http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이현승(Hyunseung Lee),김표상(Pyosang Kim),김현수(Hyeonsu Kim),성동훈(Donghoon Seoung),이현우(Hyunwoo Lee),이용문(Yongmoon Lee) 대한지질학회 2021 대한지질학회 학술대회 Vol.2021 No.10
무등산 지역은 광주광역시 동부와 전라남도 화순군 서부 및 담양군 남부지역이 만나는 곳에 위치한 무등산(1,187m)과 그 주위 지역을 포함하는 곳으로, 본 연구지역은 무등산 일대의 중생대 화성활동으로 형성된 암석을 중심으로 이루어졌다. 무등산 일대의 대표적인 암상으로 중생대 백악기 석영 안산암, 석영반암, 미문상 화강암, 무등산 용암이 분포하고 있다. 암석화학적으로 미문상 화강암은 화강암 내지 화강섬록암에 해당하며 무등산 용암은 안산암질 용암에 해당한다. 무등산은 암석학적으로 많은 연구가 되어있으나, 광물학적인 연구는 미진하여 무등산 일대에 대한 광물학적 연구를 실시하였다. 전남 화순군에 위치한 안양산을 포함하여 광주광역시 무등산 지왕봉, 의상봉, 낙타봉, 바람재, 풍암재, 입석대, 백마능선, 얼음바위에서 채취한 암석시료를 X-선 회절분석(X-ray diffraction, XRD), 에너지 분산 X-선 분광법(Energy Dispersive X-ray Spectroscopy, EDS) 분석을 실시하여 결정학적 특성을 알아보았다. XRD 분석결과 모든 시료에서 사장석과 석영이 가장 우세하게 관찰되었으며, 특징적으로 고온에서 급랭하여 형성되는 광물인 Sanidine과 Cristobalite가 minor phase로 관찰되었다. EDS분석결과로는 규소 및 산소의 원자비율이 80% 이상으로 많은 양을 차지하고 있었으며, 알루미늄, 포타슘 등의 순서로 분포하였다. 입석대에서는 다른 지역에서는 전혀 관찰되지 않았던 철과 마스네슘의 비율이 각각 약 1.4%와 0.4%로 관찰되었다.
생체 신호 측정을 위한 섬유전극의 형태에 따른 전기적 특성 분석 및 비교
이영재(Youngjae Lee),이강휘(Kanghwi Lee),이정환(JeongWhan Lee),강다혜(Dahye Kang),조하경(Hakyung Cho),조현승(Hyunseung Cho),이주현(Joohyeon Lee) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.10
Many kinds of electrodes have been developed in various forms and shapes for measurement of bio potential signal. Textile electrode has benefit of collect long term data monitoring because of it is non consciousness, convenient and do not occur skin irritation. However, It is very difficult to acquire available data due to high impedance of electrode and unstable skin-electrode contact which generate motion artifact. Also snap button which usually used as mediator between textile and measurement device cause change of electrical characteristics. In this paper, we inflated textile electrode to stabilize contact and add conductive silver paste between textile and snap button to improve conductance. To compare the performance of two methods, flat or inflated and add conductive paste or not, four types of electrodes are tested on each impedance and SNR by ECG measurement. In result, the first type electrode which flat and non-conductive paste showed the worst performance and the last type electrode which is inflated shape and contain conductive paste show the best performance.
Study of fibroblast growth factor 2 administration in bleomycin induced pulmonary fibrosis mice
Se Bi Lee,Hyeokku Lee,Jungyu Baek,Eunhyeok Choi,Hyunseung Lee,Juhyeok Hong,Jaehyun Kim,Jeong Yun Park,Gichang Jeong,Jieun Jeon,Jooyeon Lee,Jaehyun Park,Jimin Jang,Sang-Ryul Cha,Se-Ran Yang 한국실험동물학회 2023 한국실험동물학회 학술발표대회 논문집 Vol.2023 No.2
Hyunseung Hwang(황현승),Sewoong An,Minh Duy Pham,Meiyan Cui,Hyein Lee,Byungkwan Lee,Jeesang Myung,Jaewook Shin,Changhoo Chun 한국원예학회 2021 한국원예학회 학술발표요지 Vol.2021 No.10
Transplant production in plant factories has increased to overcome unfavorable environments, including high temperatures in summer and a lack of sunlight in winter. To successfully apply plant factory using artificial light (PFAL) for the production of high-quality grafted transplants of fruit vegetables should establish optimal environmental conditions. The effects of environmental factors, such as light intensity, light quality, photoperiod, and temperature, on plants have been studied individually to control plant growth in a closed cultivation system. However, a few studies have investigated the application of more economical white light-emitting diodes (WLEDs) and the combined effects of environmental factors on plant growth and morphology changes. In chapter one, lighting systems using WLEDs were established, and the effects of warm and cool WLEDs at various ratios on the growth of cucumber, tomato, and watermelon seedlings that would be used as scions and root stocks for grafted transplant production were examined. Four WLEDs were specifically manufactured for this study by adjusting the numbers of installed warm- and cool-white light chips: W1C0 (only warm-white light chips), W3C1 (warm-:cool-white light chips = 3:1), W5C2 (warm-:cool-white light chips = 5:2), and W1C1 (warm-:cool-white light chips = 1:1). The seedlings cultivated under treatment W1C1 had the shortest hypocotyls among the three tested vegetables. The hypocotyls of scions and rootstocks of tomato and watermelon were shortened in the order of W1C0, W3C1, W5C2, and W1C1, that is, in the same order with an increased proportion of cool-white light. The stem diameters were not significantly different except in tomato scions and watermelon rootstocks. In chapter two, the growth and morphology of tomato, red pepper, cucumber, gourd, watermelon, and bottle gourd seedlings that would be used as scions and/or root stocks for grafted transplant production were examined under different supplemental far-red (FR)-enriched WLED lights. The specifically manufactured WLED lighting fixtures consisted of different numbers of cool-white and FR light chips adjusted at ratios of 5:0, 5:1, 5:2, and 5:3. The phytochrome photostationary state (PSS) values that resulted in the maximum hypocotyl length ranged from 0.69 to 0.77 in tomato and red pepper seedlings. Although the hypocotyl lengths of cucumber and watermelon seedlings were also greatly affected by PSS, the PSS values resulting in the maximum hypocotyl length were lower than those found in tomato and red pepper seedlings. This suggests that FR-enriched WLEDs could be used to control the growth and morphology of vegetable seedlings with some variations among plant species and cultivars. In chapter three, the growth of tomato and red pepper seedlings was examined under different daily light integrals (DLIs) and day and night temperatures (DIFs) using a selected WLED lighting fixture. The seedlings were grown under different photoperiods with five different photon flux densities (PFDs) at an air temperature of 25/20°C. Increasing the DLI from 4.32 to 21.6 mol·m<SUP>-2</SUP>·d<SUP>-1</SUP>, either by increasing the photoperiod or PFD, improved seedling growth in both species. Under the same DLI conditions, tomato seedling growth was significantly enhanced with increased photoperiod and decreased PFD. Under higher DLI conditions, the reduced growth due to higher PFD indicated that excessive light energy was a limiting factor. The seedlings were also grown under three different air temperatures, 23/20, 25/20, and 27/20°C (photo-/dark periods), with five different PFDs. At 23/20 and 25/20°C, tomato seedlings showed a similar correlation between plant growth and an increase in PFD. At 27/20°C, however, the slope of the curve was flatter than those found in other treatments. On the other hand, red pepper seedlings showed similar correlation curves between growth and PFD at all tested air temperatures, and they accumulated more d
Lee Hyein,박선우,CUI MEIYAN,Lee Byungkwan,Minh Pham Duy,Hwang Hyunseung,전창후 한국원예학회 2023 Horticulture, Environment, and Biotechnology Vol.64 No.2
The lighting source is one of the most critical environmental elements in a plant factory for plant production. In this study, the narrow spectrum of blue LEDs (B) was added to mint-white LEDs (MW), resulting in diff erent spectral distributions of white lights. Strawberry propagules and runner plants were grown for 21 days under 100% MW, 80% MW and 20% B, 50% of each MW and B, or 100% B to identify the eff ects of additional blue to white LEDs on their growth. Additionally, the propagation periods for three runner plants were recorded to achieve greater effi ciency with these lighting treatments. As a result, propagules and runner plants showed the greatest growth and development in the 80% MW and 20% B. The same lighting treatment had the shortest propagation cycles in the 1st, 2nd, and 3rd runner plants, 13.2, 24.9, and 35.2 days, respectively, indicating that growth promotion reduces the propagation cycle. However, 100% B caused runner growth retardation on strawberry plant and this resulted the prolongation of propagation cycle. There was no signifi cant diff erence in net photosynthetic rate for propagules, however, the runner plant was signifi cantly lowest in 100% MW. The intercellular CO2 concentration and stomatal conductance to CO 2 transfer of runner plants showed signifi cant diff erences similar to net photosynthetic rate. These experimental results suggest that the optimal amount of blue light could promote strawberry plant growth and strawberry runner plants’ growth.
Two-Phase Cycle DBA (TCDBA) for Differentiated Services on EPON
LEE, Hye Kyung,YOON, Won-Jin,LEE, Tae-Jin,CHOO, Hyunseung,CHUNG, Min Young The Institute of Electronics, Information and Comm 2009 IEICE TRANSACTIONS ON COMMUNICATIONS - Vol.92 No.9
<P>The Ethernet passive optical network (EPON), which is one of the PON technologies for realizing FTTx (Fiber-To-The-Curb/Home/Office), is a low-cost and high-speed solution to the bottleneck problem that occurs between a backbone network and end users. The EPON is compatible with existing customer devices that are equipped with an Ethernet card. To effectively control frame transmission from optical network units (ONUs) to an optical line termination (OLT), the EPON can use a multi-point control protocol (MPCP) with control functions in addition to the media access control (MAC) protocol function. In this paper, we propose a two-phase cycle dynamic bandwidth allocation (TCDBA) algorithm to increase the channel utilization on the uplink by allowing frame transmissions during computation periods, and combine the TCDBA algorithm with the queue management schemes performed within each ONU, in order to effectively support differentiated services. Additionally, we perform simulations to validate the effectiveness of the proposed algorithm. The results show that the proposed TCDBA algorithm improves the maximum throughput, average transmission delay, and average volume of frames discarded, compared with the existing algorithms. Furthermore, the proposed TCDBA algorithm is able to support differentiated quality of services (QoS).</P>
Lee Byungkwan,PHAM MINH DUY,CUI MEIYAN,Lee Hyein,Hwang Hyunseung,Jang Inbae,전창후 한국원예학회 2022 Horticulture, Environment, and Biotechnology Vol.63 No.6
The eff ects of light intensity and photoperiod, and their combination as daily light integrals (DLI) on the growth and physi- ological traits of Panax ginseng seedlings were investigated to establish a light environment for seedling production. Strati- fi ed seeds of Panax ginseng ‘Chunpoong’ were sown. The seedlings were cultivated for 20 weeks using warm-white LEDs with DLI from 1.44 to 10.94 mol m −2 d −1, which are combinations of three light intensities (50, 120, and 190 μmol m −2 s−1) and three photoperiods (8, 12, and 16 h d −1) in a plant factory with artifi cial lighting (PFAL). As the DLI increased, the shoot length and leaf area were exponentially reduced after shoot development at both nine and 20 weeks of treatments. At nine weeks of treatment, the greater light intensity and longer photoperiod treatments, where the shoot established fastest, the photosynthetic products were translocated to the roots fi rst and the dry weight distribution in the root increased as DLI increased. In the high light intensity and long photoperiod treatments, SPAD value, maximum (F v/Fm), and minimum (F v/ Fo) quantum effi ciency tended to decrease, and the photosynthetic traits were negatively aff ected over time with leaf senes- cence. The root growth rate in high light intensity with long photoperiod treatments seemed to lag behind that in low light intensity with short photoperiod treatments. As a result, this study found that a light intensity of 50 μmol m −2 s−1 with a 12 h d −1 photoperiod (DLI of 2.16 mol m −2 d −1) was a suitable light environment for both shoot and root growth of ginseng seedlings. Further, the shoot establishment should be considered to design a light environment for ginseng seedling produc- tion in a PFAL.