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AUTOMATIC HEXAHEDRAL MESH GENERATION FOR FINITE ELEMENT SIMULATION OF METAL FORMING

  • Ryoo S. R.;Hwang S. M.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2002.04a
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    • pp.105-112
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    • 2002
  • A new grid-based approach is presented for automatic generation of hexahedral meshes for simulation of plastic deformation in metal forming. In this approach, special enveloping schemes are applied, to eradicate the sources of the degenerate elements that may appear in a generated mesh. The schemes are described in detail, along with a complete procedure for mesh generation. The capability of the approach to deal with an arbitrary, 3-D process geometry is demonstrated through application to a selected forming problem.

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Simultaneous Optimization for Robust Design using Distance and Desirability Function

  • Kwon, Yong-Man
    • Communications for Statistical Applications and Methods
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    • v.8 no.3
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    • pp.685-696
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    • 2001
  • Robust design is an approach to reducing performance variation of response values in products and processes. In the Taguchl parameter design, the product-array approach using orthogonal arrays is mainly used. However, it often requires an excessive number of experiments. An alternative approach, which is called the combined-array approach, was suggested by Welch et. al. (1990) and studied by others. In these studies, only single response variable was considered. We propose how to simultaneously optimize multiple responses when there are correlations among responses, and when we use the combined-array approach to assign control and noise factors. An example is illustrated to show the difference between the Taguchi's product-array approach and the combined-array approach.

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Mothers' beliefs on the whole language approach and self-reported home literacy practices with their children (총체적 언어접근에 대한 어머니의 신념과 가정에서의 실제 문해활동과의 관계 연구)

  • Song, Seung-Min;Lim, Ae-Ryon
    • Korean Journal of Human Ecology
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    • v.14 no.3
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    • pp.401-409
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    • 2005
  • The purpose of this study is to investigate mothers' beliefs regarding children's literacy development and self-reported home literacy practices with their children. The instrument used for this study measured mothers' beliefs toward the whole language approach against the traditional approaches in children's literacy development. The total number of 340 mothers participated in this study who are sending their children to daycare centers of kindergartens in Seoul and its suburban area. Mean, Standard Deviation, frequency, Spearman's rho, and Kendall's tau were employed to analyze the data. The results showed that mothers' beliefs on the whole language approach have relationships with their home literacy practices, and their demographic characteristics - such as mothers' education, their spouses' education, and income - were also related with mothers' beliefs. The results of this study explore the inter-relationship of mothers' beliefs with home literacy practices, and also the importance of mothers' belief system on children's literacy learning at home.

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The Impact of the Project Approach Utilizing Beans As the Subject Matter on Young Children's Scientific Research Capabilities and Scientific Attitudes (콩을 주제로 한 프로젝트 접근법이 유아의 과학적 탐구 능력과 과학적 태도에 미치는 영향)

  • Cho, Mi-Jeong;Ahn, Chin-Kyeong
    • Korean Journal of Human Ecology
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    • v.18 no.3
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    • pp.631-639
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    • 2009
  • This study examines how the project approach utilizing beans as the subject matter influences young children's scientific research capabilities and scientific attitudes. This examination ultimately aims at developing effective teaching methods and programs that can promote children's scientific research capabilities and scientific attitudes. Thirty six children at H kindergarten in Gunsan, Jeollabuk-do were selected as subjects of this study. The children aged five were divided into an experiment group and a comparison group, with eighteen for each group. Before the experiment, a pre-test was conducted on the children's scientific research capabilities and scientific attitudes. The pre-test results were subject to a t test to identify whether there were differences between the two groups in age as well as the levels of scientific research capabilities and attitudes. A post-test was also conducted to determine the differences between the two groups in these categories. These results have led to the conclusion that the project approach utilizing beans as the subject matter has a positive impact on improving young children's scientific research capabilities and scientific attitudes.

Effects of the Team Approach Rehabilitation Program on Balance, Gait, and Muscle Strength of Lower Extremities for Elderly Patients with Parkinson's Disease (팀 접근 재활프로그램이 노인 파킨슨병 환자의 균형, 보행 및 하지근력에 미치는 효과)

  • Choi, Jin-Young;Jo, Hyun Sook
    • Journal of Korean Biological Nursing Science
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    • v.21 no.3
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    • pp.199-206
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    • 2019
  • Purpose: The purpose of this paper was to verify effects of the team approach rehabilitation program on balance, gait, and muscle strength of lower extremities of elderly people with Parkinson's disease. Method: Subjects of this paper were 40 elderly people with Parkinson's disease, 20 control and experimental groups respectively, who could walk independently and were less than the 2.5 Hoehn &Yahr stage. The team approach rehabilitation program was applied to the experimental group for 12 weeks. Results: There was significant decrease in second at timed up &go test (p= .008), but no significant difference in reach length at functional reach test (p= .201) with partial improvement of balance. There was no significant difference in second at 10-meter walk test (p= .070), but showed tendency of improvement of gait. And number of times at 30s-chair stand test, indicating muscle strength on lower extremities, increased significantly (p= .029), Conclusion: The team approach rehabilitation program has demonstrated its effectiveness on improving balance, and muscle strength of lower extremities for the elderly with Parkinson's disease.

An Approach of the Eastern-Western Nursing for the Health Management of the Women's with Menstrual Disorder (월경장애여성의 건강관리를 위한 동서간호학적 접근)

  • Shin, Hye-Sook
    • Journal of East-West Nursing Research
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    • v.4 no.1
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    • pp.34-43
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    • 1999
  • This study reviewed about Health Management of Women's with Menstrual Disorder and the differences in opinions between the Eastern- Western Nursing Sciences. The purpose of this study was to find out a possible integration of the Eastern-Western Nursing Sciences for Health Management of Women's with Menstrual Disorder and to suggest a distinct frame of Korean Nursing Intervention Method. In the last decade, the women's movement has succeeded in changing in inappropriate and poor treatment. The health consumer movement has also achieved many gains in improving the quality of health care. Yet the medical care offered women during their life stages is still characterized by a lack of effectiveness, safety, and consideration. Today, Although there are differences between Oriental and Western Medicine in approaches to clients, the Eastern-Western Nursing Sciences in approach to clients can be hoped that contribution will be made to the development of nursing intervention which is suitable to Korean context.

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Evaluating the Performance of a Polygon based Approach to Represent Apartment Complexes in a GIS based Hedonic Housing Price Analysis

  • Sohn, Chul
    • Spatial Information Research
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    • v.16 no.4
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    • pp.489-497
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    • 2008
  • Currently, GIS has been widely used in the hedonic analyses of urban apartment housing markets in Korea. In those analyses, the apartment complexes are typically represented as the points or the polygons on the GIS maps and the location variables of the analyses are measured based on the points or the polygons. In this study, the relative performance of the point based approach and the polygon based approach in a GIS based hedonic analysis was compared using the apartment housing market data from the north eastern part of the city of Seoul and Davidson and MacKinnon Test. The results from this study indicate two things. First, two approaches can produce substantially different results in a hedonic price model estimation. Second, the polygon based approach produces a hedonic price model which explains the price variations better than the point based approach. These findings suggest that Korean researchers who are interested in improving quality of hedonic price model estimations and use GIS to measure the location variables for hedonic price models should consider using the polygon based approach with the point based approach. This is because the polygon based approach can produce the location variables with the shortest straight line distances and can explain the housing price variations well.

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A Study on the theory, history and criticism of Colin Rowe - A Criticism of his Liberalism and Formalist Approach - (콜린 로우의 건축론 -그의 자유주의와 형식자적 입장-)

  • Kang, Hyuck
    • Journal of architectural history
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    • v.17 no.1
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    • pp.7-28
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    • 2008
  • Colin Rowe was an important historian, theorist and critic in Modern architecture. His significance in Modern architectural history lies in not only historiography which has changed our view of Modernism but deep theoretical involvement in practice. This study is a critical review and analysis on his formalist approach in Architecture. With a view that his position of formalist has indispensible relationship with liberalism from K. Popper's critical rationalism, this study try to show how his philosophical background has an influence upon his way of seeing architecture, history, form, urbanism, and meaning, etc. And this study also try to explain why the principle of architecture as an autonomous discipline which is the main point of view in Rowe's criticism has been so successful and influential. This study also explain what is the possibility and limitation of Rowe's formalist approach and way of reading buildings. His intelligent way of formal analysis can give us new understandings of how the form generates and the process of design goes on. Furthermore it guide us a new horizon of architecture as a language game. Since his early writings showed both side of formalist approach in architecture and it didn't changed a lot. We can understand his 'Collage City' was a his final answer to his formalist way of making architecture and urbanism. we can estemate it as a utopia without utopianism and an ideology without ideological color.

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Analytical Tools for Ideological Texts in Critical Reading Instruction

  • Lee, Jong-Hee
    • English Language & Literature Teaching
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    • v.10 no.3
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    • pp.89-112
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    • 2004
  • This article examines the ways in which language can be exploited in the manipulation of the reader's interpretation of a text to make him/her take certain lines of thought according to the writer's persuasive intents. Such functions of language provide valid foundations to support the teaching of critical reading skills and to explore an adequate approach to discourse analysis. A pilot study was conducted to find out the extent to which the reader can be coaxed into thinking in some fashions guided by specific linguistic devices employed for ideological texts. Forty-seven subjects divided into two groups (humanities majors and natural science majors at undergraduate level) joined the two-fold questionnaire surveys intended to look at their critical reading abilities. The empirical results indicate that college students whose majors are humanities were more inclined to take a holistic approach in processing commercial advertisement texts and their abilities for critical interpretation appeared to be lower than those of the subjects whose majors are natural sciences, who showed a relatively high tendency to take an analytical approach in decoding the textual facts. As a consequence, pedagogic implications for increasing critical reading abilities have resulted in a set of analytical procedures concerning ideological texts which is linked with instructional guidelines to emphasize the importance of the reader's logical and analytical reasoning power, entirely accepted as a general prerequisite for cracking the covert language gambits.

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Fast Approach for Stereo Balancing Mapping Function

  • Kim, J.S.;Lee, S.K.;Kim, T.Y.;Lee, J.Y.;Choi, J.S.
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2009.01a
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    • pp.286-289
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    • 2009
  • This paper presents an effective approach to minimize recursive computations for balancing stereo pairs by using disparity vector errors and its directional histogram. A stereo balancing function is computed from the correspondent pixels between two images, and a simple approach is to find the matching blocks of two images. However, this procedure requires recursive operation, and its computation cost is very high. Therefore, in this paper, we propose an efficient balance method using structural similarity index and a partial re-searching scheme to reduce the computation cost considerably. For this purpose, we determine if re-searching for each block is necessary or not by using the errors and the directional histogram of disparity vectors. Experiment results show that the performance of the proposed approach can save the computations significantly with ignorable image quality degradation compared with full re-search approach.

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