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이용환(Lee, Yong-hwan),유영중(Yoo, Young-joong) 글로벌경영학회 2012 글로벌경영학회 학술대회 발표논문집 Vol.2012 No.1
본 연구는 주가변동성에 영향을 미치는 재무적 요인은 무엇인가를 규명하고, 이러한 재무적 요인이 주가변동성에 영향을 주는 정도가 기업특성에 따라 다르게 나타나고 있는지를 분석하고자 하는 것이다. 분석을 위하여 표본기업을 매출액증가율과 순이익증가율에 따라 4개의 집단으로 분류하였으며, 집단 간 변수의 차이를 검증하기 위하여 분산분석을 실시한 바, 자기자본순이익률과 자기자본영업이익 률을 제외한 모든 변수가 집단 간 유의적인 차이가 있는 것으로 나타났다. 4개의 집단에 대하여 주가변동률과 재무지표 사이의 회귀분석을 실시한 결과 집단 마다 유의성을 가지는 변수와 그 변수가 가지는 비표준화계수의 부호 및 크기에 차이가 있음을 알 수 있었다. 따라서 기업의 특성에 따라 재무비율이 주가변동율에 미치는 영향은 차이가 있을 것이라는 가설은 지지되고 있는 것으로 해석된다. The motivation of this study is identify financial factors influenced to volatility and analysis the effect of financial factors to volatility that is presumed different by business trait. For this study group sample business into four classes by increase ratio of sales and increase ratio of net profit. As a result of analysis of variance all the variables except ratio of net profit to equity capital and ratio of sales profit to equity capital shows resonable differences between four groups. Then it is expected that financial factors shows resonable relations to volatility at each four groups differently. As a result by regression it shows different resonable variables between four groups. And the size of unstandardized coefficients and symbols of unstandardized coefficients are different between four groups. So it is a
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이용환(Yong Hwan Lee) 한국교육과정학회 2002 교육과정연구 Vol.20 No.1
Since W. F. Pinar proposed reconceptualization of curriculum study, the concept of reconceptualization has been referred in various contexts and generally acknowledged to be accomplished. This study suggests the reconceptual.ization of curriculum study has endorsed various meanings and concepts of curriculum to be formed in the text called curriculum. The hermeneutic tradition inherited to Pinar by his mentor has made curriculum. field a text to be understood and interpreted, and assigned a major role to receptors, readers, and interpreters of the text in the process of meaning construction. Thus almost any concept and research method are allowed to the field. According to the hermeneutic tradition, knowledge is not, nor could it be, in the text solus and the background knowledge of the reader and the social situation of the act of reading determine the meaning, interpretation, and criticism of the text. In other words, there is no fixed meaning in the text. Thus, the text is rewritten with each reading. This interpretation of authorship is also in exact accord with Foucault`s refusal to maintain the sovereign function of the author with respect to his own texts. For Bakhtin, the actual meaning of an utterance is understood against the background of other concrete utterances on the same theme, a background made up of contradictory opinions, points of view and value judgements. However, this meaning is never the universal, absolute one. It is a conditional meaning acquired in a situation where one meaning and (an)other dialogue(s) with one another. It is a product of a negotiation which is a part of the process where meaning is continuously recreated in a specific space and time. The school text, for students, especially in Korea, stands as an iconic marker of authority, both a symbol and an agent of institutional power and the teacher becomes a surrogate author. If the teacher tries to seek for and deliver to the student a universal and fixed meaning in the school text of which he is a surrogate author, he is committing a terror in Lyotardian terms. This study suggests some concepts to be adequate for the teacher`s attitude toward the meaning of the school text, in order not to commit a terror, not to take a pseudo sovereignty. Those are: Foucault`s `disengagement`, Lyotard`s `paralogy`, Pignatelli`s `self-detachment`, and Lee`s `deprofessionalization`.
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모바일 디스플레이에서 TS 알고리즘을 이용한 실시간 얼굴영역 검출
이용환,김영섭,이상범,강정원,박진양,Lee, Yong-Hwan,Kim, Young-Seop,Rhee, Sang-Bum,Kang, Jung-Won,Park, Jin-Yang 한국반도체디스플레이기술학회 2005 반도체디스플레이기술학회지 Vol.4 No.1
This study presents a new algorithm to detect the facial feature in a color image entered from the mobile device with complex backgrounds and undefined distance between camera's location and the face. Since skin color model with Hough transformation spent approximately 90$\%$ of running time to extract the fitting ellipse for detection of the facial feature, we have changed the approach to the simple geometric vector operation, called a TS(Triangle-Square) transformation. As the experimental results, this gives benefit of reduced run time. We have similar ratio of face detection to other methods with fast speed enough to be used on real-time identification system in mobile environments.
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이용환,Lee Yong-hwan 한국정보통신학회 2005 한국정보통신학회논문지 Vol.9 No.7
프로그램의 순차적인 실행 순서를 바꾸는 명령어를 분기 명령어라 하며, 분기는 마이크로프로세서의 파이프라인 정지를 일으켜 성능을 저하시키는 가장 큰 원인이 된다. 이에 따라 분기를 정확히 예측하여 다음 실행될 명령어를 제공한다면 마이크로프로세서의 자연스런 명령어의 실행 흐름은 끊어지지 않게 되고 이로써 논은 성능의 향상을 기대할 수 있게 된다. 분기 예측을 위해서는 분기 타겟 버퍼가 필수적이며, 분기 타겟 버퍼는 분기 예측 결과에 따라 다음에 실행할 명령어의 주소를 제공한다. 본 논문에서는 가상주소를 실제주소로 바꾸어 주는 TLB와 분기 타겟 버퍼가 각각 가지고 있는 태그 메모리를 함께 사용하는 구조를 제안한다. 이러한 공유 태그 구조의 이점은 2재의 태그 메모리를 하나로 공유함으로써 칩 면적의 감소를 꾀하고 더불어 분기 예측 속도를 향상시킬 수 있다는 점이다. 또한, 본 논문에서 제안된 구조는 주소로 사용되는 비트 수가 커지거나 여러 개의 명령어를 동시에 실행할 수 있는 구조에서 그 이점이 더욱 커지기 때문에 향후 개발되는 마이크로프로세서에서 유용하게 사용될 수 있을 것으로 기대된다. Branch instructions which make the sequential instruction flow changed cause pipeline stalls in microprocessor. The pipeline hazard due to branch instructions are the most serious problem that degrades the performance of microprocessors. Branch target buffer predicts whether a branch will be taken or not and supplies the address of the next instruction on the basis of that prediction. If the hanch target buffer predicts correctly, the instruction flow will not be stalled. This leads to the better performance of microprocessor. In this paper, the architecture of a ta8 memory that branch target buffer and TLB can share is presented. Because the two tag memories used for branch target buffer and TLB each is replaced by single combined tag memory, we can expect the smaller chip size and the faster prediction. This shared tag architecture is more advantageous for the microprocessors that uses more bits of address and exploits much more instruction level parallelism.
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이용환,박명호,최명원,천봉권,허방,탁효정,황인철,Lee, Yong-Hwan,Park, Myung-Ho,Choi, Myung-Won,Chun, Bong-Kwon,Hur, Bang,Tak, Hyo-Jung,Hwang, In-Chul 한국생명과학회 2001 생명과학회지 Vol.11 No.6
Lead poisoning is currently one of the major public health problems in industrialized countries. Several chelating agents have been developed and used to treat the lead poisoning. It was recently proposed that garlic, having a large quantity of S-S compounds, may react readily with lead, producing various sulfur componds, and thus provide curative and protective effects on the lead toxicity. The present study was undertaken to evaluate this possibility in experimental animals. The garlic treatment on rats pre-exposed to lead significantly enhanced urinary excretion of lead at a garlic dose of 500 mg/kg and decreased the bloon level of lead at both 250 and 500 mg/kg doses. The administration of grilic 500mg/kg along with lead significantly alleviated the renal histological alterations induced by lead. These results suggest that garilic has a curative as well as a protective effect against lead poisoning , thus it may act as a chelator of lead.
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학교시설물의 친환경을 위한 건축계획 방향과 단계별 적용 제안 연구
이용환,한동욱,Lee, Yong-Hwan,Han, Dong-wook 한국교육녹색환경연구원 2010 교육·녹색환경연구 Vol.9 No.3
Architectural design for school can be completed well when the environment-friendly elements are satisfied. In other words, the environment-freindly element could be most important idea for school planning, and one should have this direction for each element as a design goal. In this study, I defined the "environment-friendly" as the environment for nature and human. I examined what could satisfy those and would be its principles. I set up the criteria to satisfy each priciple. Most important factor to keep the relation between nature and human would be reducing carbon dioxide emissions, and a green belt would absorb it. Therefore, I think that there would be effective possibility when suitable conditions are applied in phases. Every school can have comfort as environment-friendly facility, at the same time, contribute to nature. Also, students can learn and study nature, and perform a duty as human.
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