• Acta Via Serica
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• 제3권2호
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• pp.1-22
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• 2018

The concept of the "Seidenstrassen" (Silk Road) was created by the German geographer F. von Richthofen (1833-1905) in 1877. The "Seidenstrassen" means communication between China and the Roman cultural area. To prove the route of dissemination of silk, Richthofen not only focused on geographical substantiality, based on the routes of the Chinese Zhang Qian and the Roman Ptolemy, but also on etymological, historical, and religious sources. In fact, his Silk Road concept has the trade of silk as well as the humanistic ideas of cultural exchange. It is worth noting that in his book China, Richthofen presented the Silk Road as a space-time concept that considers the length of space as well as the length of time by highlighting humanistic examples that came into modern times through the Sea Route. Later, the English term "Silk Road" appeared in 1938, the Japanese term "シルクロ-ド" (sirukurodo) in 1939, and the Korean term "실크로드" (silkrodeu) in 1952.

• 대한수학교육학회지:학교수학
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• 제3권2호
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• pp.373-399
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• 2001

The function is a basic and key concept to understand mathematical problems. However, many students have difficulties to expand the knowledge to other related concepts and to transfer the knowledge to real world problems. The reasons for the problem may be that the concept of function is taught by simplified and abstracted formula without fully understanding of the reasoning process. Also, the examples for the concepts are artificial and not related to students' experiences. Situated learning theory provides great implications to solve these problems. So, this study was designed to teach the concept of function more meaningful to students by appling situated learning theory. Thirty-eight middle school students were participated in this study. Students were provided the instruction designed according to the principles of situated learning theory. Then, they were asked to complete attitude survey questionnair and a performance assessment task. The result showed that the instruction based on situated learning theory was useful to Promote students' understanding and motivation for learning. More implications of the study was provided in the paper.

• 품질경영학회지
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• 제27권4호
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• pp.229-240
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• 1999

Drawbacks of using sigma level as a performance metric is reviewed. The concept of sigma level is introduced and methods of calculating sigma levels for various cases are illustrated with examples. Drawbacks of using sigma level as performance metric are also discussed with some suggestions for overcoming them.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 1994년도 추계학술대회 논문집
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• pp.64-73
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• 1994

An updated Lagrangian finite element analysis with automatic remeshing scheme is applied to the three-dimensional hot extrusion through landless square dies. In the remeshing procedure, it is very difficult that the meshes are generated automatically with consideration of physical characteristics. In the presented study, the mesh generation is accomplished by modular concept. The generated meshes by modular concept have advantages, especially for three-dimensional problems, such as economized computational time and consideration of physical characteristic. In the problem, orifice shapes of square die are divided into two for the extrusion of solid sections. The orifice adaptive modules are developed for each type and the numerical examples are carried out for each type.

• 품질경영학회지
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• 제21권2호
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• pp.121-130
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• 1993

In this paper, we relate the reliability of the system to the reliabilities of the components or subsystems. We discussed the basic concept of system reliability and present a method to determine probabilities of failure of coherent system components under various conditions, especially forcused on probability of component or subsystem failure before system failure. Several examples illustrate the procedure.

• 대한간호학회지
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• 제36권3호
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• pp.493-502
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• 2006

Purpose: Concept analysis is an essential part of theory development in nursing. Thus, many strategies or methods of concept analysis have been suggested in nursing literature. However, in Korea, only limited strategies were utilized, without much consideration on a wide range of strategies in choosing a method that coincides with the characteristics of each concept to analyze The purpose of this article was to propose various strategies for concept analysis. Method: A literature review method was used. Result: Ten methods of concept analysis were identified in the literature, and they were evaluated for advantages and limitations, In addition to the method by Walker and Avant and a hybrid model, more advanced strategies, such as triangulation method, critical analysis and the feminist approach were introduced and described in detail. The examples used in each concept analysis method were presented in table to provide the extent of utilization of each method. Conclusion: This article provides a wide range of strategies in identifying, clarifying, or elaborating a concept. It might help in choosing a method that best fits the concept to analyze, thus enhancing quality of concept analysis research.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 추계학술대회 논문집 학회본부
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• pp.71-74
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• 1996

The concept of uniformity in control implementation is exploded for improving efficiency of design procedure. A controller area operating system which includes real time kernel and control specific shell are developed. Three examples are discussed for the validation of tile system.

• East Asian mathematical journal
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• 제23권1호
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• pp.1-8
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• 2007

In this paper, we introduce the concept of strong and weak domination in fuzzy graphs, and provide some examples to explain various notions introduced. Also some properties discussed.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제34권4호
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• pp.215-221
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• 2023

Advancements in digital technology have led to increased usage of digital devices among teenagers. The coronavirus disease 2019 pandemic and the subsequent implementation of social distancing policies have further accelerated this change. Consequently, a new concept called the metaverse has emerged. The metaverse is a combination of a virtual reality universe that allows individuals to meet, socialize, work, play, entertain, and create. This review provides an overview of the concept and main features of the metaverse and examples of its utilization in the real world. It also explains the unique developmental characteristics of childhood and adolescence, as well as the possible negative influences of the metaverse on them, including addiction, antisocial behavior, cyberbullying, and identity confusion. This review summarizes several suggestions for future research because the metaverse is a relatively new concept.

• 한국수학교육학회지시리즈B:순수및응용수학
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• 제30권4호
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• pp.357-375
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• 2023

In this paper, we introduce the concept of bipolar soft supra topological space and provide a characterization of the related concepts of bipolar soft supra closure and bipolar soft supra interior. We also establish a connection between bipolar soft supra topology and bipolar soft topology. Additionally, we present the concept of bipolar soft supra continuous mapping and examine the concept of bipolar soft supra compact topological space. A related result concerning the image of the bipolar soft supra compact space is proved. Finally, we identify the concepts of disconnected (connected) and strongly disconnected (strongly connected) space and derive several results linking them together. Relationships among these concepts are clarified with the aid of examples.