3차원 모세관 다이오드를 이용한 유체 이송

이민기,이상엽,이진기 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.5

도시숲의 산림 층위에 따른 지상부 바이오매스 및 제어인자

이민기,이해인,이창배 한국데이터정보과학회 2022 한국데이터정보과학회지 Vol.33 No.4

본 연구는 서울특별시 관악구와 금천구에 걸쳐 있는 관악산을 비롯한 도시자연공원의 산림 층위별 지상부 바이오매스 (이하; ‘바이오매스’)에 대한 생물적비생물적 인자들의 효과와 제어 메커니즘을 설명하기 위해 수행되었다. 생물적 인자로는 생물다양성 인자인 종다양성, 계통학적 다양성, 기능적 다양성, 수목 형질의 군집가중치 평균값을 선택했으며, 비생물적 인자로는 환경인자인 기후와 지형인자를 사용했다. 산림 층위별 가장 중요한 바이오매스 제어인자를 추출하기 위해, 다모형 추론법 (multi-model inference test)의 모델 평균화 접근법 (model-averaging approach)을 수행했다. 그 결과, 상층에서는 종풍부도와 계통학적 군집지수, 기능적 발산지수가 유의하게 영향을 미쳤고, 하층에서는 종풍부도와 최대 수고의 군집가중치 값이 유의한 제어인자로 선택되었다. 또한, 상층에서는 지형인자가 상층의 바이오매스를 제어했으나, 하층에서는 비생물적 인자의 유의한 효과를 발견하지 못했다. 상층의 바이오매스는 계통학적﹒ 기능적으로 유사하지만, 분류학적으로 다양한 종들에 의한 효과, 즉 상보적 니체 효과에 의해 증가했으며, 하층에서는 상층 분류군들의 치수 형성에 따른 연속적인 효과와 특정 분류군의 우점 기능형질로 인해 바이오매스가 제어되는 메커니즘을 나타냈다. 본 연구는 천연림에 비해 도시숲이 가지는 단순한 종 조성과 구조로 인하여 산림 층위별 바이오매스를 제어하는 고유한 메커니즘을 구명한다.

친구들과 더 잘 지내고 싶은데, 감정 조절이 잘 안 돼 어려워요.

이민기 한국초등상담교육학회 2023 한국초등상담교육학회 학술대회 Vol.2023 No.01

새로운 아크릴아미드계 중합체의 합성 및 졸-겔 상전이 특성 분석

이민기,김형완,한양규 한국고분자학회 2004 한국고분자학회 학술대회 연구논문 초록집 Vol.2004 No.04

구속연산자에 의한 보정 시스템의 관측성에 관한 연구

이민기,김태성,박근우 대한기계학회 2003 大韓機械學會論文集A Vol.27 No.4

고려시대 象輅의 운용과 의미

이민기 한국중세사학회 2018 한국중세사연구 Vol.0 No.54

Sangro(象輅)s of the Goryeo Dynasty are carriages ridden by Kings. The Goryeo Dynasty used Sangros by receiving them from the Liao(遼) Dynasty or the Jin(金) Dynasty. Originally, Sangros are one of five carriages(五輅) for protocol used by Chinese emperors. The Chinese emperors used their carriages by dividing them into places that ceremonies are arranged. The kings of the Goyroe Dynasty used them for national rituals. The use of Sangros in the Goryeo Dynasty is different from that of the Chinese Dynasties. The characteristics of Sangros used in the Goryeo Dynasty are as follows: When the kings of the Goryeo Dynasty visited, Beopgawijang transferred carriages to Judges. Apart from Nobu(鹵簿: the name of Royal procession in Goryeo Dynasty) system, Wijang which escorted carriages of the kings was set and separated. In BeobgaUiwi(法駕儀衛), the places that rulers existed were divided by expressing the separate zones that Sangros were located through Eun(Gan)jakjahongnaho(銀斫子紅羅號). The kings’ virtue and decision were expressed by using Sujeongjang(水晶杖)and Wolbu(鉞斧). And monarches who found auspicious things and wise persons that brought military victories were expressed by unique arrangement of fans and Hwagaes(華蓋) for designs. Sangros have implications that historicity and placeness of current royal power are just and the kings find talented persons and monopolize military power as given fortune and value of benevolent in their political activities. As the kings of the Goryeo Dynasty used designs with Confucian contexts, powerful directing points are shown. However, arrangement of centric designs shows different aspects from that of the Kitan(契丹[遼]) or the Song Dynasty. Even though the kings of the Goryeo Dynasty used a type of carriages in Songnos unlike the Chinese emperors’ use of them, different contexts from Chinese designs were expressed by placing designs surrounded by them. They show that the kings of the Goryeo Dynasty got recognition from the Chinese Dynasties and at the same time, they sought the independent royal authority by placing designs on Sangros to be different from those of the Song Dynasty. The type of designs is similar to those of the Song Dynasty as the kings showed off sacred or omnipotent royal authority to officials of distinguished families with Confucian knowledge. And design arrangement or protocol methods differed from country to country because attitudes toward power considered each country’s internal and diplomatic situations. The two points can be found through the examples which used Sangros as follows: First, it’s the perception gap according to contexts of Sangros from the Kitan and the Jin Dynasty. The Kitan gave them to the officials as the installation and imperial gifts of the imperial families or the contexts secondary to them according to ‘Order of the System of Conferring Ranks of Nobility(爵制)’. However, the Goryeo Dynasty gave the installation and Sangros to the officials in the context of posts which arranged the Goryeo Dynasty according to ‘Order of the position system(職制)’. The kings of the Goryeo Dynasty regarded Sangros from the context of order of titles of nobility as more important. Second, the kings of the Goryeo Dynasty showed the attitudes to try to succeed to vice-kings’ legitimacy, not their previous kings. As Sangros were used in national rituals, the issue of using them was changed to that of expressing the kings’ power. This was a special case, but when the installation was not done, innate power was expressed by using Sangros received by the previous kings which are one generation higher, not Sangros received by the previous kings of the same generation. In addition, they selected the kings’ power based on ‘the system according to titles of nobility’. The kings decided this through meetings with the liege. The Goryeo Dynasty internally secured legitimacy of the kings’ power with th...

고려시대 法駕鹵簿의 구성과 운용

이민기 한국중세사학회 2017 한국중세사연구 Vol.0 No.48

This study investigated the type and ceremony object of Nobu(鹵簿, the name of the royal procession) in Goryeo dynasty from the point of view that among the ceremonial equipages which were used in Nobu, a flag and its formation structurally described the royal dignity. Nobu is the procession that describes the royal dignity using the ceremonial equipages. Goryeo autonomously organized and managed Nobu whenever occasion required. Beobga Nobu(法駕鹵簿) as the largest Nobu was used when processing to auspicious rituals such as Wongu, Taemyo and etc.. This study classified the ceremonial equipages used for Nobu into flags, musical instrument and weapons and analyzed them. Flags are categorized middle, left and right flags according to the position and classified large, medium and small flags according to the size and the number of entourage. Beobga Nobu were 20 kinds of large flags, 12 kinds of medium flags and 2 kinds of small flags used. The ceremonial equipages were the symbols with the meanings. Therefore, they described the existence of an emperor by making a symbolic group, which meant ‘the place where an emperor presents’, combining the symbols. There were two noticeable reasons why the symbolic group was made. It was used for separating the space by describing the royal palace with flags or by appearing the adornment suitable for the royal court in case that the king processed out of the palace or performed national rituals in the court. Through those separations, the ceremonial equipages escorted the king’s body, and Nobu represented the power of the king. Beobga Nobu, the size and the status were not different from those of Tang or Song. However, the formation and the management had Goryeo’s own originality, which was based on the unique national identity that Goryeo’s thought of inwardly an emperor and outwardly a king was reflected on. The expression of the majesty of the king differed according to each characteristic of rituals. Confucian rituals were performed in the formation of the flags used the images with Confucian meanings, which was different from Goryeo’s unique national rituals. It might be to show the people that Goryeo’s King had an equal status with Chinese emperor through Nobu. Therefore, Song’s Yongjigidae formation of the flags shown in the formation of the Nobu in Confucian rituals embodied the ideology that Goryeo’s king was a Confucian monarch based on the thought of Providence.

ASYMPTOTIC STABILITY OF NON-AUTONOMOUS UPPER TRIANGULAR SYSTEMS AND A GENERALIZATION OF LEVINSON'S THEOREM

이민기 충청수학회 2020 충청수학회지 Vol.33 No.2

This article studies asymptotic stability of non-auto nomous linear systems with time-dependent coefficient matrices $\{A(t)\}_{t\in \mathbb{R}}$. The classical theorem of Levinson has been widely used to science and engineering non-autonomous systems, but systems with defective eigenvalues could not be covered because such a family does not allow continuous diagonalization. We study systems where the family allows to have upper triangulation and to have defective eigenvalues. In addition to the wider applicability, working with upper triangular matrices in place of Jordan form matrices offers more flexibility. We interpret our and earlier works including Levinson's theorem from the perspective of invariant manifold theory.

Synthesis of Heteroatom-Doped Hollow Mesoporous Carbon Nanospheres For Lithium-Sulfur Battery and Supercapacitor Applications

이민기,권용구 한국고분자학회 2019 한국고분자학회 학술대회 연구논문 초록집 Vol.44 No.2

감마선 계수를 이용한 Ba 동위원소 분리 실험

이민기,이종만,허동혜,권은희 대한방사선방어학회 2018 대한방사선방어학회 학술발표회 논문요약집 Vol.2018 No.11