국내산 및 중국산 십전대보탕 재료의 구조탄수화물과 식이섬유에 관한 연구

김기철,김지민,김대진,Kim Ki-Chul,Kim Ji-Min,Kim Dae-Jin 한국생명과학회 2005 생명과학회지 Vol.15 No.1

십전대보탕에 들어가는 한약재 10종을(국산 7종, 중국산 10종)을 수집하여 일반성분과 중성세제섬유소(neutral detergent fiber, NDF), 식이섬유(total dietary fiber, TDF; insoluble dietary fiber, IDF; soluble dietary fiber, SDF)를 분석하였다. 십전대보탕 재료 중 국내산 7종, 중국산 10종에 있어서 일반성분과 식이섬유는 국내산과 중국산간의 차이가 크지 않았다. 그러나 중성세제섬유의 경우 건조물 기준으로 국내산 $35.24\%$, 중국산 $58.64\%$로 차이가 크게 나타났다 국내산 7종의 총탄수화물(CHO)과 NDF 간에는 Y=0.32X+60.96, r=0.61(p<0.01), 총탄수화물(CHO)과 NFE간에는 Y=0.65X+32.88, r=0.76(p<0.001)로서 유의한 회귀식과 상관이 도출되었다. 그러나 총탄수화물(CHO)과 NFC간에는 Y=-0.07X+80.93, r=0.10로서 회귀식이 도출되었으나 유의성은 없었다. 중국산 10종의 총탄수화물(CHO)과 NDF간에는 Y=0.53X+49.64, r=0.69(p<0.001), 총탄수화물(CHO)과 NFE간에는 Y=0.50X+46.42, r=0.71 (p<0.01)로서 유의한 회귀식과 상관이 도출되었다. 그러나 총탄수화물(CHO)과 NFC간에는 Y=0.10X+78.21, r=0.10로서 회귀식이 도출되었으나 유의성은 없었다. 국내산 7종의 TDF와 IDF간에는 Y=0.96X+4.08, r=0.99(p<0.01), TDF와 SDF간에는 Y=-6.87X+62.97, r=0.51(p<0.01)로서 유의한 회귀식과 상관이 도출되었다. 중국산 10종의 TDF와 IDF간에는 Y=0.96X+3.14, r=0.99(p<0.01), TDF와 SDF간에 Y=-8.71X+58.96, r=0.50(p<0.01)로서 유의한 회귀식과 상관이 도출되었다. 국내산과 중국산 7종 식이섬유의 t-test 결과 TDF와 IDF는 평균이 양측검정결과 유의하게 다르지 않았으나 SDF는 평균이 유의하게 달랐지만 단측검정 결과 유의하지 않았다. This study was conducted to determine the total carbohydrate (CHO), nitrogen free extract (NFE), non fiberous carbohydrate (NFC) and ditery fiber (NDF, neutral detergent fiber; TDF, total dietary fiber; IDF, insoluble dietary fiber; SDF, soluble dietary fiber) of 17 kinds of domestic and Chinese herbs. The samples were dried at 60t for 24 hrs and ground to pass a 0.5mm screen. The contents of NFE was ranged from $85.73\%\;to\;57.57\%$, NDF was ranged from $85.72\%\;to\; 29.74\%$, CHO was ranged from $92.68\%\;to\;63.01\%$, TDF was ranged from $87.33\%$to 17.21, IDF was ranged from $86.37\%\;to\;14.56\%$, SDF was ranged from $6.06\%\;to\;0.97\%$ on domestic herbs in dry matter basis. NFE was ranged from $95.33\%\;to\;35.24\%$, NDF was ranged from $71.48\%\;to\;29.74\%$, CHO was ranged from $78.77\%\;to\; 35.24\%$, TDF was ranged from $86.43\%\;to\;16.22\%$, IDF was ranged from $85.98\%\;to\;13.04\%$, SDF was ranged from $4.13\%\;to\;0.45\%$ on Chinese herbs in dry matter. The several components of domestic and Chinese herbs were not significantly of TDF and IDF, but SDF was significantly by tow-tailed test. The correlationship of several herbs were r=0.99 between TDF and IDF (p<0.01), r=0.51 between TDF and SDF (p<0.01)on domestic herbs. The correlationship of 10 kinds herbs r=0.99 between TDF and IDF (p<0.01), r=0.50 between TDF and SDF (p<0.01) on Chinese herbs, respectively.

화천 지역의 수문분석을 위한 SWAT 모형의 적용성 평가

김기철,김종건,박윤식,허성구,유동선,김기성,최중대,임경재,Kim, Gi-Cheol,Kim, Jong-Geon,Park, Yun-Sik,Heo, Seong-Gu,Yu, Dong-Seon,Kim, Gi-Seong,Choe, Jung-Dae,Im, Gyeong-Jae 한국관개배수위원회 2007 한국관개배수논문집 Vol.14 No.2

For sustainable development at a watershed, environment friendly site-specific management practices need to be developed and implemented. The soil and Water Assessment Tool(SWAT)model has been world-wide used to estimate stream flow, sediment, and nonpoint source pollutant loads, and effects on water quality of different management practices. In this study, the SWAT model was used to estimate the flow resources at Hwacheon areas using Digital Elevation Model(DEM),Land use, precipitation ,wind ,maximum and minimum temperature, solar radiation, humidity of watershed The R2 value and EI value for the comparison of SWAT estimated flow and measured flow were 0.87 and 0.67 respectively for calibration period, and the R2 value and E1 value for validation were 0.75 and 0.67 respectively. The comparison results show what the SWAT model is applicable to simulate hydrology behaviors at this study watershed.

산업장 근로자의 근골격계 자각증상과 스트레스의 평가

김기철,박승정,장두섭,김삼태,김유철,권소희,정해경,송용선,이기남,Kim Ki-Chul,Park Sung-Jung,Jahng Doo-Sub,Kim Sam-Tae,Kim Yoo-Chul,Kwon So-Hee,Jung Hae-Kyoung,Song Yung-Sun,Lee Ki-Nam 대한예방한의학회 2004 대한예방한의학회지 Vol.8 No.1

This study was conducted to evaluated musculoskeletal subjective symptoms and the degree of stress of industrial workers to present fundamental materials of preventive oriental medicine for improving their health and quality of life. During the medical examination with oriental medicine method, presence of subjective symptoms of musculoskeletal pain, Psychosocial Well-being Index(PWI) and life style were checked by using questionnaire method in 474 industrial workers. The collected data were analyzed with crosstabs, ANOVA and T-test. The results were as follows; 1. In general differences according to musculoskeletal subjective symptoms, education level of high school graduation had significantly higher distribution than that of below middle school or above university graduation in the pain present group. 2. In the musculoskeletal subjective symptoms and the degree of stress, all of Factor1, Factor2. Factor3, Factor4. and PWI had higher score in pain present group than in pain free group and the difference was statistically significant. 3. According to degree of stress and general character of subjects, single and education level of high school graduation had high score in Factor2, Factor3 and PWI. Factor1 and Factor3 was high in income group of low 1.49 million won. Factor2, Factor4, and PWI was high significantly in income group of 1.50 - 2.99 million won. In job type, manufacturing worker group had significantly high score in Factor3. 4. In degree of stress and life style difference, there was significant difference in PWI score in the field of alcohol chinking, smoking, exercise, obesity except sleeping hours. In the present study. as a result, it is found out that musculoskeletal subjective symptoms present group had higher score in psychosocial stress across the fields than symptom-free group and it is recommended that continuous studies on the relationship of job-related musculoskeletal disorders and psychosocial stress should be performed for improvement and prevention of mental and physical health of industrial worke

돔 구조물의 지진응답 저감을 위한 중간 면진장치의 적용

김기철,김수근,강주원,Kim, Gee-Cheol,Kim, Su-Geun,Kang, Joo-Won 한국공간구조학회 2016 한국공간구조학회지 Vol.16 No.4

The seismic isolation system reduces the seismic vibration that is transmitted from foundation to upper structure. This seismic isolation system can be classified into base isolation and mid-story isolation by the installation location. In this study, the seismic behavior of dome structure with mid-story isolation is analyzed to verify the effect of seismic isolation. Mid-story isolation is more effective than base isolation to reduce the seismic responses of roof structure. Also, this isolation would be excellent in structural characteristics and construction.

분리저감형 유동화제를 이용한 준고유동 콘크리트

김기철,Kim, Gi-Cheol 한국건설안전협회 2005 建設 安全技術 Vol.33 No.-

돔 구조물의 지진응답 제어를 위한 TMD의 적용

김기철,강주원,Kim, Gee-Cheol,Kang, Joo-Won 한국공간구조학회 2012 한국공간구조학회지 Vol.12 No.1

본 연구에서는 지진하중을 받는 대공간 구조물의 지진응답을 저감시키기 위하여 돔 구조물에 대한 동조질량제어장치(TMD)의 적용성을 검토하였다. 이를 위하여 돔 구조물의 기본적인 동적특성을 가지고 있으며 가장 간단한 구조이기도 한 스타 돔 구조물에 수동형 TMD를 설치하여 지진응답 제어성능을 평가하였다. 본 연구에서는 KBC2009에 따른 인공 지진하중을 수평방향과 연직방향으로 가하여 스타 돔 구조물에 대한 지진응답을 분석하였으며 이를 바탕으로 TMD의 설치에 따른 스타 돔 구조물의 지진응답 제어성능을 분석하였다. 해석결과 다음과 같은 결론을 얻을 수 있었다. 지진하중의 방향에 반응하는 스타 돔 구조물의 진동모드 분석을 통하여 수동 TMD를 설치하는 것이 지진응답 제어에 있어서 효과적인 것을 확인할 수 있었다. Vibration control devices are classified into passive, semi-active and active device. TMD(Tuned Mass Damper) is one of the passive control device that is mainly used to reduce vibration level of building structure and bridge structure. In this study, the application of passive tuned mass damper(TMD) to seismic response control of dome structures has been investigated. Because star dome structure has primary characteristics of dome structures, star dome structure was used as an example dome structure that is subjected to horizontal or vertical seismic loads. From this numerical analysis, it is shown that seismic response are influenced by vibration modes and it is reasonable to install TMD to the dominant points of each mode. And it is found that the passive TMD could effectively reduce the seismic responses of dome structure.

상이한 지반조건을 갖는 아치구조물의 지진응답 분석

김기철,강주원,Kim, Gee-Cheol,Kang, Joo-Won 한국공간구조학회 2013 한국공간구조학회지 Vol.13 No.1

Spatial structures have the different dynamic characteristics from general rahmen structures. Therefore, it is necessary to accurately analyze dynamic characteristics and seismic response of spatial structure for seismic design of spatial structure. An arch structure is used as an example structure because it has primary characteristics of spatial structures. Multiple support excitation may be subjected to supports of a spatial structure because ground condition of spatial structures is different. In this study, the response analysis of the arch structure under multiple support excitation and simple support excitation is studied. By means of the pseudo excitation method, the seismic response is analyzed for long span spatial structure. It shows that the structural response is divided into two parts, ground displacement and structural dynamic response due to ground motion excitation. It is known that the seismic response of spatial structure under multiple support excitation and simple support excitation are the different in some case. Therefore, it has to be necessary to analyze the seismic response of spatial structure under multiple support excitation because the spatial structure supports may be different.

자동차용 도금강재의 저항 점용접부 특성

김기철,차준호,박화순,Kim Ki Choi,Cha Joon Ho,Park Hwa Soon 한국재료학회 2004 한국재료학회지 Vol.14 No.4

Resistance spot weldability of coated steels for automobile applications was investigated. Test samples were prepared from commercial products of 0.8 mm in thickness. Based on the tensile-shear test, surface quality examination and cracking behavior, it was clear that aluminized steels showed good weldability. Microstructural inspection revealed that the coated materials was piled up at the split zone in the welding of aluminized steels. It was also demonstrated that no weld crack was found in the aluminized steel weld metal even the welding was carried out with higher current. However, through thickness cracks were detected at the weld metal of zinc coated steel. Small particles were found on the crack surface of zinc coated steel weld metal. It was thought that zinc vapor played key role to form the weld crack.

인접건축물의 지진응답 제어를 위한 MR 감쇠기의 복합제어 모델

김기철,강주원,채승훈,Kim, Gee-Cheol,Kang, Joo-Won,Chae, Seoung-Hun 한국공간구조학회 2011 한국공간구조학회지 Vol.11 No.2

현재 건축 및 토목 구조물의 진동제어에 있어서 준능동제어에 대한 연구가 많이 수행되고 있으며 준능동제어 시스템은 수동제어와 능동제어의 장점을 가지고 있다. 최근 적은 전기 에너지로 제어가 가능한 MR 감쇠기가 개발되어 준능동제어 분야에 적용되고 있으며 이러한 MR 감쇠기를 스마트 감쇠기라 불리고 있다. 본 논문에서는 실시간으로 제어가 가능한 MR 감쇠기를 인접한 두 건축물 사이에 설치하여 제어성능을 알아보고자 한다. 또한, groundhook과 skyhook 제어 알고리즘을 결합한 복합제어 모델을 인접한 건축물의 진동제어에 적용하여 복합제어 모델의 제어성능을 알아보고자 한다. 복합제어 모델을 적용하여 인접한 두 건축물의 진동제어 성능을 분석한 결과, 복합제어 모델이 인접한 두 건축물의 진동제어에 매우 효과적인 것을 알 수 있었다. Many researchers have attempted to apply semi-active control systems in the civil engineering structures. Recently, magneto-rheological(MR) fluid dampers have been developed. This MR damper is one of semi-active dampers as a new class of smart dampers. This paper discusses the application of MR damper for seismic response control of adjacent buildings subjected to earthquake. Here, a controllable damping force of MR damper that is installed between adjacent buildings is applied to seismic response control. A hybrid model combines skyhook and groundhook control algorithm so that the benefits of each can be combined together. In this paper, hybrid control model are applied to the multi degree of freedom system representative of buildings in order to reduce seismic response of adjacent buildings. And the performance of hybrid control model is compared with that of others. It was demonstrated that hybrid control model or adjacent buildings with MR damper was effective for seismic response control of two adjacent buildings reciprocally.

하부구조의 강성변화에 따른 대공간구조물의 지진거동

김기철,강주원,고현,Kim, Gee-Cheol,Kang, Joo-Won,Ko, Hyun 한국공간구조학회 2010 한국공간구조학회지 Vol.10 No.3

대공간구조물은 일반 라멘구조와는 다른 동적특성을 가지고 있으며, 이런 동적특성에 관해 많은 연구가 수행되고 있다. 그러나 대부분의 연구는 특정 형태의 대공간구조물에 대해 수행되었으며, 내진설계를 위해 직접적으로 이용 가능한 연구결과는 매우 제한적이다. 본 연구에서는 대공간구조물의 기본적인 동적특성을 내재한 트러스-아치구조물을 대상으로 양단의 기둥의 길이가 다른 경우에 트러스-아치구조물의 지진응답변화를 분석하고자 한다. 양단 기둥 길이의 차이에 따라, 가속도 응답이 수평방향에 비해 수직방향에서 더 많은 영향을 받는다. 따라서 상부구조물을 지지하는 하부구조물의 강성이 다른 경우에 대공간구조물의 내진설계에 있어서 수직방향 응답에 대한 고려가 더욱 많이 요구된다. Large spatial structures have the different dynamic characteristics from general rahmen structures and many studies on dynamic behavior of it is conducted. But most studies was conducted about the particular shape of large spatial structures and, directly, the usable results of studies are very limited for seismic design of large spatial structures with the lower structure. So, this study is conducted about the truss arch structure that the basic dynamic characteristics of large spatial structure is inherent in, and the change of its seismic response is analyzed when columns have different length on both ends of it. According to the difference of column's length on both ends, the vertical acceleration response of truss arch structure is affected more than the horizontal acceleration response of it. Therefore, when the stiffness of lower structures that support the upper structure is different, the consideration of the vertical response is significantly required for the seismic design of large spatial structures.