Rayleigh 페이딩 채널에서 대한 CQ Importance Sampling 기법

이대일(Dae Il Lee),김동인(Dong In Kim) 한국정보과학회 1997 한국정보과학회 학술발표논문집 Vol.1997 No.4

GIS를 이용한 지가 및 생활중심시설 분석을 통한 생활권 중심과 범위 설정에 관한 연구

이대일(Lee, Dae-Il),장한두(Jang, Han-Doo) 대한건축학회 2013 대한건축학회논문집 Vol.29 No.3

The constitution of urban district centers and community spheres is useful to plan community unit for regeneration of urban residential areas, and the methods of organization is important. This study has two objectives: (1) to present methods to identify urban district centers and community spheres in small and medium sized cities and (2) to suggest evaluation index standards to construct them. In this study, geographical information system (GIS) was used and several steps were followed. At first, the expected urban district centers were discovered by investigating land prices and numbers of major facilities in Jeonju city. Second, time series regression model was considered to find out the final urban district centers with analyzing relationship between land prices and distance to expected urban district. Third, the evaluation method and index standards were proposed to plan urban districts and communities in small and medium sized cities. Overall, the results of this study demonstrated that this evaluation process and results are helpful to restructure urban planning system by constructing urban district centers and community spheres.

근대 디자인사에서 바우하우스의 의미에 대한 연구

이대일(Lee Dae-Il) 한국미술교육학회 2006 美術敎育論叢 Vol.20 No.3

  바우하우스는 20세기 조형교육의 시발점이 되었을 뿐만 아니라 건축 및 회화와 디자인 등 예술세계를 망라하는 근대조형양식의 근거가 되었다는 점에서 근대 대자인사의 결정적인 틀을 형성한 것으로 평가되고 있다. 과학-기술 세계의 인식방법과 궤를 같이하는 이 조형운동은 객관성과 보편성을 추구하여 기계시대에 어울리는 기능주의적 조형관을 확립하게 된다. 이것은 근대성의 중추를 이루는 이성?합리주의 정신의 형태적 구현이다.<BR>  그러나 1970년대를 경과하여 근대성에 대한 비판적 성찰이 사회 전면으로 등장함에 따라 바우하우스의 역사적 의미에 대한 새로운 평가와 자리매김이 요구되고 있다. 이러한 맥락에서 근대적 양식과 개성 구현의 문제, 근대 합리주의 정신과의 관계 그리고 추상적인 조형언어와 이에 따른 인간의 인식방법의 변화 및 감수성의 변화 그리고 예술의 대중화나 새로운 질서와 통일성 등의 문제에 비추어 바우하우스의 의미를 새롭게 밝혀본다.   Bauhaus is being evaluated that it made a decisive frame of the modern design history in the respect that it became not only the start for the 20th century"s plastic education, but the basis of the modern plastic mode containing art world such as architecture, paintings and design. This plastic movement which has the same track with the way of cognition of the science-technology world pursues objectivity and universality, and then it comes to establish the plastic view of the functionalism which becomes to the machine age. This is the embodiment of the rationalism which forms the pivot of modernity.<BR>  However, this functional plastic way which has the axes-abstraction and measuring-comes to wear the character of the standardization because the modern rationality hold on formal rationality than substantial rationality. For this reason the off-modernism phenomena which try to break uniformity as a frame of the society governing as well as cultural standardization begins to be projected into the fields of society. This is a culture phenomenon which gives weight to the subjectivity world instead of the characteristics of the modern society which regard as of great importance the objectivity and universality.<BR>  Viewing this historic relationships, Bauhaus will be given the general meaning in the fact that it produced the culture pattern according with the congregating way of life of the moderners (in other words, the innovative changed way of life such as, the type of residence and material production-consumption system).<BR>  However, at the same time this brought culture wearing strong uniformity instead of the cultural peculiarity and diversity. Besides, it played a considerable role in shaping the city-sensibility(the new sensibility of human) and furthermore, it influenced a great deal upon the way of cognition about things. And also the new uniformity was emphasized, which reflects the social uniformity of technology-ration taking the place of the religious uniformity in the premodern age.<BR>  Examining the meaning of Bauhaus, this will be an important basis in the creation of the more meaningful new plastic mode.

원형제트의 제어를 통한 보텍스 구조

이대일(Dae Il Lee),김정우(Jungwoo Kim),최해천(Haecheon Choi) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11

The objective of this work is to study various vortical structures from controlled circular jet such as trifurcating and blooming jets. The numerical simulations of flow from a circular jet are carried out at Re<SUB>D</SUB> = 4300 based on the jet-exit velocity and jet diameter using large eddy simulation with the dynamic Smagorinsky model in a cylindrical coordinate system. The excitation for the controlled jet is achieved by combining axial and helical excitations. The axial velocity controlled by blowing and suction at the jet exit has several peaks in their cycle with respect to ratio of axial to helical excitations. This active control changes the spreading angle and vortical structures in the downstream region.

PLS기반 c-퍼지 모델트리를 이용한 클로로필-a 농도 예측

이대종(Dae-Jong Lee),박상영(Sang-Young Park),정남정(Nahm-Chung Jung),이혜근(Hye-Keun Lee),박진일(Jin-Il Park),전명근(Meung-Geun Chun) 한국지능시스템학회 2006 한국지능시스템학회논문지 Vol.16 No.6

본 논문에서는 부분최소법 (PLS: Partial least square)과 C-퍼지 모델트리를 적용하여 클로로필-a 농도의 예측 모델을 제안한다. 제안된 방법은 모든 입력속성을 고려하여 퍼지 클러스터에 의해 계산된 중심벡터를 설정한 후, 각각의 중심벡터들과 입력속성간의 소속도를 이용하여 내부 노드를 형성하고, 형성된 내부노드에서 PLS를 적용하여 지역모델(Local model)을 구축한다. 노드의 분리기준으로서 부모노드(parent node)에서 구축된 모델에서 계산된 에러값이 자식노드(child node)에서 계산된 에러값보다 클 경우에 분기가 이루어진다. 최종 단계에서는 임의의 입력데이터와 잎노드에서 계산된 클러스터 중심값과 비교하여 소속도가 높은 클러스터에 속한 지역모델을 선택하여 출력값을 예측한다. 제안된 방법의 우수성을 보이 기 위해 수질 데이터를 대상으로 실험한 결과 기존의 모델트리 방식에 비하여 향상된 성능을 보임을 알 수 있었다. This paper proposes a c-fuzzy model tree using partial least square method to predict the Chlorophyll-a concentration in each zone. First, cluster centers are calculated by fuzzy clustering method using all input and output attributes. And then, each internal node is produced according to fuzzy membership values between centers and input attributes. Linear models are constructed by partial least square method considering input-output pairs remained in each internal node. The expansion of internal node is determined by comparing errors calculated in parent node with ones in child node, respectively. On the other hands, prediction is performed with a linear model having the highest fuzzy membership value between input attributes and cluster centers in leaf nodes. To show the effectiveness of the proposed method, we have applied our method to water quality data set measured at several stations. Under various experiments, our proposed method shows better performance than conventional least square based model tree method.

Ecological modeling for the prediction and management of water quality in coastal seas of Korea

이대인(Dae In Lee),박청길(Chung Kil Park),최영찬(Young Chun Choi),이석모(Suk Mo Lee),조은일(Eun Il Cho) 한국해양환경·에너지학회 2004 한국해양환경공학회 학술대회논문집 Vol.2004 No.-

To aid in effectively managing the water quality of coastal areas, we used an eco-hydrodynamic model to predict summer water quality and to estimate the reduction in pollutant loads required to recover water quality. Under current environmental conditions, chemical oxygen demand (COD) exceeded seawater quality criteria, and water conditions were eutrophic. When we reduced the terrestrial COD, nitrogen, and phosphorus loads by 90%, the water quality criteria of Region A (Chinhae Bay) were not satisfied. However, when the nutrient loads from sediment and land were each reduced by 70% simultaneously, COD and Chl-α were recovered. When we reduced the input COD and nutrient loads from the Nakdong River by 80%, Chl-α and COD of Region B (Estuary of the Nakdong River) decreased below 10 ㎍ 1?¹ and 2 ㎎ 1?¹, respectively. The water quality criteria of Region C (Coastal sea of Busan) were satisfied when we reduced the terrestrial COD and nutrient loads by 70%. To achieve the reduction in pollutant loads, sustainable countermeasures, which include the expansion of sewage and wastewater facilities, sediment control, and limited land use, are necessary.

군 사망사건에서 사자(死者)의 부검과 생명윤리

이대일 ( Lee Dae-il ) 연세법학회 2023 연세법학 Vol.41 No.-

The purpose of this study is to prevent the rights of the deceased and the bereaved families in the military from being infringed. Unlike in the past, military investigative agencies do not cover up deaths. Military investigative agencies are investigating more precisely based on a wide range of personnel and organizations. Military investigative agencies sometimes ask the bereaved families to agree to an autopsy even if an autopsy is not necessary to prevent questions from occurring about the death in advance. However, despite the fact that the cause of death has already been clearly identified as suicide through a post-mortem examination, it is not reasonable to continue to persuade the bereaved families by saying that the investigation agency will arbitrarily find the truth. If the subjectivity of rights can be recognized by the deceased, it can be seen as a violation of the rights to the freedom of the body guaranteed by the constitution. As seen in the recent death in Itaewon, the bereaved families who lost their loved ones fall into great sadness. Watching the moment of the bereaved families who actually experienced sudden suicide, it is difficult to have any conversation with the bereaved families, and the bereaved families often cannot judge rationally. Prior to the autopsy, a post-mortem examination is conducted to examine the exterior only with the eyes, and the bereaved family can also be present in this process. The bereaved family, who identified the body of the deceased during the coroner's admission, weeps even more. After the post-mortem examination, it is necessary to decide whether to do an autopsy, but it is questionable who can decide whether to do the autopsy. As seen in the recent death in Itaewon, the bereaved families who lost their loved ones fall into great sadness. Watching the moment of the bereaved families who actually experienced sudden suicide, it is difficult to have any conversation with the bereaved families, and the bereaved families often cannot judge rationally. Prior to the autopsy, a post-mortem examination is conducted to examine the exterior only with the eyes, and the bereaved family can also be present in this process. The bereaved family, who identified the body of the deceased during the coroner's admission, weeps even more. After the post-mortem examination, it is necessary to decide whether to do an autopsy, but it is questionable who can decide whether to do the autopsy. In order for an investigative agency to conduct an autopsy, it must correspond to a “critical management case” or a “autopsy consideration case.” The case in which the investigative agency needs to obtain consent from the bereaved families is that neither the “critical management case” nor the “autopsy consideration case” is applicable. In this case, the only way for the investigative agency to conduct an autopsy should correspond to the “death of the bereaved family raising suspicions about the cause of death” in the “autopsy consideration case”. In other words, it is not reasonable to conduct an autopsy even though the cause of death has already been clearly identified as suicide through a post-mortem examination and does not fall under either “critical management” or “autopsy considerations.”

수도권 경사주거지의 분포 현황과 생활환경 특성 분석 : - 경사도 유형을 중심으로 -

이대일(Lee, Dae Il),장한두(Jang, Han Doo) 대한부동산학회 2020 大韓不動産學會誌 Vol.38 No.1

본 연구는 수도권에 위치한 경사주거지의 주거환경 개선을 위해 현황과 문제를 파악하는데 목적을 두었으며 주택 수요와 개발 압력이 상대적으로 높은 서울, 경기, 인천 지역의 28개 경사지를 선정후, GIS분석과 설문조사를 실시하고 경사도 수준에 따라 4개 유형을 구분한 후 유형별 특성 분석을 통해 경사도 수준별 생활환경의 차이와 문제를 파악하고자 하였다. 수도권 경사주거지의 분포 현황을 GIS 분석을 통해 전용 및 일반주거지역의 경사지 개별필지를 경사를 기준으로 구분하여 분포 비율을 파악하고, 경사 유형별로 필지의 규모, 주택유형, 인접도로폭 등의 현황 분석을 하였다. 설문조사는 경사지 845부, 인접평지 175부, 총1,020필지를 2013년에 개별방문 방식으로 조사하였으며, 주민이 주거환경을 평가한 88개 항목을 요인분석을 통해 16개 요인으로 압축하여 설명변수로 하고 주거만족도를 종속변수로하는 회귀분석을 실시하여 경사 유형별로 주거만족 영향요인을 비교분석하였다. The purpose of this study was to investigate the distribution status and the factors influencing residential satisfaction in hillside residences of Metropolitan areas in Korea. A cross-sectional survey with face-to-face interviews and Geographic Information System (GIS) were used and the data were collected in from March to April 2013. Participants were total 1,020 residents who were 845 residences representing 28 hillside areas, and 175 residences representing neighboring flat areas in metropolitan areas, such as Seoul, Incheon, and Gyeonggi-do. The slope type was based on the slope level of the individual parcels of participants’ by using GIS analysis. Collected data were analyzed with descriptive tatistics, factor analysis, and multiple regression using the SPSS Win program. This study showed significant factors influencing residential satisfaction and dis-satisfaction, according to the slope types. These results could be used as useful evidences for improving the residential satisfaction of Hillside Residences in Korea.

항공기 성능개량에 따른 적합성 입증을 위한 공기역학적 해석 방법

이대일(Dae Il Lee),배중헌(Bae Joong Hun) 한국항공우주학회 2017 한국항공우주학회 학술발표회 논문집 Vol.2017 No.11

자궁경부 상피세포위축과 골다공증의 상관관계 분석

이대일,남하경,이미화,곽민정,이현정,이수배,홍광선,Lee, Dae-Il,Nam, Ha-Gyeong,Lee, Mi-Hwa,Gwak, Min-Jeong,Lee, Hyeon-Jeong,Lee, Su-Bae,Hong, Gwang-Seon 한국건강관리협회 2006 한국건강관리협회지 Vol.4 No.1

Background : Osteoporosis and atrophic cell pattern in Pap smear are frequent findings In postmenopausal women due to loss of ovarian function, The present study attempted to find out possible correlation between morphologic characteristics of Pap smear and osteoporosis. Material & methods: The subjects were 825 women(age from 35 to 80) who had undergone Pap smear and bone mineral density(BMD) at The Korea Association of Health Promotion, Seoul Branch, from March 8 to May 10, 2005. Pap smears from 825 women were reviewed and classified either mature cell pattern or atrophic cell pattern by their cytologic patterns, BMD were measured using LUNAR DPX MdIQ(Minster, Ohio, USA). BMD value of lumbar spine(Ll, L2,L3 and L4) were measured from 825 women and BMD value of proximal region off emur(neck NK, Wards triangle WT, and trochanter TR) were measured from 818 women and their bone status were classified as normal( T-sore:>-1.0), osteopenia (T-score: -l~<-2,5) and osteoporosis(T-score: ≤ -2.5). And age distribution of Pap smear, average T-value andfrequency ofsteoporo-sis of each region of the bone, percentage of osteoporosis of each boneregion by age group and changing pattern of percentage of osteopenia and osteoporosis in certain postmenopausal period were compared between mature and atrophic cell pattern. Results: Pap smears revealed total mature cell pattern 53,9%(445/825) and total atrophic cell pattern 46.1%(380/825), Percentage of mature cell pattern decreased from 98.2%(168/171)under 44 age group to 13,3%(17/128) over 65 age group and mature cell pattern increased from 1.8%(3/171) under 44 age group to 86.7%(111/128) oyer 65 age group. Mean T-value of each region of lumbar spine and femur of mature cell pattern were lower than that of atrophic cell pattern about -1,5. And osteoporosis has noted in atrophic cell pattern showing odds ratio Ll 13.9, L2 15.3, L3 12.0, L4 10,4, UK 6.7, WT 10.9 and TR 4.1.Atrophic cell pattern started to increase after 45 years of age and osteoporosis of a trophic cell pattern started after 55 years of age. During 50 to 64 years of age period, L3, L4 and WT revealed parallel increased of osteopenia and osteoporosis and Ll, L2 revealed decreased of osteopenia and increased of osteoporosis. nia Conclusion: Above findings suggest that atrophic cell pattern of Pap smear precedes osteoporosis about 10 years and one of predictor of osteoporosis.