• Journal of Korean Association for Spatial Structures
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• v.11 no.3
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• pp.77-83
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• 2011

Laminated composite plates have shown their superiority over metals in applications requiring high specific strength, high specific modulus, and so on. Therefore, they have used in various industry. However, they have poor resistance to impact compared to typical metal materials. To resolve this problem by many researchers for a variety of studies have been attempted. This study investigates characteristic of impact behavior of laminated composite plates due to initial stress. Using finite element program which involved the indentation law, we investigate characteristic of impact behavior of laminated composite plates due to initial stress.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1997.04a
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• pp.99-99
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• 1997

현재까지 NSAID 및 SAID의 사용으로 급성염증의 경우는 잘 조절되고 있으나, 류마티스 관절염과 같은 만성염증성 질환은 극복하지 못하였다. 뿐 만 아니라, 상기의 약물들의 장기간 사용으로 인한 부작용이 문제되고 있다. 그러므로, 만성염증성 질환의 치료를 위한 새로운 계열의 항염증제 개발이 시급하며, 많은 연구자들이 여러 가지 식물추출물을 이용하여 신약개발의 가능성을 타진하고 있다. 이의 일환으로, 본 연구에서는 고전문헌에서 사용된 식물들을 대상으로 하여 Rat의 류마티스 관절염 model을 이용하여 그들의 항염증작용을 연구하였다. 여정자 및 등줄나무를 포함한 27종의 식물을 이용하여 각 methanol 추출물을 조제하고, 매일 경구로 투여하였다 (200 mg/kg/day). 류마티스성 관절염은 rat의 족부에 Mycobacterium butyricum (0.6 mg/rat)을 주사하여 유발시켰고, 2차부종의 억제를 추출물의 활성으로 판정하였다. 그 결과, 27종의 식물중 목통, 마황 및 산두근이 2차부종을 유의성있게 억제하였으며, adjuvant 주사 후 16일에 억제율이 각각 22%, 36%, 13%로 나타났다. 산두근을 분획하여 재검정한 결과 50 mg/kg/day의 용량으로 투여시 EtOAc 및 n-butanol 분획에서 억제능이 나타나, 이들 분획을 대상으로 활성물질의 분리를 계속하고 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.05a
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• pp.227-229
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• 2023

양자컴퓨터는 큐비트(qubit)의 얽힘(entanglement)과 중첩(superposition) 성질을 통해 동시에 연산을 수행할 수 있어 고전컴퓨터에 비해 연산 속도가 획기적으로 빠르다. 전수조사 연산을 매우 빠르게 수행할 수 있는 양자 알고리즘인 Grover 알고리즘을 사용하면, n-bit 보안강도를 가지는 SHA2와 같은 해시함수를 n/2-bit 보안강도로 낮추게 되어 해시함수가 적용되는 분야의 보안을 위협하게 된다. 양자컴퓨터를 통한 해킹에는 많은 양자 자원이 요구되고, 안정적인 구동 환경이 갖춰져야 하기 때문에 실현되기 위해서는 아직까지 상당한 시간이 소요될 것으로 보인다. 이에 연구자들은 필요한 양자 자원을 최소화하는 효율적인 양자 공격 회로를 제시하며 연구를 수행하고 있다. 본 논문에서는 이러한 SHA2 해시함수에 대한 양자 회로 구현 동향에 대해 살펴본다.

• Industry Promotion Research
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• v.5 no.1
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• pp.73-87
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• 2020

The purpose of this paper was to find examples of a group of interpretations while biased toward the translation of the manuscripts of Myeongnology, and to apply the criteria of the translation of the manuscripts of Myeongnology in accordance with the criteria of SIN(信), DAL(達), and AH(雅) of EOM-BOK. Since the original author's intention should be faithfully reflected, the translation of the original book should be applied to the interpretation required at that time based on the translation corresponding to SIN(信), the translation corresponding to DAL(達) and the AH(雅) translation corresponding to the elegant interpretation. Translation is the most important purpose of implementing equivalence in the intentions of the original author, so the equivalence of the Source language and the Taget language should be observed even in the differences of expression. Up until now, the question of the translation of the nouns has mainly focused on the translation of the stylistic system by focusing on trying to overcome the structural differences of the language. Translation now requires the implementation of semantic equivalence as well as primarily a stylistic approach. This researcher wanted to open a new horizon for the study of classical literature in Myong-hak by presenting a standard for the translation of robes that achieve the intent and equivalence of the original author in the translation of the original text.

• Sijohaknonchong
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• v.22
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• pp.57-83
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• 2005

This article reviewed ‘Gojangsijoseonju(고장시조선주)' which was written by Gojeong-ok(.고정옥), a scholar of Korean literature. and showed the features and importance in the history of Korean literature. Gojeong-ok was not properly studied in the history of Korean literature for the time being because he went to North Korea during the Korean war. Even for the researcher on Korean literature.' the literary works of Gojeong-ok were not introduced properly. However, the systematic studies on Gojeong-ok and his literary works should be done, and should be well appreciate his work in the history of the research for Korean literature by his achievements. This article considered his literary achievement through his book, 'Gojangsijoseonju'. 'Jangsijo(장시조), that was named by Gojeong-ok for 'Saseolsijo(사설시조), stood in highly important position to explain the history of literarature in late period of Chosun(조선) Dynasty. He tried the analysis on the fifty (50) selected 'Saseolsijo' and made commentaries on them in his book. And he suggested the original and creative theory on 'Saseolsijo' at the time of the book published. This article considered his understandings on the poems of classical literature, revealed in his literary works, and especially, the features on the theory for the 'Jangsijo'. Through this process, it could be clearly understand his views on literary works in itself. By considering the analysis of literature that was introduced with the commentaries, it could be seen the aspects of the specific analysis on each literature. Through these works, it could be looked forward to getting more detailed investigating clue on the view of Gojeong-ok for the poems of classical literature.

• Journal of Korean Classical Literature and Education
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• no.37
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• pp.47-73
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• 2018

This thesis aims to find out the purpose of recording . I tried to understand the reason that the compiler of included this song in the record of King Yuri. The result of tracking the intention of the compiler in this thesis is as follows. I think that was chosen as a symbol of King Yuri's character, especially connected with his inner side. By introducing a hobby that contained the inner side of King Yuri, the compiler implied that his failures and mistakes in subsequent governments stem from human limitations that did not adequately refine his qualities. I think that the compiler who showed the character of King Yuri through only one short song also showed the highest level of enjoying poetry. The enjoyment of literature is a pleasure in understanding the life of someone through literature and bring it back into their lives. In this respect, by pursuing the intend of the compiler, we will be close to the value of the song, .

• (The)Study of the Eastern Classic
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• no.32
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• pp.29-50
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• 2008

This thesis is an introduction and critique of the recently released 'Wongyo-Jinjeok(원교진적)'. 'Wongyo-Jinjeok' is the critique of Seokjeong Jeong-Jik Lee (석정 이정직, 1841-1910), a practical scientist and writer during the last years of the Korean Empire, on the calligraphy of Wongyo(원교) Gwang-Sa Lee (이광사, 1705-1777). Even though whether or not Seokjeong follows the flow of Donggukjinche(동국진체) is to be determined by the specialists in this field, this thesis is based on the view that Seokjeong was influenced by Donggukjinche. The academic value of 'Wongyo-Jinjeok' is Seokjeong's preface and epilogue which critiques Wongyo's writing. 'Wongyo-Jinjeok'is a collection of calligraphic specimens from the 18 pieces of Chinese poetry Wongyo had written before and after June 1756 which was the year after he was banished to Booryung. Seokjeong critiqued the writing of Wongyo from the perspective of calligraphic history in the preface and epilogue of 'Wongyo-Jinjeok'. Seokjeong had been positive about Wongyo's taking after the pre-Wangheejee calligraphic style. But at the same time, Seokjeong thought that Wongyo's ability to create was limited by the public morals of that time. Such thought of Seokjeong can be interpreted as an evaluation of Wongyo's calligraphy as having been externally stern but failing to transcend the realm of mastery to the realm of creation.

• (The)Study of the Eastern Classic
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• no.67
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• pp.173-201
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• 2017

Sinheung Military Academy was the first one which prepared for independence war built by members of Sinminhoe in Western Manchuria. Sinheung Military Academy is known that nurtured 3,500 independence soldiers during 10 years from 1911 thorough 1920. Nevertheless no people know how it recruited so many students for 10 tears. In the course of studying the recruit of Sinheung Military Academy, I became to focus on Manjugisa by Yi Sang-nyog. Although Yi Sang-nyon remembered that there were over five hundred students in Sinheung Military Academy from just after it's set up in Manjugisa, scholars overlooked that mention so far. In addition, in the Sixth poem of Manjugisa, Yi Sang-nyong recollected that there were 30 preliminary educational organizations in 1918 after installation of Sinheung Military Academy in 1911. Therefore I concluded that the over 500 students nurtured from just after installation of Sinheung Military Academy were summed up students of preliminary educational organizations over Sinheung Military Academy's and proved it. The students of preliminary educational organizations in Liuhexian Tonghuaxian entranced into Sinheung Military Academy after graduation. The graduates of Sinheung Military Academy taught the students of preliminary educational organizations a common and military educations in duty for two years. In conclusion, Sinheung Military Academy and nearby preliminary educational organizations were an wide military camp organically maintained by Korean in Western Manchuria for big purpose of independence war.

• Journal of the Korean Institute of Intelligent Systems
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• v.14 no.3
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• pp.253-261
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• 2004

Game theory is mathematical analysis developed to study involved in making decisions. In 1928, Von Neumann proved that every two-person, zero-sum game with finitely many pure strategies for each player is deterministic. As well, in the early 50's, Nash presented another concept as the basis for a generalization of Von Neumann's theorem. Another central achievement of game theory is the introduction of evolutionary game theory, by which agents can play optimal strategies in the absence of rationality. Not the rationality but through the process of Darwinian selection, a population of agents can evolve to an Evolutionary Stable Strategy (ESS) introduced by Maynard Smith. Keeping pace with these game theoretical studies, the first computer simulation of co-evolution was tried out by Hillis in 1991. Moreover, Kauffman proposed NK model to analyze co-evolutionary dynamics between different species. He showed how co-evolutionary phenomenon reaches static states and that these states are Nash equilibrium or ESS introduced in game theory. Since the studies about co-evolutionary phenomenon were started, however many other researchers have developed co-evolutionary algorithms, in this paper we propose Game theory based Co-Evolutionary Algorithm (GCEA) and confirm that this algorithm can be a solution of evolutionary problems by searching the ESS.To evaluate newly designed GCEA approach, we solve several test Multi-objective Optimization Problems (MOPs). From the results of these evaluations, we confirm that evolutionary game can be embodied by co-evolutionary algorithm and analyze optimization performance of GCEA by comparing experimental results using GCEA with the results using other evolutionary optimization algorithms.

• Progress in Medical Physics
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• v.17 no.2
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• pp.96-104
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• 2006

Experiments from several groups Including ours have demonstrated that $Ca^{2+}$ can enhance the inactivation of N-type calcium channels. However, it is not clear if this effect can be ascribed to a 'classic' $Ca^{2+}$-dependent inactivation (CDI) mechanism. One method that has been used to demonstrate CDI of L-type calcium channels is to alter the intracellular and extracellular concentration of $Ca^{2+}$. In this paper we replaced the external divalent cation to monovalent ion ($MA^+$) to test CDI. In the previous paper, we could separate fast (${\tau}{\sim}150ms$) and slow (${\tau}{\sim}2,500ms$) components of inactivation in both $Ba^{2+}$ and $Ca^{2+}$ using 5-sec voltage step. Lowering the external divalent cation concentration to zero abolished fast inactivation with relatively little effect on slow inactivation. Slow inactivation ${\tau}$ correspond very well with provided the $MA^+$ data is shifted 10 mV hyperpolarized and slow inactivation ${\tau}$ decreases with depolarization voltage in both $MA^+\;and\;Ba^{2+}$, which consistent with a classical voltage dependent inactivation (VDI) mechanism. These results combined with those of our previous paper lead us to hypothesize that external divalent cations are required to produce fast N-channel inactivation and this divalent cation-dependent inactivation is a different mechanism from classic CDI or VDI.