• Journal of the Korean Professional Engineers Association
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• v.44 no.2
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• pp.34-38
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• 2011

Foot and mouth disease (FMD) is a highly contagions disease of cloven-hoofed animals and occurs in many non-European countries, in particular in huge parts of Asia including Turkey, in most countries of Africa and in parts of South America. The extreme contagiousness of the disease requires comprehensive to control an outbreak, causing high economic losses. The outbreak of FMD, which affects livestock including cattle, swine,sheep,goats,deer and other animals as a highly communicable disease that affects. The agency issued a statement noting that FMD disease does not spread to humans. The disease and meat from infected animals are news reports that more than 3.400.000 livestock have been ordered slaughtered so far across the country.

• Journal of Elementary Mathematics Education in Korea
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• v.19 no.2
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• pp.159-178
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• 2015

This study discusses on aims for affective development in national curriculum of mathematics. Firstly, affective characteristics of school mathematics studied in Korea are investigated. Secondly, aims for affective development in the Korean national curriculum of mathematics from the 1st curriculum to the current one are inspected. Thirdly, aims for affective development in national curriculum of Hong Kong, Singapore and Finland are researched. From the result, suggestions on the statement about aims for affective development are proposed.

• Journal for History of Mathematics
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• v.26 no.5_6
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• pp.401-416
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• 2013

There has been increasing interest in recent years in the pedagogical importance of counter-examples that focuses on pedagogical perspectives. But there is no research that undergraduate students' generating counter-examples and proposing the true statements. This study analyze 6 undergraduate students' response to interview tasks and the process of their generating counter-examples and proposing true statements. The results of interviews are that the more undergraduate students generate various counter-examples, the more valid they propose true statements. If undergraduate students have invalid understanding of logical implication and generate only one counter-example, they would not propose true statements that modify the given statement, preserving the antecedent. In pre-service teacher's education and school mathematics class, we need to develop materials and textbooks about counter-examples and false statements.

• Journal for History of Mathematics
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• v.29 no.6
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• pp.335-351
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• 2016

Spherical convexity may be defined in different ways. It depends on which statement we take as a definition among several statements that can be all used as a definition of convexity of subsets in an affine space. In this article, we consider this question from various perspectives. We compare several different definitions of spherical convexity which are found in mathematical papers. In particular, we focus our discussion on the definitions of J. P. $Benz{\acute{e}}cri$ and N. H. Kuiper who built a solid foundation for theory of convex bodies and convex affine(projective) structures on manifolds.

• Journal of Korean Library and Information Science Society
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• v.25
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• pp.475-500
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• 1996

The purpose of this study is to survey the development trends of school libraries in the western world namely U. S. A., Canada by analyzing such items as education and environment, staff, policy, standard and professional organization, and to find out how and why they were able to maintain efficient library services. The major findings are summarized as follows : (1) There are school district supervisor whose functions are to direct and supervise the school libraries in the district. (2) The school district supervisor, school administrator, Teacher and Teacher librarian all recognize the importance of its educational role and cooperate together for the development. (3) They gether statistical data on school library for continuous revision of statement, guideline and standard. (4) Not only the educational organization and the library organization but also the private foundation conduct systematic research and extend financial aid for the development of school library. (5) The Compulsory Codes and pertinent laws have been enacted to promote school library development.

• Wind and Structures
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• v.12 no.5
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• pp.401-412
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• 2009

A method is applied for the estimation of structural damage of tall slender structures using natural frequency and displacements measurements by GPS. The relationship between the variation in the global stiffness matrix (or in the stiffness of each finite element) and the change in the natural frequencies of the structure is given. In engineering practice the number of frequencies which can be derived by GPS measurement of long-period structures will be equal to one, two or three first natural frequencies. This allows us in initial studies to detect damage with frequency changes based on forward methods in which the measured frequencies are compared with the predicted analytical data. This idea, of health monitoring from possible changes to natural frequencies, or from a statement of excessive displacements is applied to the Stuttgart TV Tower.

• Bulletin of the Korean Space Science Society
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• 2008.10a
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• pp.37.4-38
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• 2008

Recently, statement of Intent for ILN has been signed by 9 countries including Korea, initiated March of this year by NASA which invited countries having lunar exploration plans. Concept of ILN is placing several core set of instrumentation on the Moon, in order to maximize scientific return to all of the participants. Network measurements from various nodes on lunar surface is essential for understanding internal structure of the Moon and environment around the Moon. Currently, Core Instrument Working Group is discussing the scientific interests and instrumentation among participated countries. Korea also is looking over various ways to participate ILN. We will introduce the progress and possible lunar science of ILN and will discuss the science mission objectives.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06d
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• pp.294-296
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• 2012

In cognitive radio ad hoc networks, secondary users need to exchange control information before data transmission. This task is not trivial in cognitive radio networks due to the dynamic nature of environment. This problem is sometime called rendezvous problem of cognitive radio network. The rendezvous problem is normally tackled by using two famous approaches: the use of common control channel (CCC) and using channel hopping (a.k.a sequence-based protocols). However, these two famous solutions form a vicious cycle while solving the rendezvous problem. The main purpose of this paper is to point out how and why this vicious cycle is formed.

• Journal of the Korean Society of Marine Environment & Safety
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• v.6 no.2
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• pp.57-66
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• 2000

The argument about enlarging or limiting the function of the Korea Maritime Police. Agency (KMPA) has been and will be repeated. In this paper, the author highlights the internal and external issues facing KMPA, stemming partly from deficiencies of its struggles for advancement of the organization and partly from shortcomings of political support far it. And he urges KMPA to change the organizational culture for maintaining its identity and characteristics as a lead maritime agency by practising a scientific management system for maximizing cost-effectiveness of its administrative resources. In addition, he also suggests that KMPA adopt the Total Quality Management System for quality improvements in services and greater efficiency in its organizational structure to meet the future competition in the changing political and legal environment. he concludes by providing a 6-point vision statement for KMPA from the standpoint of favoring enlarging the function of KMPA.

• Structural Engineering and Mechanics
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• v.25 no.2
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• pp.181-200
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• 2007

A decoupling technique for simulating near-field wave motions in two-phase media is introduced in this paper. First, an equivalent but direct weighted residual method is presented in this paper to solve boundary value problems more explicitly. We applied the Green's theorem for integration by parts on the equivalent integral statement of the field governing equations and then introduced the Neumann conditions directly. Using this method and considering the precision requirement in wave motion simulation, a lumped-mass FEM for two-phase media with clear physical concepts and convenient implementation is derived. Then, considering the innate attenuation character of the wave in two-phase media, an attenuation parameter is introduced into Liao's Multi-Transmitting Formula (MTF) to simulate the attenuating outgoing wave in two-phase media. At last, two numerical experiments are presented and the numerical results are compared with the analytical ones demonstrating that the lumped-mass FEM and the generalized MTF introduced in this paper have good precision.