• 제목/요약/키워드: prior belief

검색결과 44건 처리시간 0.029초

고준위 방사성 폐기물 처분장 확률론적 안전성평가 신뢰도 제고를 위한 입력 파라미터 연속 베이지안 업데이팅 모듈 개발 (Sequential Bayesian Updating Module of Input Parameter Distributions for More Reliable Probabilistic Safety Assessment of HLW Radioactive Repository)

  • 이연명;조동건
    • 방사성폐기물학회지
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    • 제18권2호
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    • pp.179-194
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    • 2020
  • 기존의 확률론적 안전성 평가의 신뢰도 제고를 위하여 잘 알려진 입력 파라미터의 일반적인 분포에 새롭게 측정된 신뢰도 있는 데이터를 결합하여 사후분포를 구할 수 있는 베이지안 업데이팅 방법론을 제안하였다. 마코프체인 몬테 칼로 샘플링 기법의 알고리듬을 통한 GoldSim 모듈도 개발하였다. 복수의 입력 파라미터의 사전분포에 대해 연속적으로 사후분포를 구해낼 수 있는 베이지안 업데이팅이 가능하도록 개발된 이 모듈을 GoldSim 템플릿 형태의 기존의 GSTSPA 프로그램으로 이행하여 보다 신뢰도 있는 확률론적 방사성폐기물 처분 시스템 안전성 평가가 가능하도록 하였다. 이는 기존에 존재하는 사전분포의 일반적인 형태는 취하되 새롭게 얻어지는 실제 측정치나 전문가들의 의견을 기존의 분포에 적용하여 보다 더 높은 믿음을 갖는 입력 파라미터의 사후분포를 얻을 수 있게 한다. 균열암반 내 핵종 이동에 관련된 몇 개의 입력 파라미터의 사전분포의 세차례의 연속적 업데이팅을 통해 프로그램의 유용성도 예시하였다. 이 연구를 통하여 처분시스템과 같이 장기적 평가가 필요하고 넓은 모델링 지역을 가지며 측정된 입력자료가 부족한 경우 보다 더 믿음직한 방법으로 안전성 평가를 수행할 수 있는 것을 보였다.

단어의미 추론에서 나타나는 아동의 마음이론 (Children's Inferring Word Meaning From Understanding of the Speaker's Mind)

  • 송영주
    • 아동학회지
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    • 제27권2호
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    • pp.167-180
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    • 2006
  • This study investigated how children rely on the mind of the speaker to infer unfamiliar words. Sixty 3 to 5-year-old children were interviewed individually with word inference and false belief tasks. Children's sensitivity to the speakers' intentions and prior experiences increased with age. Unexpectedly, their performance was not different with the condition of mind construct. Children's inferring word meanings were positively, but not significantly, correlated with understanding others' false beliefs.

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중재인의 근로자성과 자격요건 - 영국 대법원의 2011년 Jivraj v Hashwani 판결을 중심으로 - (The Employment Issue and Qualifications for Arbitrators: A Comment on Jivraj v Hashwani [2011] UKSC 40)

  • 김영주
    • 한국중재학회지:중재연구
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    • 제26권1호
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    • pp.29-51
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    • 2016
  • This paper reviews the Supreme Court decision of the United Kingdom in Jivraj v. Hashwani (2011) concerning the employment issue of arbitrators, falling within the exception of genuine occupational requirement under the Employment Equality (Religion or Belief) Regulations 2003, and nationality of arbitrators. In 2011, the Supreme Court of the United Kingdom delivered its judgment in Jivraj v. Hashwani, unanimously overturning decision of the English Court of Appeal. The facts of this case and the decision of the Court of Appeal have been widely discussed. The decision of the Supreme Court has been met with approval within the international arbitration community in London, having restored the legal position to that prior to the Court of Appeal's ruling. Thus, the Supreme Court unanimously overturned the Court of Appeal's finding that arbitrators are the employees of the arbitrating parties. Arbitrators were held to be genuinely self-employed, and therefore outside the scope of the Regulations or Equality Act(2010). As such, the anti-discrimination provisions are not applicable to the selection, engagement or appointment of arbitrators. Most importantly, the Supreme Court's finding that arbitrators are not employees removes the possibility of challenges to arbitration agreements on the grounds that they are in breach of the Equality Act. As a practical matter, parties no longer need to consider carving out nationality provisions when drafting arbitration agreements.

초등학교 5학년 아동의 가공식품 섭취와 영양표시 교육의 효과 (Intake of Processed Foods and the Effects of Nutrition Label Education in 5th Grade Children)

  • 장순옥;이옥희;이경실
    • 대한영양사협회학술지
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    • 제14권2호
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    • pp.166-175
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    • 2008
  • The effects of nutrition label education on the perception, nutrition knowledge, understanding and applicability of labeling for 81 5$^{th}$ grade students was assessed. Prior to the education, the students' purchasing behavior of processed food was assessed by self-administered questionnaires. The evaluation of subjects' perception and understanding on nutrition label was completed prior to and following four education sessions utilizing materials developed by Korea Food and Drug Administration and Korea Health Industry Development Institute. More than 90% and 15% of subjects purchased processed food weekly and daily, respectively. Considering the nutrition label became an important factor in food purchases following the education sessions. Perception of the value of nutrition label improved from 2.93 to 3.32, although the belief that nutrition labels contributed to the maintenance of good food intake was not significantly increased. The total nutrition knowledge score increased from 5.47 to 7.14 and understanding nutrients composition table was significantly improved (3.17 to 4.80). The results indicate that a school-based nutrition label education program might be an effective aid for adoption of healthier food choices by children.

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원초적 확률주의와 베이즈 인수 (Radical Probabilism and Bayes Factors)

  • 박일호
    • 논리연구
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    • 제11권2호
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    • pp.93-125
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    • 2008
  • 원초적 확률주의자들은 명제가 경험을 표상한다는 것을 거부한다. 그러나 경험의 영향은 다른 믿음에 전파되고, 다른 사람과 소통될 수 있어야 하기 때문에 명제와 다른 방식으로 경험, 혹은 경험의 영향을 표상할 수 있는 대안을 찾아야 한다. 그들이 제안하는 경험의 영향을 표상하는 유력한 대안은 베이즈 인수이다. 왜냐하면 베이즈 인수는 사전확률의 영향을 제외하고 있으며, 교환성 역시 성립하기 때문이다. 본 논문은 베이즈 인수만이 그런 역할을 하는 것이 아니라고 주장한다. 즉 베이즈 인수의 대안으로 제시된 q(E|$N_p$) 역시 사전확률의 영향이 제외되어 있으며, 교환성 또한 성립한다는 것을 보인다. 그리고 더 나아가 q(E|$N_p$)는 베이즈 인수가 결여한 프래그마틱한 장점을 가진다고 주장한다.

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Fatigue life prediction based on Bayesian approach to incorporate field data into probability model

  • An, Dawn;Choi, Joo-Ho;Kim, Nam H.;Pattabhiraman, Sriram
    • Structural Engineering and Mechanics
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    • 제37권4호
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    • pp.427-442
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    • 2011
  • In fatigue life design of mechanical components, uncertainties arising from materials and manufacturing processes should be taken into account for ensuring reliability. A common practice is to apply a safety factor in conjunction with a physics model for evaluating the lifecycle, which most likely relies on the designer's experience. Due to conservative design, predictions are often in disagreement with field observations, which makes it difficult to schedule maintenance. In this paper, the Bayesian technique, which incorporates the field failure data into prior knowledge, is used to obtain a more dependable prediction of fatigue life. The effects of prior knowledge, noise in data, and bias in measurements on the distribution of fatigue life are discussed in detail. By assuming a distribution type of fatigue life, its parameters are identified first, followed by estimating the distribution of fatigue life, which represents the degree of belief of the fatigue life conditional to the observed data. As more data are provided, the values will be updated to reduce the credible interval. The results can be used in various needs such as a risk analysis, reliability based design optimization, maintenance scheduling, or validation of reliability analysis codes. In order to obtain the posterior distribution, the Markov Chain Monte Carlo technique is employed, which is a modern statistical computational method which effectively draws the samples of the given distribution. Field data of turbine components are exploited to illustrate our approach, which counts as a regular inspection of the number of failed blades in a turbine disk.

실행수준을 고려한 갈등소망 과제 개발 및 유아의 갈등소망 과제수행능력 분석 (Tasks of Conflicting Desires : Inclusion of Executive Level in the Analysis of Preschooler's Task Performance Ability)

  • 김진경;이순형
    • 아동학회지
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    • 제29권6호
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    • pp.177-191
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    • 2008
  • Prior studies were limited in the comparison of false belief tasks with desire tasks due to lack of consideration of level of executive functions. To compensate for this, executive functions were included in new preference-related and game-related tasks of conflicting desire. These tasks were administered to 246 preschoolers ranging from 2.5 to 4 years of age. Statistical analysis was by one-way ANOVA and repeated measures ANOVA. Results showed significant main effects depending on age and task type. Younger children lacked ability of executive function, such as inhibition and working memory. Older preschoolers averaged better scores on task performance, showing that it is difficult for younger children to control their own desires and select the contradicted view.

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Bayesian Estimation of Shape Parameter of Pareto Income Distribution Using LINEX Loss Function

  • Saxena, Sharad;Singh, Housila P.
    • Communications for Statistical Applications and Methods
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    • 제14권1호
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    • pp.33-55
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    • 2007
  • The economic world is full of patterns, many of which exert a profound influence over society and business. One of the most contentious is the distribution of wealth. Way back in 1897, an Italian engineer-turned-economist named Vilfredo Pareto discovered a pattern in the distribution of wealth that appears to be every bit as universal as the laws of thermodynamics or chemistry. The present paper proposes some Bayes estimators of shape parameter of Pareto income distribution in censored sampling. Asymmetric LINEX loss function has been considered to study the effects of overestimation and underestimation. For the prior distribution of the parameter involved a number of priors including one and two-parameter exponential, truncated Erlang and doubly truncated gamma have been contemplated to express the belief of the experimenter s/he has regarding the parameter. The estimators thus obtained have been compared theoretically and empirically with the corresponding estimators under squared error loss function, some of which were reported by Bhattacharya et al. (1999).

생태학적 지각이론에 의한 환경디자인 사례연구 - 노원구 상계동 롯데백화점을 중심으로 - (Model of Environmental Design by the Theory of Ecological Perception)

  • 김수연;민문희
    • 한국실내디자인학회:학술대회논문집
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    • 한국실내디자인학회 2005년도 춘계학술발표대회 논문집
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    • pp.231-234
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    • 2005
  • The ecological theory of perception provides the human living, and meaning integrating norm to overcome the crisis caused by an eastern belief in human-centered wrong rationality formed at the past process of modernization. Prior to the overall consideration of ecological perception theory, looked into the concepts, contribution extent and its limitation of the existing perception theories for the environmental design. By experimentally applying inferred concepts of design to department bridge space and forming the space, certified the applicability of it to the green amenity space. The site Is located in Nowon- Gu Sangge- Dong. The design was processed on the basis of survey, plants growth environment and plants characters. It is expected that this design would serve the commercial space- consumer as a symbolic, environmentally friendly space design

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기업의 정보보안 활동이 구성원의 정보보안 준수의도에 미치는 영향 연구 (A Study on the influence of firm's Information Security Activities on the Information Security Compliance Intention of Employees)

  • 정재원;이정훈;김채리
    • 융합보안논문지
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    • 제16권7호
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    • pp.51-59
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    • 2016
  • 기업의 정보시스템에 대한 내 외부의 위협이 증가되고 있으며 이를 감소시키기 위해 많은 돈과 인력을 투자하고 있다. 하지만 이러한 투자에도 불구하고 보안위협과 사고는 지속적으로 발생하고 있다. 본 연구는 기업의 사고 방지를 위한 다양한 정보보호 활동을 예방 지향적과 억제 지향적으로 구분하고 건강신념모델을 이용하여 기업의 정보보안 활동이 구성원들에게 어떤 영향을 미치고 정보보안 정책을 준수하도록 하는지 연구하였다. 연구결과 예방 지향적 활동은 심각성에, 억제 지향적 활동은 유익성에 유의미한 영향을 주고, 심각성과 유익성은 각각 준수의도에 영향을 주었다. 이러한 결과로 미루어보아, 기업에서 교육, 홍보, 모니터링 등 사전적인 활동을 시행할 경우 미 준수로 발생할 수 있는 부정적인 결과에 대해 강조하여야 하며, 감사, 처벌 등 사후적인 활동을 통해 보안을 유지하고자 할 경우 기업의 의지를 보임으로써 보안 정책을 준수하는 것이 유익할 것이라는 판단을 구성원 스스로 하도록 하는 것이 더욱 효과적인 정보보안 활동이 될 것이다.