• Journal of the Korean Society for information Management
• /
• v.28 no.4
• /
• pp.33-48
• /
• 2011

This study investigated and analyzed various library classification systems and related literature in order to suggest some modifications and expansion of the Dewey Decimal Classification, the 23rd edition (DDC 23) in the area of immigration policy - an interdisciplinary subject - for the best information organization and services. First of all, definitions and scopes of the immigration policy were dealt with and then primary subject areas of it were selected. And then, DDC, Library of Congress Classification, Korean Decimal Classification, and Universal Decimal Classification were compared and analyzed according to the structures, headings and characteristics. Finally, modified classification schedules in immigration policy of the DDC 23 - the most frequently used one with an regular revision was proposed with their principles and main schedules with an auxiliary table. It can be used for an effective information organization in immigration policy area and it will be useful for many libraries and research institutes on immigration policy.

• Journal of Korean Library and Information Science Society
• /
• v.44 no.2
• /
• pp.399-422
• /
• 2013

This study suggests some ideas for improvement of mixing classification and illogical subdivisions arrangement of Statistics in Social Science and Mathematical Statistics in Natural Science on KDC. We investigate the characteristics, educational system, and curriculum of Statistics in Korea. Besides, we compare and analyze classification systems such as KDC, DDC, LCC, NDC and Research Fields Code by National Research Foundation of Korea. As a result, Statistics in Social Science is relocated and integrated with the subfield of Natural Science according to the academic background. Existing social statistics topics are subdivided into statistical research methods complementing social science research methods. The heading 'Probabilities, Statistical mathematics' in Natural Science is changed to 'Statistics', and the subdivisions are expanded and revised.

• Proceedings of the Korean Society for Information Management Conference
• /
• 2006.08a
• /
• pp.135-142
• /
• 2006

인용을 통한 연구성과 지표인 h-지수는 2005년에 제안된 이후 공식의 간단명료함, 용이한 산출 방법, 지수의 강건성 등이 인정되면서 계량정보학 분야를 비롯한 학술 공동체의 활발한 후속 논의가 이례적으로 신속하게 이어지고 있다. 후속 연구는 주로 h-지수의 타당성 검토, h-지수를 이용한 특정 분야의 개인성과 측정 시도, h-지수의 타 영역에의 응용, h-지수의 보완 등을 주제로 전개되고 있다. 이 연구에서는 우선 h-지수와 이를 보완한 g-지수를 비롯한 변형 지수에 대해서 현재까지 전개되고 있는 논의를 살펴보았다. 그리고 인용빈도가 높지 않은 경우를 고려하여 개선한 지수를 제안하고 실험적인 측정을 시도하였다.

• Journal of Families and Better Life
• /
• v.12 no.1
• /
• pp.181-199
• /
• 1994

이연구의 목적은 공공가정이 사적이 개별가정과 마찬가지로 가정관리학의 주된 연 구의 대상으로 인식되어야 한다는 것을 소개하고 가정관리학에 있어서 공공가정론이 갖는 의미와 그 전개의 방향성에 대하여 모색하는데 있다. 또한 공공가정론 연구의 도입과 적용 을 통하여 공공가정을 관리하는 전문가를 양성함으로써, 가정관리학과 연구영역이 확대되고 취업에의 가능성이 증대도며 동시에 변화하는 사회적 요구를 충족시킬수 있다는 면에서 공공가정론의 중요성을 제시하고자 한다.

• Journal of Digital Contents Society
• /
• v.9 no.1
• /
• pp.87-99
• /
• 2008

High Altitude Platform network systems utilize Unmanned Aerial Vehicle as routers for ground node communication. For this purpose, geographical clustering of ground nodes must be required. In this paper, we assume mobile ground nodes over wide area and the clusters composed of ground nodes are identified. UAVs can be positioned at the point of centroid of clusters. The number of UAVs are derived from the area size and the number of ground nodes deployed in that area. From the simulation and application of clustering algorithms, we showed visual clustering results with dynamic variance of number of ground nodes.

• Journal for History of Mathematics
• /
• v.25 no.1
• /
• pp.29-43
• /
• 2012

In this paper, we survey the history of search for axiomatic set theory and show that ${\exists}U(0{\in}U{\wedge}{\forall}x(x{\in}U{\leftrightarrow}{\exists}z(z{\in}U{\wedge}{\forall}y(y{\in}x{\rightarrow}y{\subseteq}z))){\rightarrow}$ ZR.

• Computational Structural Engineering
• /
• v.10 no.3
• /
• pp.241-250
• /
• 1997

The strain localization of concrete is a phenomenon such that the deformation of concrete is localized in finite region along with softening behavior. The objective of this paper is to develop a plasticity and damage algorithm for the finite element analysis of the strain-localization in concrete. In this paper, concrete member under strain localization is modeled with localized zone and non-localized zone. For modeling of the localized zone in concrete under strain localization, a general Drucker-Prager failure criterion by which the nonlinear strain softening behavior of concrete after peak-stress can be considered is introduced in a thermodynamic formulation of the classical plasticity model. The return-mapping algorithm is used for the integration of the elasto-plastic rate equation and the consistent tangent modulus is also derived. For the modeling of non-localized zone in concrete under strain localization, a consistent nonlinear elastic-damage algorithm is developed by modifying the free energy in thermodynamics. Using finite element program implemented with the developed algorithm, strain localization behaviors for concrete specimens under compression are simulated.

• Transactions of the Korean Society of Mechanical Engineers B
• /
• v.34 no.9
• /
• pp.859-866
• /
• 2010

Nonlinear dynamics of pulsating instability-diffusional-thermal instability with Lewis numbers sufficiently higher than unity-in counterflow diffusion flames, is numerically investigated by imposing a Damkohler number perturbation. The flame evolution exhibits three types of nonlinear behaviors, namely, decaying pulsating behavior, diverging behavior (which leads to extinction), and stable limit-cycle behavior. The stable limit-cycle behavior is observed in counterflow diffusion flames, but not in diffusion flames with a stagnant mixing layer. The critical value of the perturbed Damkohler number, which indicates the region where the three different flame behaviors can be observed, is obtained. A stable simple limit cycle, in which two supercritical Hopf bifurcations exist, is found in a narrow range of Damkohler numbers. As the flame temperature is increased, the stable simple limit cycle disappears and an unstable limit cycle corresponding to subcritical Hopf bifurcation appears. The period-doubling bifurcation is found to occur in a certain range of Damkohler numbers and temperatures, which leads to extend the lower boundary of supercritical Hopf bifurcation.

• School Mathematics
• /
• v.18 no.1
• /
• pp.143-157
• /
• 2016

North Korea had been reorganized its educational curriculum and new contexts were authored in 2013. In this study, mathematics contexts of North Korean secondary school's first grade in 2009 and 2013 were investigated. And the changes of content structure, content development, and content composition were analyzed. Results were as follows: First, with respect to the content structure, 1 chapter decreased, while lesson number was intact and 4 subunits increased. Second, with respect to the content development, considerable changes were presented. The tendencies that encouraged student and pursued a student friendly form were investigated. Third, with respect to the content composition, obvious changes were presented. It was investigated that the ratio of numbers and number operations, letters and expressions decreased nearly half. And new contents were supplemented in the areas of patterns, geometry, functions, probability and statics, equation of figures, set and statement. This changes suggests that differences between contexts of South and North Korea is narrowing compared to the past. In conclusion, the direction of North Korean mathematical education is changing for the general direction of South Korean mathematical education.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
• /
• v.12 no.7
• /
• pp.1110-1114
• /
• 2001

The discrete wavelet concept in the k-domain is applied to efficiently represent Green function of integral equations. Application of discrete wavelet concept to Green function in the k-domain can be implemented equivalently by using spatial domain variable-sized windows. The proposed method consists of constant Q-filtering, changing the center of coordinates, and transforming spatially filtered Green functions into those in the k-domain. A mathematical expression of Green function based on the discrete wavelet concept is derived and its characteristics are discussed.