• 제목/요약/키워드: What-if Analysis

검색결과 462건 처리시간 0.024초

비선형동적해석을 통한 국내 철골 모멘트골조의 내진성능 평가 (Seismic Performance Evaluation of Steel Moment Frames in Korea Using Nonlinear Dynamic Analysis)

  • 김태완
    • 한국지진공학회논문집
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    • 제16권4호
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    • pp.1-8
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    • 2012
  • 국내 철골모멘트골조를 이전 KBC2005 및 현 KBC2009 기준에 따라 설계한 후 비선형동적해석을 이용하여 FEMA355F의 내진성능평가 절차에 따라 성능을 평가하였다. 그 결과 비선형정적 Push-over 해석을 이용한 역량스펙트럼법과 차이가 있었다. 특히 국내 철골모멘트골조는 약패널존을 가지기 때문에 비선형동적해석을 통해서만 보다 정확한 거동을 예측할 수 있었다. 국내 철골모멘트골조는 지반 조건 SB 또는 SC에 위치한다면 층수 및 R값에 관계없이 성능목표를 만족하는 것으로 나타났다. 하지만 지반 조건 SD 또는 SE에 위치한다면 성능목표 만족 여부는 명확하지 않았다. 따라서 KBC2005나 KBC2009 어떤 기준을 사용하더라도 지반 조건이 상대적으로 좋다면 국내 철골모멘트골조는 내진성능을 충분히 확보하고 있다고 볼 수 있다.

The Cadaver experience of the nursing students

  • Kim, Jung-ae;Eui-Young, Cho
    • International Journal of Advanced Culture Technology
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    • 제5권3호
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    • pp.11-23
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    • 2017
  • Anatomy is one of the basic subjects of the nursing course, which is included in the curriculum of the nursing. Anatomy is a basic course for understanding major in nursing and it is the first gateway to acquire expertise. It is mainly opened in nursing and first to second grades. Therefore, students who have advanced to the nursing department have great interest and expectation on the anatomy subjects. In general, nursing students are studying anatomy with theories and models, and some universities practice on tour after dissection of medical consortium for short time. This is called the Cadaver practice. This study was carried out to investigate the thoughts and experiences of bioethics through nursing students' Cadaver practice. The interview data were processed through the analysis and interpretation process using the phenomenological research method, Giorgi method. As a result, 48 semantic units were derived, and then they were divided into 10 subcomponents and divided into 6 categories. As a result of the analysis, the experience of nursing students' bioethics was tied to the topic of six questions. For example, 'what about the respect and responsibility of nursing students in Cadaver?', 'What about your experience with the Cadaver experiment and bioethics?', 'What was the academic achievement of the actual human body structure viewing experience with cadaver?', 'What was the connection with theory?', 'What was your intention to recommend to others?', 'What was your perception and interest in the Cadaver experiment?'. Analyzes were integrated into 10 structures; "Thank you for your donation", "want others to refuse donation", "Burden of practice", "Good opportunities for learning", "Understand better", "Should study harder", "Memory is better", "Compared to theory", "Good experience", "Want to rejoin". The general structural description of the participants' meanings is summarized as follows. Nursing college students who participated in the Cadaver had a gratitude for the donor, but they said they would like to talk to others about donating organs. Before they went to practice, they felt a lot of pressure on the dissection of the cadaver, but they went to the practice and thought that it was a good opportunity to learn by doing well. Specifically, they understood that they had better understanding than the theoretical lesson, and that they were more eager to study their major through practice. In other words, most of them were more memorable and they would like to participate again if the opportunity comes next time. The results of this study show that the practice of Cadaver in nursing college students is very positive in terms of educational effectiveness. However, in terms of bioethics, it can be seen that the education process is somewhat unsatisfactory. Therefore, the systematic bioethics education should be prepared before the practice in the nursing college students' Cadaver practice.

자연어 처리 기법을 이용한 상품평 분석에 관한 연구 (Analyzing Product Reviews by Consumers using Natural Language Processing Techniques)

  • 전소은;이영구;박경철;백우진
    • 한국HCI학회:학술대회논문집
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    • 한국HCI학회 2009년도 학술대회
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    • pp.660-663
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    • 2009
  • 많은 소비자는 특히 온라인상에서 물건을 구입하고 그 물건에 대하여 자신이 좋아하는 점이나 싫어하는 것을 포함하는 평가를 웹에 올린다. 이 평가를 분석하여 소비자가 물건을 구매할 때 무엇에 관심을 가지고 중요하게 여기는가에 대하여 알 수있다. 에를 들어 노트북을 구매할 때 작성된 평가를 분석하면 어떤 기능이 중요한 구매 결정 요소이며 어떤 것들을 고쳐야 하는지에 대하여 알 수 있다. 하지만 많은 양의 자료를 수동으로 분석하기에는 시간이 많이 걸린다. 따라서 대량의 자료를 쉽게 분석할 수 있는 두 개의 자연어처리 기법을 이용한 자동 분석 방법을 구현하였다. 두 가지 방법은 자동 문서 분류와 자동 정보 추출이다. 네이버 정보 포털에 있는 상품평을 개발한 시스템으로 분석하였고 평가 결과를 도출했다. 자동 분석시스템의 정확율과 재현율 측면에서 유사한 시스템이 다른 자료유형 분석에 적용했을 때와 비교하여 비슷하였다.

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생산과 복지의 제도적 상보성에 관한 비교연구: 선진자본주의 국가를 중심으로 (Institutional Complementaries of Production and Welfare: Some Evidences from the Advanced Welfare Capitalist Countries)

  • 안상훈
    • 한국사회복지학
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    • 제57권2호
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    • pp.205-230
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    • 2005
  • 본 연구는 복지체제와 생산레짐이 서로 연관성을 지니는지, 만약 연관된다면 어떤 방식으로 조응하는지, 그리고 현대복지국가의 두 가지 목표라고 할 수 있는 생산과 분배에서 어떤 차이를 노정하고 있는지에 관한 경험적 분석이다. 본 연구의 분석은 크게 두 부문으로 나뉜다. 하나는 Esping-Andersen의 복지체제론에서 이야기되는 세 가지 체제가 생산과 복지의 포괄적 조응을 담아낼 수 있는가에 관한 군집분석이고, 다른 하나는 이러한 세 가지 체제들이 생산과 복지에 관한 다양한 변수들에 있어 통계적인 차이를 보이는지에 관한 일원분산분석이다. 본 연구의 분석결과는 다음과 같다. 첫째, 군집분석 결과, 자본주의의 다양성에 관한 논의와 세 가지 복지자본체제에 관한 논의는 하나의 분석틀 안에서 소화될 수 있음이 밝혀졌다. 둘째, 일원분산분석 결과, 생산과 복지에 관한 대표적인 변수들이 세 가지 체제 사이에 상당한 차별성을 보임이 확인되었다. 무엇보다 흥미로운 결과는 사민주의, 보수주의, 자유주의 체제들이 유사한 수준의 경제적인 성과를 보이면서도 분배성과에 있어서는 매우 상이한 수준을 지닌다는 점이다.

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한국의 정치세력 간 적대적 갈등의 경제학: 확장 (Economics of Antagonistic Conflict Between Political Forces in Korea: Expansion)

  • 이종민
    • 아태비즈니스연구
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    • 제11권3호
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    • pp.217-227
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    • 2020
  • Purpose - Against the backdrop of the recent intense political conflict in Korea's political circles, it is to reveal from an economic point of view the hidden aspects behind the hostile conflict between the two political forces. Design/methodology/approach - This paper is not a normative study to find a solution to political conflict, but a positive study to reveal the mechanism of reciprocity that exists between the two parties of conflict in real politics. Therefore, the analysis is based on game theory methodology. Findings - It is shown that the ruling party should choose a level of preemptive response that is neither insufficient nor excessive if it aims to avoid radical anti-government struggles by opposition parties. We also find that even if the chances of success of the opposition's radical offensive struggle are low, the use of that strategy is not necessarily reduced. In addition, we have obtained comparative static results that do not deviate much from our intuition. What's interesting is that unlike our intuition that the choice of the method will be indifferent if the marginal effects of radical and normal methods of struggle are the same, the opposition party rather chooses the normal method of struggle more often. Research implications or Originality - In forming the analytical model, it reflected the support of the general public following the opposition's struggle against the ruling party in order to capture real politics well in the conflict between the two opposing parties.

녹색물류 환경에서 자판기 공급사슬 운영을 위한 의사결정지원시스템의 개발 (A Decision Support System for the Operations of Vending Machine Supply Chains in a Green Logistics Environment)

  • 박양병;윤성준
    • 산업공학
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    • 제25권3호
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    • pp.338-346
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    • 2012
  • Regarding the green environment, it is important to boost the spread of environmentally friendly vending machines and to operate the vehicles for their inventory replenishments while minimizing emissions of greenhouse gases. In general, the vending machine management company lacks capability to operate the supply chain effectively in an integrated way under the dynamic, complex, and stochastic environment. This paper presents a decision support system, termed DSSVM, for the operations of the general and smart vending machine supply chains with stock-out-based, one stage item substitution in a green logistics environment. The DSSVM supports the estimation of item demand and substitution probabilities, determination of operation parameters, supply chain analysis, what-if analysis, and $CO_2$ analysis for which various analytical models are employed.

Stochastic Project Scheduling Simulation System (SPSS III)

  • Lee Dong-Eun
    • 한국건설관리학회논문집
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    • 제6권1호
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    • pp.73-79
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    • 2005
  • This paper, introduces a Stochastic Project Scheduling Simulation system (SPSS III) developed by the author to predict a project completion probability in a certain time. The system integrates deterministic CPM, probabilistic PERT, and stochastic Discrete Event Simulation (DES) scheduling methods into one system. It implements automated statistical analysis methods for computing the minimum number of simulation runs, the significance of the difference between independent simulations, and the confidence interval for the mean project duration as well as sensitivity analysis method in What-if analyzer component. The SPSS 111 gives the several benefits to researchers in that it (1) complements PERT and Monte Carlo simulation by using stochastic activity durations via a web based JAVA simulation over the Internet, (2) provides a way to model a project network having different probability distribution functions, (3) implements statistical analyses method which enable to produce a reliable prediction of the probability of completing a project in a specified time, and (4) allows researchers to compare the outcome of CPM, PERT and DES under different variability or skewness in the activity duration data.

외해 가두리 대구 양식업 경제적 타당성 분석 (Analysis of Economical Validity about Offshore Cage Culture for Cod)

  • 이광남
    • 수산해양교육연구
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    • 제28권6호
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    • pp.1724-1738
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    • 2016
  • This paper was researched on economic feasibility and sensibility of operation to offshore cage culture for cod. Offshore cage culture for cod needs to invest high budget what to construction and operation. And it was required variety methods about analysis of economic feasibility. Therefore, these were studied NPV, B/C and sensitivity for each by assuming a six scenarios considering the product performance according to the size of cod and culturing methods of fingerlings, etc. As a results, even though economy, if efficiency is low, it is a priority need the technical development to promote the feed efficiency to increase economic feasibility and should make efforts to enhance the business economy to strengthen the price competitiveness pricing with high quality products through quality control and brand recognition of cod. It expects to be used as a reference for related research in the future by deriving policy implications based on the method of analysis of the economic feasibility on offshore cage culture for cod.

Spatiotemporal Impact Assessments of Highway Construction: Autonomous SWAT Modeling

  • Choi, Kunhee;Bae, Junseo
    • 국제학술발표논문집
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    • The 6th International Conference on Construction Engineering and Project Management
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    • pp.294-298
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    • 2015
  • In the United States, the completion of Construction Work Zone (CWZ) impact assessments for all federally-funded highway infrastructure improvement projects is mandated, yet it is regarded as a daunting task for state transportation agencies, due to a lack of standardized analytical methods for developing sounder Transportation Management Plans (TMPs). To circumvent these issues, this study aims to create a spatiotemporal modeling framework, dubbed "SWAT" (Spatiotemporal Work zone Assessment for TMPs). This study drew a total of 43,795 traffic sensor reading data collected from heavily trafficked highways in U.S. metropolitan areas. A multilevel-cluster-driven analysis characterized traffic patterns, while being verified using a measurement system analysis. An artificial neural networks model was created to predict potential 24/7 traffic demand automatically, and its predictive power was statistically validated. It is proposed that the predicted traffic patterns will be then incorporated into a what-if scenario analysis that evaluates the impact of numerous alternative construction plans. This study will yield a breakthrough in automating CWZ impact assessments with the first view of a systematic estimation method.

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IT서비스 프로젝트에서의 팀 내 갈등현상에 관한 비교사례연구 (A Case Study on the Team Conflict Phenomenon in IT Service Project)

  • 박상희;조남재
    • Journal of Information Technology Applications and Management
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    • 제16권4호
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    • pp.109-134
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    • 2009
  • Compared to research on the success of IT projects in general, research on the management of conflict in IT teams and its impact on project success is insufficient. This research performed a comparative study to analyze the nature and evolving phenomenon of conflicts in IT project teams. This study aimed at; First, Why a conflict is created within and around an IT project team. Second, What is the phenomenon of conflict evolution, diffusion, and/or resolution? Third, How the differences in conflict management style affects the IT project performance? Three propositions were drawn from the analysis of two intensive analysis of conflict cases and their comparison. Proposition 1 : Both 'the method of pointing out a problem' and 'the pointed-out contents' can be the trigger of conflicts around an IT project. Proposition 2 : While the focus of attention of one party is 'the method of pointing out a problem', if the other's and focus of attention of one party is 'the pointed-out contents', that is, if the focus of attention mismatch, the conflict can be amplified. Proposition 3 : According to the temporal nature of the relationship, e.g., short-term versus long-term, the way people approach and deal with the conflict differs.

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