• 제어로봇시스템학회:학술대회논문집
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• 2001.10a
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• pp.75.4-75
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• 2001

This paper designs the robust hybrid controller for the multi degree-of-freedom system having uncertainty caused by modeling error and disturbances. The controlled plant is the construction which has an active dynamic vibration absorber on the top and is excited by the El Centre earthquake at the base. The active controller designed by the LQR(Linear Quadratic Regulator) and H-infinity control theory. The robustness of the hybrid H$\infty$ controller is compared with that of the hybrid LQ controller from computer simulation.

• Proceedings of the Korea Contents Association Conference
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• 2017.05a
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• pp.131-132
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• 2017

영화는 인간이 할 수 있는 상상력을 가능하게 해주며 그것을 간접경험 및 학습 가능한 도구로서, SF영화 등에 사용된 과학기술을 시청각으로 접할 수 있다. 영화의 내용에서 제시된 로봇사회의 긍정적 모습과 부정적 보습을 시청함으로서 인간이 지켜야할 감성과 윤리적 도덕적 교육까지 가능하게 하며 나아가 다가올 미래 사회에서 새롭게 생겨날 직업까지도 생각할 수 있도록 한다.

• Proceedings of the Korean Biophysical Society Conference
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• 1996.07a
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• pp.41-41
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• 1996

Chilling-sensitive plants are damaged severly by chilling in the light. The activity of photosystem I(PSI) is known to be inhibited by low light-chilling and its iron-sulfur centers are presumed to be its primary target. In this report, the effect of chilling at 4$^{\circ}C$ in the light was investigated in the level of pigment-protein complexes in cucumber leaves compared with pea leaves. (omitted)

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.11a
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• pp.917-918
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• 2010

• The Bulletin of The Korean Astronomical Society
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• v.41 no.1
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• pp.33.2-33.2
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• 2016

Since the serendipitous discovery of a large-scale atomic hydrogen ($H_I$) ring discovered in the Leo I galaxy group, its origin has been under debate till today, whether it is the leftover after group formation or stripped gas structure during the galaxy-galaxy interaction. Intriguingly a number of $H_I$ clumps have been identified along the gas ring, some of which turn out to be associated with optically catalogued dwarf galaxies. The formation history based on detailed optical and $H_I$ gas properties of those dwarf galaxies will enable us to verify the origin of the Leo ring. In this work, we first probe the redshift and multi-color properties of those dwarf galaxies, using deep photometric and spectroscopic data from CFHT, Gemini and Magellan telescope.

• Journal of Internet Computing and Services
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• v.22 no.3
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• pp.37-43
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• 2021

In this paper, we study how objects from front and back cameras can be recognized in real time in a mobile environment to segment regions of object pixels and synthesize them through image processing. To this work, we applied DeepLabV3 machine learning model to dual cameras provided by Apple's iOS. We also propose methods using Core Image and Core Graphics libraries from Apple for image synthesis and postprocessing. Furthermore, we improved CPU usage than previous works and compared the throughput rates and results of Depth and DeepLabV3. Finally, We also developed a camera application using these two methods.

• Journal of Korean Society on Water Environment
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• v.24 no.3
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• pp.333-339
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• 2008

This study was carried out to assay the relationships between empirical factors and water quality in 23 agricultural reservoirs. Based on the trophic state index (TSI) deviation analysis, phosphorus in type II and III was the primary limiting factor on algal growth. BOD, COD, TP and chl.a concentration in type III reservoirs showed higher concentration than those of other types, while SS and TN concentration was no noticeable difference among three types. Characteristics of type III reservoirs showed large reservoir surface and drainage area, large surface area to volume (SAV) ratio, small drainage area to reservoir area (DA/RA) ratio, relatively old age, large paddy field and upland field to drainage area ratio (Mean 17.4%) and high generation and discharge loads compared to other types of reservoirs. In type I and II reservoirs, trends of BOD, TN, TP concentration in water column, were similar to those of the discharge load of pollutants. Although type II reservoirs generally showed low phosphorus discharge loads compared to type I reservoirs, TP and chl.a concentration in water column was greater than that of type I. Characteristics of type II reservoirs showed relatively large SAV ratio and old age compared to type I reservoirs and was similar to those of type III including eutrophic reservoirs.

• Journal of Plant Biology
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• v.38 no.2
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• pp.211-215
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• 1995

병풀(Centella asiatica)의 엽병 조직절편에서 유도된 배발생 캘러스로부터 체세포배 발생에 의하여 소식물체의 재분화를 이루었다. 엽병 조직절편을 1mg/L 2,4-D와 1mg/L kinetin이 조합 처리된 MS 기본배지에 치상하여 85%의 효율로 배발생 캘러스를 유도할 수 있었으며 이와 같은 배발생 캘러스를 5mg/L NAA와 1mg/L kinetin이 첨가된 배지로 옮겼을 때 체세포배의 형성은 87%까지 이루어졌다. 체세포배는 기본배지의 농도를 절반으로 줄이고 0.2 mg/L NAA와 0.2 mg/L kinetin이 첨가된 배지조건에서 기관분화를 거쳐 소식물체로 재분화되었다.

• Journal of Photoscience
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• v.3 no.3
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• pp.137-140
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• 1996

The inhibition of chlorophyll formation in cucumber cotyledons by N-phenyl oxadiazolidinedione derivatives Ia-u showed similar trend as their herbicidal activities. In case of oxadiazolidinedione Iq, with a propargyloxy substituent, both the highest herbicidal activity and inhibitory action(pI$_{50}$ = 6.37) were observed. The accumulation of protoporphyrin IX and cellular electrolyte leakage by oxadiazolidinedione Ia, Ik and Iq were well correlated with their inhibition of chlorophyll biosynthesis. These results suggest that the herbicidal activity of oxadiazolidine Ia-u is originated from the inhibition of chlorophyll biosynthesis.

• Korean Journal of Food Science and Technology
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• v.26 no.6
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• pp.704-708
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• 1994

This study was performed to compare quality of citron juice as affected by the extraction method. The yield of citron juice was 24.49% by method I (rotary-crushing and screening), 18.09% by method II (pressing) and 12.60% by method III (belt-pressing), respectively. Juices by methods I and II had more soluble solid contents and essential oil and pulp volume than that by method III. Method III was higher in titratable acidity than methods I and II. The contents of fructose, glucose and sucrose in method III were 0.54%, 0.37% and 1.11%, respectively, which were lower values than those in other methods. But there was no siginificant difference in the contents of total sugar by the extraction method. For fatty acids composition, the contents of oleic acid in method I, palmitic acid, linoleic acid and linolenic acid in method II, and stearic acid in method III, respectively, were highest when compared with other methods. The contents of free amino acids detected in method III were smaller than those in methods I and II. Threonin was detected only in method I, methionine and cystine were not detected in methods I. II and III. But the contents of the total amino acids in method III were $1.3{\sim}1.6$ times as large as those in methods I and II.