• Smart Structures and Systems
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• 제17권6호
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• pp.957-980
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• 2016

Structural damage detection (SDD) is a challenging task in the field of structural health monitoring (SHM). As an exploring attempt to the SDD problem, a hybrid self-adaptive Firefly-Nelder-Mead (SA-FNM) algorithm is proposed for the SDD problem in this study. First of all, the basic principle of firefly algorithm (FA) is introduced. The Nelder-Mead (NM) algorithm is incorporated into FA for improving the local searching ability. A new strategy for exchanging the information in the firefly group is introduced into the SA-FNM for reducing the computation cost. A random walk strategy for the best firefly and a self-adaptive control strategy of three key parameters, such as light absorption, randomization parameter and critical distance, are proposed for preferably balancing the exploitation and exploration ability of the SA-FNM. The computing performance of the SA-FNM is evaluated and compared with the basic FA by three benchmark functions. Secondly, the SDD problem is mathematically converted into a constrained optimization problem, which is then hopefully solved by the SA-FNM algorithm. A multi-step method is proposed for finding the minimum fitness with a big probability. In order to assess the accuracy and the feasibility of the proposed method, a two-storey rigid frame structure without considering the finite element model (FEM) error and a steel beam with considering the model error are taken examples for numerical simulations. Finally, a series of experimental studies on damage detection of a steel beam with four damage patterns are performed in laboratory. The illustrated results show that the proposed method can accurately identify the structural damage. Some valuable conclusions are made and related issues are discussed as well.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제20권1호
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• pp.117-145
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• 2006

수학 영재들은 타고난 수학적 소질과 적성, 지적인 능력과 창의성을 바탕으로 참신한 과제에 대한 도전적이고 창조적인 호기심을 가지고 있다. 영재아들의 창의적인 사고력을 길러주기 위해서는 다양한 방법으로 문제 해결에 접근하게 하고 전략적 시도를 할 수 있도록 만들어주어야 한다. 이런 관점에서 볼 때 개방적이고 비정형적인 문제를 영재 교육프로그램의 과제로 선정하는 것은 바람직하다 할 수 있다. 본 논문에서는 다양한 유형의 개방형 문제를 구안하고, 이를 토대로 영재 학급에서 학습 활동을 전개한 후, 문제해결 과정에서 영재아들의 수학적 사고 능력의 특성과 문제 해결 전략 사례를 분석하여, 개방형 과제를 활용한 초등학교 영재 수업에 관한 시사점을 얻고자 하였다.

• 환경정책연구
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• 제2권2호
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• pp.17-40
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• 2003

The objective of this paper is to formulate strategies and action programs for developing sustainable agriculture in Korea. There is increasing evidence that agriculture has been preoccupied with increasing productivity much to the detriment of environmental degradation. The issue of increasing agricultural productivity so as not to undermine the environment is a difficult task. In reality, there are many definitions of sustainable agriculture and sustainable agricultural development. In this paper, sustainable agriculture is defined by its ability to ensure future supplies of agricultural products at acceptable economic and environmental costs to the society. Sustainable agriculture development refers to the optimal level of interaction among the three dimensions - the environmental, the economic and the social - through dynamic and adaptive processes of trade-off. In order to formulate the strategies for developing sustainable agriculture, three stage approaches such as strategic analysis, strategic choice, and strategic implementation are employed. The basic framework for strategies of sustainable agriculture development consists of five steps such as vision, targets, principles, action plan and policy instruments. The major action plans for activating formulated strategies are suggested as integrating agricultural and environmental policy measures, establishing the system of optimal agri-environmental resources management practices, establishing safe and high quality product system and its effective marketing system, increasing the R&D investment for developing sustainable agro-technology, developing indicators for measuring sustainable agricultural development, and taking a share in related roles for all parties including farmers, consumers, policy makers, researchers and NGOs.

• 대한수학교육학회지:학교수학
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• 제3권2호
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• pp.295-324
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• 2001

Until now, There have been few studies to investigate a degree of abilities or interesting about mathematical problem-posing of first and second grades in elementary school. This is due to the fact that this students(1st and 2nd grades) have a limited amount of study time and their minds are not fully developed, and are lacking in their representation of ability to use the national language. This being the case, it is difficult to investigate their Mathematical problem-posing in a practical manner. However, our 7th elementary school Mathematics curriculum emphasizes the teaching and learning of Mathematical problem-posing from a basic level of first and second grade with emphasis on activity in teaming Mathematics. Through this study, having analysed the problems those children posed, I have found out they improved in numbers and correctness of their posed problems. And I too could found out showing to their much interesting and confidence to mathematical problem-posing and could confirmed for the children to admit themselves its merits through analyzing some questions to ask their opinions to it. I expect that this study can help to develop the teaching and learning materials for mathematical problem-posing and also to improve its methods of elementary school mathematics. The next study task is, I think, that it is necessary to accumulate the studies to investigate and analyse the practical learning activities of children for problem-posing contents of mathematics text books.

• 한국언어정보학회지:언어와정보
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• 제9권2호
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• pp.127-139
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• 2005

In this paper I investigate whether Korean-speaking children know the basic meaning of reciprocal anaphors like each other. I further examine whether they have knowledge of subtle differences in the interpretations of such anaphors depending on the two types of verbs. Fiengo and Lasnik (1973) pointed out a contrast between reciprocal sentences with active verbs and stative verbs. For example, a sentence with an active verb like The men in the room are hitting each other, has both a strong reciprocal reading (i.e., everyone of them in the room is hitting every other one) and a weak reciprocal reading (i.e., certain pairs of men are not engaged in the action of hitting each other). In contrast, a sentence with a stative verb like The men in the room know each other allows only a strong reciprocal reading (i.e., everyone of them know every other one). 16 Korean children and 15 Korean adults were tested using the Truth Value Judgment Task methodology. The results of the present study show that like English children, Korean children know the meaning of reciprocal anaphor, and that they also know the semantic difference of reciprocal sentences with active and stative verbs. Therefore, the present study strongly supports the claim that the semantic distinction of reciprocal sentences with active and stative verbs may be universal, and that children's ability of this semantic distinction might be innately given.

• Structural Engineering and Mechanics
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• 제23권5호
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• pp.455-468
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• 2006

Smart structural systems are defined as ones that demonstrate the ability to modify their characteristics and/or properties in order to respond favorably to unexpected severe loading conditions. The performance of such a task requires a set of additional components to be integrated within such systems. These components belong to three major categories, sensors, processors and actuators. It is wellknown that all structural systems entail some level of uncertainty, because of their extremely complex nature, lack of complete information, simplifications and modeling. Similarly, sensors, processors and actuators are expected to reflect a similar uncertain behavior. As it is imperative to be able to evaluate the impact of such components on the behavior of the system, it is as important to ensure, or at least evaluate, the reliability of such components. In this paper, a system model for reliability assessment of smart structural systems is outlined. The presented model is considered a necessary first step in the development of a reliability assessment algorithm for smart structural systems. The system model outlines the basic components of the system, in addition to, performance functions and inter-relations among individual components. A fault tree model is developed in order to aggregate the individual underlying component reliabilities into an overall system reliability measure. Identification of appropriate limit states for all underlying components are beyond the scope of this paper. However, it is the objective of this paper to set up the necessary framework for identifying such limit states. A sample model for a three-story single bay smart rigid frame, is developed in order to demonstrate the proposed framework.

• 한국국방경영분석학회지
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• 제28권1호
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• pp.17-28
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• 2002

Recently, To define an enterprise's survival strategy is a difficult task, because the competition of a business is a complexity. The reason is the original research uses a statistical survey method. On a conceptual point of SCM, - as an order of development, physical distribution, logistics management, basic supply chain management and advanced supply chain management etc - a supervisor is magnifying gradually as well as confusing with information and analysis techniques which seems possible. On executing this, however, it has many problems since it is hard and wide; therefore, The Manager don't aware a total executable solution even though the enterprise knows necessity of SCM. On this paper focus on a proposal of alternatives with reasonableness of manufacturing and making a profit of sales department like most of enterprises are willing to overcome such as carelessness and unready strategy of investment additionally, the thesis should effort to find an element through an analysis of cases, a statistical method of effective SCM, and actual survey to propose an alternative; moreover, this paper proved the facts that it could be a guiding company, which has an ability of cooperation with entities through the founding of supply chain. As a conclusion, this essay showed the variation that influences the capacity entities and alternative to define an element which basically influence for a cause and effect.

• 한국산학기술학회논문지
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• 제17권5호
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• pp.186-194
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• 2016

본 연구는 노인복지관 체육프로그램 참여 노인들에게 많은 영향을 미치는 지도자에 대한 참여자의 감정반응이 성취목표와 수행능력에 어떠한 영향을 미치는지를 알아보고 노인지도자들의 자질과 능력을 전문적으로 발전시킬 수 있는 효과적인 자료를 제공할 뿐만 아니라 노인담당기관의 효율적인 운영에 도움을 줄 수 있는 기초적인 자료를 제공하는데 의의가 있다. 이에 따라 다음과 같은 결론을 얻을 수 있었다. 첫째, 감정반응의 대인관계, 성취감은 성취목표성향의 과제지향, 자아지향에 영향을 미친다. 둘째, 감정반응의 대인관계, 성취감은 수행능력의 집중, 자신감에 영향을 미친다. 셋째, 성취목표성향의 과제지향, 자아지향은 수행능력의 집중, 자신감에 영향을 미친다. 따라서 지도자에 대한 참여자의 감정반응은 성취목표성향과 수행능력에 영향을 미친다는 것을 알 수 있으며, 노인지도자들은 참여자들에게 신체활동에 대한 이론적 실기적 능력 배양에 도움을 줄 뿐만 아니라 참여 노인들과 지도자간에 긴밀하면서도 상황적 측면을 고려한 실질적인 지도가 필요하다. 그리고 노인들의 지속적인 스포츠 활동 참여를 위해서 노인들 스스로 신체적 정신적으로 항상 준비되어 있어야 하고, 참여 중에는 경기결과에 집착하기 보다 타인을 배려하고 자신의 기준을 달성하는데 관심을 갖는 것이 중요하다. 지도자들은 노인들의 참여종목에 대한 확고한 목표를 설정함과 동시에 이를 위한 노력과 자기계발 및 전반적인 삶의 질 향상에 이바지 할 수 있도록 도움을 주어야할 것으로 사료된다.

• 기록학연구
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• 제2호
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• pp.3-48
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• 2000

The collection and transfer of records is a very basic stage in the whole process of records and archives management. However they are regarded as an non-professional art of work in records management that are performed easily by everyone. Therefore they have been treated not properly in the scholarly discussion of archival sciences in Korea. The collection and transfer of records play an active role in the making of effective administrative system, in accumulating and sharing the knowledge and informations of political, economical, social and cultural values. On the basis of proper collection and transfer of records our democracy can operate regularly and our daily experiences can be preserved as historical resources. For the optimal-functioned collection and transfer of public records the archivists for this task must have a comprehensive understanding of whole process of records management and possess suitable professional skills. Moreover there are many sorts of preliminary works needed for this task, as follows: an accurate defining of administrative organizations and their tasks, thorough understanding of records management institutions on their own competence and ability, and the establishment of technical standards for their tasks. Additionally the archivists are able not only to consider the present informational and evidential values of the records, but also the historical values. It can be said that the collection and transfer of records is a "synthesis of records management skills" exerted by an archivist. According to the newly established law of public records management, the collection and transfer of public records must be registered at first electronically. Through this procedure the whole contents of produced and transmitted records, which are to be transferred, can be reported in detail. By means of this report the archival institutions and the archivists can trace back the each items of records(archives) and the result of their arrangement to identify a certain object. There are also new storage strategies employed to increase the whole sum of stored informations, i. e. records and archives, in spite of reducing the storage costs. It will be achieved by differentiations of the preservation methods for each sorts of records by the criteria of storage-period, -place, and -method. Many supplementary methods are also prepared to help the collection of important records(archives) in a complete structure and form. To let this new concept and system of collection and transfer of records operate properly, a number of professional archivists should be posted in the needed places throughout the whole administrative body. Their training must be also updated for the newly defined task of collection and transfer of records.

• 한국산학기술학회논문지
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• 제19권4호
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• pp.293-300
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• 2018

본 연구는 간호대학생의 직무 유형을 통해서 경력개발을 위한 교육요구는 무엇인지 알아보기 위한 목적으로 실행하였다. 연구목적의 달성을 위하여 먼저 부산 경남 지역에 있는 K 대학과 P 대학의 간호대학생 146명을 대상으로 커리어앵커 질문지를 이용하여 직무 유형을 분석하였다. 그리고 직무 유형 중에서 상위 유형의 경향성을 보이는 간호대학생 28명을 선별하여 4개의 팀으로 나누어 맵을 작성하였고, 작성된 맵의 내용을 기반으로 초점집단인터뷰를 했다. 이는 간호대학생의 실제적 목소리를 통해 경력개발을 위한 교육요구에 대해서 알아보기 위해서이다. 그 결과 첫째, 간호대학생의 커리어앵커 유형은 라이프스타일과 안전 보장이 가장 높게 나타났고, 가장 낮은 커리어앵커 유형은 순수한 도전과 관리적 역량이었다. 둘째, 경력개발을 위한 교육요구는 크게 4개의 영역, 전공역량, 실무역량, 인성역량, 자원관리역량으로 범주화하였다. 전공역량은 간호 전문지식 및 기술, 실무역량은 병동 업무처리, 의사소통, 위기대처능력, 인성역량은 협력, 책임인식, 자원관리역량은 시간 관리 능력, 스트레스 관리능력이다. 본 연구의 결과는 향후 간호대학생의 경력개발을 위한 교육적 기초자료로 활용할 수 있다는 점에서 의의가 있다. 아울러 간호실무 개선을 위한 교육과정개발에 적용할 수 있을 것으로 기대한다.