• Journal of the Korean housing association
• /
• v.21 no.1
• /
• pp.171-180
• /
• 2010

Amongst society's transitional presuppositions towards the future, population aging is the most critical issue in Korea. Immediate attention to devise a countermove is required. One of the major trends appeared in retirement communities of advanced countries is social integration which has been considered as a promising future direction of elderly housing development. This study aims to find out social integration characteristics and to categorize local engagement types of recent retirement communities through the characteristics of sharing common facilities and programs. Data were collected through mainly web site and literature reviews. Contentent analysis technique was used. Ten CCRC cases were selected through web search using the major key words such as 'intergenerational'. As a result, community engagement types were classified into six categories by the degree of sharing both physical and program resources between the retirement community and local area. This type can be utilized to develop alternative housing and retirement community for the older adults as a new model which activates the resident and vitalizes the retirement community through local engagement by physical and social resources.

• Proceedings of the Computational Structural Engineering Institute Conference
• /
• 1993.04a
• /
• pp.37-44
• /
• 1993

There are a lot of linear dynamic analysis methods for complex structures. Each method has advantages and shortcomings. Method of dynamic analysis for complex structure is selected considering characteristics of dynamic loading, computer facility available number of degree of freedem and accuracy of results. It is a main point of view to get economical results rather then accurate ones for analysis of general complex structures, Mode superposition method and direct integration method are generally used. However, the characteristics of load is not considered in mode superpositon method, the personal computer cannot be used in direct integration methods. To over-come these shortcomings, the component mode method incorporating Ritz algorithm updated is proposed to solve economically dynamic behavior of the structures. The purpose of study is a formulation of algorithm, and computer programing suitable for dynamic analysis of the complex structure in personal computer environment.

• Journal of Haehwa Medicine
• /
• v.21 no.1
• /
• pp.23-31
• /
• 2012

Allopathic medicine has had a lot of limits though it has maintained the status of mainstream medicine, therefore these days there has been a growing interests in traditional medicine of East Asia. According to this trend, the integration between allopathic medicine and traditional medicine has become a hot issue and the need of mutual understanding on their physiology and pathology increases. However, understanding of traditional medical theory based on ying-yang, five phases, viscera and bowels is still difficult to be accepted to allopathic medical fields. Therefore, this research tried to investigate the similarity and differences of the structures between five viscera and organs. As a result, this research found that the investigation and understanding on viscera in traditional medicine or organs in allopathic medicine has in common in some degree. However, the integration and comparison between two medicines should be done cautiously because there still are the basal different points of understanding of human structure and function.

• Journal of Electrical Engineering and Technology
• /
• v.12 no.3
• /
• pp.1227-1234
• /
• 2017

The two-degree-of-freedom direct drive induction motor, which is capable of linear, rotary and helical motion, has a wide application in special industry such as industrial robot arms. It is inevitable that the linear motion and rotary motion generate coupling effect on each other on account of the high integration. The analysis of this effect has great significance in the research of two-degree-of-freedom motors, which is also crucial to realize precision control of them. The coupling factor considering the coupling effect is proposed and addressed by 3D finite element method. Then the corrected mathematical model is presented by importing the coupling factor. The results from it are verified by 3D finite element model and prototype test, which validates the corrected mathematical model.

• Structural Engineering and Mechanics
• /
• v.30 no.5
• /
• pp.593-602
• /
• 2008

This paper presents a new linearization algorithm to find the periodic solutions of the Duffing equation, under harmonic loads. Since the Duffing equation models a single degree of freedom system with a cubic nonlinear term in the restoring force, finding its periodic solutions using classical harmonic balance (HB) approach requires numerical integration. The algorithm developed in this paper replaces the integrals appearing in the classical HB method with triangular matrices that are evaluated algebraically. The computational cost of using increased number of frequency components in the matrixbased linearization approach is much smaller than its integration-based counterpart. The algorithm is computationally efficient; it only takes a few iterations within the region of convergence. An example comparing the results of the linearization algorithm with the "exact" solutions from a 4th order Runge- Kutta method are presented. The accuracy and speed of the algorithm is compared to the classical HB method, and the limitations of the algorithm are discussed.

• Journal of Mechanical Science and Technology
• /
• v.20 no.3
• /
• pp.376-381
• /
• 2006

In this paper, the quaternion, the dual Euler, and the direction cosine methods are numerically compared using a non-aerodynamic 6 degree-of-freedom rigid model at all-attitude angles of an aircraft. The dual Euler method turns out to be superior to the others in the applications because it shows better numerical accuracy, stability, and robustness in integration step sizes. The dual Euler method is affordably less efficient than the quaternion method in terms of computational cost. Numerical accuracy and stability, which allow larger integration step sizes, are more critical in modern real-time applications than computational efficiency because of today's increased computational power. If the quaternion method is required because of constraints in computation time, then a suppression mechanism should be provided for algebraic constraint errors which will eventually add computational burden.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2006.05a
• /
• pp.388-391
• /
• 2006

In the development of sheet-handling machinery, it is important to predict the static and dynamic behavior of the sheets with a high degree of reliability because the sheets are fed and stacked at such a high speed. Flexible media behaves geometric nonlinearity of large displacement and small strain. In this paper, static and dynamic analyses of flexible media are performed by FEM considering geometric nonlinearity. Linear stiffness matrix and geometric nonlinear stiffness matrix based on the Co-rotational(CR) approach are derived and numerical simulations are performed by Updated Newton-Raphson(UNR) method and Newmark integration scheme.

• Nuclear Engineering and Technology
• /
• v.36 no.3
• /
• pp.219-228
• /
• 2004

[1] and [2] present an approach to diagnosing possible defects in the mechanical systems of a nuclear power plant. In this paper, by using a fault library as a database and training data, we develop a diagnostic algorithm 1) to decide whether an Air Operated Valve system is sound or not and 2) to identify the defect from which an Air-Operated Valve system suffers, if any. This algorithm is composed of three stages: a neural net stage, a non-neural net stage, and an integration stage. The neural net stage is a simple perceptron, a pattern-recognition module, using a neural net. The non-neural net stage is a simple pattern-matching algorithm, which translates the degree of matching into a corresponding number. The integration stage collects each output and makes a decision. We present a simulation result and confirm that the developed algorithm works accurately, if the input matches one in the database.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.15 no.5
• /
• pp.3220-3230
• /
• 2014

This paper analyzes the house designs of Kazuyo Sejima and Ryue Nishizawa from the 1900s to the early 2000s' works. By analyzing the degree of space integration of each house using the Convex Map of the Space Syntax Theory, this study arrived at the following conclusions in the respects of private space and public space. First, from period 1 (the 1990s) to period 2 (the first half of the 2000s), the differences between average integration values of private space and public space in their works have decreased. Over time, in general, average integration values of private space have increased, and, on the other hand, those of public space have decreased, leading to smaller differences between two sets of values, which means that, as the integration degrees of private and public spaces have become similar, the boundary which divides spaces becomes blurry. Second, in terms of private space, average integration values of private space in S-3 (House in a Plum Grove) and S-4 (House in China), works of period 2, are the highest among those values of their all 10 works. We can identify that, closure degrees of private space in their works have fallen over time. Third, in terms of public space, average integration values of I-2 (Villa in the Forest), I-5 (S-House), and I-6 (Weekend House), works of period 1, are the highest among those values of their all 10 works. Public space has become more central and open from period 1 to period 2.

• International Journal of Computer Science & Network Security
• /
• v.22 no.10
• /
• pp.369-373
• /
• 2022

In the decision-making domain, a document warehouse is designed to meet the analysis needs of users who may have a wide variety of analysis purposes. In this paper, we propose to integrate the preferences and interactions of users based on profiles to the concept of document warehouses. These profiles guarantee the integration of personalized documents and the collaborative recommendation of documents between different users sharing common interests.