MRI를 이용한 한국인 하악과두의 형태에 관한 연구

이두희,오순호,서창호,김준배,Lee, Doo-Hee,Oh, Soon-Ho,Suh, Chang-Ho,Kim, Joon-Bae 대한구강악안면외과학회 2001 대한구강악안면외과학회지 Vol.27 No.5

Objective: This study was prepared to figure out a certain dimension and morphology of the condyle at the central, medial and lateral aspects on MR images of asymptomatic volunteers, which could be comparable with those of the TMD patients' condyle. Materials: Sixty TMJs from 30 asymptomatic volunteers(15 male, 15 female) who had no clinical symptoms and no disc displacement on sagital and coronal view of MRI were served as normal. Method: MR images were taken from the asymptomatic volunteers and the dimension of the anteroposterior length, mediolateral width, height, convexities were measured through the images on the sagittal and coronal sections of mandibular condyle. Then, these data were collected and analyzed. Result: The mean value of anteroposterior length was $8.00{\pm}1.21mm$ at central section and mediolateral length was $21.40{\pm}2.32mm$ on coronal view. The anterior condylar length at medial side was the shortest and the convexity of anterior slop at the lateral side was proved to be the flattest among 3 sections. There were little dimensional and morphological differences at sagittal sections, but the mediolateral width of condyle at coronal section was significantly different between male and female. Conclusion: In sagittal sections, the anterior condyle length was shortest at medial side and the convexity of anterior slop was flattest at lateral side, and there were little dimensional and morphologic differences between male and female. In coronal section, male's condyle was more wider and flatter than female's.

분자량 크기별 토양 휴믹산(HA)의 구조적 특성 및 페난트렌 흡착 반응특성 비교

이두희,김소희,신현상,Lee, Doo-Hee,Kim, So-Hui,Shin, Hyun-Sang 한국지하수토양환경학회 2015 지하수토양환경 Vol.20 No.7

A sample of soil humic acid (HA) was divided by ultrafiltration (UF) into five fractions of different molecular size (UF₁: > 300, UF₂: 100~300, UF₃: 30~100, UF₄: 10~30, UF₅: 1~10 kilodaltons). Apparent average molecular weight (M_w) of the HA fractions were measured using high performance size exclusion chromatography (HPSEC), and the chemical and structural properties of the five HA fractions were characterized by elemental compositions (H/C, O/C and w ((2O + 3NH)/ C)) and ultraviolet-visible absorption ratios (SUVA, A_4/6). The organic carbon normalized-sorption coefficients (Koc) for the binding of phenanthrene to the HA fractions were determined by fluorescence quenching and relationship between the sorption coefficients and structural characteristics of the HA fractions were investigated. The elemental analysis and UV-vis spectral data indicated that the HA fractions with higher molecular weights have grater aliphatic character and lower contents of oxygen, while the HA fractions with lower molecular size have greater aromatic character and molecular polarity that correspond to greater SUVA and internal oxidation values (w). The log Koc values (L/kg C) were gradual increased from 4.45 for UF₅ to 4.87 for UF1. The correlation study between the structural descriptors of the HA fractions and log Koc values of phenanthrene show that the magnitude of Koc values positively correlated with $M_w$ and H/C, while negatively correlated with the independent descriptors of the O/C, w, SUVA and A_4/6.

건설기업의 전략지원을 위한 BPM 우선적용 프로세스 선정에 관한 연구

이두희,송영웅,임형철,박태근,최윤기,Lee, Doo-Hee,Song, Young-Woong,Lim, Hyung-Cheol,Park, Tae-Keun,Choi, Yoon-Ki 한국건설관리학회 2010 한국건설관리학회 논문집 Vol.11 No.1

건설 산업은 다양한 프로젝트를 수행하는 수주중심의 산업적 특성상 정형화된 프로세스로 구축하여 운영하는 것이 매우 어렵다. 이에 건설기업의 동적인 업무 변화 특성 수용과 업무개선을 동시에 만족시킬 수 있는 BPM(Business Process Management)의 도입이 대형 건설업체를 중심으로 이루어지고 있는 상황이다. BPM의 특성과 기업의 고유 전략이 상이하기 때문에 일괄적인 적용은 어렵다. 이에 건설 산업의 특성과 프로세스를 이해하고 기업이 추구하는 비전과 목표에 부합하는 업무 프로세스를 우선 선정하여 적용하는 것이 필요하다. 본 연구에서는 기존 연구 고찰을 통하여 BPM 우선 적용 대상 프로세스 선정방안의 필요성을 제시하고, 건설기업 업무 프로세스 분석을 통해서 건설기업의 BPA를 구축하였다. 국내 건설기업의 전략목표 우선순위 파악을 통하여 높은 우선순위를 가지는 것으로 도출된 수익성과 성장성의 관점에서 핵심 업무 프로세스를 도출하였다. 또한 BPM 적용대상 프로세스 평가 기준을 6가지로 제시하여 이를 바탕으로 핵심 업무 프로세스를 평가하여 BPM 우선 적용 대상 프로세스를 도출하였다. Construction companies are fulfilled in according to project, and it is difficult to execute the standardized process in various construction projects. Thus many construction companies is adopting BPM(Business Process Management) that meet business process change and business improvement. However, it is difficult to apply BPM in a lump because of difference of BPM characteristics and company's strategies. For this reason, it is desirable to select business process based on company's priority. This study indicated need of method for selecting business process through studying current researches, and made BPA for construction company by analyzing business process in construction company. Moreover, this study indicated core business process from a point of profitability and growth view through grasping strategic goal priority. And also, it proposed criteria for process evaluation for BPM adoption, evaluated core business process, and indicated prior business process for BPM adoption.

악관절장애환자의 하악과두 크기에 관한 연구

이두희,오순호,서창호,김준배,Lee, Doo-Hee,Oh, Soon-Ho,Suh, Chang-Ho,Kim, Joon-Bae 대한구강악안면외과학회 2001 대한구강악안면외과학회지 Vol.27 No.5

Objective: In many TMD cases, deformed and reduced condyle heads were frequently observed. This study was prepared to compare the dimensions between normal and symptomatic condyles, using MR images. Materials: One hundred and twenty one patients with clinical signs and MRI-confirmed diagnosis of disc displacement were selected for this study. Thirty eight TMJs from nineteen asymptomatic volunteers who had no clinical symptoms and no disc displacement on sagittal and coronal view of MRI, were served as normal. Methods: Symptomatic condyles were classified according to the severity of the anterior disc displacement. The amount of anterior disc displacement was evaluated at sagittal section, and they were classified into 4 groups as normal(N), little(G0), mild(G1), moderate(G2) and severe displacement(G3). The dimentions of condyle were measured at the 200% magnified view, by digitizing program. All dimensions were compared among each groups on the central section of sagittal and coronal views, and the statistical analysis was performed. Results: The mean value of anteroposterior length of normal condyle was $0.79{\pm}0.13cm$ at sagittal section and mediolateral length was $2.12{\pm}0.22cm$ on coronal section. The mean value of anteroposterior length of symptomatic condyle was $0.67{\pm}0.16cm$ at sagittal section and mediolateral length was $1.97{\pm}0.28cm$ on coronal section. Conclusions: The size of symptomatic condyle was smaller than normal TMJ. The size of condyle was decreased as the amount of the disc displacement was increased. The dimensional change was found on the anterior articular surface of condyle at the mild or moderate disc displacement. And at the case of severe disc displacement, dimensional change was found on the superior articular surface.

YCbCr 컬러 모델에서의 조건 검사와 적응적 차영상을 이용한 화염 및 연기 검출 알고리즘

이두희(Doo-Hee Lee),유재욱(Jae-Wook Yoo),이강희(Kang-Hee Lee),김윤(Yoon Kim) 한국컴퓨터정보학회 2010 韓國컴퓨터情報學會論文誌 Vol.15 No.5

본 논문에서는 감시 카메라를 통해 입력된 영상 정보로 연기와 화염을 실시간 검출하는 알고리즘을 제안한다. 산불은 막대한 인명, 재산피해를 불러오기 때문에 조기 감지에 따른 초기 진화가 매우 중요하다. 제안하는 산불 감시 알고리즘은 화염 감지와 연기 감지로 나뉘는데, 화염 감지는 단일 프레임에서 YCbCr 컬러 모델에서의 조건 검사를 통하여 화염을 검출한다. 연기 감지를 위해서는 먼저 현재 영상과 인접한 프레임들의 평균 영상사이의 차를 가중치로 이용하여 배경 범위를 설정하고, 이 범위를 벗어나면서 회색조를 갖는 픽셀만을 연기영역으로 검출한다. 제안하는 화염 감지 알고리즘은 기존의 알고리즘보다 일조량에 따른 조도의 변화에 강건하고, 연기 검출 알고리즘은 단위 시간동안의 변화량을 고려하여 회색조의 픽셀만을 연기로 감지하기 때문에 효과적인 조기 산불 탐지가 가능하다. 실험 결과는 제안하는 산불 감시 알고리즘이 기존의 알고리즘보다 우수한 성능을 나타냄을 보여준다. In this paper, we propose a new real-time algorithm detecting the flame and smoke in digital CCTV images. Because the forest fire causes the enormous human life and damage of property, the early management according to the early sensing is very important. The proposed algorithm for monitoring forest fire is classified into the flame sensing and detection of smoke. The flame sensing algorithm detects a flame through the conditional test at YCbCr color model from the single frame. For the detection of smoke, firstly the background range is set by using differences between current picture and the average picture among the adjacent frames in the weighted value, and the pixels which get out of this range and have a gray-scale are detected in the smoke area. Because the proposed flame sensing algorithm is stronger than the existing algorithms in the change of the illuminance according to the quantity of sunshine, and the smoke detection algorithm senses the pixel of a gray-scale with the smoke considering the amount of change for unit time, the effective early forest fire detection is possible. The experimental results indicate that the proposed algorithm provides better performance than existing algorithms.

토양 휴믹물질의 화학적·분광학적 특성에 따른 페난트린 흡착상수와의 상관성 규명에 대한 연구

이두희(Doo Hee Lee),이승식(Seung Sik Lee),신현상(Hyun Sang Shin) 大韓環境工學會 2008 대한환경공학회지 Vol.30 No.11

광고와 상표인지도에 관한 실증적 연구

이두희(Doo Hee Lee) 한국경영학회 1993 經營學硏究 Vol.23 No.1

간질성 폐질환이 동반된 근침범이 없는 피부근염

이두희 ( Doo Hee Lee ),조영준 ( Young Jun Cho ),송정식 ( Jung Sik Song ),서창희 ( Chang Hee Seo ),이지수 ( Ji Soo Lee ),이수곤 ( Soo Kon Lee ) 대한류마티스학회 1999 대한류마티스학회지 Vol.6 No.1

Amyopathic dermatomyositis is defined by characteristic cutaneous manifestation of dermatomyositis without evidence of muscle involvement. There is no clinical difference between dermatomyositis and amyopathic dermatomyositis. Pulmonary involvement of dermatomyositis is so frequent than aggressive dianostic and therapeutic approach is needed. Early steroid or immunosuppresive treatment in pulmonary involvement of dermatomyositis gets better prognosis. Intravenous immunoglobulin treatment is an effective and safe alternative when the steroid or immunosuppresive treatment is ineffective or intolerable. We are reporting a case of amyopathic dermatomyositis with interstitial lung disease. This patient was improved with intravenous immunoglobulin treatment.

Y₂O₃ 첨가에 따른 Ba(Zn<SUB>1/3</SUB>Ta<SUB>2/3</SUB>) O₃계 세라믹스의 마이크로파 유전 특성에 관한 연구

李斗熙(Doo-Hee Lee),朴昌燁(Chang-Yub Park) 대한전기학회 1994 전기학회논문지 Vol.43 No.9

국내 폐사 조류 체내 중 잔류농약 분석

이두희 ( Doo-hee Lee ),김보경 ( Bo-kyong Kim ),손기동 ( Kidong Son ),김용식 ( Youngsik Kim ),정현미 ( Hyun-mi Jung ),최종우 ( Joowoo Choi ) 한국환경농학회 2017 한국환경농학회 학술대회집 Vol.2017 No.-

본 연구에서는 농약 중독으로 폐사가 예측된 조류의 원인 물질을 확인하기 위하여 503종의 잔류 농약 분석을 실시하였다. 시험에 사용된 시료는 2017년 상반기 국내에서 폐사된 직박구리, 떼까마 귀, 가창오리, 청둥오리, 비둘기 등 총 27시료에서 위 내용물 및 간을 대상으로 실시하였다. 시료 의 전처리는 QuEChERS 방법 중 AOAC 방법(Na-acetate 1.5 g과 MgSO₄ 6 g 첨가)을 적용하여 추 출한 후 EMR dSPE-lipid kit와 EMR Polish kit를 이용하여 정제하였다. 전처리된 시료는 LC/MS/MS 및 GC/MS/MS을 이용하여 MRM (Multiple Reaction Monitoring) 모드에서 잔류농약을 측정하였다. 또한, 시험전 시료 전처리 방법의 적합성을 확인하기 위해서 유기인산계 농약, 유기염 소계 농약, 피디린계 농약 등 다양한 농약류 중 250항목을 선정하여 방법검출한계, 검량한계, 정확 도, 정밀도 등의 정도관리를 실시하였으며, 그 결과 방법검출한계는 3.9∼79.9 ng/g, 정량한계는 12.5∼254.5 ng/g, 정확도 및 정밀도는 53.7∼126.4% 및 0.5∼19.6%로 나타났다. 시료 분석 결과, 직박구리 위내용물 시료에서는 monocrotophos, carbofuran, phosphamidon이 6.62~14.22 mg/kg으로 나타났으며 직박구리 간 시료에서는 동일한 농약류에서 N.D~9.59 mg/kg으로 나타났다. 떼까 마귀 위내용물 및 간 시료에서는 monocrotophos가 각각 6.62~14.23 mg/kg, 0.37~13.7 mg/kg으로 나타났으며, 가창오리 위내용물에서는 monocrotophos, benfracarb 및 carbofuran이 0.72~280.2 mg/kg으로 나타났다. 청둥오리 위내용물 시료에서는 carbofuran, carbosulfan 및 deltamethrin이 38.3~280.2 mg/kg로 나타났으며, 비둘기 위내용물 시료에서는 benfracarb 및 carbofuran이 50.5~156.8 mg/kg으로 나타났다. 본 연구결과를 통하여 국내 농약 중독으로 폐사된 조류의 원인 물질은 시중 판매되고 있는 benfracarb, carbofuran, carbosulfan, deltamethrin, monocrotophos 및 phosphamidon이며, 특히 carbofuran 및 monocrotophos가 주된 원인물질임을 확인하였다.