1930년대 모더니즘과 도시시학

김동우(Kim Dong-Woo) 국어국문학회 2008 국어국문학 Vol.- No.149

This essay intends to explain the meaning of Korean modernism poetry and the poetics focusing on the urban space in which the modern age and modernity are realized and exhibited concrete place. This discussion generally has two subjects which are the poetic perception for urban and of the issue of the expression. The main point of Intellectualism, a branch of Korean modernism, is having a scientific and intellectual attitude for understanding the modern society. This has a positive meaning. Because of aiming the modern attitude of understanding the world and more definitely functioning a instrumental tool for perception and criticism of urban civilization which develops complicatedly. This is significant to understand the life-style of the urbanites objectively, considering city dwellers feel at over-sensitiveness that makes intellectualization of urban life eventually by reason of the own doublefaced character of urban and its complex artificial mechanism. But, on occasion that the attitude of perception changes to the issue of the expression the limit is revealed clearly. Because the liberated practice of intellectualized life is obtained in the opposite factor of it instead. In that respect Kywang-Kyun Kim‘s poetic art of formation attracts an attention. He was good at forming the urban image and lyric. The favorable comments for his commanding the image and unfavorable ones for his expressing the excessive feeling were the dominant existing criticisms. But, in relation to urban life, the lyric of his poems doesn't melted into the images fully call forth tragic beauty that stimulate alienation and sorrow of urbanite more strongly. For this reason Kywang-Kyun Kim's poem should be newly evaluated. And the synesthesia expressions reveal a new respect in connection with segmentalized and fragmental urban life-style. After all, his poem helps to recover man's totality through the integration of sense.

영역 특징벡터를 이용한 내용기반 영상검색

김동우,송영준,김영길,안재형,Kim Dong-Woo,Song Young-Jun,Kim Young-Gil,Ah Jae-Hyeong 한국정보처리학회 2006 정보처리학회논문지B Vol.13 No.1

본 논문은 기존의 컬러 히스토그램 방법들의 단점을 극복하고자 영역 특징백터를 이용한 영상 검색 방법을 제안한다. 컬러 히스토그램 검색방법들은 양자화 오류 등의 이유로 정확성이 떨어지는 단점이 있다 이를 해결하기 위해 제안 방법은 색상 정보를 HSY 공간으로 변환하여 순수 색상 정보인 hue 성분만을 양자화하여 히스토그램을 구하고, 이를 명암, 이동, 회전등에 강인한 검색 특징으로 사용한다. 또한 컬러 히스토그램 방법들의 가장 큰 문제점인 공간 정보가 부족한 것은 영상을 16개 영역으로 나눠서 각 영역간의 비교를 통해 해결한다. 그리고 색상 검색에 추가적으로 모양 특징인 에지와 질감 특징인 DCT 변환의 DC를 이용하여 검색의 정확도를 높인다 1,000개의 컬러 영상을 사용해 실험한 결과 기존의 방법들 보다 좋은 정확성을 보인다. This paper proposes a method of content-based image retrieval using region feature vector in order to overcome disadvantages of existing color histogram methods. The color histogram methods have a weak point that reduces accuracy because of quantization error, and more. In order to solve this, we convert color information to HSV space and quantize hue factor being purecolor information and calculate histogram and then use thus for retrieval feature that is robust in brightness, movement, and rotation. Also we solve an insufficient part that is the most serious problem in color histogram methods by dividing an image into sixteen regions and then comparing each region. We improve accuracy by edge and DC of DCT transformation. As a result of experimenting with 1,000 color images, the proposed method has showed better precision than the existing methods.

CO₂ 부가반응에 적용된 Silica 담지 이온성 액체 촉매

김동우,김현국,조득희,Kim, Dong-Woo,Kim, Hyeon-Gook,Cho, Deug-Hee 한국공업화학회 2016 공업화학 Vol.27 No.3

본 총설에서는 $CO_2$와 에폭시 화합물의 부가반응에서 무정형, SBA, MCM 또는 상업적으로 쉽게 이용 가능한 다양한 silica 지지체에 담지된 이온성 액체의 촉매적 적용가능성에 대하여 검토하였다. $CO_2$ 부가반응에 의한 5원환 카보네이트의 합성에 대하여 담지된 이온성 액체의 구조적인 영향과 silica 지지체의 종류에 따른 촉매 활성을 검토한 바, 관능기 또는 금속을 보유한 이온성 액체인 경우에 촉매 성능이 개선됨을 알 수 있었다. 또한 silica에 담지된 이온성 액체(SSIL) 촉매의 재사용성과 반응메커니즘을 조사하여 제시하였다. The catalytic applicability of various ionic liquids immobilized on different silica-supports such as amorphous, SBA, MCM and commercial silica for the cycloaddition of $CO_2$ and epoxides is reviewed in this work. The effects of different structures of supported ionic liquids and silica supports in the synthesis cyclic carbonate by the cycloaddition of $CO_2$ have been remarked. The studies revealed that ionic liquids possessing functional groups or metals exhibited increased catalytic performance towards cyclic carbonate synthesis. Moreover, the reusability of SSIL catalyst and mechanism for the cycloaddition of $CO_2$ were studied.

가압취반시(加壓炊飯時) 미반(米飯)의 물성변화(物性變化)에 관(關)한 연구(硏究)

김동우,장규섭,Kim, Dong Woo,Chang, Kyu Seob 충남대학교 농업과학연구소 1981 Korean Journal of Agricultural Science Vol.8 No.1

본(本) 연구(硏究)는 가압(加壓)솥에 의(依)한 취반시(炊飯時) 미반(米飯)의 물리적(物理的) 성상변화(性狀變化)를 조사(調査) 검토(檢討)하여 최적(最適) 취반조건(炊飯條件)을 구명(究明)함으로서, 효율적(效率的)이고 합리적(合理的)인 대량(大量) 취반방법(炊飯方法)을 개발(開發)하는데 필요(必要)한 기초자료(基礎資料)를 확립(確立)하는데 있으며, 시료(試料)는 국내(國內)에서 재배(栽培)되고 있는 대표적(代表的) 품종(品種)인 Japonica 계통(係統)의 밀양15호와 Indica 계통(係統)의 밀양23호를 7 분도(分搗) 및 9 분도(分搗)로 각각(各各) 조제(調製)한 것을 사용(使用)하였으며, 실험결과(實驗結果)를 요약(要約)하면 다음과 같다. l. 일반(一般) 가정(家庭)에서의 취반미(炊飯米)의 평균(平均) 수분함량(水分含量)은 상압(常壓)솥으로 한것은 65.17%, 가압(加壓)솥으로한 것은 64.52%였다. 2. 쌀의 수화력(水化力)은 밀양23호가 밀양15호 보다 평균(平均) 4.5% 더 높았으며, 밀양23호의 최대흡수량(最大吸收量)은 29.14%였다. 3. 쌀의 팽장용적(膨腸容積)은 흡수력(吸收力), 가열온도(加熱溫度) 및 시간(時間)에 따라 비례(比例)하여 변화(變化)하였고, 최대팽장용적(最大膨腸容積)은 원료(原料)에 대(對)하여 평균(平均) 3.2배(倍)였다. 4. 품종별(品種別) 미반(米飯)의 호화도(糊化度)는 가수율(加水率), 가열시간(加熱時間), 가열온도(加熱溫度)에 따라 크게 영향(影響)을 받았으며 최적조건(最適條件) (가수율(加水率) 160%, 취반압력(炊飯壓力) $0.2kg/cm^2$, 취반시간(炊飯時間) 25분(分))에서 호화도(糊化度)는 밀양23호 9분도미(分搗米)가 0.44였으며 밀양15호 9분도미(分搗米)는 0.64였다. 5. 미반(米飯)의 경도(硬度)는 가수율(加水率), 가열온도(加熱溫度), 가열시간(加熱時間)에 따라 감소(感少)하였으며, 최적조건(最適條件)에서 취반(炊飯)한 밀양23호 및 밀양15호 9분도미(分搗米)의 경도(硬度)는 각각(各各) 2.35kg/wt, 2.0kg/wt였다. 또한 동일(同一) 경도(硬度)를 유지(維持)하려면 밀양23호는 평균(平均) 25%의 가수량(加水量)이 더 필요(必要)하였다. 6. 탄력성(彈力性)은 가수율(加水率), 가열온도(加熱溫度), 가열시간(加熱時間)에 따라 비례(比例)하여 변하(變)였고, 최적조건(最適條件)에서 밀양23호 및 밀양 15호 9분도미(分搗米)의 탄력성(彈力性)은 각각(各各) 15.7mm 및 19.2mm였다. 7. gumminess는 가수량(加水量), 가열온도(加熱溫度), 가열시간(加熱時間)에 따라 감소(減少)하였으며, 최적조건(最適條件)에서 밀양23호 9분도미(分搗米)가 60이었고, 밀양15호 9분도미(分搗米)는 73 이었다. 8. 압력별(壓力別) 최적취반(最適炊飯) 소요시간(所要時間)은 가수율(加水率) 160%에서 밀양15호 9분도미(分搗米)는 $0.2kg/cm^2$에서 25분(分), $0.4kg/cm^2$에서 20분(分), $0.6kg/cm^2$에서 15분(分), $0.8kg/cm^2$에 서 10분(分)이었다. This study was carried out in order to provide the basic data necessary to develop the effective and desirable cooking method on large scale for investigating the physical characteristics of cooked rices and studying optimum cooking conditions by pressure in kettle cooking rices. Milyang-15, local Japonica type and Milyang-23, high yielding Indica type major varieties cultivated in Korea were used as cooking sample after polishing 70% and 90% respectively, and the results obtained are summarized as follows. 1. The average moisture content of cooked rice by open kettle and pressure kettle method in typical households were 65.17% and 64.52%, respectively. 2. In water absorption capacity of rice grain Milyang-23 was 4.5% higher than Milyang-15, and maximum water content after absorption in Milyang-23 was 29.14%. 3. The expansion volume of cooked rice was changed proportionally by water absorption, heating temperature and time, and maximum expansion volume of cooked rice was 3.2 times greater than rice grain. 4. The gelatinization degree of cooked rice intensively concerning in hardness of rice grain was increased as water-to-rice ratio, heating temperature and time increased, and it was 0.44 in Milyang-23 and 0.64 in Milyang-15 under the optimum cooking conditions as 160% water-to-rice ratio, $0.2kg/cm^2$ cooking pressure and 25 minutes cooking time. 5. The hardness of cooked rice was decreased as water-to-rice ratio, heating temperature and time increased, and it showed 2.35kg/wt in 90% polished Milyang-23 and 2.0kg/wt in 90 polished Milyang-15 under optimum cooking conditions. For maintaining the same level of hardness of cooking rice Milyang-23 required 25% much more water than Milyang-15. 6. The elasticity of cooked rice was changed proportionally by water-to-rice ratio, heating temperature and time, and it appeared 19.2mm and 15.7mm in 90% polished Milyang-15 and Milyang-23 respectively. 7. The gumminess of cooked rice was decreased as water-to-rice ratio, heating temperature and time increased, and it showed 60 and 73 in 90% polished Milyang-23 and Milyang-15, respectively. 8. The optimum cooking time on differerent pressure in kettle took 25 minutes at $0.2kg/cm^2$, 20 minutes at $0.4kg/cm^2$, 15 minutes at $0.6kg/cm^2$, and 10 minutes at $0.8kg/cm^2$.

환경영향 요소를 고려한 특고압 전기설비의 안전등급 평가시스템

김동우,임용배,이기연,문현욱,Kim, Dong-Woo,Lim, Young-Bea,Lee, Ki-Yeon,Moon, Hyun-Wook 대한전기학회 2017 전기학회논문지 Vol.66 No.1

This paper presents an assessment system of safety level of 22.9kV grade high voltage electrical facilities considering environmental factors. The assessment system was developed based on the following procedure. Firstly, assessment structure was determined by consulting standards regarding inspection and diagnosis of electrical facilities. Secondly, contents of items and sub items of assessment system were developed. Thirdly, in order to quantify the importance of the assessment system, the weight was calculated using Analytic Hierarchy Process(AHP). Lastly, assessment table of safety level was developed including environmental factors such as period of use and load factor. The developed system can evaluate the safety level of high voltage facilities in an objective way. Therefore it can be applicable to electrical safety management system based on Internet of Things(IoT).

다중회귀분석을 이용한 BK7 글래스 MR Polishing 공정의 재료 제거 조건 분석

김동우,이정원,조명우,신영재,Kim, Dong-Woo,Lee, Jung-Won,Cho, Myeong-Woo,Shin, Young-Jae 한국생산제조학회 2010 한국생산제조학회지 Vol.26 No.2

Recently, the polishing process using magnetorheological fluids(MR fluids) has been focused as a new ultra-precision polishing technology for micro and optical parts such as aspheric lenses, etc. This method uses MR fluid as a polishing media which contains required micro abrasives. In the MR polishing process, the surface roughness and material removal rate of a workpiece are affected by the process parameters, such as the properties of used nonmagnetic abrasives(particle material, size, aspect ratio and density, etc.), rotating wheel speed, imposed magnetic flux density and feed rate, etc. The objective of this research is to predict MRR according to the polishing conditions based on the multiple regression analysis. Three polishing parameters such as wheel speed, feed rates and current value were optimized. For experimental works, an orthogonal array L27(313) was used based on DOE(Design of Experiments), and ANOVA(Analysis of Variance) was carried out. Finally, it was possible to recognize that the sequence of the factors affecting MRR correspond to feed rate, current and wheel speed, and to determine a combination of optimal polishing conditions.

EP와 MR Polishing 복합공정에 의한 304 스테인리스강의 경면가공

김동우,홍광표,조명우,이은상,Kim, Dong-Woo,Hong, Kwang-Pyo,Cho, Myeong-Woo,Lee, Eun-Sang 한국생산제조학회 2010 한국생산제조학회지 Vol.26 No.2

Recently, the magnetorheological (MR) polishing process has been examined as a new ultra-precision polishing technology for mirror surface generation in many applications, such as aspheric lenses, biochips, micro parts, etc. This method uses MR fluids which contains micro abrasives as a polishing media, and can. It is possible to obtain nano level surface roughness under suitable process conditions, however, required polishing time is highly dependent on the applied pre-polishing methods due to its very small material removal rate. Thus, in this study, a combined polishing method is presented to reduce total polishing time for SUS304. First, the electropolishing (EP) method was applied to obtain fine surface roughness, and the MR polishing was followed. Surface roughness variations were investigated according to the process conditions. As the results of this study, it was possible to reduce total polishing time for SUS304 using the proposed combined polishing method.

기초지반고가 상이한 지반-구조물-구조물의 상호작용에 의한 지진응답 해석연구

김동우,Kim. Dong Woo 한국방재학회 2014 한국방재학회논문집 Vol.14 No.2

본 연구에서는 이웃한 빌딩의 기초가 서로 상이한 경우 상호작용에 대한 지진응답을 해석하였다. 구조물과 지반은 각기 세 가지 모델에 대하여 연구하였다. 즉 첫째와 둘째 모델의 경우에는 빌딩은 프레임모델과 bar모델로 지반은 그리드모델로 설정하였고, 셋째 모델의 경우에는 구조물과 지반을 평면응력과 평면변형율로 모델화하였으며 구조물에 대한 상대적인 관성모멘트는 지반의 탄성모듈과 함께 구조물의 단면력에 영향을 미치므로 함께 고려되었다. 근사해석으로는 유한요소기법을 사용하였고 지진파입력기법과 Transit조건 등을 적용하여 제시된 예들을 통하여 지반과 구조물-구조물의 상호작용 안전성을 논증하였다. The aim of this paper is to study the interaction between adjacent buildings with different foundation levels under earthquake loading conditions. Buildings and soil are represented by three different models. In the first and second cases the building itself is modeled with standard frame and equivalent bar element, whereas the soil behavior is stimulated by a special grid model. In the third case, the building and soil are represented by plane stress or plane strain elements. The modulus of elasticity of the ground is varied. Just like the modification of the modulus of elasticity the varying relations of inertia have a strong influence on the section forces within the buildings. The analysis is carried out using numerical program which has developed based on the axisymmetric fine element method in corporation of rough element for soil region and wave input technique transit boundary condition. Interaction of the proposed method is demonstrated in numerical examples.

천화분 추출물이 혈관신생 및 암세포성장에 미치는 영향

김동우,이종훈,유화승,조정효,이연월,손창규,조종관,Kim, Dong-Woo,Lee, Jong-Hoon,Yoo, Hwa-Seung,Cho, Jung-Hyo,Lee, Yeon-Weol,Son, Chang-Gue,Cho, Chong-Kwan 대한한방내과학회 2008 大韓韓方內科學會誌 Vol.29 No.2

Objectives : This study was aimed to elucidate the effects of Trichosanthes kirilowii extract (TKE) on the angiogenesis and growth of tumor cells. Methods : Tube formation assay was performed by using human umbilical vein endothelial cells (HUVEC), and anchorage dependent colony assay was performed by using B16-F10 melanoma, Hep G2 and HT1080, CT-26 and SNU-1 cells. Results : For HUVEC, TKE at a level of more than 100 ${\mu}g/m{\ell}$ suppresses cell growth. For HUVEC at 100 ${\mu}g/m{\ell}$ and greater TKE density, the formation of tubes was suppressed in a dose-dependant manner. TKE controls the colony formations of B16-F10 melanoma cells, CT 26 cells, and Hep G2 cells, and its effect is proportional to density. In HT1080 cells and SNU-1 cells, formation is suppressed regardless of density. Conclusions : From these results, it could be concluded that TKE has significant properties on anti-angiogenesis and growth inhibiting of tumor cells. It is suggested that TKE will be a good candidate for new drugs or therapeutics for anti-angiogenesis.

자소엽(紫蘇葉)의 한약재 표준화 연구

김동우,황귀서,Kim, Dong-Woo,Hwang, Gwi-Seo 대한예방한의학회 2006 대한예방한의학회지 Vol.10 No.2

Perilla frutescens is known as the herb helps digestion, tonifies stomachache, and decreases fever in oriental medicine. And it is reported it possess the anti-pyretic effect, anti-inflammatory effect, anti-allergy effect, anti-tumor effect etc. The components isolated from this herb consist of perilla aldehyde, d-limonene, ${\alpha}-pinene$, cyanin, linoleic acid, palmitic acid, menthol, rosmarinic acid and luteolin etc. But there is no effective tools to determine the quality of this herb. In this study, we aimed to analyze the changes of liquid chromatogram pattern, one of major standardization method, to determine the quality of Perilla frutescens.