Space Supervision을 이용한 치성 정중선 변위의 교정

김수연,최영철,박재홍,최성철,김광철 大韓小兒齒科學會 2007 大韓小兒齒科學會誌 Vol.34 No.4

상하악 중절치 간의 정중선 변위는 골격성 변위,치성 변위 및 골격성과 치성의 복합적 변위 등으로 구분된다. 그 중 치성 정중선 변위는 치열의 발육시기에 따라 다양한 방법으로 치료 방법을 선택할 수 있다. 특히 혼합치열의 초기에는 치열 내에 존재하는 공간의 조건,인접 영구치의 맹출 시기 또는 맹출 방향에 따라 영구 절치들의 위치가 자발적으로 변화,개선될 수 있다. 따라서 이러한 치아의 생리적 이동을 이용하여 특별한 교정장치의 이용 없이 치열 내에서 치아의 배열을 개선시킬 수 있다. 본 증례보고에서는 특히 유견치의 발거 시기 및 좌우 유치의 발거 순서 등을 이용하여 치성 정중선 불일치를 개선시킨 증례틀을 보고하고자 한다. A midline deviation is divided into three types, such as a skeletal midline deviation, a dental midline deviation, and a combination. Among them, the midline deviation which appear in the early mixed dentition without any skeletal problem can be managed differently by the stage of dental development. The location of the permanent incisors can be improved without using artificial force in consideration of the condition of the space, the eruption timing or the eruption path of the adjacent permanent teeth in early mixed dentition, especially when the permanent incisors are erupting. Therefore. the space supervision technique, which can have the teeth align themselves utilizing physiologic events such as sequence or timing of the eruption of permanent teeth, can be an alternative to orthodontic movement. This case report describes midline deviation improvement by space supervision.

히트파이프를 이용한 축열식 냉ㆍ난방 시스템에 관한 연구

김성실(Seong-Sil Kim),함성철(Seong-Chol Harm),이양호(Yang-Ho Lee),최병윤(Byoung-Youn Choi) 대한설비공학회 2006 대한설비공학회 학술발표대회논문집 Vol.2006 No.6

The heat pump system is attractive alternatives to conventional heating and cooling systems owing to their higher energy utilization efficiency. The thermal loads of commercial and institutional buildings are generally cooling-dominated. In this study have been developed ice storage type heat pump system for cooling and heating by heat pipe. This system was practiced performance test on evaluation criteria for heat storage systems. Accomplished the actual proof examination and looked into the performance of the system. In this study, measurement and analysis of ice storage type heat pump system for cooling and heating by heat pipe. The heat pump unit COP appears 3.05 for cooling and 4.20 for heating. As a result, the method to energy saving and to using a substitute energy actively that is heat pump cooling & heating system is expected by heat pipe. Thermal storage capacity appears 19.5RTH/㎥ for cooling.

선체운동 평가를 위한 다목적 계측시스템 개발에 관한 연구

김철승(Chol-Seong Kim),이윤석(Yun-Sok Lee),공길영(Gil-Young Kong),정창현(Chang-Hyun Jung),김대해(Dae-Hae Kim),조익순(Ik-Soon Cho) 한국항해항만학회 2005 한국항해항만학회지 Vol.29 No.10

본 연구에서는 선박의 항해 안전성과 정박 중인 선박의 계류 안전성 평가에 기초가 되는 선체운동 평가를 위한 다목적 계측시스템을 개발 하는데 있다. 다목적 계측시스템은 선박에 탑재되어 외력에 의해 발생하는 동적 동요를 계측 및 분석하기 위해 상하, 좌우, 전후방향의 가속도량을 측정하는 3축 가속도 계측기를 포함하여, 방위 센서, 2축 경사계 및 초음파 변위계로 구성하였다. 선박의 항해 및 계류 안전성을 종합적으로 평가하기 위해서는 특정 센서를 이용, 선체운동을 실시간으로 측정하여 내항성능 평가 시스템과 항해 또는 정박 중인 선박의 상태에 관한 선박 데이터베이스 시스템을 이용하여 평가한다. 개발된 다목적 계측시스템은 해상에서의 전복사고 분석, 선박 출입항 통제, 부두에서의 하역작업 통제, 조선소에서의 내항성능 및 안전설계에 있어서도 적용이 가능하리라 본다. In order to evaluate the safety of navigation at sea and the safety of mooring on berthing, it is necessary that the wave and wind induced ship dynamic motion should be measured in real time domain for the validity of theoretical evaluation method such as sea-keeping performance and safety of mooring. In this paper, the basic design of sensors is discussed and some system configurations were shown. The developed system mainly consists of 4 kinds of sensors such as three-dimensional accelerator, two-dimensional tilt sensor, azimuth sensor and two displacement sensors. Using this measuring system, it can be obtained the 6 degrees of freedom of ship dynamic motions at sea and on berthing such as rolling, pitching, yawing, swaying, heaving, surging under the certain external forces.

대형 컨테이너선의 천수역 영향을 고려한 접안에너지 산출에 관한 연구

김철승(Chol-Seong Kim),이윤석(Yun-Sok Lee),이충로(Chung-Ro Lee),조익순(Ik-Soon Cho) 한국항해항만학회 2005 한국항해항만학회지 Vol.29 No.8

선박의 대형화 추세에 따른 항만 운영의 효율성 및 대형 선박의 접안 안전성을 향상시키기 위해서는 먼저 선체에 작용하는 접안에너지를 합리적으로 산출하여야 한다. 선박의 접안에너지는 방충재와 같은 항만시설물의 설계에 대한 허용 기준을 결정하는 변수임과 동시에 도선사 및 선박의 조선자에게는 예인선의 필요 마력이나 접안속도 등을 결정하는데 있어 중요한 판단 요소로 활용된다. 본 연구에서는 현재 사용되고 있는 운동역학적인 방법을 토대로 한 접안에너지 산출 방법에 대해 유체역학적인 측면에서 문제를 제기하고, 부두 전면의 수심과 선박의 형상에 따라 변화하는 천수역 선체부가질량을 고려한 접안에너지의 산출 방법을 제안한다. 또한 천수역에서 선체에 작용하는 부가칠량을 고려한 접안에너지 산출 방법을 사용하여 1600TEU급에서 12000TEU급까지의 컨테이너 선박을 대상으로 계통적으로 각각의 접안에너지를 계산하고, 현행의 접안에너지 산출방법과 비교 검토를 실시한다. In order to improve the safety of ship berthing and the efficiency of berth operation in the harbour, the berthing energy acting on a ship in berthing maneuver need to be estimated properly. The berthing energy is used as one of the criteria to determine the maximum permissible load of fender as well as important factors to establish the berthing speed and the required power of tug-boat for pilot and ship operator. Some problems of berthing energy are discussed on the basis of the hydrodynamic aspects. Then, series calculations of berthing energy are carried out considering the effect of water depth on added mass and the ship shape for container series from 1,600TEU to 12,000TEU.

Sex-specific differences in the association of a common aldehyde dehydrogenase 2 gene polymorphism and alcohol consumption with stroke risk in a Korean population

Chol Shin,KyuBum Kwack,Nam H Cho,Seong Hwan Kim,Inkyung Baik 대한지역사회영양학회 2015 Nutrition Research and Practice Vol.9 No.1

BACKGROUND/OBJECTIVES: It is well-known that alcohol consumption is associated with stroke risk as well as with aldehyde dehydrogenase 2 gene (ALDH2) polymorphisms. However, it is unclear whether ALDH2 polymorphisms are associated with stroke risk independent of alcohol consumption and whether such association is modified by sex. We evaluated sex-specific associations of a common ALDH2 polymorphism and alcohol consumption with stroke risk in a Korean population. SUBJECTS/METHODS: We conducted a prospective cohort study involving 8,465 men and women, aged 40-69 years and free of stroke between June, 2001 and January, 2003, and followed for the development of stroke. We identified new cases of stroke, which were self-reported or ascertained from vital registration data. Based on genome-wide association data, we selected a single-nucleotide polymorphism (rs2074356), which shows high linkage disequilibrium with the functional polymorphism of ALDH2. We conducted Cox proportional hazards regression analysis considering potential risk factors collected from a baseline questionnaire. RESULTS: Over the median follow-up of 8 years, 121 cases of stroke were identified. Carrying the wild-type allele of the ALDH2 polymorphism increased stroke risk among men. The multivariate hazard ratio [95% confidence interval] of stroke was 2.02 [1.03-3.99] for the wild-type allele compared with the mutant alleles, but the association was attenuated after controlling for alcohol consumption. Combinations of the wild-type allele and other risk factors of stroke, such as old age, diabetes mellitus, and habitual snoring, synergistically increased the risk among men. Among women, however, the ALDH2 polymorphism was not associated with stroke risk. CONCLUSIONS: The prospective cohort study showed a significant association between a common ALDH2 polymorphism and stroke risk in Korean men, but not in Korean women, and also demonstrated that men with genetic disadvantages gain more risk when having risk factors of stroke. Thus, these men may need to make more concerted efforts to control modifiable risk factors of stroke.

牛蒡子의 추출조건에 따른 Linoleic Acid 의 정량 연구

조윤희,성경화,이은주,안덕균,박성규 대한본초학회 2002 大韓本草學會誌 Vol.17 No.2

objectives : Arcti Fructus has been used for disperses Wind Heat and benefits the throat, detoxifies Fire Poison and encourages rashes to surface, Polyunsaturated fatty acids(PUFAs), especially linoleic acid, γ-linolenic acid, arachidonic acid, are efficacious in treating skin disorders. methods : We analyzed the composition of PUFAs in Arcti Fructus. The analysis of PUFAs such as linoleic acid, γ-linolenic acid, arachidonic acid from the organic extract or reflux water extract of Arcti Fructus was conducted by Gas Chromatography with SPB-225 Fused Silica Capillary column. results : Of several PUFAs, Arcti Fructus contains linoleic acid only. Although the contents of linoleic acid from reflux water extract of Arcti Fructus was maximized after 3hr treatment, organic extract contains absolutely higher level of linoleic acid than reflux water extract. conclusion : Grinding process enhanced the contents of linoleic acid in reflux water extract of Arcti Fructus after 2hr treatment.

’The Analysis of Sulfur Compounds of Odorous Material in Kunsan Industrial Complex

Seong Cheon Kim,KI Hyun Klm,Yeo Jin Chol 한국환경보건학회 2005 한국환경보건학회 학술대회 자료집 Vol.2005 No.-

GIS기반의 도시지역 불투수면 관리를 위한 최적 투수/불투수도 제작 방법에 관한 연구

오성광 ( Seong Kwang Oh ),김계현 ( Kye Hyun Kim ),이철용 ( Chol Young Lee ),유광현 ( Kwang Hyun Ryu ) 한국물환경학회 2015 한국물환경학회지 Vol.31 No.2

Due to increasing impervious surfaces resulting from urbanization and industrialization which are directly linked to urban inundation and non-point pollutants runoff, there is a need to manage them systematically. A management over urban impervious surfaces calls for pervious/impervious maps, which enable viewing the distribution of impervious surfaces. Nevertheless, relevant data are absent as now. In this respect, despite the diversity of proposed methods, pilot implementation and accuracy verification have never been conducted. Therefore, this study is aimed to produce a pilot pervious/impervious map based on previously proposed methods and to elucidate its pros and cons with a view to proposing a method for producing a GIS-based optimal pervious/impervious map. Following previously proposed methods, a pervious/impervious map of Bupyeong-gu, Incheon was produced. Then, a method of producing optimal pervious/impervious maps applicable to urban areas was proposed through the comparison of pros and cons of relevant spatial data. As a result, the map had been confirmed 99.2% of classification accuracy. Based on the present findings, future studies should establish a standardized method for producing. Also, this method should be used to produce pervious/impervious maps of other regions so that it can be applied to managing impervious surfaces in major urban areas nationwide.

Ask-Upmark Kidney 1예

김성호,김창렬,이규환,이우길,전석철 대한신장학회 1988 대한신장학회잡지 Vol.7 No.1

산림의 수자원 공급 생태계서비스 평가를 위한 InVEST Water Yield 모형의 적용

송철호 ( Chol Ho Song ),이우균 ( Woo Kyun Lee ),최현아 ( Hyun Ah Choi ),전성우 ( Seong Woo Jeon ),김재욱 ( Jae Uk Kim ),김준순 ( Joon Soon Kim ),김정택 ( Jung Taek Kim ) 한국지리정보학회 2015 한국지리정보학회지 Vol.18 No.1

본 연구에서는 Natural Capital Project에서 개발 된 InVEST Water Yield 모형을 통해 국내 산림의 수자원 공급 서비스를 평가하고 적용성을 검토 해 보았다. InVEST Water Yield 모형은 총 8가지의 필수 입력자료를 요구하며, 그 중 6가지는 공간자료로, 2가지는 계수로 설정되었다. 국내에서 쉽게 활용 및 보정 가능한 자료를 이용한 모형 구동 결과, 우리나라 산림생태계의 수자원 공급서비스 총량인 수원함량은 2011년을 기준으로 9,409,622,083톤으로 나타났다. 이 결과는 해당년도 강우량의 분포와 비슷한 경향을 보였으며, 대상지에서 공간분석을 통해 이뤄진 기존 연구 및 통계적으로 분석된 전국 규모의 연구 결과와 비교 시 차이를 보였다. 이러한 차이는 모형의 기작 특성에 따른 통계적 방식과 공간적 구현 방식에서의 차이로 인해 발생하는 것으로 파악되었다. 따라서 InVEST 모형의 활용은 현 시점에도 개발이 지속되고 있는 상황임을 감안해야 하며, 정량적인 평가보다는 정성적인 평가에 중점을 두어야 할 것이다. 또한 향후 모형의 고도화를 위해서는 우리나라에 맞는 입력자료의 작성 및 멀티모델링을 통한 비교를 통해 정확성을 향상시켜야 한다. InVEST Water Yield model developed by Natural Capital Project was applied for South Korea to assess domestic forest ecosystem``s water provisioning services. The InVEST Water Yield model required 8 input dataset, including six spatial map data and two derived by coefficients. By running the model with relatively easy acquired and modified data, the result of domestic forest ecosystem``s water provisioning services was 9,409,622,083 ton using the standard of the year 2011. The result showed similar patterns and distribution of rainfall in 2011, but showed difference when compared with existing researches spatially driven in nationwide statistical analysis results. This difference is assumed to occur with different model mechanism in spatial implementation and statistical analysis. So given that the model is currently still developing, applications should be taken on qualitative perspectives rather than on quantitative perspectives. Additionally, for advancing the application of InVEST water yield model, quantification of suitable input data and comparison using multi-modeling is required.