• 대한가정학회지
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• 제41권11호
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• pp.11-20
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• 2003

The purpose of this study is : first, to examine factors of fashion show planning and production and to classify types of fashion show planning and production: second, to compare and analyze the factors through a case analysis to defined their differences. For the purpose, data are collected to compare and analyze from literature as well as the interview with fashion show planning and production companies in Korea. The result shows that all the factors are considered on a practical level except security and publicity among 15 factors presented in literature : the purpose of the show, target spectators, product selection, product prices, type of show, size, location, models, time of show, duration, theme, security, budget, and publicity. Show types are divided into national brands, designer brands, imported brands, and collections. The result of the comparison and analysis of the factors of the planning and production by type shows that factors vary greatly depending on the purpose of the show, target spectators, and form of the show and products. By analyzing the case study on fashion show planning and production on a practical level, the study recognizing the need of specialized development of fashion show planning in Korea's fashion industry, is a basic process of theory systematization for the planning and production in its marketing aspects, and will provide relevant theories in such aspects for those who want to enter into the field.

• 대한한의학방제학회지
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• 제12권1호
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• pp.225-246
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• 2004

Objectives: This study has been done to compare the Talcum's composition before and after using processing method and to clarify its quality and naming through the historical herbal books. Methods: I studied the Talcum and processed Talcum by physical and chemical method which contain microscopic analysis, X-ray diffraction analysis, thermal analysis, XRF, ICP, etc, to compare the compositions and its characters. Results: Talcum is a magnesium hydroxidfe(($Mg_3[Si_4O_{10}][OH]_2$)). Talcum contains a main ingredients of MgO 29.03-30.40%(31.70%), $SiO_2$ $62.00{\sim}62.40%(63.50%)$, $H_2O$ $4.40{\sim}4.85%(4.80%)$ and small ingredients, also. Conclusion: A radio-element contents of U, Th contain less than average contents of the lithosphere's U 1.8ppm, Th 7.2ppm. There are two sorts of Talcum which are a northern Talcum(solid Talcu) and southern Talcum(soft Talcum). A northern natural products of Talcum(solid Talcum) are used mostly in korea and china.

• 한국정보통신학회논문지
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• 제19권8호
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• pp.1811-1817
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• 2015

본 논문은 국내에서 수행된 정보보안에 연구 트렌드를 분석하고, 국제적 연구 트렌드와 비교함으로써 향후 국가차원에서 나아가야할 방향에 대해 고찰해보고자 한다. 이는 기존에 수행된 정보보안의 국제 연구 트렌드 분석에 대한 후속작으로, 기존 연구의 결과와 정확한 비교를 위해 동일한 분석 방법을 이용한다. 이를 위해 2001년부터 2014년까지 발표 및 게재된 국내 논문을 활용하며, 보안과 깊이 관련된 기술들 사이의 시간별 연관성을 측정하여 국내 연구 트렌드를 분석하고, 그 결과를 비교한다. 또한 국내외의 미래 기술 시장을 함께 고려함으로써 향후 우리가 나아가야 할 발향을 살펴보고자 한다.

• 대한치과보철학회지
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• 제38권6호
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• pp.765-781
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• 2000

The purpose of this study was to compare the screw loosening characteristics of three avail-able cementation type abutments: one-piece cementation type abutment; two-piece cementation type abutment using titanium abutment screw; two-piece cementation type abutment using gold abutment screw. Two implant supported three-unit superstructures were fabricated using a pair of 3 kinds of abutments for each experimental model. Cyclic loading was applied on the specimen, and made to stop when the superstructure showed movement over threshold range. The loaded cycle was counted until the machine stopped. Frequency analysis was done to measure the change of natural frequency before and after the application of cyclic load and to find the effect of screw loosening on the change of natural frequency. The specimen assembly was modeled to perform the finite element analysis to see the distribution of the stress induced by the application of preload over the screw joint and to compare the pattern of the distribution of stress induced by the external force with the change of the preload condition. The following results were obtained: 1. The failure loading cycle of two-piece cementation type abutment using gold screw was significantly greater than those of the other groups. 2. One-piece cementation type abutment applied to multi-unit restoration case did not show greater resistance to screw loosening compared to two-piece cementation type abutments. 3. Frequency analysis showed decrease in natural frequency when screw loosening occured.

• 물과 미래
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• 제23권1호
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• pp.99-107
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• 1990

수자원 개발계획 및 목공구조물의 합리적 설계를 위해서는 과거의 수문관측자료에 의거한 해석이 필요하며, 일반적인 수문현상은 무작위적인 인자가 포함되기 때문에 이를 고려한 통계적 기법, 즉 추계학적 해석기법이 필요하다고 하겠다. 본 연구에서는 남한강 상류의 동일유역 4개 지점(단양, 정선, 영월, 평창)의 월유량 자료를 일변량 AR(1), AR(2)모형과 다변량 AR(1), AR(2)모형에 적용하여 각 모형의 통계적 특성치를 분석하고, 월유량을 모의발생시켜, 일변량 모형과 다변량 모형을 비교하였다. 각각의 모형에 의한 모의발생 계열의 비교, 분석을 통하여 볼 때, 단일지점만을 고려하는 일변량 모형에 비해 지점간의 공선형성을 고려하는 다변량 모형이 동일유역의 월유량 해석에 있어서 더 적합함을 알 수 있었다.

• Communications for Statistical Applications and Methods
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• 제29권5호
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• pp.591-601
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• 2022

In gene set analysis with microarray expression data, a group of genes such as a gene regulatory pathway and a signaling pathway is often tested if there exists either differentially expressed (DE) or differentially co-expressed (DC) genes between two biological conditions. Recently, a statistical test based on covariance estimation have been proposed in order to identify DC genes. In particular, covariance regularization by hard thresholding indeed improved the power of the test when the proportion of DC genes within a biological pathway is relatively small. In this article, we compare covariance thresholding methods using four different regularization penalties such as lasso, hard, smoothly clipped absolute deviation (SCAD), and minimax concave plus (MCP) penalties. In our extensive simulation studies, we found that both SCAD and MCP thresholding methods can outperform the hard thresholding method when the proportion of DC genes is extremely small and the number of genes in a biological pathway is much greater than a sample size. We also applied four thresholding methods to 3 different microarray gene expression data sets related with mutant p53 transcriptional activity, and epithelium and stroma breast cancer to compare genetic pathways identified by each method.

• East Asian mathematical journal
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• 제38권2호
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• pp.187-214
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• 2022

This study compares the functions of the Learning Management Systems (LMS) in three widely used Edu-Tech platforms, that support students' individualized learning by using the learning characteristics of the students. The rapid advances in artificial intelligence (AI) are broadening their impacts in the education industry, and play a broad role in supporting student learning. In many countries, online classes have become a norm due to the COVID-19 crisis, and the demand for Edu-Tech in classes has increased rapidly. As a result, many countries, including South Korea, are now preparing and implementing various policy measures to adopt Edu-Tech in the class setting. Therefore, in this study, we analyze and compare the structures and characteristics of the three widely used Edu-Tech platforms that support individualized mathematics learning. In particular, we compare the LMSs of the three platforms by considering the elements such as learning design, learning management, learner analysis, learning result analysis, and student management functions. The results of this study give implications in the future directions to take on how to build Edu-Tech platform models that promote students' individualized mathematics learning in public education.

• 무역학회지
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• 제46권1호
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• pp.191-210
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• 2021

This study is following the study of "A Meta Analysis on International Trade Transportation and Logistics" published in Korea Trade Review(KTR) in 2014 and adding additional analysis for articles published in journals of international trade transportation and logistics. Studying issues of KTR are moving from transportation to logistics after 2014 and it is similar with the other international journals. The ratio of the thems of 'Economic, Policy, Regional, Technical, General Enterprise Management' in KTR is 36%, while 57.36% of IJLM and 61.88% of JBL. Main theme in the field of international transportation and logistics is Supply Chain Management(SCM). After the former study, in the viewpoint of research methods, quantitative researches are increased while their portion is still low compare to International Journal of Logistics Management(IJLM) and Journal of Business Logistics (JBL). Especially econometric research method is highly adopted in the international journals compare to KTR. Number of authors of KTR is less than IJLM and JBL, because the collaboration between researchers is needed when they publish articles in the international journals like IJLM and JBL.

• 대한기계학회논문집A
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• 제39권10호
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• pp.1039-1044
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• 2015

차량의 개발단계에서 내구성 평가는 많은 시간과 비용이 소요된다. 최근 완성차 업체들은 자사만의 내구성 평가방법을 개발하고 수정 보완하는데 많은 노력을 기울이고 있다. 본 연구는 토션빔 액슬의 내구성 평가를 위한 통합 CAE 기법을 개발함에 있어 세계적인 자동차 업체의 정형화된 CAE 기법과의 비교를 통해 경제성을 평가하고 실험적 방법을 통해 얻은 데이터와의 비교를 통해 신뢰성을 확보하는 것을 목표로 하였다. 이를 위해 현재까지 널리 사용되어 온 준정적 내구해석의 과정 및 결과에서 보완점과 문제점을 분석하였고, 업계의 요구사항을 면밀히 검토하여 정규모드해석을 통해 다물체 동역학 모델을 구성하고 이를 이용한 동역학 해석을 진행한 후 그 결과를 이용하여 내구해석인 공진 내구해석 기법을 제안하였다.

• Journal of Information Science Theory and Practice
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• 제1권2호
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• pp.16-35
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• 2013

Relevance has a long history of scholarly investigation and discussion in information science. One of its notable concepts is that of 'user-based' relevance. The purpose of this study is to examine how users construct their perspective on the concept of relevance; to analyze what the constituent elements (facets) of relevance are, in terms of core-periphery status; and to compare the difference of constructions of two groups of users (information users vs. information professionals) as applied with a social representations theory perspective. Data were collected from 244 information users and 123 information professionals through use of a free word association method. Three methods were employed to analyze data: (1) content analysis was used to elicit 26 categories (facets) of the concept of relevance; (2) structural analysis of social representations was used to determine the core-periphery status of those facets in terms of coreness, sum of similarity, and weighted frequency; and, (3) maximum tree analysis was used to present and compare the differences between the two groups. Elicited categories in this study overlap with the ones from previous relevance studies, while the findings of a core-periphery analysis show that Topicality, User-needs, Reliability/Credibility, and Importance are configured as core concepts for the information user group, while Topicality, User-needs, Reliability/Credibility, and Currency are core concepts for the information professional group. Differences between the social representations of relevance revealed that Topicality was similar to User-needs and to Importance. Author is closely related to Title while Reliability/Credibility is linked with Currency. Easiness/Clarity is similar to Accuracy. Overall, information users and professionals function with a similar social collective of shared meanings for the concept of relevance. The overall findings identify the core and periphery concepts of relevance and their relationships in terms of coreness, similarity, and weighted frequency.