• Journal of the Korean Geotechnical Society
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• v.22 no.9
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• pp.45-59
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• 2006

The successful performance of any numerical geotechnical simulation depends on the accuracy and efficiency of the numerical implementation of constitutive model used to simulate the stress-strain (constitutive) response of the soil. The corner stone of the numerical implementation of constitutive models is the numerical integration of the incremental form of soil-plasticity constitutive equations over a discrete sequence of time steps. In this paper a well known two-surface soil plasticity model is implemented using a generalized implicit return mapping algorithm to arbitrary convex yield surfaces referred to as the Closest-Point-Projection method (CPPM). The two-surface model describes the nonlinear behavior of coarse-grained materials by incorporating a bounding surface concept together with isotropic and kinematic hardening as well as fabric formulation to account for the effect of fabric formation on the unloading response. In the course of investigating the performance of the CPPM integration method, it is proven that the algorithm is an accurate, robust, and efficient integration technique useful in finite element contexts. It is also shown that the algorithm produces a consistent tangent operator $\frac{d\sigma}{d\varepsilon}$ during the iterative process with quadratic convergence rate of the global iteration process.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.18 no.1
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• pp.143-149
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• 1993

An approach is presented for efficient numerical integration of the Sormnerfeld type integrals pertinent to the microstrip surface Green's function arising in the problem of an electric current point source on an infinite planar grounded dielectric substrate. This approach, valid for both lossless and lossy dielectric substrates, is based on the deformation of the integration contour via a coordinate transformation and Cauchy's residue theory, and identifies clearly the effects of surface waves. I ts useful application is in a rigorous moment method analysis of micros trip antenna arrays and microstrip guided wave structures. The efficiency and the usefulness of the present approach are emphasized through some numerical calculations of the impedance matrix elements with associated CPU times.

• Structural Engineering and Mechanics
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• v.5 no.3
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• pp.283-295
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• 1997

This paper presents a high precision integration method for the dynamic response analysis of structures with holonomic constraints. A detail recursive scheme suitable for algebraic and differential equations (ADEs) which incorporates generalized forces is established. The matrix exponential involved in the scheme is calculated precisely using $2^N$ algorithm. The Taylor expansions of the nonlinear term concerned with state variables of the structure and the generalized constraint forces of the ADEs are derived and consequently, their particular integrals are obtained. The accuracy and effectiveness of the present method is demonstrated by two numerical examples, a plane truss with circular slot at its tip point and a slewing flexible cantilever beam which is currently interesting in optimal control of robot manipulators.

• Cross-Cultural Studies
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• v.23
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• pp.57-79
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• 2011

This article has analyzed the limite of integration and discrimination of Paraguayan inmigrants in Argentina. The most numerous collectivity is the Paraguayan inmigrants, with about 325,046 members that reside mainly in the Gran Buenos Aires in 2001. Paraguayan inmigrantes and their families usually undergo abuses by security forces and the over exploitation and the illegal work to a large extent work informally and for low wages. They also point out numerous problems of discrimination with respect to access to the services of public of health, education and housing. For the reason, Argentine government has established the program of Patria Grande in April 17, 2006. This program is that issue a permanent residence and DNI for Latin American immigrants from bordering countries. But the Argentine government does not maintain the program Patria Grande. Paraguayan inmigrants are still situated in the increase of the ilegal work and social insecurity.

• Journal of the Korean Society for information Management
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• v.14 no.1
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• pp.125-159
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• 1997

The purpose of the research was to investigate the organizational integration process of the university library, computer center and other informa ion related operations. The research process follows : first, the literature review of the organizational integration of the information related operations. second, analysis of the organizational integration in Korea. third, the organizational integration of information related operation in US and Japan, then the case analysis of information related organizational integrations in Korea. This process lead us to point out few problems and pitfalls that could occur in the integration procedure. The total integration procedure has turned out to be the most effective in the University environment. And for the management of fully integrated organization. Vice-President and Chief Information Officer, - who is reponsible to suggest vision, leadership and ability to cope with the complex nature of the future information society - was strongly suggested.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.26 no.8
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• pp.1631-1637
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• 2002

This paper presents a method for calculating contact force between bodies on plane. At each integration time step, the proposed method finds expected contact point on their outlines and then calculates penetration, velocity of penetration and contact force. This paper adopts continuous analysis method and multi-point contact method to calculate contact force. To obtain the accurate expected contact point on their outlines, a new algorithm is developed. The accuracy of the proposed algorithm is demonstrated by comparing the numerical results of the proposed method and DADS.

• 한국IT서비스학회:학술대회논문집
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• 2006.05a
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• pp.430-438
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• 2006

대부분의 기업은 다양한 환경의 IT자원과 Application들을 운영해 왔으며, Point to Point 수준의 인터페이스를 개발 또는 운영해오다, 몇 년 전부터 전사적인 인터페이스 표준으로서 EAI(Enterprise Application Integration)을 도입해 왔다. 그러나 EAI를 도입한 대부분의 기업은 EAI도입 당시 기대한 ROI(Return of Investment)의 효과를 보지 못해왔으며, EAI개발 및 유지보수를 위한 비용이 적절한지 한번쯤 고민해 왔을 것이다. 본고는 SK텔레콤 EAI를 약 4년 이상 개발 및 운영경험과 사례를 기준으로 효과적인 EAI개발 및 운영 생산성을 향상 방안을 제안하고자 한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.6
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• pp.1341-1346
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• 2015

Nowadays, many small businesses have experienced the failure of business or hardship. In this point, specific and integrated information for startup business should be required to decrease the rate of failure and to increase the rate of success. This study is to suggest the integration of various data which various public institutions have separately. For this purpose, it is to classify the data types in constructing big-data for start-up business and to suggest a way of data integration, analysis method, and web or services of information system for supporting startup businesses.

• Korean Institute of Interior Design Journal
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• v.13 no.4
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• pp.66-73
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• 2004

When we make a place for people, interior space and exterior space are always connected, each influencing the other. To create a better space or increase the quality of an existing space, it is essential to look at the relationship of inside and outside and their boundaries. Without consideration of the landscape, the building itself gives only limited satisfaction to people. This is an important issue for anyone who deals with space. This study intends to explain the important need for a change in attitude towards our built environment and its intrinsic relationship with its natural context. In the study, I try to find design concepts for integration of inside and outside which have accumulated since early Modernism designers and consider cases with different solutions and approaches that make total design sense when looking at the inside and outside as a whole, then, through observation of the cases, I find 5 design methods(Opening, Continuing, Insulting, Wrapping, Interpreting) in connecting the two spaces and analyze the solutions. The various examples which are shown in each patterns will help us to find ideas for the best solutions of integration of inside and outside. It is true that the idea of integration of inside and outside will increase the quality of our environment and it comes with the current thoughts of ecological and sustainable design. Thereby, I suggest designers to change their manner to continuous and integrated point of view in dealing with built environment.

• Transactions of the Korean Society of Mechanical Engineers
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• v.18 no.10
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• pp.2640-2652
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• 1994

The stiffness of 6-node isotropic element is stiffer than that of 8-node isotropic element of same configuration. This phenomenon was called 'Relative Stiffness Stiffening Phenomenon'. In this paper, an equation of sampling point modification which correct this phenomenon was derived for the composite plate, as well as an equation for an isotropic plate. The relative stiffness stiffening phenomena of an isotropic plate element could be corrected by modifying Gauss sampling points in the numerical integration of stiffness matrix. This technique could also be successfully applied to the static analyses of composite plate modeled by the 3-dimensional 16-node elements. We predicted theoretical errors of stiffness versus the number of layers that result from the reduction of numerical integration order. These errors coincide very well with the actual errors of stiffness. Therefore, we can choose full integration of reduced integration based upon the permissible error criterion and the number of layers by using the thoretically predicted error.