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류성훈,김경회,이인철,Ryu, Sung-Hoon,Kim, Kyung-Hoi,Lee, In-Cheol 해양환경안전학회 2016 海洋環境安全學會誌 Vol.22 No.2
본 연구에서는 하구 염습지 생태계 복원 및 조성을 위한 기초적 연구로서, 낙동강 하구 사주섬인 진우도에 서식하는 갈대의 서식환경 특성을 파악하기 위하여 저질의 함수량, 입도분포, pH, 영양염 농도($NH_4-N$, $PO_4-P$), 지하수위, 지반고, 갈대 개체수 및 최대 높이 등의 조사를 실시하였다. 조사결과 연구대상 지역의 저질 입경 및 함수량이 갈대 서식환경에 미치는 영향은 적은 것으로 나타났으며, pH는 식생대와 비식생대 정점의 차이가 없었고, $NH_4-N$와 $PO_4-P$ 농도도 정점별 차이가 없었다. 식생대 영역에서 해안선 쪽으로 갈수록 지반고가 낮으며 개체수는 감소하였고, 지하수위는 높게 나타났다. 따라서 낙동강 하구 염습지의 갈대서식 환경에 영향을 미치는 주요인자는 지반고와 지하수위가 크게 기여하는 것으로 나타났다. In this paper, as a basic research for the restoration and construction of easuary saltmarsh, To observe the habitat environment for reed, we observed sediment environment (Particle size, water content, pH, nutrient analysis ($NH_4-N$, $PO_4-P$)), ground water level, ground level, individual numbers of reed, maximum reed height. As a result of this study, sediment particle size and moisture content of soil on the study area not effected reed habitat, pH showed no difference in each site. $NH_4-N$ and $PO_4-P$ concentration also no difference in each site. Ground level of reed habitat area is more higher than none reed habitat. However Ground water level of reed habitat area is more lower than none reed habitat. As a results of analyzing the influence factors for reed habitat in Nakdong estuary saltmarsh, ground water level and ground level is most influenced factor for reed habitat.
류성훈,김경회,이인철,Ryu, Sung-Hoon,Kim, Kyung-Hoi,Lee, In-Cheol 해양환경안전학회 2011 海洋環境安全學會誌 Vol.17 No.3
본 연구는 낙동강 하구역의 사주지형 변화를 예측하기 위한 기초적 연구로서 하천유량의 변화에 따른 부유사의 물질수지에 대하여 검토하였다. 낙동강 하구역의 부유사 물질수지는 갈수기시 60,708 kg/day가 유입하고, 홍수기는 306,892 kg/day가 외해를 통하여 유출하는 것으로 산정되었다. 낙동강 하구역은 전반적으로 갈수기 및 평수기에 부유사의 유입, 홍수기에 부유사의 유출이 반복 되지만, 사주지형 주변에서는 부유사의 유입과 유출 거동이 복잡하게 나타나 장기 지형변동 모니터링이 필요한 것으로 나타났다. To predict the deposition characteristic in the Nakdong river estuary, the material budget of Suspended Solid(SS) was investigated with the amount of Nakdong river discharge being set as dry season and flood season. The results of material budged of SS in dry season and flood season were 60,708 kg/day(inflow) and 306,892 kg/day(outflow), respectively.
류성훈,조정우,박진영,이재욱,정명식,송창헌,김정규,송재준 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.
To minimize social cost and to avoid existing obstacles (e.g., buildings, buried pipes, rivers, and ocean), cable and electricity tunnels are constructed mainly using trenchless technology. We have developed a new method for micro-tunnel excavation using a multihammer drilling machine and identified the optimum operating conditions of the system. A linear percussion testing system was constructed to acquire rock drilling data. The tests were conducted under various air pressures and RPMs consistent with field conditions. Three classes of rock specimens in terms of strength (i.e., hard, medium, and moderate rock) were tested. The test results yielded the optimum operating conditions of the multi-hammer drilling machine according to rock strength.
노인의 우울 • 불안 및 인지기능에 미치는 인자들의 영향에 관한 연구
류성훈,이귀행,오상우 대한신경정신의학회 1990 신경정신의학 Vol.29 No.4
This study was to investigate the influences which several sociocultural factors and physical states had on the anxiety, depression and cognition of the aged. The relationship among the anxiety, depression and cognition was also evaluated. The subjects were 509 aged who were 60 years old or more and lived in JeonJu-Iri areas. The authors employed Spielberger’ s State-Trait Anxiety Inventory for anxiety. Beck Depression Inventory for depression and Folstein’ s Mini-Mental State Examination for cognition. The duration of this study was from March 5 to April 25, 1989. The results were as follows * 1) The group of institutional residence showed lower scores state anxiety trait anxiety(p <C.05) and cognition(p<C.00l) than the group of familial residence. Both groups showed no difference on depression. 2) The group with physical illness showed higher score of state anxiety, trait anxiety and depression and lower scores of cognition than the groups without physical illness(p<C. 001). 3) Female group showed higher score of depression and lower score of cognition than male group(p〈.001). There was no difference on state anxiety and trait anxiety. 4) Education level showed negative correlation with state anxiety(p〈.05), depression(p < .00l) and positive correlation with cognition(p<.00l) and no significant correlation with trait anxiety. 5) In the group of institutional residence, the duration of institutional residence showed negative correlation with cognition(p〈.05) and no significant correlation with state anxiety, trait anxiety and depression. 6) The amount of personal expenses per month showed negative correlation with state anxiety, trait anxiety and depression and positive correlation with cognition(p〈.001). 7) State anxiety, trait anxiety and depression showed positive correlation one another and cognition showed negative correlation with anyone of the above three each other(p<C 001)
류성훈,이인철,김경회,윤한삼,Ryu, Sung-Hoon,Lee, In-Cheol,Kim, Kyung-Hoi,Yoon, Han-Sam 해양환경안전학회 2014 해양환경안전학회지 Vol.20 No.6
본 연구에서는 갯벌토 및 준설토를 기질로 이용한 Mesocosm 실험을 통하여 염생식물의 서식안정성을 평가하였다. Mesocosm 실험구는 기질 및 식생의 식재 여부에 따라 Mesocosm A(갯벌토+퉁퉁마디 식재), Mesocosm B(준설토), Mesocosm C(준설토+퉁퉁마디 식재)로 조성하였다. 그리고 Mesocosm 실험구 내 염생식물의 서식안정성을 평가하기 위해 수질(COD, T-N, T-P, 수온, 염분), 저질(COD, T-N, T-P), 식생성장률의 서식환경 인자에 대한 모니터링을 실시하여 서식안정성지수(HSI)를 산정하였다. Mesocosm C에서의 HSI는 0.87~0.95로서 Mesocosm A에 비하여 상대적으로 HSI가 높게 산정되어, 준설토를 이용한 해안염습지의 복원/조성에 이용될 수 있을 것으로 평가되었다. In this paper, it was constructed the halophyte Mesocosm experimental which was used tidal flat and dredged sediment as a substrate material. Depending on the vegetation and substrate material of Mesocosm, Mesocosm A(tidal flat sediment + Salicornia herbacea), Mesocosm B (only dredged sediment), Mesocosm C(dredged sediment + Salicornia herbacea). Monitoring was carried out of Warter quality factots(Chemical Oxygen Demand(COD), Total Nitrogen(T-N), Total Phosphorus(T-P), water temperature, salinity), Sediment factors(Chemical Oxygen Demand(COD), Total Nitrogen(T-N), Total Phosphorus(T-P)) and growth of Salricornia herbacea. Habitat Stability Index of vegetation was calculating by using the monitoring results. HSI of Mesocosm C was calculated from 0.87 to 0.95 as compared to the relatively high HSI in Mesocosm A, it was evaluated to be able to be used in the restoration and construction of the coastal salt marsh with dredged sediment.