• Journal of Korean Port Research
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• v.14 no.1
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• pp.77-86
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• 2000

The planning process of complex projects in oceanic architectural engineering is characterized by the cooperation of many involved specialists and by a high degree of information exchange. In order to improve the quality of the structural design of oceanic buildings, information of different involved partners in the planning process has to be integrated. This paper aims to introduce a concept of the integrated structural design for the floating-type oceanic building using STEP(Standard for the Exchange of Product Model Data). STEP(ISO 10303) is an international standard for the computer-interpretable representation and exchange of product data and it provides a consistent data exchange format and application interfaces between different application systems. In this paper, the structural design process and information of oceanic buildings is analyzed and product models are preposed fir the exchange of the structural design information between superstructure and floating structure. The entities for calculating wind loads, metacenter and restoring forces are represented by Express. As a case study a floating hotel is applicated to describe the STEP physical file.

• Journal of Institute of Control, Robotics and Systems
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• v.19 no.4
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• pp.334-340
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• 2013

Using a relationship between step length and accelerometer output, step length can be estimated. In this paper, we propose a new step length estimation algorithm, which can be used both for the plane and the slope by compensating the slope angle. The slope angle is estimated using a barometer and the slope angle is compensated by observing how the slope affects the step length estimation. The proposed algorithm is verified using five adult man walking data, where the average length error is about 3% regardless of the slope.

• Journal of the Korean housing association
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• v.11 no.4
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• pp.9-22
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• 2000

The residential mobility and the housing choice procedures play a significant role on households welfare. This procedure consists of $\circled1$ Moving motives step, $\circled2$ Housing search step, $\circled3$ Assessment of housing alternative step, $\circled4$ Choice and evaluating after choice step, $\circled5$ Intention to move step. There are linkages with each step. The higher the level of moving motives, the higher the level of housing search efforts. The higher the level of housing search efforts, the higher the level of housing alternative evaluating. The higher the level of housing alternative evaluating, the higher the level of housing satisfaction after they choose a house. The higher the level of housing satisfaction after they choose a house, the lower the level of intention to move. So the whole procedure of housing choice among consumers has a main streaming throughout the steps.

• Journal of applied mathematics & informatics
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• v.38 no.5_6
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• pp.439-461
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• 2020

A step-up option is a newly developed financial instrument that simultaneously provides higher security and profitability. This paper introduces two step-up options: step-up type1 and step-up type2 options, and derives the option pricing formulas using the Laplace transform. We assume that the underlying equity price follows a regime-switching model that reflects the long-term maturity of these options. The option prices are calculated for the two types of funds, a pure stock fund composed of risky assets only and a mixed fund composed of stocks and bonds, to reflect possible variety in the fund underlying asset mix. The impact of changes in the model parameters on the option prices is analyzed. This paper provides information crucial to product developments.

• Proceedings of the KIEE Conference
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• 2003.07a
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• pp.335-337
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• 2003

The protection against transient instability and consequent out-of-step condition is a major concern for the utility. The unstable system may cause serious damage to system elements such as generators and transmission lines. Therefore, out-of-step detection is essential to operate a system safely. This paper presents the Out-of-Step detection algorithm using voltage frequency variation. The digital filters based on Discrete Fourier Transforms (DFT) to calculate the frequency of a sinusoid voltage are used, and the generator angle is estimated using the variation of the calculated voltage frequency. The proposed out-of-step algorithm is based on the assessment of a transient stability using equal area criterion. The proposed out-of-step algorithm is verified and tested by using EMTP MODELS.

• Journal of Agricultural Extension & Community Development
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• v.4 no.1
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• pp.1-14
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• 1997

This research was carried out to provide the basic informations for the study of the occupational socialization process of rural development workers. Until now in a study of rural development workers, the study about the socialization process, which is to study the whole change during the life, has not been sufficient. The occupational socialization process of rural development workers may be considered both a process from life as a pre-rural development workers to life as a rural development worker and a process of retirement or resigination as a rural development worker. The socialization process of rural development workers in general is presumed as the five steps. Each theme word corresponding to the cultural characters in each step is as following. (1) Expectation toward Uncertainty: Step before Life of Employing (2) Extra-Passion and Trial and Error: Step for Adapting the Working Life (3) Swimming: Step of Dissension and Desperation (4) Sinking or Avoiding Dissension: Step of Stability and Stagnation (5) Emptying a Lonely Mind: Step of Professional Inactivity and Retirement The five steps appear mixedly and irregularly. At each step, rural development workers can feel the sense of fruitage and dignity (a naive compensatory mind) despite appearance intermittent and unclear.

• The Korean Journal of Nuclear Medicine Technology
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• v.17 no.1
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• pp.80-84
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• 2013

Purpose: The Immunotech AFP is a widely used test in 14 hospitals(RIA QC establishments: 46) as a liver tumor marker. Normally, the test takes 45 minutes including complicated 2 step method. We evaluated the possibility of 1 step method and suitable test time. Materials and Methods: Samples of 31 patients in SNUBH were used as subject. We evaluated the sensitivity, intra and inter assay precision, recovery rate, linearity between 1 step and 2 step method (45 min. and 60 min.). Results: Both of 45 minutes and 60 minutes test showed 0.1 ng/mL sensitivity. In 45 minutes test, the intra assay coefficients of variation were 3.05%, 3.43%, 1.68%. Also, inter assay coefficients of variation were 3.91%, 2.38%, 0.82%. In 60 minutes test, the intra assay were 5.00%, 3.69%, 1.97%, inter assay were 3.14%, 3.71%, 1.85%.The correlation coefficient of each 2 step and 1 step (45 min.), 2 step and 1 step(60 min.), 1 step (45 min.) and 1 step (60 min.) were y=0.9293x+2.7356 ($R^{2}=0.9999$), y=0.9193x+4.1002 ($R^{2}=0.9993$), y=0.9894x+1.3805 ($R^{2}=0.9997$). Conclusion: Compared 1step method to 2 step method, both method showed very reasonable precision, recovery rate and correlation coefficient. Also, 1 step method(45 min.) of correlation coefficient ($R^2$) was 0.999. We suggest that 1 step method test can reduce the test time and is useful for AFP test.

• Journal of the Korean Institute of Gas
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• v.18 no.4
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• pp.76-85
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• 2014

To establish the necessary safety technology in high-pressure toxic gas facilities, especially for the corrosion, which is the main causes of toxic gas accident, this study adopts and investigates the API-581 procedures developed by the American Petroleum Institute (API). And the applicability of the 8-step analytical procedures of consequence analysis in API-581 is discussed, and a method for consequence analysis in high-pressure toxic gas facilities is suggested. Based on the discussion and results, the analytical procedure is simplified as the 6 steps in total for the effective application to high-pressure toxic gas facilities: Step 1 (determination of representative material), Step 5 (determination of release type), Step 6 (determination of phase of fluid), and Step 8 (estimation of damage range) are not applied: Step 3 (estimation of total amount of release) is applied only for the inventory group concept; Step 4 (estimation of release rate) only for the gas release rate; and all of Step 2 (selection of release hole size) and Step 7 (evaluation of post-release response) are applied. In the proposed method, the generally applicable method of CCPS is adopted as alternative method for Steps 5 and 8.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.37 no.7
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• pp.841-849
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• 2013

In this study, a 2-step stamping model with an additional 1st stamping tool is proposed to reduce stamping flaws in the curved parts of a dimple in a nuclear fuel spacer grid. First, the strains of curved part of dimple are characterized via a comparison with strain solutions in pure bending. A reference 2D finite element (FE) model of 1-step stamping is then established, and the corresponding maximum strain is obtained. By varying the values of design variables of the 1st stamping tool in the 2-step stamping model, FE solutions are obtained to express the strain as a function of process variables, which provides the optimum values of process variables. Finally, applying these optimum values to a 3D FE model, we demonstrate the enhanced formability of the proposed 2-step stamping model.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.8 no.4
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• pp.269-273
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• 1996

A new type of perforated block is presented to be used in the construction of a step seawall. Two-dimensional hydraulic model test is performed to compare the overtopping rates between the traditional non-perforated step seawall and the perforated step seawall constructed with the new type of perforated blocks. The overtopping rate of the perforated step seawall is lower than that of the traditional non-perforated step seawall. The new type of perforated step seawall may be used as an alternative for water-amenity seawall in the future.