GIS와 RS를 이용한 생태지도 작성기법에 관한 기초연구

이기철,이원화,윤해순,남춘희,김구연,김승환,서상현 한국지리정보학회 2004 한국지리정보학회지 Vol.7 No.3

본 연구는 낙동강 하구 일대의 생태계 변화와 생태 관련자료를 GIS DB로 구축하고 생태지도를 작성하였다. 생태지도 작성을 위해 1984년 11월 21일, 1997년 5월 17일에 촬영된 공간해상도 30m의 Landsat TM 위성영상과 국립지리원에서 발행된 1:25,000 수치지형도, 부산시에서 조사한 생물현황 자료를 바탕으로 DB를 구축하였다. 생태지도를 작성하기 위해, 첫째, 낙동강 하구 생태계 조사 보고서와 현재까지 진행된 생태지도에 대한 문헌 연구, 둘째, 시계열적 토지피복분류도 제작, 셋째, 동·식물상, 수질 등 생태계 항목별 BB 구축과 3단계 방식에 의한 생태계 평가, 최종적으로는 이러한 분석 결과를 바탕으로 생태계 관리를 위한 생태지도를 작성하였다. This study developed an ecological mapping technique with GIS database using the analyses of existing ecological survey reports and the change detection on the Nakdong river estuary. The data which are used to establish GIS DB include 2 Landsat TM images on Nov. 31, 1984 and May 17, 1997, 1:25, 000 topographical maps established by National Geography Institution and various ecological survey reports published by Busan metropolitan city government. The details for producing ecological map are as follows. At first, the current methods of ecomapping efforts and previous ecological surveys of Nakdong river estuary were carefully examined. Secondly, the land cover maps were created from the classified Landsat images of 1984 and 1997 for the spatiotemporal ecosystem analysis. Thirdly, the ecosystem was evaluated by using GIS ecological database based on the criteria of botany, zoology and water quality etc. Each criteria was reclassified into 3 stages which describe the overall quality of ecological condition. At last, the comprehensive ecological map was suggested as a prototype of ecosystem assesment and management tool with the discussion of further study. The findings of this study would be a milestone for preserving and managing the ecosystem.

고정층 석탄반응기의 수학적 모델링

이성철 한양대학교 에너지·환경기술연구소 1994 에너지·環境技術論文集 Vol.1 No.-

A literature review of existing models for moving-bed coal gasifiers and combustors was conducted, and three available 2-D codes were installed and tested. Predictions and sensitivity analyses of the 2-D code developed by Washington University (Bhattacharya et al., 1986) were performed. Based on the review, the proposed features of an advanced model incorporating detailed coal chemistry submodels were identified. One major difference between the proposed model and the existing models is that the proposed model will have separate gas and solids temperatures. As a foundation for developing the advanced model, equations were formulated for an improved model incorporating separate gas and solids temperatures, but not incorporating the detailed coal reaction chemistry submodels or detailed compositions for bed hydrodynamics. A preliminary review for effective transport properties for fixed beds was also completed for the advanced model.

GIS를 이용한 효과적인 항만시설물 관리 방안에 관한 기초연구 : 부산시 창고시설을 중심으로

이기철,신성필 동아대학교 건설기술연구소 1999 硏究報告 Vol.23 No.2

The objective of this study is to develop the methodology and database for Port Facilities located in Pusan Metropolitan City. The study is carried out by survey of Port Facilities from the Nov. 20th to Nov 27th, 1999 and the techniques of GIS. Based on the survey, a GIS database was developed showing the status(name, owner, address, phone, capacity etc) of Pusan Harbour warehouse and various opinion analyses for future information service for the logistic management. The study also suggested an effective and desirable way of spatial database development for Port Facilities. Through the study, this study proved the techniques of GIS is effective for Port Facilities Management.

SMOLDERING IGNITION OF FLAMMABLE SUBSTRATE

Yi,Sung-Chul,Kim,Hee-Taik,Ryu,Kyong-Ok 한국화재소방학회 1997 한국화재소방학회 학술대회 논문집 Vol.1997 No.-

A theoretical model for the interaction of the moving heat source and a solid substrate when they are in contact is described. for purposes of the model the substrate is assumed to act as a continuum and the Fourier equation for transient. three-dimensional conduction is solved using Laplace and Fourier transformations. Unlike most previous models, this model shows the explicit relations between the properties of heat source and that of the substrate. Since the size, shape and speed of heat source impact the ignition of substrate, considerable attention is devoted to evaluating these parameters. Results are presented which show the effects of the size, shape and speed of heat source on the substrate.

레진접착제를 도포한 상아질에 대한 합착용 시멘트의 전단결합강도

김교철,우이형,이성복,최부병 慶熙大學校 齒科大學 1995 慶熙齒大論文集 Vol.17 No.2

The purpose of this study was to confirm the formation of hybrid layer and resin tags in dentin tissue and the possibility of bonding between luting cements used for the prosthesis and the resinous surface coated with resin bonding agents to prevent the dentin hypersensitivity after abutment preparation. Some resin bonding agents, which may have the possibility of bonding with polyacrylic acid as a liquid ingredient of polycarboxylate and glass ionomer cements, were selected. All-Bond desensitizer containing NTG-GMA and BPDM, Scotch-Bond Multipurpose plus containing HEMA, and XR-bond containing organophosphate were selected as a coating agent. Dental cements were zinc phosphate, polycarboxylate, and glass ionomer cement. After the exposed dentin surface of premolars was ethced with 10% phosphoric acid and coated with resin bonding agents, the morphology of treated surfaces and the resin tags and hybrid layers on sectioned surfaces were observed by SEM. Shear bond strength between the resin bonding agents and 3 kinds of cements was measured 24 hours after bonding. On the debonded surfaces of the shear bond strength tested specimens, the cement tags and the bonding sites between the resin materials and cements were examined by SEM. Following conclusions were drawn 1. Coating of dentin with resin bonding agents had no effect on the shear bond strength of zinc phosphate cement. 2. Both of polycarboxylate and glass ionomer cements showed the increased shear bond strength by the dentinal coating with Scotch-Bond Multipurpose plus containing HEMA. However, in the case of dentinal coating with some agents containing NTG-GMA and BPDM or organophosphate, polycarboxylate cement exhibited the lowered shear bond strength, and glass ionomer cement showed the unchanged shear bond strength. 3. Complete obstructions of dentinal tubules were observed on the dentin coated with All-Bond desensitizer or XR-bond, but distinct shape of the orifices of dentinal tubules was observed consistently on the dentin coated with Scotch-Bond Multipurpose plus. 4. The hybrid layer was thickest on the dentin coated with Al1'Bond desensitizer, and the length of resin tags was longest on the dentin coated with Scotch-Bond Multipurpose plus. 5. On the debonded specimens which had been bonded with polycarboxylate cement or glass ionomer cement after coating with Scotch-Bond Multipurpose plus, the cement tags and the bonding sites between the resinous surface and the cements could be examined.

제주도 의료이용의 자체충족도에 관한 연구

이상이,홍성철 제주대학교 2002 社會發展硏究 Vol.17 No.-

핵간안근마비를 보인 중추신경계 크립토콕쿠스병 1례

이지영,김재일,김기선,강문철,이창민,양대웅,이근호,김상준 대한신경과학회 1997 대한신경과학회지 Vol.15 No.5

우수여자 유도선수들의 연간 트레이닝과 디트레이닝에 따른 무산소성 역치의 변화

홍관이,정정진,김학렬,김기진,조현철,손태열,노성규 龍仁大學校 體育科學硏究所 1992 體育科學硏究論叢 Vol.2 No.1

The seasonal variance for estimate of exercise intensity, energy expenditure, maximal oxygen uptake and anaerobic threshold of elite women judo players(Group Ⅰ:4,Group Ⅱ: 4) was measured during 3,5,7,9,10month. The results of this study is as follows. 1. Exercise intensity by %HRmax during seasonal training was shown range of 56.45-73.62, 65.56-82.15, 80.03-86.62, 62.06-68.83%HRmax, respectiveley, from 3 to 9month in the warm up, additional exercise, main exercise and cooling down. 2. Energy expenditure per min during seasonal training was shown range of 4.09-7.96, 5.41-8.66, 8.95-9.90 and 5.05-6.41Kcal/min, respectiveley, from 3 to 9month in the warn up, additional exercise, main exercise, main exercsie and cooling down. 3. Changes of maximal oxygen uptake(VO₂max)during seasonal training and detraining not significant difference between both group, and in the seasonal variance. However, maximal heart rate during detraining expressed significant difference(p<0.05) between both group. 4. Anaerobic threshold levels during seasonal training and detraining not significant difference between both group, and in the seasonal variance. However, AT-VE(1/min) and AT- work time(min) of group Ⅱ expressed significant difference(p<0.01) in the seasonal variance.

수종의 불소방출 수복재의 탈회억제 효과 및 불소침투에 관한 연구

김송이,최성철,최영철,김광철,박재홍 大韓小兒齒科學會 2010 大韓小兒齒科學會誌 Vol.37 No.3

자이오머(Giomer)는 레진강화형글라스아이오노머에 견줄 만큼 불소방출량이 많다고 하나, 우식예방 효과에 관한 연구들이 많지 않아 임상적용에 대한 근거가 부족한 실정이다. 본 연구는 자이오머(BF 군)를 포함하여 레진강화형글라스아이오노머(FF 군), 콤포머(DA 군)와 대조군인 콤포짓(FZ 군)의 우식억제 효과와 주변 치질로의 불소침투 양상을 비교하기 위하여, 공초점레이저주사현미경과 전자탐침미세분석기를 이용하여 각 수복재의 우식예방 효과를 비교하였으며, 다음과 같은 결과를 얻었다. 1. 수복물 주위 이차 인공우식에서 법랑질 외측병변의 깊이는 FZ 군에서 가장 깊었으며, BF 군이 가장 작게 나타났다(p<0.05). 2. 수복물과 법랑질 계면에 나타난 탈회억제층의 두께를 관찰한 결과 FZ 군이 가장 작게 나타났으며, FF, DA, BF 간에는 유의성 있는 차이를 보이지 않았다(p<0.05). 3. 법랑질에 침투된 불소농도는 BF, FF, DA의 순으로 높게 나타났다. 4. 상아질에 침투된 불소농도는 DA, BF, FF의 순으로 높게 나타났으며, 이는 상아질-수복물의 접착 계면에 영향 받는 것으로 보인다. The purpose of this study was to evaluate the effect of light cured fluoride-releasing materials on the inhibition of demineralization. In addition, the pattern of fluoride uptake of adjacent tooth structure was analyzed with EPMA. Eighty intact premolars were restored with Filtek Z250(control group, composite), Fuji Filling LC(RMGI), Dyract AP (compomer) and Beautifil II(giomer). Restored teeth were stored in distilled water for 30 days. Thensixty teeth(n=15) were exposed to demineralizing solution(pH 4.3). Demineralized teeth were bisected and polished. The specimens were observed with confocal laser scanning microscope. The depth of outer lesion and the thickness of inhibition zone were measured. Remained twenty teeth(n=5) were bisected for fluoride uptake analysis. The fluoride analysis were taken at enamel-restoration interface and dentin-restoration interface by electron probe micro-analyzer. The results are as follows: 1. The depth of outer lesion of Fuji Filling LC, Dyract AP, Beautifil II was shallower than that of Filtek Z250 at the margin of restoration(p<0.05). 2. The thickness of caries inhibition zone of Fuji Filling LC, Dyract AP, Beautifil II was greater than that of Filtek Z250 at the margin of restoration(p<0.05). 3. Fuji Filling LC, Dyract AP, Beautifil II groups showed the greater fluoride uptake into enamel and dentine around restoration than Filtek Z250 group. 4. In dentin the difference of fluoride concentration were greater than in enamel, and Dyract AP showed the greatest fluoride concentration in dentin.

제주시 일부 초, 중, 고등학생과 대학생들의 생체전기 저항법에 의한 체성분 조사

홍성철,이상이,현인숙 대한보건협회 2002 대한보건연구 Vol.28 No.2

Purpose : obesity is a frequent nutritional disorder in children and adolescent and its prevalence is increasing in Korea. The aim of this study was to measure body composition using bioelectical impedence in primaty, middle, high and college students in Cheju. Methods : We measured height, weight, and body composition(Fat %, WHR, Fat feee mass) by InBody 3.0 in 1,431 students aged 10-25 years. We also examined degree of obesity comparing standard weight for height, body mass index, and precent of body fat. Results : Fat free mass increased by aging in both sex, higher in male. Fat mass was highest in Primary school in male(12.09±4.86kg), college in female(16.03±4.22kg). Percent of body fat was highest in Primary student(21.64±8.02%), decreased middle(19.96±7.26%), high school(15.07±5.13%), and increased in college student(17.33±5.21%) in male, however, lowest in primary student(22.78±6.10%), increased by aging (middle;25.38±6.19%, high;27.61±5.27%, college;28.27±4.49%) in female. Percent of body fat was significantly higher in female except in primary school age. The prevalence of obesity based on fat % was highest in primary school student(primary, middle, high, college student; 33.3%, 23.3%, 7.6%, 8.2%) in male(≥25%), and highest in college student(11.1%, 26.6%, 32.3%, 38.6%) in female(≥30%), whereness, based on a standard weight for height(≥20%), 13.16%, 10.84%, 6.90%, 10.10% in male, 4.44%, 7.21%, 12.11%, 9.59% in female. Conclusion : It was necessary to evaluate obesity degree by body fat percentage, especially in adolescent and young female