Wide open lateral cephalogram을 이용한 하악골 성장에 관한 연구

문성욱,박영국,정규림 대한치과교정학회 2001 대한치과교정학회지 Vol.31 No.1

교정치료를 함에 있어 하악골의 모양, 성장율, 성장방향에 대한 예측은 치료계획의 수립 및 치료기간과 예후를 결정하는데 있어 중요한 역할을 한다. 이를 규명하기 위해 다양한 방법들이 시도 되어왔고 측모두부방사선규격사진을 이용함으로써 좀 더 정확성을 기할 수 있게 되었다. 그러나 해부학적인 구조의 특성상 하악과두 부위에서 중첩이 발생하여 정확한 형태 및 위치의 측정에 의문이 남는다. 이 연구의 목적은 하악과두 부위에서 중첩을 피하여 좀 더 정확한 하악골의 형태 및 성장양상을 알아보고자 함에 있다. 이 연구는 1급 부정교합군 14명, 2급 부정교합군 9명, 3급 부정교합군 17명, 총 40명의 환자를 대상으로 평균 4년 3개월의 기간을 두고 최대개구상태의 측모두부방사선규격사진(Wide open lateral cephalogram)을 촬영하여 11개의 계측항목을 설정, 계측하였고 Autocad R14 program을 이용하여 평균적인 외형을 작도하고 측면적을 계측하여 비교, 분석하였다. 그 결과 다음의 결론을 얻었다. 1.하악체의 길이(gonion-menton)는 3급, 1급, 2급 순으로 증가추세를 보였고 3급 부정교합군이 2급 부정교합군에 비해 2배 이상 증가하였으나 통계학적으로는 3급 부정교합군과 1급 부정교합군, 2급 부정교합군과 1급 부정교합군 사이에는 유의성이 있었고 3급 부정교합군과 2급 부정교합군 사이에는 유의한 상관성이 없는 것으로 나타났다(P〈0.05). 2.Go-Me, A-Cd, B-Cp, E-F, G-H, 측면적의 항목에서 연 평균 성장량, 성장속도 들에서 3급 부정교합군에서 많은 증가를 보이고 특히 2급 부정교합군에 비해서는 명확한 차이를 보이고 있다. 3.평균 4년 3개월 동안의 하악골 측면적의 연 평균 성장량은 1급 부정교합군이 1.0cm2, 2급 부정교합군이 0.8cm2, 3급 부정교합군이 1.4cm2이고 성장율은 11.9%, 11.8%, 20.3%로 1급 부정교합군과 2급 부정교합군에서는 별 차이가 보이지 않았고 3급 부정교합군에서는 다른 두 군에 비해 2배에 가까운 성장율을 보였다. 이상의 결과에서 부정교합의 유형에 따른 하악골의 성장량의 차는 선천적인 악골의 크기에 의해서 라기 보다는 성장 중 발생하는 하악골의 성장속도와 성장량의 차이에 의한 것으로 사료된다. In proceeding with orthodontic treatment, the prediction for the shape, growth rate and growth direction of mandible plays a major role to set up the treatment plan and determine its period and prognosis. Various approaches being made so far have shown that the linear and angular measurement using lateral cephalograms are relatively accurate to estimate them. This study was purposed to find the shape of mandible more clearly by preventing the overlap of the Condyle head area which appears in lateral cephalogram, and to estimate its growth rate by comparing the growth quantity and ratio via lateral area measurement. This experimental was performed against 40 patients total, of which Class I of 14, Class II of 9 and Class III of 17 consist. Wide open lateral cephalograms of 40 patients were taken over average period of 4 Year 3 Months, then the linear and angular measurements were caned out with 11 itemized lists. Autocad R14 application program was utilized to draw their appearance, measure and compare their lateral area. As a result of study, conclusions were made as follows; 1.Mandibular body length (gonion-mentors) tended to increase in order of CIII, CI and CII, and Mandibular body length of CIII group had a tendency to grow twice faster than that of CII group. 2.In lateral items such as Go-Me, A-Cd, B-Cp, E-F and G-H, CIII showed a significant increase on the year-average quantity and rate of the growth, and especially apparent difference was observed in CIII group rather than CII group. 3.For the 4 Year 3 Months period, the year-average growth quantity of lateral area of the mandible was 1.0 cm2 for Class I, 0.8 cm2 for Class II and 1.4 cm2 for Class III, which corresponds to 11.9%, 11.8% and 20.3% of growth ratio respectively. Thus, growth ratio almost 2 times more than other groups was observed in group CIII while growth ratio between group CI and CII has little difference. 4.Considering the results as above, it can be proposed that the difference in size of the mandible between groups is caused by the difference in the growth rate and growth quantity of the mandible, which generated in the middle of growth, rather than the difference in size of congenital Jaw-bone.

수소공여제가 열경화성플라스틱의 열분해에 미치는 영향

김승문,김성수,김상국,정수현 한국공업화학회 2003 응용화학 Vol.7 No.1

이상의 실험 결과로부터 다음과 같이 요약할 수 있다. 1. 경유를 수소공여제로 사용하여 450℃에서 열분해 하였을때의 분해율은 49.70%으로 PP의 32.83%에 비해 분해율이 50% 향상되었다. 2. TS-D-450의 액상 수율이 40.63wt%로 가장 높았다. The effect of the Zeolite HX, NaX, and KX prepared by ion-exchange method, on the reduction-carburization of WO₃was studied, This study was performed at the temperature range from 300 ℃ to 725 ℃ with CO gas. The produced gas. CO₂, was analyzed by mass spectroscopy. The addition of the Zeolite HX, NaX, and KX into WO₃increased the efficiency of the reduction-carburization of WO₃and Zeoilte HX with the strongest acidity was the most effective on reduction-carburization among them. The Zeolite HX, NaX, and KX improved the oxygen mobility of WO₃and the acidity of the Zeolite was directly related to the increasing efficiency of reduction-carburization of WO₃.

시스템 다이내믹스를 이용한 간호단위별 간호인력 산정에 관한 연구

김문실,성영희,권경자,김도형,김정아,신덕신,유인자,유재국,이현숙 병원간호사회 2006 임상간호연구 Vol.11 No.2

Purpose: The purpose of the study was to forecast manpower by building the nursing manpower-staffing model(surgical-medical nursing unite). Method: The system dynamics approach was adapted to build a simulation model for calculating medical-surgical nursing manpower-staffing. The model was built up on Venism 5.0b DSS. Result: The results in the basic circumstance are in following. The level of nursing service quality, patientsatisfaction, and nurse job satisfaction maintains higher at medical-surgical nursing unit of the tertiary hospitals with the ratio of bed to nurse 2.5:1-3.0:1 than at any other situations. The level of nursing service quality, patient satisfaction, and nurse job satisfaction maintains higher at madical nursing unit of the secontary hospotals with the ratio of bed to nurse 3.0:1 and at surgical nursing unit of the secondary hospitals with the ratio of bed to nurse 3.0:1-3.5:1 than at any other situations in the fundamental from. The results in the simulation circumstance are in following, As author raises the operating rate of bed into 95-100%, and cut skilled nursing staff down, the level of nursing-service quality, patient satisfaction, and nurse job satisfaction drops slightly. Conclusion: In terms of economic efficiency on tertiary hospotals, the ratio of bed to nurse for the best reasonable medical-surgical nursing manpower-staffing is 3.0:1. In terms of economic efficiency on secondary hospitals, the ratio of bed to nurse for the best reasonable medical nursing manpower-staffing is 3.0:1 and surgical nursing manpower-staffing is 3.5:1

야뇨증 환아들의 심리사회적 특성에 대한 다기관 연구 : 행동 및 정서 문제를 중심으로

조수철,김재원,신민섭,황준원,한상원,박관현,이상돈,김경도,김건석,서홍진,이유식,정재용,김영균,문두건,남궁미경,한창희,조원열,김영식,배기수,이종국,정우영,신의진 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.6

Objectives : The aim of this study was to examine the behavioral and emotional problems associated with nocturnal enuresis in Korean children. Methods : Three hundred eighteen children with nocturnal enuresis, together with their parents, completed the Child Behavior Checklist (CBCL), Disruptive Behavior Disorder Scale according to DSM-IV (DBDS), Children's Depression Inventory (CDI), State-Trait Anxiety Inventory for Children (STAIC), and Piers-Harris Children's Self-Concept Scale (PHCSC). Ninety-three normal students were selected as the control group. Results : Compared to the normal control group, the mean scores with regard to the withdrawn, social problems, attention problems, delinquent behavior, aggressive behavior, externalizing problems and total problems profiles were significantly higher in the nocturnal enuresis group according to the CBCL results. The nocturnal enuresis group also scored significantly higher in the ADHD and ODD profiles of the DBDS. The nocturnal enuresis group was more depressed and anxious than the control group according to the results of the CDI and STAI. The mean score of the PHCSC was significantly lower in the nocturnal enuresis group when compared to the normal control group. Conclusion : The results of this study suggest that children with nocturnal enuresis in Korea have clinically relevant behavioral and emotional problems. The findings support the link between nocturnal enuresis and psychopathology in Korean children.

Unit Commitment by Separable Augmented Lagrangian Relaxation

Moon, Guk-Hyun,Joo, Sung-Kwan,Lee, Ki-Sung,Choi, Jae-Seok The Korean Institute of Electrical Engineers 2008 Journal of Electrical Engineering & Technology Vol.3 No.4

The non-separable quadratic penalty terms create an inherent difficulty when applying the standard augmented Lagrangian relaxation(ALR) method for decomposing the unit commitment problem into independent subproblems. This paper presents a separable augmented Lagrangian relaxation method for solving the unit commitment problem. The proposed method is designed to have a separable structure by introducing the quadratic terms with additional auxiliary terms in the augmented Lagrangian function. Numerical results are presented to validate the effectiveness of the proposed method.

파라미터 접근법을 이용한 정전비용 변화에 따른 신뢰도지수 평가

문국현(Guk-Hyun Moon),주성관(Sung-Kwan Joo),박종배(Jong-Bae Park),최재석(Jae-Seok Choi),차준민(Jun-Min Cha),류성호(Sung-Ho Ryoo),김홍희(Hong-Hee Kim) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7

전력계통의 신뢰도 평가는 전기에너지 공급을 안정적으로 유지하기 위해 이루어진다. 최근 국내 전력산업에 경쟁적 시장 환경이 조성됨에 따라, 신뢰도 평가 연구에 시장 근원적인 특성을 반영하는 것은 중요한 문제로 부각되고 있다. 본 논문에서는 파라미터 접근법을 이용하여 정전비용 변화에 따른 신뢰도지수를 분석해 보았다. 수요 데이터의 시나리오 기법을 활용한 다년간의 사례연구를 수행하여 신뢰도 평가 모델의 효용성을 입증한다.

Integrated-optic current sensors with a multimode interference waveguide device

Kim, Sung-Moon,Chu, Woo-Sung,Kim, Sang-Guk,Oh, Min-Cheol The Optical Society 2016 Optics express Vol.24 No.7

Medicinal Crop Selection Representing Antimicrobial Activity against Microorganisms

Sang Un Kim(김상언),Kyeong Gon Moon(문경곤),In Seok Eom(엄인석),Young Deok Bae(배영덕),Young Guk Kim(김영국),Il Rae Rho(노일래) 한국약용작물학회 2016 한국약용작물학회 학술대회논문집 Vol.2016 No.2

Unit Commitment by Separable Augmented Lagrangian Relaxation

Guk-Hyun Moon,Sung-Kwan Joo,Kisung Lee,Jae-Seok Choi 대한전기학회 2008 Journal of Electrical Engineering & Technology Vol.3 No.4

The non-separable quadratic penalty terms create an inherent difficulty when applying the standard augmented Lagrangian relaxation (ALR) method for decomposing the unit commitment problem into independent subproblems. This paper presents a separable augmented Lagrangian relaxation method for solving the unit commitment problem. The proposed method is designed to have a separable structure by introducing the quadratic terms with additional auxiliary terms in the augmented Lagrangian function. Numerical results are presented to validate the effectiveness of the proposed method.

Stochastic Integrated Generation and Transmission Planning Incorporating Electric Vehicle Deployment

Moon, Guk-Hyun,Kong, Seong-Bae,Joo, Sung-Kwan,Ryu, Heon-Su,Kim, Tae-Hoon The Korean Institute of Electrical Engineers 2013 Journal of Electrical Engineering & Technology Vol.8 No.1

The power industry is currently facing many challenges, due to the new environment created by the introduction of smart grid technologies. In particular, the large-scale deployment of electric vehicles (EVs) may have a significant impact on demand for electricity and, thereby, influence generation and transmission system planning. However, it is difficult to deal with uncertainties in EV charging loads using deterministic planning methods. This paper presents a two-stage stochastic decomposition method with Latin-hyper rectangle sampling (LHRS) to solve the integrated generation and transmission planning problem incorporating EV deployment. The probabilistic distribution of EV charging loads is estimated by Latin-hyper rectangle sampling (LHRS) to enhance the computational performance of the proposed method. Numerical results are presented to show the effectiveness of the proposed method.