< 전쟁 그 이후전 > 과 이용환의 사진

이용환(Yong Hwan Lee),권석렬(Suk Yeol Kwon) 한국다큐멘터리사진학회 2000 Viscom Vol.1 No.-

창의적 융합교육에 의한 교육환경 공간 변화에 관한 연구 - 창의성 촉발의 탈중심적 및 사건적 공간을 중심으로 -

이용환,Lee, Yong-Hwan 한국교육녹색환경연구원 2015 교육·녹색환경연구 Vol.14 No.2

This study is currently presenting a creative education policy through the new 2015 revised curriculum and the Free semester system of Middle School as part of the education policy reform in the government-led, high freedom grade in each regional school board first, emotional schools, friendly school, campus type schools, etc. with creative thinking and improve students' autonomous judgment with the psychological and political reasons meant to provide amusement and certainty of their career choice. This creates space for creative education through the theoretical understanding of the educational philosophical thinking on creativity was to identify the appropriate means of educational space. The purpose of this study was to extract the linkage to produce creative educational environment that is generated through the philosophical thinking of the historical and psychological analysis of creativity with a human being. Future school construction has a future-oriented task should create a creative learning space in the center of the member schools. This creates space for creative education through the theoretical understanding of the educational philosophical thinking on creativity was to identify the appropriate means of educational space. Therefore Philosophical Thinking Creative School of members through the grounds centric collaboration focused on convergence enemy curriculum and school creative autonomy of operation which is central educational environment, that is diversified assistance as an attribute of the environment, space, space, flexible outdoor space, linking enemy center space, different types and sizes of the space case situation, the open space and spatial fusion can be seen the configuration doeeojim with different training space element.

교육과정 패러다임의 변화와 교사

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`.

교과교실형 고등학교의 건축 평면적 특성 연구

이용환,이영수,Lee, Yong-Hwan,Lee, Young-Soo 한국교육녹색환경연구원 2010 교육·녹색환경연구 Vol.9 No.3

The Ministry of educational science and technology is about to conduct its 7th &8th curriculum. However, there are some problems in achieving its goals under the current class model system in both educational and architectural. This study finds the characteristics of the arrangements and architectural planning in the departmental system - designed high schools. As a result, the arrangement was tend to be 'overall type' or 'central type' depending on the teaching-learning efficiency. Liberal arts and science&technology groups were placed close, and foreign languages and general cultural studies were arranged close as well. Importantly, there were supporting facilities such as a gymnasium, a cafeteria, a library, a computer lab, and an all-purpose-room, and this arrangement provided convenience. It is for the better learning effect and the high efficiency. It is worthy noticing that the placement and formation of individual or study space is regarded importantly. In flow planning, it seemed that it was designed to reduce the users' movement to a minimum. However, there are still some problems compared to Japan or the States, who already has an established departmental system. I think that the government should enforce its necessity of planning to schools, relevant divisions, or architects to bring it up. Furthermore, it is urgently needed a practical and future-oriented study that can forecast any changes in architectural spaces within the ever-changing teaching and learning environment in the information-oriented society.

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.

단일 영상에서 디포커스 맵을 활용한 보케 효과 알고리즘

이용환,김흥준,Lee, Yong-Hwan,Kim, Heung Jun 한국반도체디스플레이기술학회 2022 반도체디스플레이기술학회지 Vol.21 No.3

Bokeh effect is a stylistic technique that can produce blurring the background of photos. This paper implements to produce a bokeh effect with a single image by post processing. Generating depth map is a key process of bokeh effect, and depth map is an image that contains information relating to the distance of the surfaces of scene objects from a viewpoint. First, this work presents algorithms to determine the depth map from a single input image. Then, we obtain a sparse defocus map with gradient ratio from input image and blurred image. Defocus map is obtained by propagating threshold values from edges using matting Laplacian. Finally, we obtain the blurred image on foreground and background segmentation with bokeh effect achieved. With the experimental results, an efficient image processing method with bokeh effect applied using a single image is presented.

납중독에 대한 마늘의 치료와 방어효과

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.

HDR 이미지를 위한 단면 톤 매핑 개선 알고리즘 구현

이용환,김흥준,Lee, Yong-Hwan,Kim, Heung-Jun 한국반도체디스플레이기술학회 2021 반도체디스플레이기술학회지 Vol.20 No.2

High dynamic range (HDR) technology has been drawing attention in the field of imaging and consumer entertainment. As tools for capturing and creating HDR contents, encoding, and transmission evolve to support HDR formats, various display capabilities are being developed and increased. Hence, there is need for remapping native HDR imagery for display on lower quality legacy standard dynamic range (SDR) displays. This operation is referred to as tone mapping. In this paper, we present a sectional tone mapping method by Lenzen, and expand upon a tone mapping approach to improve temporal stability while maintaining picture quality. Compared to the existing block-based sectional tone mapping, our method uses the edge awareness-based tone mapping. We estimate the performance of the objective metric on temporal flickering. The experimental result shows that the algorithm maintains a smoother relationship between the output luminance values, and this reveals success in reducing halos and improving temporal stability with adopted edge aware filtering.

효율적인 분기 예측을 위한 공유 구조의 BTB

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.

객체 검출을 위한 CNN과 YOLO 성능 비교 실험

이용환,김영섭,Lee, Yong-Hwan,Kim, Youngseop 한국반도체디스플레이기술학회 2020 반도체디스플레이기술학회지 Vol.19 No.1

Object detection plays a critical role in the field of computer vision, and various researches have rapidly increased along with applying convolutional neural network and its modified structures since 2012. There are representative object detection algorithms, which are convolutional neural networks and YOLO. This paper presents two representative algorithm series, based on CNN and YOLO which solves the problem of CNN bounding box. We compare the performance of algorithm series in terms of accuracy, speed and cost. Compared with the latest advanced solution, YOLO v3 achieves a good trade-off between speed and accuracy.