[류호진 노무사의 질의응답❶ 주 52시간 기준 변경] 그럼 연장근로 수당도 바뀌었나요

류호진,김다린 더스쿠프 2024 더스쿠프 Vol.- No.589

PCA를 이용한 신호기반 고장진단 알고리즘

류호진,이형철 한국항공우주학회 2015 한국항공우주학회 학술발표회 논문집 Vol.2015 No.11

본 논문에서는 소형 항공기를 이용하여 항공기 엔진의 고장을 예측하고 진단하여 정비의 효율성을 높이기 위한 고장진단 알고리즘을 제안하였다. 항공기에서 수집된 진동신호를 FFT로 주파수 신호로 변환한 뒤 ANPSD를 이용하여 신호의 첨두점(peak)의 변화를 관찰하고 PCA를 이용하여 연산의 효율성을 높였다. 특히 ANPSD의 RPM에 대한 민감도를 줄이기 위해서 PCA를 사용하였다. 본 논문에서는 실험을 통하여 알고리즘을 검증하였다. In this paper, we predict a failure of an aircraft engine using a small aircraft, and the fault diagnosis algorithm is proposed for improving the efficiency of maintenance. The vibration signals collected by the aircraft are converted into the frequency signal using the FFT(Fast Fourier Transform). After that The Averaged Normalized Power Spectral Density(ANPSD) analyze change of peak of signal and The Principal Component Analysis(PCA) increase the efficiency of calculation. Especially PCA is used to reduce the sensitivity of RPM. In this paper, an algorithm is verified by experiments.

Brassinosteroids in Plant Developmental Signaling Networks

류호진,황일두 한국식물학회 2013 Journal of Plant Biology Vol.56 No.5

Brassinosteroids (BRs) are plant steroid hormoneswith essential roles in a broad range of biological anddevelopmental processes. The molecular components ofcanonical BR signaling pathways, including the plasmamembrane-anchored co-receptor complex (BRI1 and BAK1),cytoplasmic and nuclear signal transmitters (BSK1, CDG1,BSU1, 14-3-3 proteins, BIN2, and PP2A), and key transcriptionfactors (BZR1, BES1, and BEHs) have been well established,and recent studies have revealed the prominent roles ofcrosstalk between BR pathways and other signaling pathwaysin diverse plant developmental processes. We provide anoverview of recent progress in our understanding of thebiological roles of the interplay between BRs and othersignaling cues, with an emphasis on how BRs regulate plantdevelopmental programs by modulating diverse signalingpathways.

제 1 발표장 : 강화재 형상 및 정렬 방향이금속 복합재료의 응력 전달 효율에 미치는 영향

류호진,정경현,홍순형 한국복합재료학회 1998 한국복합재료학회 학술발표대회 논문집 Vol.- No.1

THE EFFECT OF SI-RICH LAYER COATING ON U-MO VS. AL INTERDIFFUSION

류호진,JAE SOON PARK,JONG MAN PARK,CHANG KYU KIM 한국원자력학회 2011 Nuclear Engineering and Technology Vol.43 No.2

Si-rich-layer-coated U-7 wt%Mo plates were prepared in order to evaluate the diffusion barrier performance of the Si-richlayer in U-Mo vs. Al interdiffusion. Pure Si powder was used for coating the U-Mo plates by annealing at 900 ºCfor 1 h undervacuum of approximately 1 Pa. Si-rich layers containing more than 60 at% of Si were formed on U-7 wt%Mo plates. Diffusioncouple tests were conducted in a muffle furnace at 560-600 ºCunder vacuum using Si-rich-layer-coated U-Mo plates andpure Al plates. Diffusion couple tests using uncoated U-Mo plates and Al-(0, 2 or 5 wt%)Si plates were also conducted forcomparison. Si-rich-layer coatings were more effective in suppressing the interaction during diffusion couple tests betweencoated U-Mo plate and Al, when compared with U-Mo vs. Al-Si diffusion couples, since only small amounts of Al in thecoating could be found after the diffusion couple tests. Si-rich-layer-coated U-7wt%Mo particles were also prepared usingthe same technique for U-7 wt%Mo plates to observe the microsturctures of the coated particles.

Biological control of Colletotrichum panacicola on Panax ginseng by Bacillus subtilis HK-CSM-1

류호진,Hoon Park,서동상,정건호,박경석,이병대 고려인삼학회 2014 Journal of Ginseng Research Vol.38 No.3

Background: Biological control of plant pathogens using benign or beneficial microorganisms as antagonisticagents is currently considered to be an important component of integrated pest management inagricultural crops. In this study, we evaluated the potential of Bacillus subtilis strain HK-CSM-1 as abiological control agent against Colletotrichum panacicola. Methods: The potential of B. subtilis HK-CSM-1 as a biological control agent for ginseng anthracnose wasassessed. C. panacicola was inoculated to ginseng plants and the incidence and severity of disease wasassessed to examine the efficacy of the bacterium as a biological control against C. panacicola. Results: Inoculation of Panax ginseng plants with B. subtilis significantly suppressed the number of diseaselesions of C. panacicola and was as effective as the chemical fungicide iminoctadine tris(albesilate). The antifungal activity of B. subtilis against C. panacicola was observed on a co-culture medium. Interestingly,treatment with B. subtilis did not significantly affect the diameter of the lesions, suggesting thatthe mechanism of protection was through the reduction in the incidence of infection related to the initialevents of the infection cycle, including penetration and infection via spore germination and appressoriumformation rather than by the inhibition of invasive growth after infection. Conclusion: Our results suggest that B. subtilis HK-CSM-1 can be used as an effective and ecologicallyfriendly biological control agent for anthracnose in P. ginseng.

PERFORMANCE EVALUATION OF U-Mo/Al DISPERSION FUEL BY CONSIDERING A FUEL-MATRIX INTERACTION

류호진,YEON SOO KIM,JONG MAN PARK,HEE TAEK CHAE,CHANG KYU KIM 한국원자력학회 2008 Nuclear Engineering and Technology Vol.40 No.5

Because the interaction layers that form between U-Mo particles and the Al matrix degrade the thermal properties of U-Mo/Al dispersion fuel, an investigation was undertaken of the undesirable feedback effect between an interaction layer growth and a centerline temperature increase for dispersion fuel. The radial temperature distribution due to interaction layer growth during irradiation was calculated iteratively in relation to changes in the volume fractions, the thermal conductivities of the constituents, and the oxide thickness with the burnup. The interaction layer growth, which is estimated on the basis of the temperature calculations, showed a reasonable agreement with the post-irradiation examination results of the U-Mo/Al dispersion fuel rods irradiated at the HANARO reactor. The U-Mo particle size was found to be a dominant factor that determined the fuel temperature during irradiation. Dispersion fuel with larger U-Mo particles revealed lower levels of both the interaction layer formation and the fuel temperature increase. The results confirm that the use of large U-Mo particles appears to be an effective way of mitigating the thermal degradation of U-Mo/Al dispersion fuel.

趙璥詩의 天機流露樣相과 그 意味

柳浩珍 동양고전학회 2012 東洋古典硏究 Vol.0 No.49

荷棲趙璥詩의 특징은 우선 신선, 꽃의 신, 귀신, 朱鳥, 龍등 신이한 존재가 등장하는 환상적 내용에서 찾을 수 있다. 이러한 내용은 하서가도 학의 정치이상과 사회 현실 사이에 존재하는 커다란 간극을 인식하고 그로 인한 悲哀를 표출한 것이라 생각된다. 물론 그가 당대 현실을 비관적으로 바라보기만 했던 것은 아니다. 그의 시에는 여느 도학자의 시처럼‘봄’이라는 상징이 출현하는데, 이는 절망 속에서도 세상에 대한 낙관적인믿음을 지니고 있었다는 점을 드러낸다. 그는 자연물을 형용함에 있어 그 배후에 놓인 우주의 理法과 함께 자연물 자체의 活處를 선명하고 예리하게 묘사하였다. 조선전기 도학자들이 궁극적으로 天理와 本性의 體認이라는 주제를 겨냥한 데 비하여 그는 사물의天機를 묘파하는 쪽으로 시세계를 더 확장했던 것이다. 특히 山水의 精神을묘사한 시들은 강인한 힘과 역동적인 운동을 형상화 함으로써 쇠잔해가는 세상에서 용맹스럽게 전진하려는 인생태도를 암시하였다. 자연물의 天機에주목한 하서는 새로운 매화의 형상을 그려냄으로써 더욱 풍부하게 자신의人生理想을 제시하였다. 이전의 매화시와는 달리 하서의 매화시에서는 매화의 모습이 도를 체득한 道人의 형상, 동시대인을 감화시키는 大人의 형상, 그리고 天機를 발현한 處士의 형상으로 나타난다. 어두운 사회 현실을 의식하면서 매화의 모습을 道人과 大人의 형상으로 그려냈다는 점도 특이하지만, 매화를 天機를 발현한 존재로서 묘사하였다는 점은 더욱 주목할 만한 것이다. 이는 天眞한 인격에 대한 지향과 그러한 인격의 상실에 대한 두려움을 동시에 드러내어 인간적인 자아 형상을 선명하게 그려냈다고 할 수 있다. 하서는 당대의 천기론적 사유를 도학시 창작에 수용하여 보다 인간적이고 현실적인 人格理想을 창조했던 것이다. 이는 18세기 도학시의 새로운 변화를 보여주었다는 점에서 의미 있는 성과라 할 수 있다. The poetry of Haseo Jo Gyeong is first characterized by its fantasy content with mysterious and strange beings such as mountain wizards, gods of flowers, ghosts, Jujos and dragons. Such works imply the huge gap between his political ideal of Neo-Confucianism and the reality of society and are expressions of his resulting sorrow. Of course, he did not just look at reality pessimistically. Like other Neo-Confucianism scholars, he used the symbol of "spring" in his poems, which indicates that he did have optimistic belief in the world in spite of despair. In his poems, the symbol of "spring" implies the political world where the noble man grabbed the power and the sinister groups were extracted or the world where the political ethics of Neo-Confucianism was implemented. His works depicting the essence of natural objects, mountains, and rivers exhibit the characteristics of his poetry more clearly. He described the law of the universe behind natural objects and the vibrant aspects of natural objects by depicting their movements in a clear and sharp manner. Unlike the old Neo-Confucianism scholars that often created poems on the topic of acquirement of natural law and nature, he expanded his poetic world in a direction of revealing the secrets of objects. His works describing the spirit of mountains and rivers are especially noteworthy in that they implied a life attitude of moving forward in an deteriorating world bravely by manifesting strong and dynamic power. Paying attention to the secrets of natural objects, Haseo displayed his life ideal in richer ways by painting the new forms of ume flowers. Unlike the old ume flowers poems in the past, his ume flowers poems present ume flowers as ascetics that obtained truth, men of virtue that inspired contemporary people, or retired gentlemen that revealed the profound secrets of nature. While it is unique that he manifested the forms of ume flowers in ascetics and men of virtue while perceiving the dark reality of society, it is more noteworthy that he described ume flowers as the beings revealing the profound secrets of nature. It was the expression of his yearning for an innocent personality and his fear for losing the personality, clearly depicting a human form of his ego. He created a more human and realistic personality ideal by embracing the contemporary thinking based on the profound secrets of nature in his Dohak poetry[道學詩], which is a significant achievement in that it showed new changes to Dohak poetry in the 18th century.

Development of High-Density U/Al Dispersion Plates for Mo-99 Production using Atomized Uranium Powder

류호진,김창규,심문수,박종만,이종현 한국원자력학회 2013 Nuclear Engineering and Technology Vol.45 No.7

Uranium metal particle dispersion plates have been proposed as targets for Molybdenum-99 (Mo-99) production toimprove the radioisotope production efficiency of conventional low enriched uranium targets. In this study, uranium powderwas produced by centrifugal atomization, and miniature target plates containing uranium particles in an aluminum matrix withuranium densities up to 9 g-U/cm3 were fabricated. Additional heat treatment was applied to convert the uranium particles intoUAlx compounds by a chemical reaction of the uranium particles and aluminum matrix. Thus, these target plates can betreated with the same alkaline dissolution process that is used for conventional UAlx dispersion targets, while increasing theuranium density in the target plates

Post-irradiation Analyses of U-Mo Dispersion Fuel Rods of KOMO Tests at HANARO

류호진,J. M. PARK,Y. J. Jeong,K. H. Lee,Y. S. Lee,C. K. Kim,Y. S. Kim 한국원자력학회 2013 Nuclear Engineering and Technology Vol.45 No.7

Since 2001, a series of five irradiation test campaigns for atomized U-Mo dispersion fuel rods, KOMO-1, -2, -3, -4, and -5,has been conducted at HANARO (Korea) in order to develop high performance low enriched uranium dispersion fuel forresearch reactors. The KOMO irradiation tests provided valuable information on the irradiation behavior of U-Mo fuel thatresults from the distinct fuel design and irradiation conditions of the rod fuel for HANARO. Full size U-Mo dispersion fuelrods of 4-5 g-U/cm3 were irradiated at a maximum linear power of approximately 105 kW/m up to 85% of the initial U-235depletion burnup without breakaway swelling or fuel cladding failure. Electron probe microanalyses of the irradiated samplesshowed localized distribution of the silicon that was added in the matrix during fuel fabrication and confirmed its beneficialeffect on interaction layer growth during irradiation. The modifications of U-Mo fuel particles by the addition of a ternaryalloying element (Ti or Zr), additional protective coatings (silicide or nitride), and the use of larger fuel particles resulted insignificantly reduced interaction layers between fuel particles and Al.