http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 윤창연(Chang-Yeon Yun) (검색결과 34 건)
- 무료
- 기관 내 무료
- 유료
-
-
-
공동주택 현장 측정자료를 활용한 중량충격원의 바닥충격음 차단성능 비교
윤창연(Chang-Yeon Yun),연준오(Jun-Oh Yeon),김명준(Myung-Jun Kim) 한국소음진동공학회 2014 한국소음진동공학회 논문집 Vol.24 No.8
Notification 2013-611 of MOLIT has come into effect. It relates primarily to new standard impact source. In this study, an in-depth experimental analysis of the difference between a bang machine and an impact ball was performed via field testing of shear wall and flat plate structure at 51 sites. This paper focuses on the difference in single number quantities between a bang machine and an impact ball. At wall thicknesses of 180 and 210 mm in shear wall structure, the single number quantities exhibited differences of 3.1 and 4.5 dB, respectively, and at thicknesses exceeding 250 mm in flat plate structure, the difference was constant at 4.6 dB. With regard to flat plate structures, the single-index difference increased up to 11 dB as the thickness of the floor slab increased. In general, the highest level of contribution for the bang machine was 63 Hz, irrespective of thickness determining bandwidth. The highest level for the impact ball were 63 Hz and 125 Hz. In future research, when reviewing additional field performance measurement data, it will be necessary to consider a detailed examination instead of the current method of uniformly adding 3 dB for all thicknesses and types of structures.
-
-
-
-
공정시스템 이동현상 화학공정안전 / 전기자동차용 축전지의 열적 특성 모델링
윤창연(Chang Yeon Yun),신치범(Chee Burm Shin),양철남(Cheol Nam Yang),박성용(Seong Yong Park),(S . V . Berezhnoj) 한국화학공학회 2000 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.38 No.5
A three-dimensional modeling was carried out to investigate the effects of operating conditions, ambient conditions, and design factors on the thermal behavior of an electric-vehicle(EV) battery. Thermal conductivities of various compartments of the battery were estimated based on the equivalent network of parallel/series thermal resistances of battery components. Heat generation rate was assumed to be uniform throughout battery electrodes. The maximal temperatures within the battery at various operating conditions were calculated in order to check whether the operating temperature of the battery is within acceptable range. In addition, the relation between the surface temperature of the specific region and the maximal temperature of the battery interior was obtained so that the measurement of the surface temperature may be used to predict the maximal temperature of the interior. The results of this study may be useful for the optimal design of the thermal management system of an EV battery.
-
식물 생장 촉진 활성을 가진 인산분해 미생물 Pantoea 종의 분리 및 특성 규명
윤창연(Chang Yeon Yun),정용화(Yong Hwa Cheong) 한국생명과학회 2016 생명과학회지 Vol.26 No.10
식물생장촉진미생물(PGPR)은 농업생산성에 전세계적으로 매우 중요한 기작과 기능을 하는 것으로 알려져 있다. 이들 미생물들은 식물생장조절, 생물비료, 식물의 병 저항 및 방제 등 다양한 기작으로 식물생장을 촉진하면서 유용하게 이용되고 있다, 본 논문에서는 토양으로부터 네 종류의 서로 다른 Pantoea 종을 분리하여 식물생장 특성을 규명하고자 하였다. 16S rDNA 유전자의 분석에 의하면, 이들은 각각 Pantoea ananatis, Pantoea citrea, Pantoea dispersa, Pantoea vagans으로 확인되었고 각각 Pa1, Pc1, Pd1, Pv1으로 명명하였다. 분리된 모든 종들은 pH 5정도의 수치를 보이는 접종 1일차에 매우 높은 인산 분해 활성을 보였으며 배지의 pH 감소와 높은 상관성을 보였다. 또한 네 종류의 모든 Pa1, Pc1, Pd1, Pv1종은 각각 85.3±16.3 ㎍/ml, 183.9±16.8 ㎍/ml, 28.8±17.3 ㎍/ml, 114.1±16.5 ㎍/ml 농도의 매우 높은 인돌 아세트산 생성활성을 보였다. 지베렐린 생성의 경우 Pa1, Pc1와 Pd1는 각각 331.1±19.2 ㎍/ml, 288.5±16.8 ㎍/ml, 309.2±18.2 ㎍/ml 농도로 높은 활성을 보였지만, Pv1는 10.2±11.5 ㎍/ml 농도의 비교적 낮은 생성활성을 보였다. 또한 모든 분리 종들은 어린 상추식물의 경우 생체량의 32~37%, 상층부 길이의 10~15% 생장을 촉진하는 활성을 보이므로 이들 분리된 미생물을 잠재적으로 식물생장촉진을 위한 미생물비료제재로 사용할 수 있다고 생각된다. Plant growth-promoting rhizobacteria (PGPR) have gained worldwide importance and acceptance due to their agricultural benefits. These microorganisms are potential tools for sustainable agriculture, with effects on plant growth, biofertilization, induced systemic resistance, and biocontrol of plant pathogens. In this study, four different Pantoea species were isolated from field soil, and their plant growth-promoting characteristics were studied. Based on 16S rDNA gene sequencing analyses, the se were grouped into Pantoea ananatis, Pantoea citrea, Pantoea dispersa, Pantoea vagans and named as Pa1, Pc1, Pd1, Pv1, respectively. All of these strains have their ability for solubilization of insoluble phosphate depending on pH decrease at the range around pH 5 at 1days after inoculation and production of plant hormone indole acetic acid (IAA) with 85.3±16.3 ㎍/ml of Pa1, 183.9±16.8 ㎍/ml of Pc1, 28.8±17.3 ㎍/ml of Pd1 and 114.1±16.5 ㎍/ml of Pv1, respectively. Pa1, Pc1 and Pd1 also have high activity for production of gibberellin (GA3) hormone with 331.1±19.2 ㎍/ml of Pa1, 288.5±16.8 ㎍/ml of Pc1, 309.2±18.2 ㎍/ml of Pd1, but Pv1 does not. Furthermore, all these species have significantly promoted the growth of the lettuce seedling plants at the range around 32~37% for fresh weight and 10~15% for shoot length enhancement, so that these microbe could be used as a potential bio-fertilizer agents.
-
윤창연(Chang-Yeon Yun) 대한설비공학회 2014 설비공학 논문집 Vol.26 No.3
To assess a various of workplace noise environment in the tunnel construction site, the measurement is performed while tunnel constructing work. This study focuses on the sound attenuation according to the sound frequency characteristics and the distance from various works in the tunnel. Also, the noise distribution while blasting work is measured according to distance in this study. In addition, the boring processing, muck treatment, and tunnel lining by distance are measured for the noise distributions.
-
ScienceON연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
