• Journal of Biosystems Engineering
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• 제42권3호
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• pp.170-189
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• 2017

Purpose: This paper presents Raman chemical imaging technology for inspecting food and agricultural products. Methods The paper puts emphasis on introducing and demonstrating Raman imaging techniques for practical uses in food analysis. Results & Conclusions: The main topics include Raman scattering principles, Raman spectroscopy measurement techniques (e.g., backscattering Raman spectroscopy, transmission Raman spectroscopy, and spatially offset Raman spectroscopy), Raman image acquisition methods (i.e., point-scan, line-scan, and area-scan methods), Raman imaging instruments (e.g., excitation sources, wavelength separation devices, detectors, imaging systems, and calibration methods), and Raman image processing and analysis techniques (e.g., fluorescence correction, mixture analysis, target identification, spatial mapping, and quantitative analysis). Raman chemical imaging applications for food safety and quality evaluation are also reviewed.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제8권6호
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• pp.2118-2138
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• 2014

Risks are involved in all phases of the software life cycle, and due to these risks, software can face various problems that can cause different negative outcomes and sometimes, in extreme cases, the failure of the software. Most of these risks lie in the legacy software migration process. These risks can create many problems, and in the worst case they can lead to the failure of the migration project. This paper explores different types of risk analysis methods such as CRAMM, CORAS, OCTAVE and VECTOR. After comparing these methods, the two suitable methods were chosen, namely, OCTAVE and VECTOR. Based on the use of these two methods, the project suggests an enhanced EOV method for risk analysis in the migration of legacy software.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2009년도 세계 도시지반공학 심포지엄
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• pp.1202-1205
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• 2009

Embankment preloading, in conjunction with prefabricated vertical (PV) drains, was used to accelerate consolidation of marine clays in Pusan New Harbour project. UP to eightteen settlement plates were installed at the ground reclamated site under the embankment fill to monitor the preload performance. This analysis is carried out by five settlement prediction methods including the Asaoka, Hyperbolic, Hoshino, and back-analysis method based on optimization. The field settlement data can be analysed by settlement prediction methods to predict the ultimate settlement and the degree of consolidation of the reclaimed land under charge fill. The authors compared with the analyzed results of the methods.

• 한국철도학회논문집
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• 제3권2호
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• pp.43-50
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• 2000

The corrugated panels are the prime candidate structure for the floor, roof and wall of Korean high speed train. The equivalent continuum modeling approach panels can be used for the efficient design and evaluation of their structural characteristics. The equivalent continuum models, derived from the true complex corrugated panels, should have the same structural behavior as the original structures have. This paper briefly reviews three representative continuum modeling methods: the static analysis method and two plate-models based on modal analysis methods (MAM). These methods are evaluated through some numerical examples by comparing the natural frequencies and static deflections. It is observed that the plate-model based on Rayleigh-Ritz method seems to provide the best results when used in conjunction with the cantilever-type boundary conditions. The equivalent elastic constants of various corrugated panels, depending on the changes in their configurations, are tabulated for efficient use in structural design.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 1999년도 춘계 학술발표회 논문집 Proceedings of EESK Conference-Spring
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• pp.135-142
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• 1999

Although the vibration control effects of viscoelastic dampers in building structures have been well proved by numerous theoretical and practical examples it is difficult to find an outstanding method for analysis of viscoelastically damped structures satisfying both exactness and efficiency. Thus in this study four analysis methods for viscoelastically damped structures that are currently used or can be applied for the those system are speculated and compared to provide bass for developing a better method for analysis of viscoelastically damped structures. The seismic response time history inter-story drfts and analysis time recorded by computer simulation of four different methods are compared. Among these methods complex modal superposition approach turns out to be ecomomic and accurate procedure.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권5호
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• pp.2273-2286
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• 2018

This paper describes transformations between elemental image arrays and a RGBD image for three-dimensional integral imaging and transmitting systems. Two transformations are introduced and analyzed in the proposed method. Normally, a RGBD image is utilized in efficient 3D data transmission although 3D imaging and display is restricted. Thus, a pixel-to-pixel mapping is required to obtain an elemental image array from a RGBD image. However, transformations and their analysis have little attention in computational integral imaging and transmission. Thus, in this paper, we introduce two different mapping methods that are called as the forward and backward mapping methods. Also, two mappings are analyzed and compared in terms of complexity and visual quality. In addition, a special condition, named as the hole-free condition in this paper, is proposed to understand the methods analytically. To verify our analysis, we carry out experiments for test images and the results indicate that the proposed methods and their analysis work in terms of the computational cost and visual quality.

• Geomechanics and Engineering
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• 제17권3호
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• pp.247-252
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• 2019

Modulus of deformation of soil is an essential parameter used for design analysis of foundations, despite its importance; little attention is paid to developing empirical models for predicting the sensitivity of deformation moduli to other parameters that obtained from the pressuremeter tests. Various methods of analysis used to predict the horizontal at rest pressure from pressuremeter testing ($P_o$), these values showed distinctive variations, five methods used to evaluate the values of horizontal at rest pressure, these values been used to evaluate the modulus of elasticity using three methods of analysis. The values of modulus showed distinctive increase when the values of horizontal at rest pressure increase for the same pressuremeter test, these increases may reach to 65%. This sensitivity of the moduli to values of horizontal lead the author to propose some reliable methods of analysis for both the horizontal at rest pressure and the modulus of deformation from pressuremeter testing.

• 한국지반신소재학회논문집
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• 제17권4호
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• pp.41-52
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• 2018

복합지반 설계법은 계산이나 수치해석시 적용하기 편리하여 시멘트혼합처리공법의 설계시 많은 설계자들에 의해 적용되고 있다. 그러나, 복합지반 설계법은 다짐말뚝공법(SCP, GCP)에 관하여 개발된 것으로 시멘트혼합처리공법에 대한 시험시공 등의 실제 결과와의 비교 분석은 미미하다. 본 연구에서는 2차원 유한요소 수치해석을 통해 복합지반 해석법, 개별말뚝해석법 등 다양한 해석법의 결과를 실측과 비교 분석하였다. 본 연구 결과, 지표면에서의 침하는 Plate 요소만을 적용하는 방법의 침하량이 실측에 비해 크게 예측되었고, 기타 방법은 유사한 것으로 나타났다. 개량지반 직하부에서만 발생된 침하량의 크기가 크게 나타났고, 침하량, 수평변위 및 지반반력 등에 대하여 실측과 수치해석 결과를 비교하면 등가벽 개념의 개별말뚝 해석법이 가장 유사한 것으로 나타났다. 복합지반법의 경우 응력전이(지반아칭) 현상을 예측하지 못하였고, 수평변위를 과대 예측하는 것으로 나타났다.

• 인터넷정보학회논문지
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• 제19권6호
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• pp.133-145
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• 2018

의료기기 분야의 시스템들은 사고가 발생할 경우 상해 등의 큰 피해를 줄 수 있으므로 사고가 발생할 수 있는 원인을 찾아 사고를 예방하고 피해를 최소화하는 해저드 분석 활동이 필수적이다. 해저드 분석 활동은 분석 목적에 따라 수행 방법이 다르고 적용할 수 있는 개발 단계가 다르기 때문에 분석 대상 시스템에 적합한 기법을 선택하는 것은 매우 어려운 일이다. 개발 단계 중 개념 단계에서 식별된 해저드를 기반으로 해저드를 완화하거나 예방하기 위한 기본 안전 요구사항이 도출되기 때문에 개념 단계에서 적합한 해저드 기법을 선택하는 것은 매우 중요하다. 본 논문에서는 의료기기 분야 시스템들의 해저드 분석 활동에 적합한 기법을 선택할 수 있도록 개발 단계 중 개념 단계에서 PHA 기법과 STPA 기법을 비교하도록 한다. 이 분석을 통해 의료기기 시스템에서 개념 단계의 적합한 해저드 분석 기법을 선정할 수 있을 것이다.

• Journal of the Korean Data and Information Science Society
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• 제14권2호
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• pp.257-264
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• 2003

The perception of the importance of statistical methods for processing medical data in Korea's medical research and the practical use of the analysis method are insufficient. From this standpoint, in order to examine the features of the data analysis method used in the medical journals of Korea and America, we have examined the research papers which has been published in the exemplary medical journals of both countries. It showed that there was a large difference in the quantity and quality between Korea and America. Especially in the medical research of Korea, we could notice that the use of statistical methods were comparatively low. Hence the researchers in the medical area are encouraged to use more statistical methods in processing medical data.