韓國農業의 問題點 : 한국농업의 문제점

이희정 釜山大學校 商科大學 1956 釜山商大學報 : 부산대 Vol.2 No.2

『인푸레이숀』下에 있어서 企業會計의 實態 : 『인푸레이숀』하에 있어서 기업회계의 실태

이희정 釜山大學校 商科大學 1957 釜山商大學報 : 부산대 Vol.3 No.1

Originalite des Contes de Marcel Ayme

이희정 한국불어불문학회 1985 佛語佛文學硏究 Vol.20 No.1

RSA 안전성과 Coppersmith 정리

이희정,Lee, Hui-Jeong 한국수학사학회 2007 Journal for history of mathematics Vol.20 No.1

1997년 Coppersmith는 소인수분해를 모르는 법 N에 대한 합동방정식(modular equation)의 '작은 해'를 찾는 방법을 제안한다. 동시에 두 변수 다항식의 제한된 크기의 해를 찾는 방법도 격자이론을 이용하여 제안한다. 이러한 Coppersmith의 정리는 이후 암호학에서 매우 유용하게 사용되는데 특별히 RSA 암호체계에서 비밀 키를 찾아내거나 일부 비밀 키가 노출되었을 때 전체키를 복원하는 데에 중요한 역할을 한다. 본 논문에서는 Coppersmith의 정리를 살펴보고 이것이 RSA의 안전성에 어떠한 영향을 주었는지를 살펴본다.

Bi-plane 뇌혈관 전용장치에서 저선량 투시의 유용성 : 방사선 선량을 중심으로

이희정,김태일,김태형,오제선 대한인터벤션영상기술학회 2011 대한인터벤션영상기술학회지 Vol.14 No.1

Purpose: To evaluate the efficacy of low-dose fluoroscopicexamination for reduce radiation dose in the bi-plane angiography equipment. Materials and Methods: We used glass dosimeter and RANDO phantom to measurethe radiation dose. The surface organ absorbed dose(SOAD) of the phantom was measured at the brain, thyroid, middle forehead, and left external auditory meatus, respectively. The air scattered dose(ASD) was measured four points at 75 ㎝-distance and two points at 150 ㎝-distance from the detector. We evaluated the reduced rate of SOAD and ASD when normal fluoroscopy versus low-dose fluoroscopy and the reduced rate of SOAD when single fluoroscopy versus RoadMaP condition. Results: The reduced rate of SOAD under low-dose fluoroscopy was 43.1%, 43.6%, 54.2%, and 50.4% at the brain, thyroid, middle forehead, and left external auditory meatus, respectively. The reduced rate of ASD was 49.5% at 75 ㎝-distance and 44.6% at 150 ㎝-distance from the detector(p<0.05). The increased rate of SOAD under RoadMaP condition was 28.3%, 8.8%, and 11.3% at the thyroid, middle forehead, and left external auditory meatus, respectively. The radiation dose at the brain reduced 28.5% (p>0.05). Conclusion: The low-dose fluoroscopic examination seems to be useful technique for reduce radiation dose in the bi-plane angiography equipment.

페이퍼 커트 아웃 기법을 활용한 헤어일러스트레이션 연구

이희정,이순재 한국일러스아트학회 2018 조형미디어학 Vol.21 No.1

Hair illustrations are artistically changing with much broader aspects beyond its simple functional purpose for hair style designs. They are widely used and developed in various information media and art fields, and to keep pace with changes of the times, hair illustrations require new techniques through which they can express formative and unique artistry beyond simple expressions. Thus, by examining hair illustration works made through paper cut-out technique, this study aims to expand the domain of hair illustration expression techniques. Particularly, this study theoretically considered hair illustrations through literature review and produced hair illustration works based on the results. As for theoretical backgrounds, this study classified hair illustrations by characteristics and examined paper cut-out as a technique used to produce creative artworks. As for the work production, this study adopted a technique good enough to maximize the cubic effect with light-and-shade contrast and lighting out of all the paper cut-out techniques when producing 4 pieces of hair illustration works. Besides, this study made face & hair diagrams by using geometric and simplified forms and repeated design elements, and then engraved parts that were intended to contrast and emphasize. Overall, with a new expression method through paper cut-out technique developed for hair illustrations, this study has significance in enhancing the applicability and value of hair illustrations by creating a new formative world with this creative and original technique for hair illustrations. 헤어일러스트레이션은 헤어스타일디자인을 위한 단순한 기능적 의미에서 폭넓은 의미로의 예술적 변화를 시도하고 있다. 각종 정보매체와 다양한 예술영역에서 활용되며 발전해 나가고 있으며, 시대의 변화에 따라 단순한 표현으로써의 헤어일러스트레이션만이 아닌 조형적이며 독특한 예술성을 표현할 수 있는 새로운 기법이 요구되고 있다. 이에 페이퍼 커트 아웃 기법을 활용한 헤어일러스트레이션 작품을 연구하여 헤어일러스트레이션 표현 기법의 영역을 확대하는데 목적이 있다. 본 연구는 문헌조사에 의한 이론적 고찰과 그것을 토대로 한 작품을 제작하였다. 이론적 배경으로는 헤어일러스트레이션을 각 특성에 따라 분류하고 창의적 예술작품 제작을 위한 기법으로 페이퍼 커트 아웃을 살펴보았다. 작품 제작은 페이퍼 커트 아웃 기법 중 명암의 대비와 조명에 의한 입체감을 극대화시킬 수 있는 기법을 사용하여 4점의 작품을 제작하였다. 얼굴과 헤어를 기하학적이며 단순화된 형태와 반복된 디자인 요소를 활용하여 도안을 만들고 대비와 강조하고자 하는 곳을 투각하였다. 본 연구 결과 헤어일러스트레이션을 페이퍼 커트 아웃 기법을 통해 새로운 표현 방법을 개발함으로써 헤어일러스트레이션의 독창적이며 창의적 기법으로 새로운 조형세계를 만들어 예술작품으로써의 가능성과 가치를 높이는데 의의가 있다.

Bringing the concept of “Psychic Distance” in attracting Korea tourists to Australia -Implications for Destination Marketing of Australia-

이희정,남솔아 한국전시산업융합연구원 2017 한국과학예술융합학회 Vol.28 No.-

Having considered the fact that the annual growth of Korean tourists travelling Australia is unsteady while that of travelling overseas is steady, it is believed that a new marketing approach will be helpful to encourage Korean tourists to travel Australia among other competing international destinations. This paper brings the concept of psychic distance and empirically shows the significant role of psychological distance in attracting Korean tourists to Australia. Using online panel survey, a total of 334 cases were analyzed for this study. The factor analysis identified the underlying components consisting of psychic distance towards Australia based on Korean tourists' perspectives; familiarity, infrastructure, cultural understandings, and favorable impression. This research also found that three out of the four components play a significant role in Korean tourists' intention to visit Australia. The factors including 'favorable impression', 'infrastructure', and 'cultural understandings' influenced Korean tourists’ intention to travel to Australia. Among them, the component of ‘favorable impression’ was the most powerful factor that increases the level of intention to visit. The result of this paper can contribute to building up a new marketing approach by which more Koreans are engaged to visit Australia in the future.

코로나19 대응에 대한 문화사회학적 고찰: 역학조사정보 관리제도를 중심으로

이희정 한국사회학회 2022 한국사회학회 사회학대회 논문집 Vol.2022 No.12

6년제 약대 학제시스템 만족도에 영향을 미치는 요인 분석 및 향후 전략

이희정,심미경,하정은,김현아,문홍섭,곽혜선,최경업 한국임상약학회 2014 한국임상약학회지 Vol.24 No.4

Background: The pharmacy education system in South Korea has changed from four-year degree program to two-yearpre-pharmacy program plus four-year professional degree program (a total of six years) since 2009. Objectives: The purposeof this study is to assess final year student’s satisfaction on this new pharmacy education system and to explore factorsrelated to student satisfaction. Methods: A paper-and-pencil survey instrument was administered to all final yearpharmacy students at four universities located in South Korea during September of 2014. The self-administered questionnairecontained 39 items. In part 1, the quality of education with regards to school utilities, education system, humanresources, and communication domains were measured. In part 2, overall satisfactions with the new education systemwere asked to students. Responses were recorded on a seven point Likert scale. Results: A total of 207 students wereparticipated in this study. Students showed low satisfaction on school utilities and standardization of education while theydisplayed high level of satisfaction on the quality of the faculty members and preceptors at clerkship sites. Factor analysisshowed that education service was the most significant factor that affects students’ satisfaction followed by facilities,standardized education, communication, administration, pharmacy practice (p<0.05). Conclusion: The qualification of facultyand preceptors ranked number one in students’ satisfaction and it was the most significant factor. School facilitieswere found to be the second most significant factor in students’ satisfaction while students displayed poor satisfaction. The study results might need to be reflected in future education planning to improve students’ satisfaction.

주기적 분극 반전된 KTiOPO4 결정에서 자발 매개 하향변환 광원을 이용한 고스트 이미징

이희정,이그림,김헌오,문한섭 한국물리학회 2013 새물리 Vol.63 No.7

We investigated ghost imaging by using the signal and idler photon pairs generated from spontaneous parametric down conversion (SPDC) in type-II periodically-poled KTiOPO4 (PPKTP). To obtain the ghost images by using SPDC photon pairs, we measured the spatial properties of the SPDC photon pairs under the collinear condition. The crystal temperature under the collinear condition is 85 C. The object beam (idler photon) moves into an image target and passes through a convex lens in front of a fixed detector. The reference beam (signal photon) passes through a polarizing beam splitter and is captured by a detector which scans the transverse plane. As a result, we can get the target image through coincidence counting between the fixed and the moving detector. 본 연구에서는 type-II PPKTP (periodically poled KTiOPO4) 결정으로자발 매개 하향변환 (SPDC) 과정에서 생성되는 광자 쌍 (시그널과아이들러) 의 높은 상관관계를 이용하여 고스트 이미지를 관측하였다. 그리고 고스트 이미지 측정에 최적화된 SPDC 광자 쌍의 공간분포를 얻기위해서 PPKTP 결정의 온도에 따른 시그널 (signal) 과 아이들러 (idler)의 공간적인 분포와 동시 계수의 공간 분포를 단일 광자 검출기를이용하여 측정하였다. 아이들러 광자가 지나는 경로에 이미지가 있는타겟을 넣고 시그널 광자가 지나는 경로에 설치된 평면 스캔 단일 광자검출기로 공간 분포에 대한 동시 계수 측정을 하였을 때, 아이들러에설치된 타겟의 고스트 이미지를 얻을 수 있었다.