• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2008.10a
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• pp.5-8
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• 2008

This study proposed the Knowledge Base Building method reflecting the user's preferences based on the fuzzy set theory to develop information contents which support pedestrian's navigation. This research evaluated subject's preferences on the commercial spaces set to the hypothetical destination. Also it surveyed the causal relationship between the visual characteristics and the emotional characteristics to propose the methods of Navigation Knowledge Base (NKB). The NKB was composed by three elements; 1.the correlation model between emotional characteristics, 2.the causal relationship between visual characteristics and emotional characteristics, 3.the transformation model between visual characteristics and the physical characteristics.

• Journal of Korean Academy of Nursing
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• v.33 no.1
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• pp.26-33
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• 2003

Purpose: The purpose of this study was to investigate the relationships among variables of somatic attribution, chronic pain, depression and chronic fatigue in the elderly. Methods: Empirical data for testing hypothetical models was collected from 311 people over 65 years old in a community settings in Seoul, Korea in June and July, 2000. Data were analyzed by descriptive statistics and correlational analysis using pc-SAS program. The Linear Structural Modeling(LISREL) 8.0 program was used to find the best fit model which explained causal relationship of variables. Result: According to Accepted model, the relation of variables is that the somatic attribution is the influencing variable to chronic pain and depression and chronic pain and depression is the influencing variable to chronic fatigue. Conclusion: The findings of this study give useful information to construct intervention program relating chronic pain, depression and chronic fatigue for the elderly.

• Earthquakes and Structures
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• v.5 no.3
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• pp.359-378
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• 2013

The problem of identification of multi-component and (or) spatially varying earthquake support motions based on measured responses in instrumented structures is considered. The governing equations of motion are cast in the state space form and a time domain solution to the input identification problem is developed based on the Kalman and particle filtering methods. The method allows for noise in measured responses, imperfections in mathematical model for the structure, and possible nonlinear behavior of the structure. The unknown support motions are treated as hypothetical additional system states and a prior model for these motions are taken to be given in terms of white noise processes. For linear systems, the solution is developed within the Kalman filtering framework while, for nonlinear systems, the Monte Carlo simulation based particle filtering tools are employed. In the latter case, the question of controlling sampling variance based on the idea of Rao-Blackwellization is also explored. Illustrative examples include identification of multi-component and spatially varying support motions in linear/nonlinear structures.

• Proceedings of the KIEE Conference
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• 1993.07a
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• pp.144-147
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• 1993

The long-term electricity resource planning of electric utility has undergone significant change during the past decade. The current resource planning can be considered as multi-objective decision making procedure under the various uncertainties such as demand growth, construction cost, fuel price, environmental regulation, plant site, financial adequacy, new technology advent and so on. This paper presents a standardized electricity resource planning scheme using the strategic planning concept. EGEAS computer model was fully applied to indentify feasible alternative plans and simulate various attribute values corresponding each alternative plan and future. As a case study, a hypothetical long-ten capacity expansion planning problem is analyzed.

• Journal of the Korean Society for Precision Engineering
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• v.21 no.5
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• pp.188-202
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• 2004

This research was designed to investigate biomechanical aspects of the evolution based on the hypothesis of dynamic cooperative interactions between the locomotion pattern and the body shape in the evolution of human bipedal walking The musculoskeletal model used in the computer simulation consisted of 12 rigid segments and 26 muscles. The nervous system was represented by 18 rhythmic pattern generators. The genetic algorithm was employed based on the natural selection theory to represent the evolutionary mechanism. Evolutionary strategy was assumed to minimize the cost function that is weighted sum of the energy consumption, the muscular fatigue and the load on the skeletal system. The simulation results showed that repeated manipulations of the genetic algorithm resulted in the change of body shape and locomotion pattern from those of chimpanzee to those of human. It was suggested that improving locomotive efficiency and the load on the musculoskeletal system are feasible factors driving the evolution of the human body shape and the bipedal locomotion pattern. The hypothetical evolution method employed in this study can be a new powerful tool for investigation of the evolution process.

• Geomechanics and Engineering
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• v.13 no.6
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• pp.963-975
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• 2017

Improvement of soft clay deposit by preloading with vertical drains is one of the most popular techniques followed worldwide. These drains accelerate the rate of consolidation by shortening the drainage path. Although the analytical and numerical solutions available are mostly based on equal strain hypothesis, the adoption of free strain analysis is more realistic because of the flexible nature of the imposed surcharge loading, especially for the embankment loading used for transport infrastructure. In this paper, a numerical model has been developed based on free strain hypothesis for understanding the behaviour of soft ground improvement by vertical drain with preloading. The unit cell analogy is used and the effect of smear has been incorporated. The model has been validated by comparing with available field test results and thereafter, a hypothetical case study is done using the available field data for soft clay deposit existing in the eastern part of Australia and important conclusions are drawn therefrom.

• The Journal of Korean Society for School & Community Health Education
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• v.18 no.3
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• pp.29-44
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• 2017

Objectives: The purpose of this study is to identify the influencing factors of adolescents' life satisfaction. Methods: The data of the 6th Korean Child-Youth Panel Survey(KCYPS) was analyzed using the SPSS 24.0 and 24.0 AMOS program. Based on literature review, a hypothetical model consisted of six theoretical variables, twelve paths and seventeen measurable variables. Results: The modified model showed a goodness of fit to the empirical data(GFI=0.958, AGFI=0.940, NFI=0.945, RFI=0.931, TLI=0.904, RMSEA=0.055). Ten paths among twelve paths proved to statistically significant. Depression showed statistically significant effects on adolescents' life satisfaction directly. Personal characteristics, parenting behavior, peer attachment and self-esteem showed statistically significant effects on adolescents' life satisfaction directly and indirectly. Personal factors and external environmental factors affect adolescents' life satisfaction. Conclusions: Based on the results of this study, it is necessary to develop programs to improve adolescents' life satisfaction.

• Transactions of Materials Processing
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• v.28 no.2
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• pp.89-97
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• 2019

In this paper, we examine the application of a new concept - on-line FE model in various metal rolling processes. This technology allows for completion of process simulation within a tiny fraction of a second without losing the high level of prediction accuracy inherent to FEM. The procedure is systematically demonstrated through the design of actual on-line models for the prediction of the width spread in horizontal rolling of the slab using a dog bone profile and horizontal rolling of the strip with a strip profile. The validity and the prediction accuracy of the on-line FE models were analyzed and discussed.

• Proceedings of the Korea Association of Crystal Growth Conference
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• 2000.06a
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• pp.87-125
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• 2000

A new paradigm of crystal growth was suggested in a charged cluster model, where charged clusters of nanometer size are suspended in the gas phase in most thin film processes and are a major flux for thin film growth. The existence of these hypothetical clusters was experimentally confirmed in the diamond and silicon CVD processes as well as in gold and tungsten evaporation. These results imply new insights as to the low pressure diamond synthesis without hydrogen, epitaxial growth, selective deposition and fabrication of quantum dots, nanometer-sized powders and nanowires or nanotubes. Based on this concept, we produced such quantum dot structures of carbon, silicon, gold and tungsten. Charged clusters land preferably on conducting substrates over on insulating substrates, resulting in selective deposition. if the behavior of selective deposition is properly controlled, charged clusters can make highly anisotropic growth, leading to nanowires or nanotubes.

• Journal of the Korean Society of School Health
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• v.26 no.2
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• pp.72-80
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• 2013

Purpose: This study was done to construct and test a structural model to explain factors associated with middle school students' suicidal ideation focusing on mediating effects of anger and depression Methods: Data was collected by questionnaires from 349 students selected randomly in 11 middle schools in D city. The data were analyzed using PASW 18.0(win) and AMOS 18.0(win) program. Results: Model fit indices for the hypothetical model were in good agreement with the recommended levels (CFI=.957, GFI=.945). Based on the constructed model, depression was significantly affected by anger directly, and suicidal ideation was directly influenced by depression, indirectly by anger. It was confirmed that depression turned out to be a important mediating variable on suicidal ideation and anger in middle school students. Conclusion: The results suggest that intervention strategies for dealing with anger or depression is important to reduce the suicidal ideation in middle school students. In addition, specific nursing intervention plans, including fostering of humanistic and achievement-focused educational environment, peer support programs, and individual counselling, need to be developed and implemented to control a feeling of anger and depression.