• Journal of Theoretical and Applied Mechanics
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• 제3권1호
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• pp.66-80
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• 2002

The bilinear formulation proposed earlier by Peters and Izadpanah to develop finite elements in time to solve undamped linear systems, Is extended (and found to be readily amenable) to develop time finite elements to obtain transient responses of both linear and nonlinear, and damped and undamped systems. The formulation Is used in the h-, p- and hp-versions. The resulting linear and nonlinear algebraic equations are differentiated to obtain the first- and second-order sensitivities of the transient response with respect to various system parameters. The present developments were tested on a series of linear and nonlinear examples and were found to yield, when compared with results obtained using other methods, excellent results for both the transient response and Its sensitivity to system parameters. Mostly. the results were obtained using the Legendre polynomials as basis functions, though. in some cases other orthogonal polynomials namely. the Hermite. the Chebyshev, and integrated Legendre polynomials were also employed (but to no great advantage). A key advantage of the time finite element method, and the one often overlooked in its past applications, is the ease In which the sensitivity of the transient response with respect to various system parameters can be obtained. The results of sensitivity analysis can be used for approximate schemes for efficient solution of design optimization problems. Also. the results can be applied to gradient-based parameter identification schemes.

• 디자인학연구
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• 제14권2호
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• pp.137-146
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• 2001

In this paper it is investigated that the visual elements of preference which influence the visual preference for bench. "What color of bench is preferred when the location is the same\ulcorner" Started from those questions, the elements of preference which influence the visual preference for bench is investigated. In this research, a equal standard mark system is applied for the evaluation of visual elements of preference and then the relationship between the visual preference and the elements of preference are examined by the method of multiple regression analysis. The result of primary factor analysis from the visual evaluation in this paper will affect visual preference of the bench in urban park. Thus, the result of this study will contribute to development of urban parks for the maximum satisfaction of park visitors supplying necessary information for a resting place planning and design. It will provide a useful management guide of urban park facilities to prepare a strategic management plan of the benches from the users point of view. Especially, to know the correct preference of people, which will be provided by the evaluation of visual preference to bench will be the key to rest place planning.

• 컴퓨터교육학회논문지
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• 제19권1호
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• pp.53-62
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• 2016

컴퓨팅 사고력은 컴퓨터를 기반으로 하는 문제해결에 관한 하나의 사고 과정으로 정의될 수 있기 때문에 일반적인 문제해결의 과정에서 관련된 컴퓨팅 사고력 개념들을 살펴보는 것은 컴퓨팅 사고력을 이해하는데 도움이 될 수 있다. 이를 위해 본 연구에서는 관련 연구를 통해 컴퓨팅 사고력의 핵심 요소들을 뽑아내고 그러한 요소들이 문제 해결과정에서 어떻게 사용되는지를 기술한다. 또한 문제해결과정에서의 컴퓨팅 사고력 요소들을 인지적인 측면에서 살펴본 후, 각 단계에서의 학습활동과 학습평가 요소들을 기술한다. 이를 기초로 문제 해결의 관점에서 컴퓨팅 사고력을 위한 기본 수업 프레임워크를 제안한다.

• 디자인학연구
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• 제19권2호
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• pp.355-364
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• 2006

애니메이션에서 등장하는 캐릭터들은 다양한 외형적인 모습과 성격들을 소유하고 있다. 이러한 개성과 성격들은 일반적으로 형태, 행동, 대화, 걷기 동작 등과 같은 다양한 요소들에 의해 표현된다. 특히, 걷기 동작은 캐릭터의 움직임 표현에 있어 가장 기본적인 요소이면서 캐릭터의 개성표현에 중요한 부분을 차지한다. 본 연구에서는 캐릭터의 특징이 잘 표현된 애니메이션들을 중심으로 음양오행이론을 접목하여 외형적 모습과 성격에 따라 캐릭터들을 분류한다. 그리고 분류한 캐릭터들의 동작을 분석함으로써 캐릭터의 개성과 움직임간의 관계를 제시한다.

• Ocean and Polar Research
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• 제43권4호
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• pp.335-352
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• 2021

Trace elements in the ocean have been known as essential micronutrients for the primary production of phytoplankton and the growth of marine organisms. The GEOTRACES program beginning in the mid-2000 provided a new understanding of the distribution, origin and behavior of trace elements in the ocean, together with the establishment of both clean seawater sampling and trace element analysis techniques. The Indian Ocean, one of the major oceans, is relatively the least explored area, despite playing an important role in global climate variability. Although trace element observations have recently been conducted in the Indian Ocean by Japanese-and Indian scientists, relatively not much study has been done compared to the Atlantic, Pacific and Polar Regions. Recently, together with the launch of R/V Isabu, a 5,000-ton grade large- and comprehensive research vessel, the observations of trace elements has been conducted in the Indian Ocean for the first time in Korea since 2018. In this paper, we introduce the key results of currently conducted GEOTRACES expedition in the Indian Ocean to present future trace element research directions in the Indian Ocean, and also reviewed the preliminary results in the Indian Ocean studies from Korea. In the 2020s, new Indian Ocean GEOTRACES projects are planned around European countries, and it is time for Korea to prepare for the next phase of the trace element study in the Indian Ocean in line with these international trends.

• 대한건축학회논문집:구조계
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• 제33권12호
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• pp.29-36
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• 2017

A recent global trend in the increase of earthquake-related disasters has become so frequent as to cause various damages to a wide range of mid- to high-rise buildings. Particularly, more attention is being paid to the effect of horizontal load in high-rise buildings not only on the key structural elements of the structures, but also on the possibility of the secondary damages to them due to the failure of exterior panels, which are non-structural elements, but such damages are difficult to cope with as they may be caused by unexpected changes. The present study examined exterior panels using moving clips to prevent such secondary damages on the non-structural elements and analyzed the structural performance of these exterior panels through the finite element analysis and the shaking table test. The analysis results showed that the exterior panels using moving clips satisfied the structural performance against the allowable story drift of KBC2009 and the safety of the exterior panels was verified by the shake table test.

• 한국과학교육학회지
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• 제27권6호
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• pp.529-545
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• 2007

Questioning forms an integral part of most strategies for effective teaching when the class consists of difficult content. Science including chemistry is usually content-rich, but difficult to understand without supporting lab experiments, subsidiary visual materials and model kits. Engaging the attention and interest of students in such a subject, therefore, is the key to the success of a daily lesson in the classroom. However, generating meaningful questions requires a certain level of information and metacognitive skills on the part of the teacher. The purpose of this study was to find out the framework of effective teachers' questioning with a large group in chemistry class: how teachers used questioning to engage their students in such a big class, to identify a variety of forms of feedback provided by students and to develop a model of question-inducing strategies. We investigated the teachers' recognition of their questioning and the students' recognition of teachers' questioning by surveying over 82 teachers and 434 students in Korea. The survey findings show that the questionnaire can be categorized into four elements: the theme of the teachers' questions (T), students' inquiries (I), methods of teachers' questioning (M) and encouragement of students (E). These elements can be analyzed and sub-categorized to find out which elements are effective in good questioning, even though the elements are interwoven tetrahedrally.

• 디자인학연구
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• 제17권3호
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• pp.179-188
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• 2004

최근까지 제품디자인에 있어서의 조형요소의 심미성에 관한 연구가 많이 진행되어 왔다. 그러나 기존의 연구는 "심미성 요인이 무엇인가\ulcorner"에 초점을 맞추어 왔을 뿐 각각의 심미적 요소들이 사용자의 심미적 반응에 어떻게 영향을 미치는지에 대해서는 그다지 연구된 바가 없다. 따라서 본 연구는 제품 디자인에서 심미성 요소를 내용미와 형태미로 나누어 서로의 상관관계를 파악하고 사용자의 심미적 반응에 어떠한 영향을 미치는지를 알아보는 연구이다. 더욱이 연구의 초점이 내용미 중 전형성을 형태미 중 리듬을 중심으로 서로의 심미적 반응의 영향 정도와 가격과 브랜드력 같은 조절변수에 의해 심미적 반응이 어떻게 달라지는지를 검증하고자 하기 위한 연구이다.본 연구를 통하여 실제로 디자인 현장이나 기업에서 디자인에 있어서 심미적 영향요소를 적용하는 데에 대한 의미 있는 시사점을 제공해주고 디자인의 심미성에 대한 이론적인 체계를 만들어 가는 것에 기여하리라 본다.것에 기여하리라 본다.

• 한국기록관리학회지
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• 제22권4호
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• pp.45-65
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• 2022

공공기관의 유튜브 동영상은 디지털 공공기록물로서 관리 및 보존이 필요하다. 이때 동영상 자체와 동영상을 설명하는 메타데이터도 함께 보존해야한다. 본 연구의 목적은 공공기관이 유튜브에 발행한 동영상을 아카이빙할 때 필요한 핵심 메타데이터 요소를 선정하는 것이다. 이를 위해 NAK 8, PREMIS, ISAD(G), 유튜브 메타데이터를 참조하여 설명, 구조, 관리, 보존, 이용자 참여의 5개 상위 영역, 10개 하위 영역의 메타데이터 요소를 설계하였다. 이후 14명의 전문가를 대상으로 설계한 메타데이터 요소를 검증하였다. 마지막으로 평가 결과에 대한 타당도 검증과 신뢰도 검증을 진행하였다. 타당도와 신뢰도 검증의 기준값을 모두 만족하는 요소는 63개 측정 요소 중 33개 요소로 확인되었다. 해당 요소들을 공공기관 유튜브 동영상 아카이빙을 위한 메타데이터 핵심 요소로 선정하였다.

• Asian-Australasian Journal of Animal Sciences
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• 제21권1호
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• pp.11-18
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• 2008

We created a cDNA microarray representing approximately 3,500 pig genes for functional genomic studies. The array elements were selected from 6,494 cDNA clones identified in a large-scale expressed sequence tag (EST) project. These cDNA clones came from normalized and subtracted porcine adipose tissue cDNA libraries. Sequence similarity searches of the 3,426 ESTs represented on the array using BLASTN identified 2,790 (81.4%) as putative human orthologs, with the remainder consisting of "novel" genes or highly divergent orthologs. We used the gene microarray to profile transcripts expressed by adipose tissue of fatty Chinese Xiang pig (XP) and muscley Large White (LW). Microarray analysis of RNA extracted from adipose tissue of fatty XP and muscley LW identified 81 genes that were differently expressed two fold or more. Transcriptional differences of four of these genes, adipocyte fatty acid binding protein (aP2), stearyl-CoA desaturase (SCD), sterol regulatory element binding transcription factor 1 (SREBF1) and lipoprotein lipase (LPL) were confirmed using SYBR Green quantitative RT-PCR technology. Our results showed that high expression of SCD and SREBF1 may be one of the reasons that larger fat deposits are observed in the XP. In addition, our findings also illustrate the potential power of microarrays for understanding the molecular mechanisms of porcine development, disease resistance, nutrition, fertility and production traits.