On the adaptive pre-processing technique for the linerization of weakly nonlinear volterra systems

최봉준,김용남,정지현,남상원,Choi, Bong-Joon,Kim, Yong-Nam,Chung, Ji-Hyun,Nam, Sang-Won 제어·로봇·시스템학회 1997 제어·로봇·시스템학회 논문지 Vol.3 No.5

본 논문에서는 볼테라 비선형 시스템의 선형화를 위한 새로운 적응 선행처리 기법을 제시한다. 특히, 제안된 적응 선행처리 기법은 (i) 순수 비선형 왜곡 보상을 위한 부분(pure nonlinear distortion compensator: PNDC)과, (ii) 선형 왜곡 보상을 위한 선형 역필터(linear inverse filter: LIF)의 두 부분으로 구성된다. 본 논문의 선형화 기법의 장점으로는 기존의 P차 역(Pth-order inverse) 기법에 비하여 계산량이 상당히 감소되며, 적응 알고리듬이 보다 빠르고 안정된 수렴 특성을 나타낸다. 끝으로, 모의실험을 통하여, 제안된 선행처리 기법의 성능및 실제 적용 가능성을 살펴본다.

광학부크기 6 mm 홍채고정 안내렌즈의 임상결과

최봉준,손민호,정희정,임대원,이송희.Bong Joon Choi. M.D.. Min Ho Son. M.D.. Hee Jung Jung. M.D.. Dae Won Lim. M.D.. Song Hee Lee. M.D. 대한안과학회 2006 대한안과학회지 Vol.47 No.2

Purpose: To evaluate the clinical results of 6-mm iris-fixated phakic intraocular lens (Artisan? lens) implantation in myopic patients. Methods: Forty eyes of 23 myopic patients underwent 6-mm Artisan? phakic IOL implantation and were followed-up for over 6 months. We prospectively analyzed the efficacy, stability, predictability, change of astigmatism, endothelial cell count, pupil diameter, degree of decentration, subjective satisfaction and complications. Results: The preoperative mean spherical equivalent was -9.46 D, and postoperative spherical equivalent was -0.70D at 1 month, -0.55D at 3 months, -0.54D at 6 months, -0.78D at 12 months and remained stable during the follow-up period. The preoperative mean astigmatism was -1.88D and postoperative astigmatism was -0.87D at 6 months. Postoperative uncorrected visual acuity (UCVA) was more than 0.8 in 85% of the eyes at 1 month, 91% at 3 months, 95% at 6 months, and 89% at 12 months. The spherical equivalent refraction after surgery was within 1.0D of emmetropia in 78% of eyes at 1 month, 80% at 3 months, 88% at 6 months, and 64% at 12 months. There was no significant decrease in the endothelial cell count during the follow-up period. Preoperative scotopic pupil diameters were significantly decreased at 1 month and the mean decentration of the lens was 0.38 mm. Patient satisfaction was generally high. Complications included the transient elevation of intraocular pressure in 1 eye, corneal edema in 4 eyes, iritis in 1 eye, traumatic dislocation in 1 eye and iris atrophy in 2 eyes. Conclusions: The 6-mm Artisan phakic IOL implantation may be an effective surgical procedure for myopic patients who cannot undergo corneal refractive surgery, as it provided good visual results, predictability, patient satisfaction, and short-term safety.

대학태권도선수의 실수인식과 의도적 연습 및 인지된 경기력의 관계

최봉준(Choi, Bong Jun),원세종(Won, Se-Jong) 세계태권도문화학회 2022 세계태권도문화학회지 Vol.13 No.2

The purpose of this study was to investigate the relationship of perception of error, deliberate practice, and perceived performance of University Taekwondo Athletes. To this end, 321 Taekwondo athletes (male 207, female 114) participated in this study. Collected data were analyzed by descriptive statistics, correlation, and multiple regression using SPSS 22.0 version. The results revealed as follow. First, learning from error, error risk taking, and thinking about error had a positive effect on deliberate practice. Second, learning from error and thinking about error had a positive effect on performance satisfaction while error risk taking and thinking about error had a positive effect on will to win. Third, deliberate practice had a positive effect on performance satisfaction and will to win. In conclusion, athletes’ perception of error is key component to enhance deliberate practice and perceived performance. Furthermore, deliberate practice was also identified as a variable that improves perceived performance.

이제현(李齊賢)의 성리학적 역사관과 전통문화인식

최봉준 ( Bong Jun Choi ) 한국사상사학회 2008 韓國思想史學 Vol.0 No.31

‘조선’ 국호로 본 여말선초의 역사인식과 이상국가론

최봉준(Choi Bong-jun) 한국역사연구회 2018 역사와 현실 Vol.- No.108

State titles tend to reflect the mindset of the state founders themselves, and their idea of an ‘ideal state’ as well, with that kind of idea (of how to bring such idealistic visions to reality) usually revealing their own cultural traits too. Examined in this study is how the people’s understanding of Neo-Confucianism -as well as how they viewed history- changed in the late Goryeo-early Joseon period, and how they viewed their own culture, with a focus upon the state title ‘Joseon.’ Until now, the foundation of Joseon was considered as an event that symbolized a transfer from Buddhism to Confucianism, or a result of deepened understanding of Neo-Confucianism as well as more seasoned Neo-Confucian reform ideas. Recently, foundation of the Joseon dynasty has been analyzed from a somewhat different perspective, and this study too could be categorized as one of such examples as it tried to understand the foundation of the Joseon state in terms of the founders’ perception of the world (or outside order), and how that view was reflected in the title ‘Joseon’ itself. Traditionally we always perceived Dan’gun and Gija as the origins of Korean culture. Dan’gun symbolizes the Korean people’s historical and cultural individuality, while Gija exemplified the Korean people’s joining of the Sino-centric East Asian universal culture. The new state which replaced Goryeo settled on the title ‘Joseon,’ claiming itself as the successor of Gija. In that regard, one may say the title Joseon meant that the Joseon people’s objective and ideal for the new dynasty was to bring the Neo-Confucian idea of “the King’s way” to reality. Meanwhile, the Chinese Ming dynasty, just like its predecessor -the Mongol Yuan imperial government-, allowed Joseon’s own efforts of civilizing itself, and at that point the people’s sense of commemorating the legacy of Dan’gun had been growing strong for quite some time as well. In other words, Joseon was part of a Sino-centric order yet an individual entity that civilized itself, and continued to pursue East Asian universal qualities while retaining cultural individuality as well. Apparently this sort of duality was the result of the Joseon people’s effort to maintain a grand vision (bringing state ideals to reality), by employing realistic methods that were available to them.

정확한 이슈를 찾기 위한 트위터 기반 정제기법 제안

최봉준 ( Bongjun Choi ),우호진 ( Ho Jin Woo ),이원석 ( Won Suk Lee ) 한국정보처리학회 2014 한국정보처리학회 학술대회논문집 Vol.21 No.1

스마트 디바이스 산업의 발전으로 소셜미디어 데이터의 양은 기하급수적으로 증가하고 있다. 이렇게 증가한 데이터와 함께 분석을 통해 발견할 수 있는 정보의 양도 다양해지면서 여러 산업분야에서 소셜미디어 데이터 분석을 위한 연구가 진행되고 있다. 소셜미디어는 종류가 다양하고 하루 평균 발생량이 너무 많기 때문에 분석시간이 오래 걸릴 뿐 아니라,불필요한 불용어 및 방해요소 때문에 적절한 정제작업이 필요하다. 본 논문에서는 소셜미디어의 한 종류인 트위터 분석을 위해 여러 가지 기법으로 데이터를 정제한다. 정제과정은 분석에 용이한 형태로 데이터를 변형시킨 후 의미없는 데이터와 분석에 방해가 되는 불용어를 제거한다. 이 정제를 통해 데이터 정보의 질을 높이고 분석 시간을 단축시켜 빠르고 신뢰성 높은 분석결과를 도출할 수 있다.

고대~고려시대 다원적 사상지형과 유학의 전개과정

최봉준 ( Choi¸ Bong-jun ) 한국사상사학회 2021 韓國思想史學 Vol.- No.67

이 글에서 필자는 고대국가 성립기에서 고려시대까지 유학 사상의 전개를 중국 중심의 문화적 보편성과 고유의 전통을 의미하는 문화적 개별성, 그리고 다원적 사상지형을 통해 고찰하였다. 지금까지의 연구는 남아 있는 단편적인 사료를 통해 유학사상의 전개를 국가체제의 발전, 그리고 몇몇 인물들의 사상을 중심으로 진행되어 왔다. 그러나, 유학 교육기관이 설립되고 율령이 반포되는 시점에 불교가 수용되었으며, 기존에 토착신앙이 온존하고 있다는 점은 유학이 이미 다원적 사상지형 안에 존재하고 있었다는 것을 의미한다. 그리고 유학은 이들 불교와 토착신앙, 이후에 수용되는 도교와 공존과 조화를 이루며 사회적 기능과 역할을 부여받았다. 또한 유학의 수용은 중국 중심의 문화적 보편성을 수용하는 것으로서 국가체제는 물론 중국과의 관계에서도 조공책봉관계를 중심으로 하는 보편체계와 연관지어 생각해볼 수밖에 없다고 할 수 있다. 이러한 고대~고려시대 유학의 성격은 적어도 성리학의 내면화가 상당히 진행되는 여말선초까지는 유지되었다고 할 수 있다. 성리학 수용 이후 군신관계를 중심으로 하는 정치의식이 새롭게 재편되는 과정 속에서도 역사계승의식은 단군과 기자를 중심으로 문화적 개별성과 보편성사이의 균형을 유지하고자 하였다. 이는 일원성이 강조되는 성리학이 수용되는 과정 속에서도 찾아볼 수 있는 우리나라 유학사상의 특징이라고 할 수 있다. The author studied the development of Confucian ideas from the established period of ancient countries to the Goryeo Dynasty through sinocentric cultural universality, cultural individuality that means its own tradition, and topography of pluralistic thought in this thesis. The past studies have been arranged to investigate the development of Confucian ideas focusing on the development of national systems and several people's ideas through the remaining fragmentary historical records until now. However, Buddhism was accepted when educational institutions of Confucianism were established and laws were promulgated and the existing indigenous faiths were kept. These points mean that Confucianism already existed in structure of pluralistic thought. And Confucianism co-existed and harmonized with Buddhism, indigenous faiths, and Taoism that was accepted later and was given the social functions and roles. And the acceptance of Confucianism means to accept sinocentric cultural universality and associates with the universal system that focuses on the tributary and investiture relationships in the national systems and the relationships with China. These characteristics of Confucianism from ancient times to the Goryeo Dynasty were at least kept until the late Goryeo Dynasty and the early Joseon Dynasty that Neo-Confucianism was very internalized. Awareness of inheriting history tried to keep a balance between cultual individuality and universality focusing on Dangun(檀君) and Kija(箕子) even in the process that political awareness that focuses on the relationship between the ruler and the ruled after accepting Neo- Confucianism. This is the characteristics of Korean Confucian ideas that can be found in the process to accept Neo-Confucianism which emphasizes monism.

고려 의종대 다원적 사상지형과 『編年通錄』·『詳定古今禮』 편찬

최봉준(Choi, Bong-Jun) 한국사학사학회 2021 韓國史學史學報 Vol.- No.44

이 논문은 고려 의종대의 사상지형과 사상정책을 예종과 인종대의 연장선에서 파악하고, 이를 통해 『편년통록』과 『상정고금례』 편찬의 의미를 살펴봄으로써 많은 주목을 받지 못했던 의종대의 사상사를 재평가하는 것을 목적으로 한다. 고려국가는 유불도와 풍수도참, 민간신앙 등 다양한 사상이 공존과 조화를 이루고 있었다. 국왕은 이질적인 사상과 종교의 이해관계를 조정함으로써 국가적 통합을 이루고 있었다. 12세기 전반기 예종과 인종대에는 위축된 왕권을 회복하기 위해 유학을 중심으로 하는 문벌귀족을 견제해야만 하였다. 예종과 인종은 선종과 도교, 민간신앙 등 정치세력과 유대관계를 맺지 못한 사상을 집중적으로 육성하였으며, 국왕의 측근세력으로 주목을 받은 신진관료들은 이를 배경으로 정치의 전면에 등장하였다. 그러나, 묘청의 난으로 신진세력이 정치적으로 실패하면서 도교와 민간신앙 등 왕권에 의한 집중적 육성정책은 위기를 맞이하게 되었다. 이때 즉위한 의종은 내시와 환관, 신진 무신을 중심으로 측근세력을 형성하고 『편년통록』과 『상정고금례』를 수용하고 편찬하였다. 『편년통록』은 태조 왕건의 6대조 이야기를 설화적 성격의 신이사관으로 엮은 책이다. 『편년통록』은 왕실의 권위를 내세우고 고려의 후삼국통일의 의미를 부각시키기 위해 신라의 삼국통일에 크게 공헌한 김유신, 문희, 김춘추에 얽힌 설화의 내용을 채용하였다. 『상정고금례』는 당시까지 거행된 유교의례를 종합한 의례서라 할 수 있다. 비록 불교와 민간신앙의 요소가 포함되어 있기는 하지만, 전반적으로 유교정치이념에 따라 구성된 왕실의례와 국가의례를 수록하였다. 이와 같이 전혀 다른 성격의 서적을 국가가 수용하고 간행하는 것은 의종이 예종과 인종의 사상정책의 기본적인 구도를 이해하고 계승하고 있었던 것으로 볼 수 있다. 이는 국왕이 사상간의 관계를 조절하고 조정하는 역할을 여전히 유지하고 있었던 것으로 이해할 수 있으며, 고려시대의 다원적 사상지형은 국왕의 주도적인 역할로 유지되고 있었다는 것으로 볼 수 있는 중요한 증거라 할 수 있다. This paper is designed to find out the ideological structure and ideological policy during the period of King Uijong(毅宗), Goryeo Dynasty in relation with the period of King Yejong and Injong and then check out the meaning of the books “Pyeongnyeontongrok(『編年通錄』)” and “Sangjeonggogeumrye(『詳定古今禮』)”, thereby reappraising the ideological history during the period of King Uijong which has got less spotlight thus far. Goryeo had a lot of ideologies such as Confucianism, Buddhism, Taoism, Fengshui and folk-beliefs harmonizing together. The kings had to make the national integration by adjusting many different ideologies and religions. During the period of King Yejong and King Injong in early 12th century, King Yejong and King Injong had to keep in check the aristocratic families which valued the Confucianism in order to restore the weakened king’s power. So, King Yejong and Injong made efforts to develop the ideologies such as Zen Buddhism, Taoism and folk-beliefs, which were not related to any political groups and they helped the newly established administrative bureaucrats to come forward on the background of such kings’ support. But Myocheong’s Riot caused the newly established bureaucrats to politically collapse and the king’s main policy of developing Taoism and folk-beliefs faced the crisis. King Uijong, who was enthroned at this time, formed his own power base focusing on his eunuch and newly established bureaucrats and then accepted and compiled the books “Pyeongnyeontongrok” and “Sangjeonggogeumrye”. “Pyeongnyeontongrok” is a book which was compiled on the story of 6th generational ancestor of King Taejo(太祖) in a narrative style from the perspective of ‘Sinisagwan(神異史觀)’. It adopted the narratives on Kim Yu Shin(金庾信), Mun Hee(文姬) and Kim Chun Choo(金春秋) who greatly contributed to Shilla’s reunification of Three Kingdoms in order to establish the authority of royal family and enhance the meaning of Goryeo’s reunification of Later Three Kingdoms. “Sangjeonggogeumrye” is a rite book that summarized the Confucian rites performed up to that time. Though it also contained the Buddhism and folk-beliefs, it recorded the royal rites and national rites which were organized according to the Confucianism’s political ideology. As such, the nation’s acceptance and publishing of the books having ideologies different from Goryeo’s own ideologies show that King Uijong had understood the basic ideological policy of King Yejong(睿宗) and King Injong(仁宗) and succeeded them. This shows us that the kings still controlled and adjusted the relation between different ideologies and indicates that the pluralistic ideological structure during the period of Goryeo dynasty was kept by the king’s leadership.

웹 브라우저의 Favicon을 이용한 즐겨찾기 등록 탐지 시스템

최봉준(Bong-jun Choi),김일(iL Kim),김완규(Wan-kyoo Kim),박규석(Kyoo-seok Park) 한국정보과학회 영남지부 2001 한국정보과학회 영남지부 학술발표논문집 Vol.9 No.1

인도네시아 LINE 프로젝트 부지조성공사 시공사례

최봉준(Bongjoon Choi),함홍규(Honghyu Ham) 대한토목학회 2023 대한토목학회지 Vol.71 No.1