장치의 물리모델 구축에 관한 연구

이정희,오재원,하윤진,박지용,천호정,김경환,Lee, Jung-Hee,Oh, Jaewon,Ha, Yoon-Jin,Park, Ji-Yong,Cheon, Ho-Jeong,Kim, Kyong-Hwan 한국산업융합학회 2020 한국산업융합학회 논문집 Vol.23 No.6

This study was conducted to develop an efficiency prediction program of a hydraulic secondary energy converter for calculating annual power generation of a Wavestar type wave power generator. Using the period and wave height obtained from the frequency domain analysis, the behavior of the floating body was obtained by assuming the sin function. The piston displacement and speed of the hydraulic cylinder were calculated considering the behavior of the floating body and the shape of the mechanism. The numerical simulation of the hydraulic system was performed by physically modeling the hydraulic cylinders, check valves, hydraulic motors, which are the main devices. In the future, this analysis program will be used to develop a program for estimating annual power generation of a moveable body type wave power generation device.

과학일지 쓰기가 과학영재의 인지적 ${\cdot}$ 정의적 특성에 미치는 영향

이정희,우규환,Lee, Jeong-Hee,Woo, Kyu-Hwan 한국영재학회 2004 영재교육연구 Vol.14 No.4

본 연구의 목적은 과학일지 쓰기 활동이 과학영재의 인지적 ${\cdot}$ 정의적 특성에 미치는 영향을 알아보기 위한 것으로 대학 부설 영재교육원 소속 과학영재 21명을 대상으로 6 개월간 온라인으로 과학일지를 쓰게 하고 분석하였다. 연구 결과 과학일지에서 글쓰기 형식에 따라 과학개념이 드러나는 양상과 함께 과학영재의 심리 ${\cdot}$ 행동적 특성이 정적 양상과 부적 양상을 보이고 있다는 것을 알 수 있었다. 또한 과학일지 쓰기는 인지적 측면에서 과학영재의 과학개념에 대한 이해와 탐구력을 향상시키며, 정의적 측면에서 관찰력이나 과학에 대한 흥미와 태도 및 글쓰기에 대한 태도를 향상시킨다. 따라서 과학일지 쓰기는 과학영재의 인지적 ${\cdot}$ 정의적 특성에 긍정적인 영향을 준다는 것을 알 수 있다. 또한 과학영재는 과학일지 쓰기가 매우 유익하며 영재교육 프로그램으로도 적합하다고 인식하고 있어, 이러한 결과는 과학일지 쓰기 활동이 영재교육 프로그램으로 활용 될 수 있다는 것을 의미한다. The purpose of this study is to find out the effect of science journal writings on the cognitive and affective features of the science gifted students. In this research, the tasks of on-line science journal writings were assigned for 6 months and the subjects in this study were 21 students of Chemistry Division of the Center for Science Gifted Education, Seoul National University. Consequently in science journals, science concepts are found in various aspects according to the writing formats, and psychological and behavioral characteristics of the science-gifted are revealed in positive or negative aspects. In cognitive prospect, science journal writing equips students with better understanding about science concepts and scientific research. In affective prospect, science journal writing help students improve observation and attitude toward science as wren as writing skills. Accordingly, science journal writing has positive effect on cognitive and affective characteristics of the science-gifted. In conclusion, acknowledged by most of science-gifted students as both beneficial and appropriate in their education program, science journal writing should be emphasized in education for science-gifted students.

백서의 아킬레스 건 봉합 후 Hyaluronate-Carboxymethyl cellulose가 조직 유착에 미치는 영향

이정희,정비오,김교영,Lee, Jung-Hee,Jeong, Bi-O,Kim, Gou-Young 대한족부족관절학회 2009 대한족부족관절학회지 Vol.13 No.1

Purpose: The purpose of this study was to evaluate the effect of Sodium hyaluronate-Sodium carboxymethyl cellulose (HA-CMC) on tissue adhesion after tenorrhapy in tenotomized Achilles tendon of the Sprague-Dawley rat. Materials and Methods: Twenty-eight legs of 14 Sprague-Dawley rat were used in study. After tenotomy of the Achilles tendons, tenorrhaphies were performed. Simple tenorrhaphy without any other procedures were performed on the left Achilles tendons (control group), and additional HA-CMC injections were done prior to the tenorrhaphy on the right Achilles tendons (HA-CMC group). Gross and histological examinations were made to identify differences between the two groups, 1, 2, 6, 8, 10, 12 and 14 weeks respectively. Results: Distinct decrease in granulation tissues and adhesions were seen in the HA-CMC group during gross inspection at 6 and 8 week after the operation. On histological analysis of the HA-CMC group, although increased infiltrations of inflammation cells were observed during 1 week, less adhesion were seen at 6, 8 and 10 weeks after the operation. In HA-CMC group, superior healing processes were seen at 6, 8 and 10 weeks and less fibrotic changes, compared to control group, were seen at 2 and 6 weeks. Conclusion: Prevention of adjacent tissue adhesion was made possible through decrease in collagen deposition and fibrosis by injecting HA-CMC before tenorrhaphy of Achilles tendon. Also, histologically faster healing process of the collagen fibers within the Achilles tendon was observed.

In-situ 성장법에 의한 ZIF-8 분리막 합성 및 H₂/CO₂ 분리 특성

이정희,유성종,김진수,Lee, Jeong Hee,Yoo, Sung Jong,Kim, Jinsoo 한국막학회 2018 멤브레인 Vol.28 No.2

ZIFs (Zeolitic imdazolate frameworks)은 높은 화학적 열적 안정성, 높은 비표면적과 조절 가능한 기공구조로 최근 분리막 소재로 큰 관심을 받고 있다. 본 연구에서는 두 가지 종류의 다공성 지지체(${\alpha}$-alumina 및 YSZ)를 사용하여 in situ 성장법으로 ZIF-8 분리막을 합성하고, $H_2/CO_2$ 기체 투과 특성을 조사하였다. 결함 없는 ZIF-8층을 합성하는데 있어, 기공이 작은 YSZ 지지체는 ${\alpha}$-alumina 지지체 보다 더 적은 시간이 요구되었다. 합성시간이 3 h인 경우, ${\alpha}$-alumina 및 YSZ 지지체위에 형성된 ZIF-8 분리막은 약 10 정도의 $H_2/CO_2$ 선택도를 보였다. ZIFs (Zeolitic imdazolate frameworks) have attracted great attention as membrane materials in recent years due to their high chemical and thermal stability, high specific surface area and adjustable pore structure. In this study, ZIF-8 membranes were synthesized by in-situ growth method on two different support materials (${\alpha}$-alumina and YSZ) and their $H_2/CO_2$ gas permeation characteristics were investigated. In order to synthesize defect-free ZIF-8 layer, YSZ support required less synthesis time than ${\alpha}$-alumina support due to smaller pore size. After in-situ growth for 3 h, ZIF-8 membranes prepared on both YSZ and ${\alpha}$-alumina supports showed $H_2/CO_2$ selectivity of about 10.