• Journal of Advanced Marine Engineering and Technology
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• 제26권1호
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• pp.23-29
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• 2002

Solid-liquid phase change (i.e. melting or solidification) occurs in a number of situations of practical interest. Some common examples include the melting of edible oil, metallurgical process such as casting and welding, and materials science applications such as crystal growth. Therefore, due to the practical importance of the subject, there have been a large number of experimental and numerical studies of problems involving phase change during the past few decades. Also, this study presented the effective way to enhance phase change heat transfer.

• 인문언어
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• 제1권1호
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• pp.3-11
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• 2001

This article maintains that language not only connects the domains of objectivity and subjectivity but simultaneously occupies its own autonomous realm and creates the two domains as well. This means that the role of language in recognizing things in the universe is more important than we usually think, and that the system of language exists independently of the human thinking and objective reality. In this respect, study of language stands as a core subject in humanities, making itself a common denominator for full understanding of philosophy, theology, history, psychology, and arts.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제13권4호
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• pp.297-307
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• 2009

This research examined intuitive knowledge of 6th grade students in Israel prior to the formal learning of percentages in school. In other words. the research investigated knowledge of basic concepts and familiarity with the usage of percentages in daily life. Results have shown that students are familiar with the concept of percentages and thai some students are able to handle simple problems composed of common percentages (50% and 25%). However, it was also found that many students had misconceptions that should be taken into account while the subject has been taught.

• 영재교육연구
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• 제11권3호
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• pp.99-129
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• 2001

본 연구의 목적은 학생들의 학습활동에 관련된 동기화 요인이 무엇이며 초·중학교 영재 집단과 영재 집단에 어떠한 차이가 있는지를 암묵적 이론의 견지에서 알아보려는 것이었다. 조사결과 학생들이 가장 동기화 되어 있는 학습활동은 모든 집단에서 영어와 수학이었다. 영어와 수학과 같은 교과를 더 열심히 하고자 하는 이유로는 재미, 필요, 경쟁, 자존심, 진학, 부모님의 권유, 칭찬, 처벌회피 등 28가지로 나타났다. 학습활동의 원인에 관한 요인분석의 결과 초등학생의 경우, 4가지 요인이 나타났으며, 이들 중 공통된 요인은 유용성이다. 두 집단간 차이로서 초등학교 영재 집단은 인정, 흥미 요인이 나타나는 반면, 초등학교 영재 집단은 지식획득이 중요요인으로 나타났다. 중학생의 경우, 5가지 요인이 나타났으며, 인정, 흥미, 유용성 요인은 공통적이다. 차이로는 영재 중학생에게서 지식획득 요인이 나타나는 반면, 영재 중학생에게서는 경쟁 요인이 나타난 점이다.

• Acta Via Serica
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• 제1권1호
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• pp.69-93
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• 2016

This article compares two Iranian towers (burj) of the Saljuq period (c.1037-1194) with two Chinese Pagodas (t'a) of the Song dynasty (c.960-1279) in order to identify common cultural trends in medieval Iranian and Chinese architecture. To this end, the Iranian towers of Tuqrul in Rayy and Chihil Dukhtar in Damghan are compared with their Chinese counterparts of the Iron Pagoda in Kaifeng and the Pizhi Pagoda in Changqing. The two Iranian towers have much simpler architectural decorations compared to the splendid Song pagodas, which are decorated with statues and colorful paintings. The similarities in form, however, suggest common functions provided by the architecture. Both the Saljuq and Song towers had astronomical and military functions, position identification for travelers, and symbolic meanings, as well as their main functions as tombs. By applying comparative studies on the forms and functions of the Tuqrul and Chihil Dukhtar towers on the one hand, and the Iron and Pizhi Pagodas, on the other hand, this article aims to contribute new insights regarding common social trends shared by the medieval Iranian and Chinese and illustrated by their architecture. Extensive and distinguished publications on the general subject of art and architecture during the reign of the two dynasties under discussion already exist, as fully referenced below, but the specific comparative themes regarding the individual sites discussed here are the first in any study of this kind.

• 경영과학
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• 제19권1호
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• pp.129-142
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• 2002

Data fusion Is a technique used for creating an Integrated database by combining two or more databases that include a different set of variables or attributes. This paper attempts to apply data fusion technique to customer relationships management (CRM), in that we can not only plan a database structure but also collect and manage customer data In a more efficient way In particular our study Is useful when no s1n91e database Is complete, i.e., each and every subject in the pre-integrated database contains somewhat missing observations. According to the way of treating the common variables, donors can be differently selected for the substitution of the missing attributes of recipients. One way is to find the donor that has the highest correlation coefficient with the recipient by. treating common variables metrically The other is based on the closest distance by the correspondence analysis in case of treating common variables nominally. The predictability of data fusion for CRM can be evaluated by measuring the correlation of the original database and the substituted one. A Monte Carlo Simulation analysis is used to examine the stability of the two substitution methods in building an integrated database.

• 한국농촌건축학회논문집
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• 제13권3호
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• pp.61-72
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• 2011

The purpose of this study is to examine and investigate the characteristics of locational facilities and the purchase and leisure patters of residents with its focus on downtown streets of Yeongam-eup which is a eup-level small town. In the subject downtown streets, commercial and residential functions coexisted. While most locational facilities were small-scale sale(buy), food(eat), and employment(public institutions) facilities which were needed for neighborhood life and supporting daily life, the lack of facilities which supported leisure life(enjoy) and represented small town identity was found. The most common frequency of using downtown streets by residents was 'almost everyday'; the most common intention to use was 'to purchase daily things'; and the most common purchase good was 'groceries', followed by farming machines, books, and stationery. It suggested that the use of downtown streets was characterized by daily neighborhood life. In particular, it was found that expensive goods(more than 500,000 won) were commonly purchased in neighboring middle or large cities. Thus, it is necessary to consider the option and professionality of goods. Finally, it is necessary to consider residents' accessibility through reorganizing a street form from car-focused to pedestrian-focused.

• 한국정보교육학회:학술대회논문집
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• 한국정보교육학회 2004년도 하계학술대회
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• pp.28-37
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• 2004

제7차 교육과정의 시행과 함께 본격화된 교육 정보화에 대한 노력으로 일선 학교의 각 교과별 수업에서 ICT를 활용하여 교육 정의화를 구체적으로 실현하는 시점에 이르렀다. 그러나 이러한 현실적인 시급함에도 불구하고, 아직까지 실제적인 ICT 도입방향이나 활용 방안에 대한 구체적인 논의와 연구가 충분히 이루어졌다고 보기는 어렵다. 학년 급별로 정보통신기술과 관련된 목표를 정하고 학습자들을 체계적으로 가르친다는 계획은 그 자체로서 매우 가치가 있는 일이나 그 수준과 목표를 어떻게 설정하는가는 교육의 성공 여부와 직결되는 문제라는 점에서 상당한 논의와 실험을 거쳐야 할 것이다. 따라서 본 연구는 초등 교과에 나오는 각 교과의 교육 목표를 분석하고 외국 교육과정을 분석해 봄으로써 초등학교에서 컴퓨터 교육 목표를 제언하고자 하였다.

• 음성과학
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• 제15권3호
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• pp.159-173
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• 2008

The purpose of this study was to use fiber-optic nasolaryngoscope to find out differences in laryngeal behavior between persons who stutter(PS) and those who do not stutter(NS) upon their utterance. To meet the goal above, this study took 5 NS and 5 PS respectively as a part of sampling, so that they were all asked to join an experiment hereof. As a result, this study came to the following findings: First, there was not any significant difference in laryngeal behavior of uttering spoken languages between stuttering group and control. Second, there were some differences in laryngeal behavior of repetition and prolongation, which were a sort of disfluency revealed in the utterance of nonfluent spoken languages between stuttering group and control. Third, as reported by prior studies, it was found that there were differences in laryngeal abehavior of stutterer group's nonfluent spoken languages depending upon stuttering types. In this study, a variety of laryngeal behavior unreported in prior studies could be found. In addition, it was notable that stutterers showed different laryngeal behavior depending on their personal stuttering types. On block condition, Subject 1 showed laryngeal behavior of fAB, INT and fAD; Subject 2 showed laryngeal behavior of fAB, fAD and rAD; Subject 3 showed laryngeal behavior of fAD and rAD; Subject 4 showed only laryngeal behavior of fAD; and Subejct 5 showed laryngeal behavior of fAB, fAD and rAD. Summing up, these findings imply that when stutterers utter nonfluent words, they may reveal a variety of laryngeal behavior depending on their personal stuttering types. Moreover, it is found that there are more or less differences in the utterance of nonfluent spoken languages between NS and stuttering ones. In particular, it is interesting that one common trait of nonfluent spoken languages uttered by PS is evidently excessive laryngeal stress, no matter which type of stuttering they reveal.

• 한국컴퓨터정보학회논문지
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• 제13권5호
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• pp.103-110
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• 2008

전자상거래의 발달로 인해 옥션과 같은 쇼핑몰은 효율적인 서비스를 위해 고객의 개인정보를 수집하고 관리하고 있다. 하지만 옥션의 개인정보 유출로 인해 그 피해가 기업이미지 손상뿐만 아니라 유출된 정보주체인 개인까지 피해를 주고 있다. 기관과 기업에서 개인정보를DB에 평문상태로 저장하고, 역할기반 접근제어기술을 이용하여 개인정보를 보호하고 있지만 DB관리자의 권한만 획득하면 옥션과 같이 개인정보가 쉽게 유출된다. 또한 역할기반 접근 제어기술은 정보주체의 민감한 정보에 대한 보호기술로 적합하지 않다. 이 논문에서는 정보 주체가지정한 민감한 정보를 암호화하여 DB에 저장하고, 정보주체의 개인별 정책에 따라 자신의 정보에 대한 접근을 엄격하게 제한하는 개인별 정책 기반의 접근제어 기법을 제안한다. 제안 기법을 통해 DB관리자로부터 안전하고, 개인정보 보호기술인 역할 기반 접근제어의 문제점을 보완하여 정보주체의 자기정보 제어권을 가진다.