경기도 용인시(경희대학교) 주변지역의 지하수 오염현황

오종민,김홍석,진현오,윤세철 경희대학교 환경연구소 1998 環境硏究 論文集 Vol.8 No.-

Recently, the concern about groundwater pollution is increasing. And, groundwater was one of the major water resource used as drinking water by eighty percent of the world population, and its utility as industry water, agriculture water, fresh water was increasing. But, when pollution material was found in housing well, by purifying polluted water, the area of doing thorough conservation management was few. Thus, if water resource being regard as unlimited source, the right view of nature and scientific utility were essential because of the problem of its value. The purpose of this study was that investigated groundwater quality pollution condition in the part areas of Kyunggi-do Suwon Si, Yong-In Si, proposed to efficient management plan for pollution occurrence prevention and groundwater quality development by surveying groundwater pollution source. The result of the study was that the groundwater by use purpose could systematically manage water quality since development beginning, management system about groundwater development with use can established.

공동주택 바닥충격음 차단성능 평가

윤세철,오종민 慶熙大學校 地球環境硏究所 2002 지구환경논문집 Vol.13 No.-

In apartment buildings, floor-impact sound has been regarded as the major source which induces complaints from residents. It is mainly due to the use of light-weight structures and the lack of researches in terms of the sound transmission characteristics through the structures of a receiving room. The vibration produced by the impact on one part of an apartment building would travel as far as the other parts of structure only with with a little alleviation. As a result, the impact sound from upstairs has been regarded as a main source of noise causing discontentment among occupants. This study was carried out to measure the floor-impact sound levels and evaluate the insulation performance of floor-impact sound for the K apartment buildings which complaints induced and the newly-founded Y apartment buildings. The major results of this study are as followers; 1. The comparison showed that the light-impact sound levels and the levels of estimated light-impact sound ranged from 51.0dB to 73.9dB and 60dB to 66dB in the K apartment buildings, 50.2dB to 70.6dB and 57dB to 62dB in the Y apartment buildings. 2. The levels of estimated impact sound exceed the criteria of light-impact noise insulation 58dB by 6∼8dB and the criteria of heavy-impact noise insulation 50dB by 4∼6dB in the K apartment buildings and 4dB, 1dB in the Y apartment buildings, respectively.

지하철 운행구간중 D철교 주변지역의 소음도 예측에 관한 연구

윤세철,오종민,이해경 경희대학교 환경연구소 1998 環境硏究 論文集 Vol.8 No.-

This study was carried out to predict and evaluate the outdoor noise levels around the D railway bridge of the subway line. The counter-measure for noise control was reviewed as the tunnel. The outdoor noise levels are generally calculated by subtracting sound transmission loss of the tunnel envelope from indoor noise levels. The coefficient of sound absorption of tunnel envelope was NRC 0.6 and sound transmission loss STC 23. Prediction of the noise levels around the D railway bridge was achieved by dividing the circumference into 10m×l0m regular grid spaces. The indoor noise levels at the tunnel ranged from approximately 45dB(A) to l07dB(A) and the outdoor noise levels 37dB(A) to 67dB(A) as peak sound level. In this study the maximum sound level at all locations around the subway line should not exceed 60dB(A) as energy equivalent sound level(Leq). As a result all points around the D railway bridge satisfied the noise level limit with the above tunnel.

M대교 건설에 따른 도로교통소음의 예측

윤세철,오종민 경희대학교 환경연구소 1999 環境硏究 論文集 Vol.9 No.-

This study was carried out to predict and evaluate the traffic noise levels around the newly-founded M bridge. The noise levels at all locations around the M bridge and the habitat for the seasonal birds should meet 55 ㏈(A) as the noise level limit. The traffic noise levels by M bridge ranged from 59 ㏈(A) to 72 ㏈(A) in 2002 year and 61 ㏈(A) to 74 ㏈(A) in 2011 year. The counter-measure for noise control was reviewed as the barrier of tunnel type and the general barrier and the noise levels by noise control ranged from 41㏈(A) to 53 ㏈(A) in 2002 year, 41 ㏈(A) to 54 ㏈(A) in 2006 year, 43 ㏈(A) to 55 ㏈(A) in 2011 and 2016 year and 45 ㏈(A) to 58 ㏈(A) in 2016 year. As a result, the noise levels around M bridge in 2016 year was predicted to exceed the noise limit 55 ㏈(A) and the appropriate measures by the control of the traffic and the average vehicle speed required for the satisfaction of the noise limit.

밀폐에 의한 기계설비 소음의 감쇠 예측

윤세철,오종민 경희대학교 환경연구소 1997 環境硏究 論文集 Vol.7 No.-

The considerations in the noise control by enclosure are the rise of temperature and sound pressure, transmission loss, absorption coefficient of the materials, the structure of the soundproof panels, an opening and coincidence frequency. But it is very difficult that we obtain the accurate data about those in design, so, the noise reduction after enclosing does not correspond. The difference of the noise reduction between the calculation and the measurement was average 4.8dB

순무(Brassica campestris ssp. rapa) 뿌리로부터 지질화합물의 분리 및 동정

방면호,오영준,유종수,한민우,정해곤,정태숙,최명숙,이경태,김세영,백남인 경희대학교식량자원개발연구소 2007 硏究論文集 Vol.26 No.1

순무 뿌리로부터 활성 물질을 분리 동정 하기 위하여 80% MeOH 수용액으로 추출하고 이를 여과, 감압 농축하여 MeOH추출물을 얻었다. 이를 EtOAc분획, n-BuOH분획, H_(2)O분획으로 나누었으며, EtOAc분획에 대해 silica gel column chromatography를 실시하여 3종의 지질화합물을 분리 정제하였다. ^(1)H-NMR, ^(13)C-NMR, DEPT spectrum 및 Mass spectrum등을 통하여 palmitic acid methyl ester(compound 1), linolenic acid methyl ester(compound 2), linoleic acid methyl ester(compound 3)으로 구조를 결정하였다. In order to isolate and identify the active compound from the Brassica campestris ssp rapa, the roots and the root skin were extracted with 80% aqueous MeOH, and the concentrated extract was partitioned with EtOAc, n-BuOH and H_(2)O. From the EtOAc fraction, three compounds were isolated through the repeated silica gel column chromatographies. From the result of spectral data including NMR and MS, the chemical structures of the compound were determined as palmitic acid methyl ester (compound 1), linolenic acid methyl ester (compound 2), linoleic acid methyl ester (compound 3).

맥주맥 F_1세대의 조합능력 검정

정원복,오주성,황필성,김수동,서세정,현종내,김대호 東亞大學校 2002 東亞論叢 Vol.39 No.-

맥주맥의 이면교잡에 의한 F_1세대에 대한 조합능력을 검정한 결과를 요약하면 다음과 같다. 8개 형질에 대한 GCA, SCA, RCA효과를 검정한 바 조합능력은 전 형질에서 GCA, SCA, RCA가 모두 유의하였는데 간장, 수장, 망장, 간직경, 곡핍폭, 1수립수 1000립중은 GCA가 SCA보다 크고, 품종간 GCA효과는 진양보리가 간장에서 부(-)이고, 삼도보리가 수장·망장·간직경·1000립중에서, 사천6호가 망장과 간직경에서, 진광보리가 곡립장에서, 두산29호가 곡립폭·1수립수·1000립중에서 각각 정(+)으로 높았다. SCA효과에서 수장은 두산29호×두산8호 조합이, 망장은 진양보리×두산29호 조합이, 간직경은 사천6호×진광보리 조합이, 곡립장은 진양보리×두산8호 조합이, 곡립폭은 진광보리×두산8호 조합이, 1수립수는 진양보리×삼도보리 조합이, 1000립중은 사천6호×두산8호 조합 및 두산29호×두산8호 조합이 각각 정으로 높았고, 간장은 삼도보리×진광보리 조합이 부로서 높았다. RCA효과에서 수장은 두산8호×남향보리 조합이, 망장은 진양보리×삼도보리 조합이, 간직겨은 사천6호×진양보리 조합이, 곡립장은 사천6호×진광보리 조합이, 곡립폭은 진양보리×삼도보리 조합이, 1수립수는 사천6호×두산29호 조합이, 1000립중은 진양보리×두산29호 조합이 각각 정으로 높았고, 간장은 사천6호×두산29호 조합이 부로서 높았다. Seven barley varieties in F_1 generation of the possible crosses among them were used to estimate the combining ability for eight characters, i.e., culm length, spike length, awn length, culm diameter, grain length, grain width, number of grains per spike and 1000 grains weight. Data for F_1 hybrid and parents were subjected to the analysis method proposed by Griffing. The results obtained were summarized as follows. mean squares of general combining ability(GCA), specific combining ability(SCA) and reciprocal combining ability(RCA) were significant for all characters observed. Mean squares of GCA were higher than those of SCA and RCA in culm length, spike length, awn length, culm diameter, grain width, number of grains per spike and 1000 grains weight. Variety Dusan#29 showed the highest GCA effect for number of grains per spike and positively high effects of GCA were observed from variety Samdo bori in spike length, awn length, culm diameter, 1000 grains weight, and from variety Jinkwang bori I grain length, from Dusan#29 in grain width, umber of grains per spike, 1000 grains weight. Also Jinyang bori showed negatively high GCA effect in culm length. In SCA effects, hybrids in Jinyang bori × Samdo bori were exhibited positively high for number of grains per spike and high SCA effects for 1000 grins weight were found positively in Sacheun#6×Dusan#8 and Dusan#29×Dusan#. In RCA effects, hybrids in Sacheun#6×Dusan#29 were exhibited positively high for number of grains per spike and high RCA effects for 1000 grains weight were found positively in Jinyang bori×Dusan#29.

강직성 슬관절에서의 슬관절 전치환술

조우신,박종희,김정민,오세관 대한슬관절학회 2003 대한슬관절학회지 Vol.15 No.1

목적: 강직이 동반된 슬관절염 환자에서 슬관절 전치활술의 문제점, 결과 및 합병증을 분석하고자 하였다. 대상 및 방법: 1994년 1월부터 2000년 12월까지 슬관절 강직(운동 범위 50도이하)이 있는 환자에게 슬관절 전치환술을 시행하여 2년 이상 추시가 가능하였던 16례를 대상으로 하였다. 수술은 관절 강직이 발생한지 평균 12.2년(1~40년)에 시행하였으며, 추시기간은 평균 3.3년(2~6년)이었다. 16례 중 남자 3례, 여자 13례였고, 평균 나이는 55.8세(34세~75세)였다. 감염에 의한 후유증 6례로 가장 많았고 그 외 퇴행성 관절염 4례, 외상 후 관절염 3례, 류마티스성 관절염 3례의 순이었다. 술 후 평가는 추시기간 중의 운동 범위와 HSS score 및 합병증을 분석하였다. 결과: 관절 운동 범위는 술 전 평균 31.6도(0~50도)에서 추시시 평균 95.4도(80~120도)로 증가하였으며, 1례에서만 5도의 굴곡 구축이 있었다. HSS score는 술 전 평균 59.6점(43~76점)에서 추시시 평균 84.6점(76~92점)으로 향상되었다. 1례에서 수술 중 슬개건 부분파열이 있었으나 보조기 착용과 적극적 재활로 술 후 1년째 90°의 관절 운동이 가능했다. 표재성 감염 1례는 창상의 변연절제술 후 피부이식으로 치유되었고, 심부 감염된 3례는 추후 관절 유합술을 시행하였다. 결론: 슬관절 전지환슬은 강직된 슬관절의 기능을 회복시킬 수 있는 좋은 술기이지만 감염등의 합병증을 고려해서 시행되어야 한다. Purpose: To evlauate the results of TKRA (Total knee replacement arthroplasty) for the treatment of stiff knee. Methods & Materials : TRKA has been performed for 18 cases of stiff knee ( ROM < 50° ) between January 1994 and December 2000. 16 cases which have been followed up for more than 2 years were analysed. Average follow-up was 3.3 years(2~6 years). 3 were male and 13 female. The average age was 55.8 years(34~75 years). Sequales of infection were most with 6 cases and followed by osteoarthritis (4 cases, 2 cases had been performed arthroscopic debridement) and rheumatoid arthritis (3 cases) and traumatic arthritis (3 cases) in order. TKRA was performed on average 12.2 years (1~40 years) after knee stiffness has been developed. We evaluate the results with ROM, HSS score and complications. Results : Average ROM was increased from 31.6°(0°~50°) preoperatively to 95.4°(80°~120°) postoperatively. 5° of flexion contracture was present in only 1 cases. Average HSS score was improved from 59.6 points preoperatively to 84.6 points postoperatively. The patella tendon was partially ruptured in 1 case surgery, but by brace application and rehabilitative exercise, ROM was improved to 90°, 1 year post operatively. There were 1 superficial skin infection which was resolved by revision of wound and skin graft, and deep infection in 3 cases, which needed knee fusion finally. Conclusion : TKRA is a good method for improving function in knee stiffness although infection risk is high.

풍화에 따른 퇴적암의 강도 변화

배우석,이봉직,오세욱,이종규 한국산업안전학회 2003 한국안전학회지 Vol.18 No.1

The failure of rock slopes were influenced by weathering, which causes change in the shear strength. The weathering is also directly related to slaking and swelling characteristics. In the paper, the core of diameter 10㎝ was obtained by digging on rock slope of Kong-ju in Korea and the EDX (Energy Dispersive X-ray spectrometer) analysis was carried out to verified element of chief rock-forming minerals. Uniaxial compression tests, slaking tests, and point load test are performed to study engineering characteristics of conglomerate and red shale. As a results of slaking test, slaking index of conglomerate indicate range of 85.11-99.58 and shale indicate 58.37-99.23.Therefore, it is recognized that the resistance of shale to weathering decreases in shallow depth and it greatly influences the strength of rock. The result of uniaxial compression test and point load test show that the strength of sedimentary such as conglomerate and red shale has an influence on both weathering and saturation.

국가 대표급과 제주도 고교 대표급 수영선수들의 그랩 스타트의 운동학적 분석

김철원,김승곤,오만원,임상용,김성찬,이창준,남사웅,이세형,류재청,신석종,김세민 濟州大學敎 體育科學硏究所 1998 체육과학연구 Vol.4 No.-

The purpose of the study was to undertaken to analysis the Grab starting technique between national representive team(3) and Cheju's representive team(3) with 3D cinematography. The conclusions obtained were as follows: Cheju's showed more elapsed time than national representive team on starting block. and more vertical than horizontal direction of COG position, more concentrated vertical velocity & acceleration than forward direction. Therefore It is necessory for cheju's to train balanced trust force in horizontal and vertical direction in grab starting technique.