• 대한기계학회논문집A
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• 제30권5호
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• pp.595-601
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• 2006

Design space optimization using design space adjustment and refinement is used to optimize a knuckle in the suspension system of an automobile. This approach is a new efficient method for large-scale topology optimization by virtue of two reasons. First, design space adjustment including design space expansion and reduction is suitable for large-scale problems. Second, the design space refinement can be done globally or locally where and when necessary and thus is very effective in obtaining a target resolution with much less number of elements. Compliance minimization for a knuckle is considered with a realistic working condition to show the effectiveness and superiority of the new approach.

• 한국소음진동공학회논문집
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• 제16권12호
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• pp.1262-1271
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• 2006

Using the physics-based model for the vibration isolation system, the model uncertainties are described. With the model including parameter perturbations, the robust controller to meet the robust performance and stability is designed through $\mu$-synthesis by DK-iteration. The order of controller is reduced by virtue of Hankel norm approximation technique to allow the efficient implementation in the real-time experimental environment without any performance degradation. The performance of the reduced $\mu$-controller is accessed in comparison with the original one. The experiments validate the superiority of the proposed control scheme against the model uncertainties and its applicability with varying payload.

• 복식
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• 제18권
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• pp.111-131
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• 1992

This thesis was designed to study Symbolics of Chinese Liturgical Vestments. Chinese who regarded the life of human beings as the combination of heaven and earth considered garments as the traditional product of the movement of nature. Accordingly, they thought human beings are the center of the universe composed by heaven and earth and the chief of all things; therefore man only can utilize clothes to distinguish from all of the colours. This views of clothes led to the development of liturgical vestments esteemed courtesy than anything else, especially the thought of courtesy associated with Conficius who regarded courtesy as the highest things and since then the theory of Five Elements and courtesy were inherited by all the adherents of Conficius. Yin and Yang Five Elements in the liturgical vestments was given absolute symbolics in both formative side and in colourful side. results of research studied in this was can be summed up as follows : 1. The crown of rites was made imitating after the system of head, horn, beard, bread of birds and beasts and that form of crown is front-circ-ular and back-rectangular meant to be towards light and dark. That the upper part of faceplace is black represented the way of heaven and lower part of red symbolized the way of earth. 2. Upper vestment of liturgical rites symbolizes heaven and outskirt represented earth. So front of outskirt is YANG and back is Yin. It is why then are going to harmonize positive and negative making front part three width and back part four width. Therefore, emperor who symbolizes heaven made the subjects recognize high and low and wore Dae-gu(大 ), Kon-bok(袞服), Bel-bok, Chui-bok, and Hyonbok according to the object and position of rites so that he may rule the country based on courtesy. 3. As an accessory of liturgical vestments, Bul, Pae-ok, Su, Dae-dai, Hyok-Dai, Kyu, and Hol were used. Before Bul was used man dressed skirt as the first waist-dress in order to conceal intimate part of the body. Pae-ok, as decoration blended with jade was worn by men of virtue, so men of virtue symbolized morality and virtue by Pae-ok. Su began from Yeok, connected with Pae-su , in Chou-dynasty is said to be originated by practical needs and they are divided into large Su and small su, and maintained as decoration to signify the class positions. Dae-dai did the work as not to loose the liturgical vestments and leather belt hang Bul and Su to begin as the function of practical use are in later years it became decoration to symboliz e the class position. Kyu was a jade used when empeor nominated feudal lords and observe ceremony to God and Hol, was held in hands to record everything not to forget. These Kyu and Hol became to offer courtesy during the time of rites and in later years it became used according to class position rather than practical use. 4. As far as colours are concerned, colours based by five colours according to YIN-YANG Five Elements theory and they were divided into a primary colour and a secondary colours. Primary colours corresponded with the theory of Five Elements each other, Blue, Red, Tellow, White, and Black symbolized ive Elements, five hour space, five directions, and five emperors. Secondary colours contradict with Blue, Red, Yellow, White and Black and another as a primary colour and they are Green, Scaret, Indigo, Violet, Hun colour, Chu colour, and Chi colour. This primary colour was used in liturgical vestments, that is, upper-vestments used black colour. This primary colour was used in liturgical vestments, that is, upper-vestments used black colour as primary colour and outskirt was used Hun colour as secondary colours. Thus symbolism in chinese liturgical vestments mainly began with heaven and earth and corresponded with YIN-YANG Five Elements Scool. They were developed as the scholary theory and Conficius and his followers in the later days and continued up to Min-dynasty.

• 한국체육학회지인문사회과학편
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• 제55권3호
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• pp.15-25
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• 2016

이 연구는 퇴계의 경(敬)을 중심으로 운동하는 몸에 대한 생태윤리학적 접근을 시도하였다. 인간과 자연의 갈등원인은 인간의 욕망에서 비롯된 잘못된 자연관을 들 수 있다. 퇴계는 욕망의 문제를 경을 통해 극복할 수 있다고 보았다. 퇴계 경사상의 생태윤리학적 접근 가능성은 다음과 같다. 첫째, 퇴계의 경은 자연 속에서 완성된 것이기에 가능하다. 둘째, 퇴계의 경은 자연에 대한 인간의 책임(배려)을 강조한다. 셋째, 경은 도덕 실천능력과 연관되기 때문이다. 한편, 퇴계는 '몸을 잘 보존하는 것'이 자기보존인 동시에 자연의 순리를 따르는 천리의 의미로 이해하였다. 이러한 관점에서 운동하는 몸은 신체건강과 마음건강의 의미가 존재하며 동시에 인간과 자연을 하나의 관계망으로 이해하여 자연 질서를 따르는 생태적 가치의 측면도 존재한다. 운동하는 몸을 통한 경의 획득은 '경신(敬身)'과 '활경(活敬)'의 실천을 제안한다. 자연과 함께하는 신체운동을 할 때 몸을 공경하는 '경신'의 단계에 머무르는 것뿐만 아니라 생태환경을 보전(活敬)하면서 자연을 통해 요산요수(樂山樂水)의 덕을 함양하는 단계로 나아가는 것이다.

• 건축역사연구
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• 제26권6호
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• pp.29-40
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• 2017

Soswaewon as a typical villa garden of Korea is a symbolic garden that its diverse compositions imply a specific meaning. This study reviewed the purpose of introduction, meaning, and location of the landscape plants as one of the compositions and covering quite a large part of Soswaewon through 48 Yeong (meaning 48 poems of Soswaewon) and Soswaewondo (meaning Map of Soswaewon). In 48 Yeong, 27 verses describe landscape plants as their key poetic matters. The most frequently mentioned top 3 plants are bamboos, pine trees, and Japanese apricots. The three plants are called Sehansamwoo(歲寒三友) showing constant fidelity and loyalty in any changing situations, which was regarded to represent the nature of scholars. And also the study examined the frequency and planting location of the plants in Soswaewon by comparing 48 Yeong and Soswaewondo, and the result showed some differences between them. That seems to be caused by the limitations in the comparison, because in case of 48 Yeong, the location and frequency of landscape plants can be examined only through the context of the verses, and Soswaewondo showed different production time from 48 Yeong and expressed them only in a form of drawing. The plants have symbolic meanings multi-layered and ambiguous. With their symbolic meanings, the landscape plants reviewed through 48 Yeong consistently represent fidelity and loyalty, man of virtue, and hermit. That is, Soswaewon is the garden granting some significance to its compositions by interacting with the things.

• Journal of Mechanical Science and Technology
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• 제18권9호
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• pp.1537-1548
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• 2004

This paper presents a novel diagnostic technique for monitoring the system conditions and detecting failure modes and precursors based on wavelet-packet analysis of external noise/vibration measurements. The capability is based on extracting relevant features of noise/vibration data that best discriminate systems with different noise/vibration signatures by analyzing external measurements of noise/vibration in the time-frequency domain. By virtue of their localized nature both in time and frequency, the identified features help to reveal faults at the level of components in a mechanical system in addition to the existence of certain faults. A prima-facie case is made via application of the proposed approach to fault detection in scroll and rotary compressors, although the methods and algorithms are very general in nature. The proposed technique has successfully identified the existence of specific faults in the scroll and rotary compressors. In addition, its capability of tracking the severity of specific faults in the rotary compressors indicates that the technique has a potential to be used as a prognostic tool.

• Journal of Korean Neurosurgical Society
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• 제54권5호
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• pp.437-440
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• 2013

The cerebrospinal fluid tap test (CSFTT) is recommended as a key step in the diagnosis of idiopathic normal pressure hydrocephalus (iNPH). While there is no generally accepted evaluation period for ascertaining a CSFTT responder, a substantial number of patients are evaluated only once within 24 hours of the test for improvement in gait. We report an iNPH patient with a favorable response to shunt surgery, who was first judged a non-responder by this standard, though subsequently was judged a responder in virtue of repetitively testing gait over 7 days. A 68-year-old man presented with progressive impairment of gait, balance, and memory. He was diagnosed as iNPH with an Evans' ratio of 0.35. At first hospitalization, change in gait was evaluated 24 hours after the CSFTT. He didn't show any significant improvement and was judged as a non-responder. However, at the second CSFTT, we repetitively tested his change in gait over seven days. Forty-eight hours after the tap, he showed significant improvement in his gait. He was then confirmed as a responder. After the operation, the gait difficulties were almost fully resolved. Further studies developing the standard procedure of the CSFTT should be considered.

• 고전문학과교육
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• 제15호
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• pp.463-499
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• 2008

This paper aims at investigating the characterization and author's consciousness of Okhwangibong written in about 18th century in Korea. Okhwangibong deals with the historical event in the Later Han of ancient China, that is to say the Empress Gwak's banishment and the royal harem Eum's accession to the queen consort. The author of this work created the focal characters freshly. Particularly Gwak is characterized as the vivid woman who desires the Emperor Kwangmu's love, reproaches his negative attitude toward her wants, and feels pains by reason of his affection to Eum. The author intended to justify Eum's accession to the queen consort through emphasizing Providence and her virtue. But the author's intention could not be realized fully. Because what is called Providence was lost persuasive power, and Gwak was characterized very affirmatively. Therefore it can be said that this work represents Gwak's trials and pains caused by Kwangmu. And the discord of the author's intent and the real meaning of the work occurred the dispute about affection and faithfulness between man and wife in following novels. Consequently the historical meaning of Okhwangibong in Korean Novel can be founded in successful characterization and occurring the dispute in following novels.

• 대한전기학회논문지:시스템및제어부문D
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• 제50권10호
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• pp.479-485
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• 2001

In this paper, we introduce a charge pump phase-locked loop (PLL) architecture which employs a precharge phase frequency detector (PFD) and a sequential PFD to achieve a high frequency operation and a fast acquisition. Operation frequency is increased by using the precharge PFD when the phase difference is within $-{\pi}{\sim}{\pi}$ and acquisition time is shortened by using the sequential PFD and the increased charge pump current when the phase difference is larger than ${\pm}{\pi}$. So error detection range of the proposed PLL structure is not limited to $-{\pi}{\sim}{\pi}$ and a high frequency operation and a higher speed lock-up time can be achieved. The proposed PLL was designed using 1.5 ${\mu}m$ CMOS technology with 5V supply voltage to verify the lock in process. The proposed PLL shows successful acquisition for 200 MHz input frequency. On the other hand, the conventional PLL with the sequential PFD cannot operate at up to 160MHz. Moreover, the lock-up time is drastically reduced from 7.0 ${\mu}s\;to\;2.0\;{\mu}s$ only if the loop bandwidth to input frequency ratio is regulated by the divide-by-4 counter during the acquisition process. By virtue of this dual PFDs, the proposed PLL structure can improve the trade-off between acquisition behavior and locked behavior.

• 철학연구
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• 제137권
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• pp.57-79
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• 2016

이 논문은 현대 도덕 다원주의에 대한 매킨타이어의 비판을 살펴보고 그의 비판이 갖는 한계를 드러내고자 하는 글이다. 오늘날 우리 사회 문화의 두드러진 특징은 중요한 도덕적 문제들에 대한 의견의 차이가 좀처럼 합의를 이끌어내기 어렵다는 점이다. 낙태나 안락사와 같은 문제, 분배적 정의나 재산권 같은 문제, 전쟁과 평화와 같은 문제를 두고 일어나는 논쟁들은 곧장 주장과 반대 주장의 대립으로 귀착되고 만다. 왜냐하면 서로 대립되는 입장을 취하는 사람들이 서로 공통된 기준에 의해 평가할 수 없는 서로 다른 도덕적 전제들에 호소하고 있기 때문이다. 우리는 이러한 상황을 흔히 도덕적 다원주의라고 부르며, 이러한 상황은 자유주의 체제 아래서 사람들이 자신의 이성을 발휘한 자연스러운 결과라고 인정한다. 그러나 매킨타이어는 "덕의 상실"(After Virtue)에서 현대의 이러한 도덕적 다원주의 상황을 격렬히 비판하며, 그 원인은 이른바 '계몽주의적 기획'의 실패때문이라고 진단한다. 매킨타이어에 따르면, 지난 삼백년간 철학을 지배했던 계몽주의의 기획은 역사적 사회적 상황에 영향받지 않으면서 인간의 본성과 목적에 대한 특정한 이해에 좌우되지 않는 합리성의 개념을 마련하려고 하였다. 그러나 그러한 시도는 현실적으로 달성되지 못했을 뿐만 아니라 그러한 시도에는 근본적인 결함이 있기 때문에 결코 달성될 수가 없다. 그 결과 현대의 도덕과 정치 사상은 혼란 상태에 빠지게 되었으며, 이 혼란은 우리가 일종의 아리스토텔레스적인 패러다임으로 전환할 때에만, 그 본질적 요소인 목적론에 토대하여 실천 이성에 대한 설명을 구성할 때에만 벗어날 수 있다. 그러나 "덕의 상실"에서의 그 주장이 갖는 가장 어려운 난점 하나는 우리가 상황 속에 있는 존재, 이야기 속의 존재이기만 한 것이 아니라 우리는 기본적으로 나의 인생의 주인이자 나의 이야기의 저자라는 점에 주목할 때, 과연 현대라는 사회적 상황 속에서 그가 옹호하는 아리스토텔레스적 생각을 다시 적용하는 것이 가능할까 의심스럽다는 점이다. 아울러 자유로운 제도를 지속시키려고 한다면 도덕적 다원주의는 재앙이라기보다는 인간이성이 행사된 자연스러운 결과로 받아들여져야 할 것 같다는 점이다.