슬래밍 충격 압력 계산을 위한 선수선저의 형상계수 추정에 관한 연구

정석권,홍봉기 한국어업기술학회 1986 수산해양기술연구 Vol.22 No.2

On the slamming analysis of ship design the data for the impact pressure acted on the forward bottom of a ship are needed. Furthermore impact pressure is given by the function of both the hull form coefficient and relative velocity. In this papper. a simplified method to estimate hull form coefficient by perso;,al computer (p. c.) is studied. This numerical analysis was applied to the model of the Mariner type. and then the result by the p. c. was compared with that by IBM 7090 computer. Main results obtained are as follows: 1. The result by the developed p. c. method had fairly good agreement with that by conventional large computer (IBM 7090) within 2% error. 2. This developed method' by p. c. may be applied to the initial estimation of the K-value because of the close agreement between the ship lines by the results of p. c. and that of input.

상태공간 모델링에 의한 오일쿨러의 Robust LQG 제어기 설계

정석권,권태은 대한설비공학회 2019 설비공학 논문집 Vol.31 No.3

본 연구에서는 냉동사이클로 구성된 오일쿨러의 실용적인 저차원 상태공간 모델을 제시하고, 이에 기반한Robust LQG 서보 제어기를 설계하여 시뮬레이션 및 실험을 통해 그 타당성을 검증하였다. 본 연구의 주요결과들을 요약하면 다음과 같다. (1) 냉동사이클을 구성하는 장치의 사양으로부터 해석적인 모델을 구축하고, 제어량에 미치는 영향이 미미한상태변수들을 소거하여 저차원(4×4)의 실용적인 상태방정식 모델을 유도하였다. 유도된 상태공간 모델의타당성은 시뮬레이션과 실험을 통해 입증되었다. (2) 설계한 LQG 제어기에 의한 제어 정도는 주된 제어량인 오일출구온도의 경우 기동 시에는 ±0.1℃, 열부하변동 시에는 ±0.05℃의 오차 범위로 정밀하게 제어됨을 보였다. 한편 과열도의 경우는 기동 시에 ±1℃, 열부하 변동 시에 ±0.5℃의 정상상태오차를 갖는 것으로 나타나 우수한 추종성을 보였다. (3) LQG 제어기는 하중행렬의 변화에 따라 원하는 제어 정도와 제어 입력 간의 상충 문제를 조절하여 설계자가원하는 제어 성능의 최적화를 달성할 수 있음을 확인하였다. (4) LQG 제어기의 칼만필터는 프로세스 및 측정 잡음 하에서도 센서로 측정하기 어려운 상태변수 값들을엄밀히 추정할 수 있음을 확인하였다. This paper presents a robust LQG controller design method by a state space model to improve control performance of a refrigeration cycle under process and measurement noise. First, a state-space model of an oil cooler is derived as a 4th order system equation using several governed equations based on a moving boundary model. Next, the LQG controller which uses the Kalman filter is designed using linear quadratic regulator (LQR) gain and the Kalman gain to minimize an evaluation function and the individual influence of noise. We can independently determine the two gains of LQR and Kalman by the Riccati equation using the separation theorem. If the weighted matrices of the evaluation function are designed to satisfy the desired control performance and energy condition input, the designer conclusively determines LQR gain. Finally, the validity of the proposed design method is validated by computer simulations and real experiments in several cases. The results of some of the simulation and experiments showed that the proposed method can be implemented as a robust control.

Self-Fashioning in John Keats’s Early Sonnets

정석권 대한영어영문학회 2017 영어영문학연구 Vol.43 No.4

Cheong, Seok Kweon. “Self-Fashioning in John Keats’s Early Sonnets.” Studies in English Language & Literature 43.4 (2017): 1-15. The purpose of this study is to explore how Keats’s concern with the poetic career is figured in his early sonnet writing, and how he fashioned his poetic self by writing sonnets, and also how the specific use of the sonnet form allegorizes the poet’s self-consciousness about his poetic career. The thesis of this study is that Keats, an apothecary with neither born nobility, nor acquired formal classical education, used the sonnet form as a vocational enclosure in which he could make a name for himself. In this study, the beginning stage of Keats’s poetic career is examined by focussing on his early sonnets, and his interaction with the contemporary older poets, especially with Wordsworth, Coleridge, and Hunt. Influences, both conscious and unconscious, provides the early Keats models to copy, to transform, and/or to transcend. (Chonbuk National University)

Problem of Self-Consciousness: A Study on John Keats’s Scotland Sonnets

정석권 대한영어영문학회 2018 영어영문학연구 Vol.44 No.4

The aim of this study is to examine and analyze Keats’s Scotland sonnets written during his Scotland walking tour which represents the turning point in his poetic career. For Keats, the tour had very complex motivation, background, and results. Especially the sonnets regarding Burns memorials in Scotland allegorize the crisis of his poetic identity. Keats’s crisis of self-consciousness was intensified by his confronting the residence of William Wordsworth and the actual circumstances of Robert Burns. Keats’s realization at Burns’s memorials of entangled web of human miseries and aesthetic perceptions did not resolve the problem. Rather, it put him more deeply into the problem of self-consciousness.

John Keats’s Sonnets on the Aesthetic Experience: Consumption and Consummation

정석권 대한영어영문학회 2019 영어영문학연구 Vol.45 No.4

This study aims to explore how Keats’s sonnets on the aesthetic experience figuratively represent his concern with the poetic career, that is how his consumption of aesthetic objects figures in his sonnets as his consummation of being a poet. Keats’s sonnets of aesthetic experience are in many ways allegorical, and they in subtle ways reflect on his poetic career. In a subversive way, Keats’s sonnets on aesthetic experience hybridize the poetic genres, and allegorize consumptive reading. They self-reflexively represent Keats’s capable negativity which confers art a fictional vantage point from which it criticizes the actual world. And they also self-critically reflect the translative consumption that his sonnets on aesthetic experiences consummate in a finer tone.

호주 오지의 목소리(들)―“밴조” 패터슨과 헨리 로슨

정석권 현대문학이론학회 2002 現代文學理論硏究 Vol.0 No.18

한용운과 타고르의 비교 연구 – 님의 침묵과 기쁨 –

정석권 전북대학교 인문학연구소 2019 건지인문학 Vol.0 No.24

This research is aimed at considering what influence Han Yong-Woon got from Tagore in aesthetical/ideological aspects and what similarity/dissimilarity exists between Manhae’s and Tagore’s ‘Beloved’ or ‘Lord.’ Through comparative research on Tagore’s and Han Yong-Woon’s poems similarity and dissimilarity between them are traced. Han Yong-Woon influenced by and accepted poetic style and thought of Tagore, who was introduced in Korea as the world-famous poet who won the Nobel Prize for Literature and also was a thinker of a country under colonial rule as a person from the Buddhist country India. The basis of Tagore’s thought is Upanishad, the fundamental idea of which is that Brahman and Atman get into oneness transcendent from this world (samsara). Thus, the ‘Nim’ expressed in Tagore’s poems is Brahman, the absolute being as the basis of life and also the object of love and bliss. Tagore’s and Han Yong-Woon’s poems show some similarities in which both explore the essence of “Love” and “Existence” and show the shared interest in the basis of human life and happiness. But Han Yong-Woon also shows some dissimilarities in the perceptions of colonial reality and its counteracting method. Han Yong-Woon criticized Tagore’s attitude of not directly participating the colonial reality and disapproved his praising the death as the symbol of transcending this world and unifying Brahman and Atman. The dissimilarities come from the differences between their perception of colonial reality and the ideological differences between Tagore’s Hinduism and Han Yong-Woon’s Zen Buddhism.

냉동공조시스템에서의 에너지 절약을 위한 인버터 활용기술

정석권 대한설비공학회 2001 대한설비공학회 강연회 및 기타간행물 Vol.- No.-

랄프 왈도 에머슨의 시와 동양사상

정석권 세계문학비교학회 (구 한국세계문학비교학회) 1997 世界文學比較硏究 Vol.2 No.-

유도전동기의 토크 속응제어법에 관한 벡터적 해석

정석권 부산수산대학교 산업기술연구소 1995 産業技術硏究所 硏究報告 Vol.6 No.2