우리나라 산림공간데이터 통합관리시스템의 연구- 새로운 산림공간정보기반(FSDI) 모델의 도입 -

이영진 한국지적정보학회 2018 한국지적정보학회지 Vol.20 No.3

In this study, the unified system of the forest land data management and the national geoSspatial information policies were reviewed, and the new NSDI strategy as proposed by Lee(2014) was applied and extended to the public-private sharing data. Then it was suggested with new concept of Forest geoSpatial Information Infrastructure(FSDI) model that can be added to forest digital map on spatial core data. The new institutional model of KFS(Korea Forest Service) is improving localization and reinforcing cooperation system within agencies, Government 3.0 can be feasible according to common data related to regional forest services and local government’s data vertically or horizontally. It also can be the unified system to integrate and link all the map and the register data which are managed by the laws and institutions, as a common data can include all spatial core data(digital map). 본 연구에서는 산림공간데이터 관리시스템과 국가공간정보정책을 검토하고 국내외 흐름을 반영하여 산림분야에 이영진(2014)에서 제시한 새로운 개념의 NSDI 모델을 적용하고 공공-민간 데이터의 공유데이터를 확장하여, 새로운 산림공간정보기반(FSDI) 모델을 제시하였다. 새로운 개념의 NSDI를 적용한 산림청기관모델에서는 기본공간정보 부문을 모든 활용부문의 공통기반으로 하고 산림데이터를 재편성하는 모델이며, 공통기반 데이터를 통하여 산림청 소속기관 및 지방정부 데이터를 수직적 또는 수평적으로 연계하여정부3.0이 가능하게 된다. 또한 통합관리시스템에서는 법령 또는 관리기관에 따라 독자적으로 운영되고 있는 모든 도면과 공부를 공통기반(수치지도)과 통합, 연계할 수 있는 전략모델이다.

복막가점액종의 진단 및 치료방침

이영진,김희철,이동희,유창식,김진천 대한대장항문학회 2001 Annals of Coloproctolgy Vol.17 No.3

빛의 역사와 어둠의 기억: 세계문화유산 미이케 탄광의 ‘부 의 유산’을 둘러싸고

이영진 서울대학교 아시아연구소 2022 아시아리뷰 Vol.12 No.2

이 글은 2015년 유네스코 세계유산에 등재된 <메이지 일본의 산업혁명유산>의 한 자산인 미이케 탄광의 여러 숨겨진 기 억들을 지역사적 관점에서 조망하면서, 유산화가 초래하는 영향들에 지역 사회가 어떻게 대응하고 있는가를 고찰한 논문 이다. 미이케 탄광은 124년의 유서 깊은 역사를 가진 일본 최대의 탄전으로, 근대 일본의 산업화를 이야기함에 있어 빠트 릴 수 없는 상징적 가치를 지닌 대표적인 기억의 장이다. 하지만 ‘근대 일본 초기 산업혁명의 발상지’라는 국가주도적 내러티브는 미이케 탄광에 대한 지역 사회 내의 다양한 감 정기억들을 담아내기에는 많은 한계를 내포하고 있다. 실제로 지역 사회의 집합적 기억에서 가장 중요한 사건들은 전후 일 본의 최대의 노동쟁의로 알려져 있는 ‘미쓰이 미이케 쟁의’(1959~1960)와, 뒤이은 ‘탄진폭발사고’(1963)이며, 이 사건들을 둘러싼 지역 사회 내부의 다양한 입장 차이와 감정적 대립은 현재까지도 지역 사회의 기억 실천에 커다란 영향을 미치고 있다. 또한 근대 일본의 빛나는 산업화를 강조하는 세계유산의 공식적 수사학은 아시아-태평양 전쟁 시기 미이케 탄광에 서 이루어진 조선인·중국인 강제노동이나, 탄광 개발 초기 수인(囚人) 노동의 역사 등 다양한 어둠의 기억들을 은폐하고 있다는 점에서 문제적이다. 그런 점에서 메이지 일본의 산업혁명의 발상지라는 신화적 기억 속에 봉인되어 버린 미이케 탄 광의 다양한 어둠의 역사를 읽어 내고자 하는 이 글의 시도는 과거의 진정한 형상으로서의 변증법적 이미지를 찾고자 했 던 벤야민의 미학적 작업을 계승하는 것이기도 하다.

비선형 파라미터 최적화를 위한 SDS 알고리즘의 개발에 관한 연구

이영진,장용훈,이권순 동아대학교 공과대학부설 생산기술연구소 1997 生産技術硏究所硏究論文集 Vol.2 No.2

The simulated annealing(SA) algorithm is a stochastic strategy for search of the ground state and a powerful tool for optimization, based on the annealing process used for the crystallization in physical systems. It's main disadvantage is the long convergence time by unnecessary extra works. Therefore, this paper develops a modified SA which is the SDS(Stochastic Deterministic Stochastic) algorithm can minimize cost function of the economic load dispatch problem.

The Effect of High-resolution Parallel-hole Collimator Materials with a Pixelated Semiconductor SPECT System at Equivalent Sensitivities: Monte Carlo Simulation Studies

이영진,김대홍,김희중 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.64 No.7

In nuclear medicine, the use of a pixelated semiconductor detector with cadmium telluride (CdTe)or cadmium zinc telluride (CdZnTe) is of growing interest for new devices. Especially, the spatialresolution can be improved by using a pixelated parallel-hole collimator with equal holes and pixelsizes based on the above-mentioned detector. High-absorption and high-stopping-power pixelatedparallel-hole collimator materials are often chosen because of their good spatial resolution. Capturingmore gamma rays, however, may result in decreased sensitivity with the same collimatorgeometric designs. Therefore, a trade-off between spatial resolution and sensitivity is very importantin nuclear medicine imaging. The purpose of this study was to compare spatial resolutionsusing a pixelated semiconductor single photon emission computed tomography (SPECT) systemwith lead, tungsten, gold, and depleted uranium pixelated parallel-hole collimators at equal sensitivity. We performed a simulation study of the PID 350 (Ajat Oy Ltd., Finland) CdTe pixelatedsemiconductor detector (pixel size: 0.35 × 0.35 mm2) by using a Geant4 Application for TomographicEmission (GATE) simulation. Spatial resolutions were measured with different collimatormaterials at equivalent sensitivities. Additionally, hot-rod phantom images were acquired for eachsource-to-collimator distance by using a GATE simulation. At equivalent sensitivities, measuredaverages of the full width at half maximum (FWHM) using lead, tungsten, and gold were 4.32,2.93, and 2.23% higher than that of depleted uranium, respectively. Furthermore, for the full widthat tenth maximum (FWTM), measured averages when using lead, tungsten, and gold were 6.29,4.10, and 2.65% higher than that of depleted uranium, respectively. Although, the spatial resolutionshowed little differences among the different pixelated parallel-hole collimator materials,lower absorption and stopping power materials such as lead and tungsten had relatively bettercharacteristics at specific sensitivities.

Optimization of a High-resolution Collimator for a CdTe Detector: Monte Carlo Simulation Studies

이영진,류현주,조효민,이승완,최유나,김희중 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.60 No.5

Photon counting detectors using cadmium zinc telluride (CZT) or cadmium telluride (CdTe) have benefits compared to conventional scintillation detectors, and CZT and CdTe have advantageous physical characteristics for nuclear medicine imaging. Recently, many studies have been conducted using these materials to improve the sensitivity and the spatial resolution of the photon counting detector. By using a pixelated parallel-hole collimator, we may be able to improve the sensitivity and the spatial resolution. The purpose of this study was to optimize the design of a collimator to achieve excellent resolution and high sensitivity for a gamma camera system based on the CdTe detector. In this study we simulated a gamma camera system with a photon counting detector based on CdTe and evaluated the system’s performance. We performed a simulation study of the PID 350 (Ajat Oy Ltd., Finland) CdTe detector by using a Geant4 Application for Tomographic Emission (GATE) simulation. This detector consists of small pixels (0.35 × 0.35 mm²). We designed two parallel-hole collimators with different shapes and verified their usefulness. One was the proposed pixelated parallel-hole collimator in which the hole size and the pixel size are the same, and the other was the hexagonal parallel-hole collimator, which had a hole size similar to that of the pixelated parallel-hole collimator. We evaluated the sensitivity, spatial resolution, and contrast resolution to determine which parallel-hole collimator was best for the PID 350 CdTe detector. The average sensitivity was 22.65% higher for the pixelated parallel-hole collimator than for the hexagonal parallel-hole collimator. Also, the pixelated parallel-hole collimator provided 10.7% better spatial resolution than the hexagonal parallel-hole collimator, and the contrast resolution was improved by 8.93%. These results reflect an improvement in sensitivity and spatial resolution, and indicate that the imaging performance of the pixelated parallel-hole collimator is better than that of the hexagonal parallel-hole collimator. In conclusion, we successfully established a high resolution gamma camera system with a pixelated parallel-hole collimator, and based on our results, we recommend using the pixelated parallel-hole collimator to improve the sensitivity and the spatial resolution of gamma camera systems with semiconductor detectors such as CdTe.

수치해석을 이용한 흙막이벽체의 사보강버팀보에 적용하는 축강성에 대한 현장 적용성 연구

이영진,이성규,이강일,Lee, Yeong-Jin,Lee, Soung-Kyu,Lee, Kang-Il 한국지반신소재학회 2022 한국지반신소재학회 논문집 Vol.21 No.2

Unlike the horizontal strut, the corner strut causes bending behavior by the installation angle when soil pressure occurs, so there is a limit to its application as a elasto plastic method that requires only the axial stiffness of struts. Therefore, this study attempted to approach a method of modifying axial stiffness data to present an analysis method for corner struts in elasto plastic method, and linear elasticity analysis was used for this. And, through Linear elasticity analysis, axial stiffness data for corner struts installed at the actual site were calculated. The behavior of the retainingwall was confirmed by applying the calculated axial stiffness data of corner struts to elasto plastic method, and its applicability was evaluated by comparing it with the measurement results and the finite element analysis results. As a result of the study, when the axial stiffness data of the corner struts was applied using Linear elasticity analysis(Case 1, Case 3), the axial stiffness data decreased to 9% to 17% compared to the general method of applying the axial stiffness of the struts(Case 2, Case 4), and the displacement of the retainingwall increased to 25.33% to 64.42%. Comparing this result with the measurement results, when Linear elasticity analysis was used(Case 1, Case 3), the behavior of the retainingwall during the elasto plastic method was better shown.

Comparison of a Newly-designed Stack-up Collimator with Conventional Parallel-hole Collimators in Pre-clinical CZT Gamma Camera Systems: A Monte Carlo Simulation Study

이영진,김희중 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.65 No.7

Recently, many studies have been conducted with pixelated semiconductor detectors that usecadmium zinc telluride (CZT) because these detectors have many advantages in pre-clinical gammaimaging. Collimators play an extremely important role in the imaging performance of pixelatedsemiconductor gamma cameras. In our previous study, based on the pixelated semiconductor gammacamera system we recommended the use of a pixelated parallel-hole collimator with equal hole andpixel sizes; this approach improved both the sensitivity and the spatial resolution. However, thepixelated parallel-hole collimator had two major limitations: (a) Although its sensitivity was higherthan that of pinhole systems, the pixelated parallel-hole collimator may have still resulted in apartial loss of sensitivity due to its small collimator hole size. (b) The pixelated parallel-holecollimator with an adequate septal height was difficult to manufacture due to its small holes. Here,we present a new design for a parallel-hole collimator, which uses the stack-up method and aCZT pixelated semiconductor gamma camera system. The purpose of this study was to comparethe performances of various geometric designs of our newly-designed parallel-hole collimator withthose of conventional parallel-hole collimators [low-energy high-resolution (LEHR) and low-energyhigh-sensitivity (LEHS)]. The detector was modeled as an eValuator-2500 (eV MicroelectronicsInc., Saxonburg, PA, USA) (3-mm thick, 0.5-mm pixel size) by using a Geant4 Application forTomographic Emission (GATE) simulation. The proposed parallel-hole collimator consisted of twooverlapping parallel-hole collimators. The size of each hole in the proposed parallel-hole collimatorwas four times that of the hole in the pixelated parallel-hole collimator. The overlap ratios of thesecollimators were 1 : 1, 1 : 2, 2 : 1, 1 : 5, and 5 : 1. To evaluate and compare the performancesof these systems, we evaluated the sensitivity and the spatial resolution of each system. Theaverage sensitivities of the proposed parallel-hole collimators with overlap ratios of 1 : 1, 1 : 2 or2 : 1, and 1 : 5 or 5 : 1 and of the LEHS conventional parallel-hole collimator were 2.17, 3.45,13.90, and 3.68 times higher than the average sensitivities of the LEHR conventional parallel-holecollimator, respectively. The average spatial resolution also varied depending on the distance fromthe collimator. In conclusion, we successfully designed a novel parallel-hole collimator for pre-clinicalimaging; this novel collimator employs the stack-up method with a CZT pixelated semiconductorgamma camera.

Oxygen flooding에 의해 왜곡된 SIMS depth profile의 보정

이영진,정칠성,윤명노,이순영 한국진공학회 2001 Applied Science and Convergence Technology Vol.10 No.2

Oxygen flooding을 이용한 Secondary ion Mass Spectrometry(SIMS) 분석에 있어서 표면에 산화막이 있을 때 발생하는 SIMS depth profile의 왜곡현상에 대한 원인을 분석하고 이를 보정하였다. 이러한 왜곡현상은 표면 산화막에서와 Si 매질에서의 sputter rate이 다른 데서 발생하는 깊이 보정 오류와 상대감도인자(relative sensitivity factor, RSF)가 다른 데서 발생하는 농도보정 오류로부터 발생됨이 밝혀졌다. 깊이보정 오류를 바로잡기 위하여 $N^a+$ 이온을 산화막과 Si 매질의 계면에 대한 marker로 사용하였으며 산화막 두께는 SEM 및 XPS로 측정하였다. 산화막과 Si 매질에서의 sputter rate 및 RSF의 차이는 주로 oxygen flooding이 유발한 산화막 형성시의 부피팽창에 의한 것으로 해석되었으며 이를 보정한 depth profile은 oxygen flooding없이 분석한 경우와 거의 동일한 결과를 보여주었다. Distortion of Secondary Ion Mass Spectrometry(SIMS) depth profile, which is usually observed when the analysis is made using oxygen flooding on the surface of Si with oxide on it, has been corrected. The origin of distortion has been attributed to depth calibration error due to sputter rate difference and concentration calibration error due to relative sensitivity factor(RSF) difference between $SiO_2$ and Si layers, In order to correct depth calibration error, artifact in analysis of sodium ion on oxide was used to define the interface in SIMS depth profile and oxide thickness was measured with SEM and XPS. The differences of sputter rate and RSF between two layers have been attributed to volume swelling of Si substrate occurred by oxygen flooding induced oxidation. The corrected SIMS depth profiles showed almost the same results with those obtained without oxygen flooding.

꽃을 모티브로 활용한 컨템퍼러리 패션 디자인 경향

이영진 한국꽃예술학회 2008 한국꽃예술학회지 Vol.13 No.1

본 연구에서는 최근 패션 디자인 트렌드를 중심으로 ‘꽃'을 모티브로 한 패션 디자인의 경향을 살펴보았다. 자료는 최근 3년간의 파리, 밀라노, 뉴욕의 세계 3대 컬렉션과 패션트렌드 정보회사의 분석 자료 및 국내외 의류 브랜드의 카탈로그, 패션 화보, 각종 실물 사진 등을 사용하였다. 수집한 자료를 다음과 같은 4가지 기준에 따라 분류하였으며, 각각의 특징은 다음과 같다. 첫째, 꽃이 텍스타일에 프린트 문양으로서 사용된 경우로 다양한 미술 기법이 사용되어 직접 그린 듯한 꽃 무늬와 사실적인 느낌이 배제된 그래픽한 디자인이 특징이다. 둘째, 소재 표면 가공으로 다양한 꽃의 형상을 나타낸 경우로 레이스, 펀칭, 컷팅 가공이 이에 속한다. 고급 맞춤복인 오뜨뚜띄르풍의 기법으로 정교한 수작업의 느낌을 주어 럭셔리한 분위기를 주는 것이 특징이다. 셋째, 각종 오브제를 활용하여 입체적인 꽃형태로 의복 표면을 장식한 경우로 대표적인 예로는 각종 코사지가 이에 해당하며 그 외에 오리가미 기법과 프릴, 플리츠 등을 사용하여 의복의 표면을 꽃의 형태를 적용하여 입체적으로 꾸민 것이 특징이다. 넷째, 꽃의 형태 조형미를 의복의 실루엣에 적용한 경우로 꽃송이 또는 꽃잎의 실루엣과 같은 의복형태를 가지도록 디자인된 것인데, 여성적인 느낌을 주는 것이 특징이다. 이러한 분석은 디자인 경향을 이해하는데 도움을 줄 수 있을 뿐 아니라, 새로운 디자인을 발상하고 이를 구체화하는데 기초 자료가 될 수 있을 것으로 기대된다. In this study, I looked into trend of a fashion design using by flower motive in recent fashion design trends. Applied data is thing of New York, Milan, Paris collection and fashion trend information company of recent three years. Collected data were classified according to four following bases, and each characteristics are as follows. The first, flower were used as print patterns to textile. The flower pattern that various artistic techniques are used, and it is seemed to picture and the graphical design that realistic feeling was excluded are characteristics. Second, there are material face treatment. these are made-up a lace, punching, a cutting with a case to have shown with a form of various flowers. These use the handwork which is elaborate to techniques of Haute Couture, and it is characteristics to decrease by a high-quality atmosphere. Third, It is what the clothes face was decorated to objet of a three-dimensional flower shape which is corsage, technique of origami, frill and pleats. Forth, it is for a silhouette of clothes to have become a design with a form of a petal or a flower, and feminine atmosphere is characteristics. The analysis of this study is to provide guidance to understand recent fashion trend and to plan fashion design by flower motive.