• Title/Summary/Keyword: 정량화 모델

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Quantitative Evaluation of the Collision-Avoidance Capability of Maritime Autonomous Surface Ships Using FMSS (FMSS를 이용한 자율운항선박 충돌회피능력 정량화 평가 기법에 관한 연구)

  • Bae, Seok-Han;Jung, Min;Jang, Eun-Kyu
    • Journal of Navigation and Port Research
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    • v.44 no.6
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    • pp.460-468
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    • 2020
  • Research related to the technology developed for the Maritime Autonomous Surface Ship (MASS) is currently underway. Although one of those core technologies is collision-avoidance technology for ship operators at sea, no research has been done to objectively quantify its effectiveness. Therefore, this study was conducted to develop an evaluation model to examine the collision-avoidance ability of MASS. Ship-control experts performed a ship-handling simulation for each ship encounter type using the Full Mission Ship-handling Simulator (FMSS). We used the resulting data and technical statistics, to develop an evaluation model that utilized FMSS to quantify the operational capability of the collision-avoidance technology. This evaluation model also can be used at sea to assess deck officers' ability to use the technology and to improve and develop other MASS technologies.

A New Quantification Method of Rock Joint Roughness (I) - A Close Assessment of Problems (암석 절리면 거칠기의 정량화에 대한 연구 (I) - 문제점의 규명)

  • Hong, Eun-Soo;Nam, Seok-Woo;Lee, In-Mo
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.7 no.4
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    • pp.269-283
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    • 2005
  • To figure out the cause of underestimating the roughness and shear strength of rock joints suggested by numerous researchers, we analyzed roughness mobilization characteristics, characteristics of roughness parameters, effects of sampling interval, and waviness for roughness parameters. It was found out that lack of understanding of the roughness mobilization characteristics, inappropriate applications of roughness parameters, and effect of aliasing provide a main reasons for those problems. Several practical alternatives for improving those problems were suggested. As far as digitizing methods are concerned, we can find that using a 3D scanner can give a relatively effective result. To avoid aliasing, sampling interval should be less than one-quarter of the minimum asperities. As for the quantification of roughness, it was analyzed that the roughness parameter should be classified into two components depending on the scale of roughness to apply the shear strength model. For classifying the roughness, a framework of the criterion was suggested based on the plastic flow concept for the asperity failure, and the basis for proposing a new alternative shear strength model was established.

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A Study on the Quantitative Diagnosis Model of Personal Color (퍼스널컬러의 정량적 진단 모델 연구)

  • Jung, Yun-Seok
    • Journal of Convergence for Information Technology
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    • v.11 no.11
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    • pp.277-287
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    • 2021
  • The purpose of this study is to establish a model that can quantitatively diagnose personal color. Representative color systems for personal colors have limitations in that it oversimplify personal color diagnosis types or it is difficult to distinguish objective differences between diagnosis types. To develop a brand new color system that enhances this, a PCCS color system capable of logical color was introduced and reclassified based on the four main properties of color. Twenty diagnostic types, which are more diverse than the existing color system were proposed and a quantitative method was used to evaluate the degree of harmony with a subject to find an optimized type of subject. The experimenter's individual competency and subjective intervention were minimized by devising a matrix in which a type suitable for the subject is derived when the coded evaluation result is substituted. Finally a quantitative diagnosis model of personal color consisting of three stages: property diagnosis, coding, and seasonal diagnosis was constructed. It can be seen that this will give diversity, reliability, and accuracy to the existing diagnostic methods.

An Improved Scheme of Evaluation Process in the Advanced Construction Technology Endorsement System (건설신기술 지정제도의 평가프로세스 개선방안)

  • Tae Yong-Ho;Park Chan-Sik
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • autumn
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    • pp.363-366
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    • 2002
  • The advanced construction technology endorsement system(ACTES) has used the improper evaluation criteria. Because of its insufficiency of quantitative evaluation, it is difficult to attain the objective and fairness. This study used a survey to investigate a actual condition of ACTES. The survey found that ACTES needed a evaluation criteria and a quantitative evaluation method. In addition, This study proposes the evaluation model that uses a discriminant function. The model process consists of several phases that are brain storming, t-test and discriminant function analysis.

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Feasibility Study on the Risk Quantification Methodology of Railway Level Crossings (철도건널목 위험도 정량평가 방법론 적용성 연구)

  • Kang, Hyun-Gook;Kim, Man-Cheol;Park, Joo-Nam;Wang, Jong-Bae
    • Proceedings of the KSR Conference
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    • 2007.05a
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    • pp.605-613
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    • 2007
  • In order to overcome the difficulties of quantitative risk analysis such as complexity of model, we propose a systematic methodology for risk quantification of railway system which consists of 6 steps: The identification of risk factors, the determination of major scenarios for each risk factor by using event tree, the development of supplementary fault trees for evaluating branch probabilities, the evaluation of event probabilities, the quantification of risk, and the analysis in consideration of accident situation. In this study, in order to address the feasibility of the propose methodology, this framework is applied to the prototype risk model of nation-wide railway level crossings. And the quantification result based on the data of 2005 in Korea will also be presented.

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A Basic Study on the Qualitative Risk Assessment Model for Building Construction Sites Based on Claim Payouts (건설공사 위험 정량화 모델 개발을 위한 기초 연구)

  • Yu, Yeong-Jin;Son, Kiyoung;Kim, Ji-Myong
    • Journal of the Korea Institute of Building Construction
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    • v.16 no.6
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    • pp.487-495
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    • 2016
  • The losses of accidents in the construction industry was significantly increased during the past decades. Therefore, the study of risk management measures in the domestic construction has become very important, and the inherent risk factors need to derive and analyze them based on the quantified method. However, most studies on the construction risk are conducted finding on the qualitative way. This study analysis the accident records from actual construction sites as a quantities study. A correlation analysis and regression analysis are adopted to identify the risk factors and develop a model. The results of this study are expected to be evolve through the accumulated effect and verification of data in the future through continuous feedback.

A Mapping Algorithm for Real Time Animation Based on Facial Features (얼굴 구성 정보 기반의 실시간 애니메이션을 위한 매핑 알고리즘)

  • Yi, Jung-Hoon;Lee, Chan;Rhee, Phill-Kyu
    • Proceedings of the Korea Information Processing Society Conference
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    • 2000.10b
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    • pp.919-922
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    • 2000
  • 본 논문에서는 가상 인터페이스로서 범용적으로 사용할 수 있는 실시간 비전 기반 얼굴 애니메이션을 제안한다. 이를 위해서 실시간으로 얼굴 구성요소를 추출하고, 이를 정량화 하였다. 정량화된 값과 자연스럽게 매핑하기 위해서 정합함수를 통해 3차원 모델에 맵핑하기 위한 방안을 제안한다. 일반적으로 3차원 애니메이션을 수행할 경우, 기본 모델을 중심으로 특정한 사용자만을 위주로 수행되나, 본 논문에서는 임의의 일반 사용자를 위한 3차원 애니메이션을 수행하였다. 여러 사용자에 대하여 얼굴 구성요소 추출을 이용한 3차원 얼굴 애니메이션 동작에 대하여 실험하였으며 실험결과 여러 사용자 얼굴 애니메이션 동작에 대하여 만족할 만한 성능을 보였다.

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A Basic Study on the Model Development of Quantitative Risk Assessment for Small and Medium-sized Construction Sites. (중소형 건설사업장의 위험 정량화 모델 개발을 위한 기초 연구)

  • Lee, Ji-yeob;Bat, Bagana;Son, Kiyoung
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2022.04a
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    • pp.206-207
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    • 2022
  • Currently, safety accidents in construction area are managed regardless of the size. Therefore, the objective of this study is to conduct for developing the quantitative risk assessment according to large and small and medium-sized construction sites. The scope of this study is limited to the fall accidents which is the biggest accidents in the construction sites. the regression analysis was conducted based on the collected data. As a result, it was confirmed that there was a statistically significant difference between larce and small and medium-sized construction sites. This study is expected to be used as basic data for research on the development of a risk quantitative model for small and medium-sized construction sites in the future.

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A Suggestion of the Hydrogen Flame Speed Correlation under Severe Accidents (중대사고시 수소연소에 의한 화염속도 상관식 제시)

  • Kang, Chang-Woo;Chung, Chang-Hyun
    • Nuclear Engineering and Technology
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    • v.26 no.1
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    • pp.1-8
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    • 1994
  • The flame speed correlation considering thermal-hydraulic phenomena under severe accidents is proposed and correction coefficients are defined. This correlation modifies the pressure dependency in Iijima-Takeno correlation and adds the steam suppression effects to it in the anticipated hydrogen and steam concentration ranges under severe accidents. The existing models of flame speed due to hydrogen combustion under severe accidents are based on the experiments which were performed merely at room temperature and atmospheric pressure. They have difficulty in predicting a accurate flame speed in a case of high temperature and pressure during severe accidents. Thus the flame structure is assumed as a prerequisite to the reliable determination of flame speed and theoretical model is developed. To examine the validity, flame speeds in various conditions calculated by this model are compared with those obtained by the calculation of the existing correlations of the codes such as improved HECTR and MAAP. Also the steam suppression ratio is quantified and the steam suppression coefficient is defined as a composition of mixture. Initial temperature and pressure dependencies are investigated and correction coefficents are determined. More experimental studies can be recommended to improve this correlation to its further works.

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Research on Probabilistic Evaluation of Goal Model (목표모델의 확률적 평가에 관한 연구)

  • Kim, Taeyoung;Ko, Dongbeom;Kim, Jeongjoon;Chung, Sungtaek;Park, Jeongmin
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.17 no.2
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    • pp.263-269
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    • 2017
  • 'Goal Model' is core knowledge of 'Autonomic Control System' suggested to minimize human interference in system management. 'Autonomic Control System' performs 'Monitoring-Analysis-Plan-Execution', that is the four step of 'Autonomic Control', based on 'Goal Model'. Therefore, it is necessary to quantify achievement ratio of 'Goal Model' of target system. Thus, this paper present 'Probabilistic Evaluation of Goal Model' for methodology how to quantify achievement ratio of 'Goal Model'. It comprises 3-steps including 'Goal modeling and weighting', 'Goal model monitoring', 'Goal model evaluation and analysis'. Through these research, we provide core knowledge for 'Autonomic Control system' and it is possible to increase the reliability of system by evaluating 'Goal model' with applying weight. As case study, we apply 'Goal model' to a 'Smart IoT Kit' and we demonstrate the validity of the suggested research.