• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2004년도 제22회 춘계학술대회논문집
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• pp.550-559
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• 2004

Theoretical studies have been carried out to examine the influence of the grain geometry-dependent driving forces, which control the internal flow pattern of solid rockets. Numerical studies have been executed with the help of a two-dimensional code. This code solves standard k-omega turbulence equations using the coupled second order implicit unsteady formulation. It has been concluded that the grain port divergence angles have significant leverage on the formation of recirculation bubbles leading for pressure oscillations, flow separation and reattachment. In solid rockets flow reattachment will favour secondary ignition and that will add to the complexity of the starting transient prediction.

• 한국산학기술학회논문지
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• 제18권2호
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• pp.243-253
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• 2017

본 연구에서는 제주도, 상하이, 요코하마 크루즈 항만을 비교하여 제주도가 가지는 강점과 약점을 알아보는 것이다. 이를 위해 Cruise Network 분석 프로그램을 통하여 8개요인(공항, 선석, 비용, 거리, 시내접근성, 쇼핑시설, 소스마켓(배후시장), 관광)비교를 통하여 평가하였다. 세 개의 크루즈 항구를 비교하여 평가한 결과 제주도는 민군복합항을 완공하여 크루즈 2개선석(접안능력)을 확보하는 것만으로도 상하이 크루즈 항만보다 우위에 있을 수 있고, 신공항이 완성되면 요코하마 크루즈 항만보다 우위를 점할 수 있어 향후 동북아시아 최고의 크루즈 항만의 조건을 갖출 수 있을 것이라는 결과를 얻을 수 있었다. Cruise Network 분석 프로그램을 통하여 얻은 결과는 행정 정책이 뒷받침이 되어야 한다는 과제를 안고 있다. 이 연구가 크루즈 항만의 특성 및 배후지 평가를 위항 8개의 요인만을 가지고 각각의 지역을 평가하여 결과를 도출한 점은 평가 대상지지역의 다양하고 복잡한 여건을 충분히 종합하지 못한 한계를 가진다. 그리고 향후에는 크루즈 항만에 대한 평가요인을 세분화 하여 평가할 필요성이 있다. 또한 향후 연구에서는 크루즈 산업의 경제적인 효과와 융 복합 산업으로서의 관련 산업에 대한 연관성을 연구해 볼 필요성이 있을 것이다.

• 수산해양교육연구
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• 제18권3호
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• pp.329-340
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• 2006

The purpose of this research is to know the influence of high school students' activities of Marine Sports on the development of their sociality by comparing students in this activities with those who are not in this activities. The objects of this research are high school students who live in Busan at present. The total number of the object is 146, including 74 students who participated in this organization and 72 students who didn't participate in this organization. We have reached the following conclusion after analyzing the materials according to the methods and procedures of the research. In the domain of activity, the students who are in Marine sport activities are statistically different from those who are not. In the domain of stability, the students who are in Marine sport activities are meaningfully different from those who are not. In the domain of ascendancy, the students who are in Marine sport activities are meaningfully different from those who are not. In the domain of sociability, the students who are in Marine sport activities are meaningfully different from those who are not. In the domain of self-control, the students who are in Marine sport activities are meaningfully different from those who are not.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권5호
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• pp.2211-2232
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• 2018

The unstructured and semi-structured big data in social network poses new challenges in query retrieval. This requirement needs to be met by introducing quality retrieval time measures like indexing. Due to the huge volume of data storage, there originate the need for efficient index algorithms to promote query processing. However, conventional algorithms fail to index the huge amount of frequently obtained information in real time and fall short of providing scalable indexing service. In this paper, a new LIndex algorithm, which is a heuristic on Lucene is built on Neo4jHA architecture that holds the social network Big data. LIndex is a flexible and simplified adaptive indexing scheme that ascendancy decomposed shortest paths around term neighbors as basic indexing unit. This newfangled index proves to be effectual in query space pruning of graph database Neo4j, scalable in index construction and deployment. A graph query is processed and optimized beyond the traditional Lucene in a time-based manner to a more efficient path method in LIndex. This advanced algorithm significantly reduces query fetch without compromising the quality of results in time. The experiments are conducted to confirm the efficiency of the proposed query retrieval in Neo4j graph NoSQL database.

• 한국수학교육학회지시리즈A:수학교육
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• 제63권2호
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• pp.233-254
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• 2024

This paper delves into the symbiotic integration of coding and mathematics education, aimed at cultivating computational thinking and enriching mathematical problem-solving proficiencies. We have identified a corpus of scholarly articles (n=38) disseminated within the preceding two decades, subsequently culling a portion thereof, ultimately engendering a contemplative analysis of the extant remnants. In a swiftly evolving society driven by the Fourth Industrial Revolution and the ascendancy of Artificial Intelligence (AI), understanding the synergy between these domains has become paramount. Mathematics education stands at the crossroads of this transformation, witnessing a profound influence of AI. This paper explores the evolving landscape of mathematical cognition propelled by AI, accentuating how AI empowers advanced analytical and problem-solving capabilities, particularly in the realm of big data-driven scenarios. Given this shifting paradigm, it becomes imperative to investigate and assess AI's impact on mathematics education, a pivotal endeavor in forging an education system aligned with the future. The symbiosis of AI and human cognition doesn't merely amplify AI-centric thinking but also fosters personalized cognitive processes by facilitating interaction with AI and encouraging critical contemplation of AI's algorithmic underpinnings. This necessitates a broader conception of educational tools, encompassing AI as a catalyst for mathematical cognition, transcending conventional linguistic and symbolic instruments.

• 복식문화연구
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• 제6권2호
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• pp.109-126
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• 1998

The purpose of this study was to analyze the expressional characteristics of the machine aesthetics in the fashion design. First, this study was started from analyzing mechanical beauty represented on the early 20th century art style. Machine aesthetics has influenced on the art and fashion design from modern to now. Futurism was grounded in the complete renewal of human sensibility brought about by the great discoveries of science. Especially, Russia avant-garde was inspired by the Futurism, that is Rayonism, Constructivism, Suprematism. Kasimir Malevich moved on immediately to purely abstract paintings of which the first was a black square on a white canvas. He had begun the art he called 'Suprematism'. Malevich's geometry was funded on the straight line, the supremely elemental form which symbolized man's ascendancy over the chaos of nature. The square was the basic suprematist element and was a repudiation of the world of appearances, and of past art. He repudiated any marriage of convenience between the artist and the engineer. Vladimir Tatlin made some of the most revolutionary works of modern art, these were the first works to be called 'construction'. Constructivists believed that the essential conditions of the machine and the consciousness of man inevitably create an aesthetic which would reflect their time. They eulogized simple shapes. That believed that buildings and objects should be freed from the ornamental excrescences and the accumulated barnacles of past art. Consequently, under the theoretical background, the result is as follows. First, The functional formativeness of machine aesthetics was expressed as a geometrical silhouette, construction line, non-ornamental construction, simple color in the 20th century design. Second, The mechanical formativeness of machine aesthetics was expressed as a construction of new material-iron, aluminium, plastic, glass-, geometrical form of material in he 20th century design. That is, machine beauty has more concerned with the expressional ideology of the art style and the formativeness of fashion design by silhouette, construction line, material, form.

• 복식문화연구
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• 제31권5호
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• pp.573-585
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• 2023

Comprehending the prevailing ideals of the body within a specific era requires grasping the intricate interplay between social phenomena and the evolution of clothing. Accordingly, this study investigates the distinctive facets of the perception of the Neo-Confucian body as reflected in men's dress during the Joseon Dynasty. We examine a comprehensive body of scholarship, literature, and historical records concerning the body and dress. Additionally, we also employ a framework developed by M. Y. Kim, which categorizes the Neo-Confucian body in three ways: as the natural body, the cultural body, and the body as a fully-realized moral subject. Our findings unveil three crucial insights: firstly, guided by Neo-Confucian discourse positing appearance as a manifestation of innate energy (氣), men's dress was deliberately designed to demarcate stylistic distinctions in women's dress; secondly, the Chinese gwan (冠) was employed as a tool of self-cultivation (修身) to symbolize the legitimacy of Joseon's Neo-Confucian governance; and thirdly, sim-ui (深衣), a philosophical emblem of Confucianism extensively represented across through an intensified exploration of historical sources, served as a means to consolidate the political standing of the Neo-Confucian faction. As a consequence of these factors, the attire of noble men conferred upon them both sexual and moral ascendancy as political entities; men's dress became a visual manifestation of the legitimacy of their power, thus embodying Neo-Confucian ideals. This study carries significance by applying a discourse analysis approach to Korean dress research and elucidating the factors underlying the development of men's dress during the Joseon Dynasty.

• 대한간호학회지
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• 제4권2호
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• pp.131-143
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• 1974

Antenatal care is zoomed toward3 assisting the Individual to achieve safe and wholesome state of health during pregnancy. Nature of fear is assumed to be rooted to complex interaction between past experiences, human relationship and present state of health, however. specific relationship between fear and the variables have not yet been ascertained. This study is designed to investigate the nature of fear of pregnancy, and the correlation between fear and the personal and environmental variables such as personal characteristics past experiences. and psycho-social factors. During the period from October 23 to November 5, 215 pregnant and 104 non-pregnant women of similar chronological are group residing in Seoul were interviewed according to check-list by random General anxiety test, general personality test and test for fear of pregnancy, family according to specific variables such as past experiences of Pregnancy and childbirth, structure of family, family relationship and month of pregnancy was done to the group of pregnant women. To non-pregnant group, general anxiety test was performed to compare with pregnant group. Results of the study are as follows; 1. Hypothesis 1; Degree of general anxiety will be higher e pregnant women compared to that of non-pregnant women. There is no significant difference between the general anxiety of pregnant women and that of non-pregnant women. Therefore, hypothesis I is rejected. 2. Hypothesis 2: Fear of pregnancy and general anxiety will be correlated with personality factors. Through test for fear of pregnancy and general anxiety, a meager contra-correlation between fear and only two personal factors (R and E factor) is revealed but there is no significant correlation between fear and other personal factors (A.S. and T factor). Degree of fear of pregnancy tends to b: higher in the group with low personality factors; responsibility and emotional stability expect the correlation between ascendancy, sociability, and confidence-inferiority. non-significant. Through general anxiety test, level of general anxiety tends to be higher in the group. with low personality factors; responsibility. emotional stability, and confidence except ascendency and sociability, non-significant. Hypothesis 2 is partially supported. 3. Hypothesis 3; General anxiety and fear of pregnancy will be correlated with the past experience-ol pregnancy, and child-birth experience. Though general anxiety test and test for fear of pregnancy, non-significant difference is revealed by P〉.05 level Hypothesis 3 is rejected. 4. Hypothesis 4: General anxiety and fear of pregnancy will be correlated with the month at pregnancy will be correlated with the month of pregnancy. Through tests of general anxiety and fear, significant correlation is revealed degree of fear by-P〈.05 level (CR=1.98) and level of general anxiety by P〈.005 level (CR=3. 11) is higher in the earlier stage of pregnancy. Hypothesis 4 is supported. 5. Hypothesis 5, 6, 7; General anxiety and fear of pregnancy will be correlated with socio-economic status, family structure, and family relationship. Through general anxiety test and tear of pregnancy test, non-significant is revealed by P〉.05 level. Hypothesis 3.6.7 are rejected. Conclusion and recommendation Level of general: anxiety and degree of fear of pregnancy is shown not to be correlated with variables of past experiencers of pregnancy and child-birth. and family factors except the month of - pregnancy. Personal characteristics are shown to be partially contra-correlated meagerly with genera anxiety and fear of pregnancy. This study revealed contrasted results, in regard to presence of correlation between general anxiety and fear of pregnancy to other thesis. In this context. further studies under controlled environment is recommended.

• 국제지역연구
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• 제13권3호
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• pp.191-210
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• 2009

에너지 안보는 국방, 경제, 사회 모든 분야에 있어 중요한 영향을 미치는 요인으로서 그 중요성이 날로 더해지고 있다. 그러나 현재까지 에너지 안보를 계산해 낼 수 있는 방법 및 국제간 비교가 가능한 안보지표의 개발은 이루어지지 않았다. 본 연구는 에너지 수입국의 입장에서 에너지 안보를 측정할 수 있는 객관적 지표를 활용하여 에너지 안보 수준을 국가별로 비교하였다. 연구에서 제시된 국가별 안보지표를 바탕으로 국가별 안보수준에 대한 비교와 함께 에너지 안보 수준이 높거나 낮은 원인을 분석하였다. 본 연구의 의의는 수입국의 입장에서 에너지 안보를 객관적으로 측정할 수 있는 방법을 제시하였으며, 이를 바탕으로 LNG 자원에 대한 국가별 에너지 안보율을 측정하였다는데 있다. 이 방법은 다른 에너지원을 활용한 안보율 비교에도 충분히 적용될 수 있으며, 에너지 안보에 영향을 미치는 요인들도 모델에 반영함으로써 일국의 에너지 안보의 향상 혹은 저하를 측정할 수 있다. 또한 최근 해외에너지에 대한 자주개발과 관련하여 자주개발률을 높이는 것이 한국의 에너지 안보에 긍정적 영향을 줄 것인가에 대한 논의도 동시에 진행할 수 있으며, 연구의 결과 자주개발률을 높이는 것이 에너지 안보의 향상에 긍정적 영향을 미치는 것으로 분석되었다.

• 동남아시아연구
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• 제27권3호
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• pp.1-47
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• 2017

인도네시아 시민윤리교육 교과서는 인도네시아식 민주주의와 그 가치에 대해 설명할 때, 보편적인 민주적 원칙과 반대의 자유 및 소극적 자유, 그리고 기본 권리의 보장 등과 같은 내용들을 모두 다루고 있다. 그러나 자유민주주의, 자유주의와의 차별화를 통해 통합과 안정을 상대적으로 강조하는 경향을 보인다. 이는 유기체국가주의와 가족주의 국가관의 철학을 적용시킨 독립 당시의 국가관, 그리고 빈번한 집단폭력의 경험이라는 역사적 맥락에 근거한다. 인도네시아의 특성에 따라 교과서 내에서 상대적으로 통합과 안정을 강조하는 경향이 드러나기는 하지만, 민주주의에 대한 기본적인 설명에 '참여의 자유'와 '반대의 자유'를 모두 포함한 '소극적 자유'의 구체적인 내용을 모두 적시하고 있기 때문에 교과서에 반영되어 있는 유기체국가주의는 변화의 과정을 겪고 있다. 그리고 개인의 권리와 자유의 중요성과 필요성을 말하는 동시에 국가의 통합과 안정이 상대적으로 강조되는 것은 변화의 과정에서 발생하는 논리적 긴장이라고 해석하였다. 교과서의 서술 방식과 그 경로를 따라 자유 및 권리와 관련된 교육내용을 점검했을 때 일부 개념의 설명과 사례를 소개하는 부분에서 개념의 원칙 및 규범과 그러한 원칙과 규범을 인도네시아에 적용하는 설명 간에 일종의 논리적 긴장과 오류가 발견되었다. 또한, 개념뿐만 아니라 마르시나 사건과 무니르 사건과 같은 구체적인 인도네시아의 인권 관련 사례를 설명하는 데 있어서도 사실이 왜곡되거나 간과되는 부분도 존재하였다. 역사적 사실에 대한 왜곡은 교과서가 내용을 서술하는 데에 있어 오류를 범하고 있는 것으로 해석될 수 있고, 개념과 그 적용에 대한 설명 간에 간극이 존재하는 것으로도 해석되었다.